Home

TM 11-6625-3016-14 - The Repeater Builder`s Technical Information

Contents

1. PCB ASSY AGC SYSTEM u 7010 2366 600 Figure 6 8 system schematic diagram 6 23 6 24 blank TM11 6625 3016 14 IX GI CC EE IM wi MEME eg nny D OE SS SS SS E DE CAD DECADE DECADE DECADE R GNER 02 INTE COUNTER COUNTER 1 LAST REF NO USED DRAFTSMANS NOTES 4 0 i 88 2204 Mea AIA3A4FLI JIO ON SHT BECOMES a AI ABA4J5 Ho C2 103 A A3A4 3 AlA3A4A1E4 ALASAAFL 7 I AIASASATX 1 2 ALL RESISTORS ARE 1748 10 UNLESS OTHERWISE NOTED og l l 3 ALL REBISTANCE EXPRESSED IN ca OHMS UNLESS OTHERWISE HOTED TO10 2309 300 4 ALL REF NO G CARRY AN ASSIGNED 7 DESIGNATOR SERIES THIS SCHEMATIC A 14344 CARRIES SERIES 4 AND E us THEREFORE Ri DESIGNATED I 12799 20 me CLOCK DIVIDER e ASSY 1 7010 2308 300 tnc Am C MECH ASS Y DIVIDER too Figure 6 9 Clock divider A1A3A4 schematic diagram 6 25 6 26 blank TM11 6625 3016 14 age CDM M fa
2. 4 6 68 8 Sk ib 5618 4 Sk l 2 6 8 2 c red 25503 10 Nine E 100 Mhz WAVE 34 p FROMTCHQ LRATTSMAN NOTES BUSY BMP 1 GN SHT 1 15501 BECOMES amp IAZAALI 1 45692 1 NOTES 95503 1 LAST REF ND JSFD 15504 AiA2AAIFLI 7 350 ALARGA IFL J4 AIA AAIAIC3 T pec El E Lou Mf 108 198 uns ad I en 5 Aina al E R22 Lr a is iii E 100 MHz MHz MIXER A88Y 1 2 50610 2 5 SKGIB 2 BK8IB 2 18504 D 1096 UNI L 7017 2321 900 2 ALL RESISTORS ARE W 1096 UNLESS THERWISF NOTED 33 107 8001 108 3 ALL RESISTANCE IS EXPRESSED IN OHMS UNLESS CTHERWISE NOTED cena 57 p 4 ALL CAPACITANCE EXPRESSE IN UNLESS cour ss OTHERWISE NOTED ager oe o gi 5 ALL NO S CARRY AN ASSIGNED DESIGNATOR SERIES teg THIS OOl 100 Wr Miz MXR ASSY SCHEMATIC CARRIES SERIES amp THEREFORE L 7012 2309 500 Ri IS DESIGNATED 2 AIAR 56 T 5600 515201 100 wa P O asav 4 7010 2309 600 Figure 6 36 100 MHz amplifier 108 MHz mixer A1A24A1 sc
3. 11 6625 3016 14 PART OF J4303 CRT H RIZ OFL CRT HORIZ DFL A SR 12 PART Of J4302 E SCOPE BLANKING 7124 4300 score merc en ae 7010 2362 500 1 M cuu Cd D Su u TN M ME Z Figure 6 30 Oscilloscope main circuit board A1A18A4 schematic diagram sheet 2 of 2 6 81 6 82 blank TM11 6625 3016 14 TIPO CNT tS BP Pa NDP ar v SWEEP CAPAC 7 SWEEP 810 OUT SEL SWEEP EXT SWEEP VERT INPUT 2 V ON EXT SWEEP VERT GAIN VERA WIPER VERT GAIN VERN NOTES 1 LAST REF ND USED NOTES SH 2201 J370 p20 P3801 EXT INPUT ALAIBAGP2 AIAIBA3PI AIAIBABEZ 2430 AMJ824P1 si RS 6118 PART OF THE SPECT ANALY FT PLATE ASSY panne CARRIES THE AIAIBAS SERIES AiAi BASGI ctun a Paso gt swi AIAIBASAICA 85 ALL REF CARRY AN ASSIGNED DEBIGNATOR SSS SERIES e g THIS SCHEMATIC CARRIES SERIES E BS AIAIBAS ATA IBASAZ Ala gasas SPECT Le Y sync x iu Swi AAA ARCS TONE GEN swi THEREFORE R IS DESIGNATED 1 AIBASR 1 Ro ase id SCOPE BLANKING
4. ASSY NOS DLAL GENERATOP 7919 2375 2090 Figure 6 20 Dual tone generator A1A12 schematic diagram sheet 1 of 2 6 49 6 50 blank 11 6625 3016 14 5H 12 SH I 8 SH 1 D SH D hr n y P gt x x xo P 606 5650 9 7 PER c U LED 5 1 EI El E 2 12 cs 15005F 866 1500 5 R8 RIO mum 5V x4A x 1 x 724 5609 5600 Ril RIZ 1 2LF3S 173004053 PUE I B ca R2 R3 470p 309k 50k 047 5 S v DC AT 9 KHz 8 v DC AT ZERO FREQ 1 voc SV RI 3300 RIO Ree 10 47k EL 8 R22 3300 R25 47 ee 999 ASSY 3 DUAL 2700 MECH 557 CUAL TONE GENERATOR N 7005 2375 308 13 1 2 15 2 9 14 6 3 10 7 4 5 7010 2375 200 Je TO gt gt gt N 288 8 128 a 8 25 8 H m FE r 8 5 8 si E 85 5 8 3 28 55 gt u 8 Figure 6 20 Dual tone generator A1A12 schematic diagram sheet 2 of 2 6 51 6 52 blank DRAFTSMAN NOTES ONSHTI 2 8 3 P3101BECOMES Ala AIAS IF MON AUDIO P C 8 0 assy 700 2357 300 NOTES 1 LAST REF NO USED HI ta RIS xi 2
5. MULTIPLER DROMMz 7045 325 600 ag se OI chee E EE S E E E Figure 6 23 1080 MHz multilplier amplifier A1A15 schematic diagram 6 61 6 62 blank TM11 6625 3016 14 FRS 15 13502 N T TO 1200 AMP INPUT CR CRIE DRAFTSMAN NOTES MAS7047 Epp Mad 7047 47047 ON SHT 43501 BECOMES Tul 4 7047 i 45502 i 5 ans 1 LAST REF NO USED 350 AIAGFLI CRIO 6 2 M amp 67047 MA67047 FLI 17 MIXER 3501 13504 J4 q 2ND MIXER 16 Tua CR4 47047 2 ALL REF NO S CARRY AN ASSIGNED MAST947 2 DESIGNATOR SERIES e g THIS SCHEMATIC Get CARRIES SERIES 6 THEREFORE AG I GEN T IS DESIGNATED AIAISCR I eee tia EE T Fisso 7013 2359 700 85 L de dati Mec RS 4 704 MASTOS 47 47 43503 TO 1200 MHz AMP QUTPUT 3600 ai 7260 MHz FILTER DIODE SW assy 7013 2329 700 J Figure 6 24 1200 MHz diode switch A1A16 schematic diagram 6 63 6 64 blank MECH ASSY POWER MONITOR 7008 2373 700 L DRAFTSMAN NOTES ON SHT J360 BECOMES AIAIT JI 43603 43604 MAI P3602 FL3601 AIAITFLI NOTES FL3602 AIAI FLE LAST REF ND USED AIAITATI ATi u2 ATI PI CRI FL2 J4 P2 2
6. EIL eS P ET T E a rm ee 1 I 1 1 140 OUTPUT DIST AMP BD ASSY 1010 2381 900 l T 4 I p 2 l MES md DRAFTSMAN NOTESt TET ON SHT 2301 BECOMES MHP IN TS 2 RMS 303 NOTES 4304 AIA3A5J4 4305 5 5 1302 RES 1 LAST REF USED FU 501 TO q aa TOXCQUTPUT DIST AIA3ASAICA 1 704 2362 000 ud be dt 505 RIS 100 MHz AMP 2 ALL RESISTORS ARE 1 8 W 1096 UNLESS OTHERWISE NOTED 198 MHz MX 1 3 ALL RESISTANCE IS EXPRESSED IN OHMS UNLESS OTHERWISE NOTED AIASASAI 41303 4 ALL REF NO S CARRY AN ASSIGNED DESIGNATOR SERIES rege er e g THIS SCHEMATIC CARRIES SERIES AW3A5 8 FRAT BD Bes THEREFORE RI IS DESIGNATED AIASASARD l PANEL 1 I 11304 I end MIXER once sw RIS 470 1 4 10 i A I pr s Etes 1306 TCXO OUTPUT DIST AMP ASSY 7014 2362 000 Figure 6 10 output distribution amplifier A1A3A5 schematic diagram 6 27 6 28 blank DRAFTSMAN NOTES 150 BECOMES A144 1 41502 4 1801 ATAAFLI NOTES 1 LAST REF NO USED A IA4CRI FL 1 2 RZ 2 ALL REF NO S CARRY AN ASSIGNED DESIGNATOR SERIES e g THIS SCH
7. sof 94 4 4 WIDE MID NARROW B 15 GANGED 2 1R ANT I8 NORMALLY CLOSED CONTACTS OPEN WHEN AJ A 184 18 FULLY CON 8 CONTACT ARRANGEMENT FOR AiAISWS PWR OFF BATT 2a 20 24 24 os 597 s PWR BATT MOMENTARY CONTACT ARRANGEMENT FOR amp 1 x 100 NORV 4 za ct of bg Se 5 a X100 8 CONTACT ARRANGEMENT FOR ALAISW 15 AUTO OFF BATT ws NE AUTO ZERO BATT 9 15414 18 GANGED AND IS NORMALLY CLOSED CONTACTS OPEN WHEN A A IR IS FULLY CCW AtA 18W12 15 GANGED TO AI AIRS AND 15 NOSMALL CLOSED CONTACTS OPEN WHEN 18 FULLY CCW 1i ALL REF NO S CARRY AN ASSIGNED DESIGNATOR SERIES sg THIS SCHEMATIC CARRIES SERIES AIA THEREFORE RESISTOR RI IS ATA IRI 1 5 5 KHz 18 KHz B KH 20 2 10 0 109 w SIGNAL LVL BATT TEST URE FM AUDIO AUDIO 250 TOSCOPE AUDIO FM AUDIO TOSCOPE AUDIO SPKR REC SQUELCH v 5 eae he P O THER BOARD FRE ERAON Mee Uu n 8012 AUTO ZERO OFF BATT f DEVIATION PWR o 3 9 29 24 e elo FRONT PANEL 7005 2577
8. eee E K PRINTED NAME GRADE OR TITLE AND TELEPHONE NUMSER SIGN HERE 2 5 5 Pai SSG I M DeSpiritof 999 1776 eS Le P tone t nu m u anao s21 __ _ gt oe FORK ERE E D FORM 2028 2 CHE VIOUS EDITIONS POE LG m TE WANTS TK 12050 OUR 1201 79 ARE BECOME SOAT GM voc T TO YOUR ADO RECOMMENDED CHANGES TO EQUIPMENT TECHNICAL PUBLICATIONS SOMETHING WRONG wire tats FROM PRINT YOUR UNIT S COMPLETE ADDRESS THEN JOT DOWN THE DOPE ABOUT IT ON THIS FORM CAREFULLY TEAR IT OUT FOLD IT AND DROP IT IN THE MAIL PUBLICATION NUMBER PUBLICATION DATE PUBLICATION TITLE TM 11 6625 3016 14 Test Set Radio AN GRM 114 PIN POINT WHERE TIS THIS space TELL WHAT IS WRONG DATE SENT I NO GRAPH PRINTED NAME GRADE OR TITLE AND TELEPHONE NUMBER D A FORM 2028 2 PREVIOUS EDITIONS P S IF YOUR OUTFIT WANTS TO KNOW ABOUT YOUR 79 ARE OBSOLETE RECOMMENDATION MAKE A CARBON COPY OF THIS AND GIVE IT TO YOUR HEADQUARTERS lt lt lt I TEAR ALONG PERFORATED LINE e Y M 20210 1103 OW 3W 13S8G NUY s51004428 3 0066 ISN 34 SSINI
9. SET PWR OFF BATT SWITCH TO OFF REMOVE 4706 RESISTOR FROM A1A3A5J2 CON 2 TO A1A3A5J2 DISCONNECT FROM A1A3A5J3 CONNECT 4705 RESISTOR FROM GROUND SET PWR OFF TO PWR TCXO and output distribution m Laits AY A3A5 OUT POV DISTRIBUTION AMPLIFIER IS BAD BATT SWITCH TO OFF PERS SHORT A1A3ASFLI TO GROUND CARE FULLY UNSOL DEF WIRE FROM 1 EN REMOVE 4700 RESISTOR AND DISCONNECT COAX CABLES 41 REMOVE PUT DISTRIBUTION AMPLIFIER FROM UPPER FLOOR Y m INSTALL NEW TEXO OUTPUT DISTRI BUTION Aie LIFIER ON UPPER FLGOR __ TN 11 6625 3016 14 p ak YR CAREFULLY SOL DES WIRE TO 1 CABLES LEAVE 45PZ DISCONNECTED 7 amplifier troubleshooting sheet 2 of 4 5 99 TM 11 6625 3016 14 I PUT DISTRIBUTION USE SCOPE WITH 10X PROBE TO MEASURE 10 MHz AMPLIFIER 15 A1A3A533 BAD ss SET PwR QFF BATT SWITCH TO 7 ABOUT k lt 23 ep sons 1 SET PWR QFF GROUND CARE BATT SWITCH FULLY UNSOLDER TO OFF WIRE
10. SWEEP OUT Lise SSE See Se eee Figure 6 27 Spectrum analyzer module no 1 A1A18A1 schematic diagram 6 69 6 70 blank DRAFTSMAN NOTES NOTES ON SHT P3702 BECOMES P4303 1 LAST REF NO USED AIAIBP2 AIAIBA2CII AIAIBAZ2CRS AIAIBAZLI 4 AIAIBA2UI AIAIBA4P3 2 ALL RESISTORS ARE 174 W 10 UNLESS OTHERWISE NOTED 3 ALL RESISTANCE 15 EXPRESSED IN OHMS UNLESS OTHERWISE NOTED AIAIBP AIAIBAGPS 4 ALL REF NO S CARRY AN ASSIGNED DESIGNATOR SERIES 8 9 THIS SCHEMATIC CARRIES SERIES 4141842 THEREFORE Ri IS DESIGNATED AIAIBA2RD ama SCOPE INVERTER ASSY 700 2362 400 24 P4303 200V SWEEP amp SCOPE BLANK VERT OFL VERT DFL HORR DEL HOE DFL 1 22 Sh y c kuu pup NE Igv 150 gt F T 15 d 15 TI NT3652 IW 10 W 10 EACUS moos 11 6625 3016 14 P3702 CRT SOCKET 4 FOCUS 3 CATHODE cs ity INTENSITY T l KV ms 39k N C RIS Fil CONTROL GRID FIL VERT DFL VERT OFL HORIZ DFL HORIZ DFL 490 7 SCOPE INVERTER BD ASSY 7010 2362 400 Figure 6 28 Oscilloscope inverter board A1A18A2 schematic diagram 6 71 6 72 blank NOTES LAST REF NO USED
11. KN BFO TM11 6625 3016 14 Pe RR f Die ve we 10K 2 NOTES AIAIZPI DUAL TONE GEN See TY SPECTRUM ANALY TONE OUT 1 KHz SUM VARI OUT VARI SUM TONE 5 TONE OUT2 VAR TONE KEY EXT SUM GND EXT MOD au TOME FU AM N SELECTED FM FM AUDIO eiv C2ND MIXER REC 2 Les ce qt INT Moo OUT KEY 12 DEMOD Pro AAR 4 ASP 4 FAM CEN AUDIO FM AUDIO wc wt we MM MMMM MMMM Figure 6 3 AN GRM 114 front panel assemby A1A1 schematic diagram sheet 1 of 2 6 11 6 12 blank MOTHER BD AUTO ZERO 19 12 HILYL 36 100 3 TUNER GND 9 39v 3 BATT 28 RELAY COL 33 BATT ON RELAY 3 GEN REC 27 NARROW WIDE a EXT ZERO 3 ANT INPUT LVL LT 26 78 BO g LOCK LT 13 Hi FREO LOCK LT 12 062 PrO 2 HF 2 MOTHER BOARD AIAZP2 LOCK 5v 10 2 live 12 12V oay GEN 5 12v GEN I 5 atl 45v ally 5 53
12. SET SWEEP VER NIER TO CAL Figure 5 6 5 58 TURN ANALY DISPR CONTROL FULLY ccw TO OFF SET INTENSITY CONTROL TO 2 O CLOCK POSI TION ADJUST VERT AND HORIZ CONTROLS TO CENTER THE TRACE ON CRT IS TRACE ON NO CRT YES CONNECT A COAX CABLE TO OUT PUFOF FUNC TION GENERA TOR SH 2 Oscilloscope and spectrum SET PWR OFF BATT SWITCH TO OFF UNPLUG LINE CORD FROM AC OUTLET REFER TO DIS ASSEMBLY ASSEM BLY INSTRUCTIONS TO REMOVE CASE FROM UNIT CAREFULLY RE MOVE CASE PLUG LINE CORD INTO AC OUTLET SET PWR OFF SWITCH PWR VERIFY 12 V dc AT A1A18J1 PIN 1 NO 125 V dc YES SH2 analyzer troubleshooting sheet 1 of 7 CONNECT FREE END OF COAX CABLE TO SCOPE IN JACK SET FUNCTION GEN TO DELIVER A 1 kHz SINE WAVE 20 V p p EXAMINE DISPLAY ON CRT REDUCE OUTPUT OF FUNCTION GENERATOR TO 04 V p p SH 3 SET PWR OFF BATT SWITCH TO 9 NO FF UNPLUG FULL LINE CORD FROM WAVELENGTHS AC OUTLET YES REFER TO DIS ASSEMBLY ASSEM BLY INSTRUC TIONS TO REMOVE CASE FROM UNIT TURN THE UNIT OVER ON ITS RIGHT SIDE SPEAKER SIDE DOWN REFER TO DIS ASSEMBLY ASSEM BLY INSTRUC TIONS TO OPEN THE LOWER FLOOR ASSY PLUG LINE CORD INTO AC OUTLET SET PWR OFF BATT SWITCH TO R ADJUST A1A18A4R40 ON SCOPE MAIN BOARD FOR 9 FULL WAVE LENGTHS TM 11 6625 3016
13. 1 2 K SH 21 RT355 215 K VBW 1 R 36 68 0 vaw 1 L Figure 6 43 100 assembly A2A1 schematic diagram sheet 3 of 3 6 113 6 114 blank By Order of the Secretary of the Army E C MEYER General United States Army Official Chief of Staff ROBERT M JOYCE Brigadier General United States Army The Adjutant General DISTRIBUTION To be distributed in accordance with DA Form 12 51 Operator Maintenance Requirements for AN VRC 12 AN VRC 43 thru 49
14. 14 BOARD AND PUT INA GOOD ONE RESOLDER WIRE TO A1A2 2 PIN 30 CHECK READING ON VOLTMETER WATCH FOR SIGNI FICANT INCREASE RECONNECT A1A14 REGULATOR POWER SUPPLY BOARD RETURN TO START ON SHEET 1 CONTINUE TO DIS CONNECT ASSCM RETURN TO MONITOR 11 V dc BLIES FROM 11V VOLTMETER SHEET 1 LINE CNE AT A TIME FIND Figure 5 3 Power supply troubleshjooting sheet 6 oOf 16 TM 11 6625 3016 14 IS 37 TO Y 44 V dc AT A1A14J1 PIN 7 m tn NO SET PWR OEF BATT SWITCH TO OFF DISCHARGE FIL TER CAPACITORS CHECK WIRING FROM A1A8A1FL4 TO A1A14J1 PIN 9 USING OHM METER REPAIR OR RE PLACE AS NECESSARY RETURN TO START ON SHEET 1 14 REGULA TOR POWER SUP PLY BOARD 15 BAD REMOVE A1A14 BOARD AND PUT IN A GOOD ONE RETURN TO START ON SHEET 1 SET PWR QFF BAII SWITCH TO PWR IS 10 5 TO 13 5 V dc AT A1A14J1 PIN 15 YES NO 14 REGULA TOR POWER SUP PLY BOARD IS BAD SET PWR QFF BATT SWITCH TO OFF DISCHARGE CAPACI TORS RECONNECT WIRE AT A1A2J2 PIN 20 REMOVE A1A14 BOARD AND PUT iN A GOOD ONE RETURN START ON SHEET 1 Power supply troubleshooting sheet 8 of 16 REFER TO MOTHER BOARD INTER CONNECT DIA GRAM MONITOR 12 V dc LINE AT A1A14J1 PIN 15 WITH VOLTMETER
15. Ok ees 7 lt gt 27 CRT BLASS DISPLAY rre I fis HORIZ RAT 9 l 2 ae Cy n TM 11 6625 3016 14 Table 4 5 RF Signal Generator Operating Instructions for RF Signals Continued Step Procedure Illustration Measure peak to peak amplitude in graticule divisions of displayed carrier Record result Apply result obtained in step 7 to the following equation x desired modulation x result of step 7 100 where x number of graticule divisions peak to peak of modulated signal NOTE Steps 9 a and b must be performed simultaneously as one will affect the other a Adjust VERT control to align negative peak of the modulated sig nal with the major horizontal axis b Rotate INT MOD OFF control to adjust peak to peak amplitude of the same modulated signal in graticule divisions to the value of x obtained in step 8 c The signal generator is now cali brated to the desired percent modula tion and is generating at the selected fre quency and output level 4 21 TM 11 6625 3016 14 Table 4 6 RF Signal Generator Operating Instructions for FM RF Signals step Procedure Illustration 1 Return controls and indicators to the settings listed in table 4 3 Then gener ate an rf signal by performing steps of table 4 4 2 Place AM FM switch to FM 3 Set MODULATION FREQ Hz thumb wheels to
16. 5 Remove two Phillips screws 75 and two washers 76 which secure mount ing angle 77 to 1200 MHz Diode Switch High Frequency Multiplier Mixer mounting bracket 30 L figurel 5 46 6 Tag and disconnect coax cables from 100 MHz Filter assembly 37 figure 5 46 7 Tag and unsolder wire from feed thru capacitor on assembly 37 figure 5 46 8 Remove two screws 78 and two washers 79 which secure 100 MHz Filter 37 to mounting angle 77 9 Remove assembly 37 from AN GRM 114 10 Remove one 1 2 Phillips screw 42 and one lockwasher 43 to discon nect frame support member 25 from front panel 44 figure 5 46 11 Remove one 1 4 Phillips screw 38 and one lockwasher 39 and one 1 2 Phillips screw 40 and one lock washer 39 which secure Speaker Assembly Plate Retainer 41 to frame support member 25 5 46 12 Unsolder wires from speaker 13 Remove Speaker Assembly Plate Re tainer 11 from frame support mem ber 25 figure 5 46 14 Tag and Disconnect coax cables from First Mixer Assembly 45 5 46 15 Tag and unsolder wire from feed thru capacitor on assembly 45 figurel 5 46 16 Remove three 7 16 Phillips screws 46 which secure assembly 45 to frame support member 25 5 46 17 Remove assembly 45 from frame support member 25 figure 5 46 18 Use an allen wrench to remove two 5 8 socket head screws 47
17. 5 13 TM 11 6625 3016 14 SET MODULATION FREQ SWITCHES TO 1000 0 Hz SET SWEEP SWITCH TO 1 mS TURN EXT V DIV VERNIER CON TROL FULLY ccw DIS PLAY IS STABLE AND SMAL LER NO Figure 5 14 SET AM EM SWITCH TO AM TURN VERNIER CON TROL FULLY cw TO CAL SET EXT V DIV SWITCH TO 15 KHz ADJUST INT MOD CONTROL FOR 100 AM MODULATION ON CRT SET AM FM SWITCH TO FM CRT DIS PLAY REMAINS STA BLE 5 2 AN GRM 114 performance test sheet 7 of 13 SET AM FM SWITCH TO AM TURN SWEEP SWITCH cew TO OFF DISCONNECT COAX FROM SCOPE IN AND CONNECT TO INPUT OF A FREQ COUNTER SET SWEEP SWITCH TO 1 mS SET AM FM SWITCH TO FM SET WIDE NARROW SWITCH TO WIDE SET MODULATION EREQ SWITCHES TO 0111 1 Hz SET MODULATION FREQ SWITCHES TO 1111 1 Hz SET MODULATION EREQ SWITCHES TO 2222 2 Hz FREQ COUNTER NO READS 2221 08 TO 2222 42 SET MOOULATION FREQ SWITCHES TO TO 3333 3 Hz FREQ COUNTER READS 3332 67 TO 3333 63 Hz SET MODULATION FREQ SWITCHES TO 4444 4 Hz NO FREO COUNTER READS 4443 96 TO 4444 B4 SET MODULATION NO EREQ SWITCHES TO 5555 5 Hz FREQ COUNTER READS 5554 95 TO 5556 06 SET MODULATION FREQ SWITCHES TO 6666 6 Hz NO FREO COUNTER READS 6665 93 TO 6667 26 SET MODULATION FREO SWITCHES TO 7777 Hz
18. 53 Attach RCVR WIDE MID NARROW switch 125 hex nut and washer to Front Panel 44 figure 5 47 54 Solder tagged wires to rear of switch 55 Solder wire to ground lug on back of Front Panel 44 figure 5 47 56 Attach hex nut and flat washer to RCVR WIDE MID NARROW switch 125 on Front Panel 44 5 47 57 Attach GEN RCVR switch 95 lock washer hex nut and flat washer to Front Panel 44 figure 5 47 58 Solder wires to rear of switch 59 Solder wire to ground lug on back of Front Panel 44 figure 5 47 5 171 TM 11 6625 3016 14 5 172 60 61 62 63 64 65 65 67 68 69 70 71 Attach hex nut flat washer lock washer to GEN RCVR switch 95 on Front Panel 44 figure 5 47 Install ZERO RCVR control 94 to rear of Front Panel 44 figure 5 47 Solder wire to control at rear of Front Panel 44 5 47 Attach hex nut flat washer and lockwasher to ZERO RCVR adjust ment 94 on Front Panel 44 Install PWR OFF BATT switch assem bly 93 to mounting screws on rear of Front Panel 44 figure 5 47 Attach hex nut and washer to one mounting screw hex nut lockwasher three terminal lugs washer and spacer on other screw Solder wires to PWR OFF BATT switch 93 at rear of Front Panel 44 figure 5 47 Install TRANS RCVR connector 92 to Front Panel 44 figure 5 47 Attach hex
19. AA342 4 FLBO MECH ASSY ASSY 1200 2200 Met 200 2200 7025 2356 000 57007 63527900 801 PHASE M FROM AGG OUTPUT 4802 INT IN TM11 6625 3016 14 800 DP VC EE UNE LEGS EIE EE GE x See 22 AG 1200 2200 oc ASSY I Toas 2586 000 _ t nise s u ras Z susan r 7 E wH 80 assy 200 2200 MHz 050 gt _ 2555 900 ua eee shaj t 1200 2200 MHz oscillator A1A3A2 schematic diagram Figure 6 7 6 21 6 22 blank TM11 6625 3016 14 H INPUT FROM VCO TUNER J1002 OUTPUT TO 1200 2200 MH2 OSCILLATOR NOTES 1 LAST REF NO USED AA3A3CO DRAFTSMAN NITE 2 CN SHT 4100 BECOMES AJ A3A3J1 1002 100 2 ALL RESISTORS ARE 4 W 10 UNLESS OTHERWISE NOTED 3 ALL RESISTANCE IS EXPRESSED tN OHMS UNLESS OTHERWISE NOTED Tt m OP TANT 4 ALL REF NO S CARRY AN ASSIGNED DESIGNATOR SERES e g THIS SCHEMATIC CARRIES SERIES MAJAS THEREFORE R 16 DESIGNATED pugno et AGC SYST 25 85 7010 2368 600 R29 47k JOS uF 59
20. DISCONNECT ONE ASSEMBLY FROM 12 V dc LINE THEN SET PWB SWITCH TO PWR CHECK READING ON VOLTMETER WATCH FOR SIGNI FICANT INCREASE CONTINUE TO DIS CONNECT ASSEM BLIES FROM 12V LINE ONE AT A TIME TO FIND BAD ONE SH 9 TURN OFF POWER EACH TIME BEFORE DISCONNECTING AN ASSEMBLY LAST ASSEMBLY DISCONNECTED PRIOR TO MAJOR INCREASE ON 11V LINE IS BAD SET PWR OFF BATT SWITCH TO OFF DISCHARGE FILTER CAPACI TORS REMOVE BAD ASSEMBLY AND INSTALL A GOOD ONE RESOLDER WIRE TO A1A2P2 PIN 30 RETURN TO START ON SHEET 1 TURN OFF POWER EACH TIME BEFORE DISCONNECTING AN ASSEMBLY LAST ASSEMBLY DISCONNECTED PRIOR TO MAJOR INCREASE ON 12V LINE IS BAD SET PWB QEE SWITCH TO QEF DISCHARGE FILTER CAPACI TORS REMOVE BAD ASSEMBLY AND INSTALL A GOOD ONE RESOLDER WIRE TO A1A2J2 PIN 20 RETURN TO START ON SHEET 1 MAKE SURE LINE CORD IS PLUGGED INTO AN ACTIVE AC OUTLET SET PWR QEF BAIT SWITCH TO OFF REMOVE A1A8F3 7 BATT FUSE ON REAR PANEL INSERT VOLT METER PROBE TIP FULLY INTO FUSEHOLDER CLIP VOLTMETER PROBE MINUS LEAD TO CHASSIS SET BATT SWITCH TO PWR Figure 5 3 Power supply troubleshooting sheet 9 of 16 TM 11 6625 3016 14 MAKE SURE DC POWER CABLE IS CONNECTED TO REAR PANEL CON NECTOR CONNECT FREE END OF POWER CABLE TO A 12 TO 28 V dc PO
21. Figure 6 29 Spectrum analyzer module no 2 schematic diagram sheet 2 of 3 6 75 6 76 blank TM11 6625 3016 14 al 4 m 1 BISH 1 n 100 D SH2 R56 RSS 3300 1 T 59 R32 5 1 22 RSA 2N3251 5 56h 11 li H P O SAMPLE SWITCH i A RES RSS 1800 5600 I 71403 PISOS e asy T BUFFER I T I 4 w 1 li 22k 4 R46 t 15 PAIE 1 2 2222 R47 7 i 3300 c29 100 J NPO i I 1 D al a Fa D v T ANAL tino waspi 4410 Mer n 5200 1 ANALYZER 80 2 10 2369 I 359 400 a a ya a IM HDD il SPECT ANALY MODULE 2 7030 2363 500 cA Eie ciegas siiis eimi 2 i Figure 6 29 Spectrum analyzer module no 2 schematic diagram sheet 3 of 3 6 77 6 78 blank DRAFTSMAN NOTES NOTES 1 LAST REF NO USED AIAIBA4CII AIAIBASCRIO 4 AIAIBA4LI AIAIBAAQI amp ON SHI 430 BECOMES 44302 44305 AIAIBA4 4S 2 ALL RESISTORS AR
22. Ri SWS 4 AIZAICI 2 12 2 Eg Lt es 3 3 Rit 35v n AIAISASCIS DRI RII E DIAS 9 i R23 x 2 ALL RESISTORS ARE 1 8 W 1096 UNLESS OTHERWISE NOTED 3 ALL RESISTANCE IS EXPRESSED IN GHMS UNLESS OTHERWISE NOTED 4 ALL POLARIZED CAPACITORS ARE TANTALUM 420 IS SELECTED AT TEST FROM THE FOLLOWING VALUES 22 pF NOMINAL 27 pF 8 ALL REF NO S CARRY AN ASSIGNED DESIGNATOR SERIES THIS DRAWING CARRIES 2 ALAIZA 2 THEREFORE Y 15 DESIGNATED AI A 12A2Y I 2 OA RO S GNO Pes al alg 8 3 DRAFTSMAN NOTES Eg S E je 5 al 2 ON SHT 2 2701 BECOMES Le wh S LL eb a IA 2p aay ey a ae AP a 81 B ESTE SS SS 54555 gt H bl rana pas ITE e eb alu a a alu ol u 2 ME FSH 2 MECH ASSY DUAL TONE GENERATOR M 7006 2375 300 EIE ses es te BA E ee ASSY DUAL TONE GENERATOR 36542 700 2374 6 3 Cama TT ES ASSY 2 DUAL TONE GENERATOR LSB 200 2374 900 Bees
23. THEN JOT DOWN THI DOPE ABOUT IT ON THIS CAREFULLY TEAR IT OUT FOLD IT AND DROP IT IN THE DATE SENT 0 July 1977 PUBLICATION NUMBER PUBLICATION DATE i PUBLICS LION T TLE TM 11 5840 340 12 25 Jan 74 Radar Set AN PRC 76 mens w BE EXACT WHERE iT IS IN THIS SPACE TELL WHAT IS WRONG AND WHAT SHOULD DONE ABOUT IT PARA GRAPH FIGURE NO 5 Recommend that the installation antenna alionment procedure be changed throuphont to Q a V IRE antenna lap rather than pee REASON Experience has shown that wi fonis a 19 the antenna servo system is too sensitive to wind gusting in excess of 25 kro s and has tendency to rapidly accelerate and rt hunts cuusing strain to the drive train ing is minimized ty adjusting the lag to 29 without degradation of operation Q Item 5 Function Change 2 db to 3dh g justment procedure the the TRANS POWER calls for a 3 ab 500 watts adjust e TRANS POWER FAULT indioc or REASON Th FAULT in ment to 11 Add new step 1 to Replace cover plate removed step 1 above RE To replace the cover plate On 21 2 change 24 VDC to 5 Zonc REASON This is the output line of the 5 VDC power supply 24 VNC is the input voltage
24. lo 11 12 Install 79 80 MHz Loop Circuit Bead 21 to Mother Board 12 5 46 Install 79 80 MHz Loop Circuit Board enclosure 20 to Mother Board 12 figure 5 46 Install hex nut to coax connector which holds PCB 21 to enclosure 20 Install tagged coax cable to 79 80 MHz Loop Circuit Board enclosure 20 5 46 Attach four slotted four lockwashers 157 to underside of Mother Board 12 which secure 79 80 MHz Loop Circuit Board enclo sure 20 to Mother Board 5 46 Install High Frequency Phase Lock Circuit Board 19 to Mother Board 12 figure 5 46 Install High Frequency Phase Lock Circuit Board enclosure 18 to Mother Board 12 figure 5 46 Install three hex nuts and lockwashers to coax connectors which secure PCB 19 to enclosure 18 figure 5 46 Attach five slotted nuts 153 and lockwashers 17 to underside of Mother Board 12 which secure en closure 18 to Mother Board 5 46 Install tagged coax cables to enclosure 18 figure 5 46 Install tagged coax cables to VCO Tuner Circuit Board 16 5 46 Install VCO Tuner Circuit Board 16 to Mother Board 12 figure 5 46 5 167 TM 11 6625 3016 14 5 168 13 14 15 16 17 18 19 23 24 25 26 Secure VCO retainer 15 to standoff 14 with one Phillips screw 13 Kfigure 5 46 Install Regulator and Power Supply Circuit Boa
25. 1 FOR PURPOSE OF CLARITY NTERCOKNECT ING CABLE ENLS ARE NOT LABLED WITH REFERENCE DESIGNATOR EACH CABLE END HOWEVER CARRIES THE DESIGNATOR SERES AND NUMBER OF ITS MATING JACK EXAMPLES CABLE CONNECTING TD 24 CARRIES DESIGNATOR 1 24 CABLE END CONNECTING TO AJ ATI J CARRIES DESIGNATOR A IAT BOT JACKS AND PLUG DESIGNATORS ARE PROVIDED FOR COMPONENTS ASSEMBLIES WHICH CONNECT USE OF INTERCONNECTING CABLES THESE CONNECTIONS ARE MATES TO ALABAJI PI A1A17JI MATES A L2TAJI PI AIABATI J2 MATES TO A LA P2 SCOPE th 15 SCOPE IN FRONT PANEL ASEY TOO5 23TT 700 TM11 6625 3016 14 6050 0070 880 0 7029 2362600 SEE SCHEMATIC Q 2009 2382 600 BTATIC DISCHARGE PROJECT ASSY on E m jou voso ata dyu 022 2300 200 pee tt a 3 6042 2373 600 ne UT DISCHARGE 3 1 podra cis 1 POWER MONITOR ASSY 7005 2373 700 AIABTATI 5042 2375 SEE SCHEMATIC 60 8 42 SENSOR 900072715200 PAD a 2818 7100 y 1006 2347 000 12 204 P2 m Ja TRANS SEE SCHEMATIC 20 J2 8 20 5 TRANS RCVR 0000 8377 398 PAD PAD 4 49 Mmi 10 REF OUT REF OUT 232 YUU SEE SCHEMATIC O000 2308 00 out 5050
26. 100 Gut PUT OF FUNCTION H tr ttes nr 4 1 VE LOAD 24 T IUCSISTANCE AND 10 Ge _ SETAL i DUE nt NE NE og slve Tte TER i M esse NUI CONNECT Pager Al j VOLTMETER t ADJUST OUTPUT OF FUNCTI N GENERA 110 CXACTUP i rms L PES t nm 1 i A TM 11 6625 3016 14 nets HL oy i i ALL Ort Ta as PES rot BE t MM 100 multimeter troubleshooting sheet 8 of 10 5 109 TM 11 6625 3016 14 Em 7 pee y rms a REMOVE MM 100 PROBE FROM OUT PUT OF FUNCTION GENERATOR SET MM 100 FUNCTION SWITCH TO 2 REMOVE MM 100 PROBE FROM INPUT JACK ADJUST AN GRM 114 CONTROLS AS FOLLOWS Figure 5 12 5 110 St 3 SET SWITCH TO WIDE SET GEN RCVR SWITCH GEN SWITCH TO AM SET SWEEP SET AM EM SWITCH TO 1 mS CONNECTOR OF MM 100 WITH VOLTMETES ADJUST 1 kHz INT MOD CONTROL FOR 50 mV rms ON VOLTMETER UP 100 CONTROL EME LY ASSEM i OY INSTRUCTIONS FO I ADJUST A
27. 20 6 AIA20J7 1 420 8 AIA2OFLI AlAPOFL2 ATA2OFL3 2 4 AIA2OFLS 1 2 SECOND MIXER ASSY 70 2336 200 J 11 6625 3016 14 47047 44905 34904 RCVR 14905 LOIN CR amp MA4TOAT GEN REC COUPLING 14904 40 48 a oto 00 178W 10 n ca Rit 120 41 2 82 5 Cs J4901 5 8W 1 1 8W 1 1 BW 196 FROM VARI 9j ATTENUATOR L peri cre MA47047 n i RI2 SEN REC DIODE 2200 m 1 12V 0 as 4304 H 1 2148 1461 M d AUTO Ma47047 MA47047 zero P 49907 T CRIS 184148 1 MA47047 li N I AUTO ZERO SW J4903 r 10 MHz OUT IIVTE Lo GI Ri6 4905 X 12 MULTIPLIER T 10k CT CRIS F O ORIS 22 CRIE 34902 5 HP 2800 MAGTOAT MA47047 1 OMHz IN See 4900 SECOND MER Assy 701 7 2346 200 Figure 6 33 Second mixer A1A20 schematic diagram 6 87 6 88 blank 11 6625 3016 14 DRAFTSMAN NOTE NOTES uw MU ON SHT 48001 BECOMES AIAZIAIJI 9 E 2 1 LAST REF USED J5002 AIAIFLI 7 500 AIAIFLI c5 AIA2IAICI 2r A AP1A1E1 oue gers L3 L4 AIAEIAIGI I I AIAZ Ale i 45002 AIAZIAILS S pes HI FREQ AIABIAIQ 48
28. Attach case to Front Panel of AN GRM 114 Attach one Phillips screw which se cures case to bottom of Front Panel Attach one Phillips screw which se cures case to top of Front Panel Attach eight Phillips screws and eight flatwashers which secure case to Rear Panel Attach four Phillips screws and four washers which secure black rectangu lar frame to four spacers on Rear Panel Attach black rectangular frame to four spacers Reassembly Attach cable assembly 49 to PCB Assembly 10 by soldering four wires to PCB Assembly figure 5 49 Attach two connectors 46 to Circuit Board 10 figure 5 49 Attach cable retaining plate 48 to bracket 3 with two Phillips screws 47 figure 5 49 Attach Circuit Board 10 to stand offs 9 of Structural Front Panel 11 with three 1 2 screws 8 fig ure 5 49 Attach bracket 3 to Front Panel 7 with two spacers 6 two flat washers b and two 7 16 Phillips screws 4 figure 5 49 Attach bracket 3 to MM 100 case with one 1 4 Phillips screw 1 and one washer 2 figure 5 49 Tighten 1 4 turn fastener which holds right hand side of MM 100 Composite Assembly to MM 100 case 8 Attach metal cover plate to MM 100 accessory compartment by tightening 1 4 turn fastener 9 Slide MM 100 cover onto AN GRM 114 cover then secure by locking latches 5 13 Preparation for storage reshipment or Refer to paragraph 1 ofLchapter 2 for
29. DES 35 v ai v ey 42602 BECOMES 22653 AMIIJS 12604 2 69 GND oF wow LINE ES q Assy TUNER 99 S 42 22 NI 5700 2207 47 209 Wr LINE gt QG LINE BOD LINE x 7455145 DECIMAL DECODER assy VCD TUNER 7010 2342 300 v Res 335 K 882222 a a suysuy Sam s TM11 6625 3016 14 TPI 500 k oh ry 500 2 e 190 2 ca 7 M DOl F Alb 200 e c 1206 AT ATP cuo P pe A3 RANGE Oe now W 2 R26 4700 Se ae K4 mej RANGE 12 ug ns wae 1500 2 10 AM 400 2220 32694 TUNER QUT B o i59 PART OF P2601 T 200 399 400 598 NM 800 799 Figure 6 19 VCO tuner A1A11 schematic diagram 6 47 6 48 blank 11 6625 3016 14 zm pue PES 2900 PCB ASSY NO 2 DUAL TONE GEN 7210 c 2800 PCB DUAL TONE 7010 2374 600 recs NOTES LAST REF USED 173 609055 AIAIBEI
30. REF FREQ SEL Sw 21 COLLECTOR 2 00 I BOO Ma san 2 20 SRE 1 400 250 SCOPE 5 280 SCOPE 2 AN ALOID F 4 AUDIO 06 FILTER 3 T4 200 pue H 25 SIGNAL LVL 35 Y s AIA CIE ONLY T AIABIFLI 100 MM 5 6 190 NARROW WDE J 8 NARROW WIDE 38v n 6 nep 6 AUTO 4ERO OVERRIDE 33 AUTO ZERO OVERRIDE PWR RELAY ia L 18 20k OVER RELAY L 236 160 WAZ FL is M e is rre red T Tara Tn 15 Pres 448 J4 5 me P EE AUSPI T LO SENS i re Spi 606 r 1005 3 v STATIC DISCHARGE 2 PROTECT REG 1 M REC T 1 100 2 eb ISI GEN REC 27 H GEN REC T AIAZFL 21 GEN aagje i TEST G TEST REF ONLY 3 oke _ 5 sus AUDIO amp MP GND RELAY coL 35 b RELAY COL j 05 100 14 4 4 TIMER GND E 3 TINEA GND 1 AIAZBPI D T 260 1 4REF RELAY DRIVER uUa em Sak I 6 BATT 28 xuTRsEnser 3 AIAZFLE4 10 w 18 P 9 10w CREF ONLY 187 MIKER RELAY io 8 OMH eem g 1 LOCKLT TD 5 EXT XMIT T ird 1 AIABFL2
31. ROMIE o E RF OUT 050 0320 660 22 OUTPUT 6050 1200 2200 MHz 087 4537 7025 2556 000 14 SEE SCHEMATIC gf 000 2355 800 2 AGC SYST BD ASSY 7010 2358 600 SEE SCHEMATIC 990 2389 000 6050 0041 970 IN EX GEN IN 004 6050 0041 82C 050 0042 120 23 INT IN TUNE 6050 0041 820 44 TUNER OUT uem 100 2 108 MIXER ASSY 7017 232 1 900 SEE SCHEMATIC 0000 2308 106 60 0 041 at 7 a owe TM 1 8050 0091 220 i IN FILTER 4887 7018 2359 100 SEE SCHEMATIC 0006 2330 000 AAZ CE Gaii BANOPASS FILTER ASSY 7018 2340 200 BEE SCHEMATIC ALAS 0000 2342 100 ja 6050 004 i 220 di 10687 INPUT 6950 0040 970 12 ICOM 100Mhz OUTPUTS our T INPUT 1200 2 200MM La SECOND MIXER ASSY 71 8346 600 SEE SCHEMATIC 0000 2347 500 20 10 IN TUNER BD ASSY 7910 2342 300 SEE SCHEMATIC 0060 4303 890 alari ALS HI FREQ MULTI MIXER BLK ABBY 70 5 2309 700 SEE BCHEMATIC 0000 2308 200 Our c 45 as HET AMP 2 PRESCALER 7024 2322 500 SEE SCHEMATIC 0000 258 500 d 8050 0042 120 j 8050 0044
32. START OF TEST PROCEDURE THE TEST PROCEDURE ILLUS TRATED IS HYPOTHETICAL THE o PROCEDURE IS USED ONLY TO DEFINE FLOW DIAGRAM SYMBOLS AND THEIR USE IN TESTING AND TROUBLESHOOTING PROCEDURES DO NOT ATTEMPT TO PERFORM THESE PROCEDURES ON ANY TEST PROCEDURE FLOW LINE HEAVY LINE AND ARROWHEAD INDICATES DIRECTION OF NO FAULT TEST PROCEDURE FLOW PREDEFINED INSTRUCTION INDICATES SET UP PREDEFINED INSTRUCTION THAT THE PROCEDURE SPECIFIED EQUIPMENT EQUIPMENT AS PERFORMED IS CONTAINED ELSEWHERE SPECIFIED IN 6 10 IN THE MANUAL OR IN PUBLICATION THE MANUAL CONTAINING THE INSTRUCTION OR THE FIGURE CONTAINING THE INSTRUCTION 15 INDICATED IN THE SYMBOL IF A FIGURE 15 REFERENCED IT IS REFERENCED BY FIGURE NUMBER ONLY TEST PROCEDURE INSTRUCTION PROVIDES SINGLE INSTRUCTION FOR PERFORMING SET SWITCH GENERALIZED TEST PROCEDURE VAC ON UNDERSCORE INDICATES SILKSCREEN ON UNIT OR TEST EQUIPMENT __ TROUBLESHOOTING FLOW LINE DECISION INDICATES THAT A DECISION MUST BE MADE INDICATES DIRECTION OF IN ANSWER TO THE QUESTION ASKED THE FLOW FROM TROUBLESHOOTING FLOW THE DECISION SYMBOL IS DEPENDENT ON THE DECISION USING LIGHT LINE AND MADE THE DECISION IS GENERALLY A YES OR NO ARROWHEAD HOWEVER IN SOME CASES THE DECISION MAY REQUIRE A CHOICE OF 3 POSSIBLE ANSWERS SUCH AS HIGH LOW OR NORMAL DOUBLE LINE STEP 1 REPLACE INST
33. This manual describes Test Set Radio AN GRM 114 and contains information for in stallation operation and direct support DS and general support GS maintenance b Repair parts and special tools to sup port the AN GRM 114 are listed in TM11 6625 3016 24P 1 2 Maintenance Forms Records and Reports a Reports of Maintenance and Unsatisfactory Equipment Department of the Army forms and pro cedures used for equipment maintenance will be those prescribed by TM 38 750 The Army Maintenance Management System b Report Packaging and Handling Deficiencies Fill out and forward SF 364 Report of Discrepancy ROD as prescribed in AR 735 11 2 DLAR 4140 55 NAVMATINST 4355 73 AFR 400 54 MCO 4430 3E c Discrepancy in Shipment Report DISREP SF 36 Fill out and forward Discrepancy in Shipment Report DISREP SF 361 as prescribed in AR 55 38 NAVSUPINST 4610 33B AFR 75 18 P4610 19C DLAR 4500 15 1 3 Reporting Equipment Improvement Recommen dations EIR If your AN GRM 114 needs improve ment let us know Send us an EIR You the user are the only one who can tell us what you don t like about your equipment Let us know why you like the design Tell us why a procedure is hard to perform Put it on an SF 368 Quality Deficiency Report Mail it to Commander US Army Communications Electronics Command ATTN DRSEL ME MQ Fort Monmouth New Jersey 07703 We ll send you a reply 1 4 Administrative
34. loo O1 100 00 i lon 4 AI A ABE O A nol o1 O1 ER D TM 11 6625 3016 14 Paragraph Page CHAPTER 5 Preparation for reshipment or limited storage 5 13 5 176 Continued Demolition to prevent enemy use 5 14 5 176 CHAPTER 6 SCHEMATIC DIAGRAMS REFERENCES COMPONENTS OF END ITEM LIST B 1 ADDITIONAL AUTHORIZATION LIST Not Applicable MAINTENANCE ALLOCATION CHART EXPENDABLE SUPPLIES AND MATERIALS LIST Not Applicable PINOUT TABLE FOR EXT ACC CONNECTOR i mH TM 11 6625 3016 14 LIST OF ILLUSTRATIONS Figure Title 1 Test set radio AN GRM 114 2 1 AN GRM 114 packaging AN GRM 114 general block diagram Receive block diagram 3 3 Generate block diagram Frequency error block diagram 1st local oscillator block diagram 3 6 2nd local oscillator block diagram Dual tone generator block diagram Oscilloscope block diagram 3 9 Spectrum analyzer circuit board 1 block diagram Spectrum analyzer circuit board 2 block diagram 3 11 MM 100 multimeter block diagram 3 12 Power supply block diagram AN GRM 114 controls indicators and connectors RF signal generator controls indicators and connectors Oscilloscope controls indicators and connectors Receiver controls indicators and connectors 4 5 Spectrum analyzer controls indicators and connectors Audio generator controls indicators and connectors Frequency error
35. 111 1 MHz 17 dBm TO 21 dBm YES NO MEASURE VOL TAGE AT A1A17FL2 WITH VOLTMETER YES NO RELAY DRIVER A1A25 IS BAD SET REPLACE A1A25 SET PWR OFE BATT SWITCH PWR NOTE LEVEL TM 11 6625 3016 14 SEPARATE 20 dB PAD A1A8AT1 FROM A1A4 AND REAR PANEL LEAVE A1A8AT1 CONNECTED TO A1A17 TRANSMITTER SENSOR 1 4 IS BAD SET PWR OFF BATT SWITCH OFF MEASURE 111 1 REPLACE A1A4 MHz SIGNAL AT SET PWR OFF A1A8AT1J2CR BATT SWITCH WITH SA TO PWR POWER MONITOR A1A17 IS BAD 20 dB PAD A1A8 SET PWR QFF AT1 IS BAD SET BATT SWITCH TO PWR OFF BATT SWITCH OFF REPLACE A1A17 SET PWR QEF REPLACE A1A8 SET PWR SWITCH OFF BATT SWITCH PWR TO PWR PWR Figure 5 8 RF signal generator troubleshooting sheet 8 of 19 5 79 TM 11 6625 3016 14 1199 9 NOTE LEVEL MHz 8 dBm NO MEASURE SIGNAL TO 13 dBm AT A1A16J2 WITH SA YES NOTE LEVEL 1199 9 MEASURE SIGNAL MHz 2 dB TO AT A1A19J3 WITH 5 dB lt AT SA A20J4 1311 1200 MHz DIODE MHz 5 dBm NO SWITCH A1A16 IS TO 13 dBm YES 1ST MIXER A1A19 IS BAD SET PWR OFF BATT SWITCH OFF REPLACE 1 19 SET PWR OFF BATT SWITCH TO R gt 5 80 BAD SET PWR OFF BATT SWITCH REPLACE 1 16 SET PWR OFF BATT SWITCH TO WR PROBLEM y CATED IN 7
36. 14 17 Case c 1 6 Swing Upper Floor out d 1 1200 MHz Diode Case 1 6 Switch A1A16 e 18 23 100 MHz Filter 5 9 High Frequency Multiplier Case c 1 6 Mixer A1A26 e 25 29 Capacitor A1A8C1 e 24 Regulator and Power Supply Case c 1 6 Circuit Board A1A14 f 1 3 Swing Ulpper Floor out d 1 Capacitor A1A8C1 24 Tuner Circuit Board Case c 1 6 1 11 f 4 7 Swing Upper Floor out d 1 High Frequency Case c 1 6 Phase Lock Assembly Swing Upper Floor out d 1 5 151 TM 11 6625 3016 14 Table 5 13 Disassembly Sequence Continued Module to be removed 79 80 MHz Loop Assembly A1A10 250 kHz Monitor Audio Circuit Board A1A13 1080 MHz Multiplier Amplifier A1A15 1200 MHz Amplifier A1A6 High Level Amplifier A1A28 Static Discharge Protector A1A7 108 MHz Bandpass Filter A1A5 Relay Driver A1A25 FM AM Generator A1A24A3 100 MHz Amplifier 108 MHz Mixer A1A24A1 5 152 Module disassembly steps 11 13 14 16 17 20 21 24 25 28 29 32 33 35 36 37 Modules which must be removed first Case Swing Upper Floor out Case Swing Upper Floor out 151 Mixer Case Swing Upper Floor out 2nd Mixer 1st Mixer 250 kHz Monitor Audio Circuit Board Case Swing Upper Floor out 2nd Mixer ist Mixer 250 kHz 1 Monitor Audio Cir
37. 22 Verify that the AN GRM 114 CRT 23 indicates a 4 major division 1 minor division signal display If the sig nal displayed is not correct adjust A1A18A4R7 for the correct indica tion Set the external oscilloscope for 0 01 volt per division the AN GRM 114 EXT V DIV switch to 01 and the INT MOD control for a four major division signal on the external oscillo scope 24 Verify that the AN GRM 114 CRT indicates a 4 major division 1 minor division signal display If the signal displayed is not correct adjust A1 A18A4R7 for the correct indication 25 Set the external oscilloscope for 1 volt per division the AN GRM 114 EXT V DIV switch to 1 and the INT MOD control for a four major division signal on the external oscilloscope 26 27 28 29 30 31 32 33 34 35 11 6625 3016 14 Check that the AN GRM 114 Indicates a 4 major division 1 minor division signal display If the signal displayed is not correct adjust 1 A18A4R7 for the correct indication Set the external oscilloscope for 10 volts per division the AN GRM 114 EXT V DIV switch to 10 and the INT MOD control for a 1 major divi sion signal on the external oscillo scope Check that the AN GRM 114 CRT indicates a 1 major division 1 minor division signal display If the signal displayed is not correct adjust A1 A18A4R7 for the correct indication Repeat steps 20 thro
38. 35 dBm to be achieved Adjustment screw for zeroing FREQ ERROR meter when power is ON Controls RF output level when set is operating in signal GEN mode and beat frequency oscillator bfo injection level when operating in RCVR mode Control knob contains scales for levels in both uV and dBm decibels referenced to 1 3 position switch which activates deactivates auto zeroing circuit and provides a visual indication of internal battery voltage condition as follows AUTO position Auto zeroing circuit is acti vated automatically zero ing receiver and FREQ ER ROR meter through an internal self check OFF position Auto zeroing circuit is deactivated ZERO BATT position When switch is held in this springloaded position a visual indication of internal battery voltage is displayed on DEVIATION KHz WATTS meter BATT green scale 4 3 TM 11 6625 3016 14 Table 4 1 AN GRM 114 Controls Indicators and Connectors Continued Control indicator or connector AUTO OFF ZERO BATT switch Continued TRANS RCVR connector ON lamp PWR OFF BATT switch 4 4 Function NOTE AN GRM 114 should not be used as test set when switch is in this position When activated auto zeroing refer ence pulse will cause minor cathode ray tube crt trace and meter needle deflections to occur this is a normal operating condition and should be disregarded With auto zeroing circuit activated a
39. COMB FREQUENCY Meaning Frequency of 2ND local oscillator determined by value of four rightmost thumbwheels of FREQUENCY MHz subtracted from 1080 0000 MHz 1080 0000 XXXX F Frequency delivered to 1080 MHz Multiplier Mixer Frequency produced within 79 80 MHz Loop Circuit Board de livered to 100 MHz Multiplier 108 MHz Mixer LEFTNMOST DIGIT OF FREQUENCY MHz THUMBWHEELS F 0 or 1 1100 MHz 20r3 1300 MHz 40 5 1500 MHz 6or7 1700 MHz 8or9 1900 MHz Frequency generated by 1200 2200 MHz Oscillator It equals 1200 MHz plus the value of the three leftmost digits of the FREQUEN CY MHz thumbwheels in MHz Frequency generated by 1200 2200 MHz Oscillator as a result of an external voltage control 5 65 TM 11 6625 3016 14 Table 5 8 1st and 2nd Local Oscillators Sheet 2 of 9 Reading Meaning DC voltage sent to 1200 2200 MHz Oscillator from the tuning integrator in the V C O Tuner Circuit Board This voltage con trols the frequency of the 1200 2200 MHz Oscillator Vyco DC voltages sent to the 1200 2200 MHz Oscillator by exter nal dc source Fyco Fe Frequency delivered to Heterodyne Amplifier 2 Prescaler from the High Frequency Multiplier Mixer Frequency sent to the High Frequency Phase Lock Circuit Board from the Heterodyne Amplifier 2 Prescaler Refer to the table of F values For the selected frequency the required power level is 18 dBm to 25 dBm The unse
40. Le 2 3 wonp sync 3 ruvour U v ON ANAL WORD BYNG 18 GND 17 CNTR VERT 12 SWEEP VERN swt wine Hann assy anay ALL RESISTORS ARE 1 4 W 10X UNLESS 7007 2 64 600 OTHERWISE NOTED J N Sa ALL RESISTANCE IS EXPRESSED IN OHMS UNLESS OTHERWISE NOTED vERTICAL SAN switch assy _ 708 2386 200 unio 4 ALL CAPACITANCE 13 EXPRESSED IN UNLESS OTHERWISE NOTED rr 2 l AIAIBASAL sweer switcn assy ___ 0 _ wel k AS Ncc rcd ined NG lt weer switcH assy MEME E di 1 aNaL DISP a 14 GND ANAL VERT HORIZ l ANAL HORIZ ANAL VERT ll v ON ANAL SWEEP IN g LocK P380 4600 1 VERTICAL GAIN SWITCH T7 l3s 2366 800 1 re a E eee eee 1 g LOCK V ON ANAL SWEEP OUT DISP IN AM AUD EXT SYNC iz v TONE a WIRE HARN ASSY SPEC ANALY 700 2364 600 perve amici 3 4400 gt VERI oan jane PLATE TOBB 23
41. UNPLUG LINE CORD FROM AC OUTLET REFER TO DIS ASSEMBLY AS SEMBLY IN STRUCTIONS TO INSTALL CASE Pd Z DES IT 11 6625 3016 14 DUAL TONE GENERATOR IS BAD SET PWR OFF BATT SWITCH OFF pum TO DISASS EMBLY ASSEMBL Y INSTRUCTIONS TO REMOVE DUAL TONE INSTALL GOOD A DUAL GENER ATOR ASSEMBL Y SET PWR OFF BATT SWITCH TO PWR SH 2 5 93 TM 11 6625 3016 14 MAKE SURE 10 159 W ATTENUA TOR IS DISCON NECTED FROM IN PLUG EXTENDER BOARD NTO MOTHER DAND CONNEC TGS i REAL unten mE Seca CT OUTPUT UNPLUG LINE PLUS de FROM AC BOARD PUITS C X I TENDER BORKU sb at ms 6 s REFER DIS ELUG LINE CORD THE TRANS ASSEMBLY IN INTO AC GUTI ET MITTER DO STRUCTIONS TO SET fi i APPLY MODULA REMOVE CASE TOR FROM UNIT a HEAD FORWARD POWER SHOWN ON THRULINE WATTMETER CASE RE ADJUST A1A14R32 ON REGULATOR POWER SUPPLY BOARD TO ZERO THE DEV PWR METER READ POWER ON DEV PWR METER SCALE RAISE UPPER FLOOR ASSEMBL Y REMOVE 1 14 REGULATOR POWER SUPPLY BOARD FROM MOTH
42. la27P2 2 ALL POLARIZED CAPACITORS ARE TANTALUM 3 ALL REF CARRY AN ASSIGNED DESIGNATOR SERIES e g THIS SCHEMATIC CARRIES SERIES THEREFORE Ri 19 DESIGNATED ABRI ALAR 1 MOTHER BOARD 7005 2363 701 s TM11 6625 3016 14 4 F D REF FRONT PANEL mm PZO 250 MONITOR CIRCUIT BOARD FRONT PANEL REF FRONT PANEL VOD TUNER REF HI FREQ MULTIZ MIXER E 7 47 800 999 MHE 2 1300 FROM POWER R 600 789 13 00 Fe AUDIO 3 2 FM AUDIO 400 599 12 31500 i tue EMITTER r AUTO ZERO A 220 N 21200 MHz FILTER 200 399 11 2 1300 FM AUDIO SCOPE 34 FM AUDIO SCOPE BASE te gee 6 4 DIODE Sw i ABC ADD 6 AGC SOLLEGTOA her oncy Beige Wie ote Yon SQUELCK SOQUEL CH doo SQUELCHLT 10 26 SQUELCHLT ony AIAZ 92 1 EXT ZERO EXT ZERO SOURCE m AUDIO 12 7 AUDIO AMP Lrois 23es 100 v m AUDIO SPRR 13 84 AUDIO SPKR EMITTER 31 ALAR Pat 22 BASE KK a
43. 1080 MHz Mutiplier Amplifier A1A15 250 KHz Monitor Audio A1A13 FM AM Generator A1A24A3 a High Frequency Multiplier Mixer A1A26 b VCO Tuner A1A11 5 High Frequency Phase Lock A149 tag and remove plug A1A9P3 from jack A1A9J3 6 Attach SMB tee adapter to jack A1A9J3 on High Frequency Phase Lock 9 7 Attach plug A1A9P3 removed step 5 to the tee adaptcr 8 Connect coaxial cable between the SMB tee adapter at A1A9J3 and the SCOPE IN connector on AN GRM 114 front panel 9 Set the oscilloscope controls for a display of 0 to 8 V dc 10 On VCO Tuner A1A11 set A1A11R3 fully cw Measure and record the dc level displayed on the oscilloscope 5 113 b TM 11 6625 3016 14 Table 5 10 AN GRM 114 Assemblies and Interactive Assemblies Continued Assembly Power Monitor 1 17 Spectrum Analyzer 1 18 First Mixer A1A19 Second Mixer 1 20 100 MHz Filter A1A21 100 MHz Amplifier 108 MHz Mixer A1A24A1 120 MHz Receiver A1A24A2 FM AM Generator A1A24A3 High Frequency Multiplier Mixer A1A26 VCO Tuner A1A11 Alignment VCO Tuner A1A11 is aligned using the following pro cedure 1 Remove all power from the AN GRM 114 and disassemble the unit to gain access to the VCO Tuner 1 11 module Then apply power to the AN GRM 114 2 Set the FREQUENCY MHz thumb wheels to 0000000 3 On 1200 2200 MHz Oscillator A1A3 A2 tag and remove plugs A1A3A2P4
44. 2 STATIC PROTECT ASSY 7022 2360 200 SEE SCHEMATIC 0000 2345 200 7008 2343 70 SECOND MIXER 010 2346 600 SEE SCHEMATIC 0000 2347 500 HI FREQ MULTI MIXER BLK ASSY 7015 2309 700 BEE SCHEMATIC 0090 2308 200 AlA268 1 20 REGULATOR amp POWER SUPPLY PC 8D assy 7010 2342 300 SEE 0000 2387 0 MIGH FREQ f LOCK PG BO BO ASSY 7010 2348 300 78 80 MHz LOOP PC BD assy 7010 2342 400 250kH1 IF MON AUDIO BOARD 7010 2357 300 VGC TUNER PC BD A88 Y 7010 2342 300 SEE SCHEMATIC Q000 2303 806 SEE SCHEMATIC 0000 2334 500 SEE SCHEMATIC 0000 2342 500 SEE SCHEMATIC 0000 2360 502 MOTHER BOARD ASSY 2006 2343 701 SEE 0000 2382 700 TM11 6625 3016 14 Pro 7005 23380 001 P O 7003 7624 500 REAR PANEL 7005 2338 001 SEE SCHEMATIC 9000 2340 301 BATTERY MODIFIED 7008 7624 500 SEE SCHEMATIC 0000 2162 500 23 BISH 2 A GH 2 Figure 6 2 AN GRM 114 interconnect A1 diagram sheet 1 of 2 6 7 6 8 blank 1 ALSH 13 COH 1 P O FRONT 2557 wT RO 120 MHz RCVR 7027 2348 300 SCHEMATIC 0000 2348 100 4142442 1209 MN1 ASSY 1080 MHz MULT aggy
45. 63 figure 5 46 Tag and unsolder wires from feed thru capacitors Remove two 3 8 Phillips screws and two lockwashers from underside of Mother Board 12 which secure High Level Amplifier 63 to Mother Board figure 5 46 Remove High Level Amplifier 63 from Mother Board 12 5 46 Remove two 1 4 Phillips screws and two lockwashers from underside of Mother Board 12 which secure static Discharge Protector 35 to Mother Board figure 5 46 Tag and disconnect coax cables from assembly 35 figure 5 46 31 Tag and unsolder wire from feed thru capacitor 32 Remove assembly 35 from Mother Board 12 figure 5 46 33 Tag and remove coax cables from 108 MHz Band pass Filter Assembly 71 5 46 84 Remove four 7 16 Phillips screws four lockwashers and four spacers which secure 108 MHz 5 Fil ter 71 to underside of mounting bracket 30 figure 5 46 35 Remove 108 MHz Bandpass Filter 71 figure 5 46 36 Remove two 5 16 Phillips screws 68 and two lockwashers 69 which secure Relay Driver Circuit Board 70 to underside of Mother Board 12 figure 5 46 37 Unplug Relay Driver Circuit Board 70 from connector and remove circuit board figure 5 46 g Removal of Assemblies from Lower Floor 1 Remove two screws 155 and two washers 156 which secure frame support member 53 to Front Panel 44 and Rear Panel 58 figure 5
46. ALL REF NO S CARRY AN ASSIGNED DESIGNATOR SERIES e g THIS SCHEMATIC CARRIES SERIES AIAI7 THEREFORE CRI IS DESIGNATED A AITCRD 3800 MECH ASSY POWER MONITOR 7005 2373 7000 8 FL3602 T J3604 STATIC DISCHARGE Figure 6 25 TM11 6625 3016 14 Power monitor A1A17 schematic diagram 6 65 6 66 blank AIAIBAI 6050 0040 620 SPECT ANALY MODULE ASSY 4 7030 2363 200 9 T come ri 6050 0040 720 AIAIBAIFLI NIMES T test Y A AI8AIPI AIAIBAS SI PART OF 7007 2564 600 PART OF 7007 2564 600 els gt AIAIPI AIAIBAA EXTINPUT 212 OSCILLOSCOPE 1 8 5 531 s 3 MAIN P C BD ASST SPECT ANALY FT PLATE ASSY 166 900 7010 2562 500 AlAIGAS AIAIBA3JZ SPECT ANALY ASSY 2 7030 2363 300 AIAIBA3JI AIAIBASPI AIAIBAAa J3 AIAIBA4P3 TM11 6625 3016 14 PART OF 7000 2563 400 AIAIBA2 OSCILLOSCOPE INVERTER BD ASSY 700 2362 400 AIAIBVI AIAIBP2 Tae 57 71 SPECTRUM ANALYZER 7029 2362 600 Figure 6 26 Spectrum analyzer A1A18 schematic diagram 6 67 6 68 blank 2359 300 7500 23 eS eue spect analy MODULE ASSY EPECT ANALY PCED l NOTES 1 LAST REF NO USED AIAIBAIFLE 94 AIAIBAIAIC3 RSI RTI 15 x5 Q9 vr YFLI 2 LL RESISTORS ARE 4W 10 UNLESS OTHERWI
47. Continued Step Procedure 8 a If generated signal is aligned with Cont major vertical axis frequency of detected spurious signal is equal to setting of FREQUENCY MHz thumbwheels b If generated signal is not centered over major vertical axis note position of generated signal on crt graticule place GEN RCVR switch to RCVR and increase or decrease setting of FRE QUENCY MHz thumbwheels to align spurious signal to same position to which the generated signal was pre viously aligned The setting of FRE QUENCY MHz thumbwheels repre sents frequency of detected spurious signal 9 Emergency operating procedures Refer to the emergency operating procedures in step 9 ofl table 4 10 and inltable 4 2 10 Stopping procedures Refer to the stopping procedures in table 4 2 4 8 Audio Generator Operating Instructions When the AN GRM 114 is used as an audio genera tor the operation can be accomplished by either the use of the MM 100 to measure the audio signal level and match the impedance of the UUT or through the use of the oscilloscope as the audio signal level monitor Therefore two procedures 4 48 Illustration ANALY DISPR OFF CRT DISPLAY are presented Table 4 14 lists the initial adjust ments and control settings necessary to generate an audio signal Table 4 15 lists the operating instructions using the MM 100 and lists the operating instructions using the oscilloscope Reference No 1
