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TEKTRONIX

1. L4 8 wr jJ Il Dl RL T ee es ee euin ui eaU euin GLAZ L 61 Sui IWAYALNI LAdNI L s 001 s OL sm Hie will TS T p s 1 0 LX SH3AV JII j J 4 1 ea uu P su 001 su OL MTT TTT 11 ee SSES LLLI ITEM I ILL PT HHI Pi HII J f p LX DH3AV TL 9 3 s 10019 ER aH EE an Q M su zur 1 eee SU OL su 001 57 Sri 01 st 001 HOHHH LNAWSAYNSVIAW 3SVO LSHOM 1432 7 1 13 OPERATING INSTRUCTIONS GENERAL The 7D15 Universal Counter Timer plug in unit operates with the readout system of Tektronix 7000 series Oscilloscopes to measure frequency or frequency ratio and to totalize count number of events To effectively use the 7D15 the operation and capabilities of the instrument must be known This section describes front pane contro functions and general information on signal input connections Installation The 7D15 is calibrated and ready for use as received It can be installed in any com partment of Tektroni
2. LI LLL VE 100111 w in LIN N MNI N No N MIL PTT HIN b A I 1 ACHEN UN 7 titi IN MR Nu U ets ee sma N N NU LOW LM N LIN EXCEED EFFECTIVE COUNTER HYSTERESIS COUNTERED IN TYPICAL TTL 0 C TO 50 C RANGE ENVIRONMENT INSTRUMENT CALIBRATED WITHIN SIX MONTHS USING INTERNAL OSCILLATOR INSTRUMENT OPERATING WITHIN PEAK NOISE LEVEL DOES NOT SIGNAL RISETIMES ARE AS EN CONDITIONS 001 000196 HOHH3 LNANSYNSVAW 3SVO LSHOM pa m m md 100 ns 1us 10 us 100 us 1 ms 10 ms 100 ms 1s 10s 10 ns INPUT PERIOD Fig 1 4 7D15 Period mode accuracy stated in percent 1432 4 AVERG CLOCK 1 ms o C TO 50 C RANGE W HH WIEN M Dr iam ii X EXCEED EFFECTIVE COUNTER HYSTERESIS INSTRUMENT OPERATING WITHIN 0 PEAK NOISE LEVEL DOES NOT COUNTERED IN TYPICAL TTL SIGNAL RISETIMES ARE AS EN ENVIRONMENT SIX MONTHS HH n SEEN IEEE TUE mitt TE UE DUX Is HI Wh NIE cee steno HEH AN E NL X10 AVERG EET TIN pud Lll
3. a rt a asses E SQ uu owe ME 7D15 diagrams MEASUREMENT INTERVAL TRIGGER A and B P P SENS on diagrams clips etc VOLTAGE AND WAVEFORM TEST CONDITIONS Typical voltage measurements were obtained under the following conditions unless noted otherwise on the individual Non loading digital multimeter Voltmeter Type Input Impedance 10 on all ranges Range 0 to 1000 volts Recommended type as used for voltages on diagrams See Waveform SOURCE INPUT B note on each COUPLING AC diagram DISPLAY TIME 0 15 PRESET SLOPE tV 7B53A A horizontal compartment Tektronix 7D13 Digital Multimeter STORAGE ON TRUE GATE TRUE GATE GATE NORM MODE FREQ B TIME 100 ms CLOCK 1 ms No signal input for voltage measurements 4 V 1 kHz square wave from oscilloscope Calibrator applied to CH A INPUT connector for waveforms A 7A13 Amplifier right vertical compartment using a 10X probe with readout coding ring P6053 probe used for waveforms Level Slope Centered on positive slope Triggering Mode Norm Coupling AC Source INT Magnifier X1 Variable Cal In TIME DIV gt 1 ms 7704 Vertical Mode Right Horizontal Mode A A Intensity Optimum B Intensity Counterclockwise
4. ts y chan f Adjust R31 for the best front corner G Do Remove 1OX PROBE Q FoR STEP H v4 ATTENUATOR ACCURACY CHECK a Set Vertical Plug In sensitivity control to 5 mV b Inserttwo 10X attenuators between the output of the Square Wave Generator and the 7D15 input c With the Channel P P SENS control set to 1 V set the Square Wave Generator amplitude to obtain a five division display on Pointy Foe Cun TP FoR cH 6 d Remove one 10X attenuator and set the P P SENS control to 1 V e Check fora display of five divisions 0 25 division f Remove the 10X attenuator and set the P P SENS control to 10 V g Check for a display of five divisions 0 25 division h Move the 10X Probe to test point 141 Repeat steps b through g Using 2 P P Sens Cow vel i Disconnect Square Wave Generator leave 10X Probe connected for step 5 5 7 Calibration 7D15 TABLE 5 2 Channel B Compensation Set 7D15 Adjust Pulse Adjust for Long Term Ch B Generator Best Flat Rolloff and P P SENS Amplitude for Waveform Spiking aiw 0112 C113 C109 C110 0 32 div Remove one 10X attenuator Both 10X attenuators removed 5 INPUT COMPENSATION CHECK ADJUST a Connect the Square Wave Generator to the FREQB connector through two 10X attenuators and a Feed Through Terminatio
5. T 4 EI Am i r 7 3 Time 90949 77 _569 t ums Lx ae E P 1C Fh getty 1898 Fig CREED 8866 li en L Patt eil Q6680 1665 jel MI 8598 Lp t EEAS Sapu 7 FO8H D FZ9H cp tona s poo 2 1 l a t i 4 22198 3 a Y 918H2 zl 1 i 4 SIBHO S i cdd 62849 TE M ue 1 HERE M 45 63 47 aj 1 4 m A Sat amp Aug WU a s rak gt 1 3 t w J i E i 1 ri i 22947 _ i 1 j Emm nasa ey LP al 22 T 1 Tz BUM Su I EP i w Y f Joni 4 859 La 10815 w T Q857 r b 15 R804 U671 4 T Y Y 2 0853 Aa 9 1 1 gt X I 10655 x L 674 3 AQ z z f 8 zu p231 0823 8 P602 5 C651 O _ 0 Ex Tex wawa i Ac i n JSt GY 499H poe 1 oo umma
6. 35 1 1433 13 LINT lGk 5 EXT 00725 8247 E Yo22 iie XTAL sd CLOCK Jic u pring ts IOK Y ae Xov 2 DePL 2 Res C6374 Fe SG Tw 964 3k IK 48 A 9 up rond P gt i 5 Qu i 0628 44 Us 160151 C Di 7490 TRO 15121 Es s Red LU FS Robs e E aac 5 PARTIAL TIME BASE BOARD SEEC FoR DE ARE DECOUPLED h O_UYH 1 vD v SEE FOR DETAILS 7015 RESET FROM UZGA PIM io mS CLOCK ce TO L 1 EV ji 6443 7 4 L C644 490 erm PARTIAL 0 BOARD U654A 647A 740 7 1 7404 7 5 tol 8292 fi4 7 RS 47 BLO SEE PARTS LIST FOR SEMICONDUCTOR TYPES 41401 SEE PARTS LIST FOR EARLIER 281 Peo Q847 VALUES AND SERIAL NUMBER 55 Aor TET 5 o 2 ties OF PARTS MARKED v 9 WITH BLUE OUTLINE L 1 oe Ux Ties Biase 359 0100 0100 50mS 50mS 1433 14 4 gt VLIVA L HO i CRTAI RESET rag igen D
7. ee ig HH 12 A OO i lt wv tc O 4 2 e ma Ae gt Z 4 r d v a LZ 68 E D ue lt lt ll 1 cem sex eS oe s ania ciai D D C D CER OEE i T Z a 2 amp r E m C ot 7 lt lt I 2 e o pe ro c eo m lt 2 bj lt uz gt gt 2 m 2 Jw e 2 LU 209 22 6 5 co 2 oto 2 6 z 50 O pr oe Z 2 EF g9 go gt lt O m p 14 2 2 gt 17 2 2 bx bo 592 28 59 O Zw aut pur 5 10 1 1 01 001 000156 1432 6 dHOuua LNANSAYNSVAW ASVO LSHOM Fig 1 6 7D15 Time Interval mode accuracy stated in present Specifications 7D 15 5 01 Si 5 QOL sw DIET DUET IN3ANOHIAN3 TLL JVOIgAL NI 1 N3 SV 38V SAWILSSIY TVNDIS H 1920 LON 6300 NOIL VZINOHHONAS SISJH3JSAH H3 LN 1OO 3AIL23443 0339X3 LON 5306 13A31 3SION AV 3d 39NVH 2 04 012 0 NIHLIM ONILVH34O 1N3Wn HISNI 10 ONI LVH3dO LN3IWOHLISNI SHLNOW XIS NIHLIM GQG31V84911V9 YOLVYTTISSO ONISN SNOILIONOO
8. 551 RSTI GREE 820 FROM A25 Fe ja 3230 DINGAM ua al z x 7 R5BS 5583 82 0265 Q ia tt 4 meee 5 4 2 d R47 ead 510 parte EXT R587 AT RESET UAL au ESAR PE coal Lok R533 plea a od i M 820 2 2 gt U2660 04215 UA ATO amp 22 HOLD Az BUSY TPS Bo RESET edd 2646 T LOO Ec I Pi R535 fx PARTIAL SATE BOARD SEE E CRISS 35 gt NOTE SEE PARTS LISTS FOR SEMICONDUCTOR Ty PES ALL VOLTAGES amp RE DECOUPLED SEE DIAGRAM FOR DETAILS GATING CONTROL LOGIC T REC AVEF DR dAZ25 DISPLAY OUT SEE 8 AMA BII TRIGGER OUT SEE DIAG AM AE gt iG 9 BiG MARY DIAGRAM PARTIAL BASE RORRD mm amp 5B4 lx DISPLAY a TO DIAGRAM SEE DIAGRAM SEE PARTS LIST FOR EARLIER VALUES AND SERIAL NUMBER RANGES OF PARTS MARKED WITH BLUE OUTLINE IC TABLE 1433 17 271901 TOHINOO 9NIAV5 gt p224 MODE SWITCH BRB 5 SEE DIAGRAM cu lt lt PERIOD wipTHa F 5221 TIM MODE 4 lt jl AB 8v CLOSED WHE DISPLAY TIME IS
9. SEE DIAS lt MARA L 547 CH B INPUT FROM TITS DIAG 0 RER R286 5 370 Va 662 HORM FROM U268B 4 HERO GATE PERIOD NOR M de F 1 4 7 XT SET cael E RESET ec 2 7 cam 4 45 PER 5 kaag 03 A450 RAAE IK de d t CRABA U4Bc 2 4 7412 EERE 380 La TA aA D5 TOO OFF 1 4 8 2 2 REG LA4B9A RESET mE QE B PERIOD aL yeaa ore ej 08 ev 7 0490 6491 VRAS33 4 51 ERE gu PS 17 5300 PADO eK GATE i ER 8 9 6 TRUE l la i Ware A WOE CR372 TIM RATS U36860 S36 vel66 cy ON M U46638 uz645 6234 val si Ua 5A va 1 TT W536 101 529 u4338 1 51 vaio ISPLAYED 1390 WAVE FORM TT LION 6293 e662 EE 330 5V a n 55555 SET 1412 5 3 6 ET 2 f di 5 2 CRISS 27 EE Ek o V41O1O2 Ware CLOCK T EE FROM QB I ra uas DIAGRAM e 6727412 5556 TES e B B5 5y aaa ii USOA 2 KIESA J g D Usdb3A Val amp 61 1 8 5 5435 556 21005 L
10. V LVG 5 2 H2 4 eat WS w 1 N I 2 w n AID aT K i I Pe caer tyes WU We CLE eee FL F UP p i 4 a m F3 7 f O 4868 to ums EN gm AES f A St j t di LT 266 SL d d vr WM ED 5222 992 NA Ee UM 144 5 ee Fig 7 4 8 Power Supply circuit board 1433 25 ete S 0100 LELLLRILLILL GEL IL LL 20uS 0100 20 5 NEN 0100 20 5 KHZ 100mS 1433 15 SYOLJVANNOO 3IWV3dINI VIAN 5 H3MOd L A B COLUMN ROW Peel gt 38 _ v COLUMN ROW gt lt emex et 364 gt 36 aEADour 356 25 15V 3 34 284 30 33 TS 2 4 533 Drs 32 lt TS 4 PULSES SEE SEE gt 152 5 5 4 23 304 TS 57 4 5 30 OOH 29 IO T9553 4
11. ee a 2x71 TP d r A aaa rc 8 i ammi dn cum mc mh wq w s lai w JAMES aT I Wawa ET 1433 24 Om Y s RT50 U643 C644 Tertit cm os i 3 E 222 re T i Wg 4 ES EL Lak x5 5 EEG cascos E CUN B Ere af o 5 I CN ow e L 1 bPS H em ELAH a 2 g A k 15 Fat 7 z e ur uy EU be E x 8 o gt 65 8 3 167 EE sm 9 i r Thy J zs 4 Ww PEL ee HS Fi enr LO i eBoy Boc UL cea 5 2 180259 CHE ROTOS s d pe m oe m ete i 4849 V e 19 8 o iss 8 k 1 i ee ld RN i M RE 5 oli 96440 8 x 1 WE NE E E E jy VLLESM 7 S amp RMHO Ju B _ tr 777515 9618 E ew oe 51 9844 1 x6 f 3 1
12. 5 o 10530 8 eof 5 80 6 0499 FI i cag Le 2 R579 R407 1 416 C581 R406 9 Q217 419 R414 ioa R361 N e 0551 R554 C219 5 L203 9592 U413 U360 U536 e R410 R359 amp OL213 P y Ad 401 9213 x R386 R535 C490 R538 5 s T R207 U409 C939 g LR939 U386 R365 Ji BONS 2 ni R379 R547 LR931 S R396 R378 e e T395 R394 C208 Q393 R208 R393 R296 R348 U401 U295 R384 ex R349 5 82 as R344 ii R419 R387 es U390 R347 0339 5 T342 Q332 ex Q336 R339 R549 U371 C936 R338 5 R313 CASE R319 R397 0 O 0312 C313 C322 R340 CR322 A318 z R336 2 R392 06 ms fc R695 O 5 2 J323 R321 Q316 J696 2 C316 Q696 R323 C323 R696 TP589 1421 Q512 5 U519 Sane R511 ees R514 R499 9 0496 052 T R501 R464 R507 R49 ea U450 U463 vr e tr R358 R4 R452 j TP430 R436 R430 C428 049 U287 1432 Q369 R369 H R82 R288 0375 cR372 R286 R289 C284 042 e R176 U290 2 R284 or R483 R439 ms y Q303 C285 0285 5 2929 R283 T 5 U280 R183 R278 Toy co E R279 00 ER CR275 O27 R305 R274 Fig 7 2 Interface circuit boar R528 P599 n Q529 U519 Q459 E CR529 2 tc 0521 m R493 er om
13. 1432 18 Fig 2 11 Internal External clock switch 2 12 o TABLE 2 1 Frequency Ratio Decimal Point Chart TIME AVERG Switch Position 7D15 Correction Corrected Readout Factor Readout 0 0000 1 X10 000 00 1 X100 000 000 1 000 0000 1 TIM WIDTH and TIM WIDTH Averaging Measure ments 1 Set the 7D15 MODE switch to TIM WIDTH A and the AVERG switch to the desired number of measurements Operating Instructions 7D 15 to be averaged Set the GATE switch to NORM and the CLOCK switch to the desired resolution 2 Set the STORAGE switch to ON and the DISPLAY TIME control to the desired repetition rate NOTE The oscilloscope Calibrator may be used as the A and B Inputs to show operation i e connect a 1 kHz 0 4 V Calibrator signal to the A Input set the SOURCE switch to the outward position With the CLOCK set to 10 ns and the AVERG switch set to X10 the 7015 digital display will be 1000 000 us 10X calibrator accuracy 2 13 r Section 3 7D 15 CIRCUIT DESCRIPTION INTRODUCTION This section of the manual contains a description of the circuitry used in the 7D15 Universa Counter Timer plug in The circuitry starts with a block diagram discussion Following the block diagram discussion is a detailed discussion of the individua circuits A basic knowledge of discrete and digital electronics is needed for a thorough understanding of the instru
14. 2235 R243 315 0511 00 RES FXD COMP 510 OHM 5 0 25W 01121 5115 R245 315 0223 00 RES FXD COMP 22K OHM 5 0 25W 01121 2235 R247 315 0223 00 RES FXD COMP 22K OHM 5 0 25W 01121 2235 R250 315 0473 00 RES FXD COMP 47K OHM 5 0 25W 01121 4735 8251 315 0473 00 RES FXD COMP 47K OHM 5 0 25W 01121 4735 R254 315 0331 00 RES FXD COMP 330 OHM 5 0 25W 01121 3315 R255 315 0303 00 RES FXD COMP 30K OHM 5 0 25W 01121 3035 R256 311 1334 00 RES VAR NONWIR 2 5M OHM 20 1W 01121 11 443 R260 315 0101 00 RES FXD COMP 100 OHM 5 0 25W 01121 1015 R262 315 0201 00 RES FXD COMP 200 OHM 5 0 25W 01121 2015 R263 315 0203 00 RES FXD COMP 20K OHM 5 0 25W 01121 2035 R268 315 0511 00 RES FXD COMP 510 OHM 5 0 25W 01121 5115 R270 315 0101 00 RES FXD COMP 100 OHM 5 0 25W 01121 1015 R271 315 0123 00 RES FXD COMP 12K OHM 5 0 25W 01121 1235 R273 315 0102 00 RES FXD COMP 1K OHM 5 0 25W 01121 1025 R274 315 0473 00 RES FXD COMP 47K OHM 5 0 25W 01121 4735 R275 315 0911 00 RES FXD COMP 910 OHM 5 0 25W 01121 9115 R278 315 0511 00 RES FXD COMP 510 OHM 5 0 25W 01121 5115 R279 315 0751 00 RES FXD COMP 750 OHM 5 0 25W 01121 7515 R283 315 0101 00 RES FXD COMP 100 OHM 5 0 25W 01121 1015 R284 315 0510 00 RES FXD COMP 51 OHM 5 0 25W 01121 5105 R286 315 0391 00 10100 8010124 RES FXD COMP 390 OHM 5 0 25W 01121 3915 R286 315 0271 00 8010125 RES FXD COMP 270
15. 4745 R895 315 0125 00 RES FXD COMP 1 2M 5 0 25 01121 1255 R897 315 0154 00 RES FXD COMP 150K 5 0 25 01121 1545 R898 321 0344 00 RES FXD FILM 37 4K OHM 1 0 125W 75042 CEATO 3742F R900 315 0473 00 RES FXD COMP 47K OHM 5 0 25W 01121 4735 R904 315 0473 00 RES FXD COMP 47K OHM 5 0 25W 01121 4735 R906 315 0473 00 RES FXD COMP 47K OHM 5 0 25W 01121 CB4735 R942 308 0450 00 RES FXD WW 70 OHM 1 3W 91637 RS2B B70OROOF R981 315 0470 00 RES FXD COMP 47 OHM 5 0 25W 01121 4705 R983 315 0271 00 RES FXD COMP 270 OHM 5 0 25W 01121 2715 R985 315 0102 00 RES FXD COMP 1K OHM 5 0 25W 01121 1025 R987 315 0184 00 RES FXD COMP 180K OHM 5 0 25W 01121 1845 R989 321 0232 00 RES FXD FILM 2 55K OHM 1 0 125W 75042 CEATO 2551F R990 321 0260 00 RES FXD FILM 4 99K OHM 1 0 125W 75042 CEATO 4991F R992 315 0272 00 RES FXD COMP 2 7K 5 0 25 01121 2725 561 260 1227 01 SWITCH PUSH DP 2 BUTTON 80009 260 1227 01 511 105 0352 00 ACTUATOR CAM SW A TRIG SENSITIVITY 80009 105 0352 00 57 5893 260 1227 01 SWITCH PUSH DP 2 BUTTON 80009 260 1227 01 595 260 1132 00 SWITCH PUSH 1 BUTTON DOUBLE POLE 80009 260 1132 00 51064 260 1227 01 SWITCH PUSH DP 2 BUTTON 80009 260 1227 01 105 0352 00 ACTUATOR CAM SW B TRIG SENSITIVITY 80009 105 0352 00 6157 51896 260 1227 01 SWITCH PUSH DP 2 BUTTON 80009 260 1227 01 52217 670 2171 00 SWITCH PUSH MODE 80009 670 2171 00 6233