48. DRAFTSMAN NOTES AIAIBASFLE A AIBASJ3 AlAIBA3AICAZ AlAIBASAICR AIAIBASAIEG AIAIBASAILE AIAIBASAIQIA AIAIBABAIRIT AIAIBABAIT2 AIAIBASAIXII AIAIBASALYI 2 ALL RESISTORS ARE 1 8 W 9X UNLESS OTHERWISE NOTED 3 ALL RESISTANCE IS EXPRESSED IN OHMS UNLESS OTHERWISE NOTED 4 ALL CAPACITANCE 15 EXPRESSED IN PICOFARACS UNLESS OTHERWISE NOTED 5 ALL REF NO S CARRY AN ASSIGNED DESIGNATOR SERIES e g THIS SCHEMATIC CARRIES SERIES AIAIGAS 4 AIAIBASAR THEREFORE 15 DESIGNATED AIAIBASAIRD ON SHT 4410 BECOMES AIAG ASI J4102 9403 AIAIBASUS AIAIBASFLE FL4IO2 AIMSASFLZ 7 4103 AIAIBASFLS AIAIBASFLA 7 4105 AIAIBASFLS FL4106 AAIBABFLE SPECT ANALYZER P C BD ASSY 2 700 2359 4900 AIAIBAS 1 I SPECT ANALY MODULE ASSY 2 7030 2363 300 7 HORIZ SWEEP 2 IE F 12 v FOR ANAL T IAOW I OW 1 20v ADU ien ys s DY 77 Figure 6 29 11 6625 3016 14 Spectrum module 2 A1A18A3 schematic diagram sheet 1 of 3 6 73 6 74 blank TM11 6625 3016 14 T y cia DETECTOR QRS 0 400 R26 2200 ais au CRE FOL T 50k SF w ST 2 _ 470 MS
49. HI LVL uV x 100 NORM switch 85 on Front Panel 44 figure 5 47 Attach hex nut flat washer and lock washer to DEV PWHR control on Front Panel 44 figure 5 47 Attach DEV PWR knob 84 figure 5 47 Use an Allen wrench to tighten two 1 8 socket head screws which hold DEV PWR knob 84 to Front Panel 44 Install ANT INPUT connector 82 to Front Panel 44 figure 5 47 87 88 89 90 91 92 93 94 95 96 97 98 99 Attach tagged coax cable to rear of connector Attach hex nut to rear of Front Panel 44 which holds ANT INPUT connector 82 to Front Panel 5 47 Install Frequency Select Switch 78 to Front Panel 44 figure 5 47 Attach four hex nuts 75 four lock washers 76 and four flat washers 77 which hold switch mechanical assembly 78 to Front Panel 44 Connect two multi pin plugs to PCB 79 5 47 Install DEVIATION KHz WATTS meter 80 to Front Panel 44 figure 5 47 Attach two screws which hold DE VIATION KHz WATTS meter 80 to rear of Front Panel 44 Install terminal lugs on rear of meter with two hex nuts 5 47 Install FREQ ERROR KHz meter 81 to Front Panel 44 figure 5 47 Attach two screws which hold FREQ ERROR KHz meter 81 to rear of Front Panel 44 figure 5 47 Install terminal lugs on rear of meter with two hex nuts Install Modulation Freq Hz D
50. INTO EXTENDER BOARD TM 11 6625 3016 14 USE OHMMETER TO ISOLATE PRO BLEM REPAIR OR REPLACE AS NECESSARY PLUG A1A14 BOARD INTO EX TENDER BOARD Figure 5 10 RF wattmeter troubleshooting sheet 4 of 4 5 97 TM 11 6625 3016 14 START PRESET CON PLUG POWER CHECK OUTPUT TROLS PER CORD INTO AN LEVEL OF 10 MHz A1A3U1 TCXO TABLE 5 3 ACTIVE AC TCXO AT IS BAD OUTLET A1A3A5J1 MEASURE LEVEL USING SPECTRUM ANALYZER CHECK 11 V de DISCONNECT COAX UNPLUG LINE AT TCXO NO CONNECTOR CORD FROM TOR A1A3U1P3 10 dBm A1A3U1P2 FROM OUTLET PIN 1 A1A3U1J2 UNPLUG ATA3U1P3 YES REFER TO DIS REMOVE TCXO ASSEMBLY ASSEM YES EROM UPPER BLY INSTRUCTIONS 11 05 V dc OUTPUT DISTRIBU INSTALE TO REMOVE CASE TION AMPLIFIER TCXO NO CONNECT COAX NO AT A1A3U1J2 AND CONNECT A1A3U1P3 TO A1A3U1J3 RAISE THE A1A3 UPPER FLOOR ASSEMBLY 15 25 V dc YES SET LEVELS OF TCXO PRIOR DISTRIBUTION PWR CAREFULLY CHECK FOR OBVIOUS SIGNS OF DAMAGE SH 2 Figure 5 11 TCXO and output distribution amplifier troubleshooting sheet 1 of 4 5 98 CONNECT ATA3A5P1 TO 1 DISCONNECT A1A3A5P2 FROM 2 CONNECT A 4709 RESISTOR FROM A1A3A5J2 TO GROUND USE SCOPE WITH 10X PROBE TO MEASURE 10 MHz LEVEL AT A1A3A5J2 Figure 5 11
51. OUTPUT DISTRIBU BATT SWITCH 2 3 V SOLDER WIRE TO TION AMPLIFIER ATASASFLA 29 IS BAD YES REMOVE 4702 RESISTOR FROM A1A3A5J4 CONNEC SET PWR OFF BATT SWITCH TO OFF CONNECT COAX CABLES LEAVE A1A3A5P5 DIS CONNECTED DISCONNECT REMOVE 4702 SHORT A1A3ASFL1 RESISTOR FROM TO GROUND CARE FROY A1A3A5J5 CON FULLY UNSOLDER NECT A1A3A5P5 WIRE FROM TO A1A3A5J5 A1A3ASFL1 TCXO AND TCXO CONNECT A 470 OUTPUT DISTRIBU RESISTOR FROM TION AMPLIFIER DIS CONNEET 5 TO ARE WORKING DOES GROUND NORMALLY REMOVE 47052 REMOVE TCXO OUTPUT DISTRIBU TION AMPLIFIER FROM UPPER FLOOR ASSEMBLY INSTALL NEW TCXO OUTPUT DISTRIBU TION AMPLIFIER LEVEL AT ON UPPER FLOOR A1A3A5J5 ASSEMBLY USE SCOPE WITH X10 PROBE TO MEASURE 10 MHz Figure 5 11 TCXO and output distribution amplifier troubleshooting sheet 4 of 4 5 101 TM 11 6625 3016 14 ASSEMBL Y RE ASSEMBLY IN STRUCTIONS TO OPEN MM 100 AD JUST A2ATA1R96 ON MM 100 CKT BD FOR 99 READING METER READS oo UNPLUG MY 100 INTERCONNE CABLE FROM AN GRM 114 EXT ACCJACK USE A METER TO VERIFY 12 V dc FROM PIN 1 TO PIN 9 OF EXT ACC JACK CLIP LEAD ALLIGATOR CLIP TO PROBE TIP 125 V dc DISCHARGE 150 CAPACITOR A2A1A1C47 ON MM 100 CIRCUIT BOARD UNCLIP LEAD A
52. PES pore 5 oe Rear Sos R 1 7 250 c29 uu ix 412 c29 24 pem uw zm RAG OMS IR 844 _ CRI 4549 R45 ROA L Ree nea e EST R FAST 8 Li RQ HR cen CR5 Cle Sw RF DEC 210 L 4 e W Da BEES TAI NN AE 5 fr pn 1 X dk WH ege qox Figure 5 45 MM 100 assembly 2 1 1 TM 11 6625 3016 14 Table 5 13 Disassembly Sequence Module Module disassembly removal Module to be removed steps Modules which must be removed first steps Heterodyne Amplifier Case c 1 6 2 Prescaler A1A3A1 d 2 5 Swing Upper Floor out d 1 1200 2200 MHz Oscillator Case c 1 6 2 d 6 10 Swing Upper Floor d 1 AGC Circuit Board d 8 9 AGC Circuit Board d 8 9 Case c 1 6 A1A3A3 Swing Upper Floor out d 1 TCXO Master Oscillator Case c 1 6 A1A3U1 d 11 14 Swing Upper Floor out d 1 TCXO Master Oscillator Output Distribution Amplifier Case c 1 6 A1A3A5 d 15 17 Swing Upper Floor out d 1 Clock Divider A1A3A4 d 18 20 Case c 1 6 Swing Upper Floor out d 1 2nd Mixer A1A20 e 1 4 Case C 1 6 Swing Upper Floor out d 1 100 MHz Filter A1A21 e 5 9 Case c 1 6 Speaker e 10 13 Case C 1 6 1st Mixer A1A19 e
53. Remove frame from stand Offs 3 Remove eight Phillips screws and eight flat washers which secure case to rear panel 4 Remove one Phillips screw which secures case to top of front panel 5 Remove one Phillips screw which secures case to bottom of front panel 6 Slide case away from front panel off AN GRM 114 Removal of Assemblies from Upper Floor 1 Remove two Phillips screws 1 and two washers 2 which secure Upper Floor Assembly 3 to frame support members 4 and 129 figure 5 46 Swing out Upper Floor Assembly 2 Tag and unsolder wires from feed thru capacitors of Heterodyne Amplifier 2 Prescaler 5 figure 5 48 3 Tag and disconnect coax cables from assembly 5 5 48 4 Remove two Phillips screws 2 two lockwashers 3 and two spacers 4 which secure assembly 5 to Upper Floor 6 figure 5 48 b Remove assembly 5 from Upper Floor 6 figure 5 48 6 Tag and unsolder wires from feed thru capacitor of 1200 2200 MHz Oscillator 11 figure 5 48 TM 11 6625 3016 14 7 Tag and disconnect coax cables from assembly 11 figure 5 48 8 Remove two 5 16 Phillips screws 7 and two lockwashers 8 from AGC PCB mounting bracket 9 figure 5 48 9 Remove bracket 9 with AGC 10 from 1200 2200 MHz Oscillator Assembly 11 figure 5 48 10 Remove four Phillips screws 1 four lockwashers 36 which secure assem bly 11 t
54. Repair Inspect Replace Inspect Test Test Replace Test Repair Test Repair Inspect Install Replace Test Adjust Replace Repair Test Replace Repair Test Replace Inspect Test Repair Inspect Replace MAINTENANCE CA TEGORY TM 11 6625 3016 14 3 8 14 21 23 24 3 4 8 14 21 22 23 24 28 29 24 3 4 8 14 21 22 23 23 28 29 24 Visual 24 Visual 3 4 6 8 14 19 24 3 4 6 8 14 19 24 33 35 24 3 0 6 8 14 19 24 33 35 24 3 4 6 8 14 19 24 33 35 24 Visual 24 24 1 3 4 5 6 8 16 24 1 2 4 5 6 8 16 24 24 24 1 2 4 5 6 8 16 24 24 24 1 2 4 5 6 8 16 24 43 24 Visual 4 24 24 Visual 24 TOOL OR TEST EQUIPMENT REF CODE TM 11 6625 3016 14 27 28 29 30 31 32 33 34 35 MAINTENANCE CATEGORY H D H D 0 0 HC h D CONNECTOR BNC TEE IFR 2105 1410 900 51190 TOOL AND TEST EQUIPMENT REQUIREMENTS SECTION III TEST SET RADIO ANGRM 114 NATIONAL NATO NOMENCLATURE STOCK NUMBER TOOL NUMBER OSCILLOSCOPE 05 262 6625 01 007 9416 FREQUENCY COUNTER TD 1225A 6625 01 103 2958 SPECTRUM ANALYZER IP 1216 U PLUG IN RF TUNER PL 1400 U PLUG IN IF PL 1388 U 6625 00 424 4370 6625 00 422 4314 6625 00 431 9339 DIGITAL MULTIMETER AN USM 451 6625 01 060 6804 DISTORTION ANALYZER AN URM 184A 6625 00 802 8718 FUNCTION GENERATOR SG 1133 U 6625 01 028 4989
55. SH9 REPLACE A1A14 REGULATOR POWER SUPPLY BOARD SH 9 5 31 TM 11 6625 3016 14 SET PWR OFF BATT SWITCH TO BATTERY VOLT OFF UNPLUG AGE TOO LOW TO POWER CORD OPERATE UNIT FROM AC OUTLET REPLACE A1A8F3 1 12 FUSE SWITCH HOLD DOWN AUTO ZERO BATT SWITCH AND READ BATT VOLTAGE RE LEASE SWITCH HOLD DOWN AUTO ZERO BATT READ BATI VOLTAGE ON TOP SCALE OF DE VIATION METER PLUG POWER CORD INTO AN ACTIVE AC OUTLET ALLOW 2 HOURS FOR INTL BAT TERY TO CHARGE YES PRESS PWR OFF UNPLUG LINE BATT SWITCH TO CORD FROM AC B OUTLET SH13 YES SET PWB OFF BATT SWITCH TO OFF DISCHARGE FIL TER CAPACITORS USE OHMMETER TO ISOLATE PROBLEM Figure 5 3 Power supply troubleshooting sheet 12 of 5 32 BATTERY IS BAD REMOVE BATTERY AND INSTALL A GOOD ONE REPAIR OR RE PLACE AS NECESSARY INSTALL A1A14 REGULATOR POW ER SUPPLY BOARD REMOUNT A1ABA1 D C R TO REAR PANEL ASSY UNIT TM 11 6625 3016 14 PROBLEM WITH YES TURNS NQ A1A14 REGULA Revie oie OFF IN6 TO TOR POWER 10 SUPPLY BOARD MIN SET PWR OFF ET PWR OFF BATT SWITCH TO SET PWR OFF a ATT SWITCH TO OFF UNPLUG BATT SWITCH TO OFF IF BATT FF UNPLUG CINE CORD OFF is CINE CORD FROM FROM AC OUTLET C OUTLET YES REMOVE BAD TIMER REMOVE BAD ASSY AND INSTALL A e NO
56. THEN TO OSCILLOSCOPE INVERTER CIRCUIT BOARD THEN TO CRT HORIZONTAL DEF LEC TION PLE TES Figure 3 9 Spectrum analyzer circuit board 1 block diagram 3 15 TM 11 6625 30163 14 ROM 145 6 AMES 7 conr lt a POTE D MT D 2 RU 1 C 6A000 125 H7 PHASE 16384 e wer x DETECTOR ANAL PER iz OSCILLATOR CIRCUIT Extr EM TERT EOAHLD 1 LOCKING BIAS MHS 75 MH V C Qu 1 i MHz SSS 4 OSCILLOSCOFE FROM MAIN CIRCUIT _ Le AMP iom DETECTOR M BOARD IVERTICA ANALY ZEN DEFLECTION CIRCUIT 2 d Elm m enim AMPLIFIER BOARD 1 Figure 2 10 Spectrum analyzer cireuit board 2 biock diagram 4 DEMOD THANSF ORNEH DETECTOR t e S UT AGC CIFCULT nae 1452 AFC CIRCUIT ta WE M CMS V AMPLIFIER i i 1 un 7 k i M HES t 5 lathe os i i vents 777 On RR quM AC IMPEDANCE pokes Ce MATCHING 6o x L add CIRCUITS eae ERIS Figure 3 11 100 Multimeter block diagram 3 16 e When the FUNCTION control is in the positi
57. TM 11 6625 3016 14 Figure 4 6 Audio generator controls indicators and connectors Table 4 14 Audio Generator Initial Adjustments and Control Settings INT MOD OFF control 1 KHz INT MOD OFF control MODULATION FREQ Hz thumbwheels ANALY DISPR OFF control FUNCTION switch MM 100 RANGE switch MM 100 Control indicator or connector Initial adjustment or setting Fully detent OFF Fully detent OFF 0000 0 HZ Fully ccw detent OFF HI Z 300 4 49 TM 11 6625 3016 14 Table 4 15 Audio Generation with MM 100 Operating Instructions Step Procedure Illustration 1 Connect one end of coaxial cable to INT MOD OUT connector and opposite end of cable to the INPUT jack of MM 100 INT MOD OUT 2 Determine the input impedance of the unit to be tested and determine the level of the audio signal to be inserted into the UUT TM 11 6625 3016 14 Table 4 15 Audio Generation with MM 100 Operating Instruction Continued Step Procedure Illustration Set the FUNCTION switch to the setting which corresponds with the impedance Of the UUT 113 1 x x S b Paya OS X AN EP Ne I Uv 21 Ls Ze y JUS a NN FUNCTION 4 Set the RANGE switch to audio signal level to be injected into the UUT 4 51 TM 11 6625 3016 14 Table 4 15 Audio Generation with MM 100 Operating Instructions Continued Illustration S
58. TM 11 6625 3016 14 MONITOR A1A9J3 WITH VOLTMETER CHANGE MHz SWITCHES TO 100 000 0 USE EXT D C TO VARY ABOVE AND BELOW 1300 MHz 48 YES 7 dim e lt ok AT I O MEASURE SILNAL AT WITH SA MEAS HE SIGNAL AT ATAJ WITH SA M N 10 2 gt 5 d m O 5 chm ATAZSASJA 7 NO PROBLEM INDICAT ED WITH MASTER OSCILLATOR OUT PUT DISTRIBUTION AMPL TURN POW REPO Re 1 2 INPUTS VEAS FREQ PHAS PROPER M NO PROBLEM INDICAT ED WITH FREO SELECT SWITCH TURN POWER OFF REPLACE A1A27 TURN POWER NEL PROBLEM INDICAT EO WITH MIXER TURN POWER OFF HE PLACE TURN POWER ON ED WITH HIGH FREQ PHASF LOUK BD TURN POWER OFF REPLACE TURN POW E Do Figure 5 8 RF signal generator troubleshooting sheet 17 of 19 5 88 MONITOR 1 1 14 WITH OSCILLO 5 USE TERNAL D C VARY F vco ABOVE AND BE 2 VOLTAGE A1A11J4 SHOULD INCREASE TO 65 TO 7 5 V AS F vco INCREAS ES TO 1300 MHz DOES IT VOLTAGE AT A1A11J4 SHOULD DECREASE TO 2 5 V 3 5 V de AS F vco DECREAS ES TO 1300 MHz PROBLEM INDICAT ED V C O TUNER BD TURN POWER OFF REPLACE A1A11 T
59. TO OFF SET GEN RCVR SWITCH TO RCVR CONNECT A COAX CABLE BETWEEN INPUT OF ATTEN amp OUTPUTOFA TRANSMITTER 150 W MAX KEY THE TRANS MITTER DO NOT APPLY MODULA TION READ DEV PWR METER SET R VR WIDE NARROW SWITCH TO NARROW SET FREQUENCY MHz SWITCHES TO 111 000 0 SET DEV PWR SWITCH TO WATTS X10 10 SET DEV PWR METER TO X1 ore Figure 5 2 AN GRM 114 performance test sheet 9 of 13 5 16 READS SAME AS EXT WATT METER 11096 UNKEY AND TURN OFF POWER TO TRANSMITTER REMOVE COAX CABLES FROM WATTMETER ATTEN AND TRANSMITTER CONNECT COAX CABLE BETWEEN INT MOD OUTPUT AND SCOPE IN JACKS ET MODULATION EREQ SWITCHES TO 000 0 Hz SET EXT V DIV SWITCH 1 SET SWEEP SWITCH T 1 ms ADJUST INT CONTROL FOR A SINE WAVE 3 MAJOR DIV IN HEIGHT ON CRT SET 100 SWITCH TO 3 YOLTS SET MM 100 EUNC TION SWITCH TO Hz DISCONNECT COAX CABLE FROM SCOPE IN JACK amp ECT TO IN PUT JACK OF TM 11 6625 3016 14 ADJUST INT MOD CONTROL FOR ACTLY 1 V rms ON 100 METER SET 100 EUNC TION SWITCH TO SET MM 100 EUNC SET 100 TION SWITCH RANGE SWITCH 600 TO 3 VOLTS METER METER READS NO READS 837 TO 1 023 126 TO 168 Vrms Vrms YES gt s SET MM 100 SET MM 100 FUNC SWITCH TO TION SWITC
60. TURN POWER OFF RE PLACE 15 TURN POWER ON PROBLEM INDICAT ED WITH iNDICA TOR LAMP CHECK MEASURE SIGNAL AT A1A10P22 WITH OSCILLO SCOPE BULB WIRING RE 3 Vp p TO 5 Vp p 1 27 SWITCH A1A1052 PROPER PROBLEM INDICAT WIIHFREQSE LECT SWITCH TURN POWER OFF REPLACE amp 1A27 TURN POWER ON aM Figure 5 5 Receiver troublshooting sheet 13 of 14 5 56 INPUTS AT gt PROBLEM INDICAT ED WITH 7980 MHz LOOP P C BD TURN POWER OFF REPLACE 10 TURN POWER ON PROBLEM INDICAT WITH 79 80 MHz LOOP P C BD URN POWER OFF REPLACE AtA10 URN POWER ON MEASURE SIGNAL A1A3A5J2 WITH SA PROBLEM INDICAT IED WITH CLOCK DIVIDER POWER OFF RE PLACE 4 TURN POWER ON MEASURE SIGNAL A1A3A5J1 WITH SA NO 5 dBm TO 5 dBm YES PROBLEM INDICAT ED WITH MASTER OSCILLATOR OUT PUT DISTRIBUTION AMPL TURN POW ER OFF REPLACE RETURN TO 38 THEN TO8 SH 3 WHEN PROBLEM 15 CORRECTED Figure 5 5 Receiver troubleshooting sheet 14 of 14 PROBLEM INPICAT ED WITH MASTER OSCILLATOR TURN POWER OFF REPLACE A1A3U1 TURN POWER ON RETURN TO 38 THEN TO8 SH3 WHEN PROBLEM 18 CORRECTED TM 11 6625 3016 14 5 57 TM 11 6625 3016 14 START SET AN GRM 114 CONTROLSAS FOLLOWS SET AC DC SWITCH TO D SET SWEEP SWITCH TO 1 mS
61. UNLESS OTHERWISE NOTED 3 ALL RESISTANGE IS EXPRESSED IN OHMS UNLESS OTHERWISE NOTED 4 ALL CAPACITANCE IS EXPRESSED IN PICOFARADS UNLESS OTHERWISE NOTED 5 THE VALUE OF R 0 IS SET AT TEST TO REDUSE GAINCFOR TESTING PURPOSES ONLY 6 ALL REF NO S CARRY AN ASSIGNED DESIGNATOR SERIES e g THIS SCHEMATIC CARRIES SERIES AIAG 4 AIAGAI THEREFORE RI 19 DESIGNATED 1 Figure 6 13 TM11 6625 3016 14 41702 OUTPUT TO 1200 MHz FILTER 1200 MHz amplifier A1A6 schematic diagram 6 33 6 34 blank TM11 6625 3016 14 DRAFTSMAN NOTES ON SH 1901 BECOMES NOTES Ji902 MATIZ LAST REF NO USED 1130 AIATC2 AIATCRB a AIATFLI O 22uF AIATJ2 E AIA7L2 M AIATR4 490 J202 2 ALL RESISTORS ARE 1 4 W 10 IN FROM ANTENNA OUT TO XFER RELAY Dee TO POWER MON RELAY 3 ALL RESISTANCE IS EXPRESSED IN OHMS UNLESS OTHERWISE AAT B NOTED MEGH ASSY STATIC DIS PROTEST 3 ALL DIODES 47047 2 360 205 ee UEM MET 5 ALL REF NO S CARRY AN ASSIGNED DESIGNATOR SERIES e g THIS SCHEMATIC CARRIES SERIES AIA7 THEREFORE RI IS DESIGNATED AIA7RI ASSY STATIG DIS 7022 2360 200 L Figure 6 14 Static discharge protector A1A7 schematic diagram 6 35 6 36 blank TM11 6625 3016 14 142002 RAW DC TO PWR SWITCH ads RAW DC TO PWA EWITOH 0 SEE DETAL 15 wc 12 v D
62. all disconnected elec trical wiring or cables Disconnect power cable from pow er source and the BATT fuse from rear of AN GRM 114 before disassembling any tion of the equipment Table 5 13 provides disassembly sequences for module to be removed from the AN GRM 114 Use this table before proceeding to the actual dis assembly procedure for the module to be removed This allows removal of a module using a minimum number of disassembly steps Find the desired module to be removed in the first column of then in column three locate modules which must be removed before removing the de sired module The module removal paragraphs are listed in column four When necessary refer to component location diagrams located at the end of the alignment procedures to find referenced connectors jacks and potentiometers CAUTION Use extreme care when unsoldering wires from feed thru capacitors Carefully lift wires straight out rather than pulling them to side Do not bend semi rigid coax cables 5 125 921 9 zh SCOPE 2 i C E e ERE p E MEE 7 No GENERATOR RT Swi4 Swi2 R5 Figure 5 14 Front panel rear view component location diagram 1 US 71 9102 9299 1 WL TM 11 6625 3016 14 AIA2J AIA9J4 AIAIOJ2 3 5 lt lt C O
63. amounts listed DC positions Provides high impe dance dc input OHMS only position For use when measuring resistance INPUT connector Input connector for MM 100 probe or test cable VOL control Controls audio output of MM 100 internal speaker RANGE control Controls meter display as follows VOLTS positions When FUNCTION control is in DC positions value of VOLTS position re presents full scale meter deflection for dc voltage When FUNCTION con trol is in AC positions value of VOLTS position represents full scale meter deflection for ac voltage OHMS position When FUNCTION control is in OHMS only posi tion measured resistance equals value of OHMS scale on meter times value of OHMS position on RANGE control AM position Peak AM modulation is displayed on top scale of meter 4 12 Table 4 1 AN GRM 114 Controls Control indicator or connector RANGE control Continued DIST positions SINAD position TM 11 6625 3016 14 Indicators and Connectors Continued Function Top or second scale of meter depending on value of position displays distortion Meter indicates value of signal noise and distor tion on SINAD scale NOTE DIST and SINAD positions are intended for use at 1 kHz only 4 3 Operating Procedures Table 4 2 lists start up procedures emergency operating procedures and stopping procedures for the AN GRM 114 4 4 RF Signal Generator Op
64. and two spacers 48 which hold 1200 MHz Filter Diode Switch Assembly 49 to mounting bracket 30 5 46 19 Tag and disconnect two semi rigid coax cables from assembly 49 figure 5 16 NOTE Use extreme care so as not to kink cables 20 Tag and unsolder wire from feed thru capacitor on assembly 49 5 46 24 Remove two Phillips screws 50 which hold straps for two remaining coax cables 22 Tag and disconnect two remaining coax cables from assembly 49 23 Remove assembly from AN GRM 114 24 Discharge capacitor 1 8 1 7 Then loosen one slotted screw in pacitor mounting clamp 5 Remove 25 26 27 28 29 capacitor from mounting clamp fig ure 5 46 Remove 7 BATT fuse from fuse holder on rear panel of AN GRM 114 Tag and disconnect coax cables from High Frequency Multiplier Mixer As sembly 51 figure 5 46 Unplug mating connector from con nector on assembly 51 L figure 5 46 Use an Allen wrench to remove four socket head screws which hold as sembly 51 to mounting bracket 30 figure 5 46 Remove assembly 51 from mounting bracket 30 figure 5 46 f Removal of Assemblies from Mother Board 1 Remove two 1 4 Phillips screws 151 and two lockwashers 152 which se cure Regulator Power Supply Circuit Board retainer 8 to frame support member 129 figure 5 46 Remove Circuit board retainer 8 from
65. figure 6 20 d In the output circuit of the Dual Tone Generator the fixed tone the variable tone and input at the EXT MOD connector are summed The summed signal is applied to an output buffer amplifier The amplified signal is applied to the INT MOD OUT connector to the AM FM switch which applies it to the FM AM Generator figure 6 38 and to the INT MOD position of the INT MOD RCVR switch This switch couples the sig nal to the VOL control and the VOL control feeds the 250 kHz I F Monitor Audio Circuit Board which applies an audio signal to the Speaker 3 8 Oscilloscope Theory for a block diagram Refer to figure 3 8 operate the oscilloscope the ANALY DISPR control must be turned fully ccw in detent When the control is in this position the Spectrum Analyzer is off arid the Oscilloscope is on The 3 12 AC OFF DC switch must be in either the AC or DC position These two positions allow 12 V to the Oscilloscope Inverter Circuit Board figurel 6 28 b The Inverter Circuit Board is the power supply for the crt It uses the 12 V allowed by the AC OFF DC switch as a source for the switch ing regulator 2000 V dc is developed for the crt cathode and 200 V dc is developed for the hori zontal and vertical deflection plates of the crt The crt heater voltage is also developed The Inverter Board sends signals to the CRT for blanking of the retrace and it also controls the intens
66. m A als NN 00 gt CO SY y T gt gt N SIA O1 lt ER En o ER lex o 9 Co ale 4 09 N 4 81 ER Co O1 ER TM 11 6625 3016 14 LIST OF ILLUSTRATIONS Continued Figure Title Regulator and power supply A1A14 component location diagram 1080 MHz multiplier amplifier A1A15 component location diagram 1200 MHz diode switch A1A6 component location diagram Power monitor A1A7 component location diagram Spectrum analyzer A1A18 component location diagram Spectrum analyzer module no 1 A1A18A1 component location diagram Spectrum analyzer module no 2 A1A18A3 component location diagram Oscilloscope main circuit board A1A18A4 component location diagram ist mixer A1A19 component location diagram 2nd mixer A1A20 component location diagram 100 MHz filter A1A21 component location diagram 100 MHz amplifier 108 MHz mixer A1A24A1 component location diagram 120 MHz receiver A1A24A2 component location diagram FM AM generator A1A24A3 component location diagram Relay driver A1A25 component location diagram High level amplifier A1A28 component location diagram High frequency multiplier mixer A1A26 component location
67. time CRT DISPLAY 7 To determine origin of spurious signal in crease or decrease setting of 1 MHz and 100 kHz segments of FREQUENCY MHz thurnbwheels several times above below center frequency TM 11 6625 3016 14 Table 4 13 Spectrum Analyzer Operating Instructions for Spurious Signal Detection Continued Procedure Illustration Step 7 a If the spurious signal moves closer Cont to or further away from carrier signal the spurious signal is being produced by the CARRIER SPURIOUS AN GRM 114 and thus can be disregarded SIGNAL SIGNAL b If the spurious signal moves in same direction and same distance as carrier sig nal the spurious signal is being produced by UUT _ E 8 To determine frequency of spurious signal increase or decrease the setting of the FREQUENCY MHz thumbwheels while rotating ANALY DISPR OFF control ccw until the spurious signal is aligned with major vertical axis The setting of FREQUENCY MHz thumbwheels re presents frequency of spurious signal ANALY DISPR OFF _ NOTE CRT DISPLAY ANALY DISPR OFF control should be fully ccw short of detent when final frequency reading is taken To verify actual center of AN GRM 114 spectrum analy zer place GEN RCVR switch to GEN position and observe generated signal GEN RCVR 4 47 TM 11 6625 3016 14 Table 413 Spectrum Analyzer Operating Instructions for Spurious Signal Detection
68. to Rear Panel Solder wires to transformer figure 5 46 3 Install Battery Cover 6 5 46 retaining plate 4 5 6 10 11 12 13 14 15 16 17 Install Modified Battery mechanical assembly 66 figure 5 46 Plug in battery connector figure 5 46 Attach two 3 3 4 Phillips screws 64 and two flat washer 65 which hold Modified Battery mechanical as sembly 66 to Rear Panel 58 figure 5 46 Install 20 dB pad 61 5 46 Attach four 3 8 Phillips screws which hold 20 dB pad 61 to Rear Panel 58 figure 5 46 Attach hex nut connection between 20 dB pad 61 and Transmitter Sensor 62 figure 5 46 Install Duty Cycle Regulator 59 to Rear Panel 58 figure 5 46 Attach four 3 8 Phillips screws which hold Duty Cycle Regulator 59 to Rear Panel 58 Then plug A1A8A1P1 into A1A8A1J1 140 and tighten two captive screws Install Phillips screw and terminal lug at inside bottom of regulator figure 5 46 Install Transmitter sensor 62 figure Solder wire to feed through capacitor Attach semi rigid coax to Transmitter Sensor 62 figure 5 46 Install Power Monitor 60 to 20 dB pad 61 figure 5 46 Attach hex nut connection between Power Monitor 60 to 20 dB pad 61 figure 5 46 Attach tagged coax cables to Power Monitor 60 TM 11 6625 3016 14 d Mother Board Reassembly 1
69. to desired rf output level in dBm Re cord result RF LEVEL BFO INJECTION HI LV L uV X 100 NORM e Rotate RF LEVEL BFO IN JECTION dial to setting obtained in step 4 d f The AN GRM 114 is now gen erating rf signals at desired frequency and output level TM 11 6625 3016 14 Table 4 5 RF Signal Generator Operating Instructions for RF Signals Step Procedure 1 Place AM FM switch to AM 2 Set MODULATION FREQ Hz thumb wheels to desired tone modulation frequency 24 MODULATION FREQ Hz SL TM 11 6625 3016 14 Table 4 5 RF Signal Generator Operating Instructions for AM RF Signals Continued Step Procedure Illustration Rotate ANALY DISPR OFF control fully ccw to detent position ANALY DISPR OFF Place EXT V DIV control to 1 5 KHz 6KHz or 15 KHz EXT V DIV _ 4 19 TM 11 6625 3016 14 Table 4 5 RF Signal Generator Operating Instructions for AM RF Signals Continued _ Step Procedure When applying power to oscil loscope or Spectrum analyzer through PWR OFF BATT switch or AC DC OFF switch make sure INTENSITY con trol is as moderate left position 5 Adjust INTENSITY control cw and FOCUS control appropriately for a sharp visible trace display Adjust VERT control and HORIZ con trol to obtain a centered trace with lower edge of displayed carrier aligned with major horizontal axis illustration INTENSITY pd lt rOCLIS re
70. 10 dB Input 150 watts 1 10 dB attenuator 1 20 dB attenuator 1 30 dB attenuator 1 Cigarette lighter adpater plug DC power cord 1 Test probe for multimeter 1 Cable BNC on one end N type connector on other end 1 Antenna 1 90 BNC Connector 1 TM 11 6625 3016 14 Table 1 4 Items Supplied Continued Item Spare fuses 1 32 A 250 V 1 1 4 A 125 V Slow Blow 7 1 2 A 32 V Allen Wrench Power cord AC Canvas Cover Carrying Case Technical Manual TM 11 6625 3016 14 1 12 Warranty Information a Warranty 1 IFR Inc warrants that each new in strument manufactured by it is free from defects in material or workmanship under normal use and service for a period of two years from the ship ping date NOTE 90 day warranty on battery pack Each instrument is functionally tested immediately prior to shipment If upon examina tion by IFR the instrument is determined to be defective in workmanship or material IFR will subject to the conditions set forth below either repair the defective part or replace it with a new part on a pro rata basis IFR shall not be liable for any delay or failure to furnish a replacement part resulting directly or indirectly from any gov ernmental restriction priority or allocation or any other governmental regulatory order or action nor shall IFR be liable for damages by reason of the failure of the instrument to perform properly or for any consequential damages The warranty does not apply
71. 10 of the observed amplitude and stays synchro nized If the displayed signal is not correct adjust A1A18A4R40 to ob tain the synchronized signal desired Set the EXT V DIV Vernier control fully cw to CAL the AM FM switch to AM and vary the INT MOD OFF control to produce an AM signal envelope with 0 to 1096 modulation Verify that the signal displayed stays synchronized If the signal does not remain synchronized adjust A1A18 A4R40 to obtain synchronization Set the SWEEP switch to 0 1 mS While adjusting the SWEEP control ccw verify that the signal displayed stays synchronized the signal does not stay synchronized adjust A1A18A4R40 to keep the signal synchronized 15 16 2 17 18 19 20 21 Set SWEEP Vernier control fully cw to CAL Repeat steps 3 through 15 until no adjustments are required Attach a BNC tee adapter to the SCOPE IN connector on the front panel Connect a coaxial cable between the INT MOD OUT connector and one side of the BNC tee Connect a coaxial cable between the remaining side of the BNC tee and the vertical input of an external oscil loscope Set the EXT V DIV switch to 1 KHz and the SWEEP switch to 1 mS Set the external oscilloscope for 0 1 volts per division 1 millisecond per division horizontal sweep and adjust the AN GRM 114 INT MOD control for a four major division signal on the external oscilloscope
72. 123 086 REAR PANEL 12 sv 12V n ew BATT OW D RELAY 3 Wwe BATT 39v RAW DC RAW DC RAW DC Sw RAW DC Sw N C N C UPPER FLOOR ZERO PULSE P O 1 24 4 GEN 129 MHz RCVR AGC IN BANDWIDTH we GND 4 CLOCK 1 7017 232900 T SEE SCHEMATIC 0000 2354 600 190 Hr TM11 6625 3016 14 Jie MIKE KEY 5 GNO u GNO J SCOPE IN SCOPE IN J 22 ANT INPUT ANT INPUT J J3 TRANS RCVR TRANS R VR J 4 0 Mhz REF OUT REF QUT 2 Jel EXT SPKR AIAIET IREF AIAIE2 REF ONLY r MULTU LOS MIXER v 1089 MHz MULT 4 239 600 SCHEMATIC Lor REFERENCE ONLY 1200 MHz 704 2555 409 BEE SCHEMATIC 0000 2354 8600 LES REFERENCE ONLY b JE P O FRONT PANEL ASSY 7005 2377 700 4 ae J Figure 6 3 AN GRM 114 front panel assembly A1A1 schematic diagram sheet 2 of 2 6 13 6 14 blank NOTES
73. 14 5 118 15 Check that the FREQ ERROR KHz meter indicates 0 If the meter is correct adjust A1A13R47 for the 0 indication 16 Set the SQUELCH control fully ccw into detent off the EXT V DIV switch to 15 the FREQUENCY MHz thumbwheels to 000 000 0 the VERT control to center the oscillo scope trace on the center horizontal line and the 1 5 5 15 KHz switch to 15 17 Set the FREQUENCY MHz thumb wheels to 0000100 18 Check that the FREQ ERROR KHz meter and the oscilloscope indicate 10 0 5 kHz If the FREQ ERROR KHz meter indication is not correct adjust A1A13R39 for a reading of 10 0 5 kHz If the oscilloscope indication is not correct adjust A1A13R44 for a trace that is 10 0 5 kHz 19 Set 1 5 5 15 KHz switch to 5 set EXT V DIV switch to 5 and adjust the VERT control to center the oscilloscope trace on the center zontal line 20 Set FREQUENCY MHz thumbwheels to 0000050 Check that the FREQ ERROR KHz meter and the oscillo scope indicate 5 0 2 kHz If the FREQ ERROR KHz meter indica tion is not correct adjust A1A13R41 for a reading of 5 0 2 kHz If the oscilloscope indication is not correct adjust A1A13R44 for a trace that is 5 0 2 kHz 21 Set 1 5 5 15 KHz switch to 1 5 set EXT V DIV switch to 1 5 and adjust the VERT control to center the os cilloscope trace on the center hori zontal line 22 Set FREQUENCY MHz thumbwheels to 000 001
74. 15 CONNECTED TO 11 0 10 ALL CIRCUITRY OUTSIDE OF THE BOLO DASHED LINE IS MOUNTEO ON THE FRONT PANEL 7005 2380 400 AND CARRIES REFERENCE DESIGNATOR SERIES A2 THEREFORE R 15 DESIGNATED AZA AGRI 11 ASSY NO 7010 2380 300 CARRIES REFERENCE DESIGNATOR SERIES AZAIA THEREFORE RI 16 DESIGNATED Peig BECOMES 67301 47301 873014 THRU 373015 873024 THRU 373020 R7301 THRU R7318 P7304 97304 7301 SP7301 M7301 47302 DRAFTSMAN S NOTE 10 2380 300 80 assy 100 LT ABAIPI ARAL ARC AZAIARSIA THRI ABALAPSIG A2AIAZSEA THRU ABAIAPR2D THRU ABA ARIT ARAIAPA ARAL ARIS AZALAQE AZAIAZSP 2 2 878058 8 azaiagsie Q VOLUME Q VOLUME R7308 5 2 TM11 6625 3016 14 n EE HC EL ne es CLP MEE en eB da es ee a EE a HOS 05 I cr ar y Rr x D4047e LAY aaron 1010 2 300 400 PC BD MM 100 L 7100 7200 x erp M DEMNM ZI t ee Ems Figure 6 43 100 assembly A2A1 schematic diagram sheet 1 of 3 6 109 6 110 blank TM11
75. 1800 4701 0222 003 2200 4701 0272 003 2700 03 2 003 3300 4701 0392 000 3900 814284189 AND AL 2 11 2 ARE SELECTED TO FREQUENCY RESPONSE DRAFTSMAN NOTES ON SH 0680 BECOMES 16502 2842 10 R22 ON P C BD 8 SET AT TEST S A 7 RESISTOR FLEGO AIARSFLI NOMINAL VALUE INSTALLED 16 89 k 1 8 Wy 10 8502 AIAROFLE AL AZBAZATLI INDUCTANCE VALUE 3 0 mH 2 25 SELECT RANGE 39 ON 33 k 1 8 W 10 2 9503 4T0l 0393 O03 38 k 4701 0333 003 33 k IS SELECTED FOR THE O dBm INDICATOR LIGHT ADJUSTMENT AIAZBFLS 1 MEASURED AT kHz SERIES CIRCUIT OR EQUIVALENT P C ASSY 1 i 700 2572100 ALL REF CARRY AN ASSIGNED DESIGNATOR SERIES e g THIS SCHEMATIC CARRIES SERIES AIAZB pu THEREFORE FI 8 AIAZEAS DESIGNATED 920 2575 800 1 PG BD assy 2 7010 2372 400 emer 7 7 Lever awe assy 7008 2372 800 imt med 650 INPUT FROM FIRST MER RELAY TO 735 MAX INPUT rc ee ee d cas 330 174 4 108 iv RS 3969 NOTE 1800 QI F 104 W 10 TM11 6625 3016 14 78755 LAS Dc bse Tia
76. 1982 _____ TORO 5850 0000 010 AADU ov SCHEMAT L 9069 2382 50 FM AM GENERATOR 7608 2376 200 SEE SCHEMATIC 0060 2376 000 AIAR4A3 15 10 Ha IN 8050 0040 42 E CE pm lw TORO OUTPUT DIST AMP 557 SEE SCHEMATIC Je 8056 0080 748 10Mnz T 1 LOSE 48 10MH OLT 79 80 MHz LOOP ASSY 7010 2342 4060 SEE SCHEMATIC 0000 2342 500 050 0042 220 n 42 44 1 9 8MHr GUT W OUT 5950 0033 440 AIATE s 050 0042 09 5050 03 0 ATTENUATOR MINOR ASST P70 7905 2573 1 7 Ji 2019 2555 900 Ja 1200 562 SCHEMATIC 200 0000 2554 800 AIAG AMP ASSY INPUT 6042 2376 G50 a2 DOLE Sw ASST 7313 232 9 700 SEE SCHEMATIC 2 OG60 2312 400 FIRST MXER ASS 0320 72 EN Ji 005 2373 30 24 050 0320 720 E 200 RMON SEE SCHEMATIC 1200 1200MHz UUT TO 2ND RELAY 0090 2377 1090 IF w MXER F 800 s3 IN FROM 1209 22001 T INPUT J 45 FROM TOHILEVEL HIL VEL 188 500 5050 0010 805 6050 0044 720 HIGH LEVEL 1008 372 500 9000 2371 892 SCHEMATIC 5050 0310 i155 7005 2373 500 Ji
77. 2364 600 Repair 0 4 24 M 01018 MECH ASSY FIRST MIXER A1A19 Inspect 0 1 Visual P N 7005 2373 300 Test 0 5 3 4 7 14 15 16 19 20 24 Test 0 7 3 4 7 14 15 16 19 20 24 28 Replace 0 3 24 G H Repair 1 0 24 01019 MECH ASSY SECOND MIXER 1 20 Inspect 0 2 Visual P N 7017 2346 200 Test 0 7 3 14 19 24 Test 1 0 3 4 14 19 24 28 Replace 0 3 24 G H 01020 MECH ASSY 100 MHZ FILTER 1 21 Inspect 0 1 Visual P N 7018 2359 100 Test 0 3 3 14 24 Test 0 3 3 4 7 8 14 24 Replace 0 2 24 E 0102001 PCB ASSY 100 MHZ FILTER A1A21A1 Test 0 3 3 4 7 8 14 P N 7010 2330 300 24 Repair 0 4 24 01021 COAX CABLE ASSY A1A22 Inspect 0 5 Visual P N 6042 2645 5XX Test 0 3 4 24 Repair 0 3 24 M 01022 MECH ASSY BATTERY MODIFIED A1A23 Inspect 0 1 Visual P N 7005 7624 500 Test 0 2 4 Replace 0 2 24 01023 MECH ASSY LOWER FLOOR 1 24 Inspect 0 1 Visual P N 7005 2349 201 Replace 0 5 24 D Repair 1 0 24 0102301 MECH ASSY 100 MHZ AMPLIFIER 108 MHZ MIXER Inspect 0 2 Visual i 1 24 1 Test 0 5 3 14 24 P N 7017 2321 900 Test 1 0 3 7 8 14 24 32 42 Repair 0 3 24 F K L M 010230101 PCB ASSY 100 MHZ AMPLIFIER 108 MIXER A1A24A1A1 Test 1 0 3 4 7 8 14 P N 7010 2309 500 24 32 42 Repair 0 5 24 F K L M 0102362 MECH ASSY 120 MHZ RECEIVER A1A24A2 Inspect 0 2 Visual 7027 2348 300 Test 1 0 2 3 4 7 14 16 24 Test 1 5 1 3 4 7 14 16 24 28 42 Repair 0 3 24 H M 010230291 ASSY 120 MHZ RECEIVER 1 24 2 1 Test 1 5 1 3 4 7 14 P N 7010 23
78. 29 30 31 32 33 34 35 36 37 Set 1 KHz INT MOD control for a 10 kHz indication on the external modulation meter Check that the DEVIATION KHz meter indicates 10 0 1 kHz If the DEVIATION KHz meter indication is not correct adjust A1A13R79 for a reading of 10 0 1 kHz Set the 1 KHz INT MOD control for a 4 kHz indication on the modulation meter set the RCVR WIDE MID NARROW switch to NARROW set the EXT V DIV switch to 6 KHz and set the DEV PWR switch to 6 KHz Check that the DEVIATION KHz meter indicates 4 1 kHz If the DE VIATION KHz meter indication is not correct adjust A1A13R83 for a reading of 4 1 kHz Set 1 KHz INT MOD control for a 1 kHz indication on the modulation meter set the EXT V DIV switch to 1 5 KHz and set the DEV PWR switch to 2 KHz Verify that the DEVIATION KHz meter indicates 1 0 05 kHz If the DEVIATION KHz meter indication is not correct adjust A1A13R85 for a reading of 1 0 05 kHz Disconnect the external modulation meter and coaxial cable Connect the coaxial cable between the MM 100 DE MOD jack and the digital multimeter connect the MiU 100 cable to the EXT ACC jack on the AN GRM 114 set the GEN RCVR switch to RCVR set AM FM switch to AM and connect a coaxial cable between the ANT IN PUT jack and the rf signal generator Output Adjust the rf signal generator for a 120 MHz output with a level of 60 dBm and modula
79. 3016 14 REPAIR OR RE PLACE AS NECESSARY SH 1 Frequency error measurement troubleshooting sheet 2 of 3 5 69 TM 11 6625 3016 14 REMOVE A1A13 BOARD FROM EXTENDER BOARD REMOVE EXTEN DER BOARD FROM MOTHER BOARD CONNECTOR PLUG A1A13 BOARD INTO MOTHER BOARD CONNECTOR REFER TO DIS ASSEMBLY ASSEMBLY IN STRUCTIONS TO PUT CASE ON CAREFULLY PUT ON CASE UNPLUG A1A13 BOARD FROM EXTENDER BOARD PLUG A KNOWN GOOD A1A13 BOARD INTO EXTENDER BOARD PRESET AN GRM 114 CONTROLS PER TABLE 5 6 SET PWR QEE BATT SWITCH TO OFF DISCHARGE FIL TER CAPACITORS CHECK CONTIN UITY FROM A1A1R1 TO PIN 15 OF A1A13 BOARD REPAIR OR RE PLACE AS NECESSARY CHECK A1A1R1 AND ASSOCIATED WIRING ALL NORMAL Figure 5 7 Frequency error measurement troubleshooting sheet 3 of 3 5 70 TM 11 6625 3016 14 Table 5 9 RF Signal Generator Troubleshooting Initial Conditions Control INTENSITY EXT V DIV EXT V DIV Vernier AC DC OFF SWEEP SWEEP Vernier MODULATION FREQ Hz INT MOD OFF 1 KHz INT MOD VERT ANALY DISPR HORIZ KHz AM FM BFO OFF VOL INT MOD RCVR SQUELCH DEV PWR GEN RCVR RCVR WIDE MID NARROW RF LEVEL BFO INJECTION HI LVL uV X 100 NORM AUTO OFF ZERO BATT PWR OFF BATT FREQUENCY MHz Setting As required 15 KHz CAL DC 1 mS CAL 0000 0 OFF fully ccw in detent OFF fully ccw in detent Midrange
80. 40 dB marking on spectrum analyzer 10 watts 50 dB marking on spectrum analyzer 1 watt and 60 dB marking on spectrum analyzer 0 1 watt 4 60 11 6625 3016 14 Table 4 17 Power Monitor Operating Instructions Measuring Transmitter Carrier Power Continued Step Procedure Illustration 8 Emergency operating procedures For emer ao eee 9 Stopping procedures Refer to the stop ping procedures in table 4 2 Table 4 18 Master Oscillator Calibration using Received Time Standard Signal step Procedure Illustration l Perform the steps necessary to receive AM signals as listed unde NOTE Set AM FM switch to AM Set FREQUENCY MHz thumb wheels to 10 0000 MHz Set DEV PWR control to SIG 2 Set AN GRM 114 controls for oscilloscope operation as listed in table 4 7 FREQUENCY MHz 11 6625 3016 14 Table 4 18 Master Oscillator Calibration using Received Time Standard Signal Continued Step Procedure Illustration 3 Rotate EXT V DIV control to 15 KHz 4 Insert a short length of wire into center conductor of 10 MHz REF OUT con nector 4 62 Step TM11 6625 3016 14 Table 4 18 Master Oscillator Calibration using Received Time Standard Signal Continued Procedure Adjust position of wire to obtain a suitable beat note from AN GRM 1 14 speaker Using small screwdriver adjust the 10 MHz CAL adjustment until the beat note achieves as low a freque
81. 43 P 4 4 25 aes de MEME DU IS Y hist EX TEn DISCONNRECT MCAS URE SIGNAL 1 Vvco S A3A241 FROM ATATAJA2 4 i WITH SA GO d l S Keras sa i i i i i L S 4 1 SUBSTITUTE EX H EXTERNAL D i NE s ve Pd M ce gt dris AY ER 1005 Mhe SQANGE J TO 30 V it 1 A2J4 4 aig 1 M N Nee at Pte le ne Mer sae Ru PM IIC Al e MEASUHE SIGNAL E i i TURN POWER Le gt RESLACE PASA Ser MA duce ce E T NO we dBm TO YES t ASGRE SIGNA 413 dBm i 45 141 1200 2200 MHz WITH SA ANGE AT A1A3 A2J3 roe cA PROBLEM INDICAT wii 1200 2200 WITH HET AMP 2 OSCILLATOR 45 dBm TO 55 72 PRESCALER TURN OFF dBm AT TURN POWER OFF REPLACE A1A3A2 27 TURN POWER A ues TURA M 1 l Nz Peewee eos PROD OS INDICA T GH ENE o ndeui T MIX SEN Qi F REPLACE i LI AG A26 i URN POWER o Figure 5 8 RF signal generator troubleshooting sheet 16 of 19 5 87
82. 49 10G 300 100 50 iSCM T INPUT OUTPUT T 1080MHt MULTIPLIER ASSY 7048 2351 800 SEE SCHEMATIC 0000 2354 500 6042 2376 620 1 120MH 080 0040 570 SPECTRUM ANALYZER ASSY 7029 2362 8600 4 SEESCHEMATE 0000 2365 600 5050 0041 520 P O 6050 9900 100 20 RECEIVERASSY 7 27 2348 300 a BEE SCHEMATIC 0 234 apaan O 2o 4 2 m T 6050 002 1 410 7005 2265 70 MOTHER BOARD ABSY 7005 2353 7014 BEE SCHEMATIC 0000 23582 700 5950 0040 870 HIGH Z LOCK PC BD 85 7910 2349 300 6050 0040 620 42 H SEE SCHEMATIC 0000 2339 6800 si 50 15014 2 OUT L 22 24 Figure 6 4 114 coaxial cable assembly A1A22 schematic diagram 6 15 6 16 blank NOTES 1 ALL REF NO S CARRY AN ASSIGNED DESIGNATOR SERES 60 THIS SCHEMATIC CARRIES SERIES 2 1 amp ALA3UI I THEREFORE 3 ASSY 1 5 IS DESIGNATED 1 TM11 6625 3016 14 1200 2200 Mhz pa eS Sa ee Reg tee Eee ig OSC ASSY 7025 2356 000 RF OUT DUT 1491 Fu
83. 5 46 14 Attach three 7 16 Phillips screws 46 which secure First Mixer 45 to frame support member 25 figure 5 46 15 Soldor wire to feed through capacitor 16 2 Install tagged coax cables to First Mixer 45 figure 5 46 17 Install speaker assembly plate retainer 41 to frame support member 25 figure 5 46 18 Solder wires to speaker assembly 19 Attach one 1 4 Phillips screw 38 and one lockwasher 39 and one 1 2 Phillips screw 40 and one lock washer 39 which secure speaker assembly plate retainer 41 to frame support member 25 figure 5 46 20 Attach 100 MHz Filter 37 to mount ing angle 77 with two screws 78 and two washers 79 figure 5 46 21 Solder wire to feed through capacitor on assembly 37 5 46 22 Install tagged coax cables to assembly 37 figure 5 46 23 Attach mounting angle 77 to 1200 MHz Diode Switch High Frequency Multiplier Mixer mounting bracket 30 with two screws 75 and lock washers 76 figure 5 46 5 169 TM 11 6625 3016 14 f 5 170 24 25 26 27 1 10 Install tagged coax cables to Second Mixer Assembly 24 figure 5 46 Plug in circular mating connector 26 Install Second Mixer Assembly 24 to frame support member 25 5 46 Attach two 3 8 Phillips screws 23 which secure Second Mixer Assembly 24 to frame support memb
84. 5 47 Attach one 1 2 Phillips screw 42 and one lockwasher 43 to secure frame support member 25 to Front Panel 44 figure 5 46 Attach Phillips screws and lock washers which hold frame support members to Front Panel 44 5 46 5 173 TM 11 6625 3016 14 Spectrum Analyzer Reassembly 1 10 5 174 Install Spectrum Analyzer Assembly 125 to top left frame support mem ber 129 and Front Panel 44 figure 5 46 Attach Spectrum Analyzer Assembly 125 to frame support member 129 with two hex nuts 143 and one lock washer on one screw 126 Install connectors at 144 and 145 figure 5 47 Attach two screws 130 two lock washers 131 that hold top left frame support member 129 to Front Panel 44 Tighten frame support member 129 to Front Panel 44 figure 5 46 Attach socket head screws with Allen wrench to INTENSITY control 124 Attach control 124 one hex nut 134 and one washer 135 5 46 Attach socket head screws with Alien wrench to FOCUS control 121 Attach control 121 one hex nut 132 and one washer 133 5 46 Attach socket head screws with Allen wrench to VERT control 115 At tach control 5 46 Attach socket head screws with Allen wrench to ANALY DISPR OFF con trol 116 Attach control 116 fig ure 5 46 Install control 112 figure 5 46 Attach socket head screws with Allen
85. 5 of 13 SIG ON CRT IS 45 TO 95 OF 1 MAJ DIV IN HT NO YES SET H NORM SWITCH TO HI LVL TURN RF LEVEL BFO INJECTION DIAL SLOWLY cw UNTIL 0 dBm LAMP LIGHTS SIG ON CRT IS1 TO 2MAJ DIV IN HT YES SET FREQUENCY MHz SWITCHES TO 000 000 0 SLOWLY ADVANCE LEFTMOST FREQ SET HLLVL NORM MHz SWITCH FROM SwITCH TO ORM 9 DISCONNECT COAX CABLE FROM TRANS BCVR JACK amp CONNECT TO INT MOD OUT JACK TURN LEVEL BFO INJECTION DIAL FULLY cw SLOWLY ADVANCE LEFTMOST FREQ MHz SWITCH FROM 0 TO 9 SET FREQUENCY MHz SWITCHES TO 600 050 0 9 LOCK No SET SWEEP LAMPS ARE SWITCH Lms LIT SLOWLY ADVANCE FREQ MHz SWITCH ES FROM 000 050 0 TO 999 990 0 STARTING WITH LEFTMOST SWITCH ADJUST INT MOD amp VERT CONTROLS FOR A SIG ON CRT 6 MAJ DIV IN HEIGHT SET FREQUENCY MHz SWITCHES TO 000 0 NO ARE 6 MAJ DIV 1 MIN DIV IN L ARE LIT AT EACH SET TING amp LAMPS ARE Figure 5 2 AN GRM 114 performance test sheet 6 of 13 TM 11 6625 3016 14 ADJUST HORIZ CONTROL TO PUT MIDDLE PEAK ON CENTER VERTI CAL LINE OF CRT LINE UP WITH MAJ VERT LINES 2 MIN SET MODULATION FREQ SWITCHES TO Hz SET SWEEP SWITCH 1 mS ALL PEAKS ARE SAME HT 2 MIN ADJUST HORIZ CONTROL TO PUT CENTER PEAK ON CENTER VERTI CAL LINE OF CRT
86. 6 15 Rear panel assembly A1A8 schematic diagram 6 37 6 38 blank NOTES RAFTEMAN NOTES LAST REF NO USED STER oar ON SHY 1 2101 BECOMES AIAGAUI FLE 6210 AIABAIGI Jl E 94 eee See RI E cece RecuLaror assy L4 TC23 2836 400 5 Lisci 4 EI UIN Les ci 58 R24 5510 REG assy 2 ALL RESISTORS ARE 1 4 W 108 UNLESS OTHERWISE NOTED 3 ALL RESISTANCE IS EXPRESSED IN OHMS 585 OTHERWISE NOTED 4 11 02 03 4 L amp ARE 28 TURNS OF 17GA WIRE ON MAGNETICS 56930 2 CORE AIABATAL 8 R3 Bp assy 479 24 w FOR SNBOI THRU SNI380 2334 560 1 2 w FOR 8NI39I AND CN N 790 55342 d 6 ALL REF NO S CARRY AK ASSIGNED DESIGNATOR SERIES ag THIS SCHEMATIC CARRIES SERIES AIAGAIA AIABAIAIAI THEREFCRE TIIS DESIGNATED AIABAIAITID PART OF 12101 BATT ON 36 SWTCHED SWITCHED BATT IN IN RELAY GND RAW DC TO RAW nC CSS al in SS Se 2100 DUTY CYCLE REGULATOR A8SY i 7T023 2333 400 p TER 2200 Bb assy 720 324 090 Eee ste 1 DUTY CYCLE REG PC ED ASBY 7010 2208 000 CRE 4148 INGA CHARGER ADY ISOURGE 4 Sk F 33er iov 501
87. AC OFF DC switch LOCK left lamp When lit indicates proper operation of high fre quency phase lock loop Lamp will blink momen tarily when MHz segments of FREQUENCY MHz thumbwheels are increased in value or decreased in value however lamp should re main lit at all other times when power is applied LOCK right lamp When lit indicates proper operation of 79 80 MHz low frequency phase lock board in AN GRM 114 Lamp will blink momentarily when kHz and Hz segments of FREQUENCY MHz thumbwheels are increased or decreased in value however lamp should remain lit at all other times when power is applied FREQ ERROR KHz meter Provides visual display of difference between re ceived signal frequency and AN GRM 114 receiver frequency as represented by FRE QUENCY MHz thumbwheel setting FREQ ERROR KHz zero Mechanical zero adjustment of FREQ ERROR adjustment located below meter KHz meter intended for use when power is off ANT INPUT LEVEL lamp External antenna input to AN GRM 114 used primarily for off the air testing LEVEL lamp When lit indicates that input level at ANT INPUT connector is above the squelch threshold of AN GRM 114 receiver 4 10 Table 4 1 AN GRM 114 Controls Control indicator or connector DEV PWR control DEVIATION KHz WATTS meter zero adjustment located below meter NOTE The following controls and indi cators are located on the MM 100 Meter indicator NOTE All signa
88. ALL RESISTORS ARE Bw 10 UNLESS OTHERWISE NOTED 3 ALL R SISTANCE 15 EXPRESSED IN OHMS UNLESS OTHERWISE NOTED 4 ALL CAPACITANCE 18 EXPRESSED IN PICOFARADE UNLESS OTHERWISE NOTED 5 R30 19 SET AT TEST FROM THE FOLLOWING VALUES NOMINAL 2320 RANGE 2100 2320 6 RIIA MAY OR NOT BE INSTALLED AS NECESSARY 680 TO 1 BW 10 7 ALL REF NO S CARRY AN ASSIGNED DESIGNATOR BERIES THIS SCHEMATIC CARRIES SERIES AIMS THEREFORE Ri 15 DESIGNATED AIAISRID PAIA 2 y INPUT T gt GND AUDIO INPUT FROM VOL CONTE AUTOMATIC ZEROING OPEN CONTINUOUS PULL UP Steane ZEROING OFI TM11 6625 3016 14 e Roe 68 AUTO ZERO SAMPLING TANT 180 5 DIP TANT N nez DIODE SW DRIVER 10 TY 8v 8 Rea 220 SAMPLE amp HOLD CKT cas TANT P OP3IO oreo ory 2 lt T ZERO PULSE TO DIODE Sw 8 2ND MXER 2 2 2 Reg 1 EXT ZERO CONTAL gt ERROR MTR DEY DN GEN DEV ZERO AUDIO GND ADI 2 Figure 6 21 250 kHz i f monitor audio A1A13 schematic diagram sheet 1 of 3 6 53 6 54 blank TM11 6625 3016 14 Sm lt DELA
89. CENTER THE TRACE ON CRT SET FREQUENCY MHz SWITCHES TO 000 010 0 ADJUST A1A13R39 SET FREQ ROR METER TO 10 KHz VERIFY 10 KHz ON CRT SET FREQUEN MHz SWITCHES TO 000 000 Q SET 1 5 5 SWITCH TO 5 SET EXT V DIV SWITCH ADJUST VERT T CENTER TRACE ON CRT SET FREQUENCY MHz SWITCHES TO 000 005 o ADJUST A1A13R41 SET 5 KHz VERIFY 5 KHz CRT SET FRE E UN TOHES Yo SET 15 5 15 KHz SWITCH TO LS SET EXT V DIV SWITCH TO LS KHz ADJUST VERT CONTROL TO CENTER TRACE ON CRT SET FREQUENCY MHz SWITCHES TO 000 001 0 ADJUST A1A13R42 TO SET FREQ ER ROR METER TO 1 KHz VERIFY 1 KHz ON CRT ALL INDICATIONS PROPER NO YES FREQUENCY ERROR MEASUREMENT FUNCTION WORK ING NORMALLY SET PWR QEF BATT SWITCH TO OFF UNPLUG POWER CORD FROM AC OUTLET SH3 Figure 5 7 LOCATE ZERO RCVR TRIMMER ON FRONT PANEL VERIFY 12V DC AT ccw END TERMINAL 3 OF A1A1R1 AND PIN 2OF A1A13 BOARD 105 135 V DC YES VERIFY 11 V DC AT cw END TER MINAL 1 OF A1A1R1 AND PIN 15 OF A1A13 BOARD NO 11 05 V DC YES SH3 DISCHARGE FIL TER CAPACITORS CHECK CONTIN UITY FROM A1A1R1 TO PIN 2 OF A1A13 BOARD CHECK A1A1R1 AND ASSOCIAT ED WIRING ALL NO NORMAL SH 3 YES TM 11 6625