16. SLOPE COWL SOURCE 1 coupl P INPUT qan PERERIN n 2 ine 2 sa 5 DISPLAYED WAVEFORM OUTPUT Connector Provides an output for monitoring the PSEUDO GATE CH signal or TRUE Displayed Waveform Selector TRUE GATE The main gate waveform The repetition rate of the TRUE GATE isa function of the DISPLAY TIME setting CH B The conditioned signal derived from the output of the channel B shaper circuit PSEUDO GATE A high repetition rate replica of the TRUE GATE x These signals may be displayed on the CRT when the 7015 is used in a mainframe vertical compartment POSITION Screwdriver Control Sets the position of the signal displayed on the CRT TORAGE and DISPLAY TIME en STORAGE Switch ON The 7D15 stores the digital display of the previous measurement until the end of the next measurement and then updates the display OFF The 7D15 provides a continuous display during the counting process DISPLAY Control The display time variable control holds the displayed digital reading for a period of 0 1 s to 5 s In the fully clockwise position the display is held indefinitely 5 Figure 2 3 2 4 Operating Instructions 7D15 FRONT PANEL CONTROLS AND CONNECTORS was 2 mb a TRUE GATE
17. TN T X1000 AVERG CLOCK 10 ns 100 10 us 100 ns 10 ns 100 ps 10 ps HOHMH3 LNANSYNSVAW ASVO 1SHOM Specifications 7D 15 100 ns 1 us 10 us 100 us 1 ms 10 ms 100 ms 1s 10s 10 ns INPUT PERIOD Fig 1 5 7D15 Period mode accuracy stated in time 1432 5 1 11 Specifications 7D 15 up anman EEE T e pe 52 v A ee a 1 ism g ppm I M AMEN 4 o n oA tt ri EIND Su 1 Sa CM 1 H3429 1 H r rO BH v Am ALI mmn 12 ir Z a Tr P r11 F ll MF rity tt J d Aaa EP 31 4 gu UI A gt a 172 44 5 poer t 2 ry TT t 7 Ill T I A 7 TTA Ebo 90 D am 2 j 1 EEE EH rd Ll L 244 ll 1
18. ww RES a e ei qr ag t e 1 VS gar 27 fe 7 aans 225MHz UNIVERSAL E COUNTER TIMER n N e l Mm rcgia A Input Connector When selected provides a means for connecting the trigger signal A ARM Jack Gates the A Input A logical Lo gates the A Input off and a logical Hi gates the A Input on SLOPE Switch Selects whether the positive or negative going slope of the signal is to be used as a trigger The inward position of the SLOPE switch selects the positive slope and the outward position of the SLOPE switch selects the negative slope COUPL Switch Selects the input coupling to be used The outward position of the COUPL switch connects both the DC and AC component of the A Input to the attenuator The inward position allows only frequencies above approximately 5 Hz to pass P P SENS 1V 1V 10V Positions Selects the sensitivity of channel A trigger amplifier TRIG SOURCE Position Selects the internal vertical amplifier trigger signal when installed in the horizontal compartment LEVEL Control Controls the DC trigger level of the channel A trigger amplifier The PRESET position LEVEL control fully clockwise sets the DC trigger level to O volts TRIG LEVEL Jack May be used to monitor the DC trigger level or when the P P SENS switch is in the TRIG SOURCE position the TRIG LEVEL jack can be used to externally set the DC trigger level
19. CROSS INDEX MFR CODE NUMBER TO MANUFACTURER MANUFACTURER AMP Inc Spectra Strip Corp and Components Inc Amerace Ltd Berg Electronics Inc Gavitt Wire and Cable Division of RSC Industries Inc Transcon Mfg Co Specialty Connector Co Inc National Rivet and Mfg Co USM Corp Parker Kalon Fastener Div Allen Mfg Co Cambridge Thermionic Corp Fischer Special Mfg Co Holo Krome Co Bunker Ramo Corp The Amphenol RF Div Pheoll Manufacturing Co Division ef Allied Products Corp Illinois Tool Works Inc Shakeproof Division Wrought Washer Mfg Co Tektronix Inc Grayhill Inc Central Screw Co Gavitt Wire and Cable Division of RSC Industries Inc Penn Fibre and Specialty Co Inc N L Industries Inc Southern Screw Div Industrial Retaining Ring Co Sealectro Corp ADDRESS Box 3608 7100 Lampson Ave 103 Morse Street 10 Esna Park Dr Youk Expressway 455 N Quince St 2655 Perth St 3560 Madison Ave 1 21 East Jefferson St 1 Peekay Drive Drawer 570 445 Concord Ave 446 Morgan St 31 Brook St West 33 E Franklin St 5700 W Roosevelt Rd St Charles Road 2100 S O Bay St Box 500 561 Hillgrove Ave 2530 Crescent Dr Central St 2032 E Westmoreland St Box 1360 57 Cordier St 225 Hoyt CITY STATE ZIP Harrisburg PA 17105 Garden Grove CA 92642 Watertown MA 02172 Markham Ontario Canada New Cumberla
20. EXT CLOCK SHAPER CLOCK ss RESET BIS EXTERNAL RESET Teen RESET 7015 qoal OUTPUT 016 5 00 CLOC 79A Bp AMPLIFIER 6444 PHASE 6 MH pETECTOR de ee CROAI Q653A B GATING EXT RESET GENERATOR EXT RESET 475 TO SET INITIATE U478D GENERATOR U2GGA ULG8D DISPLAY TIME DISPLAY TIME Q255 Q258 U2Z 4A DISPLAYED SUTPUT WAVEFORM DISPLAYED SWITCHING WAVEFORM OUTPUTS Q303 U235A B C 300 T 320 Q332 SIGNAL Q 36 our Q 439 Bil Th42 POSITION A15 TRIGGER OUT BIS M B t OM 8 DECADE DECADE m COUNTER STORAGE REGISTER OR Q703 911 9705 0715 Q709 Q7n 5 9117 907 0401 5 94045 41 gt coL A37 CH ANALOG TIME atoT PULSES DISPLAY DISPLAY INVERTER UPDATE alas OVERFLOW am DETECTOR Hike GENERATOR ROW Q773 4744 gt UT9I0A 8 U540A B D A22 BUSY CH ROW SWITCHING CORRE MT COL SASS LOGIC GENERATORS 2 THRU ANALOG Qa usao 2 U7900 984 B38 TIME SLOT 1 10 TIME SLOT PULSES PULSES ATING COUNTERS amp READOUT BLOCK DIAGRAM ie mus CJ cJ CJ LJ CJ C2 L3 CJ LJ C13 C C C39 C
21. 1432 8 Figure 2 1 ao Operating Instructions 7D15 FRONT PANEL CONTROLS AND CONNECTORS GATE OFF UN E CH Eger p MC 8 MODE TIME AVERG CLOCK By E BI BE 4 DISPLAY TIME BB orm PERIOD Tins EN m oti wo B timig 10 a lug fas raj d FARO E Vas 52 1000 TRUE BATE EXT CLOCK IN CLOCK OUT fms Jore do j d Laval TRIGGER cim que no mm Lr E cen te d TIS SOURCE coum B 13 i Si GPE COUPL j i AC a m n f i eee 2 1 NW A Tc ba i See fe s Bet 225MHz UNIVETSTI COUNTER TIMER 7016 Input Connector When selected provides a means for connecting the trigger signal B ARM Jack Gates the B Input A logical Hi gates the B Input off and a logical Lo gates the A Input on SLOPE Switch Selects whether the positive or negative going slope of the signal is to be used as a trigger The inward position of the SLOPE switch selects the positive slope and the outward position of the SLOPE switch selects the negative slope COUPL Switch Selects the input coupling to be used The outward position of the COUPL switch connects both the DC and AC component of the B Input to the attenuator The inward position allows only frequencies above approxim
22. 4 H A FIGURE 1 EXPLODED CONT 123465 EYELET METALLIC 0 126 OD X 0 23 INCH L BRS WIRE ELECTRICAL 2 WIRE ELECTRICAL 3 WIRE ELECTRICAL 4 WIRE ELECTRICAL 5 WIRE ELECTRICAL 6 HOLDER TERM CON 1 HOLDER TERM CON 2 HOLDER TERM CON 3 HOLDER TERM CON 4 HOLDER TERM CON 5 HOLDER TERM CON 6 WIRE WIRE WIRE WIRE WIRE WIRE WIRE WIRE WIRE WIRE WIRE Name amp Description RIBBON RIBBON RIBBON RIBBON RIBBON BLACK BLACK BLACK BLACK BLACK BLACK Mfr Code 80009 23499 08261 08261 23499 83501 80009 80009 80009 80009 80009 80009 Mfr Part Number 210 0775 00 TEK 175 0825 00 TEK 175 0826 00 175 0827 00 175 0828 00 175 0829 00 352 0171 00 352 0169 00 352 0161 00 352 0162 00 352 0163 00 352 0164 00 7015 UNIVERSAL COUNTER TIMER L 513
23. 529 case 274 gt 27 20 gt 26 25 lt 225 e HOLD U41 PING 22 FROM UZD d DIAG 1 l Ii AUX DIAS DIAG 3 AUX TRIG IN 2 lt 2 TRIG IN TRIG IN TRIG IN 4 5 20 o Q ios TO 71 DIAG gt DIAG lt gt 9 lt 219 la 15 5Y 4 9 le 15 5V 2240 i I7 2 AE TS U4T78D PIN 15 DIAG 4 lt Qe gt 14 lec 2 ee T 15 lt SWEEP RESET 4 15 15V TRIG OUT I8 EROM RAAR FROM R 4qa 13 DIAG DIAG I2 amp up GND 512 SIGNAL OUT SIGNAL OUT 15 From Q352 FROM lI DIAG gt DIAG IO 1 T ID COMPENSATION 9 9 5V LIGHTS 59 8 sv 78 1 lt 53 T T ec 28 I amp OAF 5 n 5 lt 25 F980 1480 0 15 1564 H 4C gt 4 34 53 UTILITY com 2 t gt SWEEP GATE e t 21 PARTIAL AG INTERFACE BOARD ce CONNECTOR TO MAINFRAME 7015 OCPL I5y 71 5V 5V an il CDCPL 30 case T J cone e F 344 BeAr ar ED 5v gt 15 T 1 15 au 24 I5V DCPL pcPL PARTIAL TIME BASE BOARD SEE Q gt lt gt PARTIAL Al GATE SWITCH BOARD SEE ARTIAL AG INTERFACE BOAR
24. Q490 and U478A are used in addition to the previously discussed reset lines to accommodate the various modes of operation When the gate switch is placed into the OFF position or taken out of the OFF position the averaging counters are reset and U409A is set When the gate switch is set to OFF and when not in the FREQ mode the averaging counters are reset and U409A is set and held This is to allow frequency ratio measurements READOUT THEORY GENERAL The 7D15 displays its readout on the upper and lower portion of the oscilloscope crt The upper readout con tains the numerals decimal point and overflow indicator gt The lower word location gives the units in which the measurements are made MHz us EVENTS etc The upper readout Channel 1 readout is discussed first Tektronix 7000 Series readout systems contain time slot pulses corresponding to each letter of signal in a word Ten timeslots are available for each word A row and a column current return line is associated with each word location In the case of the 7D15 there are two word locations available the upper crt readout and the lower crt readout All thatis required to encode aletter or signalis to connect the correct value resistors between the desired time slot and the row and column return lines The value of the resistors determine the current flowing into the row and column return lines The matrix Figure 3 6 shows the row and column currents necessary to
25. 0 25W 01121 1035 R369 315 0331 00 RES FXD COMP 330 OHM 5 0 25W 01121 3315 R372 315 0102 00 RES FXD COMP 1K OHM 5 0 25W 01121 1025 R373 315 0472 00 RES FXD COMP 4 7K OHM 5 0 25W 01121 4725 R376 315 0511 00 RES FXD COMP 510 OHM 5 0 25W 01121 5115 R378 315 0750 00 RES FXD COMP 75 OHM 5 0 25W 01121 7505 379 315 0121 00 RES FXD COMP 120 OHM 5 0 25W 01121 1215 R381 315 0332 00 RES FXD COMP 3 3K OHM 5 0 25W 01121 3325 R382 315 0302 00 RES FXD COMP 3K OHM 5 0 25W 01121 3025 R384 315 0271 00 RES FXD COMP 270 OHM 5 0 25W 01121 2715 R386 315 0621 00 RES FXD COMP 620 OHM 5 0 25W 01121 6215 R387 315 0301 00 RES FXD COMP 300 OHM 5 0 25W 01121 3015 R388 315 0622 00 RES FXD COMP 6 2K OHM 5 0 25W 01121 CB6225 R389 315 0332 00 RES FXD COMP 3 3K OHM 5 0 25W 01121 3325 390 315 0302 00 RES FXD COMP 3K 5 0 25 01121 CB3025 R391 315 0181 00 RES FXD COMP 180 OHM 5 0 25W 01121 1815 R392 315 0331 00 RES FXD COMP 330 OHM 5 0 25W 01121 CB3315 R393 315 0102 00 RES FXD COMP 1K 5 0 25 01121 1025 6 13 Electrical Parts List 7D15 Tektronix Serial Model No Ckt No Part No Eff R394 315 0201 00 R395 315 0511 00 R396 315 0241 00 R397 315 0751 00 R399 315 0391 00 R403 315 0821 00 R404 315 0102 00 R406 315 0271 00 R407 315 0181 00 R410 315 0821 00 R411 315 0102 00 R413 315 0821 00 R414 315 0102 00 R416 315 0511 00 R417 315 0102 00 R419
26. 0035 1 C980 290 0248 01 CAP PXD ELCTLT 150UF 20 15V 56289 1500157 001552 C981 283 0177 00 CAP FXD CER DI 1UF 480 20 25V 72982 8131 0396511052 C992 283 0128 00 CAP FXD CER DI 100PF 5 500V 72982 871 536T2H101J C995 290 0139 00 CAP FXD ELCTLT 180UF 20 6V 06751 TS3K6 187 C996 290 0530 00 CAP FXD ELCTLT 68UF 20 6V 90201 TDC686MOO6FL C997 283 0198 00 CAP FXD CER DI 0 22UF 20 50V 72982 8131N075651224M CR20 152 0153 00 SEMICOND DEVICE SILICON 15V 50MA 13715 FD7003 CR21 152 0246 00 SEMICOND DEVICE SILICON 400PIV 200MA 07910 CD12676 CR22 152 0246 00 SEMICOND DEVICE SILICON 400PIV 200MA 07910 CD12676 CR23 152 0153 00 SEMICOND DEVICE SILICON 15V 50MA 13715 FD7003 CR120 152 0153 00 SEMICOND DEVICE SILICON 15V 50MA 13715 FD7003 CR121 152 0246 00 SEMICOND DEVICE SILICON 400PIV 200MA 07910 CD12676 CR122 152 0246 00 SEMICOND DEVICE SILICON 400PIV 200MA 07910 12676 CR123 152 0153 00 SEMICOND DEVICE SILICON 15V 50MA 13715 FD7003 CR167 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR168 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR169 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR203 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR233 152 0075 00 SEMICOND DEVICE GE 25V 40MA 14936 GD238 CR234 152 0075 00 SEMICOND DEVICE GE 25V 4 14936 GD238 CR235 150 1004 00 LAMP LED RED 2 5V 15MA 08806 551 12 CR251 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR262 152
27. 72982 72982 56289 56289 72982 72982 72982 90201 72982 72982 Mfr Part Number 670 2169 00 670 2171 00 670 2172 00 670 2170 00 670 2168 00 670 2165 00 670 2165 01 670 2167 00 670 2166 00 40C287A2 40C287A2 8131N401X5R473K 307 1014 00 307 1014 01 307 1013 00 307 1013 01 831 516 102 831 516 102 162D225x0020CD2 40C287A2 301 000H3MO100D 855 547 1032 301 002 0 0180 105 050 5 855 535U2J101J 855 547E1032 855 547 1032 855 547 1032 301 000 020229 301 000C0J0229C 40C287A2 8131N401X5R473K 307 1014 00 307 1014 01 307 1013 00 307 1013 01 831 516E102P 831 516E102P 162D225X0020CD2 40C287A2 301 000H3MO100D 855 547 1032 301 002C0G0180K 105 050 5 855 535U2J101J 855 547E1032 6 3 Electrical Parts List 7D15 Ckt No C160 C163 C169 C174 181 191 192 205 C208 C213 215 216 219 C255 C261 C263 C273 C284 C285 C310 C313 C316 C322 C323 C330 C334 C336 C428 C443 C456 C472 C479 C481 C484 C491 C516 C532 C533 C577 C581 C602 C603 C617 C637 C638 C640 C641 C644 C688 C696 C720 C728 C732 C735 C741 Tektronix Part No 283 0003 00 283 0003 00 283 0003 00 281 0604 00 281 0604 00 283 0003 00 290 0527 00 281 0617 00 290 0530 00 281 0617 00 283 0003 00 281 0662 00 283 0111 00 290 0573 00 283 0003 00 283 0003 00 283 0000 00 283 0023 00 283 0076 00 283 0000 00 283 0003 00 281
28. 7D15 DECIMAL DECIMAL ae i an a x z 25 ao a DECIMAL gt u 2 a i LL q a X cc J LL l co 4 lt gt qd e e 2 OPERATIONAL ADDRESS COLUMN NUMBER CURRENT MILLI ROW AMPERES NUMBER 1195 25 Fig 3 6 Character Selection Matrix for 7000 Series Readout System 3 11 Circuit Description 7D15 CH 2 COLUMN ROW DATA Refer to Diagram 6 Column converter U890 and Row converter U898 provide appropriate column and row currents when one or more inputs pins 1 through 13 and pin 20 receive a low and in turn are interrogated by time slot pulses applied to pins 14 15 16 and 17 Various symbols and combinations of symbols have been given word designations and are shown in a matrix See Fig 3 7 With the NORM switch depressed current is steered to the inputs of the Column and Row converters by TIME AVERAGE switch S599 and CLOCK switch S699 which select the desired character or possible combinations of characters for display on the crt Depressing the FREQ button and cancelling the NORM button will produce the EVENTS character With the FREQ B button depressed a high is placed at the bases of Q815 through Q821 turning those transistors on which in turn pull down on the bases of Q823 through Q861 turning them all off Pin