90. Do nott exceed 200 V peak to peak to SCOPE IN connector illustration 10 Connect BNC connector of remaining coax cable to tee connector attach ed to SCOPE IN connector Connect opposite and of coax cable to injection point on UUT Desired audio tone is now being injected into UUT UUT INJEC EIN POINT INT MOD OUT CONNECTOR N SCOPE IN CONNECTOR AN GRM 114 J UUT a SHORT i BNC TEE 11 To monitor the injected tones place INT ta MOD RCVR switch to INT and adjust VOL control for a comfortable listening level CONNECTORS VOL 3 INT MOOROy ES i TM 11 6625 3016 14 Table 4 16 Audio Generation with Oscilloscope Operating Instructions Continued Step Procedure Illustration 12 Emergency operating procedures For emergency operating procedures bat tery weakening refer to table 4 2 13 Stopping procedures Disconnect power from AN GRM 114 as instructed in table 4 2 before disconnecting power from UUT 4 9 Power Monitor Function lists 4 10 Master Oscillator Calibration Follow pro operating instructions for measuring transmitter cedures in to calibrate master oscil carrier power Such measurements utilize the later using a received time standard signal power monitor Table 4 17 Power Monitor Operating Instructions for Measuring Transmitter Carrier Power Illustration Step Procedure
91. E IN WT RO 22GA TOXO OUTPUT DIST AMP ASSY 1044 2362 000 AGC SYST 80 ASSY 7010 2368 600 Ja OUT J3 8 TO FRONT PANEL oo su 5v 4 TO 2ND MIXER O MHz J NER SO Y Y 2006 Sw 100 MH TOCLOCK g Je us DIVIDER 108 MHz MULTIPLIER OR 22GA J 10 M LOCK DIVIDER ASSY VECTRON 252 3803 7026 2521 700 10 kHz OUT 850 0000 010 4 10 Mha 2 OSC CAL WT EK 26GA 7 EN WT RD 26GA se O our z 4 5 FLi AMP 2 PRESCALER ASSY Y 7024 2322 500 3 ivl WT RD 825A FROM HF syi F OR 22GA Mixen 9 J2 8 TD HF LOCK ss vu UPPERFLOORMECH ASSY L 7006 2364 400 ee Figure 6 5 AN GRM 114 upper floor assembly schematic diagram 6 17 6 18 blank TM11 6625 3016 14 DRAFTSMAN NOTES Fy us 7 ON SHT 1 980 BECOMES NOTES J602 LAST REF USED AIASAIFLI AIAZAIFLE 1802 AIASAIFL2 AIASAIJ2 42401 AIAI L4 AIASAIAICIA AIAZAIAICRE FL602 2 AIASAIAILS AIASAIAIQ4 AIASAIAIRIT AIASAIAIXZ 1 8 w KI 7 7274 gt 2 ALL RESISTORS ARE 1 8 W 10 UNLESS OTHERWISE NOTED 3 ALL
92. EXISTS WITH AUDIO MONITORING FUNCTIONS SH4 FM AM GENERATOR A1A24A3 IS BAD SET PWR OFF BATT SWITCH PROBLEM WITH DUAL TONE GEN ERATOR 2 SET PWR QEF BATT SWITCH REPLACE A1A24A3 SET PWR QEE BATT SWITCH TO PWR CHECK EM AM SWITCH WIRING REPLACE A1A12 IF NECESSARY SET PWR OFE BATI SWITCH TO PWR Figure 5 8 RF signal generator troubleshooting sheet 3 of 19 MEASURE SIGNAL AT A1A13J1 1 WITH OSCILLOSCOPE MEASURE SIGNAL AT A1A20J6 WITH SA NO YES 250 kHz I F MONITOR AUDIO BOARD A1A13 CRT DISPLAY DEVIATION KHz WATTS METER OR SPEAKER IS BAD SET PWR OFF BATT SWITCH CHECK WIRING OF CRT SPEAKER DE VIATION KHz WATTS METER REPLACE A1A13 SET PWR OFF BATT SWITCH TO PWR IS 120 MHz AT 40 dBm TO 62 dBm NO YES 120 MHz RECEIVER A1A24A2 IS BAD SET PWR OFF BATT SWITCH TO OFF REPLACE A1A24A2 SET PWR OFF BATT SWITCH TO PWR MEASURE S GNAL AT ATA21A3J1 WITH SA 15 120 MHz 40 oB 60 deni 2ND MIXER A1A20 IS BAD SET PWR CFF BATT SWITCH REPLACE A1A20 Se PWR OFF SWITCH TO PWR Hm Figure 5 8 RF signal generator troubleshouting sheet 4 of 19 TM 11 6625 3016 14 FM AM GENECATOR 15 BAD SET PWR QFF BATT SWITCH OFF aaa S c ane REP
93. FM AM Generator A1A24A3 250 KHz 1 Monitor Audio A1A13 Regulator and Power Supply 1 14 VCO Tuner A1A11 VCO Tuner A1A11 250 KHz Monitor Audio A1A13 Regulator and Power Supply A1A14 1080 MHz Multiplier Amplifier A1A15 230 KHz 1 Monitor Audio A1A13 b FM AM Generator A1A24AS Table 5 10 AN GRM 114 Assemblies Assembly Power Monitor A1A17 Spectrum Analyzer 1 18 First Mixer A1A19 Second Mixer A1A20 100 MHz Filter A1A21 100 MHz Amplifier 108 MHz Mixer A1A24A1 120 MHz Receiver A1A24A2 FM AM Generator A1A24A3 High Frequency Multiplier Mixer A1A26 VCO Tuner A1A11 Alignment VCO Tuner A1A11 is aligned using the following pro cedure 1 Remove all power from the AN GRhI 114 and disassemble the unit to gain access to the VCO Tuner A1A11 module Then apply power to the AN GRM 114 2 Set the FREQUENCY MHz thumb wheels to 0000000 3 On 1200 2200 MHz Oscillator A1A3 A2 tag and remove plugs A1A3A2P4 and A1A3A3P1 from jack A1A3A2J4 and A1A3A3J1 respectively 4 Attach plug removed in step 3 to jack A1A3A2J4 TM 11 6625 3016 14 and Interactive Assemblies Continued Align or adjust assembly Power Monitor A1A17 Spectrum Analyzer A1A18 250 KHz Monitor Audio A1A13 b FM AM Generator A1A24A3 250 KHz Monitor Audio A1A13 b FM AM Generator A1A24A3 a High Frequency Multiplier Mixer A1A26 b VCO Tuner A1A11
94. FOR ESDS ITEMS USE WRIST GROUND STRAPS OR PERIODICALLY CHECK CONTINUITY AND MANUAL GROUNDING PROCEDURES RESISTANCE OF GROUNDING SYSTEM KEEP ESDS ITEMS IN PROTECTIVE USE ONLY METALIZED SOLDER SUCKERS COVERING WHEN NOT IN USE HANDLE ESDS ITEMS ONLY IN PROTECTED GROUND ALL ELECTRICAL TOOLS AREAS AND TEST EQUIPMENT MANUAL GROUNDING PROCEDURE MAKE CERTAIN EQUIPMENT IS POWERED DOWN TOUCH PACKAGE OF REPLACEMENTS ESDS ITEM TO GROUND BEFORE OPENING PRIOR TO REMOVING pene Sie TOUCH GROUND PRIOR TO INSERTING REPLACEMENT ESDS ITEMS ESD PROTECTIVE PACKAGING AND LABELING INTIMATE COVERING OF ANTISTATIC MATERIAL WITH AN OUTER WRAP OF EITHER TYPE 1 ALUMINIZED MATERIAL OR CONDUCTIVE PLASTIC FILM OR HYBRID LAMINATED BAGS HAVING AN INTERIOR OF ANTISTATIC MATERIAL WITH AN OUTER METALLIZED LAYER LABEL WITH SENSITIVE ELECTRONIC SYMBOL AND CAUTION NOTE This manual contains copyright material reproduced by permission of IFR Incorporated TM 11 6625 3016 14 TECHNICAL MANUAL HEADQUARTERS DEPARTMENT OF THE ARMY NO 11 6625 3016 14 Washington D C 18 June 1982 OPERATOR S ORGANIZATIONAL DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL TEST SET RADIO AN GRM 114 IFR NO 10005 MM 100 W 114 AC 114 ACCESSORY NSN 6625 01 108 6206 REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS You can help improve this manual If you find any mistakes or if you know of a way to improve the proced
95. FROM ATA3ASFLT1 22 REMOVE 4700 RESISTOR A1A3A5J3 A1A3A5P3 s DISCONNECT FROM REMOVE 47052 RESISTOR AND DISCONNECT COAX CABLES SE T PWR OFF SWITCH PWR USE SCOPE Wi TH 10x PRORE TO MEASURE 10 MHz LEVEL T CONNECT A 4700 RESISTOR FROM A1A3A5J4 TO GROUND TCXO OUT PUT DISTRIBUTION AMPLIFIER FROM UPPER FLOOR ASSEMBLY INSTALL NEW TCXO OUTPUT DISTRIBU TION AMPLIFIER ON UPPER FLOOR CAREFULLY SOL DER WIRE TO 1 CABLES 5 LEAVE DISCONNECTED SH 4 OUTPUT DISTRIBUTION AMPLIFIER IS BAD SET PWR OFF BATT SWITCH TO OFF SHORT 1 1 GROUND FULLY UNSOLDER WIRE FROM REMOVE 4702 RESISTOR AND DISCONNECT COAX CABLES REMOVE TCXO OUT PUT DISTRIBUTION MPLIFIER INSTAL EW TCXO OUTPUT ISTRIBUTION MPLIFIER CAREFULLY SOLDER IRE TQ qe ONNECT COAX ABLES LEAVE 4 Figure 5 11 and output distribution amplifier troubleshooting sheet 3 of 4 5 100 TM 11 6625 3016 14 SET PWR QEF ABOUT NO CAREFULL Y
96. LEVEL BFO INJECTION which is calibrated in both HV and dBm The variable attenuator is accurate at the TRANS RCVR port with a scaling factor which is controlled by the HI LVL uV x 100 NORM switch Attenuator output is applied to the 2nd Mixer where it can be attenuat ed by a 40 dB pad depending on the position of the HI LVL uV x 100 NORM switch If the switch is in the NORM position the 40 dB pad is selected is bypassed if the switch is in the UV x 100 or LVL position The generate diode switch ap plies a 120 MHz signal to the 2nd Mixer The 2nd Local Oscillator refer to Figure 3 6 a block diagram output mixes with the 120 MHz genera ted signal producing a frequency of approximately 1200 MHz 1200 MHz is fed to the 1200 MHz Diode Switch where it is fil tered applied to the 1200 MHz Amplifier fig ure 6 13 and returned to a second filter in the 1200 MHz Diode Switch From there the 1200 MHz signal is fed to the 1st Mixer where it mixes with the output of the 1st Local Oscillator The output of the 1st local oscillator is 1200 MHz above the setting of the three leftmost digits of the FREQUENCY MHz thumbwheels The 1st Mixer relays are de energized and the signal passes through to the Power Monitor Relays The relays are energized and the signal passes to the 20 dB pad and the Transmitter Sensor figure 6 11 The signal is then applied to the TRANS RCVR connector b When the HI LVL uV x 100 NO
97. MHz at an 18 Hz rate When the ANALY DISPR control is fully cw dispersion is maximum and the varactor causes the V C O to sweep from 150 MHz to 140 MHz at an 18 Hz rate The sweep 8 14 ing V C O allows signals to be viewed during mini mum dispersion which are 500 kHz from the frequency of the FREQUENCY MHz thumb wheels During maximum dispersion signals may be viewed which are 5 MHz from the frequency of the FREQUENCY MHz thumbwheels The V C O is phase locked to the 5 12 MHz crystal oscillator on Module No 2 to keep the center frequency at 145 MHz 3 10 MM 100 Multimeter Theory Refer to figure 3 11 for a block diagram a The MM 100 is powered by 12 V dc through its accessory cable at the EXT ACC con nector b Measurements of AM of modulation use a modulation frequency of 1 kHz AM of modulation information is derived from demodu lated output from the AN GRM 114 Demodulated input to the MM 100 is transformer coupled for isolation Then it is applied to a peak detector and a corresponding dc voltage is applied to the meter driver The AM of modulation is read on the top scale 0 1 100 of the meter c When measuring ohms the x1 position of the probe is recommended because there is less than 1 O from the tip of the probe to the probe output connector The FUNCTION control must be in the OHMS only position The RANGE con trol may be in any of the five OHMS positions x1 through x 10k The meter
98. NO FREQ COUNTER READS 7776 93 TO 7778 48 NO TM 11 6625 3016 14 DISCONNECT COAX NO CABLE FROM FREQ COUNTER amp CON NECT TO SCOPE AN JACK ON UNIT FREQ COUNTER READS 8887 92 TO 8889 69 SET MODULATION SWITCHES T SET EXT V DIV FPEGSNITEHES TO SWITCH 10 FREQ COUNTER READS 9998 90 TURN INT MOD CONTROL ccw TO OFF TURN 1 KHz INT MOD CONTROL FULLY ccw TO TURN INT MOD TURN 1 KHz INT CONTROL FULLY MOD CONTROL FULLY cw cw THEN SET MOD ULATION FREQ SWITCHES TO FREQ COUNTER READS 980 TO 1020 Hz Figure 5 2 AN GRM 114 performance test sheet 8 of 13 5 15 TM 11 6625 3016 14 TURN INT CONTROL FULLY ccw TO OFF SET RE LEVEL BF IAL TO 2 CONNECT 2 BNC TO UHF ADAPTERS TO AN RF WATT METER DISCONNECT COAX CABLE FROM AN GRM 114 SET BFO SWITCH TO INDICATES INTER NAL RF LEAKAGE NO CHECK FOR PRO PER CONNECTION OF COAX CABLING OR FAULTY CON DUCTIVE PAINT CONNECT A COAX CABLE BETWEEN DEVN METER READING IN CREASES SET DEV PWB SWITCH TO SIG IRANS BCVB JACK AND OUTPUT OF WATTMETER SET PWR OFF BATT SWITCH TO FF REFER TO DISASSEMBLY REASSEMBLY IN STRUCTIONS TO REMOVE CASE CONNECT A COAX CABLE BETWEEN INPUT OF WATT METER amp OUTPUT OF 150 W 10 dB ATTENUATOR SET BFO SWITCH
99. OF POWER SUPPLY r READ MM 100 METER 55 7 1545 V dc 7 4 REMOVE 100 PROBE FROM POWER SUPPLY 5 106 TO UND CONNECT DIGITAL VOLTMETER TO THE OUTPUT OF A FUNCTION GENERATOR SET FUNCTION GENERATOR TO DELIVER A 1 kHz SINEWAVEATA LEVEL OF 1 6 V rms SET MM 100 EUNCTJON SWITCH TO SET MM 100 RANGE SWITCH TOSVOLTS REMOVE DIGITAL VOLTMETER FROM FUNCTION GENER ATOn CONNECT MM 100 PROBE TO OUTPUT OF FUNCTION GEN ERATOR Figure 5 12 MM 100 multimeter troubleshooting sheet 5 of 10 READ MM 100 METER REMOVE 100 PROBE FROM OUT PUT OF FUNCTION GENERATOR CONNECT OUTPUT OF FUNCTION GEN ERATOR ACROSS A 600 225 LOAD RESISTANCE CONNECT DIGITAL VOLTMETER ACROSS LOAD RESISTANCE ADJUST OUTPUT OF FUNCTION GEN ERATOR TO EXACTLY 1 6 V rms SH 7 REMOVE MM 100 PROBE FROM OUTPUT OF FUNC TION GENERATOR REFER TO DISASS EMBLY ASSEMBLY INSTRUCTIONS TO OPEN 100 CONNECT MM 100 PROBE TO OUTPUT OF FUNCTION GENERATOR FOR A READING OF EXACTLY 1 6 V rms 1 6 V rms YES ADJUST A2A1A1R67 TM 11 6625 3016 14 4 CONTINUITY REPAIR PENDANT SH 9 Figure 5 12 MM 100 multimeter troubleshooting sheet 6 of 10 5 107 TM 11 6625 3016 14 FT T REMOVELOAD RESISTANCE AND DIGITAL VOLT METER FROM FUNCTION GEN IERATOR podes CON
100. PRIVATE USE 300 Commonder US Army Communications Electronics Command ATTN DRSEL ME MQ Fort Monmouth New Jersey 07703 201 631901834 3NOTV RECOMMENDED CHANGES TO EQUIPMENT TECHNICAL PUBLICATIONS SOMETEINE W RONG WITH THIS PUBLICATION FROM PRINT YOUR UNIT S COMPLETE ADDRESS DATE SENT PUBLICATION DATE PUBLICATION TITLE Test Set Radio AN GRM 114 THEN JOT DOWN THE DOPE ABOUT IT ON THIS FORM CAREFULLY TEAR IT OUT FOLD IT AND DROP IT IN THE MAIL PUBLICATION NUMBER TM 11 6625 3016 14 PAGE PARA FIGURE TABLE AND WHAT SHOULD BE DONE ABOUT IT NO NO 2 N lt lt 3 LE PRINTED NAME GRADE OR TITLE AND TELEPHONE NUMBER SIGN DA FORM 2028 2 PREVIOUS EDITIONS 5 YOUR GU WANTS TO KNOW ABOUT YOUR JUL 79 ARE OBSOLETE MAKE A CARBON COPY OF THIS AND IT TO YOUR HEADQUARTERS REVERSE OF DA FORM 2024 2 atte ee IN YOUR UNIT S ADDRESS e a p FOLD BACK oy iil POSTAGE FEES PAID OF THE ARMY _ R DOO 314 OFFICIAL BUSIMESS PENALTY FOR PRIVATE USE 309 Commander US Army Communications Electronics Command ATTN DRSEL ME MQ Fort Monmouth New Jersey 07703 SNOYV wn 3ivv NOTES 1 AST REF NO USED NAZCA AIAI di 1441 MAZEPA
101. Procedure 7 To measure SINAD value of applied signal set RANGE control to SINAD Read value on SINAD scale of meter NOTE For the following step the AM FM switch of the AN GRM 114 must be in AM position Adjust the FREQUENCY MHz thumbwheel switches to gener ate an AM signal 8 To read the AM modulation of the applied signal set RANGE control of multi meter to AM position read meter indication top second scale lt 4 73 TM 11 6625 3016 14 Table 4 22 Multimeter Operating Instructions Continued Step Procedure Illustration 9 Adjust INT MOD OFF control for de sired AM modulation Accuracy will be best with a 1 kHz signal HI LVL uV X 100 NORM RF LEVEL BFO INJECTION 10 Adjust the VOL control for a comfortable listening level Step TM 11 6625 3016 14 Table 4 22 Multimeter operating Instructions Continued Procedure NOTE To measure dc voltage and resistance a source external to the AN GRM 114 or a battery external to the AN GRM 114 is required If using source external to the AN GRM 114 connect one end of 2 ended BNG cable to INPUT connector of multimeter and one end to output of external source Make sure power is applied to AN GRM 114 and thus to multimeter before applying power to external sources Then refer to instructions in tables 4 9 and 4 10 Do not exceed 600 V ac or 800 V dc on the multimeter probe To measure dc vo
102. RELAY ORIVER P C BO ASSY 1014 2355 400 7048 2331 600 BEE SCHEMATIC T SEE SCHEMATIC 0900 2384 800 T 0600 5354 600 RIALS ALAS 25 P O 005 2377 700 Pro T0095 2377 700 Ful 100 MHz AMP 198 MIXER ABSY 7017 2321 800 GENERATOR Y SEE SCHEMATIC 2376 200 0006 je HE MA 2200100 0000 2376 000 AIA24A3 TM11 6625 3016 14 5 1200 FILTER DODE SW 7013 2329 700 SEE SCHEMATIC 0000 2312 400 MT WT BR a T HIGH LEVEL AMP 7005 2372 500 SEE SCHEMATIC 0000 237 1 800 mE FL afte PWR MOMTOR ASSY 7008 2373 700 SEE SCHEMATIC zi 0000 2377 200 FIRST MIXER ASSY 005 2375 300 SEE SCHEMATIC FL 0000 2376 000 AIAIB XMTR SENSOR 7005 2347 000 SEE SCHEMATIC Y 0000 2377 300 AlAs Figure 6 2 AN GRM 114 interconnect 1 Schematic diagram sheet 2 of 2 6 9 6 10 blank r AIAI FRONT PANEL ASSY 7005 2377 700 1 LAST REF NO USED AISFI AIAGFLI 2142073 AIASWIS AlBPQ AIAICR2 AIA2P2 AJA2462J3 SAIDIS AIAISAIFLI AIA24ASP 2 ALL RESISTORS ARE I 8w 10 UNLESS OTHERWISE NOTED ALL RESISTANCE IS EXPRESSE D IN UNLESS OTHERWISE NOTED 4 CONTACT ARRANGEMENT FOR A A 53 6 BANDWIDTH Ea 03 a
103. RESISTANCE IS EXPRESSED IN OHMS UNLESS OTHERWISE NOTED IN4i48 4 ALL CAPACITANCE IS EXPRESSED IN PICOFARADS UNLESS OTHERWISE NOTED 5 ALL REF CARRY AN ASSIGNED DESIGNATOR SERIES 9 4 THIS SCHEMATIC CARRIES SERIES AIASAl AIASAIAR THEREFORE RI 18 DESIGNATED AIASAIAIRD 2601 602 OUT 12401 ON MULT MIXERY HF LOCK BD 5 5 ee ee D FLIP FLOP 1 ls 1 7 AMP 2 PRESCALER AS8Y cw L 7024 2322 500 _ i assy l De ee Dj 1007008400 E HET AMP 2 PRESCALER 77760 ASSY AMP 2 PRESCALER assy Wu bn EROR CEN a MI LC za Za 1 _ _ 2044 3222 00 _ _ Figure 6 6 amplifier 2 prescaler A1A3A1 schematic diagram 6 19 6 20 blank NOTES 1 LAST REF NO USED AIASAZAI CRE EU 2 ALL RESISTORS ARE 1 8 W UNLESS OTHERWISE NOTED 3 ALL RESISTANCE EXPRESSED IN OHMS UNLESS OTHERWISE NOTED 4 ALL CAPACITANCE 5 EXPRESSED IN PICO FARADS UNLESS OTHERWISE NOTED 5 L2 L3 L4 L5 4L6 ARE IBOO 2359 700 6 17 FORMED BY THE STRAY INDUCTANCE OF A 0 1 LENGTH OF 22 AWG BUS WIRE ALL REF NOS CARRY AN ASSIGNED DESIGNATOR SERIES eg THIS DWG CARRIES SERES amp THEREFORE IS DESIGNATED A ASAZAIRID DRAFTSMAN NOTES ON SHT I BECOMES AE
104. SET SIG GEN TO 111 0 MHz 30 AM MODULATION 1 kHz SET OUTPUT LEVEL TO 87 dBm 10 SET VOL CONTROL FOR COMFORT ABLE LEVEL OF AUDIO TONE CLEAR AUDIO TONE HEARD NO YES SET FOCUS amp N TENSITY FOR CLEAN SHARP TRACE ON CRT SET VERT TO CENTER DISPLAY CLEAN SHARP AM SIG ON CRT YES NO SET SIG GEN TO FM 4KH2 DEVN SET OUTPUT LEVEL TO 87 dBm 10 SET AM FM SWITCH TO FM SET DEV PWA SWITCH AND EXT V DIV SWITCH TO 6 kHz METER READS 4 kHz 1 MIN DIV YES CRT SHOWS 4 kHz DEVN 1 MIN DIV YES REMOVE COAX CABLE FROM ANT INPUT JACK SET 1 5 5 15 kHz SWITCH TO 1 5 kHz SET HI LVL NORM SWITCH TO X 100 SET BFO SWITCH TO BFO NO NO TO 45 dBm 515 ON CRT METER READS YES TURN RF LEVEL BFO INJECTION DIAL cw TO 80 dBm YES SET HI LVL NORM SWITCH TO NORM IS NO 75 85 dBm SIG ON CRT YES SH 2 5 2 AN GRM 114 performance test sheet 1 of 13 SET FREQUENCY MHz SWITCHES TO 120 200 0 SET RCVR wIDE NARROW SWITCH TO WIDE TURN SOUELCH CONTROL ccw TO DETENT STOP DO NOT TURN OFF TURN RF LEVEL INJE DIAL ccw TO 05 WIDE NARROW SWITCH IS SET TO WIDE SET RCVR WIDE NARROW SWITCH TO NARROW NO INPUT LEVEL LAMP IS OFF TURN RE LEVEL T DIAL S
105. SIGNAL GENERATOR RF AN USM 308 V 1 U 6625 00 412 3470 TRIPLE OUTPUT POWER SUPPLY LAMBDA LPT 7202FM 80103 POWER SUPPLY LAMBDA LK2351FM 80103 WATTMETER AN URM 120 6625 00 813 8430 MODULATION ME 57 U 6625 00 647 3737 MODULATED POWER SOURCE SAGE 243C ASSY BATTERY LOAD BOX IFR 1003 9801 600 51190 TEST LEAD BNC TO SMB 2 IFR 6050 0032 400 51190 TEST LEAD BNC TO SMA 2 IFR 6050 0092 400 51190 TEST LEAD BNC TO BNC 2 IFR 6050 0522 400 51190 CONNECTOR SMB IFR 2200 0250 100 51190 ADAPTER SMB JACK TO JACK IFR 2123 0000 016 51190 ADAPTER SMA JACK TO JACK IFR 2200 0110 100 51190 HIGH FREQUENCY MULTIPLIER MIXER SNIFFER IFR 6500 9801 700 51190 EXTENDER CABLE 9 PIN IFR 6046 9801 800 51190 TEST LEAD SMB TO SMB 2 IFR 6050 0042 220 51190 TOOL KIT ELECTRONIC EQUIPMENT 100 6 5180 00 605 0079 CONNECTOR BNC TO N 2 IFR MODIFIED 1 4 INCH NUT DRIVER IFR XONNECTOR SMA TEE IFR TEST SET RADIO AN GRM 114 VARIABLE ATTENUATOR TEXSCAN RA 52 230 42 HIGHT VOLTAGE PROBE CALIF INSTRUMENT HV 30 12897 VSWR BRIDGE WILTRON 60 N50 87807 SWEEP SIGNAL GENERATOR WAVETEK 2002 73338 TRACKING GENERATOR SG 1125 U 6625 00 185 4802 500 TERMINATION IFR 2650 0010 200 51190 R F POWER METER WITH POWER DETECTOR HEAD 42BD 04901 41 41A 04901 COMP ASSY AGC MONITOR METER IFR 7003 9801 500 51190 Resistor 390K 1 1 4 W IFR 4702 0394 003 51190 PCB ASSY
106. Storage Administrative storage of equipment issued to and used by Army activities will have preventive maintenance performed in accordance with the PMCS charts before storing When removing the equipment from administrative storage the PMCS should be performed to assure operational readiness Disassembly and repacking of equipment for shipment or limited storage are covered in paragraph 5 7 1 5 Destruction of Army Electronics Materiel Destruction of Army electronics materiel to pre vent enemy use shall be in accordance with TM 750 244 2 Section IL DESCRIPTION AND DATA 1 6 Purpose Test Set Radio hereinafter referred to as Communications Service Monitor ANK2RM 1 14 AN GRM 1 14 is a compact light weight portable maintenance instrument which provides test and measurement capabilities to effectively test and ser vice a variety of avionics and communications equipments 1 7 Use The AN GRM 114 contains an internal rechargeable battery pack and can be used almost anywhere without concern for immediate power It can also be operated from an ac line voltage or an external dc source 1 8 Description and Capabilities The AN GRM 114 incorporates the functions of an FM AM sig nal generator FM AM receiver RF spectrum analyzer oscilloscope audio generator power monitor and a multimeter These functions per mit the test set to perform general diagnostic tests end transmitter receiver performance tests 1 9 Equipm
107. TABLE 5 6 FREQ SELECT INPUT TO V C O TUNER BO PRO PER AT 1 11 PROBLEM INDICAT ED WITH V C O TUNER BD TURN POWER OFF RE PLACE A1A11 TURN POWER ON PROBLEM INDICAT ED WITH MASTER OSCILLATOR TURN POWER OFF REPLACE A1A3UT1 TURN POWER ON MEASURE SIGNAL AT A1A3A5J1 WITH SA 5 dBm TO 5 dBm PROBLEM INDICAT ED WITH MASTER OSCILLATOR OUT PUT DISTRIBU TION ANPLIFIER TURN POWER OFF REPLACE A1A3A5 TURN POWER ON Figure 5 5 Receiver troubleshooting sheet 7 of 14 5 50 ADJUST EXTER NAL D C V vco SO THAT F yco IS IN 100 MHZ TO 300 MHz RANGE DISCONNECT A1A3A2J1 FROM 2 1 MEASURE SIGNAL 1 2 4 SUBSTITUTE EX TERNAL D C v yco TO A1A3 A2J2 VARY FROM 0 TO 30 V dc 5 dBm TO 13 dBm gt 1200 2200 MHz MEASURE SIGNAL AT A1A9J1 WITH SA PROBLEM INDICAT wiTH 1200 2200 MHz OSCILLATOR TURN POWER OFF Fe MEASURE SIGNAL 2 8 dBm AT A1A3A2J3 YES WITH SA REPLACE 2 8222 TURN LA NO MEASURE SIGNAL AT A1A3A1J1 WITH SA BANGE ATA3 A7 4204 7 PROBLEM INDICAT ED WITH 1200 2200 YES MHz OSCILLATOR 45 dBm TO 55 TURN POWER OFF AT A1A3A1 REPLACE A1A3A2 TN J1 TURN POWER ON NO PROBLEM INDICAT ED W
108. TOS Det NO RELAY DRIVER A1A25 IS BAD SET PWR OFF SWITCH OFF SET PWR OFF SWITCH i 5 i Figure 5 8 RF signal generator troubleshooting sheet 6 of 19 TM 11 6625 3016 14 Pa TES POINT FE MONITOR 7 IS BAD r PWR OFF SWITCH OFF pos REPLACE SET PWR OFF BATT SWITCH TO PWR 5 77 TM 11 6625 3016 14 ISIT 26 dBm TO 34 dBm MEASURE SIGNAL AT 20 1 WITH SA MEASURE SIGNAL AT A1A19J1 WITH SA 120 MHz 16 dBm TO 24 dBm NO YES MEASURE SIGNAL AT A1A20J5 WITH SA 1079 9 MHz 4 dBm TO 10 dBm NO YES 2ND MIXER A1A20 IS BAD SET PwR SWITCH REPLACE A1A20 SET PWR OFF BATT SWITCH TO PWR Figure 5 8 RF signal generator troubleshooting sheet 7 of 19 5 78 MEASURE SIGNAL AT A1A24A3J2 WITH SA YES ATTENUATOR IS BAD SET PWR OFF BATT SWITCH OFF CHECK WIRING PROBLEM IN DICATED IN 2ND LOCAL OSCILLA TOR SH 10 FM AM GENERATOR A1A24A3 IS BAD SET PWR OFF BATT SWITCH OFF REPLACE A1A24A3 SET PWR QFF BATT SWITCH PWR REPLACE A1A11 SET FWR OFF BATT SWITCH TO PWR 111 1 MHz 17 dBm TO 20 dBm YES NO MEASURE SIGNAL AT A1A19J4 WITH SA SH 9 MEASURE SIGNAL AT A1A17P2 WITH SA
109. UUT CONNECTORS When applying power to oscillo scope or spectrum analyzer from PWR OFF BATT switch or AC DC OFF switch make sure IN TENSITY control is in moderate left position AC OC OFF PWR OFF BATT TM 11 6625 3016 14 Table 4 16 Audio Generation with Oscilloscope Operating Instructions Continued Step Procedure Illustration 5 Adjust INTENSITY control cw and FOCUS control appropriately for a sharp visible trace display NOTE INTENSITY Warmup time of crt is ap proximately 30 seconds from a cold startup trace display will not become visible until crt achieves warmup FOCUS 6 Adjust VERT and HORIZ controls so that the trace is centered and aligned along major horizontal axis 4 55 TM 11 6625 3016 14 Table 4 16 Audio Generation with Oscilloscope Operating Instructions Continued Illustration Procedure 7 Set MODULATION FREQ Hz thumb wheels to desired audio frequency 8 For calibration the level of the injected audio tone must be expressed in volts peak to peak Volts rms or volts peak must be converted to volts peak to peak using following formulas volts peak to peak 2 828 x volts rms volts peak to peak 2 x volts peak 9 Rotate INT MOD Control to adjust wave form to desired amplitude in volts peak CRT DISPLAY 4 56 TM 11 6625 3016 14 Table 4 16 Audio Generation with Oscilloscpe Operating Instructions Continued Step Procedure
110. VOLT AGES REFER TO TABLE 3 TABLE 3 TEST POINT VOLTAGE ACCEPTABLE RANGE 2 12 V dc 4120 TO 4125 V dc 480 TO 45 25 V dc ATABATFLA 37 0 TO 44 0 V dc ARE VOLTAGES PROPER YES SET PWR QFF NO SET BATT SWITCH TO OFF UNPLUG CONNECT A1A2P2 LINE CORD FROM A1A2J2 AC OUTLET DUTY CYCLE REG ULATOR ASSEM BLY A1A8A1 IS BAD REMOVE D C R ASSY AND INSTALLA GOOD ONE SET PWR QEF BATT SWITCH TO PWR IS 12 TO 125 V dc AT A1A2J2 PINS 23 26 RETURN TO ON YES SHEET 1 NO 15 12 125 2 Figure 5 3 Power supply troubleshooting sheet 4 of 16 5 24 4 7 TO YES 5 25 dc AT SWITCH TO A1A2P2 PINS 7 172 NO IS 4 7 TO YES 5 25 V dc A1A8A1FL3 NO SET PWB QEE BATT SWITCH TO OFF EXCESSIVE DE MAND ON 5 V de SUPPLY REFER TO MOTHER BOARD INTERCONNECT DIAGRAM SET PWR QEE BATT SWITCH TO OFF UNPLUG LINE CORD FROM AC OUTLET SH 5 SET PWB QEF BATT SWITCH TO OFF UNPLUG AC LINE CORD FROM OUTLET DISCHARGE FILTER CAPACITORS CHECK WIRING FROM A1A8A1J1 TO A1A2P2 WITH OHMMETER REPAIR OR RE PLACE AS NECESSARY SH5 RETURN TO ON SHEET 1 YES NO DISCHARGE FIL TER CAPACITORS REFER TO MOTHER BOARD INTER CONNECT DIA GRAM
111. analyzer is not in use EXT V DIV control Controls oscilloscope vertical sensitivity and input source applied to oscilloscope as follows EXT V DIV positions Selects oscilloscope ver tical sensitivity in indi cated voltage increments per graticule division for signals appliedto SCOPE IN connector KHz positions Oscilloscope displays fre quency deviation in FM mode or modulation en velope in AM mode NOTE If EXT control is 15 or 1 5 KHz position frequency deviation is read on left hand vertical scale If control is in 6 KHz position fre quency deviation is read on right hand vertical scale If viewing modu lation in AM mode the position of EXT V DIV in the KHz range is irrelevant 4 8 TM 11 6625 3016 14 Table 4 1 AN GRM 114 Controls Indicators and Connectors Continued Control indicator or connector Function EXT V DIV vernier control Permits variation of oscilloscope vertical sensitivity within any of the ranges provided by EXT V DIV control in CAL position fully cw detent os cilloscope vertical graticule divisions are equal to setting of EXT V DIV control NOTE Do not make voltage measurements with EXT V DIV vernier control out of CAL position FREQUENCY MHz thumbwheels Selects frequency of signal generator or receiver NOTE Left hand thumb wheel selects freq uency in 100 MHz steps Right hand thumbwheel selects frequency in 100 Hz steps 1 5 5 15 KH
112. assemblies which are interactive with the functioning of other assemblies When these assemblies are replaced as part of faults found while using the performance tests or troubleshoot ing tests the interactive assembly or assemblies must be aligned or adjusted Table 5 10 is a list ing of assemblies which when adjusted aligned or replaced require that other assemblies also be aligned or adjusted If in the performance of these alignment procedures adjustment does not achieve the required values refer to the troubleshooting procedures of paragraph 5 6 When the required values have been achieved and the appropriate alignment procedures have been performed re turn to the beginning Figure 5 2 AN GRM 114 Performance Test Table 5 10 AN GRM 114 Assemblies and Interactive Assemblies Assembly Heterodyne Amplifier 2 Prescaler A1A3A1 1200 2200 MHZ oscillator A1A3A2 A G C System A1A3A3 108 MHz Filter A1A5 1200 MHz Amplifier A1A6 Static Discharge Protector A1A7 Duty Cycle Regulator A1A8A1 High Frequency Phase Lock A1A9 VCO Tuner A1A11 250 KHz Monitor Audio A1A13 Regulator and Power supply A1A14 1080 MHz Multiplier Amplifier A1A15 1200 MHz Diode Switch A1A16 5 112 Align or adjust assembly VCO Tuner A1A11 VCX3 Tuner A1A11 a VCO Tuner 41 411 b High Frequency Multiplier Mixer A1A26 1080 MHz Multiplier Amplifier A1A15 250 KHz 1 Monitor Audio A1A13 b
113. by setting the operating characteristics to the speci fied parameters f Calibrate To determine the corrections to be made in the readings of instruments or test equipment used in precise measurement Consists of the comparison of two instruments one which is a certified standard of known accuracy to detect and adjust any discrepancy in the accuracy of the instrument being compared with the certified standard INTRODUCTION Install To set up for use in an opera tional environment such as an encampment site or vehicle h Replace To replace unserviceable items with serviceable like items i Repair To restore an item to service able condition through correction of a specific failure or unserviceable condition This function includes but is not limited to welding grinding riveting straightening and replacement of parts other than the trial and error replacement of running spare type items such as fuses and indi cators Overhaul Normally the highest degree of maintenance performed by the Army in order to minimize time and assure that work in process is consistent with quality and economy of opera tion It consists of that maintenance necessary to restore an item to completely serviceable condition as prescribed by maintenance standards in techni cal publications for each item to like new zero mileage or zero hour condition k Rebuild The highest degree of material maintenance It consists of restoring equi
114. check that the display on the spec trum analyzer is stable with no oscillations If the check performed in step 7 is not correct adjust A1A15TU1 and A1A15TU2 until the display is stable Turn power off remove the coaxial cable and SMB jack to jack adaptor Connect plug A1A20P5 to jack A1A20J5 on the Second Mixer Reassemble the AN GRM 114 e 250 KHz Monitor Audio 250 KHz I F Monitor Audio A1A13 is aligned using the following procedure 1 Remove all power from the AN GRM 2 114 and disassemble the unit to gain access to the 250 KHz I F Monitor Audio A1A13 module Connect AN GRM 114 115 volt ac power cord to a 115 volt ac power source and set the front panel con trols as listed Control Setting GEN RCVR RCVR RCVR WIDE MID NARROW NARROW FREQUENCY MHz 1202000 SQUELCH OFF Fully ccw to de tent not off INT MOD RCVR RCVR AM FM AM VOL Fully ccw 1 5 5 15 KHz 15 KHz AUTO ZERO BATT AUTO EXT V DIV 15 EXT vernier CAL SWEEP 0 1 mS DEV PWR SIG PWR OFF BATT PWR 3 Connect a coaxial cable between ANT INPUT jack and the ref signal generator output Set the rf signal generator for an out put frequency of 120 2 MHz with an output level of 110 dBm and a mod ulation of 1 kHz at 30 Check that the ANT INPUT LEVEL lamp lights If the lamp does not light adjust A1A13R8 until the lamp just lights Set RCVR WIDE MID NARROW switch to WIDE Check that the ANT INPUT L
115. connector must not exceed 0 25 W Maximum input is 30 dBm for proper spectrum analyzer operation signals above 30 dBm may cause spurious sig nals to be generated and dis played by AN GRM 114 Select one of the following methods of signal reception a External antenna Connect external antenna 10 ANT INPUT connector for off the air monitoring Proceed to step 3 CAUTION Do not apply more than 20 watts of continuous input to TRANS RCVR connector b Direct Cable Connection from UUT Connect cable from UUT to TRANS RCVR connector Maximum operating ON time for mea surement of transmitter output using TRANS RCVR connector 15 10 seconds at 100 W 15 duty cycle 20 seconds at 50 W 30 duty cycle or 2 minutes at 30 W 50 duty cycle Apply power to UUT if applicable Instructions Continued Illustration TRANS RC TM 11 6625 3016 14 Table 4 10 Receiver Operating Instructions Continued Step Procedure Illustration 3 Set FREQUENCY MHz thumbwheels to frequency of signal to be received O P M 7 FREQUENCY MHz 7 2 gt Q J 4 Adjust VOL control to a comfortable listening level 4 31 TM 11 6625 3016 14 Step 5 Table 4 10 Receiver Operating Instructions Continued Procedure If an area of the spectrum is being moni tored where frequency channels are packed closely together bandwidth of signal may be reduced by plac
116. dc AT A1A9 FL30 PROBLEM IS IN OICATED WITH HIGH FREQ PHASE LOCK P C BD PROBLEM INDICAT ED WITH INDICA TOR LAMP CHECK BULB WIRING i HEPLACE AS TURN POWER OFF NECESSARY REPLACE A1AO9 TREE TURN POWER 15 Receiver troubleshooting shet 5 of 14 TM 11 6625 3016 14 MEASURE VOLT Fc FREQ MEASURE SIGNAL AGE AT APPROPRI AND AMPLITUD AT A1A26J1 WITH ATE PIN OF SH AN SA A1A26P4 REFER Pu TO TABLE 56 100 MHz 42 SWITCHING dBm TO 10 dBm VOLTAGE AT AP AT A1A26 PROPRIATE PI J1 OF P4 REMOVE SCREWS PROBLEM INDICAT SECURING LOWER ED WITH HIGH FLOOR ASSY FREQ MULT SWING LOWER MIXER TURN FLOOR OUT TO POWER OFF RE ALLOW ACCESS TO PLACE A1A26 TEST POINTS TURN POWER ON MEASURE SIGNAL MEASURE SIGNAL AT A1A24A1J2 AT A1A24A1J1 WITH SA WITH SA 100 10 MHz 4 MHz dBm TO 8 dBm 21 SH7 AT A1A24 ATA24 7 A1J1 A1J2 PROBLEM INDICAT ED WITH 100 MHz MULT 108 MIXER TURN POWER OFF REPLACE A1A24A1 TURN POWER ON PROBLEM INDICAT ED WITH 100 MHz FILTER TURN POWER OFF RE PLACE A1A21 TURN POWER ON Figure 5 5 Receiver troubleshooting sheet 6 of 14 5 49 TM 11 6625 3016 14 PROBLEM INDICAT ED WITH FREQ SELECT SWITCH TURN POWER OFF REPLACE A1A27 TURN POWER ON REFER TO
117. desired tone modulation frequency 4 22 TM 11 6625 3016 14 Table 4 6 RF Signal Generator operating Instructions for FM RF Signals Continued step Procedure Illustration 4 Place DEV PWR control to desired devia tion range 2 6 or 20 KHz DEV PWR 5 Rotate INT MOD OFF control cw while observing DEVIATION KHz WATTS meter until meter indicates desired de viation on appropriate scale The AN GRM 114 is now generating frequency modulated rf signals within the desired deviation range NOTE If deviation is above 5 kHz P place RCVR WIDE MID NARROW switch to MID or WIDE position Be Da 3 Signals at a 1 kHz rate with Rug De more than 5 kHz deviation au ua must be monitored with ios k RCVR WIDE MID NARROW CAES 2 5 n i switch in MID position INT MOD OFF Ta a Se we Signals modulated above 2 DEVIATION kHz should be monitored RCVR WIDE MID NARROW with RCVR WIDE MID NARROW switch in WIDE position Note residual mod ulation indication due to noise on DEVIATION KHz WATTS meter add this value to desired value 4 23 TM 11 6625 3016 14 Ste 4 5 Oscilloscope Operating Instructions lists the initial adjustments and control settings necessary to display a trace Table 4 6 RF Signal Generator Operating Instructions for FM R F Signals Continued Procedure Illustration Emergency operating procedures For emergency operating proce
118. equivalent signal strength in uV multiply setting of RF LEVEL BFO INJEC TION dial by 100 RF LEVEL BFO INJECTION HI LVL UV X 100 NORM Table 4 13 Spectrum Analyzer Operating Instructions for Spurious Signal Detection Step Procedure Illustration 1 Return controls and indicators to the set tings listed in table 4 11 NOTE Remove any static discharge from an unterminated antenna before connecting to the AN GRM 1 14 4 43 TM 11 6625 3016 14 Table 4 13 Spectrum Analyzer Operating Instructions for Spurious Signal Detection Continued Step Procedure Illustration 1 CAUTION Cont Do not connect transmitter to ANT INPUT connector Con nect only external antenna to ANT INPUT connector Maximum continuous input to ANT INPUT connector must not exceed 0 25 W Maximum input to ANT INPUT connector is 30 dBm for pro per spectrum analyzer operation signals above 30 dBm may cause spurious signals to be generated and displayed by AN GRM 114 ANT INPUT TRANS RCVR If signal is to be monitored through a UUT via a direct cable connection to TRANS RCVR connector do not ap ply more than 20 watts of CONTINUOUS input to TRANS RCVR connector Maximum operating ON time for measurement of transmitter output using TRANS RCVR connector is 10 seconds at 100 W 15 duty cycle 20 seconds at 50 W 30 duty cycle or 2 minutes at 30 W 50 duty cycle 2 Connect external antenna
119. frame support member 129 figure 5 46 Remove Regulator Power Supply PCB 10 from Mother Board 12 5 46 one Phillips screw 13 top of standoff 14 which secures VCO PCB retainer 15 to standoff 14 figure 5 46 Move retainer 15 out of the way to allow removal of VCO 16 figure 5 46 Tag and disconnect coax cables from PCB 16 5 46 Remove PCB 16 from Mother Board 12 figure 5 46 TM 11 6625 3016 14 8 Tag and disconnect coax cables from High Frequency Phase Lock PCB enclosure 18 figure 5 46 9 Remove five slotted nuts 153 and lockwashers 17 from underside of Mother Board 12 which secure PCB enclosure 18 to Mother Board 12 Remove hex nut from three coax con nectors which secure PCB 19 to en closure 18 figure 5 46 10 Remove PCB enclosure 18 from Mother Board 12 Remove PCB 19 from Mother Board 12 5 46 11 Tag and disconnect coax cable from 79 80 MHz Loop PCB enclosure 20 figure 5 46 12 Remove four slotted nuts 154 and four lockwashers 157 from under side of Mother Board 12 which se cure PCB enclosure 20 to Mother Board 12 Remove hex nut from coax connector which se cures PCB 21 to enclosure 20 figure 5 46 13 Remove PCB enclosure 20 from Mother Board 12 Remove PCB 21 from Mother Board 12 figure 5 46 14 Remove two Phillips screws 72 and
120. from lid d Remove ac and dc power cables from inside of lid along with 90 BNC connector Note additional accessories attached to rear side of retaining plate removed in step c Those accessories include 4 spare fuses 1 antenna 1 Allen wrench Refer toLtable 5 1 for list of items required but not supplied 2 1 11 6625 3016 14 INNER SHIPPING CARTON AN GRM 114 SHIPPING CARTON OUTER SHIPPING CARTON Figure 2 1 AN GRM 114 packaging 2 2 e Determine source of power to be used to energize AN GRM 114 and proceed accordingly 1 AC or DC Power a Connect 6 pin socket on end of furnished ac or dc power cable to 6 pin external power recepta cle on rear of unit b Connect 3 pin grounded plug on opposite end of ac power cable to standard 3 pin grounded ceptacle For dc operation con nect cigarette lighter adapter on opposite end of dc power cable to cigarette lighter socket c Place PWR OFF BATT switch to PWR position to energize set 2 Battery Operation a No power cable connections re quired place PWR OFF BATT switch to BATT position to energize unit f For off the air testing antenna must be connected to ANT INPUT connector on front panel of unit If unit is to operated in an upright position an ten nae may be connected directly to ANT INPUT connector If unit is to rest on its support bracket during operation attach antenna to furni
121. not correct replace FM AM Generator 1 24 and repeat steps 3 through 5 before proceeding 6 10 Remove the digital voltmeter remove from AN GRM 114 reassemble metal shield to FM AM Generator A1A24A3 reapply power to AN GRM 114 set the FREQUENCY MHz thumbwheels to 120 051 0 set the RF LEVEL BFO INJECTION control to 100 dB set the HI LVL NORM switch to 100 uV and connect the coaxial cable between the TRANS RCVR jack and the spectrum analyzer input Check that the spectrum analyzer dis plays a 120 051 MHz signal at 60 1 dB If the spectrum analyzer dis play is not correct adjust A1A24A3 R20 for a display of 120 051 MHz at 60 1 dB Set the GEN RCVR switch to RCVR set the RF LEVEL BFO INJECTION control to 1 set the SWEEP switch to 10 mS and connect the coaxial cable between the ANT INPUT jack and the rf signal generator output jack Adjust the rf signal generator for a 120 05 MHz output with an output level of 100 microvolts Check that the oscilloscope display is as shown in figure 5 13 and the FREQ ERROR indicates full scale deflection to the left If the oscillo scope display and the FREQ ERROR indication are not correct adjust A1A24A3R21 for the proper indica tions Figure 5 13 Zero beat pattern 11 Remove all cables and turn off power unplug power cord and reassemble the AN GRM 1 14 Regulator and Power Supply A1A14 Regulator and Power Supply A1A14 is aligned
122. of AN GRM 114 or output of external signal source Mi INT MOD OUT 4 78 TM 11 6625 3016 14 CHAPTER 5 MAINTENANCE Dangerous voltages exist within the AN GRM 114 while the unit is operating Personnel should be familiar with the requirements of TB 385 4 before attempting main tenance 5 1 General This chapter contains maintenance troubleshoot ing and disassembly reassembly instructions 5 2 AN GRM 114 Routine Maintenance Checks and Services INSTRUCTIONS a Recommended cleaning supplies Dena tured alcohol soft bristle brush lint free cloth and hand controlled dry air jet 80 psi maximum pressure Use air jet cautiously to avoid damaging fragile components b Remove dust and dirt from AN GRM 114 case thumb wheel switches meters and rear panel 5 3 Tools and Test Equipment Table 5 1 lists tools and test equipment necessary to perform the AN GRM 114 maintenance Table 5 1 Tools and Test Equipment Tool or test equipment NOTE Test equipment with equivalent specifications can be substituted for the items listed below Oscilloscope with X10 Probe Frequency Counter Spectrum Analyzer with Plug in module Variable Attenuator Texscan Digital Multimeter High voltage probe Calif Instrument Distortion analyzer Tool number OS 262 P U TD 1225A V 1 U 141T 28480 8555A 28480 Texscan RA 50 23042 AN USM 451 Calif Instrument
123. packaging instructions and to paragraph 12 of chapter 1 for Warranty Information 5 14 Demolition to prevent enemy use Authority for Demolition Demolition of the AN GRM 114 will be accomplished only upon the order of the commander The destruc tion procedure outlined in paragraph b will be used to prevent further use of the equipment h Methods of destruction Any of the methods of destruction given below may be used The time available will be a major determining factor for the method used The tactical situation will determine in what manner the destruction order will be carried out 1 Smash Smash the controls and con nections of the AN GRM 114 with the heaviest tool available if time does not permit removing the AN GRM 114 from its case use sledges axes hammers crowbars and any other heavy tools available to smash the interior of the AN GRM 114 2 Cut Cut cabling and wiring Cut all cables in a number of places use axes ma chetes and similar tools If time permits slash the interior wiring 3 Burn Burn as much of the AN GRM 114 as is flammable use gasoline oil flame thrower or similar tools Bum instruction ture first Pour gasoline on the cut cables and ig nite it Use a flame thrower to burn the spare parts or pour gasoline on the spares and ignite it Use incendiary grenades to complete destruction of the equipment interiors limited Be extremely careful with explo s
124. schematic diagram Power monitor A1A17 schematic diagram Spectrum analyzer A1A18 schematic diagram Spectrum analyzer module no 1 A1A18A1 schematic diagram Oscilloscope inverter board A1A18A2 schematic diagram 4 d b db db d D D 4 D 4 D D d do TM 11 6625 3016 14 vi Figure Re allo 2162 e D co 5 a eo G 0 Co eo J C2 OI IN ee D Number 9 LI alt nolla E co ale On T IN ra En ER TER A um A 4 RIS IAM m o LIST OF ILLUSTRATIONS Continued Title Spectrum analyzer module no 2 A1A18A3 schematic diagram 3 sheets Oscilloscope main circuit board A1A18A4 schematic diagram 2 sheets Spectrum analyzer front plate assembly A1A18A5 schematic diagram First mixer A1A19 schematic diagram Second mixer A1A20 schematic diagram 100 MHz filter A1A21 schematic diagram Battery modified A1A23 schematic diagram 100 MHz amplifier 108 MHz mixer A1A24A1 schematic diagram 120 MHz receiver A1A24A2 schematic diagram 2 sheets FM AM generator A1A24A3 schematic diagram Relay driver A1A25 schematic diagram High frequency multiplier mixer A1A26 schematic diagram Frequency select switch A1
125. secure DEV PWR switch to Front Panel 44 5 47 Remove switch and lockwasher from Front Panel Tag and unsolder wires from HI LVL x 100 NORM switch Remove hex nut 113 and flat washer which secure switch to Front Panel 44 figure 5 47 Remove switch and lockwasher from Front Panel Tag and unsolder wires from AUTO OFF ZERO BATT switch Remove hex nut 86 and flat washer which secure switch to Front Panel 44 figure 5 47 Remove switch and lockwasher from Front Panel Use an Allen wrench to loosen two socket head screws 87 in RF LEVEL BFO INJECTION control knob 88 figure 5 47 Remove knob 88 5 47 Remove two 1 4 Phillips screws from dial attenuator stop 89 5 47 39 43 44 45 46 47 48 49 50 51 11 6625 3016 14 Remove hex nut 127 and dBm Dial 128 from shaft of Dial Attenuator Assembly 91 Then remove one 1 4 Phillips screw which holds dial index attenuator ring 90 to Front Panel 44 figure 5 47 Remove dial index attenuator ring 90 from Front Panel 44 figure 5 47 Disconnect coax connectors from at tenuator Assembly 91 figure 5 47 Remove hex nut and lockwasher which secure TRANS RCVR jack 92 to Front Panel 44 5 47 Remove TRANS RCVR jack 92 from Front Panel 44 figure 5 47 Make sure two pin Molex battery con nector 139 has been discon
126. settings of FREQUENCY MHz thumbwheels in 100 Hz steps until meter needle is centered at zero within 1 minor division on meter scale Setting of FREQUENCY MHz thumb wheels now reflect exact frequency of received signal FREQ ERROR SQUELCH OFF If received signal is being monitored through a direct cable connection at TRANS RCVR connector rotate DEV PWR control to WATTS x 10 If DEVIATION KHz WATTS meter reading is under 10 watts on red scale rotate DEV PWR control to WATTS x 1 D DEVIATION KHz WATTS TRANS RCVR 4 33 TM 11 6625 3016 14 Table 4 10 Receiver Operating Instructions Continued Step Procedure Illustration 8 Output power of UUT can now be measured on red scale of DEVIATION KHz WATTS meter NOTE For signals received off the air a representation of rela tive signal strength can be de termined by observing DEVIA TION KHz WATTS meter needle deflection with DEV PWR control in SIG position As signal strength increases the meter needle deflection will increase toward the right of meter scale For exact measurement of off the air signal strength refer to pro cedures for measuring signal strength under spectrum analyzer operating instruc tions 9 Emergency operating procedures a Broken antenna Remove antenna ANT INPUT connector Remove insulation to expose wire Butt the two separated ends together and secure with any nonconductive ma
127. side of MM 100 Composite Assembly to MM 100 case Separate MM 100 Composite Assem bly from MM 100 Case 5 Remove three 1 2 screws 8 which secure Circuit Board 10 to standoffs 9 on Structural Front Panel figure 5 49 6 Remove two Phillips screws 47 which secure cable 48 to braket 3 figure 5 49 7 Remove two 7 16 Phillips screws 4 two flat washers 5 and two spacers 6 which secure bracket 3 to Front Panel 7 figure 5 49 8 Disconnect two connectors 46 from Circuit Board 10 figure 5 49 9 Tag and unsolder four wires of Cable Assembly 49 from Circuit Board 10 figure 5 49 lo Remove Cable Assembly 49 from Circuit Board 10 figure 5 49 5 12 Reassembly Instructions a General The following procedures pro vide a guide for assembling the AN GRM 114 in cluding all the assemblies herein b Precautions and General Techniques Reconnect all electrical wiring or cables as identi fied Be careful not to damage connector pins when installing mating connectors When neces sary refer to component location diagrams located at the end of the alignment procedures to find referenced connectors jacks and potentiometers c Rear Panel Reassembly 1 Install transformer mounting bracket transformer 67 and two spacers figure 5 46 2 Attach four screws and two ground lugs to Rear Panel 58 which hold transformer mounting bracket and transformer 67
128. that the signal displayed on the CRT is 30 dBm 1 dB the signal displayed is not correct adjust A1A18 A3R5 for the correct signal display 42 Remove all power from the signal generator remove all power from the AN GRM 114 then reinstall the Spec trum Analyzer Assembly A1A18 to the Front Panel Apply power to the AN GRM 114 then to the signal generator 43 Reduce the signal generator output in 10 dB steps from 30 dBm to 100 dBm and check that the signal displayed on the CRT decreases in 10 dB 2 dB steps 44 Set the signal generator for an output of 70 dBm and set the AN GRM 114 FREQUENCY MHz thumbwheels to 1260000 45 Verify that the signal displayed on the CRT is at the fifth major division left of the center graticule 2 minor divi sions If the signal displayed is not correct adjust A1A18A1R37 for the correct signal display 46 Set the FREQUENCY MHz thumb wheels to 125 000 0 and check that the signal displayed on the CRT is at the fifth major division right of the center graticule 2 minor divisions If the signal displayed is not correct adjust A1A18A1R37 for the correct signal display 47 Repeat steps 44 through 46 until the adjustments to A1A18A1R37 are balanced 48 Set the ANALY DISPR control fully and the FREQUENCY MHz thumbwheels to 1305000 49 Verify that the signal displayed on the CRT is at the fifth major division right of the center graticule 2 minor di