29. FXD CER DI 0 001UF 4100 0 500V 72982 831 516 102 C761 283 0000 00 CAP FXD CER DI 0 001UF 100 0 500V 72982 831 516 102 C764 283 0000 00 CAP FXD CER DI 0 001UF 100 0 500V 72982 831 516 102 775 283 0000 00 CAP FXD CER DI 0 001UF 100 0 500V 72982 831 516 102 779 283 0076 00 CAP FXD CER DI 27PF 10 500V 56289 40C287A2 C801 283 0023 00 CAP FXD CER DI 0 1UF 80 20 10V 56289 20 374 C890 283 0003 00 CAP FXD CER DI 0 01UF 80 20 150V 72982 855 547 1037 931 290 0527 00 CAP FXD ELCTLT 15UF 20 20V 90201 TDCl156MO20FL C932 290 0527 00 FXD ELCTLT L5UF 20 20V 90201 TDC156M020FL C933 283 0003 00 CAP FXD CER 0 010 80 20 150 72982 855 547 1032 C936 290 0530 00 CAP FXD ELCTLT 68UF 20 6V 90201 TDC686MOO6FL C939 290 0527 00 FXD ELCTLT 15UF 20 20V 90201 TDC156M020FL c940 290 0530 00 CAP FXD ELCTLT 68UF 20 6V 90201 TDC686MOO6FL C941 290 0534 00 CAP FXD ELCTLT 1UF 20 35V 56289 196D105X0035HA1 C944 290 0532 00 CAP FXD ELCTLT 150UF 20 6V 90201 TDC157MOO6CL C945 283 0003 00 CAP FXD CER DI 0 01UF 480 20 150V 72982 855 547 1032 C947 283 0003 00 CAP FXD CER DI 0 01UF 80 20 150V 72982 855 547 1032 C948 290 0530 00 CAP FXD ELCTLT 68UF 205 6V 90201 TDC686MOO6FL C950 290 0530 00 FXD ELCTLT 68UF 20 6V 90201 TDC686MOO6FL 951 290 0530 00 CAP FXD ELCTLT 68UF 20 6V 90201 TDC686MO06FL C954 290 0534 00 CAP FXD ELCTLT 1UF 20 35V 56289 1960105
30. When the MODE switch is in the FREO position however the A Input is used to turn the main gate on and off NORM Pushbutton When this button is depressed the MODE switches control the main gate in the normal manner ON Pushbutton When this button is depressed the 7D15 main gate is held on When in the PERIOD A TIM WIDTH or TIM Mode the 7D 15 counts at the rate selected by the CLOCK switch When in the FREQ mode the 70 15 counts events present at the B Input connector 1432 11 IN J Figure 2 4 co 2 5 Operating Instructions 7D 15 TIME FRONT PANEL CONTROLS AND CONNECTORS MODE TIME AVERG CLOCK B 34 4 OU A EODEM x DISPLAY TIME 0m a o Wns ag xu E EXC E tus Sus fid Was r 10s ag 88 EXT CLUEK IN CLOCK OUT s j 3 3 E AESET 9 ty m 4 Hus TRIGGER i34 P P ax 7 TRIS e SOURCE a 4 B a our DUT BE OUT INPUT A OUTOC Gur 1E y 14 SLOPE H pour SOURCE COUPL SLOPE l 41 AC INPUT B p 3 md pr me es axe s LEVEL LEVEL ER Wa ARM a te ARM A a T 225MHz UNIVERSAL i 2 COUNTER TIMER PERIOD A The 7015 triggers on the slope and level sele
31. and to give you the benefit of the latest circuit improvements developed in our engineering department It is therefore important when ordering parts to include the following information in your order Part number instrument type or number serial number and modification number if applicable If a part you have ordered has been replaced with a new or improved part your local Tektronix Inc Field Office or representative will contact you concerning any change in part number Change information if any is located at the rear of this manual SPECIAL NOTES AND SYMBOLS 000 Part first added at this seria number Part removed after this serial number ITEM NAME In the Parts List an Name is separated from the description by a colon Because of space limitations an Item Name may sometimes appear as incomplete For further Item Name identification the U S Federal Cataloging Handbook H6 1 can be utilized where possible ABBREVIATIONS ACTR ACTUATOR PLSTC PLASTIC ASSY ASSEMBLY QTZ QUARTZ CAP CAPACITOR RECP RECEPTACLE CER CERAMIC RES RESISTOR CKT CIRCUIT RF RADIO FREQUENCY COMP COMPOSITION SEL SELECTED CONN CONNECTOR SEMICOND SEMICONDUCTOR ELCTLT ELECTROLYTIC SENS SENSITIVE ELEC ELECTRICAL VAR VARIABLE INCANDESCENT WW WIREWOUND LED LIGHT EMITTING DIODE XFMR TRANSFORMER NONWIR NON WIREWOUND XTAL CRYSTAL 6 1 Electrical Parts List 7D15 MFR CODE 01121 01295 02735 03508 04713 07
32. representation of the 7D15 gate signal Changed by resistor alteration True Gate 20 nanoseconds Pseudo Gate 18 nanoseconds CH 16 nanoseconds 1 5 Specifications 7D15 TABLE 1 1 cont Characteristics Performance Requirements Supplemental Information p T Displayed gate width to Matches to within 1 nanosecond depends effective gate width on correct calibration of horizontal time base used In Freq or events gt 1 nanosecond operation lead time required of gate display over CH B display to guarantee proper accumulation or non accumulation of count External Display Located on front panel same as analog display except position and amplitude controls have no effect Amplitude Logic 1 0 5 volt 10 into 50 ohms Logic 0 lt 0 volt into 50 ohm TTL compatible without 50 ohm load 1 6 milliamper current capability Rise and Falltime gt 1 5 nanoseconds with 50 ohm load Propagation delay from True Gate 21 nanoseconds input BNC s to display Pseudo Gate 19 nanoseconds CH B amp 17 nanoseconds True Gate amp Pseudo Matches to within 1 nanosecond output pulse width to Effective Gate Busy Signal located on Nominally TTL compatibility positive Rear Interface A22 logic Rise and Falltime 100 nanoseconds maximum Delay After Reset Command 150 nanoseconds maximum DISPLAYS Gate Indicator A
33. 0911 00 8 010125 RES FXD COMP 910 OHM 5 0 25W 01121 9115 R175 315 0162 00 RES FXD COMP 1 6K OHM 5 0 25W 01121 1625 R176 315 0111 00 RES FXD COMP 110 OHM 5 0 25W 01121 1115 R178 315 0200 00 RES FXD COMP 20 OHM 5 0 25W 01121 2005 R180 315 0102 00 RES FXD COMP 1K OHM 5 0 25W 01121 1025 R182 315 0162 00 RES FXD COMP 1 6K OHM 5 0 25W 01121 1625 R183 315 0111 00 RES FXD COMP 110 OHM 5 0 25W 01121 CB1115 R187 315 0563 00 RES FXD COMP 56K 5 0 25 01121 5635 R189 315 0153 00 RES FXD COMP 15K 5 0 25 01121 1535 R201 315 0510 00 RES FXD COMP 51 OHM 5 0 25W 01121 5105 R203 321 0114 00 RES FXD FILM 150 OHM 1 0 125W 75042 CEATO 1500F R205 315 0750 00 RES FXD COMP 75 OHM 5 0 25W 01121 7505 R207 315 0821 00 RES FXD COMP 820 OHM 5 0 25W 01121 8215 R208 315 0330 00 RES FXD COMP 33 OHM 5 0 25W 01121 3305 R209 315 0821 00 RES FXD COMP 820 OHM 5 0 25W 01121 CB8215 R211 315 0510 00 RES FXD COMP 51 OHM 5 0 25W 01121 5105 R214 315 0100 00 RES FXD COMP 10 OHM 5 0 25W 01121 1005 R216 321 0034 00 RES FXD FILM 22 1 OHM 1 0 125W 75042 CEATO 22R10F R218 321 0069 00 RES PXD FILM 51 1 OHM 1 0 125W 75042 CEATO 51R10F R225 315 0223 00 RES FXD COMP 22K OHM 5 0 25W 01121 2235 R229 315 0622 00 RES FXD COMP 6 2K OHM 5 0 25W 01121 6225 R240 315 0223 00 RES FXD COMP 22K OHM 5 0 25W 01121 2235 R242 315 0223 00 RES FXD COMP 22K OHM 5 0 25W 01121
34. 0912 00 315 0511 00 315 0223 00 315 0103 00 315 0103 00 315 0222 00 315 0272 00 315 0391 00 315 0273 00 315 0102 00 315 0474 00 315 0752 00 315 0511 00 315 0752 00 315 0681 00 315 0163 00 Serial Model Name amp Description RES FXD COMP 820 OHM 5 0 25W RES FXD COMP 820 OHM 5 0 25W RES FXD COMP 820 OHM 5 0 25W RES FXD COMP 1K OHM 5 0 25W RES FXD COMP 1K OHM 5 0 25W RES FXD COMP 510 OHM 5 0 25W RES FXD COMP 1 2K OHM 5 0 25W RES FXD COMP 3 9K OHM 5 0 25W RES FXD COMP 2K OHM 5 0 25W RES FXD COMP 2 4K OHM 5 0 25W RES FXD COMP 5 1K OHM 5 0 25W RES FXD COMP 22K OHM 5 0 25W RES FXD COMP 510 OHM 5 0 25W RES FXD COMP 3 3K OHM 5 0 25W RES FXD COMP 2K OHM 5 0 25W RES FXD COMP 2K OHM 5 0 25W RES FXD COMP 3K 5 0 25 RES FXD COMP 820 OHM 5 0 25W RES FXD COMP 560 OHM 5 0 25W RES FXD FILM 4 02K OHM 1 0 125W RES FXD COMP 820 OHM 5 0 25W RES FXD COMP 510 OHM 5 0 25W RES FXD COMP 390 OHM 5 0 25W RES FXD COMP 3 6K OHM 5 0 25W RES FXD COMP 1 5K OHM 5 0 25W RES FXD COMP 1 8K OHM 5 0 25W RES FXD COMP 1K OHM 5 0 25W RES FXD COMP 470 OHM 5 0 25W RES FXD COMP 1 2K OHM 5 0 25W RES FXD COMP 3 9K OHM 5 0 25W RES FXD COMP 1K OHM 5 0 25W RES FXD COMP 4 7K OHM 5 0 25W RES FXD COMP 4 7K OHM 5 0 25W RES FXD COMP 47K OHM 5 0 25W RES FXD COMP 8 2K OHM 5 0 25W _ RES FXD COMP 22K OHM 5 0 25W RES FXD COMP
35. 2 volts or greater Logic 0 0 5 volt or less gt 500 nanoseconds 10 volts to 10 volts 100 nanoseconds or less 15 volts Supplemental information Negative going transition TTL compatible pulse lt 100 nanoseconds 500 nanoseconds TTL compatible negative logic signa lt 200 nanoseconds lt 100 nanoseconds Characteristics INTERNAL TIME BASE Crystal Oscillator Frequency Accuracy 0 C to 50 C Long Term Drift OUTPUT SIGNALS Monitor Signals Clock Out A and B Trigger Level Externally Programable with 5 volt Signal maximum and in the Preset Position Analog Display Internally Connected Position Amplitude Rise and Falltime Propagation delay Input BNC s to plug in interface TABLE 1 1 cont Performance Requirements Within 0 5 part per million 1 part or less in 107 per month Logic 1 0 5 volt 10 into 50 ohms Logic 0 lt 0 volt into 50 ohms TTL compatible without 50 ohm load 1 6 milliamper current capacity Zout 1 kilohm Vout 20 5 volt into 1 megohm 10X scaling Front panel switch selects either True Gate signal Pseudo Gate or Channel B out Controlled by front panel screwdriver control 1 0 division Can be set from 0 2 to 1 div 20 Less than 2 nanoseconds Specifications 7D15 Supplemental Information 5 megahertz Zout 430 ohms The Pseudo Gate signal is a high speed
36. 315 0512 00 R422 315 0472 00 R423 315 0103 00 R425 315 0102 00 R426 315 0103 00 R428 315 0510 00 R430 315 0391 00 R432 315 0101 00 R434 315 0271 00 R436 315 0391 00 R438 315 0101 00 R439 315 0151 00 R440 315 0101 00 R441 315 0123 00 R443 315 0102 00 444 315 0473 00 R445 315 0911 00 8010100 8 059999 R445 315 0681 00 060000 R448 315 0511 00 R449 315 0681 00 R452 315 0302 00 R453 315 0222 00 R454 315 0102 00 R456 315 0511 00 R458 315 0223 00 030000 R459 315 0102 00 R461 315 0821 00 R464 315 0821 00 R467 315 0391 00 R472 315 0822 00 R473 315 0473 00 R475 315 0103 00 R477 315 0223 00 R481 315 0391 00 R483 315 0391 00 R485 315 0470 00 R488 315 0102 00 493 315 0102 00 495 315 0271 00 R497 315 0821 00 6 14 Name amp Description RES FXD COMP 200 OHM 5 0 25W RES FXD COMP 510 OHM 5 0 25W RES FXD COMP 240 OHM 58 0 25W RES FXD COMP 750 OHM 5 0 25W RES FXD COMP 390 OHM 5 0 25W RES FXD COMP 820 OHM 5 0 25W RES FXD COMP 1K OHM 5 0 25W RES FXD COMP 270 OHM 5 0 25W RES FXD COMP 180 OHM 5 0 25W RES FXD COMP 820 OHM 5 0 25W RES FXD COMP 1K OHM 5 0 25W RES FXD COMP 820 OHM 5 0 25W RES FXD COMP 1K OHM 5 0 25W RES FXD COMP 510 OHM 5 0 25W RES FXD COMP 1K OHM 5 0 25W RES FXD COMP 5 1K OHM 5 0 25W RES FXD COMP 4 7K OHM 5 0 25W RES FXD COMP 10K OHM 5 0 25W RES FXD COMP 1K OHM 5 0 25W RES FXD COMP 10K OHM 5 0 25W RES FXD COMP 51 OHM 5 0 25W RES FX
37. B TRIGGER controls select the point on the waveform that turns the main gate off See Fig 2 7d Period Measurements and Period Averaging 7015 measures periods from 10 ns to 105 s Up to 1000 periods can be averaged to obtain a resolution of up to 10 ps The period mode measures the time between two points on a waveform These two points are selected by the TRIGGER controls such that the counter main gate turns on and off at the point selected by the level and slope controls see Fig 2 7a The period averaging mode holds the PERIOD pesce PERIOD AVERAGED X10 HYSTERESIS WINDOW SLOPE SLOPE PERIOD AVERAGED TIM WIDTH A A INPUT t INTERVAL TIME INTERVAL TIM A B 1432 13 Fig 2 6 Measurement intervals 2 7 Operating Instructions 7D 15 counter main gate on until 1 10 100 or 1000 periods are counted see Fig 2 7b Time Interval Averaging Averaging makes possible time interval measurement as short as six nanoseconds with a usable resolution up to 0 1 nanosecond This increased resolution is achieved by statistically reducing the 1 count error inherent in single shot time interval measurements The probability of obtaining the true value increases with the number of intervals averaged Time interval averaging can be used whenever several repetitive intervals are available The number of averages select
38. CLOCK RATE 10 ns AVERAGES 1000 1 25 gt E 3 1 00 75 a 50 25 00 RANGE ANSWERS ns TIME INTERVAL 11 ns CLOCK RATE 10 ns AVERAGES 1000 gt 5 e lt a 10 4 105 106 107 108 10 9 11 0 11 1 11 2 11 3 11 4 11 5 RANGE OF ANSWERS ns 0350 TIME INTERVAL 15 ns 0300 CLOCK RATE 10 ns Mm AVERAGES 1000 0250 0225 gt 0200 z E 0175 8 0150 amp 10125 0000 UR 144 145 14 6 14 7 14 8 14 9 15 0 15 1 15 2 15 3 15 4 15 5 RANGE OF ANSWERS ns THE ABOVE EXAMPLES ASSUME A UNIFORMLY RANDOM DISTRI BUTION OF TIMING COINCIDENCE rey Fig 2 8 Probability versus time interval 2 9 Operating Instructions 7D 15 500 AVERAGES 10 450 _TIME INTERVAL 11 400 CLOCK RATE 10 ns 350 gt I 300 ea lt 250 a 200 150 100 050 000 RANGE OF ANSWERS AVERAGES 100 7 TIME INTERVAL 11 ns CLOCK RATE 10 ns gt lt to cc RANGE ANSWERS ns 055 AVE RAGES 1000 050 TIME INTERVAL 11 ns 045 CLOCK RATE 10 040 PROBABILITY Co 000 10 4 10 5 10 6 10 7 10 8 10 9 11 0 11 1 112 113 11 4 11 5 RANGE OF ANSWERS ns THE ABOVE EXAMPLES ASSUME A UNIFORMLY RANDOM DISTRI BUTION OF TIMING COINCIDENCE 1432 16 Fig 2 9 Probability versus number of averages 2 10 The CLOCK OUT signal is viewed on the oscilloscope using an amplifier plug in unit The di
39. COMP 22K OHM 5 0 25W 01121 2235 R683 315 0223 00 RES FXD COMP 22K OHM 5 0 25W 01121 2235 R684 315 0102 00 RES FXD COMP 1K OHM 5 0 25W 01121 1025 R685 315 0392 00 RES FXD COMP 3 9K OHM 5 0 25W 01121 CB3925 R688 315 0101 00 RES FXD COMP 100 OHM 5 0 25W 01121 1015 R691 315 0391 00 RES FXD COMP 390 OHM 5 0 25W 01121 3915 R692 315 0471 00 RES FXD COMP 470 OHM 5 0 25W 01121 4715 R695 315 0241 00 RES FXD COMP 240 OHM 5 0 25W 01121 2415 R696 315 0101 00 RES FXD COMP 100 OHM 5 0 25W 01121 1015 R697 315 0431 00 RES FXD COMP 430 OHM 5 0 25W 01121 4315 R701 315 0102 00 RES FXD COMP 1K OHM 5 0 25W 01121 1025 R703 315 0751 00 RES FXD COMP 750 OHM 5 0 25W 01121 7515 R704 315 0391 00 RES FXD COMP 390 OHM 5 0 25W 01121 CB3915 R707 315 0122 00 RES FXD COMP 1 2K OHM 5 0 25W 01121 1225 709 315 0223 00 RES FXD COMP 22K OHM 5 0 25W 01121 2235 R710 315 0621 00 RES FXD COMP 620 OHM 5 0 25W 01121 6215 R711 315 0223 00 RES FXD COMP 22K OHM 5 0 25W 01121 2235 R713 315 0223 00 RES FXD COMP 22K OHM 5 0 25W 01121 2235 R714 315 0152 00 RES FXD COMP 1 5K 5 0 25 01121 1525 R715 315 0223 00 RES FXD COMP 22K OHM 5 0 25W 01121 CB2235 R717 315 0223 00 RES FXD COMP 22K 5 0 25 01121 CB2235 R718 315 0152 00 RES FXD COMP 1 5K OHM 5 0 25W 01121 1525 R720 315 0392 00 RES FXD COMP 3 9K OHM 5 0 25W 01121 3925 R723 315 0103 00 R