129. the smallest negative value for the range When the High Frequency Phase Lock Loop is operating closed loop as in normal operation the value of VCO will correspond to a particular frequency based on the characteristic curve of the 1200 2200 MHz Oscillator When VCO is monitored using a tee connector while the leftmost digit of the FREQUENCY MHz thumbwheels is changed in order through all possible settings VCO should smoothly and continuously increase in negative voltage as Fg increases 5 67 TM 11 6625 3016 14 PRESET AN GRM 114 CONTROLS PER TABLE 5 7 ADJUST FREQ ROR METER TO 0 ZERO ADJ SCREW IS ACCESSIBLE THROUGH HOLE IN FRONT PANEL REFER TO Dis ASSEMBLY ASSEMBLY IN STRUCTIONS TO REMOVE CASE FROM UNIT CAREFULLY RE MOVE CASE REMOVE 250 KHz BOARD FROM MOTHER BOARD CONNECTOR PLUG EXTENDER BOARD INTO MOTHER BOARO CONNECTOR Figure 5 7 5 68 PLUG 13 BOARD INTO EXTENDER BOARD PLUG LINE CORD INTO AC OUTLET SET PWR OFF BATT SWITCH TO PWR ADJUST FRONT PANEL ZERO RCVR TRIMMER SET FREQ ERROR METER TOO SET EREQUENCY MHz ur s TO 060 100 0 ADJUST A1A13R109 TO SET FREQ ERROH METER TO 0 Frequency error measurement troubleshooting sheet 1 of SET EREQUENCY MHz SWITCHES TO 006 000 0 SET 1 5 5 15 KHz SWITCH TO 15 SET EXT V DIV SWITCH TO ADJUST VERT CON TROL TO
130. this connector while set is in generator mode set will automati cally switch to receiver mode RCVR position AN GRM 114 functions as a receiver Signal input 0 1 watt minimum required may be applied through the TRANS RCVR con nector or off the air from an external antenna attached to ANT INPUT connector 10 MHz CAL adjustment Fine tuning adjustment for 10 MHz master oscilla tor frequency 10 MHz REF OUT connector 10 MHz master oscillator output connector EXT SPKR connector Audio output connector for remote speaker or headphones SQUELCH OFF control Squelch threshold adjustment squelch disables audio output when rf input at ANT INPUT connector falls below squelch threshold 4 5 TM 11 6625 3016 14 Table 4 1 AN GRM 114 Controls Control indicator or connector SQUELCH OFF control Continued INT MOD RCVR switch VOL control BFO OFF switch AM FM switch EXT connector EXT MOD connector INT MOD OUT connector 4 6 Indicators and Connectors Continued Function NOTE SQUELCH control is OFF when fully ccw in detent position When out of detent position rotate con trol cw to increase squelch threshold or ccw to decrease threshold The greater the squelch threshold the greater the signal input required to break the threshold Couples receiver or dual tone generator audio out put to internal speaker through VOL control Controls audio output level of internal s
131. to 25 dB ADJUSTMENT TU5 TUA TU3 TU2 TU1 Selected tune pulse 15 Reconnect the power cord to its 4 Apply power and set spectrum analy power source and turn power on 16 Insert the high frequency sniffer to the center of the A1A26 assembly and repeat steps 9 through 12 17 Remove the high frequency sniffer and coaxial cable turn power off and remove power cord from its power source Reassemble the AN GRM 114 and install fuse A1A8F3 18 d 1080 MHz Multiplier Amplifier A1A15 1080 MHz Multiplier Amplifier A1A15 is aligned using the following procedure 1 Remove all power from the AN GRM 114 and disassemble the unit to gain access to 1080 MHz Multiplier Ampli fier A1A15 and Second Mixer A1A20 2 Tag and remove plug A1A20P5 from jack A1A20J5 on Second Mixer A1A20 and connect to SMB jack to jack adaptor 3 Connect coaxial cable from SMB to jack adaptor and the spectrum analyzer input 5 116 9 10 11 zer controls for a center frequency of 1080 MHz and a 10 dB reference level Check that the spectrum analyzer displays 1080 MHz at 4 dB or greater and that all harmonics are at least 50 dB below the level of the 1080 MHz signal If the check performed in step 5 is not correct adjust A1A15 TU1 and A1A15 TU2 tuning screws on the 1080 MHz cavity filter to obtain maximum amplitude of the 1080 MHz signal Set the PWR OFF BATT switch to OFF and then back to PWR and
132. to ANT INPUT connector for off the air monitoring 4 44 TM 11 6625 3016 14 Table 4 13 Spectrum Analyzer Operating Instructions for Spurious Signal Detection Continued Step Procedure Illustration 3 Apply power to UUT if applicable CAUTION INTENSITY When applying power to spectrum analyzer or oscilloscope from PWR OFF BATT switch or AC DC OFF switch make sure INTENSITY control is in moderate left position 4 Adjust INTENSITY control cw FOCUS control appropriately for a sharp visible DISPLAY D trace on crt AC DC OFF LUN 5 NOTE PWR OFF BATT Warmup time of crt is ap proximately 30 seconds from a cold startup trace dis play will not become visible until crt achieves warmup 5 Set FREQUENCY MHz thumbwheels to desired center frequent y 4 45 TM 11 6625 3016 14 Table 4 13 Spectrum Analyzer Operating Instructions for Spurious Signal Detection Continued Step Procedure Illustration 6 Momentarily remove and reapply power to UUT or in case of a transmitter spectral purity check key transmitter on and off while carefully observing carrier signal and surrounding span for any spurious signals NOTE When interrupting power to UUT or keying transmitter on and off certain momentary spikes which protrude above the noise level may appear Disregard these momentary spikes look for signals which remain con stant in amplitude during this
133. to the Regulator and Power Supply A1A14 module 2 Obtain an rf power source capable of providing 50 watts of power and record the type of modulation the deviation and frequency of the rf power source CAUTION Connect the OUTPUTT of the 10 dB pad to ONLY the TTANS RCVR jack Connection to any other jack will cause severe damage to the AN GRM 114 4 Connect a coaxial cable between the rf power source and the INPUT of the 10 dB pad and a coaxial cable be tween the OUTPUT of the 10 dB pad and the AN GRM 114 TRANS RCVR jack b on or key the 50 watt rf power source and check for an indication of 5 watts or the DEVIATION KHz meter If the indication 011 the DE VIATION KHz meter is not correct adjust A1A14R36 for a 5 watt indica tion 6 Turn off or unkey the 50 watt rf power sourc set the DEV PWR switch to X10 WATTS and remove the coaxial cables and the 10 dB pad 7 Connect the coaxial cable between the output of the 50 watt rf power source 5 121 TM 11 6625 3016 14 i Spectrum Analyzer A1A18 and the TRANS RCVR jack on the AN GRM 114 Turn on or key the 50 watt rf power source and check that the DEVIA TION KHz meter indicates 5 If the DEVIATION KHz indication is not correct adjust A1A14R34 for 5 on the meter Turn off all power remove all cables and test instruments and reassemble the AN GRM 114 Spectrum Analyzer A1A18 is aligned using the following procedure
134. two lockwashers 73 which secure 250 kHz Monitor Audio Circuit Board retainer 74 to Frame Support Member 25 15 Remove two 3 8 Phillips screws 27 and two lockwashers 28 which se cure 250 kHz I F Monitor Audio Circuit Board guide mounting plate 29 to 1200 MHz Diode Switch High Frequency Multiplier Mixer mounting bracket 30 figure 5 46 16 Remove 250 kHz Monitor Audio PCB 32 from Mother Board 12 figure 5 46 17 Tag and disconnect coax cables from 1080 MHz Multiplier Amplifier As sembly 33 figure 5 46 5 159 TM 11 6625 3016 14 5 160 18 19 20 21 22 23 24 25 26 27 28 29 90 Tag and unsolder wire from feed thru capacitor on assembly Remove one 1 8 Phillips screw one 5 32 Phillips screw and one lock washer which secure assembly 33 to mounting bracket 34 figure 5 46 Remove assembly 33 from mounting bracket 34 figure 5 46 Tag and disconnect coax cables from 1200 MHz Amplifier Assembly 36 figure 5 46 Tag and unsolder wire from feed thru capacitor on assembly 36 figure 5 46 Remove four Phillips screws and four lockwashers from underside of Mother Board 12 which secure assembly 36 to Mother Board figure 5 46 Remove assembly 36 and mounting bracket 34 from Mother Board 12 figure 5 46 Tag and disconnect coax cables from High Level Amplifier Assembly
135. wrench to HORIZ control 112 figure 5 46 Attach socket head screws to SWEEP control 109 Attach control 109 hex nut 110 and washer 111 fig ure 5 46 11 Attach socket head screws with Allen 12 h 1 2 5 wrench to SWEEP Vernier control 108 Attach control 108 Attach hex nut 113 and washer 114 figure 5 46 to AC DC OFF switch on Front Panel 47 Lower Floor Reassembly Install 120 MHz Receiver 56 to Lower Floor 52 figure 5 46 Attach two 1 4 Phillips screws four lockwashers and two flat wash ers which hold 120 MHz Receiver 56 to Lower Floor 52 46 ol Install tagged coax cables to 120 MHz Receiver 56 Install circular connec tor 142 to mating connector figure 15 46 Install tagged cables to 100 MHz Amplifier 108 MHz Mixer 55 figure 5 46 Install 100 MHz Amplifier 108 MHz Mixer 55 to Lower Floor 52 figure 5 46 Attach two 1 4 Phillips screws two lockwashers and two flat washers which hold 100 MHz Amplifier 108 MHz Mixer 55 to Lower Floor 52 figure 5 46 Install tagged coax cables to FM AM Generator 54 Install circular con nector to mating connector 141 figure 5 46 Attach two 1 4 Phillips screws two lockwashers and two flat washers which hold FM AM Generator 54 to Lower Floor 52 figure 5 46 Close Lower 46 Floor 52 figure 44 10 Attach two screws 15
136. 0 Check that the FREQ ERROR KHz meter and oscilloscope indicate 1 0 1 kHz If the FREQ 23 24 25 26 27 28 ERROR KHz meter indication is not correct adjust A1A13R42 for a read ing of 1 0 1 kHz If the oscillo scope indication is not correct adjust A1A13R44 for a trace that is 1 0 kHz Set FREQUENCY MHz thumbwheels to 0000000 and set the GEN RCVR switch to GEN Check that the FREQ ERROR KHz meter indicates 0 If the FREQ ER ROR KHz meter indication is not correct adjust the ZERO RCVR screwdriver adjustment for 0 Set the GEN RCVR switch to RCVR set DEV PWR switch to 2 KHz and set the AUTO ZERO BATT switch to AUTO Check that the DEVIATION KHz meter indicates O If the DEVIATION KHz meter indication is not correct adjust A1A12R71 for a reading of Set the GEN RCVR switch to GEN and check that the DEVIATION KHz meter indicates 0 If the DE VIATION KHz meter indication is not correct adjust A1A13R81 for a reading of 0 Connect the coaxial cable between the TRANS RCVR jack and an ex ternal modulation meter set the FREQUENCY MHz thumbwheels to 120000 0 set the EXT V DIV switch to 15 KHz set RCVR WIDE MID NARROW switch to WIDE set the HI LVL NORM switch to HI LVL and set the DEV PWR switch to 20 KHz NOTE When performing step 29 if necessary to obtain an indication 0 1 the dial the modulation meter adjust RF LEVEL BFO INJECTION
137. 0 dBm 1 dBm Oscilloscope and spectrum TM 11 6625 3016 14 SH 2 SH 2 59 NO TO 61 dBm SH 7 analyzer troubleshooting sheet 6 of 7 SH 2 5 63 TM 11 6625 3016 14 REDUCE OUTPUT OF SIGNAL GEN ERATOR TO 90 dBm SET OUTPUT OF SIGNAL GENERA TOR TO 70 dBm VERIFY DISPLAY ED SIGNAL 15 90 dBm 1 dBm VERIFY DISPLAY ED SIGNAL LEVEL 15 70 dBm 41 dBm SH 2 OSCILLOSCOPE AND SPECTRUM ANALYZER WORKING PRO PERLY REDUCE OUTPUT OF SIGNAL GEN ERATOR TO 80 dBm END OF OSCILLO SCOPE AND SPEC TRUM ANALYZER TROUBLE SHOOTING VERIFY DISPLAY ED SIGNAL LEVEL IS 80 dBm 1 dBm Figure 5 6 Oscilloscope and spectrum analyzer troubleshooting sheet 7 of 7 5 64 TM 11 6625 3016 14 Table 5 7 Frequency Error Measurement Initial Conditions Step NO AN GRM 114 setting GEN RCVR switch to RCVR EXT V DIV switch to 1 EXT V DIV vernier to CAL AC DC switch to DC SWEEP switch to 1 mS SWEEP vernier to CAL 1 5 5 15 switch to 1 5 AM FM switch to FM FREQUENCY MHz switches to 0000000 INT MOD RCVR switch to RCVR SQUELCH control fully ccw to OFF RCVR WIDE MID NARROW switch to NARROW AUTO ZERO BATT switch to NARROW PWR OFF BATT switch 10 OFF Unplug line cord from AC outlet Table 5 8 1st and 2nd Local Oscillators Sheet 1 of 3 Reading FL 10 10 100 MHz
138. 001 ALAZLAIRA 100 MHz AIRE put FROME 1 s 2 ALL RESISTORS ARE 1 4 W 10 UNLESS OTHERWISE NOTED 100 assy 100 MHz 7018 2358 100 IMuLT 1081 t 3 ALL RESISTANCE IS EXPRESSED IN OHMS UNLESS OTHERWISE NOTED X75 MHZ MXR 4 ALL CAPACITANCE 16 EXPRESSED IN PICOFARADS UNLESS OTHERWISE NOTED I soc 1 FL5001 5 ALL INDUCTORS ARE SKG 1 8 2 UNLESS OTHERWISE NOTED AIAZIAI by 100 Mhz FILTER CO MHz FILTER PC BD 8 0 ASSY 6 ALL REF NO S CARRY AN ASSIGNED DESIGNATOR SERIES e g THIS SCHEMATIC ASSY FM 7010 2330 300 eic ou cri 5000 100 MHz FILTER ASSY L 70 8 2359 100 5 REFORE R gt CARRIES SERIES AIAZ IS DESIGNATED AP TA 7010 2330 300 J Figure 6 34 100 MHz filter A1A21 schematic diagram 6 89 6 90 blank NOTES LAST REF NO USED 2 PI 2 ALL REF NO S CARRY AN ASSIGNED DESIGNATOR SERIES a g THIS SCHEMATIC SERIES A23 THEREFORE 15 DESIGNATED 41423871 AND P5301 BECOMES A J A23P1 MECH ASSY BATTERY MODIFIED 500 p zo P530I v 12 5 Ah GND 5300 MECH ASSY BATTERY MODIFIED 7098 7624 500 _ ____ Figure 6 35 11 6625 3016 14 Battery modified A1A23 schematic diagram 6 91 6 92 blank TM11 6625 3016 14 LI Le s L4
139. 005 2338 001 fest i Replace 1010241 MECH ASSY DUTY CYCLE REGULATOR Inspect 7093 2338 202 Test Test t 01079101 PCB ASSY MOUNTING AlA8A131 Test 7010 2334 900 4 9 13 24 28 0 2 24 1 4 9 13 24 28 t 24 I n oD Repiace 0107010101 PCD ASSY DUTY CYCLE REGULATOR AlA8A1A1A1 Test P N 7510 2309 000 2 0 11 4 3 13 24 t 28 Repair 0 5 24 I M ASSY HIGH FREQUENCY PHASCLACK Inspect LIN 7010 2349 300 Test rest 9 2 Visual 1 1 3 4 21 24 3 0 1 3 4 21 24 28 39 1 0 2 24 Cid 0 1 Visual 0 8 1 2 4 14 16 24 i 1 5 1 2 4 14 16 23 23 39 0 2 24 Test 1 Replace n visual 1 3 4 14 17 24 2 09 ASSY 79 30 MHZ LOOP 10 Inspect 1 5 1 3 4 14 17 24 28 P N 7010 2342 400 Test Replace 0 1 24 8 4 01011 j hENERATOR 1412 Inspcct 0 2 Visual i du 00 Test 0 7 1 2 4 5 16 18 24 Test ics DARSA 16 18 24 Replace 0 2 24 010210 fue ASSY 1 DUAL TONE A1A 2A1 Test 1 5 152545558 P N 7010 2374 600 16 18 24 Repair 0 7 24 M Gu 102 PCR 0 2 TONE CENERATOR 141242 Test 1 5 1 2 4 5 8 P N 2013 2372 9001 16 15 24 Repair 0 5 24 M E paneer HISA FM 2314 74 PCB ASSY VCH ALAL Inspect P N 7010 2342 300 Fe
140. 1 2 Remove all power from the AN GRM 114 and disassemble the unit to gain access to the Spectrum Analyzer A1A18 module Connect the AN GRM 114 power cord to a power source and set the front panel controls as listed Control Setting MODULATION FREQ Hz 1000 0 INT MOD Midrange GEN RCVR GEN ANALY DISPR Fully to off EXT V DIV 15 KHz SWEEP 1 mS PWR OFF BATT PWR VERT and HORIZ FOCUS and INTENSITY AM FM SWEEP vernier 3 4 5 122 Center signal on CRT Clean and sharp display on CRT FM Fully cw to CAL Set HORIZ control so that the first cycle is aligned with the first major division on the left of the CRT Verify that 9 cycles appear on the CRT If 9 cycles are not displayed adjust A1A18A4R40 for the correct display lo 11 12 Set HORIZ control so that the fifth cycle is on the center graticule of the CRT Verify that each cycle is aligned with the major divisions 1 minor division of the CRT graticule If all cycles are not aligned adjust A1A18A4R47 for the correct alignment Set the EXT V DIV switch to 1 5 KHz Set the INT MOD control for 1 major division and verify that the displayed signal remains synchronized If the signal is not synchronized adjust A1A18A4R40 to synchronize the signal Observe the amplitude of the display ed signal and set the EXT V DIV vernier control fully ccw Verify that the signal displayed de creases to approximately 1
141. 114 They are located in back of the manual 6 1 6 2 blank DA Pam 310 4 TB 43 180 TB 385 4 TM 11 6625 400 12 TM 11 6625 446 15 11 6625 1576 15 11 6625 2736 14 11 6625 2953 14 TM 38 750 TM 740 90 750 244 2 11 6625 3016 14 APPENDIX REFERENCES Index of Technical Publications Calibration Requirements for the Maintenance of Army Materiel Safety Precautions for Maintenance of Electrical Electronic Equip ment Operator s and Organizational Maintenance Manual for Meter Modulation ME 57 U Operator s Organizational Direct Support General Support and Depot Maintenance Manual Wattmeter AN URM 120 Organizational Direct Support General Support and Depot Maintenance Manual for Distortion Analyzer Hewlett Packard Models 333A and 334A Operator s Organizational Direct Support and General Support Maintenance Manual Oscilloscope OS 262 P U NSN 6625 01 007 9416 Operator s Organizational Direct Support and General Support Maintenance Manual Multimeter AN USM 451 NSN 6625 01 060 6804 The Army Maintenance Management System 5 Administrative Storage of Equipment Procedures for Destruction of Electronics Materiel to Prevent Enemy Use Electronics Command A 1 A 2 blank TM 11 6625 3016 14 APPENDIX B COMPONENTS OF END ITEM LIST Section 1 INTRODUCTION B 1 SCOPE The integral components of and basic issue items for the AN GR
142. 14 REFER TO DIS ASSEMBLY ASSEM BLY INSTRUC TIONS TO REMOVE A1A18 ASSEMBLY REMOVE SPEC TRUM ANALYZER ASSY AND IN STALL A GOOD ONE SH 1 Figure 5 6 Oscilloscope and spectrum analyzer troubleshooting sheet 2 of 7 5 59 TM 11 6625 3016 14 5 sex v VERIFY SIGNAL CRT 1 4 MAJOR DIV iN HEIGHT 2 MINOR DIV AS SPECIFIED ABOVE SET EXT V DIV SWITCH TO 1 INCREASE OUTPUT OF FUNCTION GENERATOR TO 40 V p p VERIFY SIGNAL ON CRT 15 4 OR DIV IN HEIGHT 2 MINOR DIV N P AS SPECIFIED ABOVE Sy lt N YES Figure 5 6 Oscilloscope and spectrum analyzer troubleshooting sheet 3 of 7 NO NO INCREASE OUTPUT OF FUNCTION GEN ERATOR TO 4 V p p SH 2 VERIFY SIGNAL ON 18 4 MAJ OR DIV IN HEIGHT 2 MINOR DIV AS M No SPECIFIED ABOVE Y REDUCE OUTPUT OF FUNCTION GEN ERATOR TOO V 5 SH 2 ADJUST HORIZ CONTROL TO CEN TER THE DISPLAY ON CRT connect DIGI TAL VOLTMETER TO INT MOD OUT JACK VERIFY DISPLAY 1510 MAJOR DIV IN WIDTH ON CRT ABOVE REDUCE OUTPUT OF FUNCTION GENERATOR TO 0 V DISCONNECT DIGITAL VOLT METER SET EXT V DIV SWITCH TO 15 KHz SET SWEEP SET GEN RCVR SWITCH TO OFF SWITCH TO RCVR ADJUST OUTPUT OF FUNCTION GEN ERATOR TO 1 94 V rms AS I
143. 1A13 BOARD 12 0 TO 12 5 V DC YES CHECK FOR 11 V DC AT PIN 15 OF A1A13 BOARD 10 95 TO 11 05 V DC YES CHECK 250 kHz INPUTLEVEL AT PIN1 OF A1A13 BOARD WITH OSCILLOSCOPE AM OR FM MODE AM MEASURE LEVEL OF AM AUDIO AT PIN F SH 3 NO FM MEASURE LEVEL OF AUDIO AT PIN 3 OF A1A13 BOARD SH 3 Figure 5 4 Audio frequency monitor troubleshooting sheet 2 of 4 5 38 NO YES SET VOL CON TROL TO 10 O CLOCK POSITION MEASURE LEVEL OF AM AUDIO AT PIN 13 OF A1A13 BOARD NLT NO 40 mV p p YES REFER TO MOTHER BOARD AND FRONT PANEL SCHEMATICS TRACE AUDIO FROM PIN 13OF A1A13 BOARD TO THE SPEAKER TO ISOLATE PROBLEM SH4 ADJUST A1A13 R115 TO GET 110 mV p p IF CAN T ADJUST TO GET 110 mV p p A1A13 250 kHz I F BOARD 1S BAD SET BATT SWITCH TO OFF REMOVE A1A13 CIRCUIT BOARD FROM EXTENDER BOARD REMOVE EXTENDER BOARD INSTALL A GOOD A1A13 BOARD INTO MOTHER BOARD CONNEC TOR SET PWB QEF BATT SWITCH TO OFF SH 4 NO YES SET VOL CON TROL TO 10 O CLOCK POSITION MEASURE LEVEL OF FM AUDIO AT PIN 13 OF A1A13 BOARD NO YES REFER TO MOTHER BOARD AND FRONT PANEL SCHEMATICS TRACE AUDIO FROM PIN 13 OF A1A13 BOARD TO THE SPEAKER TO ISOLATE PROBLEM SH 4 TM 11 6625 3016 14 SH 4 Figure 5 4 Audio frequency monitor troubles
144. 200 kHz ooh AIA2 7d 1 27 AIAIS 15 1 28 AAZ6Pa 7 kHz niv 29 I H Vv 3I ATlAG6FLI I AIAZFL v AIA FLI 9 v 5 SOURCE i 35 10 22 AIAFLS v 22 1 It Poko UM 1 MAZFLIO I O O 45 18 ev 1 5 SOURCE 4 5 BOURCE 8 AIAIQU2 20 1 O 5V I AIARFLH a KT TN AIAZFLIS 2 v Tae GEN AA IR GEN 2 kisis Ji 12 rt 45v 1 Figure 6 1 AN GRM 114 motherboard A1A2 schematic diagram sheet 2 of 2 6 5 6 6 blank EXT MOD IN EXT SPKR EXT ACC a FRONT PANEL ASSY 7005 2377 300 SEE SCHEMATIC 0000 582 300 amis SPECTRA ANALYZER UPPER FLOOR SEE INTERCONNECT Ross 400 0000 236 600 INTERCONNECT 1026 2521 700 to SEE SCHEMATIC 0000 2306 200 t EN MERCEDIS AP SDI E et 0 7005 2377 700 P 0 7005 2377 700 P O 7005 2377 700 QUAL TONE GENERATOR 7065 2375 300 SEE SCHEMATK 0000 2374 300 7005 2377 709 PrO 7005 2377 700 FREQ SELECT Sw PC BD ASSY 13 2343 300 SEE SCHEMATIC 0000 2374 300 1
145. 25 3016 14 PART 15 Hv 1200 MHz DIODE Ew 35V0C 27 REC GEN Figure 6 22 Regulator and power supply A1A14 schematic diagram 6 59 6 60 blank TM11 6625 3016 14 nkn ryncd Cas pnuG mi Le 22 4 cr TP HARMONIC GENERATOR E DRAFTSMAN NOTES T ON SAT 9 3301 BECOMES 1 NOTES 4340 1 1 LAST REF NO USED 3402 mr T AIAUSAICIS 684 Lava ve eer AIALSAIFL2 Iz VE AMISAILE n 414154192 x j MOLTI IRR 56 l uu DNE 22 prd T 1078 0001 1080 0000 i 8 35 2 ALL RESISTORS ARE 1 84 10 UNLESS OTHERWISE NOTED paper 3 ALL RESISTANCE IS EXPRESSED IN CHNG MECH ASSY MJLTPLER UNLESC OTHERWISE NOTED 1080 4 ALL CAPACITANCE 16 EXPRESSED 1 7048 308 600 UNLESS OTHERWISE NOTED 5 ALI REF NOS CARRY AN ASSIGNED DESKINATOR SERIES 60 THIS SCHEMATIC CARRIES 5 18 DESIGNATED AIALBAIR I 3300 PCB ASSY 1080 MHz MULTI ZAMP 7010 235 1 300 PES IS Lei u Vae sip EM ied e Sa L T T Pease ae See 4 3400
146. 276 amp ON DETAIL b 1 1 D SSS SS W ee eee 1 1 D OUTPUT LEVEL ADJ lk T BV LA NOTE 4 Figure 6 16 TM11 6625 3016 14 PART OF 39v DC REG OUT i2V 0 NEG OUT DC REG OUT 8 REG QUT S DC REG OUT 2 TO BATTERY CHARGER Duty cycle regulator A1A8A1 schematic diagram 6 39 6 40 blank NOTES DRAFTSMAN NOTES LAST REF NO USED AIASC2O AIABCRE AIA9839 AIASKIE ALL RESISTORS ARE 8 W 10 UNLESS OTHERWISE NOTED ALL RESISTANCE I EXPRESSED IN OHMS UNLESS OTHERWISE NOTED ALL GAPACITANGE 19 EXPRESSED IN PICOFARADS UNLESS OTHERWISE NOTED 5 ALL REF NO S CARRY AN ASSIGNED DESIGNATOR SERIES 624 THIS SCHEMATIC CARRIES SERIES 4149 THEREFORE RI 18 DESIGKATED AIABRD QN SHT 122401 BECOMES ASI J2402 2608 P2404 Lock 1700703492100 TM11 6625 3016 14 Saye ec 2 E EI 4 Bh EI D gt La 2 Bun gt 4440 30 150 Maz 1240 INPUT FROM 10 CLOCK 10 1 v DE 18OURCET 42403 E eu 7415190 Ben COUNTER PO 2404 LOC
147. 2A1A1R102 FOR 30 AM MODULA TION ON MM 100 METER REFER TO DISASS us sl 4 SH 8 MM 100 multimeter troubleshooting sheet 9 of 10 SET AN GRAL 114 PWR QEE SWITCH TO QEE a UNPLUG MM 100 PENUANT CABLE FROM AN GR 113 EXT AL 2 5 ss REFER 100 SCHEMATIC USE OHMMETER TO CHECK CONTINUI TY OF PENDANT CABLE SET 100 RANGE SWITCH TO 10 VOLTS CABLE FROM INI MOD JACK TO 100 INPUT JACK RECORD 100 METER READING TURN 1 2 INT MOD TROL FULLY ccw TO SET MODULATION EREQ SWITCHES TO 1100 0 Hz Figure 5 12 SET MM 100 RANGE SWITCH TO 1VOLT ADJ INT MOD CONTROL FOR A READING OF 10 OF THE LEVEL YOU RECORDED SET MM 100 RANGE SWITCH 0 30 DIST L TURN 1 INI CONTROI FULLY cw REFER TO DISASS EMBLY ASSEMBLY INSTRUCTIONS TO OPEN MM 100 ADJUST A2A1A1R62 FOR A READING OF 10 DIST REFER TO 015 88 EMBLY ASSEMBLY INSTRUCTIONS TO CLOSE UP MM 190 SET AN GRM 114 PWR OFF BATT SWITCH TO OFF THIS CONCLUDES MM 100 MULITMETER TROUBLESHCO INC TM 11 6625 3016 14 SH 3 MM 100 multimeter troubleshooting sheet 10 of 10 5 111 TM 11 6625 3016 14 5 7 AN GRM 114 Alignment and Adjustment a General The AN GRM 114 contains numerous
148. 3 2 Receive block diagram 3 3 TM 11 6625 3016 14 rent to protect the 1st Mixer figure 6 32 The Power Monitor Relays figure 6 25 are de energiz ed The 1st Mixer RelBys figure 6 32 are de energized and the 1st local oscillator signal refer to figure 3 5 for a block diagram is present at 1200 MHz above the first three digits of the FRE QUENCY MHz thumbwheels A 1200 MHz inter mediate frequency is applied to the 1200 MHz Diode Switch figure 6 24 where it is filtered It is then applied to the 1200 MHz Amplifier and the amplified signal is applied to the 1200 MHz Diode Switch where it is filtered once more The 1200 MHz signal is applied to the 2nd Mixer where the 2nd local oscillator signal refer to figure 3 6 a block diagram is present at 1079 0001 1080 000 MHz depending on the last four digits of the FREQUENCY MHz thumb wheels The 2nd Mixer beats the two signals to gether and the difference signal of 120 MHz is fed through the Receive Diode Switch to the Spectrum Analyzer for display and to the 120 MHz Receiver figure 6 37 Within the 120 MHz Receiver the 120 MHz signal beats with a signal from a 109 3 MHz oscillator The difference signal of 10 7 MHZ beats with a signal from a 10 95 MHz oscillator and the 250 kHz difference signal is applied to the 250 kHz I F Monitor Audio Cir cuit Board figure 6 21 The signal splits for AM and FM demodulation AM audio and signal level are detected The detec
149. 3 ms void will be produced by ref erence pulse every 1 5 seconds in generate or receive modes If this con ditions hinders testing of unit under test UUT place switch to OFF posi tion In OFF position FREQ ER ROR meter is not calibrated and should not be used for frequency error measurements 50 rf input output connector for UUT Lights when power is applied 3 position switch which supplies interrupts power as follows PWR leftmost position Allows application of exter nal ac or dc power Off center position Shuts off power to all cir cuits except battery charger circuit BATT rightmost position Powers AN GRM 114 by its internal battery set will turn off automatically after approximately eight minutes of operation to prevent battery rundown TM 11 6625 3016 14 Table 4 1 AN GRM 114 Controls Indicators and Connectors Continued Control indicator or connector Function PWR OFF BATT switch Continued NOTE AN GRM 114 internal battery is charging whenever test set is con nected to an ac power source in cluding times when power switch is OFF RCVR WIDE MID NARROW switch Selects WIDE MID or NARROW bandwidth of AN GRM 114 receiver GEN RCVR switch Controls operating mode of AN GRM 114 as a signal generator or receiver as follows GEN position AN GRM 114 functions as a signal generator producing rf output at TRANS RCVR connec tor If rf energy is ap plied to
150. 4 TU Q A 2 1 H AI 9 N ISI O1 N alse C IN IN P c co CO 6 o z 5 IN S AB O O1 C1 00 CO LIST OF TABLES Continued Title Frequency error measurement operating instructions Multimeter operating instructions Tools and test equipment Glossary of abbreviations AN GRM 114 performance test initial conditions AN GRM 114 performance test initial conditions Receiver troubleshooting initial conditions 151 and 2nd local oscillators Frequency error measurement initial conditions 151 and 2nd local oscillates RF signal generator troubleshooting initial conditions AN GRM 114 assemblies and interactive assemblies VCO tuner adjustment Tune pulse frequency and amplitude tests Disassembly sequence TM 11 6625 3016 14 U Q gt eem O MIX ES N o1 lo vii TM 11 6625 3016 14 CASE CLOSED CASE OPEN Test Set Radio AN GRM 114 Figure 1 1 TM 11 6625 3016 14 CHAPTER INTRODUCTION Section 1 GENERAL 1 1 Scope
151. 46 2 Swing Lower Floor 52 open figure 5 46 3 Tag and disconnect coax cables from FM AM Generator 54 figure 5 46 4 Unplug mating connector from brack et mounted connector 141 figure 5 46 b Remove two 1 4 Phillips screws two lockwashers and two flatwashers from FM AM Generator 54 5 46 10 11 13 14 h 1 Remove assembly 54 from Lower Floor 52 figure 5 46 Remove two 1 4 Phillips screws two lockwashers and two flat washers which hold 100 MHz Amplifier 108 MHz Mixer Assembly 55 to Lower Floor 52 figure 5 46 Tag and disconnect coax cables from assembly 55 5 46 Tag and unsolder wire from feed thru capacitor Remove assembly 55 from Lower Floor 52 figure 5 46 Tag and disconnect coax cables from 120 MHz Receiver Assembly 56 Tag and unsolder wires from feed thru capacitors on assembly 56 Remove two 1 4 Phillips screws four lockwashers and two flat washers which hold assembly 56 to Lower Floor 52 figure 5 46 Remove assembly 56 from Lower Floor 52 5 46 Removal of Assemblies from Rear Panel Loosen two captive screws which se cure A1A8A1P1 to A1A8A1J1 140 on Duty Cycle Regulator Assembly 59 figure 5 46 Remove four Phillips screws which hold Duty Cycle Regulator 59 to Rear Panel 58 fiqure 5 46 Remove Phillips screw and terminal lug at inside bottom of Regul
152. 48 200 16 24 28 42 Repair 0 5 24 0102303 MECH ASSY FM AM GENERATOR AlA24A3 Inspect 0 2 Visual P N 7005 2376 200 Test 0 7 3 4 7 14 16 24 Test 1 0 1 3 6 7 8 14 16 24 42 Replace 0 3 24 010230301 PCB ASSY FM AM GENERATOR 1 24 Test 1 0 1 3 4 6 7 8 P N 7010 2376 100 14 16 24 42 Repair 055 24 M L D 6 SA 79 ORSEL MA Form 6031 1 Jul 76 HISA FM 2314 7 0 GROUP NUMBER SECTION Il MAINTENANCE ALLOCATION CHART TEST SET RADIO AN GRM 114 2 COMPONENT ASSEMBLY 01025 0102501 01026 01027 0102701 0102702 02 0201 020101 02010101 020102 01024 PCB ASSY RELAY DRIVER A1A25 P N 7010 2373 100 MECH ASSY HIGH FREQUENCY MULTI MIXER A1A26 P N 7015 2309 700 PCB ASSY HIGH FREQUENCY MULTI MIXER A1A26A1 P N 7010 2310 100 MECH ASSY FREQUENCY SELECT SWITCH A1A27 P N 7013 2343 300 MECH ASSY HIGH LEVEL AMPLIFIER 1 28 P N 7005 2372 500 PCB ASSY NO 2 HIGH LEVEL AMPLIFIER A1A2BA P N 7010 2372 400 PCB ASSY NO 2 HIGH LEVEL AMPLIFIER A1A28A2 P N 7010 2372 100 CASE ASSEMBLY MM 100 A2 P N 7019 2372 100 COMPOSITE ASSY MM 100 A2A1 P N 7003 2380 000 PCB ASSY 100 2 1 1 P N 7010 2380 300 CABLE ASSY INTERCONNECT MM 100 A2A1A1A1 P N 6046 2379 900 MECH ASSY FRONT PANEL MM 100 2 1 2 P N 7005 2380 400 3 MAINTENANCE FUNCTION Inspect Test Test Replace Inspect Test Test Replace Test
153. 5 FO INPUT FROM ILLE A 6000 BD ASSY DIVIDER I S 5900 MECH ASSY FM AM GENERATOR 7008 2378 200 Figure 6 38 generator A1A24A3 schematic diagram 6 99 6 100 blank DRAFTSMAN S NOTE NOTES 4610 BECOMES A1425JI 1 LAST REF USED 1 25 J Qa 5 2 ALL RESISTORS ARE 1 BW 10 3 ALL RESISTANCE EXPRESSED IN OHMS UNLESS OTHERWISE NOTED 4 TEST VOLTAGE VALUE LEGEND GEN REC HI LEVEL 5 ALL REF NO S CARRY AN ASSIGNED DESIGNATOR SERIES e g THIS SCHEMATIC CARRIES SERIES At A255 THEREFORE RI 15 DESIGNATED 1 42581 gt do 1 1 25 ASSY RELAY DRIVER 7010 2375 100 11 LEVEL PWR AMP RECEIVE GND GND HIGH LEVEL RF AMP RELAY FIRST MIXER REG BD POWER MONITOR 2 410 7 VOC 11 4 2 VOC 11 6625 3016 14 10 2 VOC 5195 143146 CR4 IN4I48 BD ASSY RELAY ORIVER 7010 2373 100 Figure 6 39 Relay driver A1A25 schematic diagram 6 101 6 102 blank DRAFTSMAN NOTES ONSHT BECOMES 1 LAST REF NO USED uae 118205 FLO 5204 iti Tuo 53 L 706 230
154. 5 Nod ASH 2 13 78 80 g LOCK LT bolo 1 ki BATT ON RELAY 30 BATT ON RELAY 7008 2347 000 79 ey I Fanes 12 Hi LVL 36 ee 5 l 4MH toto 10 BISH 2 100 L 1005 2972 2m J ved 2 D li 2 MHz Paars RECEIVE AIAIA JIM 1 IMHE 9 12 w PT aan 1 T augrL29 ano BLOCK iB poro 13 AlA2BFL3 T GHD S HILEVEL SP 30 5v 11 8 1 Tanar Tp 7 9 7006 2372 800 cd 6 8 Tue L OND 14 5v I t i i CR MOTHER BOARD x Rc T T SAE Figure 6 1 AN GRM 114 motherboard A1A2 schematic diagram sheet 1 of 2 6 3 6 4 blank TM11 6625 3016 14 ____ 2 2 4 P O FRONT PANEL REF 79 80 LOOP avert B SH 1 AMAA JE AIAN I 14 12 24 42 v SOURCE 25 12 v SOURCE 26 109 8 LOCK LT ev TAAZFLIS 9 21 ala2ce Leo 34 lAlA2FLSS 5 12 v SOURCE izv 1 400 2i 4414 I 15 00 kHz V 22 2 t AlA2 732 100 2y 4 I REF FREQ SEL 8 MARFL4
155. 5 SQUELCH CONTL 1458 AGC INV RIOS 4700 lt SQUELCH LIGHT LE AUDIO GNO 250 kHz IF MON AUDIO BD 557 __________ MEUM T7 O Figure 6 21 250 kHz if monitor audio A1A13 Schematic diagram sheet 3 of 3 6 57 6 58 blank NOTES DRAFTSMAN NOTES 1 LAST REF NO USED ON SHT P320 BECOMES AIAIMPI AIAIACS CR RES x ca 2 ALL RESISTORS ARE W 1096 UNLESS OTHERWISE NOTED reg pw SUPPLY P G assy 3 ALL RESISTANCE L xPRESSED IN OHMS UNLESS OTHERWISE _ NOTEI 4 ALL CAPACITORS ARE TANTALUM 5 RILIS SET AT TEST NOWNAL E 1 RANGE 4 7 M i2 M F 5 6 AIAZQI amp AIAZO ARE LOCATED ON MOTHER BD 1 ASSY 7005 2 363 701 AND ARE SHOWN HERE FOR REF ONLT 7 ALL REF NOS CARRY AN ASSIGNED DESIGNATOR SERIES T Cou THIS SCHEMATIC CARRIES SERIES 41414 THEREFORE RI i DESIGNATED AIAISAID T F 770 Pazor 120 3k BATT THER a gt RELAY 5 gt lt 5 BATTERY On gt 04 Re ar W E RATT METER ADJ cw rest gt BATT TIMER pu E gt T gt E AT RAGS 147 Ta 4 1894198 xj 3200 RES POWER SUPPLY BD L 70 0 2367 20 M11 66
156. 5 and two 1 washers 156 which secure frame support member 53 to Front Panel 44 and Rear Panel 58 figure 5 46 Upper Floor Reassembly Attach two 1 4 Philllps screws 24 two lockwashers 25 and two flat washers 26 which secure Clock Divi ddr mechanical assembly 22 to Upper Floor 6 figure 5 48 Install tagged coax cables Install mating connector to connector 23 figure 5 48 Attach two 1 4 Phillips screws 19 and two lockwashers 20 which se cure Master Oscillator Output Distri bution Amplifier 21 to Upper Floor 6 figure 5 48 Install tagged coax cables and solder wire to feed through at Master Oscilla tor Output Distribution Amplifier 21 figure 5 48 install TCXO Master Oscillator 13 to mounting bracket 15 5 48 Attach two hex nuts 16 one lock washer 17 and one ground lug 18 which secure Master Oscillator mount ing bracket 15 to TCXO Master Os cillator 13 figure 5 48 Attach two 5 16 Phillips screws which secure Master oscillator mount ing bracket 15 to the Upper Floor 6 figure 5 48 Install tagged coax cable to TCXO Master Oscillator 13 Plug in tube Socket 14 to TCXO Master Oscilla tor 13 figure 5 48 Install 1200 2200 MHz Oscillator me chanical assembly 11 to Upper Floor 6 figure 5 48 10 11 12 13 14 15 16 17 18 19 TM 11 6625 3016 14 Attach four P
157. 66 900 Figure 6 31 Spectrum analyzer front plate assembly A1A18A5 schematic diagram 6 83 6 84 blank DRAFTSMAN NOTES ON SHT 44801 BECOMES AIAISJI NOTES LAST REF NO USED AIAISFLI Mx RI 2 ALL NO S CARRY AN ASSIGNED DESIGNATOR SERIES 6 9 THIS SCHEMATIC CARRIES SERIES AIAIS THEREFORE RI DESIGNATED AIAI9RD AIAIS FIRST MIXER MECH ASSY 7005 2373 300 J J4802 34803 54804 44895 44806 AIAISJE AIAISJ3 AIAIS 18 AIAIS JS AIAISJ6 AIAISFLI ASSY FIRST MIXER Figure 6 32 11 6625 3016 14 44804 1200 MHz IF J4803 1200 2200 MHz OSC J4805 HIGH LEVEL AMP J4802 60 dB PAD 44801 PWR MONITOR RELAY J4806 HIGH LEVEL AMP H 480 T v 3 First mixer A1A19 schematic diagram 6 85 6 86 blank NOTES 1 LAST REF NO USED 1 2 4 FLS Gi 19 MXI RIS 3 ALL RESISTORS ARE 4W 10 UNLESS OTHERWISE NOTED 3 ALL RESISTANCE IS EXPRESSED IN OHMS UNLESS OTHERWISE NOTED 4 ALL CAPACITANCE IS EXPRESSED PICOFARADS UNLESS OTHERWISE NOTED 5 ALL REF NO S CARRY AN ASSIGNED DESIGNATOR SERIES e g THIS SCHEMATIC CARRIES SERIES 1 2 THEREFORE R tS DESIGNATED AZORT2 DRAFTSMAN NOTES J4901 BECOMES AIA20JI 44902 34903 44904 44905 44906 44907 14908 FL490 FLA4902 FL4903 FL4954 2 4905 A I A20J2 AIA2OJ3 2044 AJA20J5
158. 6625 3016 14 n p DEM RD 12 ACSH 13 TO i R55 V2LF3S3 2 22 47 35 v i gt cnn ul 50 I CLM 0 2 2 R40 R56 RST RSS LOG AMP 150 K 5600 5600 5600 CREA t 19 R39 R36 4 Ik IOO k V CREB RECTIFIER Pints L SH 32 Pi 1 R72 gt 3480 3480 MUR 178W 1 1 8W 19 1 8w 1 s 44H 3 316 sow 1 G TO10 2380 300 BD ASSY MM 100 710077200 Figure 6 43 MM 100 assembly A2A1 schematic diagram sheet 2 of 3 6 111 6 112 blank XIOA 22353 TM11 6625 3016 14 TO SW730 A M 8 2 212 SIG GND sis ND TO C43 Law a DEMOD DEMOD Te PIN 4 2 AUDIO AMP RTN2 3010 1 x M SH 2 2 TO SW 302A Une cae 8 sW73028 2 J SH JD VOLUME 2 7 AUDIO DRIVER cao 150 16 GND FROM El C43 35v T2 5 Riot 99 9 k IOW 1 ca F DEMOD FROM E2 6v 359 995 P70 7010 2380 300 PC BD ASSY MM 100 7100 7200 lt lt 97314 30 h
159. 9 700 4 amp 2 ALL RESISTORS ARE 1 4 W 109 UNLESS OTHERWISE NOTED 3 ALL RESISTANCE EXPRESSED IN OHMS UNLESS OTHERWISE NOTED 4 ALL CAPACITANCE 8 EXPRESSED IN PICOFARADS UNLESS OTHERWISE NOTED WHEN NECESSARY 6 ALL REF NO S CARRY AN ASSIGNED DESIGNATOR SERES ej THIS SCHEMATIC CARRIES SERIES AA26 4 AIAZGAI THEREFORE Ri 19 DESIQNATEO AIAZ Cas 1 H FREQ MULTI MIER ANP BD assy 0 230 00 ee Sree 1 2644 AA26A81 0 09 206 595 400 559 600 799 800 999 GND HI FREQ MULTI MIXER ASSY 195 39 6204 99 Jaza 1200 2200 Hi FREQ MULTI MXR BD ASSY 17007230700 _ Mhz FILTER CAVITY FILTER CAVITY MA47047 cas MA47047 CRI MA47047 Figure 6 40 TM11 6625 3016 14 46205 100 300 WHr High frequency multiplier mixer A1A26 schematic diagram 6 103 6 104 blank NOTES 1 LAST REF NO USED 1 27 2 Sw 2 ALL RESISTORS ARE 174 W 10 3 ALL CARRY ABBIGNED SERIES 4 9 THIS SCHEMATIC CARRIES SERIES THEREFORE RI IS DESIGNATED A A27RI J DRAFTSMAN NOTES ON SHT J6401 BECOMES 26402 27 1 assy SELECT sw L 7013 2343 300 4 11 6625 3016 14
160. 97 and remove knob 97 from control shaft figure 5 47 Tag and unsolder wires from SQUELCH control at rear of Front Panel 44 figure 5 47 Remove hex nut and flat washer which secure control to Front Panel 44 figure 5 47 Remove SQUELCH control and termi nal lug from Front Panel Tag and unsolder wires from EXT SPKR jack 98 at rear of Front Panel 44 figure 5 47 Remove hex nut and flat washer which secure EXT SPKR jack 98 to Front Panel 44 figure 5 47 Remove jack and lockwasher from Front Panel Use an Allen wrench to loosen two socket head screws which hold VOL control knob 99 to VOL control shaft Remove knob 99 5 47 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 Tag and unsolder wires from VOL control at rear of Front Panel 44 figure 5 47 Remove hex nut and flat washer which secure VOL control to Front Panel 44 figure 5 47 Remove VOL control and lockwasher from Front Panel Tag and unsolder wires from INT MOD RCVR switch 100 at rear of Front Panel 44 figure 5 47 Remove hex nut and flat washer which secure INT MOD RCVR switch 100 to Front Panel 44 figure 5 47 Remove switch and lockwasher from Front Panel Tag and unsolder wires from AM FM switch 101 at rear of Front Panel 44 figure 5 47 Remove hex nut and flat washer which secure AM FM switch 101 to Front Pane
161. A27 schematic diagram High level amplifier A1A28 schematic diagram MM 100 assembly A2A1 schematic diagram 3 sheets LIST OF TABLES Title Physical characteristics Electrical characteristics Environmental characteristics Items supplied AN GRM 114 controls indicators and connectors AN GRM 114 operating instructions RF signal generator initial adjustments and control settings RF signal generator operating instructions RF signal generator operating instructions for AM RF signals RF signal generator operating instructions for FM RF signals Oscilloscope initial adjustments and control settings Oscilloscope operating procedures Initial adjustments and control settings Receiver operating instructions Initial adjustments and control settings Spectrum analyzer operating instructions Spectrum analyzer operating instructions for spurious signal detection Audio generator initial adjustment and control settings Audio generation with MM 100 operating instructions Audio generation with oscilloscope operating instructions Power monitor operating instructions for measuring transmitter carrier power Master oscillator calibration using received time standard signal Master oscillator calibration using an external frequency standard Initial adjustments and control settings Page 28 Oo Co l ells 411 4 O1 CO Go o lo ol lollo 1
162. ABLE LEVEL OF AUDIO TONE CLEAR AUDIO TONE HEARD SET SIG GEN TO FM 5 KHz DEVN SET OUTPUT LEV EL TO 40 dBm ABOUT 2200 CHANGE AN GRM 114 CONTROL SETTINGS AS FOLLOWS SET AM FM SWITCH TO EM SET DEV PWH SWITCH EXT V DIV SWITCH TO 6 KHz SET VOL CON TROL FOR A COM FORTABLE LEVEL OF AUDIO TONE NO SET PWR OFE BATT SWITCH TO OFF UNPLUG LINE CORD FROM AC OUTLET REFER 015 ASSEMBLY ASSEMBLY IN STRUCTIONS TO REMOVE CASE CAREFULLY RE MOVE AN GRM 114 CASE UNPLUG A1413 250 KHz IF BOARD FROM MOTHER BOARD CONNEC TOR PLUG EXTENDER BOARD INTO MOTHER BOARD CONNECTOR PLUC 250 KHz IF BOARD INTO EXTENDER BOARD PLUG LINE CORD INTO AC OUTLET SET PWR OFF SWITCH PWR SH 2 TM 11 6625 3016 14 SPEAKER AP PEARS TO BE FUNCTIONING PROPERLY GO TO SCOPE amp FREQ ERROR FLOWCHARTS RE TURN TO THIS POINT IF YOU USED EX TENDER BOARD MAKE SURE IT HAS BEEN ED FROM UNIT ALSO MAKE SURE A1A13 BOARD WAS RE INSTALL ED INTO MOTHER BOARD CONNEC TOR REFER TO DIS ASSEMBLY ASSEM BLY INSTRUC TIONS TO REPLACE CASE IF REMOVED Figure 5 34 Audio frequency monitor troubleshooting sheet 1 of 4 5 37 TM 11 6625 3016 14 CHECK FOR 12 V DC AT PIN 2 OF A1A13 BOARD YES CHECK FOR 12 V DC AT PIN 14 OF A
163. ARROW 43 5 e mur 120 RECEIVER ASSY r ue m 5700 7010 2348 200 4 li 120 assy 7027 2348 300 Figure 6 37 120 MHz receiver A1A242 Schematic diagram sheet 2 of 2 6 97 6 98 blank ORAFTSMAN ON SHT 4590 BECOMES A A24A2J1 45902 24 3 2 NOTES 5903 24 Adres MECH ASSY FM AM GENERATOR 2376 200 i La SU EP P C BD ABSY FM Ei 7010 2376 100 d 1 LAST REF NO USED 35904 AIA24A3J4 AIABGASEL 1 24 1244 E ul 99 R37 xB Y 2 ALL RESISTORS ARE 1 49 10 UNLESS OTHERWISE NOTED ALL RESISTANCE EXPRESSED IN OHMS UNLESS OTHERWISE NOTED 4 ALL CAPACITANCE EXPRESSED IN PICOFARADS UNLESS OTHERWISE NOTED 5 ALL REF NOS CARRY AN ASSIGNED DESIGNATOR SERES THIS SCHEMATE CARRIES SERES AIA2 4438 AJ AZAASA THEREFORE RI 5 DESIGNATED 142448 RI X PART OF 45804 GEN PART OF 35904 5 FM AUDIO TOME BKELB 3 40673 240875 5 530 TM11 6625 3016 14 gt PHASE DETEOTOR ces 100 15801 576m EL ATTEN 5n AM DETECTOR LEVELER LMTA CH C 4 6 v D R 2 3390
164. AT A1A3A2J1 WITH SA 1311 MHz 15 dBm TO 13 Q AT A2J1 YES 1ST LOCAL OSCIL LATOR APPEARS TO BE WORKING PROPERLY THIS FREQUENCY MONITOR TEST POINT OF HIGH FREQ MULT MIXER WITH SA REFER TO TABLE 58 PROBLEM INDICAT ED WITH 1200 2200 MHz OSCILLATOR TURN POWER OFF REPLACE A1A3A2 TURN POWER ON 34 EXERCISE EREQ MHz SWITCHES ON FRONT PANEL AND OBSERVE SPEC TF UM ANALYZER DISPLAY IS SA DISPLAY OF T P PROPER NO YES MEASURE VOLT AGE AT A1A9FL30 WITH VOLT METER IS 6 V dc TO 1V dc AT A1A9 FL30 NO YES PROBLEM INDICAT ED WITH INOICA TOR LAMP CHECK BULB WIRING REPLACE AS NECESSARY SH 14 ERE PROBLEM IS INDI CATED WITH HIGH FREQ PHASE LOCK P C BD TURN POWER OFF PLACE A1A9 5 8 RF signal generator troubleshooting sheet 13 of 19 5 84 AMPLITUD PROPER AT NO MEASURE SIGNAL AT A1A26J1 WITH SA SH 16 AT A1A26J1 NO REMOVE SCREWS SECUHING LOWER FLOOR ASSY SWING LOWER FLOOR OUT TO ALLOW ACCESS TO TEST POINTS MEASURE SIGNAL AT A1A24A1J2 WITH SA 100 MHz 4 dBm TO 8 dB AT A1A24 A1J2 NO YES PROBLEM INDICAT ED WITH 100 MHz FILTER TURN POWER OFF RE PLACE A1A21 TURN POWER ON TM 11 6625 3016 14 MEASURE VOLT AGE AT APPR
165. BOARD CIRCUIT BOARD 100 MHz 10 MHz 1 MHz DIGIT DIGIT DIGIT FROM 3 LEFTMOST DIGITS OF FREQUENCY MHz THUMBWHEELS Figure 3 5 1st local oscillator block diagram 3 9 TM 11 6625 3016 14 TO 2ND MIXER TCXO MASTER OSCILLATOR 1079 0001 1080 0000 MHz 1080 MHz MULTIPLIER AMPLIFIER TCXO MASTER OSCILLATOR OUTPUT DISTRIBUTION AMPLIFIER 107 9000 1 108 00000 MHz 108 MHz BANDPASS FILTER CLOCK DIVIDER 107 90001 108 00000 MHz 79 80 MHz LOOP CIRCUIT BOARD 100 MHz MULTIPLIER 108 MHz MIXER 100 kHz 10 kHz 1 KHz 100 Hz DIGIT DIGIT DIGIT DIGIT FROM FOUR RIGHTMOST DIGITS OF FREQUENCY MHz THUMBWHEELS Figure 3 6 2nd local oscillator block diagram 3 10 DUAL TONE GENERATOR APPLIED 5 V DC TM 11 6625 3016 14 BY INT _ 5 1 perc kupa MOD OF F BIT SON CONTROL RATE ro N y MULTIPLIERS CIRCUITRY 10 224MHz Lo i 22 XTAL OSCILLATOR ET nu pu JA FILTERING j COUNTER COUPLING ee OPERATIONAL i AMPLIFIER L FROM INT MOD OFF MOD OFF CONTROL CONTROL FROM TO 1 KH MODULATION INT MOD FREQ Hz OFF CONTROL THUMBWHEELS 77 771 FROM 1 kHz INT MOD OFF CONTROL TO AM FM SWITCH CONNECTOR THEN TO FM AM GENERATOR TO INT TO INT MOD OUT MOD RCVR CONNECTOR S
166. C BATT QUT s Raw ne swiTCHED RAW DC SWITCHED 1 500 39v 06 RELAY OUT BATT 10 RELAY AT2001 is 8 v DC DRAFTSMAN NOTES WEINSCHEL on 5 SHT 42001 BECOMES AIABJI Twouitas t eu son j 59 2002 AlA8J2 lt 7 42191 IAB AILS Fa aM E u 4 1 NOTES 1 LAST REF ND USED Miu EXT 12006 T7 mir RELAY COL 1 MECH ASSY REAR PANEL p 45301 MUAT OST DATT ON l REAR 7005 2538 00 AIABA1J1 GND G4 4188416 12 RAW DG SWITCHED CC SWITCHED 1 3 BATY CHARGER 2 ALL NO S CARRY AN ASSIGNED DESIGNATOR BATT IN ATOR ASSY SERIES a g THIS SCHEMATIC CARRIES SERIES REGLLATORASS THEREFORE RI IS 0 5 9 AIABRIX RAW DC PWR SW L 7023 2336 890 2100 1 DUTY CYOLE REGULATOR ASSY TO23 2338 400 110 47 420 2000 MECH ASSY REAR PANEL 1 L 4 I _ 42 100 J 1 aga ll L ee Se S 14 1 i 410VAC 47 4200 1 UR 4 5640 7618 2001 5840 761 8 200 220V OPERATION i LON OPERATION DETAL Figure
167. CE 2 TURN POWER ON RETURN TO 32 THEN 6 SH 2 WHEN PROBLEM IS SOLVED Figure 5 5 Receiver troubleshooting sheet 11 of 14 PROBLEM INDICAT ED WITH A G C ASSY TURN POW ER OFF REPLACE A1A3A3 TURN POWER ON RETURN 31 6 SH 2 WHEN PROBLEM ISSOLVED RETURN A G C TO CIRCUIT CONNECT A1A3A3P1 TO A1A3 A3J1 AND A1A3A2P1 THROUGHOUT ftANGE RETURN TO 6 SH 2 WHEN COMPLETE MEASURE SIGNAL AT A1A20J5 WITH SA FL 3 dBm 10 dBm A1A20J5 NO YES 2ND LOCAL OSCIL LATOR APPEARS TO BE WORKING PROPERLY AT THIS FREQUENCY MEASURE SIGNAL AT A1A5J1 WITH SA NO YES MEASURE SIGNAL A1A5J2 WITH SA Figure 5 5 Receiver troubleshooting sheet 12 of 14 PROBLEM INDICAT ED WITH 108 MHz BANDPASS FILTER TURN POWER OFF REPLACE A1A5 POWER ON TM 11 6625 3016 14 PROBLEM IS INDI CATED WITH 1080 MHz AMPL TURN POWER OFF RE PLACE 1 15 TURN POWER ON o 5 55 TM 11 6625 3016 14 J SIGNAL MEASURE SIGNAL AT A1A10J1 WITH 2 21 OSCILLOSCOPE WITH VOLT METER L MEASURE SIGNAL i AT ATATOJ WITH OSCILLOSCOPE 1 At 00 MH YES 0 V dc TO 2 V dc AT 5 TO 7 Vp p A1A10P2 21 10 Ji NO YES PROBLEM INDICAT ED WITH 100 MHz 108 MHz MIXER
168. CH TO VOLT DISCONNECT BATTERY LOAD BOX FROM TERY CABLE YES METER READS 138 145 V dc RECONNECT BAT TERY AND PUT BACK INTO AN GRM 114 R LEASE AUTO ZERO BATT SWITCH SET LOAD ADJ CONTROL FOR A READING OF 13 V ON METER PRESS PWR OFF BATT SWITCH TO BATT UNIT 15 NOW OFF PRESS PWR QFF BATT SWITCH TO ATT 3 DISCONNECT AC POWER CORD FROM REAR CONNECTOR SET BATTERY LOAD BOX VOLT AMP SWITCH TO AMP SET PWR QFF BATT SWITCH TO OFF CONNECT EXTER NAL DC POWER CABLE TO REAR CONNEC TOR METER READS 9 TO 15A HOLD DOWN AUTO ZERQ BATT SWITCH TURN OFF DC POWER SUPPLY CONNECT FREE CHECK BATT END OF CABLE DISCONNECT DC DISCONNECT VOLTAGE ON TOP TO DC POWER POWER CABLE POWER CORD SCALE OF DE SUPPLY OB FROM DC FROM AC OUTLET VIATION METER SERVE POWER SUPPLY POLARITY SH 11 Figure 5 2 AN GRM 114 performance test sheet 13 of 13 TM 11 6625 3016 14 START ARE YOU USING AC NO USING NO INTL BATT SH9 POWERS POWER YES 5 YES MAKE SURE LINE CHECK 1 1 4 CORD IS PLUGGED OTUSE INTO AN ACTIVE SIS DR REXR PANEL AC OUTLET IS FUSE A1A8F1 BLOWN NO SET BATT SWITCH TO YES REFER TO DIS ASSEMBLY ASSEM BLY INSTRUCTIONS TO REMOV
169. CH TO OFF ADJUST ZERO RCVR TRIMMER ON FRONT PANEL TO ZERO METER SET PWR QEE SWITCH TO OFF DEVN METER READS 0 1 MIN DIV ADJUST TION METER AD JUSTMENT SCR W ON FRONT PANEL ser SET SWITCH TO GEN SAW SET RCVR WIDE NARROW SWITCH TO MID SET EXT V DIV SWITCH TO 15 KHz Figure 5 2 AN GRM 114 performance test sheet 4 of 13 TM 11 6625 3016 14 SET MODULA TION SWITCHES TO 1000 0 SET VERT amp HORIZ CONTROLS TO CENTER TRACE ON CRT SET INT MOD CON TROL FOR ASIG NAL ON CRT 4 MAJOR DIV IN HEIGHT READS 10 KHz 1 MIN DIV TM 11 6625 3016 14 SET RCVR WIDE NAR SWITCH NARROW 6 KHz SET INT MOD CON TROL FOR A SIG ON CRT 4 DIV IN HEIGHT ADJUST CON CENTER HORIZ LINE OF CRT SET DEY PWR SWITCH T 6 KHz DEVN METER READS 4 KHz 1 MIN DIV NO 5 12 SET EXT V DIV SWITCH SET GEN RCVR 15 KHz SWITCH TO RCVR SET INT CON TROL FOR A SIG ON CRT 4 MAJ DIV IN HEIGHT ADJUST VERT CON TROL TO CENTER THE SIG ON THE CENTER HORIZ LINE OF CRT SET INT MOD RCVR SWITCH TO INT MOD SET DEV PWR SWITCH TO 2 KHz PRESET CON TROLS PER TABLE 5 4 ADJUST YOL CON TROL FOR AN AUDIBLE TONE FROM UNIT CONNECT COAX CABLE BETWEEN amp TBANS RCVR SCOPE IN JACKS Figure 5 2 AN GRM 114 performance test sheet
170. CO TI TET 969055052 Hit ae diili SPEAKER TO TO FRONT PANEL AIA9J4 Figure 5 15 Mother board A1A2 component location diagram 5 127 TM 11 6625 3016 14 LD A1A3J1 PINS i gy j e ATA3UI REAR VIEW OF 4 13 PINS p 9 fee Se ASUIP3 29 2 1 1 Figure 5 16 Upper floor assembly A1A3 component location diagram 5 128 TM 11 6625 3016 14 Figure 5 17 Transmitter sensor A1A4 component location diagram TM 11 6625 3016 14 L4C5 L3C4 L2C3 LIC2 j TOO e Figure 5 18 108 MHz bandpass filter A1A5 component location diagram FLI Figure 5 19 1200 MHz amplifier A1A6 component location diagram Figure 5 20 Static discharge protector A1A7 component location diagram 5 130 AIA8J2 AIAB8CI AIABBRI _ AIABBR2 AIA8C2 120 240 V AIA8C3 AIABF2 AIABF 3 AIABFI TM 11 6625 3016 14 e _ a PINS FOR AIA8J2 AND AIA8AIPI AIABCRI AIA23JI Figure 5 21 Rear panel A1A8 component location diagram 5 131 TM 11 6625 3016 14 C6 REF FLS FL2 FL3 FLI FL6 Figure 5 22 Duty cycle regulator A1A8A1 component loca
171. D AD JUST TO EX ACTLY 25 V dc TURN OFF POWER SUPPLY AND DIS CONNECT DIGI TAL VOLTMETER CONNECT MM 100 PROBE ALIGATOR CLIP TO OUT PUT OF POWER SUPPLY CONNECT MM 100 PROBE TIP TO OUTPUT OF POWER SUPPLY TURN ON POWER SUPPLY M 1 READS 24 25 TO 25 75 V dc YES TURN OFF POWER SUPPLY REMOVE MM 100 PROBE FROM POWER SUPPLY SET 100 FUNC TION SWITCH TO OHMS SET MM 100 RANGE SWITCH TO X OHMS Figure 5 2 NO TM 11 6625 3016 14 CONNECT MM 100 PROBE ACROSS 300 K 2 1 RESIS TOR OR DECADE REMOVE AND DIS CONNECT INTER NAL BATTERY 22 gt LOAD BOX TO 85 K TO 315 K INiERNAL BAT CABLE pe SET BATTERY LOAD BOX VOLT AMP SWITCH TO SET BATTERY LOAD BOX ADs CONTROL TO 100 REMOVE PROBE FROM RESISTOR AND 100 INPLIT JACK DISCONNECT ALL COAX CABLES FROM FRONT PANEL JACKS CONNECT POWER CORD TO AC LINE OUTLET x SET BATTERY LOAD BOX ADJ CONTROL FOR A READING OF 500 mA ON UNPLUG POWER CORD FROM AC LINE OUTLET E AN GRM 114 performance test sheet 12 of 13 TM 11 6625 3016 14 TURN ON POWER NO SUPPLY amp ADJUST OUTPUT TO 14 v dc METER READS IN THE GREEN S BATT SET BATTERY LOAD BOX VOLT AMP SWIT