40. CONTACT ELEC 0 46 INCH LONG SHIELD LIGHT FOR LIGHTED PUSH SWITCH CLAMP LOOP LARGE STRAP TIE DOWN BOARD ASSY POWER SUPPLY SEE 8 EPL CKT BOARD ASSY INCLUDES CONTACT ELEC 0 188 INCH LONG CONTACT ELEC FOR 0 025 INCH SQUARE PIN CONTACT ELEC HORIZONTAL TERM TEST PT 0 40 INCH LONG CLIP ELECTRICAL FOR 0 25 INCH DIA FUSE SCREW EXT RLV B 4 40 X 0 375 INCH SST SPACER SLEEVE 4 40 X 0 105 INCH LONG CKT BOARD ASSY TIME BASE LOGIC SEE A7 EPL CKT BOARD ASSY INCLUDES OSCILLATOR SEE Y622 EPL ATTACHING PARTS SCREW MACHINE 4 40 X 0 312 INCH PNH STL WASHER NONMETAL 0 142 ID X 0 25 OD FIBER Fa POST ELEC MECH 4 40 X 0 187 X 0 125 INCH L CONTACT ELEC 0 365 INCH LONG CONTACT ELEC 0 188 INCH LONG CONTACT ELEC FOR 0 025 INCH SQUARE PIN SOCKET PIN CONN 0 145 INCH LONG TERM TEST PT 0 40 INCH LONG SWITCH SLIDE DPDT 0 5A 125VAC PL ELEC SHIELD 0 625 X 1 28 CD PL BRS SCREW EXT RLV B 4 40 X 0 375 INCH SST SPACER SLEEVE 0 25 OD X 0 34 INCH LONG CKT BOARD ASSY ATTENUATOR SEE A5 EPL ATTACHING PARTS SCR ASSEM WSHR 4 40 X 0 312 INCH PNH BRS BRACKET ANGLE BOARD ASSY INCLUDES CONTACT ASSY EL CAM SWITCH BOTTOM CONTACT ASSY EL CAM SWITCH TOP RIVET TUBULAR 0 051 OD X 0 115 INCH LONG CONTACT ELEC 0 145 INCH LONG CONTACT ELEC 0 188 INCH LONG SWITCH PUSH DP 2 BUTTON SWITCH PUSH 1 BUTTON DOUBLE POLE NUT BLOCK 0 281 SQ THREE 4 40 THR
41. Calibrator Volts 4 0 V Rate 1 kHz A Trigger Source Right Vert NOTE Waveforms shown are actual waveform photographs taken with a Tektronix Oscilloscope Camera System and Projected Graticule Vertical deflection factor shown on waveform is the actual deflection factor from the probe tip Voltages and waveforms on the diagrams shown in blue are not absolute and may vary between instruments because of component tolerances internal calibration or front panel settings Readouts are simulated in larger than normal type The spring tension of the pin sockets ensures a good connection between the cirucit board and pin This spring tension may be damaged by using the pin sockets as a connecting point for spring loaded probe tips alligator 8 TRIG LEVEL LEVEL 545 SHAPER 8 SLOPE SOURCE SWITCH CR 571 TIM B INPUT 15 42117 CH 5 INTERNAL TRIGGER Q203 64119 COUPLING ATTENUATOR 5 Sill 8y PASS AMPLIFIER 0240 U3e0c A ARM SWITCHING LE wes MA COUPLING 1225 TID M D GATE Q ATTENUATOR 56 Sit GENERATOR Ce A SLOPE SWITCH SHAPER Qes FREQ LEVEL TRIG LEVEL VERA ING INPUT pues CLOCK U49GA B 5544 U499A B XTAL ERG RESET Y 12 to INT I MHz UG 65 5 SELECTOR CLOCK
42. EXT CLOCK IN CLECE OUT tos 63 ce x we Es gem m N uT pc INPUT Sue SOURCE 1 INPUT eet 1 E 2 H i COUPL d T ma FRE 7 n en 3 p oy LEVEL A gt gt T E a m j i i D P 7 ARM ae 5 3 E up 225MHz UNIVERSAL COUNTER TIMER RESET and CLOCK 7015 RESET Pushbutton The momentary pushbotton switch initializes the instrument All counters are affected including the averaging circuits RESET Connector Provides a means for remotely resetting the 7D15 A logical Hi causes the 7D15 to initialize EXT CLOCK IN Connector Provides a means for connecting an external clock an in house standard or to Obtain a different measurement interval for FREO measurements To apply an external clock an internal slide switch located on the right side of the 7D 15 must be switched to the Ext position towards the rear 23 CLOCK OUT Connector Provides a means for monitoring the internal oscillator as selected by the CLOCK pushbuttons G D rm LIGHT The light indicates the state of the main gate When lit the main gate is 7D 15 is in the process of making a measurement When the light is extinguished the main gate is off OFF Pushbutton With this button depressed the 7D15 main gate is held off
43. Electronics Inc Nippon Communcation Equipment Co Sealectro Corp Centralab Semiconductor Centralab Electronics Div of Globe Union Inc ADDRESS 1201 2nd St South P O Box 5012 Route 202 Electronics Park 5005 E McDowell Rd 464 Ellis St 12515 Chadron Ave Nela Pk 103 Morse Street Commerce Drive 8700 E Thomas Rd 4300 Redwood Hwy 3301 Electronics Way 600 W John St 811 E Arques 8808 Balboa Ave 3560 Madison Ave Providence Pike 1501 Page Mill Rd 2536 W University St 644 W 12th St 33 E Franklin St 401 N Broad St P Box 500 6135 Magnolia Ave 561 Hillgrove Ave 3029 E Washington St P O Box 609 225 Hoyt 4501 N Arden Dr CITY STATE ZIP Milwaukee WI 53204 Dallas TX 75222 Somerville NY 08876 Syracuse NY 13201 Phoenix AZ 85036 Mountain View CA 94042 Hawthorne CA 90250 Cleveland OH 44112 Watertown MA 02172 Danbury CT 06810 M Scottsdale AZ 85252 San Rafael CA 94903 West Palm Beach FL 33401 Hicksville NY 11802 Sunnyvale CA 94086 San Diego 92123 Indianapolis IN 46227 Slatersville RI 02876 MG Palo Alto CA 94304 North Adams MA 01247 St Louis MO 63107 LM Erie PA 16512 Danbury CT 06810 Philadelphia PA 19108 Beaverton OR 97077 at Riverside CA 92506 La Grange IL 60525 Indianapolis IN 46206 Columbus NB 68601 Kawasaki Kanagawa Japan Mamaroneck 10544 El Monte CA 917
44. FROM DI AG 5 o I FROM DIAG Q R795 e CH CoLUMN Row DATA e V VO MOY NAN109 L HO 9 T e 481 W C R B TO VCRBO CERFACE PARTIAL CRATG w CR B S4 a EA E I L P I E Y Qas7 sion 258 T Sy BOARD me PARTIAL AG INTERFACE LII 4 a cu h T Me 0817 V m Q813 FREQ A 0821 ME muu RA N ES OR a 70 cox mE MEG NE i uM 44 SEE 1569 847 Reth U83430 08T G RETI A 4 AGB CR ST Us48 155 686 606 lt B T31 A335 wg AB o 3 B31 4 lt B Bx zs A54 gt bid TO T DIAG C A gt b15 RYO R4022 8904 2 aos 47K 41k FATIK 41K PARTIAL TIME EASE BOARD kL gt ALL VOLTAGES ARE DECOUPLED SEE FOR DETAILS SEE PARTS LIST FOR e SEMICONDUCTOR TYPES CH2 CoLuMN Row DATA cRALO ALT
45. LED lamp indicates internal gate condition Display Mode Switch Front panel switch allows selection 16 of readout follow or store Continuously variable from 0 1 second or less to approximately 5 seconds With contro in maximum clockwise position the display is held indefinitely Display Time Control Specifications 7D 15 TABLE 1 1 cont Characteristics Performance Requirements Supplemental Information ne E ee Readout 8 digits of display the four most signifi cant digits have zero suppression Overflow gt arrow Legend located on Channel 2 of readout system Resolution Minimum Frequency 0 1 hertz Per TIM 10 nanoseconds Multi per 10 picoseconds Multi TIM 100 picoseconds limited TABLE 1 2 ENVIRONMENTAL CHARACTERISTICS Refer to the specification for the associated oscilloscope TABLE 1 3 PHYSICAL CHARACTERISTICS Size Fits all 7000 Series plug in compartments Weight 3 1 Pounds 1 4 kilograms Specifications 7D 15 1 8 pp f Esa 5 pps CREARI e am d pr Eq 224 B p zE pg 5 INIT o z O20 ee IH HF 3s ea a 08 ES e CO Sot gt T lt 2 lt ox gt J pi Jug bg qa F g
46. OHM 5 0 25W 01121 2715 R288 315 0181 00 RES FXD COMP 180 OHM 5 0 25W 01121 1815 R289 315 0271 00 RES FXD COMP 270 OHM 5 0 25W 01121 2715 R291 315 0331 00 RES FXD COMP 330 OHM 5 0 25W 01121 3315 R293 315 0331 00 RES FXD COMP 330 OHM 5 0 25W 01121 3315 R296 315 0511 00 RES FXD COMP 510 OHM 5 0 25W 01121 5115 Electrical Parts List 7D15 Tektronix Serial Model No Mfr Ckt No Part No Eff Dscont Name amp Description Code Mfr Part Number R301 315 0222 00 RES FXD COMP 2 2K OHM 5 0 25W 01121 82225 R302 315 0473 00 RES FXD COMP 47K 5 0 25 01121 4735 R304 315 0473 00 RES FXD COMP 47K OHM 5 0 25W 01121 4735 R305 315 0222 00 RES FXD COMP 2 2K OHM 5 0 25W 01121 2225 R310 315 0361 00 RES FXD COMP 360 OHM 5 0 25W 01121 CB3615 R311 315 0332 00 RES FXD COMP 3 3K OHM 5 0 25W 01121 3325 R313 315 0511 00 RES FXD COMP 510 OHM 5 0 25W 01121 5115 R316 315 0101 00 RES FXD COMP 100 OHM 5 0 25W 01121 1015 R318 315 0271 00 RES FXD COMP 270 OHM 5 0 25W 01121 2715 R319 315 0750 00 RES FXD COMP 75 OHM 5 0 25W 01121 7505 R321 315 0750 00 RES FXD COMP 75 5 0 25 01121 7505 R323 315 0431 00 RES FXD COMP 430 OHM 5 0 25W 01121 4315 R328 311 1068 00 RES VAR NONWIR 5K OHM 10 0 50W 01121 W 7682 R330 315 0101 00 010100 BO59999 RES FXD COMP 100 OHM 5 0 25W 01121 1015 R330 315 0620 00 060000 RES FXD COMP 62 OHM 5 0 25W 01121 6205 R331 31