172. D RCVR switch 100 figure 5 47 36 Install VOL control assembly 99 to Front Panel 44 figure 5 47 37 Solder tagged wires to assembly at rear of Front Panel 44 figure 5 47 38 Attach hex nut and flat washer 39 Attach knob 99 figure 5 47 40 Use an Allen wrench to attach two 1 8 socket head screws which hold VOL control knob 99 to Front Panel 44 figure 5 47 41 Install EXT SPKR connector assem bly 98 with lockwasher to rear of Front Panel 44 5 47 42 Solder tagged wires to assembly at rear of Front Panel 14 figure 5 47 43 Attach hex nut and washer to Front Panel 44 at EXT SPKR connector 98 figure 5 47 TM 11 6625 3016 14 44 Install SQUELCH control assembly and lug to Front Panel 44 figure 5 47 45 Solder tagged wires to rear of Front Panel 44 figure 5 47 46 Attach hex nut and flat washer 47 Attach knob 97 figure 5 47 48 Use an Allen wrench to attach two 1 8 socket head screws which hold SQUELCH knob 97 to Front Panel 44 Kfigure 5 47 49 Install REF OUT connector 96 figure 5 47 50 Attach CAL mounting block and hex nut to rear of Front Panel 44 figure 5 47 51 Attach tagged coax cable to rear of Front Panel 44 at REF OUT connec tor 96 figure 5 47 52 Attach CAL control 126 to thick portion of threaded mounting block and solder tagged wires to rear of control figure 5 47
173. E BW 10 UNLESS OTHERWISE NOTED 5 ALL RESISTANCE 13 EXPRESSED IN OHMS 4 ALL CAPACITANCE IS EXPRESSED IN PICOFARADS UNLESS OTHERWISE NOTED ALL REF NO S CARRY AN ASSIGNED DESIGNATOR SERIES 1 4 THIS SCHEMATIC CARRIES SERIES THEREFORE RI IS DESIGNATED AiAIBA4RD xem 7 1 SCOPE MAIN P C BD 4887 796 236 500 PART OF 14308 VENT CNTR iNT SYNC PART OF 44301 n 411 V ON EXT SYNC VERT IN VERT GAIN WIPER VERT GAIN PART OF 34308 ANAL VERT INPUT UN ANAL 80URCE xii 2004 200v 4 im Te 2 S s 9 ate 40521 65 M52318 30321 INA 148 H Lors 20 220 DM 3 sny X3A 04066 mr CRE 7 1N4148 R29 2200 s 5 v 4769 3309 6 22 2004 912 OUT CRT VERT DFL CRT VERT DFL 200 OND nee Figure 6 30 TM11 6625 3016 14 Oscilloscope main circuit board A1A18A4 schematic diagram sheet 1 of 2 6 79 6 80 blank PART OF J4302 HOR CTR ANAL HZ IN SWEEP VERN GEN PART OF EXT SWEEP SWEEP CAPACITORS SELECTED SWEEP PART OF J4 308 SYNC ANAL GND GNO GND h
174. E CASE PUT IN A GOOD 11 4 ASLO BLO FUSE UNPLUG LINE CORD FROM AC OUTLET CAREFULLY RE SET PWR QEE UNPLUG LINE BATT SWITCH TO CORD FROM AC MOVE CASE OFF OUTLET FROM UNIT Figure 5 3 Power supply troubleshooting sheet 1 of 16 5 21 TM 11 6625 3016 14 RAISE UPPER FLOOR ASSEMBLY CAREFULLY CHECK FOR OBVIOUS SIGNS OF DAMAGE PLUG LINE CORD INTO AN ACTIVE AC OUTLET IS 20 TO 25 V de YES AT CAPACITOR 1 SET PWR QEF BATT SWITCH TO QEF CHECK DUTY CY CLE REGULATOR OUTPUT VOLT E AGES TEST POINTS ARE GIVEN IN TABLE 1 ARE VOLTAGES PROPER YES NO REFER TO DIS ASSEMBLY ASSEM BLY INSTRUCTIONS TO REMOVE DUTY CYCLE REGULA TOR CAREFULLY RE MOVE D C R FROM REAR PANEL DIS CONNECT 1 1 A1A2P1 AND A1A2P2 SET PWR QEF BATT SWITCH TO PWR SH 3 TABLE 1 TEST POINT VOLTAGE ACCEPTABLE RANGE A1A2P2 PIN 25 12 V dc 12 0 12 5 V dc A1A2P2 PIN 15 48 TO 5 25 V dc A1A2P1 PIN 31 39 V dc 37 0 TO 44 0 V dc NOTE MAX ALLOWABLE RIPPLE IS 50 m V p p TABLE 2 TEST POINT VOLTAGE ACCEPTABLE RANGE A1A2P2 PINS 11 V dc 10 95 TO 411 05 V dc 3 5 19 27 37 A1A2P2 PINS 12 V dc 10 5 TO 13 5 V dc 4 20 22 14 9 35 dc 34 5 TO 35 5 V dc r Pd CHECK REGULA TOR POWER SUPPLY OU
175. EMATIC CARRIES SERIES 4 THEREFORE RI IS DESIGNATED 481 m 1 4 MECH ASSY XMTR SENSOR 7005 2374 000 280 FROM TRANS REC Ji5o2 T Fuso R2 689 178W 10 Elide 4 1502 MECH ASSY xMTR SENSOR 2688 25740 Figure 6 11 11 6625 3016 14 2048 ATTENUATOR REG P S BD Transmitter sensor A1A4 schematic diagram 6 29 6 30 blank DRAFTSMAN NOTES ON SHT BECOMES AIAG JI J602 AIASJ2 NOTES LAST REF NO USED AIASCE 42 14 AAS i 108 MHz BANDPASS FILTER ASSY Cold 2340 280 2 ALL REF NO S CARRY AN ASSIGNED DESIGNATOR aaa a J SERIES e g THIS SCHEMATIC CARRIES SERIES AIAS THEREFORE IS DESIGNATED AIA5CI TM11 6625 3016 14 7 108 MHz BANDPASS FILTER ASSY 70I8 2340 200 A 77 l s J602 8 23 OUTPUT N s TURNS gt TURNS it l 1 Figure 6 12 108 MHz bandpass filter A1A5 schematic diagram 6 31 6 32 blank 1200 MHz BD ASSY 700 2354 900 AIAG 200 MHz AMP ASST 7014 2355 400 DRAFTSMAN NOTES NOTES X 701 1 LAST REF NO USED AVAGFL 1 4702 A A6J2 ue FLI7OI AIAGFLI 1 1 05 RIO 2 ALL RESISTORS ARE 74 10
176. ER BOARD CONNECTOR CONNECT A 5 TO 10 W TRANS MITTER TO THE INPUT OF THE EXT THRULINE RF DEV PWR METER SHOULD READ SAME AS THRU LINE WATT SH 2 Figure 5 10 RF wattmeter troubleshooting sheet 1 of 4 5 94 ARE MITTER METER TION READINGS EQUAL UNKEY 5 DISCONNECT TRANSMITTER FROM INPUT OF THRULINE WATT CONNECT 50 TO 60 w TRANS MITTER TO THE INPUT OF THRU LINE WATTMETER KEY THE TRANS MITTER DO NOT APPLY MODULA TM 11 6625 3016 14 ADJUST 1A1435 ADJUST A1A14R36 M TO MAKE AN GRM ARE AN GRM 114 READING READINGS 114 READING EQUAL TO THRU LINE WATTMETER READING z am EQUAL TO THRU EQUAL LINE READING UNKEY TRANS MITTER CHECK POWER SUPPLY VOLT AGES ON ATA14 BOARD FORWARD POWER SHOWN ON THRULINE WATTMETER BOTH READINGS NORMAL CHECK FOR 12 v de AT PIN 15 OF A1A14 BOARD READ POWER ON DEV PWR METER BOTTOM SCALE RF FUNCTIONS WORK NORMALLY DISCONNECT THRULINE WATT METER FROM AN GRM 114 DEV PWR METER SHOULD READ SAME AS THRU LINE WATTMETER SH 3 ET PWR OFF ATT SWITCH TO OFF UNPLUG LINE CORD FROM E AC OUT
177. EV PWR Control Case Swing Upper Floor out Tilt Front Panel forward FREQ ERROR KHz Meter DEV PWR Control ZERO RCVR Switch Case Swing Upper Floor out Tilt Front Panel forward FREQ ERROR KHz Meter DEV PWR Control ZERO RCVR Switch GEN RCVR Switch Module removal Steps o 59 7 TM 11 6625 3016 14 Table 5 13 Disassembly Sequence Continued Module to be removed 10 MHz REF OUT connector SQUELCH control EXT SPKR connector VOL control INT MOD RCVR switch AM FM switch BFO OFF switch EXT MOD connector EXT ACC connector INT MOD OUT connector 1 KHz INT MOD and INT MOD controls Module disassembly steps i 57 458 i 59 62 i 63 65 i 66 69 i 70 72 i 73 75 i 76 78 i 79 81 i 82 84 i 85 87 i 88 92 Modules which must be removed first Case Disconnect coax cable from 10 MHz REF OUT connector Case Swing Upper Floor out Tilt Front Panel forward FREQ ERROR KHz Meter Frequency Select Switch Assembly FREQUENCY MHz Thumbwheels Case Case Swing Upper Floor out Tilt Front Panel forward FREQ ERROR KHz Meter Frequency Select Switch Assembly FREQUENCY MHz Thumbwheels Case Case Swing Upper Floor out Tilt Front Panel forward FREQ ERROR KHz Meter Frequency Select Switch Assembly FREQUENCY MHz Thumbwheels Case Case Swi
178. EVEL lamp lights If the lamp does not light adjust A1A13R7 until the lamp just lights TM 11 6625 3016 14 8 Set the rf signal generator for an output level of 25 dBm 9 Check that the DEVIATION meter deflects full scale to the right If the meter does not indicate full scale de flection adjust A1A13R91 for a full scale reading NOTE In performing steps 5 through 9 if any adjustments were required repeat these steps until no adjust ments are required 10 Set RCVR WIDE MID NARROW switch to NARROW set VERT con trol to center the trace the EXT switch to 1 the AC DC switch to DC and connect the scope XI probe between the SCOPE IN jack and the tie point of A1A13R25 and A1A13R26 11 Check that the oscilloscope trace deflects 2 volts or less the trace deflection is not correct adjust A1A13R27 for a deflection of 2 volts or less 12 Set the RCVR WIDE MID NARROW switch to WIDE and check that the os cilloscope trace deflects 2 volts or less If the trace deflection is not correct adjust A1A13R27 NOTE In performing steps 11 and 12 if any adjustments were required repeat these steps until no adjust ments are required 13 Remove the scope X1 probe 14 Set the RCVR WIDE MID NARROW switch to NARROW the AM FM switch to FM the 1 5 5 15 KHz switch to 1 5 the SQUELCH con trol fully cw and the FREQUENCY MHz thumbwheels to 000 100 0 5 117 TM 11 6625 3016
179. EXTENDER 79 80 MHZ LOOP IFR 7010 9801 200 51190 TM 11 6625 3016 14 SECTION III TOOL AND REQUIREMENTS TEST SET RADIO AN GRM 114 TOOL OR TEST MAINTENANCE NATIONAL NATO ERUIEMENT CATEGORY NOMENCLATURE STOCK NUMBER TOOL NUMBER REF CODE E PE 39 D PCB ASSY EXTENDER REG AND PWR SUPPLY IFR 7010 9801 300 51190 40 D PCB ASSY EXTENDER 250 KHZ I F MONITOR IFR 7010 9801 400 51190 41 D RESISTOR 4700 1 4 W IFR 4702 0471 003 51190 42 D COAX CABLE WITH SNIFFER LOOP IFR 6050 0534 800 51190 43 D RESISTOR 30011 1 4W IFR 4706 3011 001 51190 NOTE TEST EQUIPMENT WITH EQUIVALENT SPECI FICATIONS CAN BE SUBSTITUTED FOR ABOVE LISTED ITEMS x D 9 TM m REFERENCE 11 6625 3016 14 Replacement of tion unit Replacement of Replacement aiignment Replacement of tion of unit Replacement or Hign Frequency Replacement or 1050 MHz Multiplier Amplifier assembly Replacement or FM AM Generator assembly Replacement or 250 kHz I F Replacement or Regulator and Power Supply assembly Replacement or 1200 2200 MHz Oscillator assembly Replacement or 108 MHz Bandpass Filter assembly Replacement or 100 MHz Amplitfier 108 MHz Mixer assembly Repair by replacement of next higher assembly Monitor assembly SECTION IV REMARKS FOR AN GRM 114 MAINTENANCE ALLOCATION CHART REMARKS upper floor asse
180. F BATT switch to BATT DEV PWR X1 WATTS GEN RCVR GEN 11 Observe the digital voltmeter and ad AM FM As recorded just the dc power supply to decrease the output voltage and check that the in step b RCVR WIDE MID NARRO V a If deviation AN GRM 114 power cuts off when recorded in the digital voltmeter indicates be step b is O tween 10 8 and 11 2 volts dc If the to 9 kHz AN GRM 114 power does not cutoff NARROW correctly adjust A1A14R14 until the b If devia proper cutoff voltage level is achieved ed in step b 12 Repeat steps 9 through 11 until no is lt 9 adjustment is required to achieve pro WIDE per cutoff voltage AUTO ZERO BATT AUTO AC DC DC 13 Adjust the dc power supply for a 14 FREQUENCY MHz As recorded volt dc output as indicated on the in step h digital vollmeter and set PWR OFF BATT to BATT and depress twice 14 Hold the AUTO ZERO BATT switch in the ZERO BATT position and check that the DEVIATION KHz meter indicates 14 on the 0 to 20 Scale If the DEVIATION KHz meter indication is not correct ad just A1A14R28 for an indication of 14 15 Disconnect DC Power Supply and reconnect internal battery 16 Turn off all power remove all cables and test instruments and reassemble the AN GRM 114 Power Monitor A1A17 Power Monitor A1A17 is aligned using the following procedure 1 Remove all power from the AN GRM 114 and disassemble the AN GRM 114 to gain access
181. GC and AFC circuits allow measurements to be made without level or frequent y settings h For the DIST distortion positions of the RANGE control 0 1096 is read on the top scale and 0 3096 is read on the 0 to 3 scale Dis tortion measurements use a 1 kHz 50 m V 22V rms tone only Internal AGC and AFC circuits allow measurements to be made without level or frequency settings 3 11 Power Supply Theory Refer figurel 3 12 for a block diagram a Power may he supplied to the AN GRM 114 from the hatter y from an external dc source or from an external ac source When operating on battery voltage 12 V is applied from the battery to the Duty Cycle Regulator through TM 11 6625 3016 14 the battery fuse For operation on an external dc voltage 11 to 28 V dc is applied to the Duty Cycle Regulator through the external dc fuse For operating on an ac voltage the ac voltage is connected to the transformer through a fuse on the Rear Panel transformer steps down the input voltage to 9 V ac This voltage is rectified by two bridge rectifiers Unregulated dc voltage is fed to the Duty Cycle Regulator When operating on an external ac or dc voltage rectified ac or ex ternal dc is applied to the PWR OFF BATT switch When the switch is in the PWR positions voltage is applied through tile normally close d contacts of the Duty Cycle Regulator relay to the Duty Cycle Regulator circuits To operate on battery the
182. GS elc cete pee es uo uy 45v MECH ASSY FREQ SELECT Sw 701 54 E e BCD eco BCD BCD THUMBWHEEL THUMBWHEEL THUMBWHEEL THUMBWHEEL THUMBWHEEL THUMBWHEEL THUMBWHEEL SWITCH SWITCH SWITCH SWITCH SWITCH SWITCH di Swe 35 swe g a 15 928 M M MON o z gt iiid FEFE zii EFF 2888 oooo ooog 999 ooo 2898 59 52 g ces Figure 6 41 Frequency select switch 1 27 schematic diagram 6 105 6 106 blank NOTES LAST REF NO USED AIAZBFLS 4028 2 AIAgBAICIT AIAR BAILE 26 2094 AIAZBAZES AlAgBAgLS 9 9 AINZGAZRZS AIBZBAZALI ALL RESISTORS ARE 1 8 4 10 UNLESS OTHERWISE NOTED ALL RESISTANCE IB EXPRESSED IN DHMS UNLESS OTHERWISE NOTED ALL CAPACITANCE 18 EXPRESSED IN PICOFARADS UNLESS OTHERWISE NOTED ALL CAPACITORS ARE DISC 2 3 5 ALL POLARIZED CAPACITORS ARE TANTALUM ALL CAPACITORS LESS THAN ARE 8 NOTED NCUCTORS ARE FORMED BY THE STRAY INDUCTANCE FROM CAPACITOR LEAD 0 61 LONG TYP 3 PLOS 65 C9 8 AND RIZ ON 80 2 ARE SET AT TEST 9 4 7 RESISTORS NOMINAL VALUE INSTALLED IS 3 9 k SELECT RANGE 150070 3900 78 1 10 4701 0152 003 1500 4701 0182 003
183. H T 150 TO 32 SET MM 109 BANGE SWITCH TO 1 VOLT SWITCH 1 VOLT SET MM 100 BANGE METER READS 054 TO 075 V rms Figure 5 2 AN GRM 114 performance test sheet 10 of 13 TM 11 6625 3016 14 SET MM 100 RANGE SWITCH TO AM AND FUNCTION SWITCH TO HLZ SET SWITCH AND GEN RCVR SWITCH TO GEN SET EXT V DIV SWITCH TO 15 KHz SET SWEEP SWITCH TO 1 mS ADJUST INT MOD CONTROL FOR 30 AM MODULA TION ON CRT 5 18 ALL AN GRM 114 FUNCTIONS AP PEAR TO WORK NORMALLY THIS COMPLETES AN GRM 114 TEST PROCEDURE DESIRED OF AM MODULATION TURN INT MOD CONTROL FULLY ccw TO SET 100 RANGE SWITCH TO 10 VOLTS TURN 1 KHz INT MOD C Y cw RECORD MM 100 METER READING TURN 1 KHz INT MOD CONTROL FULLY ccw TO QFE SET MODULATION 1100 0 Hz SET MM 100 TO 1 VOLT ADJ INT MOD CONTROL FOR A READING 10 OF READING RECORDED Figure 5 2 AN GRM 114 performance test sheet 11 of 13 SET MM 100 RANGE SWITCH TO 9 30 DIST FULLY cw TURN 1 KHz INT CONTROL FULLY ccw TO OFF DISCONNECT COAX CABLE FROM MM 100 INPUT JACK CONNECT MM 100 PROBE PUT JACK OF 100 SET SWITCH ON 109 PROBE TO X1 SET MM 100 RANGE SWITCH TO 30 VOLTS CONNECT A DIGI TAL VOLTMETER TO OUTPUT OF A VARIABLE DC POWER SUPPLY TURN ON POWER SUPPLY AN
184. HV 30 12897 AN URM 184A 334A 28480 5 1 TM 11 6625 3016 14 5 2 Table 5 1 Tools and Test Equipment Continued Tool or test equipment VSWR Bridge Wiltron Function Generator Signal Generator Sweep Signal Generator Tracking generator Triple output power supply 50V 2 Amp 50 Q termination Power supply 10 to 30 V variable 10 Amp Wattmeter AN URM 120 Modulation meter VHF transmitter R F Power meter with power detector head Comp assy AGC monitor meter Comp assy battery load box Resistor 390 Q PCB assy extender 79 80 MHz Loop PCB assy extender reg amp pwr supply PCB assy extender 250 kHz I F Tool number Wiltron 60 N50 87807 SG 1133 AN USM 308 V 1 Wavetek 2002 23338 SG 1125 U LAMBDA LPT 7202FM 80103 IFR 2650 0010 200 51190 LAMBDA LK351FM 80103 AN URM 120 ME 57 U RT 524 VRC 42BD 04901 41 41A 04901 IFR 7003 9801 500 51190 IFR 1003 9801 600 51190 IFR 4702 0394 003 51190 IFR 7010 9801 200 51190 IFR 7010 9801 300 51190 IFR 7010 9801 400 51190 TM 11 6625 3016 14 Table 5 1 Tools and Test Equipment Continued Tool or test equipment Test lead BNC to SMB 2 Test lead BNC to SMA 2 Test lead BNC to BNC 2 Connector SMB tee Connector BNC tee Adapter SMB Jack to Jack Adapter SMA Jack to Jack High frequency multiplier mixer sniffer Extender cabl
185. IL pe AND CUT OFF ckts A1A14 REGULA GOOD ONE ON PITCH I SET APPEAR TO WORK TOR POWER REAR PANEL s PROPERLY SUPPLY BOARD INSTALL A1A14 FALLS INSTALL GOOD REGULATOR TO ABOUT YES REGULATOR POWER SUPPLY 1 VOLT BOARD POWER SUPPLY BOARD NO SET PWR QEF MONITOR VOLT BATT SWITCH TO AGE AT A1A14J1 OFF PIN 4 MONITOR VOLT 41V AGE AT A1A14J1 OR PIN 3 AS MORE SWITCH 15 SET YES SH 14 SH 14 SH 14 Figure 5 3 Power supply troubleshooting sheet 13 of 16 5 33 TM 11 6625 3016 14 FALLS YES bt NO c c SET PWR OFF SWITCH 7 UNPLUG INE CORD FROM C OUTLET DISCHARGE FIL TER CAPACITORS USE OHMMETER TO ISOLATE PRO BLEM FROBLEM WITH PWR OFF SWITCH OR ASSOC WIRING REPAIR OR RE PLACE AS NECESSARY SH 3 Figure 5 34 Power supply troubleshooting sheet 14 of 16 5 34 A1A14 REGULA TOR POWER SUPPLY BOARD IS BAD REMOVE BAD 4 ckt BOARD AND INSTALL A GOOD ONE 2 SH9 A1A14 REGULA TOR POWER SUPPLY BOARD IS BAD PWR OFF TT SWITCH TO UNPLUG CINE CORD FROM AC OUTLET REMOVE BAD A1A14 ckt BOARD AND INSTALL A GOOD ONE DUTY CY CLE REGULATOR ASSEMBLY IS BAD REMOVE BAD A1A8A1 ASSY AND INSTALL A GOOD ONE ON REAR PANEL CHECK A1A8F2 7 1 2A FUSE ON REAR PANEL 18 FUSE BLOWN DID YOU PUT THI
186. ION CONTROL TO 80 dBm SETTING MEASURE 1199 9 MHz AT 1 19 4 WITH NOTE LEVEL MEASURE 111 1 MHz SIGNAL AT 19 J5 WITH SA NOTE LEVEL PROBLEM INDI CATED WITH HIGH LEVEL AM PLIFIER A1A28 SET BATT SWITCH TO QFF REPLACE HIGH LEVEL AM PLIFIER A1A28 PROBLEM IS IN DICA1ED WITH 1ST MIXER A1A19 SET PWH QOFF BATT SWITCH REPLACE 15 MIXER 21419 SET PWH QEE SWITCH TO PWR TM 11 6625 3016 14 5 73 TM 11 6625 3016 14 se Swi i CH ADJUST 1 kHz TO AM MEASURE INT MOD CONTROL 111 1 MHz AT TO MIDRANGE TRANS RCVR SA MEASURE 111 1 SIGNAL AT CON 15 PRESENT NECTOR WITH SA gt 7 de NO IS MEASURE SIGNAL PRESENT AT 24 ON CARRIER 2777 Ju E OSCILLOSCOPE a SIGNAL GENERATOR 2443 15 PWR OFF BATTSWITCH OFF NN x 1 TA REPLACE A1A2443 A YES SET PWR OFF BATT 244329 L WITH OSCILLOSCOPE TO PWR AE y PROBLEM WITH DUAL SWITCH WIRING ERATOR A1A12 REPLACE A1A12 IF SET NECESSAP Y SET BATI SWITCH TO ur ET TO PWE rutas PROBLEM
187. ITH HIGH FREQ MULT MIX ER TURN POWER OFF REPLACE A1A26 TURN POWER ON Figure 5 5 Receiver troubleshooting sheet 8 of 14 TM 11 6625 3016 14 26 5 9 PROBLEM INDICAT ED WITH 2 PRESCALER TURN POWER OFF REPLACE TURN POWER ON TM 11 6625 3016 14 MONITOR 1 9 3 WITH VOLTMETER CHANGE FREQ MHz SWITCHES TO 100 000 0 USE ExT D C TO VARY F vco ABOVE AND BELOW 1300 MHz 5 52 MEASURE SIGNAL AT A1A9J2 WITH SA 10 MHz 5 dBm TO YES 5 dBm AT A1A9J2 NO MEASURE SIGNAL A1A3A5J4 WITH SA 10MHz 5 dBm TO 5 dBm AT YES NO PROBLEM INDICAT ED WITH MASTER OSCILLATOR OUT PUT DISTRIBUTION AMPL TURN POW ER OFF REPLACE 5 TURN POWER ON PROBLEM INDICAT ED WITH HIGH FREQ PHASE LOCK BD TURN POWER OFF REPLACE A1A9 TURN POW ER ON A1A27 INPUTS TO 4149 FREQ PHASE PROPER PROBLEM INDICAT PROBLEM INDICAT ED WITH 2ND MIXER TURN POWER OFF RE PLACE A1A20 TURN POWER ON Figure 5 5 Receiver troubleshooting sheet 9 of 14 VOLTAGE A1A1134 SHOULD INCREASE TO 65 v DC TO 75 AS F yco IN CREASES TO 1300 MHz MONITOR A1A11J4 WITH OSCILLO SCOPE USE EXTER NAL D C TO VARY F vco ABOVE ANO BELOW 1300 MHz PROBLEM INDICAT ED WITH V C O TUNER BD TURN P
188. IVER 111 1 MHz 40 dBm TO 44 dBm YES NO MEASURE SIGNAL AT A1A7 J2 WITH SA YES A1A7 STATIC DIS CHARGE PROTEC TOR IS BAD SET PWR QEE BATT SWITCH TO REPLACE A1A7 STATIC DIS CHARGE PROTEC TOR NOTE LEVEL A1A17 POWER MONITOR IS BAD REPL ATE A1A17 MONITOR SET PWR QEE BATT SWITCH TO SET PWR OFF BATT SWITCH TO PWR SHT 1 MEASURE SIGNAL AT A1A19 J4 WITH SA READ dB LEVEL OF 1199 9 MHz SIGNAL MEASURE SIGNAL AT A1A19 J3 WITH SA 1311 MHz 5 dBm TO 8 dBm YES SHT 1 NO PROBLEM INDI CATED WITH 15 LOCAL OSCIL LATOR SH5 Figure 5 5 Receiver troubleshooting sheet 2 of 14 TM 11 6625 3016 14 NOTE LEVEL SH 3 A1A19 1ST MIXER IS BAD SET PWR OFF BATT SWITCH TO OFF REPLACE 19 15 MIXER SET PWR OFE BATT SWITCH TO PWR TM 11 6625 3016 14 MEASURE SIGNAL AT A1A20P4 WITH SA READ dB LEVEL OF 1199 9 MHz SIGNAL ISIT 17 dB TO NO 22dB gt AT A1A19J4 YES MEASURE SIGNAL AT A1A20J5 WITH SA i 1079 9 P MHz NO dBm TO 8 dBm YES i LRAD SET PWR SWITCH ITO OFF AND CHECK ASSOCIATED WIRING REMOVE A1A13 250 kHz I F MONI TOR AUDIO BOARD PROBLEM INDI CATED WITH 2ND LOCAL OSCILLA TOR REPLACE A1A20 2ND MIXER SET PWR OFF BATT SWITCH TO PWR NOTE LEVEL MEASURE 1199 9
189. K LT 2400 PCG ASSY HIGH FREQ LOCK CKT 7010 2548 300 Figure 6 17 High frequency phase lock A1A9 schematic diagram 6 41 6 42 blank TM11 6625 3016 14 L h La t 5 TM qo MCIZOISL 27005 47 10 711 PRESCALER D 22301 7 9 B C30 O01 GuF CHIP DRAFTSMAN NOTES vec Es ES ON SHT i amp 2 J2502 BECOMES 2 2 Mm Fait RA oats 42501 AIAIOU vie SCALER 5 i zi pa ie d C ORS Jg ug P2502 BI sv FR Delon AR Sa AR ees T Y Fone 2 ALL RESISTORS ARE 1 4 W 1 0 UNLESS OTHERWISE NOTED 79780 LOOP P C ED ASSY 3 ALL RESISTANCE 15 EXPRESSED OHMS UNLESS OTHERWISE NOTED 100 232 400 J Kes Pen as Sa ss 4 ALL IS EXPRESSED IN PICOFARADS UNLESS OTHERWISE NOTED 8 R34 18 SET AT TEST FROM THE FOLLOWING VALUES 1 8 ie 1090 1100 189 1020 1130 1240 1080 1150 1270 1070 1180 35v 8 ALL REF 495 CARRY AN ASSIGNED DESIGNATOR SERIES THIS s CARRIES SERIES AIA Q THEREFORE RI I DESIGNATED 0223 TAIORD 10 Y RE DUE t VE WIO R36 4700 eu 283251 i 5 rri A Peso lt 2 79 80 g LO LAM
190. LACE 24 SET PWR OFF ZATT SwiTCH TO PWR 5 75 TM 11 6625 3016 14 Er T MEASURE 111 1 7 gt YES MHz SIGNAL AT 18 dB lt EL A1A49 6 WITH SAT arasi MEASURE 111 1 MHz SIGNAL A1A19J1 WITH SA SH 6 N 2 t6 gt 157 MIXER d 1517 YES ISIT 15 BAD SET PWR 7 20 dBm TO 20 dBm 18 OFF BATT SWITCH Y Pan 30 kas 2 i REPLACE 1519 MEASURE VOLTAGE MEASURE VOLTAGE SET PWE OF ATA28F L1 WITH AT A1A19FL1 pem PEU SWIT Cri gt VOLTMETER a Spt MNA pea je YES E RELAY DRIVER RUBLE 1425 15 BAD A1A28 IS BAD SET PWR OFF SET PWR OEFF BATT SWITCH BATT SWITCH TO OFF REPLACE 1 28 SET PWR OFE BATT SWITCH TO PWR REPLACE ATA2t SE PWR OEF BATT SWITCH TO O PWR Figure 5 8 RF signal generator troubleshooting sheet 5 of 19 5 76 IS IT 157 MIXER A1A19 10 5 V DC TO IS BAD SET PWR 11 V DC SWITCH RELAY DRIVER REPLACE A1A19 ATA25 ISBAD PWR OFF SET PWR OFF EWE OEE BATT SW SWITCH BATT SWITCH TO PWR REPLACE A1A25 SET PWR OFF BATT SWITCH TO PWR AT A1A17F12 MEASURE VOLTAS WITH VOLTMETER zd 105 v YES lt
191. LET DISCHARGE FIL TER CAPACITORS USE OHMMETER TO ISOLATE PRO BLEM REPAIR OR REPLACE AS NECESSARY REPLACE A1A14 REGULATOR POWER SUPPLY BOARD SH 9 SH 13 SET BATT SWITCH TO OFF UNPLUG LINE CORD FROM OUTLET REFER TO DIS ASSEMBLY ASSEM BLY INSTRUC TIONS TO RE MOVE CASE CAREFULLY RE MOVE CASE RE MOVE A1A14 REGULATOR POWER SUPPLY BOARD MONITOR A1A14J1 PIN 1 WITH VOLTMETER PLUG LINE CORD INTO AC OUTLET SET PWR QEF BATT SWITCH TO PWR PRESENT YES PROBLEM WITH WIRING OR CON NECTIONS FROM A1A8 REAR EL THRU A1A8P2 Bees A1A14 SET PWR OFF BATT SWITCH TO OFF UNPLUG LINE CORD FROM AC OUTLET DISCHARGE FIL TER CAPACITORS USE OHMMETER TO ISOLATE PRO BLEM REPAIR OR REPLACE AS NECESSARY REPLACE A1A14 REGULATOR POW ER SUPPLY BOARD SET PWR OFF BALT SWITCH TO OFF UNPLUG POWER CORD FROM AC OUTLET DISCHARGE FIL TER CAPACITORS USE OHMMETER TO CHECK RESIS TANCE FROM A1A14J1 PIN 1 AND A1A14J1 PIN C YES PROBLEM WITH AUTO ZERO BATT SWITCH DEVIA TION METER OR ASSOC WIRING USE OHMMETER TO ISOLATE PRO BLEM REPAIR OR REPLACE AS NECESSARY NO Figure 5 3 Power supply troubleshooting sheet 11 of 16 TM 11 6625 3016 14 A1A14 REGULA TOR POWER SUP PLY BOARD 15 BAD INSTALL A GOOD A1A14 REGULA TOR POWER SUPPLY BOARD
192. LET s 8 Figure 5 10 RF wattmeter troubleshooting sheet 2 of 4 5 95 TM 11 6625 3016 14 3 4 105 NO CONFIRM 39 V dc A1A14 BOARD AT PIN 7 A1A14 15 13 5 V dc BOARD REPLACE BOARD YES UNPLUG EXTEN CHECK FOR 35 DER BOARD V dc AT PINS 9 YES m FROM MOTHER AND 11 of A1A14 BOARD CON BOARD NECTOR NO PLUG A1A14 BOARD INTO 345 NO MOTHER BOARD TO CONNECTOR 35 5 V dc YES LOWER THE PER FLOOR ASSEMBLY AND SECURE IT CHECK FOR 11 A1A14 BOARD V dc AT PIN 5 IS BAD OF A1A14 BOARD REPLACE SH 1 REFER TO 015 ASSEMBLY ASSEMBLY IN STRUCTIONS TO PUT CASE ON UNIT NO CONFIRM 12 V dc A1A14 BOARD AT PINEOF IS BAD A1A14 BOARD REPLACE 11 05 V dc YES YES CAREFULLY PUT SH4 SH1 CASE ON UNIT Figure 5 10 RF wattmeter troubleshooting sheet 3 of 4 POWER SUPPLY APPEARS TO BE WORKING NORMALLY SET PWR QEF BATT SWITCH TO QFE REMOVE A1A14 BOARD FROM EXTENDER BOARD 15 DEV PWR NO METER SWITCH SET TO X1 YES REFER TO MOTHER BOARD AND FRONT PAN EL SCHEMATICS CHECK CONTIN UITY FROM PIN 14 OF EXTENDER BOARD TO DEV PWR METER REFER TO MOTHER BOARD AND FRONT PAN EL CKT SCHEMATICS CHECK CONTIN UITY FROM PIN P OF EXTENDER BOARD TO DEV PWR METER CONTINUITY NO PLUG A GOOD 14 BOARD
193. LLIGATOR CLIP FROM PROBE TIP PUT IN A GOOD 1 32 A FUSE NO YES REMOVE PROBE FROM MM 100 INPUT JACK USE A PIECE OF WIRE TO SHORT CENTER CONTACT AND BODY OF INPUT JACK TO GETHER MM 100 PROBE YES IS BAD REPAIR OR REPLACE AS NECESSARY SH 3 Figure 5 12 MM 100 multimeter troubleshooting sheet 1 of 10 5 102 UNCLIP LEAD ALLIGATOR CLIP FROM PROBE TIP Le ACROSS A 300 2 15 RESISTANCE READ METER EM rt CONNECT PROBE 285 TO 315 YES REMOVE PROBE FROM 300 RESISTANCE SET RANGE SWITCH TO QHMS NO REMOVE PROBE FROM 300 RESISTANCE REFER TO DISASS EMBLY ASSEMBLY INSTRUCTIONS wa 100 CONNECT PROBE ACROSS 300 RESISTANCE p ADJUST A2A1A1R119 ON 100 CKT BOARD FOR A READING OF 300 NO YES CONNECT PROBE ACROSS A 30 19 RESISTANCE READ METER SH 3 TM 11 6625 3016 14 USE AN OHM METER TO VERIFY CONTINUITY FROM EXT ACC PLUG PIN 1 TO END OF C47 RLPAIR BAD A2A1A1A1 INTER CONNECT CABLE ASSY VERIFY CONTIN UITY BETWEEN EXT ACC PLUG PIN 9 AND END OF A2A1A1C47 SH3 Figure 5 12 MM 100 multimeter troubleshooting sheet 2 of 10 5 103 TM 11 6625 3016 14 CONNECT A DIG VOLTMETER TO TE CHIT PLT OF VARIABLE DC iy JUST POWER Deis Y
194. LOCATE A1A2J2 CHECK FOR SHORT ckt ON 5 12 AND 39 V LINES AT A1A2J2 REPAIR OR RE PLACE AS NECESSARY Figure 5 3 Power supply DISCHAGE FIL TER CAPACITORS CHECK FOR OPEN ckt BETWEEN A1A2P2 AND A1ABA1J1 WITH OHMMETER REPAIR OR PLACE AS NECESSARY RETURN TO START ON SHEET 1 CHECK FOR OPEN ckt BETWEEN A1A8A1FL2 AND A1A2J2 PINS 23 26 WITH OHMMETER RETURN TO START ON SHEET 1 IS 10 95 11 05 V AT 2 2 PINS 27 37 CONNECT 1 2 1 TO 1 2 1 IS 34 5 TO 35 5 V dc AT 9 15 10 5 TO 13 5 V dc AT A1A2P2 PIN 20 troubleshooting sheet 5 of 16 TM 11 6625 3016 14 MONITOR 5 V de SUPPLY AT Wir VOLTMETER DISCONNECT ONE ASSEMBLY FROM 5 V de LINE SET PWR QFF BATT SWITCH TO CHECK READING ON VOLTMETER POWER SUPPLIES APPEAR TO BE WORKING PROPER LY USING AC LINE POWER 5 25 TM 11 6625 3016 14 MONITOR 11 V dc LIN ATA2P2 ADJUST A1A14R24 TO GET 11 V dc AIA2P2 15 11V dc AT ATA2P2 SET PWB OFF BATT SWITCH TO RF A1A14 REGULATOR POWER SUPPLY BOARD SET PWRB OF T SWITCH TO PWR 14 IS 37 TO NO SET PWB QFF 44 V dc AT BATT SWITCH TO A1A14J1 PIN 72 YES A1A14 REGULA REMOVE A1A14 TOR POWER REGULATOR SUPPLY BOA
195. LOWLY cw UNTIL ANT INPUT LEVEL LAMP LIGHTS T BFO SWITCH SET FREQUENCY MHz SWITCHES TO 000 000 0 s NO BETWEEN 2 AND 20 TURN SQUELCH CONTROL cw UNTIL ANT INPUT LEVEL LAMP GOES OFF SET DEV PWR SWITCH TO SIG Figure 5 2 AN GRM 114 performance test sheet 2 of 13 TM 11 6625 3016 14 ADJUST ZERO RCVR TRIMMER GN ERONT PANEL TM 11 6625 3016 14 TURN ANALY DISPR CONTROL cow OFF ADJUST VERT amp HORIZ CONTROLS CENTER THE TRACE ON CRT SET FREQUENCY MHz SWITCHES TO 060 010 0 000 00 o o n co RARE ECE nn N Figure 5 2 SET EXT SWITCH TO 6 KHz VERT amp HORIZ CONTROLS SET FREQUENCY MHz SWITCHES TO FREQ ERROR METER READS SE kHz 1 MI TRACE IS 5 KHz 1 SET EREQUENCY MHz SWITCHES TO 000 000 0 SET 1 5 5 15 KHz X3 V DIV You SWITCH TO 1 5 KHz SET EXT V DIV SWITCH TO 1 5 KHz NTER THE E ON CHT ADJUST HORJZ amp VERT CONTROLS TO CENTER THE TRACE ON CRT 50 SET EREQUENCY MHz SWITCHES TO 000 001 0 NO DIV NG MIN p AN DRM 114 performance test sheet 3 of SET FREQUENCY MHz SWITCHES TO 100 100 0 13 ERROR METER READS 0 SET GEN RCVR SWITCH TO RCVR SET FREQUENCY MHz SWITCHES TO 000 000 0 SET AUTO ZERO BATT SWIT
196. M 114 arc listed in able 1 4 to help you inven tory items required for safe and efficient opcration B 1 B 2 blank TM 11 6625 3016 14 APPENDIX D MAINTENANCE ALLOCATION CHART SECTION 1 1 General This maintenance allocation chart provides a summary of the maintenance operations for Test Set AN GRM 114 It authorizes categories of maintenance for specific maintenance func tions on repairable items and components and the tools and equipment required to perform each function This MAC appendix may be used as an aid in planning maintenance operations 2 Maintenance Functions Maintenance functions will be limited to and defined as follows Inspect To determine the serviceability y of an item by comparing its physical mechanical and electrical characteristics with established stan dards through examination b Test To verify serviceability and to de tect incipient failure by measuring the mechanical or electrical characteristics of an item and com paring these characteristics with prescribed stan dards Service Operations required periodical ly to keep an item in proper operating condition such as to clean to preserve to paint and to lubri cate d Adjust Maintain within prescribed lim its by bringing into proper or exact position or by setting the operation characteristics to the spe cified parameters e Align Maintain within prescribed limits by bringing into proper or exact position or
197. M ANALYZER MODULE 2 ALALSA3 Test P N 7030 2363 300 Replace PCR ASSY NO 2 SPECTRUM ANALYZER 1 1 1 P N 7010 2359 4 0 Test Repair ASSY SCOPE MAIN 1 1 4 7010 2362 500 Test Replace MECH ASSY SPECTRUM ANALYZER FRONT PLATE 1 18 5 P N 7028 2366 900 Inspect Replace MECH ASSY HORIZONTAL SWEEP SWITCH AlAIBASAl P N 7013 2366 700 Test Repair ORSEL MA Form 6031 1 Ju 76 MAINTENANCE CATEGORY uno 11 6625 3016 14 Visual 1 4 7 11 24 1 4 7 11 24 28 40 24 Visual 4 9 10 12 24 4 9 10 12 24 28 29 2 Visual 3 14 24 3 4 7 14 24 29 24 3 5 7 14 24 i 29 26 M H Visual 4 6 7 16 24 1 4 6 7 16 24 28 30 24 4 6 7 16 24 28 24 1 4 5 7 16 24 28 24 M 4 24 30 24 1 4 6 7 16 24 78 24 1 4 6 7 16 24 28 24 M 1 4 5 7 16 24 28 24 Visual 24 4 24 24 HISA FM 2314 79 TM 11 6625 3016 14 SECTION MAINTENANCE ALLOCATION CHART TEST RADIO AN GRM 114 4 02 3 MAINTENANCE CATEGORY GROUP COMPONENT ASSEMBLY MAINTENANCE 010170502 MECH ASSY VERTICAL SAIN SWITCH A1A18A5A2 Test 0 2 P N 7013 2366 800 Replace 0 5 010170503 WIRE HARNESS ASSY SPECTRUM ANALYZER AjA18A5A3 Test 0 4 4 24 P N 7907
198. MHz SIGNAL AT A1A16P2 WITH SA SA SIGNAL AT A1A19J4 NO A1A15 1200 MHz DIODE SWITCH IS BAD SET PWR OFF BATI SWITCH TO OFF REPLACE 16 1200 MHz DIODE SWITCH ET PWR QEF SWITCH TO R Figure 5 5 Receiver troubleshooting sheet 3 of 14 MEASURE 1199 9 MHz SIGNAL AT A1A16J3 WITH SH 4 SH 12 TM 11 6625 3016 14 ISIT YES A1A16 1200 MHz ss DIODE SWITCH A1A19J4 IS BAD NO A1A6 1200 MHz AMPLIFIER IS BAD REPLACE A1A16 1200 MHz DIODE SWITCH REPLACE A1A6 1200 MHz AMPLI SET PWR OFE FIER SET PWR BATT SWITCH TO SWITCH PWR TO PWR Figure 5 5 Receiver troubleshooting sheet 4 of 14 TM 11 6625 3016 14 7 15 LEFT NO lt HIGH FREQ LAMP 7 NON YES AT A1A3A2J1 MEASURE SIGNAL WITH SA 1311 MHZ 45 TO 13 1ST LOCAL OSCIL LATOR APPEARS TO BE WORKING PROPERLY AT THIS FREQUENCY Figure 5 5 MONITOR TEST POINT OF HIGH t REQ MU LT MIXER WITH REFER TABLE 56 PROBLEM INDICAT ED WITH 1200 2200 MHz OSCILLATOR TURN POWER OFT REPLACE AiA3A2 TURN POWER ON EXERCISE MHz SWITCHES ON FRONT PANEL AND OBSERVE SPEC TRUM ANALYZER DISPLAY 16 JSH6 iS SA DISPLAY OF T P PROPER D NO MEASURE VOLT AGE AT A1A9F L30 WITH VOLTMETER IS 6 V dc TO 1V
199. N GRM 114 Troubleshooting General Figures 5 3 through 5 12 and through 5 9 provide troubleshooting information for the AN GRM 114 These proce dures set forth specific methods to isolate a pro blem to a mechanical assembly or circuit board The technician is then referred back to the per formance test figure 5 2 Use these procedures as a guide to problem isolation b Presentation The troubleshooting pro cedures provided are given in the form of flow 5 6 AN GRM 114 setting INT MOD control to OFF 1 KHz INT MOD control to OFF GEN RCVR switch to GEN INT MOD RCVR switch to RCVR HI LVL NORM switch to uV X 100 FREQUENCY MHz switches to 0000500 RF LEVEL BFO INJECTION dial to 10 EXT V DIV switch to 01 1 5 5 15 KHz switch to 15 charts Follow the step by step directions given within these flowcharts Set switches on the AN GRM 114 according to tables 5 5 5 7 and only when these tables are referenced within the flowcharts Perform these troubleshooting proce dures when referenced by their figure number from the performance test figure 5 2 or when a problem is apparent in one of the assemblies covered Figure 2 1 is an example of the applica tion of flowchart symbols When necessary refer to component location diagrams located at the end of the alignment procedures to find referenc ed connectors jacks and potentiometers TM 11 6625 3016 14 TEST PROCEDURE START INDICATES NOTES BEGIN
200. NDICAT ED ON DIGITAL VOLTMETER SET SWEEP SWITCH TO 1 mS AS NO SPECIFIED inc TM 11 6625 3016 14 Figure 5 6 Oscilloscope and spectrum analyzer troubleshooting sheet 4 of 7 5 61 TM 11 6625 3016 14 ADJUST OUTPUT OF FUNCTION GEN ERATOR FOR A SIGNAL 8 MAJOR DIV IN HEIGHT ON CRT CHANGE FUNC SET ANALY TION GENERATOR DISPR CONTROL FREQUENCY TO T ON MINIMUM 1 MHz DISPR VERIFY SIGNAL SET FREQUENCY ON CRT IS gt MHz SWITCHES TO 125 500 0 5 5 MAJOR DIV IN HEIGHT AS SPECIFIED ABOVE NO VERIFY TRACE ON CRT IS AT 108 TO 109 dBm YES SH2 REDUCE OUTPUT OF FUNCTION GEN ERATOR TO Q DISCONNECT FROM SCOPE IN JACK AS SPECIFIED ABOVE NO SH2 YES SH6 Figure 5 6 Oscilloscope and spectrum analyzer troubleshooting sheet 5 of 7 5 62 o ET PWR OFF ATT SWITCH TO FF AN RF SIGNAL GENERA TOR TO ANT INPUT JACK SET SIGNAL GEN ERATOR TO 125 5000 MHz SET OUTPUT LEV EL OF GENERA TOR TO 40 dBm SET PWR OFE BATT SWITCH TO PWR VERIFY DISPLAY ED SIGNAL LEVEL IS 40 dBm 1 dBm Figure 5 6 39 NO TO 41 dBm YES ADJUST OUTPUT OF SIGNAL GEN ERATOR TO 50 dBm VERIFY DISPLAY ED SIGNAL LEVEL IS 50 dBm 1 dBm 49 51 dBm YES REDUCE OUTPUT OF SIGNAL GEN ERATOR TO 60 dBm VERIFY DISPLAY ED SIGNAL LEVEL IS 6
201. NECT DIGITAL VOLTMETER ACROSS LOAD RESISTANCE ADJUST OUTPUT SET 100 OF FUNCTION GEN FUNCTION SwIT TO 600 ACTLY 1 6 V rms CONNECT ito PROBE CU PUT OF FUNCTION GEN ERATOR MM 105 METER REMOVE LOAD RE SISTANCE AND DIGITAL VOLT METER FROM FUNC TION GENERATOR WITCH 100 PROBE OUTPUT OF FUNCTION GENERATOR READ 100 METER REMOVE MM 00 FROM OUTPUT OF FUNCT ION SLNERATOR M 7 OUTPUT P OF FUNCTION GEN n ERATOR ACROSS 150 25 LOAD 170 V ems RESISTANCE L YES Figure 5 12 100 multimeter troubleshooting sheet 7 of 10 5 108 m REMOVE MM 100 PHOBE FROM OUT PUT FUNCTION GENERATOR CONNECT OUTPUT OF FUNCTION GEN ERATOR ACROSS AN IR 5 LOAD R SISTANCE CONNECT OIGITAL VOLTMETER ACROSS LOAD RESISTANCE ADJUST OUTPUT OF FUNCTION ERATOR TO REMOVE LOAD RESISTANCE AND DIGITAL VOLT METER FROM FUN CTION GENERATOR SET 100 FUNZTION 5 TO 8 Figure 5 12 Lis ro 100 P PROBE OUT um E j dre FUNCTION 7 36 pes NERA ar fee D 100 i N we vi Pd N SH 10 150 N LG qu TO gt 16 EM 170Vrms 2 Li E MOVE
202. NOTE To apply power to the AN GRM 114 refer to the instruc tions in paragraph 4 3 1 Set controls for receive operation AM or FM as listed in table 4 9 2 Apply power to UUT 3 Connect coax cable between UUT RF output and AN GRM 114 TRANS RCVR connector TRANS RCVR AN GRM 114 TRANS 4 58 TM11 6625 3016 14 Table 4 17 Power Monitor Operating Instructions for Measuring Transmitter Carrier Power Continued Illustration Step Procedure 4 Rotate DEV PWR control to WATTS x 10 NOTE Due to various construction of buildings a national standard e g signal may not be obtained without a rooftop an tenna or relocation of AN GRM 114 to an outdoor location DEV PWR 5 Key up UUT Read UUT power output on red scale of DEVIATION KHz WATTS meter NOTE If DEVIATION KHz jwATTS meter needle deflection is less than 10 watts when UUT is keyed rotate DEV PWR con trol to WATTS x 1 DEVIATION KHz WATTS 4 59 TM11 6625 3016 14 Table 4 17 Power Monitor Operating Instructions for Measuring Transmitter Carrier Power Continued Step Procedure Illustration 6 Set FRE QUENCY MHz thumbwheels to frequency of transmitter 7 Set ANALY DISPR control cw just short of detent NOTE UUT power output can also be viewed on spectrum analy zer dB scale using following approximate equivalences 30 dB marking on spectrum analyzer 100 watts
203. O PRIATE PIN OF 26 4 REFER TO TABLE 58 11 V dc SWITCHING VOLTAGE AT AP PROPRIATE Pi OF P4 NC SH 15 YES PROBLEM INDICAT ED WITH HIGH FREQ MULT MIXER TURN POWER OFF RE PLACE A1A26 TURN POWER ON MEASURE SIGNAL A1A24A1J1 WITH SA PROBLEM INDICAT ED WITH 100 MHz MULT 108 MIXER TURN POWER OFF REPLACE 24 TURN POWER ON 10 MHz dBm TO 10 dBm AT A1A24 121 YES NO SH 15 Figure 5 8 RF signal generator troubleshooting sheet 14 of 19 5 85 TM 11 6625 3016 14 i 1 pee REE AMAT M Ta ew M INDICA T ED WITH V C C TUNER BD TURN POWER OFF RE PLACE TURN POWER ON Figure 5 8 5 86 INDICAT EO WITH FREQ SELECT SWITCH TURN POWER OFF REPLACE 27 TURN POWER ON A MEASURE SIGNAL AT A1A3A5 1 WITH SA PROBLEM NDICAT ED WITH MASTER OSCILLATOR PUT DISTRIBU TION AMPLIFIER TURN POWER OFF A1A355 TURN POWER ON 10 MHz 5 dim TO 5 AT A1A3 PROBLEM INDICAT ED WITH MASTER OSCILLATOR TURN POWER OFF REPLACE 1 TUKN POWER ON RF signal generator troubleshooting sheet 15 of 19 TM 11 6625 3016 14 Pd
204. OFF fully ccw in detent Midrange 5 FM OFF Fully ccw RCVR Fully ccw not in detent SIG RCVR NARROW 10gV NORM AUTO PWR 111 100 0 5 71 TM 11 6625 3016 14 PRESET il 114 CONTAC i L 5 Fe HANGE GEN SWITCH FO GEN QU X 100 MEASURE SIGNAL AT TRANS RCYR CONNECTOR WITH SA is 111 1 mHz 37 5 42 5 dBm MEASURE 1199 9 MHz SIGNAL AT A1A20J4 WITH SA 5 72 MEASURE VOLTAGE AT A1A28FL3 WITH VOLTMETER MEASURE VOLTAGE A1A28FL1 WITH VOLTMFTER 4 V dc TO 11 V dc AT 2 32 DOES INDICATORS LAMP TURN ON PROBLEM I DICATED WITH 0 dBm INDICATOR LAMP CHECK BULB WIRING REPAIR REPLACE AS NECESSARY MEASURE 111 1 Miz T TRANS REYR CONNEC TOR WITH SA IT 3 dBm TO 3 dBm SET LEVEL BFO NJECTION DIAL 80 dBm SET RF LEVEL INJECTION DIAL TO 80 dBm MEASURE 111 1 MHz A1A1935 WITH SA SH 3 Figure 5 8 RF signal generator troubleshooting sheet 1 of 19 15 12 V TO 12 3 V dc AT YES PROBLEM IS IN DICATED WITH RELAY DRIVER CKT D A1A25 REPLACE RELAY DRIVER CKT BD A1A25 Figure 5 8 RF signal generator troubleshooting sheet 2 of 19 RETURN RE LEVEL BFO IN JECT
205. ORRECTED PROBLEM INDICAT ED WITH A G C ASSY TURN POW ER OFF REPLACE TURN POWER ON RETURN TO 52 THEN TO 24 SH 9 WHEN PROBLEM IS CORRECTED RETURN A G C TO CIRCUIT CON 1 TO A1A3A3J1 AND 2 1 TO A1A3A2J1 CHECK 1ST L O THROUGH OUT RANGE RE TURN TO 24 SH 9 WHEN COMPLETE TM 11 6625 3016 14 START NO YES CHECK 11 V dc UNPLUG LINE AT A1A1231 PIN CORD FROM 13 DUAL SH 2 AC OUTLET GEN ASSY SEE FIG 5 26 REFER TO DISASSEMBLY 10 95 ASSEMBLY IN TO NO STRUCTIONS TO 11 05 V dc REMOVE CASE FROM UNIT YES CHECK 45 V dc AT NOM dede ablic A1A12J1 PIN 14 ON NE CASE FROM DUAL TONE GEN 480 PLUG LINE TO NO INTO AC OUTLET 45 25 V dc YES 5 3 CHECK 12 V dc AT A1A12J1 PIN 12 Figure 5 9 Dual tone generator troubleshooting sheet 1 of 3 5 91 TM 11 6625 3016 14 POWER sues APPEAR TO BE WORKING PROP ERLY TURN 1 KHz INI MOD CONTROL FULLY cow TO OFF UENCY COUNTER TO INT MOD QUT 1 FREQUENCY COUNT ER MUST READ FROM 999 9 Hz TO 1000 1 Hz DOES IT VARIABLE FREQ j TURN INT M CONTROL Cw ET MODULATION REQ SWITCHES TO 1000 0 Hz _ MEASURE OUTPL LEVEL WITH TONE GENERATOR OSCILLOSCOPE AT APPEA
206. OTE lists the initial adjustments and control settings To applv power to the AN GRM figure 4 4 necessary to receive signals Table 4 10 AC 114 refer to the instructions in lists the operating instructions paragraph 4 3 Figure 4 4 Receiver controls indicators and connectors 4 28 12 13 Step Procedure Table 4 9 Initial Adjustments and Control Settings Reference No Control indicator or connector RF LEVEL BFO INJECTION dial AUTO OFF ZERO BATT switch RCVR WIDE MID NARROW switch GEN RCVR switch SQUELCH OFF control INT MOD RCVR switch VOL control BFO OFF switch AM FM switch INT MOD OFF control 1 KHz INT MOD OFF control 1 5 5 15 KHz control DEV PWR control Table 4 10 Receiver Operating Instructions Do not connect a transmitter to the ANT INPUT connec tor Connect only an external antenna to the ANT INPUT connector Do not exceed 200 V peak to peak into the SCOPE IN connector NOTE Remove any static discharge from an unterminated antenna before connecting it to the AN GRM 114 TM 11 6625 3016 14 Initial adjustment or setting Fully ccw AUTO WIDE RCVR Fully ccw short of detent RCVR Fully ccw OFF AM or FM depending on mode of signal to be received Fully ccw detent OFF Fully ccw detent OFF 15 KHz SIG 4 29 TM 11 6625 3016 14 step Table 4 10 Receiver Operating Procedure Maximum continuous input to this
207. OWER OFF RE PLACE A1A11 TURN POWER ON Z NO DOES IT CHANGE FREQ SE LECT SWITCH TO 200 000 0 USE EX TERNAL D C TO VARY ABOVE AND BELOW 1400 MHz VOLTAGE AT A1A11J4 SHOULD DECREASE TO 25 V DC TO35 V DC AS DE CREASES TO 1300 MHz VOLTAGE AT A1A114J4 SHOULD INCREASE TO 3 v DC TO4V DC AS F yco IN CREASES TO 1400 MHz DOES IT PROBLEM INDICAT ED V C O TUNER BD TURN POWER OFF REPLACE A1A11 TURN POW ER ON DOES IT PROBLEM iNDICAT ED WITH V C O TUNER BD TURN POWER OFF RE PLACE A1A11 TURN POWER ON Figure 5 5 Receiver troubleshooting sheet 10 of 14 TM 11 6625 3016 14 SH 11 5 53 TM 11 6625 3016 14 VOLTAGE AT A1A11J4 SHOULD DECREASE TO 1 V DC TO2 v DC AS DECREASES TO 1400 MHz YES DOES IT PROBLEM INDICAT ED WITH V C O TUNER BD TURN POWER OFF RE PLACE 11 TUR POWER ON MONITOR A1A11J3 WITH OSCILLO SCOPE IS VOLTAGE YES AT A1A11J3 PROPER NO PROBLEM INDICAT ED WITH V C O TUNER BD TURN POWER OFF RE PLACE A1A11 TURN POWER ON BYPASS A G C CON A1A3A3P1 TO 2 1 IS FAULT CONDITION PRESENT YES PERFORM V C O TUNER ALIGN MENT REFER TO ALIGNMENT PROCEDURES YES PROBLEM INDICAT ED WITH 1200 2200 MHz OSCILLATOR TURN POWER OFF REPLA
208. P uv T EH 2 REFERENCE Figure 6 18 79 80 MHz loop A1A10 diagram sheet 1 of 2 6 43 6 44 blank P 9 22502 SH 0 5 gt 400 4 gt 200 aM 6 gt 100 5 gt 7 gt 40 20 10 Wiz 1 gt 4 gt 2 4 gt gt SHH B D SH n He 5 gt 400 mie gt 200 82 100 17 SH 13 x7 7413130 b COUNTER 9 745190 COUNTER ALSO C RD BCD COUNTER COUNTER COUNTER Figure 6 18 TM11 6625 3016 14 J 79 80 LOOR PC ASS 400 79 80 MHz loop A1A10 schematic diagram sheet 2 of 2 6 45 6 46 blank NOTES Lj 5 DRAFTSMAN NOTES LAST REF NO USED ON SHT Eid MANORS AIANDI AIRES AIAUXI ALL RESISTORS ARE 1 8 10 UNLESS OTHERWISE NOTED ALL RESISTANCE 18 EXPRESSED IN OHMS UNLESS OTHERWISE NOTED ALL CAPAC TANCE 18 EXPRESSED IN PICOFARADS UNLESS OTHERWISE NOTED ALL REF NO S CARRY AN ASSIGNED DESIGNATOR SERIES e g THIS SCHEMATIC CARRIES SERIES THEREFORE RI IS DESIGNATED 32602 P FREQ PART P260
209. PWR OFF BATT Switch is depressed to the mom entary BATT position This sends a signal to the Regulator and Power Supply Circuit Board figurel which energizes the Duty Cycle Regulator relay allowing battery voltage to be presented to the Duty Cycle Regulator circuits To remove battery power the PWR OFF BATT Switch is again depressed to the momentary battery posi tion b The Duty Cycle Regulator develops 5 412 and 39 V dc regulated outputs from the source voltage The 5 V dc output is used in logic circuits The 12 V dc output is fed to the Oscillo scope Main Circuit Board and the Regulator and Power Supply Circuit Board The 39 V dc output is fed to the Regulator and Power Supply Circuit Board The Duty Cycle Regulator also provides a battery charging circuit This circuit which provides 15 V dc operates only on an external voltage c The Regulator and Power Supply Cir cuit Board receives inputs from the Duty Cycle Regulator The Circuit Board develops 11 12 and 35 V dc outputs for operation of cir cuit boards and mechanical assemblies These vol tages are current limited to prevent damage to the regulator circuits The Circuit Board also con tains a battery timer circuit which turns the test set off after six to ten minutes of battery opera tion and a low voltage cutoff circuit which pre vents battery operation of the test set when the battery voltage is below 11 volts The Circuit Board converts RF siq
210. RD IS POWER SUPPLY BAD BOARD POWER SUPPLIES APPEAR TO BE WORKING LY USING AC LINE POWER MONITOR 39 V dc LINE A1A14J1 PIN 7 REMOVE A1A14 SET PWR OFF BOARD AND PUT BATI SWITCH TO IN A GOOD ONE PWR NOTE VOLT METER READING DISCHARGE FIL TER CAPACITORS RETURN TO START ON SHEET 1 MONITOR 12 V dc LINE AT A1A14J1 PIN 15 WITH VOLTMETER UNSOLDER WIRE AT A1A2J2 PIN 20 THAT COMES FROM A1A14J1 PIN 15 Figure 5 3 Power supply troubleshooting sheet 6 of 16 IS 12 0 TO 125 A1A14J1 PIN E NO YES SET PWR OFF IS MONI OR 11 V dc SET PWR QEF BATT TO OFF 11 0 V dc LINE AT A1A14J1 BAIT SWITCH TO UNPLUG POWER AT A1A14J1 PIN 5 WITH OFF CORD FROM AC PIN 5 VOLTMETER DISCHARGE FIL TER CAPACITORS UNSOLDER WIRE AT A1A2J3 PIN 30 THAT COMES FROM A1A14J1 PIN 5 PROBLEM WITH WIRING CONNEC TIONS FROM A1A2P2 TO A1A14J1 PIN E OUTLET DISCHARGE FIL TER CAPACITORS USE OHMMETER TO ISOLATE PRO BLEM REPAIR OR REPLACE AS NECESSARY ADJUST A1A14R24 TO GET 11 V dc AT A1A14J1 PINS A1A14 REGULA TOR POWER SUPPLY BOARD IS BAD TN 11 6625 3016 14 S UDER WIRE A1A2J3 PIN 30 DISCONNECT ONE ASSEMBLY FROM 11 V dc LINE RE FER TO MOTHER BOARD INTERCON NECT DIAGRAM REMOVE
211. RM switch is in the HI LVL position power is ap plied to the High Level Amplifier iure 6 42 The signal path up to the 1st Mixer is the same as for generate operation refer to paragraph 3 3a The 1st Mixer relays energize and the signal goes from the 1st Mixer circuit to the High Level Amplifier Amplified output is sent back to theist Mixer Assembly and through the relays It then follows the path through the Power Monitor relays the 20 dB pad and the Transmitter Sensor to the TRANS RCVR connector as in generate operation refer to paragraph 3 3a c The beat frequency oscillator BFO is active only when the GEN RCVR switch is in the 3 6 RCVR position When the BFO OFF switch is in the BFO position the FM AM generator generates a 120 MHz signal The signal is applied to the 2nd Mixer through the variable attenuator RF LEVEL BFO INJECTION If the HI LVL uV x 100 NORM switch is in the NORM position the 40 dB pad in the 2nd Mixer is selected It is bypassed if the switch is in the UV x 100 position The coupling mixes the generated signal with the re ceived signal The signal then follows the path out of the 2nd Mixer described in 3 4 Frequency Error Theory Refer to figure 3 a block diagram a The AUTO OFF ZERO BATT switch must be in the AUO ZERO position upper posi tion in order for Frequency Error Measurements to be taken When it is in the AUTO ZERO posi tion errors caused by dri
212. RS TO WORK INT MOD OUT JACK NORMALLY TURN INT MOD CONTROL FULLY TO Figure 5 9 Dual tone generator troubleshooting sheet 2 of 3 5 92 UAL GEN RATOR IS BAD DISASS EMBLY ASSEMBLY INSTRUCTIONS REMOVE DUAL GENERATOR p u INSTALL A GOOD DUAL TONE GEN ERATOR A1A12 ASSEMEI Y pe sss ser PWIVOFF BATT SW TCH TO PWR C CAREFULLY PUT CASE ON UNIT REFER TO FIGURE 5 2 AN GRM 114 TEST PROCEDURE r MEASURE PUT LEVEL WITH OSCILLOSCOPE AT INT MOD out JACK A SET PWH OFF BAT SWITCH TO OFF E REFER TO DISASS EMBLY ASSEMSLY INSTRUCTIONS TO REMOVE DUAL TOME GENERATOR DUAL GENERATOR 15 BAD i lt NLT No 5 0 Vp p CONNECT A FREQ UENCY COUNTER T INT MOD OUT JACK DUAL TONE GEN ERATOR A1412 ASSEMBLY INSTALL 6090 FREQUENCY COUN TER MUST READ FROM 980 TO 1020 Hz Figure 5 9 Dual tone generator troubleshooting sheet 3 of 3 YES i KHz GEN ERATOR APPEARS TO WORK NORM i ALLY DUAL GEN ERATOR ASSEMB LY APPEARS TC WORK Rie 1 L ee PWR CEF BATT SWITCH T OFF Poo
213. RUCTION POWER PROVIDES A SECOND STEP ON LAMP FOR REPAIR IN CASE THE 1ST METHOD FAILS ALWAYS DO STEP 1 FIRST IF STEP 1 YES REPAIRS THE FAULT YOU WILL NOT RETURN TO THIS IN STRUCTION AGAIN IF YOU RE TURN TO THIS INSTRUCTION THE 2ND TIME DO STEP 2 STEP PERFORM NUMBER IS INDICATED BY AFTER ALL 2 REPLACE A3 NUMBER ABOVE THE ARROW EQUIPMENT GOING TO THE TEST PRO CEDURE INSTRUCTION PERFORM FAILURE ns CHECK FIGURE 5 5 REPAIRS LM PROVIDES AODITIONAL INFORMATION FOR THE SYMBOL TO NO 15 DATA LAMP LIT YES SH 2 WHICH IT IS CONNECTED BY DASHED LINE DOES NOT CONTAIN ADDITIONAL INSTRUCTIONS SH 2 CONNECTOR DIRECTS USER TO FLOW LINE ENTRY POINT IDENTIFIED BY THE SAME NUMBER CONNECTORS ARE NUMBERED SEQUENTIALLY THROUGH ONE ILLUSTRATION IN THE ORDER OF THEIR ENTRIES tNTO THE FLOW LINES WHEN EXIT CONNECTOR HAS AN ADJACENT SHEET NUMBER THE MATING ENTRY CONNECTOR APPEARS ON THE SHEET SPECIFIED OTHERWISE THE MATING ENTRY CONNECTOR APPEARS ON THE SAME SHEET ALL EXIT CONNECTORS ARE NUMBERED AS THEIR CORRESPONDING ENTRY CONNECTOR Figure 5 1 Flowchart symbol application TM 11 6625 3016 14 START AN GRM 114 TEST PROCEDURE PRESET AN GRM 114 CONTROLS PER TABLE 5 3 NO 53 LOCK NO LAMPS ARE LIT YES CONNECT COAX CABLE FROM OUT PUT OF RF SIG GEN TO ANT IN PUT JACK OF AN GRM 114 Figure PERFORM FOL LOWING ALL EQUIPMENT REPAIRS
214. RUCTIONS Operating procedures AN GRM 114 controls indicators and connectors Operating procedures signal generator operating instructions Oscilloscope operating instructions Receiver operating instructions Spectrum analyzer operating instructions Audio generator operating instructions Power monitor function Master oscillator calibration Frequency error measurement Audio frequency monitor function Multimeter operating instructions MAINTENANCE INSTRUCTIONS General AN GRM 114 routine maintenance checks and services Tools and test equipment Glossary AN GRM 114 performance test AN GRM 114 troubleshooting AN GRM 114 alignment and adjustments Component location diagrams Inspection Performance verification Disassembly instructions Reassembly instructions NIX ABE NI IDJ 1 m gt ABE NI OI PSIE loo NIN E Paragraph ko IN iO N E k D E 1 ICO 91 TU Q No mir Ja p col ER ER En sels Km KR PN P4 09 IN CO
215. S LOCAL CSCILLA 1200 MHz DIODE SWITCH A1A16 15 BAD SET PwR SWITCH MEASURE SIGNAL AT 1 1633 WITH SA 11999 MHz 22 dB 27 48 gt A1A16J2 REPLACE A1A16 SET PWR OFE BATT SWITCH TO PWR 1200 MHz AMPLI FIER A1A6 15 BAD SET PWR OFF BATT SWITCH r REPLACE A1A6 SET PWR OFF BATT SWITCH TO PWR Figure 5 8 RF signal generator troubleshooting sheet 9 of 19 RIGHT LOW FREQ YES LOCK LAMP ON NO MEASURE SIGNAL AT A1A20J5 WITH SA FL 3 dBm TO 10 dBm AT A1A20J5 2ND LOCAL OSCIL LATOR APPEARS TO BE WORKING PROPERLY AT THIS FREQUENCY MEASURE SIGNAL AT A1A541 WITH SA MEASURE SIGNAL AT A1A5J2 WITH SA FLO dBm YES 45 5 dBm AT 145222 PROBLEM INDICAT ED WITH 108 MHz BANDPASS FILTER POWER OFF REPLACE ATAS TURN POWER ON TM 11 6625 3016 14 SH 11 PROBLEM IS INDI CATED WITH 1080 MHz AMPL TURN POWER OFF RE PLACE 1 15 TURN POWER ON Figure 5 8 RF signal generator troubleshooting sheet 10 of 19 5 81 TM 11 6625 3016 14 MEASURE SIGNAL AT A1A10J1 WITH OSCILLOSCOPE PROBLEM INDICAT ED WITH 109 MHz AMPL 108 MIXEF TURN POWER OFF RE PLACE AiA15 5 82 MEASURE SIGNAL AT A1A10J1 WITH OSCILLO SCOPE MEASURE SIGNAL AT A1A10P2 2 WITH O
216. S FUSE IN SET PWR QEF BATT SWITCH TO OFF PUT IN A GOOD 7 1 2A FUSE Figure 5 3 Power supply troubleshooting sheet 15 of 16 DISCONNECT POWER CABLE FROM DC POWER SOURCE TM 11 6625 3016 14 REFER TO DIS ASSEMBLY ASSEM BLY INSTRUCTIONS TO REMOVE CASE CAREFULLY RE MOVE CASE FROM UNIT YOU WILL NOW CHECK UNIT ON EXTERNAL DC POWER ALL RE FERENCES TO AC SHALL MEAN DC FOR EXAMPLE AC LINE CORD SHALL MEAN DC POWER CABLE AC OUT LET SHALL MEAN DC POWER SOURCE SH2 5 35 TM 11 6625 3016 14 MONITOR 5 12 SET PWR OFF OPEN AND 39 V dc CIRCUIT LINES AT BAT ESWITCH A1A2J2 WITH T PWR ON REPA SET PWR REPAIR WIRING AS REFER TO INTER OR REPLACE NECESSARY CONNECT ASSEMBLY AS DIAGRAMS NECESSARY REMOVE WIRES ONE TIME FROM A1A2J2 MONITOR VOL TAGE AT J2 WITH PWR ON REPEAT STEP ABOVE TO ISO LATE PROBLEM TO WIRING OR ASSEMBLY Figure 5 3 Power supply troubleshooting sheet 16 of 16 5 36 START PRESET AN GRM 114 CONTROLS PER TABLE 5 3 CONNECT COAX CABLE FROM OUT PUT OF RF SIG GEN TO ANT INPUT JACK OF AN GRM 114 SET SIG GEN TO 111 0 MHz 3096 AM MODULATION 1 KHz SET OUT PUT LEVEL TO 40 dBm ABOUT 2200 HV SET AN GRM 114 PWR OFF BATT SWITCH TO PWR SET AN GRM 114 VOL CONTROL FOR A COMFORT
217. SCILLO SCOPE 100 Hz 3 Vp p TOS Vpp YES AT A1A10 P2 2 NO SH 12 MEASURE SIGNAL AT A1A10P2 21 WITH VOLT METER 0 V dc TO 2 AT 1 10 2 21 YES PROBLEM INDICAT ED WITH INDICA TOR LAMP CHECK BULB WIRING RE PAIR REPLACE AS NECESSARY SWITCH INPUTS AT YES PROBLEM INDICAT ED WITH FREQ SE LECT SWITCH URN POWER OFF REPLACE A1A27 URN POWER ON Figure 5 8 RF signal generator troubleshooting sheet 11 of 19 PROBLEM ED WITH 79 80 MHz LOOP P C BD TURN POWER OFF REPLACE 1 10 TURN POWER ON PROBLEM INDICAT ED WITH 79 80 MHz LOOP P C BD TURN POWER OFF REPLACE 1 10 TURN POWER ON MEASURE SIGNAL AT A1A3A5J2 WITH SA YES PROBLEM INDICAT ED WITH CLOCK DIVIDER TURN POWER OFF RE PLACE 4 TURN POWER 32 MEASURE SIGNAL AT A1A3A5J WITH SA PROBLEM INDICAT ED WITH MASTER OSCILLATOR OUT PUT DISTRIBUTION AMPL TURN POW ER OFF REPLACE A1A3A5 TURN POWER ON RETURN TO 33 THEN TO 18 SH 7 WHEN PROBLEM 15 CORRECTED TM 11 6625 3016 14 PROBLEM INDICAT ED WITH MASTER OSCILLATOR TURN POWER OFF REPLACE A1A3U1 TURN POWER ON RETURN TO 33 THEN 18 SH 7 WHEN PROBLEM 15 Figure 5 8 RF signal generator troubleshooting sheet 12 of 19 5 83 TM 11 6625 3016 14 iS LEFT NO HIGH FREO YES MEASURE SIGNAL
218. SE NOTED 3 ALL RESISTANCE IS EXPRESSED IN CHMS UNLESS OTHERWISE NOTED 4 ALL CAPACITANOE 18 EXPRESSED IN PICOFARADS UNLESS OTHERWISE NOTED 5 ALL REF NO S CARRY AN ASSIGNED DESIGNATOR SERIES e g THIS SCHEMATIC CARRIES SERIES amp AIAISAIAIS THEREFORE 8 DESIGNATED AIAIBAIAIRID DRAFTSMAN NOTE ON SHT J3G0 BECOMES 43802 33808 AIAIBAIUS J3804 FL3608 11 6625 3016 14 Re 5800 R28 5600 Q9 Pa yas 3900 SPECT ANALY aser 7010 2359 300 1 3800 ANALY ASSY 7030 2383 200 1 ee ppc s tte Wg ae Gy MD D Wr FL3606 20 066 t 1 1 1 1 1 1 1 1 1 25 MHz MHz le Mw al n 3802 FILTER IF OUT 1 1 Adu n n I 120 1 n n n 1 it i P T il Lig Hu 1 1 1 ces 38 e 3 5 5 618 5 il M 43803 LO FREQ 9 Lo our il mi 150 150 I z ii 66362 0 600 0 l 1 1 1 1 1 1 n 380 Lis 22 pA Rp wl 637 Ful 4 160 5 148 100 Tis n i BR BR oO LOCK BL BU ZWT BU WT RA DISP iN a Li i CE ir Disp OUT ay
219. SNE 1 121440 vic aod ANAY JO 430 Qivda 334 19V160O4 xove 0704 30 6 714 TEAR ALONG PERFORATED LINE 20202 i03 VO 30 2553438 TEAR ALONG PERFORATED LINE n K M ee lt ue me RECOMMENDED CHANGES TO EQUIPMENT TECHNICAL PUBLICATIONS SOMETUINE WRONG FROM PRINT YOUR UNIT S COMPLETE ADDRESS THEN JOT DOWN THE DOPE ABOUT IT ON THIS FORM CAREFULLY TEAR IT OUT FOLD IT AND DROP IT IN THE MAIL DATE SENT PUBLICATION DATE PUBLICATION TITLE Test Set Radio AN GRM 114 IN THIS SPACE TELL WHAT 15 WRONG AND WHAT SHOULD BE DONE ABOUT IT PUBLICATION NUMBER TM 11 6625 3016 14 EXACT PIN POINT WHERE ITIS EXACT PIN POINT WHERE ITIS PIN POINT WHERE IT IS 5 PARA FIGURE TABLE GRAPH NO NO PRINTED NAME GRADE OR TITLE AND TELEPHONE NUMBER SIGN HERE DA FORM 2028 2 PREVIOUS EDITIONS P S IF YOUR OUTFIT WANTS TO KNOW ABOUT YOUR Jut 79 ARE OBSOLETE RECOMMENDATION MAKE A CARBON COPY OF THIS AND GIVE IT TO YOUR HEADQUARTERS REVERSE OF FORM 2028 2 FILL IN YOUR UNIT ADDRESS POLD BACK DEPARTMENT OF THE ARMY POSTAGE AND FEES PAID DEPARTMENT OF THE ARMY DOD 34 OFFICIAL BUSINESS PENALTY FOR
220. TM 11 6625 3016 14 TECHNICAL MANUAL 5 ORGANIZATIONAL DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL TEST SET RADIO AN GRM 114 NSN 6625 01 108 6206 HEADQUARTERS DEPARTMENT OF THE ARMY JUNE 1982 Operator and maintenance personnel should be familiar with the requirements of TB 385 4 before attempting installation or operation of the equipment Failure to follow the require ments of TB 385 4 could result in injury or DEATH DON T TAKE CHANCES DANGEROUS RF VOLTAGES UP TO 2 000 V MAY EXIST WITHIN THE AN GRM 114 WHILE THE UNIT 15 OPERATING AVOID RADIO FREQUENCY BURNS TM 11 6625 3016 14 SAFETY STEPS TO FOLLOW IF SOMEONE IG THE VICTIM OF ELECTRICAL SHOCK DO NOT TRY TO PULL OR GRAB THE INDI VIDUAL IF POSSIBLE TURN OFF THE ELECTRICAL POWER IF YOU CANNOT TURN OFF THE ELECTRICAL PULL PUSH OR LIFT THE PERSON TO SAFETY USING A WOODEN POLE OR A ROPE OR SOME OTHER INSULATING MATERIAL SEND FOR HELP AS SOON AS POSSIBLE AFTER THE INJURED PERSON IS FREE OF CON TACT WITH THE SOURCE OF ELECTRICAL SHOCK MOVE THE PERSON A SHORT DISTANCE AWAY AND IMMEDIATELY START ARTIFICIAL RESUSCITATION TM 11 6625 3016 14 CAUTION THIS EQUIPMENT CONTAINS PARTS AND ASSEMBLIES SENSITIVE TO BY ELECTROSTATIC DISCHARGE 50 USE ESD PRECAUTIONARY PROCEDURES WHEN TOUCHING REMOVING OR INSERTING PRINTED CIRCUIT BOARDS ESD CLASS 1 GENERAL HANDLING PROCEDURES
221. TPUT VOLTAGES TEST POINTS ARE GIVEN IN TABLE 2 ARE VOLTAGES PROPER YES POWER SUPPLIES APPEAR TO BE WORKING PROPER NO LY USING AC LINE POWER Figure 5 3 Power Supply troubleshooting sheet 2 of 16 5 22 TROUBLE ASSO YES CIATED WITH A1A8 REAR PANEL ASSEMBLY SET PWR QEF BATT SWITCH TO OFF NO REFER TO DIS ASSEMBLY ASSEM BLY INSTRUCTIONS TO REMOVE DUTY CYCLE REGULAT TOR ASSY SET PWR QEE BATT SWITCH TO OFF CAREFULLY RE MOVE FROM REAR PANEL DIS CONNECT A1A2P1 A1A2P2 2 AND A1ABA1P1 OPEN ckt ASSOCI ATED WITH PWR OFF BATT SWITCH OR RELATED WIRING CONNECT 2 A1A8J2 REPLACE FUSE SET PWR QEF BATT SWITCH TO PWR SET PWR QEF BATT SWITCH TO R 15 20 IS 20 TO 25 V YES TO 25 V de NC AT A1A8F2 PIN 3 NO YES TROUBLE ASSO SET PWR QFE CIATED WITH A1A8 CONNECT 12 TO A1A8A1J12 SWITCH TO REAR PANEL ASSEMBLY Figure 5 3 Power supply troubleshooting sheet 3 of 16 TM 11 6625 3016 14 SHORT ckt ASSOCIA TED WITH PWB QFF BATT SWITCH OR RELATED WIRING DISCHARGE FILTER CAPACITORS LO CATE PROBLEM WITH OHMMETER REPAIR OR RE PLACE AS NECES SARY RETURN TO START ON 1 _ 5 23 TM 11 6625 3016 14 CHECK DUTY CY CLE REGULATOR OUTPUT
222. This signal is fed to the discriminator and the Frequency Error Meter Driver Circuit on the 250 kHz I F Monitor Audio Circuit Board During the AUTO ZERO pulse the output of the Frequency Error TM 11 6625 3016 14 AUTO ZERO OSCILLATOR COMPARATOR DISCRIMINATOR AUDIO FILTER 120 MHz RECEIVER 250 kHz IF MONITOR BOARD FM AUDIO OUT FREQUENCY ERROR METER Figure 3 4 Frequency error block diagram 3 7 TM 11 6625 3016 14 Meter Driver Circuit is fed to a comparator The output of the comparator sums with the output of the discriminator This sum signal zeroes the Fre quency Error Meter Driver output of the compara tor and the FREQ ERROR KHz meter After the AUTO ZERO pulse there is a 0 5 ms delay until the meter circuits are activated This gives the system time to reestablish the original signal 3 5 1st Local Oscillator Theory Refer td figure 3 5 for a block diagram The TCXO applies a 10 MHz signal to the 100 MHz Amplifier 108 MHz Mixer through the TCXO Output Distribution Ampli fier figure 6 10 The 100 MHz Amplifier 108 MHz Mixer selects the fifth harmonic of 10 MHz amplifies it and multiplies the 50 MHz signal by two The resulting 100 MHz signal is amplified and applied to the 100 MHz Filter figure 6 34 The 100 MHz signal is then applied to the High Frequency Multiplier Mixer figure 6 40 where it is amplified then applied to th
223. URN POWER ON Figure 5 8 RF signal generator troubleshooting sheet 18 of 19 PROBLEM INDICAT ED WITH v C O TUNER BD TURN POWER OFF RE PLACE A1A11 TURN POWER ON CHANGE FREQ MHz SWITCH TO 200 000 0 USE EXTERNAL D C TO VARY F vco ABOVE AND BELOW 1400 z VOLTAGE AT A1A11J4 SHOULD INCREASE TO 3 V dc TO 4 V dc AS F vco INCREASES TO 1400 MHz PROBLEM INDICAT ED WITH V C O TUNER BD TURN POWER OFF RE PLACE 11 TURN POWER ON TM 11 6625 3016 14 SH 19 5 89 TM 11 6625 3016 14 A1A11J4 SHOULD DECREASE TO 1 V dc TO2 V dc AS F yco DE CREASES TO 1400 YES NO PROBLEM INDICAT ED WITH V C O TUNER BD TURN POWER OFF RE PLACE A1A11 TURN POWER ON Figure 5 8 RF signal generator troubleshooting sheet 19 of 19 5 90 MONITOR A1A11J3 WITH OSCILLO SCOPE iS VOLTAGE AT A1A11J3 PROPER YES NO PROBLEM INDICAT ED WITH V C O TUNER BD TURN POWER OFF RE PLACE A1A11 TURN POWER ON BYPASS A G C NECT A1A3A3P1 2 1 IS FAULT CONDITION PRESENT NO YES PERFORM V C O TUNER ALIGN MENT REFER TO ALIGNMENT PRO CEDURES V C O TUNER ALIGNMENT UCCESSFU YES NO PROBLEM INDICAT ED WITH 1200 2200 MHz OSCILLATOR TURN POWER OFF REPLACE 2 TURN POWER ON RETURN TO 53 THEN TO 24 SH 9 WHEN PROBLEM IS C
224. WER SOURCE POWER SOURCE MUST BE ABLE TO SUPPLY 10 AMPS OF CURRENT OB SERVE POLARITY 5 29 TM 11 6625 3016 14 22 VOLTMETER SHOULD READ 13 TO 16 V dc CHARGER VOLT AGE IS READING CORRECT NO YES BATTERY CHARG ER ckt APPEARS TO BE WORKING PROPERLY HOLD DOWN ZERO BATT CHARGER VOLT AGE SCALE OF DEVN METER IS READING CORRECT NO YES BATTERY MONI TOR ckts APPEAR TO BE WORKING PROPERLY SH 12 5 30 SET PWR OFF BATT SWITCH TO OFF UNPLUG CINE CORD FROM AC OUTLET REFER DIS ASSEMBLY ASSEM BLY INSTRUCTIONS TO REMOVE 1 DUTY CY CLE REGULATOR ASSY REMOVE ASSY FROM REAR PANEL LEAVE ATA8A1P1 CON NECTED REMOVE A1A14 POWER SUPPLY REGULATOR BOARD PLUG LINE CORD INTO AC OUTLET SET PWR QFF SWITCH TO B SH 11 Figure 5 3 Power supply troubleshooting sheet 10 of 16 IS 13 TO 16 V dc AT ATABATFL5 YES NO SET PWR QFF BATT SWITCH TO OFF DISCONNECT 1 1 MONI TOR PIN 1 OF P1 WITH VOLT METER IS 20 TO 25 dc PIN 1 YES NO PROBLEM WITH WIRING FROM A1A8TB 1 TO A1A8A1P1 SH 12 PROBLEM WITH WIRING OR CON NECTIONS FROM ATABAIFLS TO A1A8 REAR PANEL SET PWR OFF BATT SWITCH TO OFF UNPLUG LINE CORD FROM AC OUT
225. WITCH FROM Figure 3 7 Dual tone generator block diagram 3 11 TM 11 6625 3016 14 a The INT MOD OFF control applies power 5 V dc to the variable tone circuits The MODULATION FREQ Hz thumbwheels control the frequency which is digitally selected and cry stal controlled The ouput of a 10 24 MHz cry stal oscillator is applied to bit rate multipliers which are controlled by the setting of the MOD ULATION FREQ Hz thumbwheels The output of the bit rate multipliers is summed If it is greater than 1 kHz it is sent to a 10 counter then to a Read Only Memory ROM If it is less than 1 kHz it is sent directly to the ROM It is then applied to a Digital Analog D A converter where it is converted to a frequency based on out put from the ROM The output signal from the D A converter is filtered and ac coupled into a sine wave This signal is applied to the INT MOD OFF control on the front panel The INT MOD OFF control potentiometer POT varies the output level The tone generator can be keyed off by in serting a phone jack into the EXT MOD connec tor b The fixed tone generator is a resistor capacitor RC operational amplifier oscillator which adjusts the frequency to approximately 1 kHz The signal is applied to the 1 kHz INT MOD OFF control which controls the amplitude C If there is an external modulation input at thc EXT MOD connector it is presented for summation in tile Dual Tone Generator Assembly
226. X F 10 Frequency delivered to 1080 MHz Multiplier Mixer 10 100 MHz Frequency produced within 79 80 MHz Loop Board livered to 100 MHz Multiplier 108 MHz Mixer COMB FREQUENCY Fc LEFTMOST DIGIT OF FREQUENCY MHz THUMBWHEELS Fc 0 or 1 1100 MHz 2013 1300 2 4 5 1500 2 1700 MHz 8019 1900 2 5 41 TM 11 6625 3016 14 Reading VCO VCO vco VCO v c o Fc Spectrum Analyzer Display of High Frequency Multiplier Mixer Test Point 5 42 Table 5 6 1st and 2nd Local oscillators Sheet 2 of 3 Meaning Frequency generated by 1200 2200 MHz Oscillator It equals 1200 MHz plus the value of the three leftmost digits of the FREQUEN CY MHz thumbwheels in MHz Frequency generated by 1200 2200 MHz Oscillator as a result of an external voltage control DC voltage sent to 1200 2200 MHz Oscillator from the tuning integrator in the V C O Tuner Circuit Board This voltage con trols the frequency of the 1200 2200 MHz Oscillator DC voltages sent to the 1200 2200 MHz Oscillator by an exter nal dc source Frequency delivered to Heterodyne Amplifier 2 Prescaler from the High Frequency Multiplier Mixer Frequency sent to the High Frequency Phase Lock Circuit Board from the Heterodyne Amplifier 2 Prescaler Refer to the table of Fc values For the selected frequency the required power level is 18 dBm to 25 dBm The unselected frequenc
227. Y RSI 1 4 DRIVER 604068 694066 gh i 12 7 11V 19448 PULSE COUNTER T 250 kHz amp AGC AMP kHz LP FILTER 15 cu P O P3101 isn Ennor p R3 5 420 cw Bx ERROR P QP3101 Ph d Hy SD SKH ERROR as Raz Gen L P FILTER 3 SQUELCHED FM AUNG 4NEG POS gt WIDE NARROW EKSH 1 BH 3 3 3 Gan 3 FM AUDIO SCOPE DEV R44 TO R45 3300 DS cw 50 ut Ee Figure 6 21 250 kHz i f monitor audio A1A13 schematic diagram sheet 2 of 3 6 55 6 56 blank TM11 6625 3016 14 MC 15 2 KSH 2 GISH 21 P OP31I01 250 kHz AMP QUT 250 kHz TO SCOPE C38 AM bs a tite hase a cal SR myler uy x38 AGC AMP IN4148 3 1 4 8 604066 5 14 27 R90 1458 L IN448 3 ik 2 7 914 R95 2 222 242222 68k R97 AGC 68k 330 CRIS 194148 ay ney AGC ADJ RIS 520 194148 jant lv CRIS I R9 13 504066 10 4700 a SQUELCHED AM AUDIO L 7 2244 109 k n Y 7 V n d RIO GND TANT SQUELCH IB ZH SIG LEVEL OUT lt
228. agpipe d Noise Noise is random both amplitude and frequency produces a sound similar to that heard when a receiver is not tuned to a station and the VOL control is turned to maximum e Gulls This signal consists of a quick rise and slow fall of a variable audio frequency The sound is similar to the cry of the sea gull f Tone This signal consists of a single audio frequency of unvarying tone It produces a steady howl Another method of tone jamming is to vary it slowly This produces a howling sound of varying pitch 3 Antijamming procedures When it is determined that the incoming signal is being jammed notify your immediate superior officer and continue to operate the equipment To provide maximum intelligibility of jammed signals follow one or more of the operational proce dures given in the following steps If these procedures do not provide suffi cient signal separation for satisfactory operation change to an alternate fre quency a Detune FREQUENCY MHz thumbwheel switches by several incre ments on either side of received signal FREQUENCY MHz Illustration TM 11 6625 3016 14 Table 4 10 Receiver Operating Instructions Continued Step Procedure Illustration 9 This may cause some separation of re Cent ceived signal and jamming signal b Vary VOL control This may reduce jamming signal enough to permit weak signal to be heard c Refer to_table 4 2 for furth
229. and from jack A1A3A2J4 and A1A3A3J1 respectively 4 Attach plug A1A3ASP1 removed in step 3 to jack A1A3A2J4 Align or adjust assembly Power Monitor A1A17 Spectrum Analyzer A1208 a b 250 KHz Monitor Audio A1A13 FM AM Generator A1A24A3 250 KHz Monitor Audio A1A13 FM AM Generator A1A24A3 High Frequency Multiplier Mixer A1A26 VCO Tuner A1A11 1080 MHz Multiplier Amplifier A1A15 250 KHz Monitor Audio A1A13 FM AM Generator A1A24A3 a b High Frequency Multiplier Mixer A1A26 VCO Tuner A1A11 5 On High Frequency Phase Lock A1A9 tag and remove plug A1A9P3 from jack A1A9J3 6 Attach SMB tee adapter to jack A1A9J3 on High Frequency Phase Lock A1A9 7 Attach plug A1A9P3 removed in step 5 to the tee adapter 8 Connect coaxial cable between the SMB tee adapter at A1A9J3 and the SCOPE IN connector on AN GRM 114 front panel 9 Set the oscilloscope controls for a display of 0 to 8 V dc 10 On VCO Tuner A1A11 set A1A11R3 fully cw Measure and record the dc level displayed on the oscilloscope 15 On 1200 2200 MHz Oscillator A1A3 A2 set A1A3A2A1R1 fully cw 16 Observe the tune line on the oscillo scope while varying A1A11R3 fully through its entire range and check that the tune line does not oscillate and is centered on the center hori zontal line NOTE When performing step 16 if cor rect skip to step 19 if the tune
230. ar of Front Panel 44 figure 5 47 Solder tagged wires to assembly for EXT ACC connector 104 at rear of Front Panel 44 figure 5 47 Attach flat washer and hex nut to Front Panel 44 at EXT MOD con nector 103 figure 5 47 Install assembly and lockwasher to rear of Front Panel Solder tagged wires to assembly at rear of Front Panel 44 figure 5 47 Install BFO OFF switch assembly 102 hex nut and washer to Front Panel 44 5 47 Attach hex nut to rear of Front Panel 44 Solder tagged wires to switch assem bly at rear of Front Panel 44 figure 5 47 Attach hex nut and flat washer Attach hex nut to Front Panel 44 at BFO OFF switch 102 5 47 Install AM FM switch assembly 101 hex nut and washer to Front Panel 44 figure 5 47 27 Attach hex nut to rear of Front Panel 44 5 47 28 Solder tagged wires to switch assem bly at rear of Front Panel 44 fig ure 5 47 29 Attach hex nut and flat washer 30 Attach hex nut to Front Panel 44 at AM FM switch 101 figure 5 47 31 Install INT MOD RCVR switch assem bly 100 hex nut and washer to Front Panel 44 figure 5 47 32 Attach hex nut to rear of Front Panel 44 figure 5 47 83 Solder tagged wires to switch assem bly at rear of Front Panel 44 figure 5 47 34 Attach hex nut and flat washer 35 Attach hex nut to Front Panel 44 at INT MO
231. ator 59 Remove Duty Cycle Regulator 59 from Rear Panel 58 5 46 lo 11 12 13 14 15 16 17 18 TM 11 6625 3016 14 Unscrew semirigid coax hex nut con nection from Transmitter Sensor 62 figure 5 46 Tag and unsolder wire from feed thru capacitor Unscrew hex nut connection between 20 dB Pad 61 and Transmitter Sen sor Assembly 62 fiqure 5 46 Remove Transmitter Sensor 62 fig ure 5 46 Remove four 3 8 Phillips screws which secure 20 dB Pad 61 to Rear Panel 58 figure 5 46 Unscrew hex nut connection between Power Monitor 60 and 20 dB Pad Assembly 61 figure 5 46 Tag and disconnect coax cables from Power Monitor Assembly 60 5 46 Remove 20 dB Pad 61 figure 5 46 Remove Power Monitor 60 from 20 dB Pad 61 figure 5 46 Remove two 3 3 4 Phillips screws 64 and two flat washers 65 which hold Modified Battery Assembly 66 to Rear Panel 58 figure 5 46 Unplug 2 pin Molex connector 139 figure 5 46 Remove Modified Battery Assembly 66 figure 5 46 Remove four screws two lockwashers and two ground lugs from Rear Panel 58 which secure transformer mount ing bracket and transformer 67 to Rear Panel 58 figure 5 46 Tag and unsolder wires from trans former 67 figure 5 46 5 161 TM 11 6625 3016 14 5 162 19 Remove transformer mounting brack 1 10 ets transf
232. ceived signal may be displayed on the Spec trum Analyzer refer to paragraph 3 9 where amplitude bandwidth and spectral purity may be measured and examined b AN GRM 114 AM FM rf signal generator refer to paragraph 3 3 permits the technician to inject low power CW AM or FM signals from 100 Hz to 999 9999 MHz into a unit under test JUT The FREQUENCY MHz thumbswitches on the front panel control the digital frequency synthesis circuitry which sets the generator to the selected frequency The AN GRM 114 rf signal generator frequently is speci fied as accurate to within 00005 of the selected frequency Typically it is accurate to within 00002 The TCXO is principally responsible for maintaining generator frequency accuracy and stability The rf signal generator may be AM or FM modulated by using the internal Dual Tone Generator and or an external audio signal ap plied to the EXT MOD jack on the front panel FM deviation and depth of AM modulation may be set by adjusting the amplitude of the modulat ing signal s The amount of FM deviation may be read on the DEVIATION KHz WATTS meter refer to and or displayed on the oscilloscope The percentage of AM modulation may be determined by displaying the AM modu lation envelope on the oscilloscope and or by using the AM modulation function of the Multi meter MM 100 3 2 Receive Theory Refer to figure 3 2 for a block diagram a Antenna input is received at t
233. controlled oscillator V dc volts direct current V DIV volts per division v p p volts peak to peak V rms volts root mean square vert vertical vol volume W watt xtal crystal lt less than gt greater than Table 5 3 AN GRM 114 Performance Test Initial Conditions Step AN GRM 114 setting 1 INTENSITY control to 3 o clock position 2 EXT V DIV switch to 15 KHz 3 EXT V DIV vernier to CAL 4 AC DC switch to DG 5 SWEEP switch to 1 mS 6 SWEEP vernier to CAL 7 MODULATION FREQ Hz switches to 1000 0 8 INT MOD control to OFF 9 1 KHz INT MOD control to OFF 10 VERT control to 12 o clock position 11 ANALY DISPR control ccw to OFF 12 HORIZ control to 12 o clock position 13 1 5 1 5 15 KHz switch to 15 14 AM FM switch to AM 15 BFO switch to OFF 5 5 TM 11 6625 3016 14 Table 5 3 AN GRM 114 Performance Test Initial Conditions Continued Step D D D D D ND D D AN GRM 114 setting FREQUENCY MHz switch to 1110000 VOL control to 9 o clock position INT MOD RCVR switch to RCVR SQUELCH control ccw to detent stop not off DEV PWR switch to SIG GEN RCVR switch to RCVR RCVR WIDE MID NARROW switch to NARROW RF LEVEL BFO INJECTION dial to 10 HI LVL NORM switch to NORM AUTO ZERO BATT switch to AUTO Plug line cord into an active AC outlet Table 5 4 AN GRM 114 Performance Test Initial Conditions Step 01 why gt 5 6 A
234. cuit Board 1080 MHz Multiplier Amplifier Case Swing Upper Floor out ist Mixer Semi rigid coax cables from 1200 MHz Diode Switch Case Speaker Case Case 108 MHz Bandpass Filter Case Swing Lower Floor out Case Swing Lower Floor out FM AM Generator e o ooao Module removal steps Module to be removed 120 MHz Receiver A1A24A2 Duty Cycle Regulator 1 Transmitter Sensor 4 20 dB Pad A1A8AT1 Power Monitor A1A17 Battery Modified Mechanical Assembly A1A23 Transformer Spectrum Analyzer Assembly A1A18 Dual Tone Generator A1A12 FREQ ERROR KHz meter Frequency Select Switch Assembly FREQUENCY MHz Thumbwheels A1A27 DEVIATION KHz WATTS meter Table 5 13 Disassembly Sequence Continued Module disassembly steps g 11 14 h 14 16 h 17 19 4 11 i 12 14 i 15 17 i 18 20 i 21 23 TM 11 6625 3016 14 Module removal Modules which must be removed first steps Case Swing Lower Floor out FM AM Generator 100 MHz Amplifier 108 MHz Mixer Case Swing Upper Floor out Case Case Swing Upper Floor out Duty Cycle Regulator Transmitter Sensor Case Swing Upper Floor out Duty Cycle Regulator Transmitter Sensor 20 dB Pad Case Swing Upper Floor out Case Case Swing Upper Floor out Tilt Front Panel forward Case Swin
235. curacy Volts Range Accuracy Selectable Impedances Specification 5 x 10 0 00005 2 x 107 typical Greater accuracy is attainable with front panel adjustment 2 to 3 ppm during first year 1 ppm per year thereafter Typically 1 5 V above 1 MHz sensitivity is reduced below 1 MHz 1 5 kHz 5 kHz 15 kHz full scale 50 Hz calibration marks at 100 Hz on 1 5 kHz range Frequency error meter is automatically zeroed every 1 5 seconds during a 3 ms time period Auto zeroing may be disabled with AUTO OFF ZERO BATT switch 3 20 dB 1 5 dB 0 10 and 0 30 1V 3V 1V 3V 10V 30V 100V and 300V full scale 3 full scale 1 M Q input 2 1 to 300 V rms full scale 3 full scale 25 Hz 25 kHz 3 2 8 150 and 600 and 1 M Q unbalanced TM 11 6625 3016 14 Table 1 2 Electrical Characteristics Continued Characteristics Specifications AM Range 0 100 AC Load HI Z 1 M Q Ohms 30 Q center scale x 1 Fuse 1 32 A normal blow Table 1 3 Environmental Characteristics Characteristics Specifications Temperature Range Internal Test Set 32 to 122 F O to 50 1 10 Items Supplied Table 1 4 lists the items 1 11 Items Required but not supplied Items supplied required that are not supplied are listed in table Tools and Test Equipment Table 1 4 Items Supplied Item Quantity AN GRM 114 includes multimeter MM 100 1 Attenuator
236. diagram MM 100 assembly A2A1A1 component location diagram AN GRM 114 disassembly reassembly diagram Front panel disassembly reassembly diagram Upper floor disassembly reassembly diagram MM 100 multimeter disassembly reassembly diagram AN GRM 114 mother board A1A2 schematic diagram 2 sheets AN GRM 114 interconnect A1 schematic diagram 2 sheets AN GRM 114 front panel assembly A1A1 schematic diagram 2 sheets AN GRM 114 coaxial cable assembly A1A22 schematic diagram AN GRM 114 upper floor assembly A1A3 schematic diagram Heterodyne amplifier 2 prescaler A1A3A1 schematic diagram 1200 2200 MHz oscillator A1A3A2 schematic diagram AGC system A1A3A3 schematic diagram Clock divider A1A3A4 schematic diagram TCXO output distribution amplifier A1A3A5 schematic diagram Transmitter sensor A1A4 schematic diagram 108 MHz bandpass filter A1A5 schematic diagram 1200 MHz amplifier A1A6 schematic diagram Static discharge protector A1A7 schematic diagram Rear panel assembly A1A8 schematic diagram Duty cycle regulator A1A8A1 schematic diagram High frequency phase lock A1A9 schematic diagram 79 80 MHz loop 10 schematic diagram 2 sheets VCO tuner A1A11 schematic diagram Dual tone generator A1A12 schematic diagram 2 sheets 250 kHz i f monitor audio A1A13 schematic diagram 3 sheets Regulator and power supply A1A14 schematic diagram 1080 MHz multiplier amplifier A1A15 schematic diagram 1200 MHz diode switch A1A16
237. dures bat tery weakening refer to table 4 2 Stopping procedures Refer to the stopping procedures in table 4 2 on the oscilloscope Table 4 8 lists the operating instructions Do not apply inure than 200 V peak to eak to the SCOPE IN PUT connector If an oscilloscope NOTE To apply power to the AN GRM 114 refer to the instructions in probe is used to apply a signal from UUT to the SCOPE IN PUT connector attach the ground lead of the probe to UUT ground Warm ine EH ie ape proximately 30 seconds from a cold startup The trace will not appear until the crt warms up Figure 4 3 Oscilloscopc controls indicators and connectors Reference No Step TM 11 6625 3016 14 Table 4 7 Oscilloscope Initial Adjustments and Control Settings Initial adjustment Control indicator or connector _ SWEEP control EXT V DIV vernier control 2 SWEEP vernier control 3 AC OFF DC switch 4 5 EXT V DIV control 6 INTENSITY control 7 HORIZ control 8 FOCUS control 9 VERT control 0 ANALY DISPR OFF settin 1ms Fully cw detent CAL AC Fully cw detent in CAL 10 V DIV Midrange Midrange Midrange Miderange Fully ccw control detent OFF Table 4 8 Oscilloscope Operating Procedures Procedure CAUTION Do not exceed 200 V peak to peak into the SCOPE IN con nector When applying power to oscilloscope or spectrum analyzer
238. e 9 pin Resistor 470 Q Coax cable with sniffer loop Test lead SMB to SMB 2 Resistor 300 14W Resistor 300 k 1 Resistor 30 k 1 Resistor 600 5 Resistor 150 5 Resistor 8 596 Resistor 3 3 5 Tool kit Electronic Equipment TK 100 G Tool number IFR 6050 0032 400 51190 IFR 6050 0092 400 51190 IFR 6050 0522 400 511 90 IFR 2200 0250 100 51190 IFR 2105 1410 900 51190 IFR 2123 0000 016 51190 IFR 2200 0110 100 51190 IFR 6500 9801 700 51190 IFR 6046 9801 800 51190 IFR 4702 0471 003 51190 IFR 6050 0534 800 51190 IFR 6050 0042 220 51190 IFR 4706 3011 001 51190 5 3 TM 11 6625 3016 14 5 4 Glossary Table 5 2 contains a glossary of frequently used abbreviations found within this manual 5 5 AN GRM 114 Performance Test Figure 5 2 and tables 5 3 and provide performance testing information for the AN GRM 114 These procedures set forth specific requirements that the unit must meet before it is returned to the using organization The procedures may be used as minimum per formance tests or used to confirm a fault within a unit suspected of failure Isolation of a con firmed fault is provided section paragraph 5 6 in the troubleshooting b Presentation The performance test pro vided is given in the form of a flowchart Follow the step by step directions given within this f
239. e 5 47 Remove four hex nuts 72 and four lockwashers 73 which secure Dual Tone Generator Assembly 74 to Front Panel 44 figure 5 47 Remove Dual Tone Generator Assem bly 74 from Front Panel 44 5 47 Remove two hex nuts and solder lugs from Frequency Error Meter 81 ter minals figure 5 47 Remove two screws which hold meter to rear of Front Panel 44 figure 5 47 Remove meter from Front Panel Tag and disconnect two multi pin plugs from Frequency MHz Select Switch Assembly PCB 79 5 47 Remove four hex nuts 75 four lockwashers 76 and four flat washers 77 which hold Frequency MHz Select Switch Assembly 78 to Front Panel 44 figure 5 47 Remove assembly from Front Panel Remove two hex nuts and solder lugs from Deviation KHz WATTS meter 80 terminals figure 5 47 Remove two screws which secure meter to Front Panel 44 5 47 Remove meter from Front Panel 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 Remove and lockwasher which secure ANT INPUT jack 82 to Front Panel 44 figure 5 47 Remove ANT INPUT jack from Front Panel Use an Allen wrench to loosen socket head screws 83 which secure knob 84 to shaft of DEV PWR switch shaft figure 5 47 Tag and unsolder wires from DEV PWR switch wafer terminals Remove hex nut 110 and flat washer which
240. e five tuned cavities within the High Frequency Multiplier Mixer The outputs of the tuned cavities are selected by the VCO Tuner figure 6 19 which is controlled by the leftmost digit of the FREQUENCY MHz thumbwheels figure 6 4 The value of the left most digit also selects the frequency range of the 1200 2200 MHz Oscillator through the VCO Tuner If the digit is O or 1 the 1100 MHz cavity is selected and the 1200 2200 MHz Oscillator is 1200 1399 MHz If it is 2 or 3 the 1300 MHz cavity is selected and the Oscillator is 1400 1599 MHz If the digit is 4 or 5 the 1600 MHz cavity and the 1600 1799 MHz range are selected The 1700 MHz cavity and the 1800 1999 MHz range are selected when the digit is 6 or 7 The 1900 MHz cavity and the 2000 2199 MHz range are selected if the digit is 8 or 9 The 1200 2200 MHz Oscillator applies its selected fre quency to the High Frequency Mutliplier Mixer where it is mixed with the frequency of the se lected tuned cavity to produce a signal from 100 to 299 MHz This signal is applied to the Hetero Amplifier 2 Prescaler figure 6 6 which divides it into an output signal between 50 and 149 5 MHz This signal is applied to the High Frequency Phase Lock figure 6 17 and is divid ed in a programmable divider circuit by a number between 100 and 299 which is selected by the first three digits 100 10 and I MHz of the FRE QUENCY MHz thumbwheels The resulting fre quency provides on
241. e input to the phase detector 3 8 circuit The TCXO through the TCXO Output Dis tribution Amplifier applies a 10 MHz signal to the reference circuit of the High Frequency Phase Lock This 10 MHz signal is divided by twenty and provides a 500 kHz reference for the phase detec tor If frequency phase difference is detected be tween the programmable divider circuit and the 500 kHz reference the resultant difference signal a dc level is applied to the VCO Tuner which in turn slews the 1200 2200 MHz VCO frequency as necessary until the output of the programmable divider settles at 500 kHz At this point the High Frequency Phase lock loop is locked on frequency High Frequency Multiplier Mixer Heterodyne Amplifier 2 Prescaler High Frequency Phase Lock VCO Tuner and 1200 2200 MHz Oscillator The VCO Tuner also applies a fast tune line to the AGC System figure 6 8 which applies it to the 1200 2200 MHz Oscillator to provide controlled gain of the loop at the selected frequency The 1200 2200 MHz Oscillator applies a signal which is the output of the 1st local oscillator to the 1st Mixer An indication that the High Frequency Phase Lock loop is operating properly is that the left lock lamp is lit 3 6 2nd Local Oscillator Theory Refer to figurel 3 6 for a block diagram The TXCO sends a 10 MHZ signal through the TCXO Output Distribution Amplifier to the Clock Divider figure 6 9 The Clock Divid er reduces th
242. e signal to 100 Hz and applies it to the 79 80 MHz Loop figure 6 18 The value of the four rightmost digits of the FREQUENCY MHz thumbwheels determine the output of the 79 80 MHz Loop The frequency varies from 7 90001 MHz if the digits are 9999 to 8 00000 MHz if the digits are 0000 When the 79 80 MHz Loop is operating properly the right lock lamp on the front panel will be lit The output frequency is applied to the 100 MHz Amplifier 108 MHz Mixer figure 6 36 which mixes the signal with 100 MHz The output signal which is between 107 90001 MHz and 108 00000 MHz is applied to the 108 MHz Bandpass Filter figure 6 12 then to the 108 O MHZ Multiplier Amplifier figure 6 23 where it is multiplied by ten The resulting signal 1079 0001 MHz to 1080 0000 MHz is the output of the 2nd local oscillator It is applied to 2nd Mixer figure 6 33 3 7 Dual Tone Generator Theory Refer to fig ure 3 7 for a block diagram TM 11 6625 3016 14 TCXO MASTER OSCILLATOR TCXO MASTER OSCILLATOR OUTPUT DISTRIBUTION AMPLIFIER TO 1ST MIXER 100 MHz MULTIPLIER 108 MHz MIXER SELECTED FREQUENCY 1200 2200 MHz OSCILLATOR 100 MHz FILTER HIGH FREQUENCY MULTIPLIER MIXER AGC CIRCUIT BOARD 100 299 MHz HETERODYNE AMPLIFIER 72 PRESCALER SLEW SIGNAL 50 149 5 MHz HIGH FREQUENCY PHASE LOCK DC LEVEL TUNER 10 MHz CIRCUIT
243. ed bench equipment as well as a rubber floor mat underneath operator chair e Heed all WARNINGS and CAUTIONS concerning maximum voltage and power inputs INSTRUCTIONS f When operating AN GRM 114 in con junction with a unit under test UUT apply power in following sequence 1 The device receiving an input is energized first 2 The device generating an output is energized second g Avoid using oscilloscope spectrum ana lyzer in direct sunlight as scope trace is dfficult to see under these conditions h Do not allow scope trace to become con centrated on CRT as a stationary spot as CRT screen may be burned permanently Reduce trace intensity if trace must remain stationary i Protect AN GRM 114 from vibration mechanical shock The CRT is highly evacuated and if broken will implode causing possible ous injury from fragmented glass 4 2 AN GRM 114 Controls indicators and Con nectors lists the controls indicators anti connectors of the AN GRM 114 Table 4 1 AN GRM 114 Controls Indicators and Connectors Control indicator or connector DEVIATION KHz WATTS meter 0 dBm lamp HI LVL uV x 100 NORM switch Function Provides visual display of peak FM deviation transmitter output power received signal strength and internal battery charge condition Lights when rf signal output is at 0 dBm or above 3 position switch which selects power range for RF LEVEL BFO INJECTION dia
244. ed by the Spectrum Analyzer in the following manner Spectrum Analyzer Module No 1 receives a 1 20 MHz input from the 2nd Mixer figure 6 33 The signal is amplified and filtered then mixed with the swept frequency of a Voltage Controlled oscillator V C O which has a center frequency of 145 MHz The resulting 25 MHz signal is filtered by a 25 MHz crystal filter which has a bandpass of 30 kHz The 25 MHz signal then mixes with a signal from a 26 MHz crystal oscillator This pro duces a 1 MHz signal which is applied to the loga rithmic log amplifier on Spectrum Analyzer Module No 2 6 29 Output of the log amplifier is applied to a detector and output of the detector is applied to the Spectrum Analyzer input of the vertical deflection amplifier on the oscilloscope Main Circuit Board figure 6 30 A signal is then applied from the Main Circuit Board to the Inverter Circuit Board then to the vertical deflection plates of the crt to display the amplitude c Frequency is displayed on the Spectrurn Analyzer in the following manner An 18 Hz saw tooth signal produced on Spectrum Analyzer Module No 1 is the crt sweep signal It is applied to the varactor tune circuit on Spectrum Analyzer Module No 1 The varactor tune voltage is con trolled by the ANALY DISPR contorl When the ANALY DISPR control is turned ccw but short of detent dispersion is minimum and the varactor causes the V C O to sweep from 145 5 MHz to 144 5
245. ed components as required 1 Check for scratches dents punctures badly worn areas broken covers or other evidence reflective of possible internal damage 2 Check for burned or scorched paint on AN GRM 114 covers indicating possible AN GRM 114 overheating 3 Check for evidence of corrosion b Inspect AN GRM 114 controls and indi cators for defective or damaged hardware repair or replace damaged components as required 1 Check for loose control knobs 2 Check for cracked or broken lamps 3 Check for burned out indicator lamps 4 Check for defective control knob or switch detents Inspect AN GRM 114 connectors for visible damage repair or replace damaged com ponents as required 1 Check for corroded contacts pins etc 2 Check for loose bent or broken pins 3 Check for damaged connector hous ings or insulation TM 11 6625 3016 14 4 Check for improperly soldered or broken connections 5 10 Performance Verification Successful com pletion of the Performance Test and Troubleshooting para 5 6 flowcharts assure per performance of the AN GRM 114 5 11 Disassembly Instructions a General The following procedures pro vide a complete breakdown of the AN GRM 114 including all assemblies therein Disassemble only as far as is necessary to reach the desired assembly and or to effect any repair b Precautions and General Techniques Mark or otherwise identify
246. eference and connect coaxial cable between the high frequency sniffer and the spectrum analyzer Set FREQUENCY MHz thumbwheels to the frequencies listed in table 5 12 and check and record selected tune pulse frequency and amplitude as listed When performing step 9 if the se lected tune pulse is not within toler ance make the adjustment as listed above in table 5 12 to achieve the tolerance Record each selected tune pulse Check that all selected tune pulses recorded in either step 9 or 10 are within 3 dB of one another When performing step 11 if any selected tune pulse is not within tolerance adjust all selected tune pulses to achieve the 3 dB tolerance Turn power off remove the power cord from its source of power remove the high frequency sniffer from A1A26 assembly and remove the extender from A1A26J4 and 1 A26P4 Reinstall the A1A26 assembly in the AN GRM 114 5 115 TM 11 6625 3016 14 Table 5 12 Tune Pulse Frequency and Amplitude Tests FREQUENCY Frequency MHz switch settings 1100 1300 1500 1700 1900 0000000 18 to 25 dB Below 43 dB Below 43 dB Below 43 dB Below 43 dB 2000000 Below 43 dB 18 to 25 dB Below 43 dB Below 43 dB Below 43 dB 4000000 Below 43 dB Below 43 dB 18 to 25 dB Below 43 dB Below 43 dB 6000000 Below 43 dB Below 43 dB Below 43 dB 18 to 25 dB Below 43 dB 8000000 Below 43 dB Below 43 dB Below 43 dB Below 43 dB 18
247. efully remove AN GRM 114 Save shipping carton and all packing material for possible reuse 2 2 Assembly The AN GRM 114 comes fully assembled except for the antenna Refer to paragraph 7 for assembly instructions and drawings 2 3 Checking Unpacked Equipment Inspect all equipment for visible or con cealed damage which may have occurred during shipment If the equipment has been damaged refer to RECEIVING INSPECTION UNPACKING sticker af fixed to shipping container for Damage Claim procedure b Check the equipment and accessories against the packing slip Report all discrepancies in accordance with the Damage Claim procedure 2 4 Siting The AN GRM 114 may be battery operated in nearly any location Mobile aircraft or marine operation is possible directly from 11 to 28 V dc power systems using a furnished ciga rette lighter adapter plug AC operation is possible from 110 230 V ac 50 to 400 Hz power sources 2 5 Installation Instructions a Extend support bracket on bottom of unit to fully locked position and place the set on flat surface bottom side down Bottom side of unit has four plastic feet b Unlatch and fold back lid exposing front panel face of unit If desired lid can be detached from set at hinges by sliding lid to operator s right C Remove retaining plate inside lid by ro tating quick release latch counterclock wise ccw and gently pulling plate straight out
248. ent Characteristics lists the physical characteristics of the Communica tions Service Monitor AN GRM 114 lists the electrical characteristics and table 1 3 lists the environmental characteristics 1 1 TM 11 6625 3016 14 Table 1 1 Physical Characteristics Characteristics Specification Power 110 230 V ac 50 to 400 Hz or 11 to 28 V dc Size 12 5 in wide 31 8 cm 8 in high 20 3 cm 19 5 in deep 49 5 cm Weight Approximately 52 lb 22 4 kg 4 3 A at 12 V and 1 85 A at 28 V With os cilloscope receiver ON and Dual Tone Gen erator Spectrum Analyzer OFF Typical DC Currents Typical Power Consumption 80 W Internal Battery 12 V dc 5 0 Ah Table 1 2 Electrical Characteristics Characteristics Specification RF Signal Generator Frequency Range 100 Hz to 999 9999 MHz in 100 Hz steps 5 10 0 00005 2 x 10 typically See specification on TCXO Master Frequency Accuracy Oscillator FM Quieting 42 dB below 3 3 kHz deviation at 1 kHz rate as measured in a 0 3 to 3 kHz post detection bandwidth Residual FM Less than 100 Hz RF Output Power 130 dBm to 33 dBm 100 Hz 999 9999 MHz 130 dBm to O dBm 20 kHz 16 Hz continuously variable into 50 Q Ranges NORM Normal HV x 100 and HI LVL High Level 0 dBm Accuracy 110 to 35 dBm 2 5 dB to 400 MHz 3 0 dB above 400 MHz These specifications may not be met at certain frequencies as a result of the in ternal design o
249. ep Procedure 6 Measure and record peak of displayed signal along vertical dB scale dBm SCALE MAJOR MAJOR VERTICAL HORIZONTAL AXIS AXIS 7 Offset displayed signal to either side of major vertical axis by two major graticule divisions by increasing or decreasing settings of FREQUENCY MHz thumb wheels CRT DISPLAY TM 11 6625 3016 14 Table 4 12 Spectrum Analyzer Operating Instructions Continued Step Procedure Illustration 8 Place BFO OFF switch to BFO CRT DISPLAY 9 Rotate RF LEVEL BFO INJECTION dial cw so that injected bfo signal is the same amplitude as signal under test NOTE If injected bfo signal cannot be raised to amplitude of signal un der test set HI LVL uV X 100 NORM switch to uV X 100 Again rotate RF LEVEL BFO INJECTION dial cw until in jected bfo signal matches am plitude of signal under test HI LVL UV X 100 NORM RF LEVEL BFO INJECTION 4 42 TM 11 625 3016 14 Table 4 12 Spectrum Analyzer Operating Instructions Continued Step Procedure Illustration 10 Read signal strength of signal under test on uV or dBm scale of RF LEVEL BFO INJECTION dial as follows a If HI LVL uV X 100 NORM switch is at NORM setting of RF LEVEL BFO INJECTION dial repre sents measured signal strength b If HI LVL uV X 100 NORM switch is at HV X 100 add 40 dBm to reading of RF LEVEL BFO INJEC TION dial on dBm scale to obtain true signal strength in dBm For
250. equency Range Resolution 10 dB Sinad Sensitivity Selectivity at 3 dB Point Narrow Mid Wide Quieting Adjacent Channel Rejection Beat Frequency Oscillator Accuracy Demodulation Output Level AM FM Receiver Antenna Input Protection Power Monitor Frequency Range Power Ranges Accuracy 1 to 600 MHz 600 MHz to 1 GHz Input Power Specification 2 maximum 0 7 maximum 2 maximum 300 kHz to 999 9999 MHz 100 Hz 2 V typical Receiver 15 kHz detector audio bandwidth is 8 kHz Receiver 150 kHz detector audio bandwidth is 8 kHz Receiver 150 kHz detector audio bandwidth is 80 kHz Deviation measurements can be made down to 0 1 kHz Greater than 25 dB at 25 kHz typical Greater than 40 dB at 50 kHz typical BFO is phase locked to master oscillator 3 dB from 2 uV to 5000 pV 100 0 5 V peak to peak nominal 10 kHz 0 65 V peak to peak nominal 0 25 watts maximum level without damage 1 MHz to 1 GHz 0 to 10 and 0 to 100 watts 10 20 of reading plus 3 of full scale 20 watts continuous 100 watts for 10 seconds TM 11 6625 3016 14 Table 1 2 Electrical Characteristics Continued Characteristics TCXO Master Oscillator Accuracy Aging Stability Frequency Error Meter Measurement Capability Meter Sensitivity Ranges Resolution Zeroing MM 100 Multimeter SINAD Range Accuracy Distortion DIST Range DC Volts Ranges Ac
251. er 25 figure 5 46 Front Panel Reassembly Attach socket head screws with Allen wrench to KHz control 122 Attach control 122 5 47 Use an Allen wrench to attach socket head screws to EXT V DIV Control 118 Attach control 118 hex nut 119 and washer 120 figure 5 46 Use an Allen wrench to attach socket head screws to EXT V DIV Vernier Control 117 Attach control 117 figure 5 46 Attach hex nut washer and SCOPE IN connector 107 figure 5 47 Tighten hex nut Attach tagged coax cable to SCOPE IN connector 107 at rear of Front Panel 44 5 47 Install assembly and washer to rear of Front Panel 44 figure 5 47 Solder tagged wires to assembly at rear of Front Panel 44 figure 5 47 Attach hex nut and washer to Front Panel 44 figure 5 47 Use an Allen wrench to attach two socket head screws to each of two knobs 106 108 at INT MOD OFF control 111 figure 5 47 11 12 13 14 15 16 17 18 19 20 22 23 24 25 26 Install INT MOD OFF connector 105 figure 5 47 Attach hex nut to rear of Front Panel 44 which holds INT MOD OUT connector 105 to Front Panel figure 5 47 Install assembly and hex nut Tighten hex nut at rear of Front Panel 44 figure 5 47 Install EXT ACC connector 104 through front of Front Panel 44 figure 5 47 Attach hex nut to re
252. er emergency operating procedures battery weakening 10 Stopping procedures Refer to the stopping procedures in table 4 2 4 7 Spectrum Analyzer Operating Instructions NOTE lists the initial adjustments and control settings 4 5 necessary to operate the spec trum AUTE SAU lists the operating in To apply power to the AN GRM structions for use of the spectrum analyzer To de 114 refer to the instructions in tect spurious signals with the spectrum analyzer refer to table 4 13 Figure 4 5 Spectrum analyzer controls indicators and connectors 4 37 TM 11 6625 3016 14 Table 4 1 Initial Adjustments and Control Settings _ Figure 4 5 Reference adjustment No Contol indicator or connector or setting 1 RF LEVEL BFO INJECTION dial Fully ccw 2 GEN RCVR switch RCVR 3 BFO OFF switch OFF 4 INTENSITY control Midrange 5 FOCUS control Midrange 6 ANALY DISPR OFF control Fully cw Table 4 12 Spectrum Analyzer Operating Instructions Step Procedure Illustration 1 CAUTION L i Do not exceed 200 V peak to peak into the SCOPE IN connector NOTE Remove any static discharge from anm unterminated antenna before connecting it to the AN GRM 114 Perform the following steps to measure signal strength CAUTION Maximum continuous input to this connector must not exceed 0 25 W Maximum input is 30 dBm for proper spectrum analyzer operation signals above 30 dBm may cause s
253. erating Instruc ions Table 4 3 lists the initial adjustments Table 4 2 AN GRM Condition startup and control settings necessary to generate rf signals Table 4 4 lists the operat ing instructions Refer to for opera ting instructions for AM signals and refer to table 4 6 for operating instructions for FM sig nals 114 Operating Procedures Procedure a For battery operation set PWR OFF BATT switch on front panel to BATT NOTE Battery will operate for 40 minutes before requiring recharging if oscillo Scope is being used and for 1 hour if it is not Battery may be recharged from external ac power source while source powers AN GRM 114 Whe ther oscilloscope is being used or not AN GRM 114 will shut off every 6 10 minutes When it does immedia tely set PWR OFF BATT switch to BATT position Power will return to unit For operating from external ac or dc power source connect 6 pin socket on end of furnished ac or dc power cable to 6 pin plug on rear panel 4 13 TM 11 6625 1036 14 Table 4 2 AN GRM 114 Operating Procedures Continued Condition Procedure Startup Continued b For ac operation connect 3 pin grounded plug of ac power cable to standard 3 pin grounded outlet Do not connect 3 pin grounded plug to 2 pin outlet through an adapter Electrical shock may result c For dc operation connect cigarette lighter adap ter of dc power cable to cigarette lighter socket d S
254. et the PWR OFF BATT switch on front panel to PWR Emergency If battery weakens and recharging is not practical first disconnect power from UUT if UUT is connected then set PWR OFF BATT switch on front panel to OFF position connect external ac or dc power supply as specified in paragraphs a b or c above then set PWR OFF BATT switch to PWR position Finally connect power to UUT if UUT is con netted Stopping Disconnect power from UUT if UUT is connected Set PWR OFF BATT switch on front panel to OFF position Disconnect UUT from AN GRM 114 Remove power cable socket from plug on rear panel then remove either 3 pin grounded plug ac power cable from 3 pin grounded outlet or cigarette lighter adapter from cigarette lighter socket TM 11 6625 3016 14 Figure 4 2 RF signal generator controls indicators and connector s Table 4 3 RF Signal Generator Initial Adjustments Contol Settings Reference No O Control indicator or connector HI LVL uV x 100 NORM switch RF LEVEL BFO INJECTION dial AUTO OFF ZERO BATT switch RCVR WIDE MID NARROW switch GEN RCVR switch INT MOD RCVR switch INT MOD OFF switch 1 kHz INT MOD control EXT V DIV vernier SWEEP vernier Initial adjustment or setting NORM Fully ccw AUTO NARROW GEN RCVR Fully ccw detent OFF Fully ccw detent OFF CAL Fully cw detent CAL 4 15 TM 11 6625 3016 14 Table 4 4 RF Signal Generator O
255. f the unit TM 11 6625 3016 14 Table 1 2 Electrical Characteristics Continued Characteristics HI Level Power Range Internal Modulation AM FM External Modulation AM FM Oscilloscope Display Size Vertical Bandwidth External Vertical Input Ranges Horizontal Sweep Rate Spectrum Analyzer Dynamic Range Dispersion Bandwidth Resolution Audio Generator Frequency Range Variable Tone Fixed Tone Accuracy Fixed Tone Variable Tone Resolution Output Level Specification 0 dBm 2 5 dB 20 kHz to 600 MHz 4 0 dB 600 MHz to 999 9999 MHz Dial indicator accuracy dBm scale is maintained relative to O dBm indication 10 Hz to 5 kHz 0 to 90 10 Hz to 9999 9 Hz rate 0 to 15 kHz deviation 3 0 V 1V peak to peak produces 90 modulation 6 0 V 2V peak to peak produces 15 kHz deviation maximum modulating frequency 15 kHz 5x5cm DC to 1 MHz at 3 dB bandwidth or dc inputs 10 mV 100 mV 1 V 10 V per division 10 ms 1 ms 100 us 10 per division 70 dB 30 dBm to 100 dBm Continuous from 0 5 MHz to 5 MHz from center frequency 1 to 10 MHz span 30 kHz 10 0 Hz to 9999 9 Hz 1 kHz 20 Hz 0 01 0 1 Hz O to 2 9 V rms minimum for either tone into 150 Q TM 11 6625 3016 14 Table 1 2 Electrical Characteristics Continued Characteristics Distortion 10 Hz to 100 Hz 100 Hz to 9999 9 Hz Fixed Tone Receiver Monitor Fr
256. ft of the 109 3 MHz cry stal oscillator 3rd local oscillator or the 10 95 MHz crystal oscillator 4th local oscillator in the 120 MHz Receiver figure 6 37 and offset errors in the 250 kHz I F Monitor Audio Circuit Board figure 6 21 are corrected These corrections are made at the Frequency Error Meter Driver on the 250 kHz I F Monitor Audio Circuit Board When the AUTO OFF ZERO BATT switch is in the AUTO position an auto zero pulse is produced every 1 5 seconds with a 3 ms on time This pulse is applied to the 250 kHz Monitor Audio Circuit Board and 2nd Mixer figure 6 33 This pulse turns off the 2nd Mixer Receive Diode Switch the Generate Diode Switch the Generate Crossfeed Diode Switch and turns on the Auto Zero Diode Switch It also disables the AGC sys tem in the 250 kHz I F Monitor Audio Circuit Board The 10 MHz input to the 2nd Mixer Diode Switch Assembly from the TCXO Output Distri bution Amplifier figure 6 10 is multiplied to 120 MHz The Auto Zero Diode Switch feeds this 120 MHz signal to the 120 MHz Receiver and Spectrum Analyzer The 120 MHz Auto Zero signal is mixed in the 120 MHz Receiver with a signal from the 109 3 MHz crystal oscillator 3rd local oscillator The difference signal of approximately 10 7 MHz is mixed with a signal from a 10 95 MHz crystal oscilator The difference signal which incorpor ates errors due to drift of the 3rd and 4th local oscillators is approximately 250 kHz
257. g Upper Floor out Tilt Front Panel forward Spectrum Analyzer Assembly Case Swing Upper Floor out Case Swing Upper Floor out FREQ ERROR KHz Meter Tilt Front Panel forward Case Swing Upper Floor out 2nd Mixer o annann NOQ 1 1 9 A x 22200 22200 TR 2 To oO D 9 5 153 TM 11 6625 3016 14 Module to be removed ANT INPUT connector DEV PWR contol HI LVL uV x 100 NORM switch AUTO OFF ZERO BATT switch RF LEVEL BFO INJEC TION Dial Assembly TRANS RCVR connector PWR OFF BATT switch ZERO RCVR switch GEN RCVR switch RCVR WIDE MID NARROW switch 5 154 Module disassembly steps 24 25 26 29 i 30 32 i 33 35 i 36 41 i 42 43 1 44 47 i 18 50 i 51 53 i 54 56 Table 5 13 Disassembly Sequence Continued Modules which must be removed first Case Swing Upper Floor out Tilt Front Panel forward Case Swing Upper Floor out Tilt Front Panel forward FREQ ERROR KHz Meter Case Speaker Case Speaker Case Swing Upper Floor out Tilt Front Panel forward Speaker Case Disconnect semi rigid coax cable from TRANS RCVR connector Case Case Swing Upper Floor out Tilt Front Panel forward FREQ ERROR KHz meter D
258. ged coax cables to 1080 MHz Multiplier Amplifier 33 figure 5 46 Install High Level Amplifier 63 to Mother Board 12 figure 5 46 Attach two 3 8 Phillips screws and two lockwashers to underside of Mother Board 12 which secure High Level Amplifier 63 to Mother Board figure 5 46 Solder wires to feed through capaci tors Install tagged coax cables to High Level Amplifier 63 5 46 Install 250 kHz Monitor Audio Circuit Board 32 figure 5 46 Attach two 3 8 Phillips screws 27 and two lockwashers 28 which secure 250 kHz Monitor Audio Circuit Board guide mounting plate 29 through 1200 MHz Diode Switch High Frequency Multiplier Mixer mounting bracket 30 to lower frame support member 136 figure 5 46 Attach 250 kHz Monitor Audio Circuit Board retainer 74 with two Philips screws 72 and lockwashers 73 to upper frame support member 25 figure 5 46 Plug in Relay Driver Circuit Board 70 to connector and install Cir cuit Board figure 5 46 Attach two 5 16 Phillips screws 68 and two lockwashers 69 which hold Relay Driver Circuit Board 70 to underside of Mother Board 12 figure 5 46 Install 108 MHz Bandpass Filter 71 figure 5 46 38 Attach four 7 16 Phillips screws four lockwashers and four spacers which hold 108 MHz Bandpass Filter 71 to underside of 1200 MHz Diode Switch High Frequency Multi plier Mixer mounti
259. gency operating procedures Refer to theemergency operating procedures in step Softabie 4 10 and in table 4 2 9 Stopping procedures Refer to the stop ping procedures in table 4 2 TM 11 6625 3016 14 4 11 The procedures in table 4 19 are for calibrat 4 12 Frequency Error Measurement ing the master oscillator through an external source lists the initial adjustments and control settings when a 10 MHz off the air reference signal is necessary to measure frequency error available Table 4 21 lists the operating instructions Table 4 19 Master Oscillator Calibration using an External Frequency Standard Illustration Step Procedure 1 Connect one end of coax cable to 10 MHz REF OUT connector AN GRM 114 10 MHz FREQUENCY COUNTER 2 Connect opposite end of coax cable to input of frequency counter 3 Apply power to frequency counter 4 Apply power to AN GRM 114 as instruct ed in 5 For most precise adjustment wait approxi mately 5 minutes before proceeding with Step 6 4 65 TM 11 6625 3016 14 Table 4 19 Master Oscillator Calibration using an External Frequency Standard Continued Step Procedure Illustration 6 Adjust 10 MHz CAL adjustment until frequency counter reads 10 000000 MHz Master oscillator is now calibrated to frequency counter x 22 Jr 9 m 20 32 2 T 10 MHz CAL 7 When calibrating the maste
260. genera tor output frequency and the length of the sweep is controlled by the amplitude of the tone genera tor output The SWEEP vernier control increases the number of pulses displayed when it is not in the CAL position The HORIZ control adjusts the horizontal position of the crt trace TM 11 6625 3016 14 VERTICAL DEFLECTION FROM SPEC ANALYZ OSCILLOSCOPE INVERTE at l BLANKIN 22 i SCOPE IN 200 ___ OSCILLOSCOPE HORIZ MAIN Ne ORIZ INT ad MODULATION VERT SWEEP TONE FROM GEN FOR SPECT SWEEP ANAL YZ pos en TER ooo Figure 3 8 Oscilloscope block diagram TM 11 6625 3016 14 3 9 Spectrum Analyzer Theory Refer 10 figurd 3 9 for a block diagram of Spectrum Analyzer Circuit Board 1 and to Figure 3 10 for a block diagram of Spectrum Analyzer Circuit Board 2 turn the Spectrum Analyzer on the AC OFF DC switch must be in either the AC or DC position This applies power 12 V to the oscilloscope Inverter Circuit Board figure 6 28 The ANALY DISPR control must be out of the fully ccw or detent position When it is out of detent the Oscilloscope inputs to the horizontal and vertical deflective plates of the crt are dis abled the Spectrum Analyzer inputs to the hori zontal and vertical deflection plates are enabled and the HORIZ and VERT controls are disabled b Amplitude is display
261. he ANT INPUT connector and passes through the Static Discharge Protector which limits voltage and cur 3 1 TM 11 6625 3016 14 ANTENNA INPUT STATIC PROTECT SIGNAL SWITCHIN CONNECTOR SIGNAL INPUT OUTPUT f TRANSCEIVER CONNECTION TRANS TRANSMITTER RCVR SENSING amp CONNECTOR ATTENUATION 3 2 OSCILLOSCOPE FREQ ERROR METER DEVIATION 4 SPEAKER DEMOD AUDIO PROCESSING SPECTRUM ANALYZER 120 RECEIVER OSCILLOSCOPE 2ND IF 1ST IF G ist N 2ND MIXER MIXER SL VARIABLE LS oS ATTENUATOR FM AM GENERATOR DUAL TONE GENERATOR MODULATION FREQ Hz THUMBWHEELS FREQUENCY SYNTHESIS FREQUENCY REFERENCE TCXO POWER SUPPLY FREQUENCY MHz THUMBWHEELS Figure 3 1 AN GRM 114 block diagram TM 11 6625 3016 14 FROM STATIC INPUT DISCHARGE FROM PROTECTOR FROM IST LOCAL OSCILLATOR OSCILLATOR INJECTION 1200 MHz DIODE SWITCH 120 MHz RECEIVER SPECTRUM AUTO ZERO ANALYZER FROM REGULATOR TRANS RCVR TRANSMITTER AND POWER CONNECTOR SENSOR SUPPL Y CIRCUIT BOARD OSCILLOSCOPE FREQ ERROR KHz METER AUDIO CIRCUIT BOARD SQUELCH CONTROL DEVIATION 2 5 METER VOLUME CONTROL SPEAKER Figure
262. he output of the AM FM switch is the Demod output of the test set This output is fed to the MM 100 and RCVR contact of the INT MOD RCVR switch The output of the MOD RCVR switch passes through the volume control to the audio amp and out to the Speaker b Transmitter input is applied at the TRANS RCVR connector on the front panel The Transmitter Sensor puts the unit into the Receive mode if the GEN RCVR switch is in the GEN position The signal is at tenuated by a 20 dB pad The output signal is ap plied to the Power Monitor relays The relays are de energized the signal passes through the relays and is detected by the Power Monitor diode The detected signal is applied to the Regulator and Power Supply Circuit Board figure 6 22 where it operates the Power Monitor functions on the cir cuit hoard The circuit hoard sends a signal to the Relay Driver to energize the 1st Mixer relays The applied signal passes through a 60 dB attenuator to the 1st Mixer relay assembly The signal applied at the TRANS RCVR connector is therefore attenuated by a total of 80 dB For ex ample if 100 watts is applied to the TRANS RCVR connector 30 dBm is applied to the 1st Mixer relay assembly The relays are energized and pass the signal to the 1st Mixer circuit From there the signal follows the same path described in paragraph 3 28 3 3 Generate Theory Refer tol figure 3 3 for a block diagram a The 120 MHz FM AM Generat
263. hematic diagram 6 93 6 94 blank DRAFTSMAN NOTE ON SHT 8701 BECOMES 1 SKT 28703 MHz 7627 2348 300 1120 RECESVER P C 20 abst NOTES LAST REF NO USED ATAPAAPC J2 ATAEAAZAICAT 2 Qo 2 REF NO HOT USED 3 ALL RESISTORE ARE 1 4 W 10 UNLESS O HERW SE NOTED 4 ALL RESISTANCE IS EXPRESSE UNLESS OTHERWISE NOTED 5 ALL CAPACITANCE 18 EXPRESSED IN 00 FARADS UNLESS OTHERWISE NOTED ALL REF NO S CARRY AN ASSIENED DESIGNATOR SERIES THIS SCHEMATIC LARRIES SERIES 1 24 2 amp ALAZAABA IT RI 15 DESIGNATED 4 RID D 5 120 47047 4579 FROM 2ND IEKE CE CRYSTAL DEVICES 1660 P5703 2 10 7 X TAL FILTER 1 TM11 6625 3016 14 06 Ske g 3 Figure 6 37 120 MHz receiver A1A24A2 schematic diagram sheet 1 of 2 6 95 6 96 blank TM11 6625 3016 14 AGH 1 H 1 1 250 Hr SH 1 1 MU 45702 50 OUTPUT T LIL ou Sk 18 6 ig I t l a d I t ls i s i Don Lops l 1 E esros n 1 WIDE 13 E2 1 N
264. hillips screws 1 and four lockwashers 36 which secure 1200 2200 MHz Oscillator mechanical assembly 11 to Upper Floor 6 fig ure 5 48 Attach tagged coax cables to 1200 2200 MHz Oscillator mechanical as sembly 11 5 48 Install AGC mounting bracket 9 with AGC Circuit Board 10 to 1200 2200 MHz oscillator mechanical as sembly 11 figure 5 48 Attach two 5 16 Phillips screws 7 and two lockwashers 8 to AGC mounting bracket 9 figure 5 48 Attach all of the tagged coax cables necessary to the AGC Circuit Board 10 figure 5 48 Solder two tagged wires to feed through on 1200 2200 MHz Oscillator assembly 11 one wire from AGC Circuit Board 10 the other wire from bracket mounted connector 30 figure 5 48 Install Heterodyne Amplifier 2 Pre scaler mechanical assembly 5 to Up per Floor 6 figure 8 Attach two Phillips screws 2 two lockwashers 3 two spacers 4 which secure Heterodyne Amplifier 2 Prescaler mechanical assembly 5 to Upper Floor 6 figure 5 48 Install tagged coax cables and solder wires to feed through capacitors at Heterodyne Amplifier 2 Prescaler mechanical assembly 5 5 48 Attach two Phillips screws 1 and two washers 2 which secure Upper Floor Assembly 3 to frame support members 4 and 129 figure 5 46 5 175 TM 11 6625 3016 14 j 5 176 MM 100 Multimeter 1 Case Reassembly
265. hooting sheet 3 of 4 5 39 TM 11 6625 3016 14 ISOLATE PROBLEM REPAIR RE PLACE AS NECESSARY Figure 5 4 Audio frequency monitor troubleshooting sheet 4 of 4 5 40 REMOVE A1A13 BOARD FROM EXTENDER BOARD CHECK FOR CON TINUITY FROM PIN F TO PIN 12 OF EXTENDER BOARD USING OHMMETER YES REMOVE A1A13 BOARD FROM EXTENDER BOARD CHECK FOR CON TINUITY FROM PIN 3 TO PIN 12 OF EX TENDER BOARD USING OHMMETER YES A1A13 BOARD IS BAD PLUG A GOOD A1A13 BOARD INTO THE EXTENDER BOARD SH 1 USE OHMMETER TO ISOLATE PROBLEM REPAIR OR RE PLACE AS NECESSARY PLUG A1A13 BOARD INTO EXTENDER BOARD SH 1 TM 11 6625 3016 14 Table 5 5 Receiver Troubleshooting Initial Conditions Control Setting INTENSITY As required EXT V DIV 15 KHz EXT V DIV Vernier CAL AC OFF DG DC SWEEP 1mS SWEEP Vernier CAL MODULATION FREQ Hz 0000 0 INT MOD OFF OFF VERT Midrange ANALY DISPR OFF HORIZ Midrange 1 5 5 15 KHz 15 AM FM AM BFO OFF OFF FREQUENCY MHz 0000000 VOL Fully ccw INT MOD RCVR RCVR SQUELCH Fully ccw DEV PWR SIG GEN RCVR RCVR RCVR WIDE MID NARROW NARROW RF LEVEL BFO INJECTION 10 HI LBL uV x 100 NORM NORM PWR OFF BATT PWR Table 5 6 1st and 2nd Local Oscillators Sheet 1 of 9 Reading Meaning FL Frequency of 2ND local oscillator determined by value of four rightmost thumbwheels of FREQUENCY MHz subtracted from 1080 0000 MHz 1080 0000 XXX
266. i Pa Nee CRI TO 58 FRONT PANEL SIDE REVERSE SIDE 123456789 10 ABCDEFHJ JKLMNPRSS li 12 13 14 15 Figure 5 27 250 kHz I F monitor audio circuit board A1A13 component location diagram 1 11 0625 3016 14 RE 14 H J K LM N P R D A B t N N a c COMPONENT SIDE TO FRONT PANEL 4 D E P 21 SIDE REVERSE ie ide and power supply A I 28 Figure 5 137 TM 11 6625 3016 14 J FLI J2 Figure 5 29 1080 MHz multiplier amplifier A1A15 component location diagram Figure 5 30 1200 MHz diode switch A1A16 component location diagram 5 138 TM 11 6625 3016 14 Figure 5 31 Power monitor Al A1A17 component location diagram 5 139 TM 11 6625 3016 14 A A 8J1 Figure 5 32 Spectrum analyzer A1A18 component location diagram 5 140 TM 11 6625 3016 14 9 Figure 5 33 Spectrum analyzer module 1 A1A18A1 component location diagram pU 9 R30 AT n cii i i RS FRONT PANEL D R4 Bm Figure 5 34 Spectrum analyzer module No 2 A1A18A3 component location diagram 5 141 TM 11 6625 3016 14 R7 R3I D rs S R40 R57 __ R63 n ENS Figure 5 35 Oscil
267. ies must have power level at least 25 dBm below that of the selected frequency NOTE The test point is located in the center of the left hand enclosure end cover of the High Frequency Multiplier Mixer A1A26 as viewed from the front panel Insert the High Frequency Multi plier Mixer sniffer refer to Table 5 1 into the indentation TM 11 6625 3016 14 Table 5 6 1st and 2nd Local oscillators Sheet 3 of 3 Reading Meaning SWITCHING VOLTAGES V C O Tuner Circuit Board FOR F A1A11P 1 A1A26P 4 High Freq INPUTS OUTPUT Mult Mixer F Pin Pin Pin 11V at 11V 1 9 3 Pin No Pin No 1100 MHz OV OV OV 10 1 1300 MHz Ov OV 5V 11 2 1500 MHZ Ov 5V OV 12 3 1100 MHz OV 5V 13 4 1900 MHz 58V OV 11 5 20V CHARACTERISTIC CURVE OF 1200 2200 MHz OSCILLATOR RELATIONSHIP BETWEEN VCO AND eos AT I 2 7 l ma a h 1200 74007 316007 1299 179 3 1800 2000 VER Al MERE 2192 1599 9 Gacy LEFTMOST 9 1 2 3 Ta 6 7 8 9 DIGIT OF FREQUENCY MH THUMBWHEELS RELATIONSHIP BETWEEN Vvco AND Operating open loop as in troubleshooting the voltage will be one of two possible values for each range If F is below will go to the largest negative value of the range in an effort to raise If is above Fvco will go go to the smallest negative value for the
268. indication is read on the bottom scale OHMS The fuse protects the OHMS function only 1 V dc is present at the IN PUT connector An operational amplifier feed back system provides accurate center scale reading d The DC position of the FUNCTION control allows negative dc voltages to be measured This position reverses the polarity of the INPUT connector by switching the center conductor to meter ground and switching the shield to an input amplifier DC is applied to the meter driver through the loading resistors selected by the posi tion of the RANGE switch 1 300 V full scale Maximum input is 300 V dc either directly or with the probe in the x1 position Maximum input is 800 V dc using the probe in the x10 position DC voltages are read on the top or second scale depending on the value of full scale deflection as determined by the position of the RANGE con trol 120 FROM IND MIXER FILTER TO Q LOCK ON SPECTRUM ANALYZER CIRCUIT BOARD 2 FROM LOCK ON SPECTRUM ANALYZER CIRCUIT BOARD 2 25 MHz XTAL FILTER 30 kHz BANDPASS 25 MHz MIXER 145 MHz 5 MHz V C O OSCILLATOR VARACTOR TUNED LOCKING BIAS 25 MHz TM 11 6625 3016 14 1 MHz TO LOG AMPL MIXER ON SPECTRUM ANALYZER BOARD 2 26 MHz XTAL OSCILLATOR SWEEP SIGNAL APPROX 18 Hz TO SPECTRUM ANALYZER CIRCUIT BOARD 2 THEN TO OSCILLOSCOPE MAIN CIRCUIT BOARD S A HORIZONTAL DIF FERENTIAL AMPLIFIER
269. ing RCVR WIDE MID NARROW switch to MID or NARROW setting When monitoring FM signals the NAR ROW setting of RCVR WIDE MID NARROW switch will not accommodate greater than 5 kHz FM deviation of most FM transmitters If FM devia tion is more than 5 kHz place RCVR WIDE MID NARROW switch to MID position NOTE Ensure that proper bandpass width has been selected on RCVR WIDE MID NARROW switch Too high a bandpass will cause higher noise reading Too low a bandpass will cause distortion Fine tune the receiver to center frequency within 100 Hz as follows a If FREQ ERROR meter appears centered at zero proceed to step 6 b if meter needle is not centered increase or decrease settings of FREQUENCY MHz thumbwheels in 10 kHz and 1 kHz steps to renter needle as closely as possi ble to zero then proceed to step 6 b b Rotate 1 5 5 15 KHz control to 5 KHz position If FREQ ERROR meter remains centered at zero proceed to step 6 c if meter needle deviates from zero increase or decrease settings of FREQUENCY MHz thumbwheels in 1 kHz steps to center needle as closely as possible to zero then proceed to step 6 c Illustration 7 2 A d a RCVR WIDE MID NARROW FREQ ERROR _ SQUELCH OFF Cent TM 11 6625 3016 14 Table 4 10 Receiver Operating Instructions Continued Procedure Illustration c Rotate 1 5 5 15 KHz control to 1 5 KHz position Increase or decrease
270. is reserved to change the published specifications of the equipment at any time and to furnish merchandise in accordance with current specifications without incurring any liability to modify equipment previously sold or to supply new equipment in accordance with ear lier specifications except the classification of special apparatus TM 11 6625 3016 14 b Service 1 When requesting service the origina tor shall give IFR information concerning the na ture of the failure and the manner in which the equipment was used when failure occurred Type model and serial number should also be provided 2 Do not return any products to the fac tory without first receiving authorization from the factory Customer Service Department CONTACT IFR Inc 10200 W York St Wichita Kansas 67215 USA ATTN Customer Service Depart PHONE 800 835 2350 Customer Service Only TWX 910 741 6952 3 Unless otherwise specifically request ed packaging for a return shipment shall be in the original container and packaging material If the original container and material are not available information as to suitable packaging techniques will be provided by the IFR Shipping Department 4 Returned material claimed defective but found to meet all previously applicable speci fications will be subject to a minimum evaluation charge consisting of the labor charges involved in the status determination of the material 5 Returned
271. ity and focus of the crt trace c Vertical inputs to the crt are derived by the oscilloscope Main Circuit Board figure 6 30 from either the input to the SCOPE IN connector or from the 15 6 1 5 KHz positions of the EXT V DIV control For internal modulation AM modula tion is applied to the Main Circuit Board from the 250 kHz Intermediate Frequency on the 250 kHz 1 F Monitor Audio Circuit Board figure 6 21 and frequency deviation is applied to the Main Circuit Board from the FM audio output of the 250 kHz I F Monitor Audio Circuit Board When using the oscilloscope as a general purpose test instrument to measure external inputs applied through the SCOPE IN connector the EXT V DIV Control must be in the 01 1 V DIV 1 V DIV or 10 V DIV position The EXT V DIV vernier control reduces the signal amplitude when it is not in the CAL position The Main Cir cuit Board applies the signals derived from either the SCOPE IN connector or the 15 6 1 5 KHz positions of the EXT V DIV control to the crt to control the vertical position of the trace These inputs to the crt are either ac or dc coupled The VERT control adjusts the vertical position of the crt trace d Horizontal inputs to the crt derived from the internal sweep according to the position of the SWEEP control The internal sweep comes from the internal sweep generator on the Main Circuit Board When the SWEEP control is fully ccw the sweep frequency equals the tone
272. ives and incendiary devices Use these items only when the need is urgent 4 Explode Use explosives to com plete demolition or to cause maximum destruc tion when time does not permit demolition by other means Powder charges fragmentation gre TM 11 6625 3016 14 nades or incendiary grenades may be used Place the explosive charges against the front panel of the AN GRM 114 to cause maximum destruc tion the second most effective location is against the top of the case of the AN GRM 114 Incen diary grenades usually are most effective if destruc tion of small parts and wiring is desired 5 Dispose Bury or scatter the des troyed parts in slit trenches foxholes or throw them into streams 5 177 5 178 blank 11 6625 3016 14 y 1 d 119 120 121 549 118 1 7 4 27 2 a lt Q 14 7 13 gt 108 110 i gt CT Figure 5 46 AN GRM 114 disassembly reassembly diagram 5 179 5 180 blank TM 11 6625 3016 14 Figure 5 47 Front panel disassembly reassembly diagram 5 181 TM 11 6625 3016 14 Figure 5 48 Upper floor disassembly reassembly diagram 5 182 TM11 6625 3016 14 Figure 5 49 MM 100 multimeter disassembly reassembly diagram 5 183 5 184 blank TM 11 6625 3016 14 CHAPTER 6 SCHEMATIC DIAGRAMS This chapter contains the schematic diagrams for Test Set AN GRM
273. l 44 figure 5 47 Remove AM FM switch and terminal lug from Front Panel Tag and unsolder wires from BFO switch 102 figure 5 47 Remove hex nut and flat washer which secure BFO switch to Front Panel 44 figure 5 47 Remove BFO switch and lockwasher from Front Panel Tag and unsolder wires from EXT MOD jack 103 5 47 Remove hex nut and flat washer which secure EXT MOD jack 103 to Front Panel 44 figure 5 47 Remove jack and lock washer from Front Panel 82 83 84 85 86 87 88 89 90 91 92 93 94 95 Tag and unsolder wires from EXT ACC jack 104 at rear of Er rent Panel 44 figure 5 47 Remove hex nut and lockwasher at rear of Front Panel 44 which secure jack to Front Panel 44 figure 5 47 Remove EXT ACC jack from Front Panel Tag and unsolder wires fro m INT MOD OUT jack 105 at rear of Front Panel 44 figure 5 47 Remove hex nut and lockwasher at rear of Front Panel 44 which secure jack 105 to Front Panel 44 figure 5 47 Remove INT MOD OUT jack from Front Panel Use an Allen wrench to loosen socket head screws which secure INT MOD knob 106 and 1 KHz INT MOD knob 108 to control shafs 5 47 Remove knobs 106 108 from control shafts Tag and unsolder wires from INT MOD and 1 KHz INT MOD controls at rear of Front Panel 44 5 47 Remove hex nut and flal washer which
274. l as follows NORM position RF BFO output level is equal to setting of RF LEVEL BFO INJECTION dial uV microvolts or dBm decibels referenced to 1 milliwatt scale 4 1 TM 11 6625 3016 14 out NS LA we 4 T Hi ON FREQ ROM NA Khu oB FM AM 000 5 5 1 DEVIATION n 018 EP sen Sa xe 12 4 bid eee ie O o S f HP 100 0 xio ec 2 TION 1 RANGE FUNCTION AC LOAD 32 SINAD B 150 NORM Bw HONE AN GRM 114 controls Figure 4 1 pu HCVR 10M 3 REF OUT CAL PWR OFF BATT indicators and connectors TM 11 6625 3016 14 Table 4 1 AN GRM 114 Controls Indicators and Connectors Continued Control indicator or connector HI LVL UV x 100 NORM switch Continued ZERO RCVR adjustment RF LEVEL BFO INJECTION dial AUTO OFF ZERO BATT switch Function x 100 position RF BFO output level is 100 times the RF LEVEL BFO INJECTION dial setting on the UV scale Equivalent level in dBm is equal to reading of dBm scale plus 40 db LVL position Enables RF output levels above
275. lected Spectrum Analyzer Display of High Frequency frequencies must have power level at least 25 dBm below that Multiplier Mixer of the selected frequency Test Point NOTE The test point is located in the center of the left hand enclosure end cover of the High Frequency Multiplier Mixer A1A26 as viewed from the front panel Insert the High Frequency Multi plier Mixer sniffer refer to a into the indentation E SWITCHING VOLTAGES V C O Tuner Circuit Board FOR Fc A1A11P 1 A1A261P 4 High Freq INPUTS OUTPUTS Mult Mixer Fc Pin Pin Pin 11V at 11V at 2 2 3 Pin No Pin No 1100 MHz oy OV OV 10 4 1300 MHz ov ov 5V 11 2 1500 MHz OV 45V OV 12 3 1100 MHZ gy 45V 45V 13 4 1900 MHZ OV W 14 5 5 66 TM 11 6625 3016 14 Table 5 8 1st and 2nd Local Oscillators Sheet 3 of 3 Reading RELATIONSHIP BETWEEN Vvco AND Fvco Meaning 20V CHARACTERISTIC CURVE OF 1200 2200 MHz OSCILLATOR p T aan 1 F 1300 1400 1600 1800 2000 vco 1299 1599 1799 1999 2199 F Remi LEFTMOST 0 1 2 3 45 6 7 8 9 DIGIT OF FREQUENCY MH THUMBWHEELS RELATIONSHIP BETWEEN Vyco AND Fyco Operating open loop as in troubleshooting the voltage V will be one of two possible values for each range If F is below VCO will go to the largest negative value of the range in an effort to raise If F Lis above VCO VCO will go to
276. line oscillates perform steps 17 and 18 if the tune line is not centered perform step 18 17 On 1200 2200 MHz Oscillator A1A3 A2 adjust A1A8A2A1R1 so that the tune line does not oscillate when vary ing A1A11R3 through the entire range of adjustment 18 Adjust A1A11R3 so that the tune line is centered on the center hori zontal line 19 Disconnect the test leads from 1 A11TP1 and ground the coaxial cable from theSMB adatcr and SCOPE IN connector plug A1A9A3 from the tee adapter and the SMB tee adapter from A1A913 20 Connect plugs A1A9P3 A1A3A2P4 and A1A3A3P1 to jacks A1A9J3 A1A3A2J4 and A1A3A3J1 respect ively 21 Remove all power from the AN GRM 114 and reassemble c High Frequency Multiplier Mixer A1 A26 Alignment High Frequency Multiplier Mixer A1A26 is aligned using the following procedure 1 Make sure the power cord is dis connected 2 Remove fuse A1A8F3 from AN GRM 114 lo 11 12 13 14 TM 11 6625 3016 14 Disassemble the AN GRM 114 to gain access to High Frequency Multi plier Mixer A1A26 and remove the A1A26 assembly Connect the extender cable between jack A1A26J4 and plug A1A26P4 Connect the AN GRM 114 115 volt or power cord to a 115 volt ac source Insert the high frequency sniffer to the center of the A1A26 assembly Apply power to the AN GRM 114 Set the spectrum analyzer controls for a center frequency of 1600 MHz and a 0 r
277. loscope main circuit board A1A18A4 component location diagram 5 142 TM 11 6625 3016 14 Figure 5 36 1st mixer A1A19 component location diagram 5 143 TM 11 6625 3016 14 AIA20J8 PINS Figure 5 37 2nd mixer A1A20 component location diagram 5 144 TM 11 6625 3016 14 Figure 5 38 100 MHz filter A1A21 component location diagram JI J3 Figure 5 39 100 MHz 108 MHz mixer A1A24A1 component location diagram 5 145 TM 11 6625 3016 14 0 h i REAR VIEW J amp FINS OO Figure 5 40 120 MHz receiver A1A24A2 component location diagram 5 146 TM 11 6625 3016 14 J9 PINS AIA24A3 FL3 Figure 5 41 FM AM generator A1A24A3 component location diagram 5 147 TM 11 6625 3016 14 Figure 5 42 Relay driver A1A25 component location diagram Figure 5 43 High level amplifier A1A28 component location diagram 5 148 TM 11 6625 3016 14 1 26 4 FLI FL5 FL3 FL4 FL2 J3 REF JI Figure 5 44 High frequency multiplier mixer A1A26 component location diagram 5 149 061 6 ve 3 2 Te LES 96 02 gt 82 O C33 P eS 2324 r ee E Ne pon ve 42 E TN Pen j ER Yid NYE ey yaa 2 E o m 22 moO JE ITUETA 1
278. low chart Set switches on the AN GRM 114 according to tables 5 3 5 4 only when these tables are referenced within the flowchart Any dashed num ber located inside a connector circle refers to a figure number within the troubleshooting section of paragraph 5 6 Figure 5 1 is an example of the application of flowchart symbols Refer to this figure when necessary Table 5 2 Glossary of Abbreviations Sheet 1 of 2 Abbr Definition Ampere alternating current adjust amplitude modulation amplifier antenna assembly attenuator board battery beat frequency oscillator circuit clockwise counterclockwise Cathode ray tube decibel decibel referred to 1 milliwatt direct current duty cycle regulator deviation division external frequency modulation frequency generate generator heterodyne amplifier height horizontal Hertz inject injection internal kilohertz local oscillator milliamp millisecond millivolt TM 11 6625 3016 14 Table 5 2 Glossary of Abbreviations Sheet 2 of 2 Abbr Definition maj major min minor MHz megahertz modulation NLT not less than NMT not more than norm normal OSC oscillate oscillator P C B printed circuit board P P peak to peak rf radio frequency rms root mean square SA spectrum analyzer sig signal tcxo temperature compensated crystal oscillator T p test point uV microvolt volts alternating current V C O voltage
279. ls indicated on the Meter require connection to the INPUT jack except AM modulation which is an internal connection DE MOD connector TM 11 6625 3016 14 Indicators and Connectors Continued Function Provides visual display of peak FM frequency deviation input power at TRANS RCVR and received signal strength as follows KHz positions Selects full scale range for peak FM deviation as dis played by DEVIATION KHz WATTS meter WATTS positions Selects multiplier for out put power measurements on WATTS scale of DE VIATION KHz WATTS meter SIG position For signals received off the air representation of rela tive signal strength can he determined by observing DEVIATION KHz WATTS meter needle de flection As signal strength increases the meter needle deflection will increase towards right of meter scale Mechanical zero adjustment of DEVIATION KHz WATTS meter intended for use when power is off Provides visual display of external ac voltage ex ternal dc voltage peak AM modulation 96 dis tortion of received generated signal and exter nal resistance Provides a demodulated signal from an rf input signal that is read on meter when DE MOD jack is connected to INPUT jack TM 11 6625 3016 14 Table 4 1 AN GRM 114 Controls Indicators and Connectors Continued Control indicator or connector Function FUNCTION control AC LOAD positions Provides ac resistance in
280. ltage set FUNCTION control to or DC depending on voltage to be measured Illustration FUNCTION 4 75 TM 11 6625 3016 14 Table 4 22 Multimeter Operating Instructions Continued Step Procedure Illustration 12 Disconnect 2 ended BNC cable 13 Connect multimeter probe to INPUT connector 14 Set RANGE control to the VOLTS position which gives the best meter reading on either the top or second scale depending on VOLTS position When no longer measuring re sistance remove FUNCTION control from OHMS only position Placing multimeter probes across large voltages when in OHMS only position will blow multimeter fuse TM 11 6625 3016 14 Table 4 22 Multimeter Operating Instructions Continued Step Procedure Illustration 15 To measure resistance set FUNCTION control to OHMS only 16 Connect multimeter probe across resistance to be measured 17 Set RANGE control to the OHMS tion which gives the best meter reading on OHMS scale 4 77 TM 11 6625 3016 14 Table 4 22 Multimeter Operating Instructions Continued Step Procedure Illustration 18 Emergency operating procedures Refer to the emergency operating procedures in step 9 of table 4 10 and in table 4 2 19 Stopping procedures a Refer to the stopping procedures in table 4 2 b Disconnect BNC cable from INPUT connector of multimeter and INT MOD OUT connector
281. material not accompanied by statement of claimed defects may be returned at the originator s expense 6 All freight costs on non warranty ship ments are assumed by the customer 7 Any departure the above instruc tions without specific factory authorization can be considered a breach of warranty and all ex penses incurred as a result will be billed to the originator 1 13 Safety Precautions Listed below are several important safety precautions which must be ob served during all phases of installation and opera tion IFR Inc assumes no liability for customer s failure to comply with any of the safety precau tions outlined in this manual Complying with Instructions Installa tion operating personnel should not attempt to install or operate AN GRM 114 without reading and complying with all instructions contained in this manual All procedures contained in this man ual must be performed in exact sequence and man ner described b Grounding Requirements To minimize shock hazard chassis and case of AN GRM 114 must be connected to an electrical ground The unit is furnished with an ac and dc power cable each of which incorporates a ground pin for this purpose The ac power cable is equipped with a standard 3 pin grounded plug on one end which must be connected only to a properly grounded 3 pin wall receptacle WARNING Due to potential safety hazards use of three prong to two prong adapter plug is not rec
282. mbly requires calibra VCO Tuner requires alignment repair of module requires VCO Tuner lower floor assembly requires calibra repair of module requires alignment of Multiplier Mixer assembly repair of module requires alignment of repair of module requires alignment of repair of module requires alignment of repair of module requires alignment of repair of module requires alignment of repair of module requires alignment of repair of module requires alignment D 10 TM 11 6625 3016 14 APPENDIX F PINOUT TABLE FOR EXT ACC CONNECTOR The below Provides pir assignments far vides power and signal sources for external ac the EXT Connector located front 9 d with the AN GRM el of the AN GRM 114 This connector pro 114 y equipment used with the 3 4 2 POWER SOURCES FEMALE 9 5 10 SIGNAL SOURCE MALE 8 7 EXT CONNECTOR Front View CONNECTOR PIN ASSIGNMENTS Power i Signal Source Source 12 V Microphone Keying Demodulated Signal Out Ground Signal Ground U S GOVERNMENT PRINTING OFFICE 1982 505 028 85 F 1 F 2 blank INE TEAR ALONG PERFOR ATED RECOMMENDED CHANGES TO EQUIPMENT TECHNICAL PUBLICATIONS 50 TANG FROM PENT YOUR UNIT S COMPLETE SDURESS Commanuer Stateside Army Depot ATUN AMS PA US Stateside 67705 nan ny 2 rule De 1 Wu WITH THIS PUBLICATION
283. measurement controls indicators and connectors 5 1 Flowchart symbol application AN GRM 114 performance test Power supply troubleshooting 5 4 Audio frequency monitor troubleshooting Receiver troubleshooting Oscilloscope and spectrum analyzer troubleshooting 5 7 Frequency error measurement troubleshooting signal generator troubleshooting 15 91 Dual tone generator troubleshooting RF wattmeter troubleshooting TCXO and output distribution amplifier troubleshooting MM 100 multimeter troubleshooting 5 13 Zero beat pattern Front panel A1A1 rear view component location diagram Mother board A1A2 component location diagram 5 16 Upper floor assemblies A1A3 component location diagram Transmitter sensor A1A4 component location diagram 108 MHz bandpass filter A1A5 component location diagram 5 19 1200 MHz amplifier A1A6 component location diagram Static discharge protector A1A7 component location diagram Rear panel A1A8 component location diagram 22 Duty cycle regulator A1A8A1 component location diagram High frequency phase lock loop A1A9 component location diagram 79 80 MHz loop A1A10 component location diagram 5 25 VCO tuner A1A11 component location diagram Dual tone generator Al Al 2 component location diagram 5 27 250 kHz 1 monitor audio circuit board A1A13 component location diagram mill 2 CO 425 ET ee 02 RIRIA Ino
284. mp socket at rear of Front Panel 44 figure 5 46 Remove lamp socket from rear of Front Panel 44 figure 5 46 Pull off green lamp cover 148 from INPUT LEVEL lamp on Front Panel 44 figure 5 46 Use a piece of tape to remove lamp from lamp socket 5 165 TM 11 6625 3016 14 112 113 114 115 116 117 118 119 120 121 j MM 100 Multimeter 1 5 166 Tag and unsolder wires from lamp socket at rear of Front Panel 44 figure 5 46 Remove lamp socket from rear of k rent Panel 44 figure 5 46 Pull off green lamp cover 149 from Power ON lamp on Front Panel 44 figure 5 46 Use a piece of tape to remove lamp from lamp socket Tag and unsolder wires from lamp soc ket at rear of Front Panel 44 5 46 Remove lamp socket from rear of Front Panel 44 figure 5 46 Pull off amber lamp cover 150 from 0 dBm lamp on Front Panel 44 fig ure 5 46 Use a piece of tape to remove lamp from lamp socket Tag and unsolder wires from lamp socket at rear of Front Panel Remove lamp socket from rear of Front Panel 44 5 46 Disassembly Loosen left hand 1 4 turn fastener which secures metal cover plate to MM 100 accessory compartment Re move cover plate Remove one 1 4 Phillips screw 1 and one washer 2 which secure bracket 3 to MM 100 case figure 5 49 Loosen 1 4 turn fastener which holds right hand
285. nals detected by the Power Monitor into dc voltages which are sent to the DEVIATION KHz WATTS meter for power measurements lt also switches the AN GRM 114 between the generate and receive modes 3 17 TM 11 6625 3016 14 BATTERY VOLTAGE PWR OFF BATT SW ERE TO DCR CIRCUITS I 11 V DC I REGULATOR DCR I amp 12 V DC re ena tas POWER SUPPLY 11 TO 28V 39 V DC PC BD FROM 35 V DC EXTERNAL DC SOURCE DC VOLTAGES TO DEVIATION BATTERY CHARGER 15 V DC CIRCUIT TO BATTERY RECTIFIER EL LL TO RELA Y DUTY CYCLE DRIVER REGULATOR PC BD TRANSFORMER Figure 3 12 Power supply block diagram 3 18 TM 11 6625 3016 14 CHAPTER 4 OPERATING A transmitter must only be nected to the TRANS RCVR con nector on the front panel of the AN GRM 114 Connecting a trans mitter to any other connector will severely damage the AN GRM 114 4 1 Operating Procedures Observe the following precautions when operating the AN GRM 114 When working with live circuits of high potential keep one hand in pocket or behind back to avoid serious shock hazard b Remove all jewelry or other cosmetic apparel before performing any test procedures involving live circuits Use only insulated troubleshooting tools when working with live circuits d For added insulation place rubber bench mat underneath all power
286. ncy as possible a Initially it is helpful to observe oscil lation of the waveform on the oscilloscope while rotating 10 MHz CAL adjustment adjust screw until oscillation diminishes to a point of being as close as possible to stationary b While observing DEVIATION KHz WATTS meter continue to adjust the 10 MHz CAL adjustment until meter needle oscillation is as slow as possible During this step recheck oscilloscope to be sure the waveform is stable Master oscillator is now calibrated in accordance with the time standard signal Illustration 10 MHz CAL 4 63 1 6625 3016 1 4 Table 4 18 Master Oscillator Calibration using Received Time Standard Signal Continued pne Procedure NOTE Cont Careful catibration caa result in a ocat frequency less than 0 1 Hz 1 When calibrating the master oscillator for frequency reference measure ment ine FREQ ERROR meter should also be zeroed foi voliable frequency measurements Procedure is as follows FREQ ERROR KHz a GEN RCVR switch to GEN NOTE WIDE MID NARROW switch must be in NARROW b Make sure AUTO OFF ZERO BATT switch is in AUTO re c Rotate 1 5 5 15 KHz control to 1 5 ZERORCVR r lt Khz GE N RCVR AU TO OFF ZERO BATT RCVR WIDE MID NARROW d Adjust ZERO RCVR adjustment cw or cew lo center FREQ ERROR meter needle at zero 8 Emer
287. nected figure 5 47 Unsolder wires from PWR OFF BATT switch 93 at rear of Front Panel 44 figure 5 47 Remove two hex nuts one washer and three solder lugs which secure switch 93 to Front Panel 44 figure 5 47 Remove switch and spacer from Front Panel Tag and unsolder wires from ZERO RCVR potentiometer at rear of Front Panel Remove hex nut 94 and flat washer which secure ZERO RCVR potentio meter to Front Panel 44 figure 5 47 Remove potentiometer and lock washer from Front Panel Tag and unsolder wires from GEN RCVR switch at rear of Front Panel 44 figure 5 47 Remove hex nut 95 and flat washer which secure GEN RCVR switch to Front Panel 44 figure 5 47 5 163 TM 11 6625 3016 14 5 164 53 54 55 56 57 58 59 60 61 62 63 64 65 66 Remove switch and lockwasher from Front Panel Tag and unsolder wires from RCVR WIDE MID NARROW switch at rear of Front Panel 44 figure 5 47 Remove hex nut 125 and flat washer which secure switch to Front Panel 44 figure 5 47 Remove switch and lockwasher from Front Panel 44 figure 5 47 Remove hex nut from rear of mount ing block Remove hex nut and lock washer which secure REF OUT jack 96 to Front Panel 44 figure 5 47 Remove REF OUT jack 96 from Front Panel Use an Allen wrench to loosen two Socket head screws in SQUELCH con trol knob
288. ng Upper Floor out Tilt Front Panel forward FREQ ERROR KHz Meter Frequency Select Switch Assembly FREQUENCY KHz Thumbwheels Case cast Case Swing Upper Floor out Tilt Front Panel forward Spectrum Analyzer Assembly Dual Tone Generator o o o o mor O ao Module removal steps 5 155 TM 11 6625 3016 14 Module to be removed SCOPE IN connector 1 5 5 15 KHz control CAL adjustment Phase Lock Lamps INPUT LEVEL lamp ON lamp O dBm lamp MM 100 Multimeter Circuit Board 5 156 Table 5 13 Disassembly Sequence Continued Module disassembly steps i 100 101 i 102 109 110 113 114 117 i 118 121 Modules which must be removed first Case Disconnect coax cable from SCOPE IN connector Case Swing Upper Floor out Tilt Front Panel forward Spectrum Analyzer Assembly Case Case Swing Upper Floor out Tilt Front Panel forward FREQ ERROR KHz Meter Case Swing Upper Floor out ANT INPUT connector Case PWR OFF BATT Switch Case Speaker Remove MM 100 case from AN GRM 114 case MM 100 Composite Assembly Module removal steps C Case Removal 1 Unlock two latches which lock multi meter case to AN GRM 114 case Slide multimeter case off AN GRM 114 case 2 Remove Phillips screws and four washers which secure black rectan gular frame to four standoffs on rear panel
289. ng bracket 30 39 Attach tagged coax cables to 108 MHz Band pass Filter 71 figure 5 46 Frame Support Member Reassembly 1 Install High Frequency Multiplier Mixer 51 to mounting bracket 30 5 46 2 Use an Allen wrench to attach four socket head screws which hold the High Frequency Multiplier Mixer 51 to 1200 MHz Diode Switch High Frequency Multiplier Mixer mounting bracket 30 5 46 NOTE Install Battery Fuse on back of Rear Panel 3 Plug mating connector into connector on assembly 51 figure 5 46 4 Solder wires to assembly 51 figure 5 46 b Install tagged coax cables to assembly 51 figure 5 46 6 Insert capacitor 7 through mounting clamp 5 Tighten slotted screw in mounting clamp figure 5 46 7 Install 1200 MHz Diode Switch 49 to mounting bracket 30 figure 5 46 8 Solder wire to feed through capacitor 9 Install tagged coax cables 10 Attach two Phillips screws 50 which hold straps for tagged coax cables figure 5 46 TM 11 6625 3016 14 11 Install tagged coax cables to 1200 MHz Diode Switch 49 figure 5 46 12 Use an Allen wrench to attach two 5 8 socket head screws 47 and two spacers 48 which hold 1200 MHz Diode Switch 49 to 1200 MHz Diode Switch High Frequency Multiplier Mixer mounting bracket 30 figure 5 46 13 Install First Mixer o to frame support member 25
290. ns for the multimeter using signals generated by the AN GRM 114 TM 11 6625 3016 14 Table 4 22 Multimeter Operating Instructions Illustration Step k oceque Do not exceed 300 V into the multimeter INPUT connector 1 Connect the multipronged cable which is built into the multimeter to the EXT ACC connector 2 Connect the 2 ended BNC cable between the INT MOD OUT connector and the multimeter INPUT connector QAN SSN a 7 M ds APA INT MOD OUT TM 11 6625 3016 14 Table 4 22 Multimeter Operating Instructions Continued Procedure Illustration 3 To apply power to the AN GRM 114 refer to the instructions in paragraph 4 3 4 To generate a signal refer to the in structions tables 4 3 4 4 4 8 and 5 To measure ac voltage of the generated signal set FUNCTION control to HI Z Set RANGE control to the VOLTS position which gives best meter read ing top or second scale depending on VOLTS position Rotate INT MOD OFF control to vary voltage R ANGE METER FUNCTION NOTE The multimeter measures dis tortion of 1 kHz signals only 6 To measure distortion of the generated signal set RANGE control to the DIST position which gives best meter reading top or second scale depending on the DIST position TM 11 6625 3016 14 Table 4 22 Multimeter operating Instructions Continued Illustration Step
291. nut to rear of Front Panel 44 which holds TRANS RCVR con nector 92 to Front Panel 5 47 Connect coax conrectors to Dial Attenuatol Assembly 91 then in stall Assembly to Front Panel 44 figure 5 47 Install dial index attenuator ring 90 to Front Panel 44 figure 5 47 Attach one 1 4 Phillips screw which holds dial index attenuator ring 90 to Front Panel 44 figure 5 47 Secure dBm Dial 128 to shaft of Dial Attenuator Assembly 91 with hex nut 127 figure 5 47 73 74 75 76 77 78 79 80 81 82 83 84 85 86 Secure dial attenuator stop 89 to dBm Dial 128 with two 1 4 Phillips screws 5 47 Attach knob 88 figure 5 47 Use an Allen wrench to attach two 1 4 socket head screws 87 to BFO INJECTION knob 88 5 47 Attach AUTO OFF ZERO switch 86 hex nut and washer figure 5 47 Solder wires to rear of switch Attach hex nut and flat washer to AUTO OFF ZERO BATT switch 86 on Front Panel 44 j figure 5 47 Attach HI LVL uV x 100 NORM switch 85 lockwasher hex nut and flat washer figure 5 47 Solder tagged wires to rear of switch Solder wire to ground lug on back of Front Panel 44 5 47 Install terminal lug to shaft of HI LVL uV x 100 NORM switch 85 Insert shaft through rear of Front Panel figure 5 47 Attach hex nut and flat washer to
292. o Upper Floor 6 figure 5 48 11 Remove two hex nuts 16 one lock washer 17 and one ground lug 18 which secure TCXO mounting bracket 15 to TCXO Master Oscillator 13 figure 5 48 12 Remove TCXO 13 from mounting bracket 15 figure 5 48 13 Disconnect Connector 14 from TCXO 13 14 Tag and disconnect coax cable from 13 5 48 15 Tag and unsolder wire from feed thru capacitor of TCXO Output Distribu tion Amplifier 21 figure 5 48 16 Tag and disconnect coax cables from assembly 21 figure 5 48 17 Remove two 1 4 Phillips screws 19 and two lockwashers 20 which se cure assembly 21 to Upper Floor 6 figure 5 48 18 Disconnect mating connector from connector 23 on clock divider 22 figure 5 48 19 Tag and disconnect coax cables from assembly 22 20 Remove two 1 4 Phillips screws 24 two lockwashers 25 and two flat washers 26 which secure assembly 22 to Upper Floor 6 5 48 5 157 TM 11 6625 3016 14 e Removal of Assemblies from Frame Support Members 5 158 1 Remove two 3 8 Phillips screw 23 which secure Second Mixer Assembly 24 to frame support member 25 2 Remove assembly 24 from frame support member 25 figure 5 46 3 Unplug mating connector from con nector 26 on assembly 24 5 46 4 Tag and disconnect coax cables from assembly 24 5 46
293. olt rechargeable lead acid battery The internal battery is kept charged by means of an internal cur rent regulated charger circuit The charger circuit is energized whenever the AN GRM 114 ac power cord is connected to an active ac outlet The charger circuit is energized even when the AN GRM 114 is turned off The internal battery may be charged by applying 14 to 16 V dc from an external source to pin 11 of the rear panel power jack The negative terminal of the external source should be connected to pin 10 of the rear panel power jack Used as a receiver refer to paragraph 3 2 the AN GRM 114 permits the technician to monitor and measure the characteristics of CW AM FM and SSB signals from 300 0 kHz to 999 9999 MHz The FREQUENCY MHz thumb switches on the front panel control the digital frequency synthesis circuitry refer to paragraphs and 3 6 which tunes the receiver to the se lected frequency The AN GRM 114 receiver fre quency is specified as accurate to within 00005 of the selected frequency Typically it is accurate to within 00002 The 10 MHz TCXO Master oscillator is principally responsible for main taining receiver frequency accuracy and stability The demodulated outputs of the receiver may be used to audibly monitor an applied signal deter mine its relative signal strength exact carrier or resting frequency and modulation characteristics An Intermediate Frequency IF representation of the re
294. om on ancd oif signal or using actual code characters keveu to the same rate or a Lille faster than the signal bem received 2 Modulated jamniing Modu lated jamming signals may consist of noise laughter singing music various tone Or almost any unusual sound or it may be a combination ofthesesounds Various types of modulated jamming signals are explained below a Spark This is one of the simplest most effective and most easily produced jamming signals This type of signal sounds very rough raspy and sometimes like an operating electric motor with sparking brushes Thesignalis very broad therf fore it willin terfere with a large number of com munication channels b Sweep through This signal is the result of sweeping or moving a carrier hack and forth at aslow or rapi rate Thenumerous signals of varyingamplitude and frequency TM 11 6625 3016 14 Cent 4 36 Table 4 10 Receiver Operating Instructions Continued Procedure produce a sound like that of a low flying airplane passing overhead This type of jamming is effective over a broad range of frequencies When it is varied rapidly it is effective against all types of voice signals c Stepped tones or bagpipes This signal usually consists of several separate tones The tones are transmit ted in the order of first increasing and then decreasing pitch repeated over and over The audible effect is like the sound of a Scottish b
295. ommended The dc power cable features a cigarette lighter adapter on one end Operating Safety Due to presence of po tentially lethal voltages within AN GRM 114 operating personnel must not remove test equip ment covers at any time Component replace ment and internal adjustments must be made qualified maintenance personnel only d Observing CAUTION and WARNING Labels Extreme care should be exercised when performing any operations preceded by a CAU TION or WARNING label CAUTION labels appear where possibility of damage to equipment exists while WARNING notes denote a condition where a shock hazard exists exposing personnel to possi ble bodily injury TM 11 6625 3016 14 CHAPTER 2 PREPARATION FOR USE AND INSTALLATION 2 1 Unpacking Refer to Figure 2 1 and para c for AN GRM 114 packaging a Position shipping carton with OPEN THIS END label facing up b Remove packing slip attached to top side of carton Use packing slip to confirm receipt of all goods as listed c Cut and remove white holddown straps from shipping carton d Cut tape along top 3 edges of carton to open lid e Remove WARRANTY INFORMATION PACKET from carton f Remove top packing mold from carton g Unwrap polyethylene sheeting from top of canvas carrying case h Carefully lift canvas carrying case from carton by handle and remove polyethy lene sheeting and bottom packing mold i Unzip carrying case and car
296. on positive dc voltage is measured The polarity of the INPUT connector is normal be cause the center conductor of the INPUT connec tor is switched to the input amplifier and the shield is switched to meter ground DC is applied to the meter driver through loading resistors se lected by the position of the RANGE control 1V 300 full scale Maximum input is 300 V dc either directly or with the probe in the x1 posi tion Maximum input is 800 V dc using the probe in the x10 position DC voltages are read on the top or second scale depending on the value of full scale deflection as determined by the setting of the RANGE control f Input loading for ac voltages occurs through impedance matching circuits There are five different AC LOAD positions for these cir cuits HI Z 1 M Q 3 2 Q The position of the RANGE control selects the range of full scale deflection 1V 300 V For direct input 300 V ac is maximum input 600 V ac is maximum in put using the probe in the x10 position The fre quency range is 25 Hz to 25 kHz with the probe Input ac voltages are rectified and passed to the meter driver The dB scale red scale is provided for ac reference measurements When the RANGE control is in the SINAD position the SINAD scale blue scale is calibrated in dB below 10096 distortion The FUNCTION control should be in the AC LOAD positions as required SINAD measurements use a 1 kHz tone 50 mV 22V rms Internal A
297. or always generates a 120 MHz signal This signal is phase locked to the TCXO through a 10 kHz signal from the Clock Dividek figure 6 9 The Dual Tone Gen erator figure 6 20 an audio signal to the FM AM Generator applying either AM or FM mod ulation to the 120 MHz signal depending on the position of the AM FM switch This modulated 120 MHz signal is crossfed to the 2nd Mixer fig ure 6 33 The crossfeed diode switch in the 2nd Mixer allows a signal path through the 2nd Mixer to the 120 MHz Receiver and the Spectrum Analy TM 11 6625 3016 14 10 KHe FROM CLOCK DIVIDER 120 MHz FROM 2ND VARIABLE LOCAL DUAL TONE ATTENUATOR OSCILLATOR GENERATOR IBFO INJECTION OIAL 1200 MHz AMPL FROM 1ST LOCAL OSCILLATOR 2 D MIXER Ir 73 LASSEMBLY _ _ J POWER MONITOR RELAY HI LEVEL AMPLIFIER SPECTRUM ANALYZER RECEIVER TRANSMITTER SENSOR OSCILLOSCOPE TO TRANS RCVR CONNECTOR 250 kHz LF MONITOR AUDIO CIRCUIT BOARD VOLUME SPEAKER CONTROL Figure 3 3 Generate block diagram 3 5 TM 11 6625 3016 14 zer From there it follows the same path through the 120 MHz Receiver figure 6 37 and 250 kHz I F Monitor Audio Circuit Board as do received signals refer to paragraph 3 2a A second 120 MHz output of the FM AM Gen erator is applied to the variable attenuator RF
298. ormer 67 and one stand off figure 5 46 Removal of Assemblies from Front Panel Remove Phillips screws and lock washers which hold frame support members to Front Panel 44 fiqurel 5 46 Disconnect coax connectors from rear of TRANS RCVR 10 MHz REF OUT SCOPE IN and ANT INPUT coaxial jacks Tilt top of Front Panel forward to provide better access to rear of Front Panel 44 fiqure 5 46 Use an Allen wrench to loosen the two socket head screws located in control knobs 108 109 112 115 116 117 118 121 124 f figure 5 46 Remove knobs from control shafts Disconnect plug from jack 145 at tached to Spectrum Analyzer Assem bly 125 figure 5 46 Disconnect coax connector 144 fig ure 5 46 Remove hex nuts 110 113 119 132 and 134 which secure Spectrum Analyzer Assembly 125 to Front Panel 44 figure 5 46 Remove flatwashers 111 114 120 133 and 135 from control bushings figure 5 46 Remove two hex nuts 143 from screw 126 which secure Spectrum Analyzer Assembly 125 to frame support member 129 figure 5 46 Let screw 126 washer 127 and spacer 128 remain in Spectrum Analyzer 125 11 12 14 15 16 17 18 19 20 21 22 23 Lift Spectrum Analyzer Assembly 125 from AN GRM 114 5 46 Disconnect fifteen pin connector 1 A12P1 from Dual Tone Generator PCB 109 figur
299. peaker or external accessory speaker when connected to EXT SPKR connector Activates or deactivates internal beat frequency oscillator bfo Selects signal mode to be generated or received as follows AM position Generates or receives amplitude modulated AM signals FM position Generates or receives frequency modulated FM signals Output connector providing power or signal sources for external accessory equipment See Appendix D for connector pin assign ments Input connector for external modulation sources Output connector which couples dual tone gen erator audio output to external devices Output level is controlled by INT MOD OFF outer control and 1 kHz INT MOD OFF inner control TM 11 6625 3016 14 Table 4 1 AN GRM 114 Controls Indicators and Connectors Continued Control indicator or connector Function INT MOD OUT connector Continued NOTE Output can consist of one or any combination of following modulat ed signals mixed together 1 kHz internal modulation variable internal modulation and external modulation INT MOD OFF Controls of AM modulation or FM peak devia tion of frequency selected on MODULATION FREQ Hz thumbwheels Modulation control is OFF in full ccw detent position when out of detent rotate control cw to increase modula tion level NOTE Modulation frequency can be exter nally keyed through the EXT MOD connector 1 KHz INT MOD OFF con
300. pect P N 7010 2368 600 Test 1 8 17 24 36 Test gt 1 8 17 24 36 Replace 2 24 010205 MECH 55 CLOCK DIVIDER 4 Inspect P N 7026 2321 700 Test Test Replace 01020501 ASSY CLOCK DIVIDER 4 Test P N 7010 2309 300 Repair 010206 MECH ASSY TCXO OUTPUT DISTRIBUTION AMPLIFIER Inspect ALA3A5 Test 1 24 P N 2014 2362 000 Test 1 4 7 8 24 41 Replace a 24 01020601 ASSY TCXO OUTPUT DISTRIBUTION AMPLIEIR Test 2 1 4 7 8 24 A1A3A5A 24 P N 7010 2361 000 Replace 0103 MECH ASSY TRANSMITTER SENSOR 1 4 Inspect Visual P N 7005 2375 000 Test 2 2 3 4 7 8 20 24 Replace s 3 4 7 8 20 24 25 31 34 Replace HISA FM 2314 79 DRSEL MA Form 6031 1 Jul 76 TM 11 6625 3016 14 SECTION 11 MAINTENANCE ALLOCATION CHART TEST SEP hoo ANIGRM 114 2 4 E i 5 3 MAINTENANCE CATEGORY GROUP COMPONENT ASSEMBLY MAINTENANCE NUMBER FUNCTION 10104 MECH ASSY 197 MH BANDPASS FILTER ALAS inspect i P N 7018 7340 2090 Test 3 14 2 Test 3 4 14 24 Replace 24 I 10105 ASSY 1200 MHZ AMPLIFIER Inspect visual 7014 2355 400 Test 3 9 14 24 i Replace 24 1010501 ASSY 1200 MEZ AMPLIFI AlAFA1 Test 3 4 9 14 24 P N 7010 2354 920 Replace 2106 MELA ASSY STATIC DISCHARGE PROTECTIVE 7 P N 7022 0 360 200 Test Test Inspect Replace 0107 MECH ASSY REAR PANEL Inspect P N 7
301. perating Instructions Step Procedure Illustration 1 Set FREQUENCY MHz thumb wheels to desired rf frequency output 2 For an rf output less than 50 uV set LVL x 100 NORM switch to NORM and tate RF LEVEL BFO INJECTION dial to desired UV setting NOTE RI output in dBm is indicated by the reading on dBm scale The AN GRM 114 is now generating rf signals at desired frequency and output level RF LEVEL BFO INJECTION HI LVL HV X 100 NORM TM 11 6625 3016 14 Table 4 4 RF Signal Generator Operating Instructions Continued Step Procedure Illustration For an rf output level greater than 50uV but less than 5000 uV a Place HI LEVEL uV X 100 NORM switch to X 100 position b Rotate RF LEVEL BFO IN JECTION dial to desired setting The AN GRM 114 is now generating rf signals at desired frequency and output level NOTE RF output level in uV is now 100 times the setting of RF RF LEVEL BFO INJECTION HI LV L uV X 100 NORM LEVEL BFO INJECTION dial on uV scale Equivalent rf output level in dBm can be determined by mathematically adding 40 dBm to reading on dBm scale For an rf output level greater than 35 dBm a Place HI LVL uV X 100 NORM switch to HI LVL position b Slowly rotate RF LEVEL BFO INJECTION dial cw until 0 dBm Lamp lights c Record setting of RF LEVEL BFO INJECTION dial on dBm scale d Add result obtained in step 4 c
302. pment as nearly as possible to likenew condition in accord ance with original manufacturing standards Re build is the highest degree of material maintenance applied to Army equipment Rebuild reduces to zero the hours the equipment or component there of has been in use 3 Explanation of Format of Section ll Main tenance Allocation Chart The add columns in Section are as follows a Column 1 Group Number Column 1 lists group numbers the purpose of which is to identify components assemblies subassemblies and modules with the next higher assembly b Column 2 Component Assembly Col ume 2 lists the noun names of components as D 1 TM 11 6625 3016 14 semblies subassemblies and modules which maintenance is authorized C Column 3 Maintenance Functions Col umn 3 lists the functions to be performed on the item listed in column 2 d Column 4 Maintenance Category Col umn 4 specifies by the listing of a worktime figure in the appropriate subcolumn s the lowest level of maintenance authorized to perform the function listed in column 3 This figure represents the active time required to perform that main tenance function at the indicated category of main tenance If the number of complexity of the tasks within the listed maintenance function vary at dif ferent maintenance categories appropriate work time figures will be shown for each category The number of man hours specified by the work
303. purious signals to be generated and displayed by AN GRM 114 1 Connect signal stimuli to INPUT 4 connector or connect transmitter out put to TRANS RCVR connector 4 38 TM 11 6625 3016 14 Table 4 12 Spectrum Analyzer Operating Instructions Continued Procedure When applying power to the os cilloscope or spectrum analyzer from PWR OFF BATT switch or AC DC OFF switch make sure INTENSITY control is in moder ate left position Step 2 Adjust INTENSITY control cw and FOCUS control appropriately to obtain a sharp visible trace display NOTE Warmup time of crt is approxi mately 30 seconds from a cold startup trace display will not become visible until crt achieves warmup 3 Adjust FREQUENCY MHz thumbwheels so that desired signal is aligned along major vertical axis of crt Signal to be measured is now on center frequency Illustration INTENSITY CRT DISPLAY AC DC OFF PWR OFF BATT CRT DISPLAY FREQUENCY MHz 4 39 TM 11 6625 3016 14 Table 4 12 Spectrum Analyzer Operating Instructions Continued Step Procedure Illustration 4 Rotate ANALY DISPR OFF control Fully ccw short of detent position 5 Again adjust FREQUENCY MHz thumb wheels so desired signal is aligned along major vertical axis on crt TM 11 6625 3016 14 Table 4 12 Spectrum Analyzer Operating Instructions Continued Illustration st
304. qu EX Le ACTLY 5b RH SUPPLY e 5 104 Figure 1 1 PROBE FROGS i SISTANCE ADJUST on TAM dn oo BOARD FOR READING OF 30 kQ Ajit TE IS DISASS Y SSSEMBLY 5 INSTRUCTIONS TU REMOVE REMOVE BAD A1A2 ASSY AND INSTALL GOOD ONE NOTE 30 52 AND 300 k CALIBRA TION ADJUST MENTS INTERACT RECHECK 300 k CALIBRATION REMOVE PROBE FROM 30 k RESISTANCE 5 12 MM 100 multimeter troubleshooting sheet 3 of 10 REMOVE VOLT METER PROBE FROM OUTPUT OF POWER SUPPLY OBSERVING POL ARITY CONNECT MM 100 PROBE TO OUTPUT OF POWER SUPPLY READ MM 100 METER NO 515 V dc YES SET MM 100 RANGE SWITCH TO 30 VOLTS REMOVE MM 100 PROBE FROM POWER SUPPLY SH5 DISCONNECT MM 100 PROBE FROM POWER SUPPLY REFER TO DISASS EMBLY ASSEM BLY INSTRUCTIONS TO OPEN MM 100 RECONNECT MM 100 PROBE TO POWER SUPPLY ADJUST A2A1A1R83 FOR A READING OF EXACTLY 5 V dc 5 V dc YES Figure 5 12 MM 100 multimeter troubleshooting sheet 4 of 10 TM 11 6625 3016 14 5 105 TM 11 6625 3016 14 CONNECT DIGITAL VOLTMETER TO OUTPUT OF POWER SUPFLY 1 ADJUST POWER SUPPLY TOEX ACTLY 15 V dc 1 lm 3 OBSERVING POL CONNECT 100 PROBE OUTPUT
305. r oscillator FREQ ERROR KHz for accurate frequency reference d measurement the FREQ ERROR meter must be zeroed for reliable frequency measurements Procedure is as follows a Place GEN RCVR switch to GEN NOTE RCVR WIDE MID NARROW switch must be in NARROW b Make sure AUTO OFF ZERO BATT switch is in AUTO AUTO OFF ZERO BATT RCVR WIDE MID NARROW c Rotate 1 5 5 1 5 KHz control to 1 5 KHz d Adjust ZERO RCVR adjustment cw or ccw to center FREQ ERROR meter needle at zero 4 66 TM 11 6625 3016 14 Table 4 19 Master Oscillator Calibration using_an External Frequency Standard Continued Illustration Step Procedure 8 Emergency operating procedures For emergency operating procedures weakening refer tof table 9 Stopping procedures Disconnect power from AN GRM 114 as instructed 9 45 before disconnecting power from frequency counter Figure 4 7 Frequency error measurement controls indicators and connectors TM 11 6625 3016 14 Table 4 20 Initial Adjustments and Control Settings Figure 4 7 Reference Initial adjustment No Control indicator or connector or setting 1 GEN RCVR switch RCVR 2 RCVR WIDE MID NARROW NARROW 3 FREQUENCY MHz thumbwheel switches 0000000 4 AC DC OFF switch DC 5 EXT V DIV control 15 KHz 6 EXT V DIV vernier control CAL 7 AUTO OFF ZERO BATT switch AUTO 8 AM FM switch FM Table 4 21 Frequency Error Measurement Operating Ins
306. range When the High Frequency Phase Lock Loop is operating closed loop as in normal operation the value of V vco will correspond to a particular frequency based on the characteristic curve of the 1200 2200 MHz Oscillator When VCO is monitored using a tee connector while the leftmost digit of the FREQUEN CY MHz thuumbwheels is changed in order through all possible setting VCO should smoothly anOd continuously increase in negative voltage as VCO increases 5 43 TM 11 6625 3016 14 START RECEIVER TROUBLESHOOT ING PRESET AN GRM 114 CONTROLS PER TABLES 5 5 AND 5 6 NAL SIGNAL GEN ERATOR AT 111 1 MHz 40 dBm 30 AM AT 1 KHz TO INPUT CON NECTOR MEASURE SIGNAL A1A13J1 1 WITH OSCILLO SCOPE 250 KHz 0 5 TO 1 5V P P YE 5 44 CHECK DEVIA TION KHz WATTS METER REFER TO FIG URE 5 10 MEASURE SIGNAL AT A1A20 J6 WITH SA 120 MHz 38 dBm TO 45 dBm METER REFER TO FIGURE 5 7 CHECK OSCIL LOSCOPE RE FER TO FIGURE 55 MEASURE SIGNAL AT A1A19 J1 WITH SA 250 kHz IF MONITOR AUDIO IS BAD SET PWR OFE BATT SWITCH TO F REPLACE A1A13 250 kHz MONI TOR AUDIO ckt BD Figure 5 5 Receiver troubleshooting sheet 1 of 14 A1A24A2 120 MHz RECEIVER IS BAD SET PWR QFF BATT SWITCH TO REPLACE A1A24A2 120 MHz RECE
307. rd 10 to Mother Board 12 figure 5 46 Install Circuit Board retainer 8 to frame support member 129 5 46 Attach two 1 4 Phillips screws and two lockwashers which secure Regula tor and Power Supply Circuit Board retainer 8 to frame support member 129 figure 5 46 install Static Discharge Protector 35 to Mother Board 12 5 46 Install tagged coax cables to Static Discharge Protector 35 figure 5 46 Attach two 1 4 Phillips screws and two lockwashers to underside of Mother Board 12 which secure Static Discharge Protector 35 to Mother Board figure 5 46 Install mounting bracket 34 to Mother Board 12 5 46 Install 1200 MHz Amplifier 36 to Mother Board 12 5 46 Attach four Phillips screws and four lockwashers to underside of Mother Board 12 which secure 1200 MHz Amplifier 36 to Mother Bead Sol der wire to feed through capacitor on assembly figure 5 46 Attach RF cables to 1200 MHz Am plifier 36 figure 5 46 Solder wire to 1080 MHz Multiplier Amplifier 33 feed through capacitor figure 5 46 Install 1080 MHz Multiplier Ampl 33 to mounting bracket 34 figure 5 46 Attach one 1 8 Phillips screw and one 5 32 Phillips screw and one lock 90 31 32 33 34 35 36 37 washer which secure 1080 MHz Multi plifier Amplifier 33 to mounting bracket 34 5 46 Attach tag
308. rome 2072100 ERES 1 u 1 890 56502 CTO FIRST MIXER RELAY WO kHz TO t GHe 20 dBm 6503 TO LIGHT 6850 80 ASSY 2 700 2372 400 ul i A TORT el LEVEL AMP ASSY 7005 2372 400 Figure 6 42 High level amplifier A1A28 schematic diagram 6 107 6 108 blank NOTES 1 LAST REF NO USED APAIAICAS A2AIAIQU 20 PIE 4261 RIG Ft SPI 24 Swe 2 REF DES NOT USED APAIABRB 3 ALL RESISTORS ARE 1 4 W 10 UNLESS OTHERWISE NOTED 4 ALL RESISTANGE IS EXPRESSED IN OHMS UNLESS OTHERWISE NOTED 5 ALL CAPACITANCE 16 EXPRESSED IN PIOOF ARAOS UNLESS OTHERWISE NOTED 6 AZATAZJ2 18 INSULATED FROM THE FRONT PANEL 7 DEFINITION OF SPECIAL PURPOSE SYMBOL FLOATING GROUND FLOATING GROUND WILL BE ELECTRICALLY ISOLATED FROM FM AM 1006 GROUND REF FM AM 1000S GROUND a gt ABALAZPS PANEL A2J4 PA 15 SINGLE PIN CONTACT Ets FRONT PANEL SINGLE SET OF CONTACTS PART OF MULTIPLE CONTACT CONNECTOR REFERENSE BD 17D0 2380 200 BD ASSY 7010 8380 300 FRONT PANEL ASSY 7005 2380 4 109 COMPOSITE 7003 2380 000 9 ALL LF383 S HAVE THE FOLLOWING CONNECTIONS THAT ARE NOY SHOWN 8 V 2 48 CONNECTED TC 41 1 4v 4 3
309. secure INT MOD controls to Front Panel 44 figure 5 47 Remove INT MOD controls from Front Panel Remove hex nut and lockwasher which secure SCOPE IN jack 107 to Front Panel 44 figure 5 47 Remove SCOPE N jack 107 from Front Panel Use an Allen wrench to loosen socket head screws in 1 5 5 15 KHz control knob 122 figure 5 47 96 97 98 99 loo 101 102 103 104 105 106 107 108 109 110 111 TM 11 6625 3016 14 Remove knob from control shaft Tag and unsolder wires from 1 5 5 15 KHz control at rear of Front Panel 44 figure 5 47 Remove hex nut 112 and flat washer which secure switch to Front Panel 44 fgure 5 47 Remove 1 5 5 15 KHz control and lockwasher from Front Panel 44 fgure 5 47 Tag and unsolder wires from 10 MHz CAL control 126 figure 5 47 Unscrew control from mounting block at rear of Front Panel 44 5 47 Pull off green lamp cover 146 from left hand Phase Lock lamp on Front Panel 44 figure 5 46 Use a piece of tape to remove lamp from lamp socket Tag and unsolder wires from lamp Socket at rear of Front Panel 44 figure 5 46 Remove lamp socket from rear of Front Panel 44 figure 5 46 Pull off green lamp cover 147 from right hand Phase Lock lamp on Front Panel 44 figure 5 46 Use a piece of tape to remove lamp from lamp socket Tag and unsolder wires from la
310. shed 90 BNC connector then attach antenna 90 connector assembly to ANT INPUT Connector If an external antenna attached to an unterminated coax cable is used remove any possible static charge buildup before connecting coax to ANT INPUT connector 2 6 Power Requirements The AN GRM 114 can be powered from its internal battery pack or from ac or dc power sources For ac operation all units are normally factory wired to accept external power sources which are generally available at the installation site TM 11 6625 3016 14 NOTE Before making any ac power con nections check the AN GRM 114 power rating against the power source rating to insure that they are compatible If they are not refer to for power supply modifications Power rating for the AN GRM 114 can be found on the Model Serial No nameplate which is located on the bottom side of the unit or in table 1 1 An adhesive CAUTION sticker is on all units and power cables wired for operation at 230 V ac No sticker is on units wired for operation at 110 V ac The AN GRM 114 is designed to operate continuously with inputs of 20 W or less into the TRANS RCVR connector Should the input power to the AN GRM 114 exceed 20 W use the 10 dB 150 W power attenuator supplied with the AN GRM 114 Use of the 10 dB 150 W attenuator will reduce the in coming power by a factor of 10 If the 10dB 150 W attenuator is not available the following chart m
311. st gt 0 Test ORSELMA Form 6031 1 Jul 764 0 GROUP SECTION II MATTER DE ALLOCATION CHART TEST SET RADIO AN GRM 114 NUMBER 2101103 01012 01013 01614 0101401 01015 01016 01017 0101701 010179101 0101702 2101703 010170301 0101704 0101705 010170501 2 3 COMPONENT ASSEMBLY MAINTENANCE FUNCTION C8 ASSY NO 3 DUAL GENERATOR A1412A3 Test 7010 2375 200 Repair PCB ASSY 250 KHZ MONITOR AUDIO A1A13 Inspect P N 7010 2357 300 Test Test Replace ASSY REGULATOR AND POWER SUPPLY 1 14 Inspect P N 7010 2367 201 Test Test Replace MECH ASSY 1080 MHZ MULTIPLIER AMPLIFIER 1 15 Inspect P N 7048 2351 600 Test Test Replace ASSY 1080 MHZ MULTIPLIER AMPLIFIER 15 1 Test P N 7010 2351 300 Repair MECH ASSY 1200 MHZ DIGDE SWITCH 16 Inspect P N 7013 2329 700 Test Test Replace i MECH ASSY POWER MONITOR 17 Inspect i P N 7005 2373 700 Test i Test T Replace MECH ASSY SPECTRUM ANALYZER Aj418 Inspect P N 7029 2362 600 Test Test Repair MECH ASSY SPECTRUM ANALYZER MODULE 1 Test P N 7030 2363 200 Replace PCB ASSY NO 1 SPECTRUM ANALYZER AlA18A1A1 Test 7010 2359 3095 Repair PCB ASSY SCOPE INVERTER 1 1 2 Test P N 7010 2362 400 Replace MECH ASSY SPECTRU
312. ted signal level oper ates the AGC and squelch systems The AGC Sys tem controls the gain from the 120 MHz Receiver to the 250 kHz Monitor Audio Circuit Board The SQUELCH adjustment controls the squelch threshold which is the signal level required at the ANT INPUT connector for audio output to be enabled and the detected signal level is applied to the DEVIATION KHz WATTS meter to display the signal strength A 250 kHz Interme diate Frequency 1 F is applied to the oscillo scope for display of the AM envelope The 250 kHz I F is rectified to a dc level through a dis criminator and audio filter The dc level is the reference for the FREQ ERROR KHz meter If the I F signal increases the dc level increases moving the FREQ ERROR KHz Meter in the positive direction If the signal decreases the dc level decreases moving the FREQ ER ROR KHz watts meter in the negative direc tion The amount of change in the Intermediate Frequency as it increases or decreases due to modulation is the FM deviation The rate of change as the Intermediate Frequency increases or de creases is the FM audio signal This signal is sent 3 4 to the oscilloscope for monitoring FM deviation and frequency This signal is also applied to a peak detector to operate the DEVIATION kHz WATTS meter A separate FM audio output goes to the FM contact of the AM FM switch The AM audio output goes to the AM position of the AM FM switch T
313. tep Procedure 5 Set MODULATION FREQUENCY Hz thumbwheels to the desired audio frequency MODULATION FREO Hz 6 Apply power to AN GRM 114 as instructed in paragraph 4 3 and also apply power to UUT While observing the MM 100 meter adjust INT MOD OFF control to the desired signal level ac volts rms TM 11 6625 3016 14 Table 4 15 Audio Generation with MM 100 Operating Instructions Continued Step Procedure Illustration 7 Disconnect the end of the cable from the INPUT jack of the MM 100 and connect the cable to the input of the UUT UUT INJECTION POINT INT MOD OUT CONNECTOR AN GRM 114 COAX CABLE CABLE W BNC AND UUT CONNECTORS Table 4 16 Audio Generation with Oscilloscope Operating Instructions Procedure Illustration Do not exceed 200 V peak to peak to SCOPE IN connector Connect BNC tee connector to SCOPE IN connector 4 53 TM 11 6625 3016 14 Table 4 16 Audio Generation with Oscilloscope Operating Instructions Continued Step Procedure Illustration 2 Connect one end of short coax cable to INT MOD OUT connector and opposite end to BNC tee connector previously attached to SCOPE IN connector INT MOD OUT UUT INJECTION POINT INT MOR OUT CONNECTOR SCOPE IN CONNECTOR AN GRM 114 3 Apply power to UUT 4 Apply power to AN GRM 114 as instruct ed in SHORT COAX BNC AND CABLE CAUTION
314. terial b Jammed signals It is likely that under real or simulated tactical condi tions the receiver will be jammed by the enemy Enemy jamming is done by transmitting a strong signal on the same frequency as that used for com munication making it difficult or im possible to receive the desired signal Unusual noise or signal strength indica tions without messages may be caused by enemy jamming signals from a friendly station or noise from a local Source or the receiver may be defec tive To determine whether or not the interference is originating in the 4 34 TM11 6625 5010 14 Table 4 10 Receiver Operating Instraetions Conti vaed M ue Step lllustration 9 AN GVEN 114 disconnect and remove Cont antenna the interference cen tinues the AN GRM Id is defective Enemy jamming signats may be typed as continuous wave or modulat ed jamming signal may be intend ed to block a single frequency This is called spot jamining The enemy may Use one or several transmitter jain or band of drequen cies This method is called barrage jamming Following are sev ral ty pes of jamming signals 1 CW continuous wave jamming CW jamming is transmitted as st adv carrier This signal beais willa another Sivaal and prodi es a steady ione or in some cases quieting effect CW jamming signais may also be keyed by using a rand
315. the National NATO stock number or the specific tool or test equipment e Tool Number This column lists the manufacturers part number of the tool followed by the Federal Support Code for Manufacturers 5 digit in parentheses TM 11 6625 3016 14 SECTION MAINTENANCE ALLOCATION CHART TEST RADIO ANGRM 114 4 4 2 3 MAINTENANCE CATEGORY GROUP COMPONENT ASSEMBL Y MAINTENANCE NUMBER FUNCTION 00 TEST SET RADIO AN GRM 114 Inspect P N 7002 2364 302 Install Replace Test Test Adjust Adjust 4 Repair 5 thru L 01 MECH ASSY COMPOSITE Al Test P N 7003 2364 101 Repair 0101 MECH ASSY FRONT PANEL 1 Inspect A Visual P N 7005 2377 700 Replace 3 24 010101 WIRE HARNESS ASSY FRONT PANEL 1 1 1 Inspect Visual P N 7007 2377 800 Replace 5 24 0102 MECH ASSY UPPER FLOOR A143 Inspect 0 Visual P N 7006 2364 400 Replace 24 010201 MECH ASSY TCXO OSCILLATOR Inspect 5 Visual P N 5850 000 010 Test 2 4 Replace 3 24 010202 MECH ASSY AMP 2 PRESCALER A1A3A1 Inspect 5 Visual P N 7024 2322 500 Test 5 3 4 14 24 Test 1 3 4 8 24 32 Replace 24 01020201 PCB ASSY HET AMP 2 PRESCALER 1 1 1 Test 5 1 3 4 8 24 P N 7010 2368 400 2 010203 MECH ASSY 1200 2200 MHZ OSCILLATOR 1 2 Inspect P N 7025 2356 000 Test Test Replace 01020301 ASSY 1200 2200 MHZ OSCILLATOR 1 2 1 Test P N 7010 2355 900 Repair 010204 PCB ASSY AGC SYSTEM 1 Ins
316. through PWR OFF BATT switch or AC DC OFF Switch make sure INTENSITY control is at moderate left position Adjust INTENSITY control cw and FOCUS control appropriately to obtain a sharp visible trace display Illustration INTENSITY FOCUS PX CHT DISPLAY D 3 gt A In ST ag TM 11 6625 3016 14 Table 4 8 Oscilloscope Operating Procedures Continued Step Procedure Illustration 2 Adjust VERT control and HORIZ control to center scope trace over major horizon tal axis of crt CRT DISPLAY 3 Connect signal stimuli to SCOPE IN connector TM 11 6625 3016 14 Table 4 8 Oscilloscope Operating Procedures Continued Step Procedure Illustration 4 Adjust SWEEP control EXT V DIV con trol and SWEEP vernier control to ob tain a stable waveform NOTE CRT DISPLAY EXT vernier control E must remain in CAL position EXT V A fully cw detent id 5 5 SWEEP VERNIER QT 5 Disconnect the signal stimuli from the SCOPE IN connector 4 27 TM 11 6625 3016 14 Table 4 8 Oscilloscope Operating Procedures Continued Step Procedure Illustration 6 Emergency operating procedures Refer to the emergency operating procedures battery weakening in table 4 2 7 Stopping procedures a Set AC DC OFF switch to OFF position b For further stopping procedures refer toltable 4 2 4 6 Receiver Operating Instructions N
317. time figure represents the average time required to re store an item assembly subassembly component module end item or system to a serviceable con dition under typical field operating conditions This time includes preparation time troubleshoot ing time and quality assurance quality control time in addition to the time required to perform the specific tasks identified for the maintenance func tions authorized in the maintenance allocation chart Subcolumns of column 4 are as follows C Operator crew F Direct Support D Depot O Organizational H General Support Maintenance D 2 e Column 5 Tools and Equipment Col umn 5 specifies by code those tool sets and test equipment required to perform the designated function The numbers appearing in this column refer to specific tools and test equipment which are identified in Section 4 Explanation of Format of Section Ill Tool and Test Equipment Requirements The columns in Section are as follows Tools or Test Equipment Reference Code The numbers in this column coincide with the numbers used in the Tools and Equipment col umn of the applicable tool or test equipment for the maintenance functions b Maintenance Category The codes in this column indicate the maintenance category normally allocated the tool or test equipment C Nomenclature This column lists tools test and maintenance functions d National NATO Stock Number This column lists
318. tion diagram Figure 5 23 High frequency phase lock loop A1A9 component location diagram 5 132 TM 11 6625 3016 14 JI 2 Figure 5 24 79 80 MHz loop A1A10 component location diagram 5 133 TM 11 6625 3016 14 COMPONENT SIDE 2345 6 7 8 9 10 I I2 13 15 REVERSE SIDE B FH J NP RS Figure 5 25 VCO turner A1A11 component location diagram 5 134 TM 11 6625 3016 14 COMPONENT SIDE PIN IO REF PI CABLE DRESS Figure 5 26 Dual tone generator A1A12 component location diagram 5 135 per Iur EL queden Qu Tess Eu ipee enn eee ek c me cQ 927 i Li 24 Pr el 5 potu y 4 kdo 2 JA 5 t6 qur vr eae Te ome s 1 Les 1 C25 lt R6 4 4 23 MM rire S 27 825 2 30 BGS SAREE 4825 x7 57 7 g RO R76 RBH 104 i _ Z 8 Rios 50 e J 049 4 F 4 7 7 CRI3 NUS i rad x3 ECS E i a ane CRI9 5i 4 9 T DIO mi SAUVE v us TE Ne RB 7 RS R38 ARAU 75 zm 812 Cf P ca qp E r a ARI 5 RIG 9 2 A a im Q
319. tion of 1 kHz at 3096 38 39 TM 11 6625 3016 14 Verify that the digital multimeter indicates 50 millivolts If the digital multimeter indication is not correct adjust A1A13R115 for a multimeter indication of 50 millivolts Remove all cables and test equipment turn off power remove Power Cord from Power Source and reassemble the AN GRM 114 f FM AM Generator A1A24A3 FM AM Generator A1A24A3 is aligned using the follow ing procedur 1 e Remove all power from the AN GRM 114 and disassemble the unit to gain access to the FM AM Generator A1A24A3 module Remove the metal shield from the FM AM Generator mechanical assem bly A1A24A3 then connect the digi tal voltmeter between the tie point of R24 and R25 on circuit A1A24A3A1 Connect the AN GRM 114 Power cord to power source and set the front panel controls as listed Control Setting GEN RCVR GEN RCVR WIDE MID NARROW NARROW AC DC DC AM FM AM SWEEP 10uS INT MOD OFF 1 KHz INT MOD OFF EXT V DIV 15 KHz DEV PWR SIG BFO OFF BFO 1 5 5 15 KHz 5 KHz 4 Adjust A1A24A3L2 through its entire range cw and then fully ccw and check that the digital voltmeter indi cates 1 to 10 volts dc b Adjust A1A24A3L2 for indica tion of 5 0 5 volts dc on the digital voltmeter and check that the 250 kHz signal displayed on the oscillo Scope is stable 5 119 TM 11 6625 3016 14 5 120 NOTE If the indications measured in steps 4 and 5 are
320. to any instrument that has been subject to negligence accident shipping damage misuse or improper installation or operation or that in any way has been tampered with altered or repaired by any person other than an authoriz ed IFR service organization or any employee thereof or to any instrument whose serial number has been altered defaced or removed or to any instrument purchased within and thereafter re moved beyond the continental limits of the Quantity United States Annual recalibration is not in eluded in warranty 2 All sales are FOB IFR Factory Wichita IFR will assume responsibility for freight charges on all legitimate warranty claims within thirty 30 days from the original shipping date All legitimate warranty claims within thirty 30 to ninety 90 days should be shipped to IFR freight collect and will be returned freight col lect All freight on warranty claims after ninety 90 days will be paid by the customer 3 This warranty shall at IFR s option become void if the equipment ownership is chang ed unless the prior owner or the proposed owner obtains approval of continuation of the warranty prior to the change of ownership 4 This warranty is in lieu of all other warranties expressed or implied and no one is au thorized to assume any liability on behalf of IFR or impose any obligation upon it in connection with the sale of any instrument other than as stated above 5 The right
321. trol Controls of AM modulation or FM peak devia tion for an approximate 1 kHz tone Modula tion control is OFF in full ccw detent position when out of detent rotate control cw to in crease modulation level MODULATION FREQ Hz Select internal modulation frequency produced thumbwheels by dual tone generator 10 0 Hz through 9999 9 HZ SCOPE IN connector Vertical deflection input for oscilloscope SWEEP gontrol Controls horizontal sweep speed of oscilloscope in indicated increments per graticule division SWEEP vernier control Permits continuous variation of sweep speed within any of the ranges provided by SWEEP control In CAL position fully cw detent oscilloscope horizontal graticule divisions are equal to setting of SWEEP control NOTE Do not make time measurements with SWEEP vernier control out of CAL position 4 7 TM 11 6625 3016 14 Table 4 1 AN GRM 114 Controls Indicators and Connector Continued Control indicator or conntector Function AC DC OFF switch 3 position switch which ac couples scope inputs when in AC position dc couples scope inputs when in DC position and disconnects power from oscilloscope spectrum analyzer in OFF position NOTE When switching from one coupling mode to another pause briefly in OFF position this ensures that scope power supply inverter will start To conserve power during battery operation place coupling switch to OFF when oscilloscope or spec trum
322. tructions Step Procedure Illustration When applying power to the oscilloscope or spectrum analy zer from the PWR OFF BATT Switch or from the AC DC OFF Switch make sure INTENSITY control is in moderate left position 1 Center the oscilloscope trace using the HORIZ and VERT controls PWR OFF BATT 4 68 Step 2 3 TM 11 6625 3016 14 Table 4 21 Frequency Error Measurement Operating Instructions Continued Procedure Set the 1 5 5 15 KHz control to the 15 KHz Set FREQUENCY MHz thumbwheel switches to 0000100 Illustration 3 P E cn il d 1 5 5 15 KHz 5 CRT DISPLAY FREQUENCY MHz 4 69 TM 11 6635 3016 14 Step Table 4 21 Frequency Error Measurement Operating Instructions Continued Procedure Verify that both the oscilloscope and the FREQ ERROR KHz meter read 10 KHz Other oscilloscope and FREQ ERROR KHz meter ranges may be checked in the same manner Emergency operating procedures For emergency operating procedures battery weakening refer to table 4 2 Stopping procedures Refer to the stopping procedures in table 4 2 4 13 Audio Frequency Monitor Function For a demonstration of the audio frequency monitor function refer to the audio generator operating instructions in paragraph 4 8 4 70 Illustration Ra 7 ERROR 4 14 Multimeter Operating Instructions 4 22 lists operating instructio
323. ual Tone Generator switch assembly 74 to Front Panel 44 Install connector to bottom rear of PCB 109 figure 5 47 Attach four hex nuts 72 and four lockwashers 73 which hold switch mechanical assembly 74 to Front Panel 44 figure 5 47 Secure left hand phase lock lamp socket 146 to rear of Front Panel 44 figure 5 46 Solder tagged wires to lamp socket loo 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 TM 11 6625 3016 14 Secure lamp cover to Front Panel 44 figure 5 46 Secure right h and phase lock lamp Socket 147 to rear of Front Panel 44 figure 5 46 Solder tagged wires to lamp socket Secure lamp cover to Front Panel 44 figure 5 46 Secure INPUT LEVEL lamp socket 148 to rear of Front Panel 44 figure 5 46 Solder tagged wires to lamp socket Secure lamp cover to Front Panel 44 figure 5 46 Secure Power ON lamp socket 149 to rear of Front Panel 44 5 46 Solder tagged wires to lamp socket Secure lamp cover to Front Panel 44 figure 5 46 Secure 0 dBm lamp socket 150 to rear of Front Panel 44 5 46 Solder tagged wires to lamp socket Secure lamp cover to Front Panel 44 figure 5 46 Attach coax cables to TRANS RCVR connector 92 10 MHz REF OUT connector 96 ANT INPUT connector 82 and SCOPE IN nector 107 figure
324. ugh 28 until no adjustments are required Disconnect and remove the external oscilloscope coaxial cables and the BNC tee adapter Set the ANALY DISP control cw just out of detent and the FREQUENCY MHz thumbwheels to 125 500 0 On the Dual Tone Generator A1A12 module disconnect A1A12J1 from A1A12P1 Remove all power from the AN GRM 114 then remove the Spectrum Analyzer Assembly A1A18 from the Front Panel to gain access to Spec trum Analyzer Module No 2 A1A18 A3 Then reapply power to the AN GRM 114 Obtain an rf signal generator anti set for a frequency of 125 500 with an rf output level of 90 dBm and con nect a coaxial cable from the ANT IN PUT connector to the signal generator output Verify that the baseline on the CRT display 15 109 dBm 1 dB the baseline is not correct adjust A1A1 A3R30 for the correct baseline dis play 5 123 TM 11 6625 3016 14 5 124 86 Verify that the signal displayed on the CRT is 90 dBm 1 dB If the signal displayed is not correct adjust 1 A18A3R4 for the correct signal display 37 Set the signal generator for an rf out put of 60 dBm 38 Check that the signal displayed on the CRT is 60 dBm 1 dB If the signal displayed is not correct adjust A1 A18A3R29 for the correct signal display 39 Repeat steps 34 through 38 until no adjustments are required 40 Set the signal generator for an rf out put of 30 dBm 41 Verify
325. ures please let us know Mail your letter DA Form 2028 Recommended Changes to Publications and Blank Forms or DA 2028 2 located in back of this manual direct to Commander US Army Communications Electr onics Command ATTN DRSEL ME MQ Fort Monmouth New Jersey 07703 In either case a reply will be furnished direct 10 you TABLE OF CONTENTS Paragraph Page INTRODUCTION Section L General Scope Maintenance forms records and reports Reporting equipment improvement recommendations Administrative storage Destruction of Army electronics materiel II Description and data Purpose use Description and capabilities Equipment characteristics Items supplied Items required but not supplied Warranty information Safety precautions _ RE NO CO ER Em Bm Lm mn ds ddp ul ol lel TI 1 TM 11 6625 3016 14 LI AD CHAPTER 3 4 5 PREPARATION FOR USE AND INSTALLATION Unpacking Assembly Checking unpacked equipment Siting Installation instructions Power requirements Initial checks and alignment THEORY OF OPERATION General theory Receive theory Generate theory Frequency error theory 151 local oscillator theory 2nd local oscillator theory Dual tone generator theory Oscilloscope theory Spectrum analyzer theory MM 100 Multimeter theory Power supply theory OPERATING INST
326. using the following procedures 1 Remove all power from the AN GRM 114 and disassemble the AN GRM 114 to gain access to the Regulator and Power Supply A1A14 module Connect the AN GRM 114 power cord to power source Set the PWR OFF BATT switch to PWR and connect the digital volt meter between pin 5 of 14 1 and ground Verify that the digital voltmeter indi cates 10 95 to 11 05 volts dc If the digital voltmeter indication is not correct adjust A1A14R24 for a read ing 11 00 volts dc Connect the digital voltmeter be tween pin 9 of A1A14P1 and ground and check for an indication of 34 5 to 35 4 volts dc If the digital volt meter indication is not correct re place Regulator and Power Supply A1A14 Connect the digital voltmeter be tween pin 15 of 14 1 and ground and check for an indication of 10 5 to 13 5 volts dc If the digital volt meter indication is not correct re place Regulator and Power Supply A1A14 Set the PWR OFF BATT switch to OFF remove the AN GRM 114 pow er cord from power source and dis connect the internal battery Observe the polarity and connect the dc power supply to the AN GRM 114 battery leads Connect the digital voltmeter to the dc power supply output and adjust the dc power supply for a 14 volt dc TM 11 6625 3016 14 3 Set the AN GRM 114 controls as output as indicated on the digital listed voltmeter Control Setting 10 Set the PWR OF
327. ust be observed 100 W 10 sec on 60 sec off 15 duty cycle 50 W 20 sec on 45 sec off 30 duty cycle 30W 2 min on 2 min off 50 duty cycle If the AN GRM 114 is being power ed by a vehicular dc supply unplug the AN GRM 114 before starting the engine 2 7 Initial Checks and Alignment If an external power source is used either ac or dc using the cigarette lighter adapter ensure that the power cable is securely mated to the ac plug on the out side of the AN GRM 114 rear panel 2 3 2 4 blank TM 11 6625 3016 14 CHAPTER 3 THEORY OF OPERATION NOTE The schematics referenced in this chapter are located in Chapter 6 3 1 General Theory Refer to Figure 3 1 for a block diagram The AN GRM 114 Communications Service Moni tor is a highly accurate versatile portable unit which may be used to monitor align and trouble shoot CW AM FM and SSB Communications equipment The unit features a quadruple conver sion digitally synthesized superheterodyne receiver and a dual conversion digitally synthesized low power rf signal generator The unit also contains a variable frequency tone generator and a fixed frequency tone generator refer to paragraph 3 7 spectrum analyzer multimeter refer to paragraph an oscilloscope refer to paragraph 3 8 an rf wattmeter The AN GRM 114 may be power ed refer to paragraph 3 11 by an external source of 115 or 230 V ac 11 to 28 V dc or by the in ternal 12 v
328. visions If the signal displayed is not correct adjust A1A18A1R39 for the correct signal display 50 Set the FREQUENCY MHz thumb wheels to 120 500 0 and verify that the signal displayed on the CRT is at the fifth major division left of the center graticule 2 minor divisions the signal displayed is not correct adjust A1A18A1R39 for the correct signal display 51 Repeat steps 46 through 48 until the adjustments to A1A18A1R39 are balanced 52 Set the FREQUENCY MHz thumb wheels in 1 MHz steps from 1205000 to 130 500 0 and verify that the sig nal displayed on the CRT moves one major division 2 minor divisions for each 1 MHz step 53 On the Dual Tone Generator A1A12 reconnect A1A12J1 to A1A12P1 54 Remove all cables and test equipment turn off power remove power cord from power source and reassemble the AN GRM 114 5 8 Component Location Diagrams Figures 5 14 through 5 45 contain the component location dia grams referred to within the troubleshooting and alignment procedures of paragraphs 5 6 and 5 7 5 9 Inspection This paragraph provides a check list useful in determining the physical condition of the AN GRM 114 through visual inspection Defects resulting from wear physical damage or deterioration can be detected using this checklist Power to the AN GRM 114 must be disconnected while completing entire checklist a Inspect AN GRM 114 exterior for visible damage repair or replace damag
329. z control Selects full scale sensitivity of FREQ ERROR KHz meter Cathode ray tube crt display Display screen for AN GRM 114 oscilloscope or spectrum analyzer INTENSITY control Controls brightness of crt trace Rotate control ccw to decrease brightness cw to increase brightness NOTE Warmup time of crt is approxima tely 30 seconds from a cold start up trace display will not become visible until crt achieves warmup HORIZ control Controls horizontal position of oscilloscope trace Rotate control cw to move trace to right ccw to move trace to left FOCUS control Controls sharpness of oscilloscope trace VERT control Controls vertical position of oscilloscope trace Rotate control cw to move trace up ccw to move trace down TM 11 6625 3016 14 Table 4 1 AN GRM 114 Controls Indicators and Connectors Continued Control indicator or connector Function ANALY DISP OFF control Continuously varies spectrum analyzer dispersion within a span of 1 to 10 MHz Full cw rotation of control provides a dispersion of 1 MHz per major graticule division full ccw rotation short of detent position provides a dispersion of 500 kHz per major graticule division In full ccw detent position spectrum analyzer is off and oscilloscope is on NOTE During spectrum analyzer operation all oscilloscope controls except IN TENSITY control FOCUS control and AC OFF DC switch are disabled Spectrum analyzer can be turned off using

Download Pdf Manuals

Related Search

Related Contents

Notice - Castorama  Valueline VLMB34010U20  8541880 Manual.indd  EA538AS－2 （圧着ペンチ） 裸端子用 スチール製（メッキ加工） 適合  Cilindros de rescate  LETTRE D`INFORMATION JANVIER 2014  Manuale Utente Rev. 8  取扱説明書 [詳細版]  EX-92633 Box PC User Manual  Nexgrill 720-0439 User's Manual  

Copyright © All rights reserved. Failed to retrieve file