47. Q60 Q65 4 i The dc path for the input signal is provided by amplifier U43 The input signal is connected to the non inverted input of the operational amplifier through R44 R49 sets the quiescent dc operating level for amplifier U43 57 the LEVEL control is used to select the dc operating level of U43 J52 trigger level jack provides a means for monitor ing the level set by R57 or it can be used to provide an external trigger level A portion of the ac signal from Q38 is connected into the feedback loop of U43 to keep the output of both of the amplifiers constant throughout the 3 8 frequency range L41 couples the dc signal to the shaper and prevents U43 from degrading the high frequency performance of the AC Amplifier SHAPER The outputs of the AC and DC Amplifiers are connected to the Shaper circuit consisting of Q60 and Q65 a fast Schmitt Trigger VR67 and VR69 provide dc offset necessary to drive the following stage slope circuit SLOPE CIRCUITRY The signal from the Shaper circuit is connected to paraphase amplifiers Q72 Q74 and Q79 Q81 With S89 in the position Q72 and Q74 are held off Q87 is forward biased thus providing emitter current to Q79 and Q81 The signal is passed through T75 to the next stage With S89 in the position Q87 isturned off and emitter current is provided for Q72 and Q74 TIME BASE TIME STANDARD Refer to Diagram 4 The five megahertz crystal os cillator Y622 output is
48. Set the 7D15 controls as follows TIM WIDTH A MODE AVERG 1000 CLOCK 10 ns SLOPE A and B t in COUPL A and B AC in SOURCE INPUT B in P P SENS A and B AV d Connect the DVM between the A TRIG LEVEL jack and ground Use the A LEVEL control to adjust for 0 250 V e Check for a display readout of 10 00 ns 1 ns f Connect equipment as shown in Figure 5 4 using the 10 ns cable g Set the 7D15 A and B LEVEL controls to PRESET and the MODE switch to TIM 6 00 h Check for a readout display of 10 09 ns 1 ns i Disconnect all test equipment PULSE 7D15 GENERATOR LJ GR TO BNC B ADAPTER or CONNECTOR TO BNC ADAPTER 1433 10 Fig 5 4 Equipment setup used to check gt accuracy NOTE Use the Vertical Plug In unit to set the output amplitude of the Sine Wave Generator 1 13 INPUT TRIGGER SENSITIVITY CHECK a Connect a 225 MHz 150 mV peak to peak signal from the Sine Wave Generator to the 7D15 B FREQ IN connector through a Feed Through Termination b Set the 7D15 MODE switch to FREQ B the TIME switches to 10 ms and SOURCE to INPUT B c Check that the 7D15 can be triggered and that the displayed readout is 225 MHz d Change the Sine Wave Generator frequency to 100 MHz and move the output to the A input Calibration 7D15 e Set the 7D15 MODE to PERIOD A the AVERG switches to 1000 and the CLOCK to 10 ns f Check that the 7D15 can b
49. The signal path for U390 arrives via U286A U287C U290C U287D and to pin 9 of U374A and pin 9 of U374B U374B which was set prior to the start of the measurement cycle see Reset Circuitry is clocked by the 10 millisecond standard This causes pin 15 to go LO thus enabling U386D The 10 millisecond standard is also clocked through U374A inverted in U386C and passed through the enabling gate U386D Pin 15 of U386D therefore goes HI presenting a HI to the D input of U390 With the arrival of the unknown signal pin 3 Circuit Description 7D 15 of U390 goes LO thus enabling the main gate U386A which allows the unknown signal to be counted With the arrival of the next 10 millisecond clock pin 2 of U374A goes LO pin 15 of U386D goes LO and a LO is presented to the D input of U390 Pin 3 of U390 therefore goes HI with the next pulse from the unknown signal This enables the main gate U386A and stops the counting process INITIATE Prior to the second 10 millisecond clock U374B was determined to be LO This enabled U536B so that the second 10 millisecond pulse clocks U409A This causes pin 3 to go HI causing Q571 to turn on and Q574 to turn off The collector of Q574 goes HI is inverted in U530D and connects through U530A to provide a gate pulse This starts the display time multiplier see reset circuitry In addition pin 6 of U530B goes HI and is held by the feedback loop of C581 and U530A until C581 discharges The
50. and slope circuit The signal is then connected to the Gate Generator and Arm Gate Generator as in the Period mode The AND Gate goes HI and the Main Gate opens The B signal after being processed through the B attenuator gum Channel A Signal B ARM Averaging Signal Path Q275 U287B 290 B D PULSE GENERATOR UZ87A v 5 IC 0241 01660 U G0B BY PASS TIM AMPLIFIER 9240 9 From Slope Switch ARM t SWITCHING P GATE Q GENERATOR 77 eee T FREQ US35I4a amp PERIOD 4450 Q504 9519 9592 0521 2524 5 5544 amp Clock Signal amplifier etc is connected to the Gate Generator clear input This sets the Gate Generator output LO and closes the Main Gate AND TIM WIDTH A AVERAGE Refer to Fig 3 4 and Fig 3 5 for signal flow The averaging procedure for the TIM mode is different than for the period or frequency modes of operation The TIM averaging modes allow the Main Gate to open and close 10 100 or 1 000 times This is accomplished by disabling the Initiate Generator until after 10 100 or 1 000 measurements are made The input signal is connected to the Averaging Counters via the Bypass Amplifier in the TIM WIDTH A mode or to the Gate Generator in the TIM mode The output of the Averaging Counters inhibits the Initiate generator until after 10 100 or 1 000 pulses of the input signals are counted The Initiate generator in turn
51. best overall accuracy The performance of the instrument can be checked at any temperature within the 0 C to 50 C range PRELIMINARY CONTROL SETTINGS OSCILLOSCOPE Vertical Mode Left Horizontal Mode B Trigger Source Vertical Mode Other controls as desired VERTICAL PLUG IN Volts Division 5 mV AC DC GND AC Polarity UP Other controls as desired TIME BASE PLUG IN Trigger Source Internal Other controls as desired 7D15 PLUG IN SLOPE A and B in COUPL A and B AC in SOURCE INPUT A out P P SENS A and B AV Displayed Waveform Selector PSEUDO GATE GATE NORM MODE PERIODA AVERG X1 CLOCK 1 ms STORAGE ON TIME DO 2 5 ez INDEX TO CALIBRATION PROCEDURE v1 Trigger Level Range Check Page 5 5 2 Trigger Preset Check Adjust Page 5 5 3 Trigger Amplifier Compensation Check Adjust Page 5 7 v4 Attenuator Accuracy Check Page 5 7 5 input Compensation Check Adjust Page 5 8 6 Trigger Range Check Page 5 8 7 Trigger Slope Check Page 5 8 8 AC Coupling Check Page 5 9 9 External Clock Check Page 5 9 10 Phase Lock Voltage Check Adjust Page 5 9 1 11 Period A Accuracy Check Page 5 9 12 TIM Width A and TIM Accuracy Check Page 5 10 1 13 Input Trigger Sensitivity Check Page 5 11 Internal Trigger Source Check Page 5 11 V15 A and B ARM Check Page 5 12 16 Clock Check Adjust Page 5 12 Calibration 7D 15 v1 TRIGGER LEVEL RANGE CHECK
52. beyond the solder joint clip off the excess 4 Clean the flux from the solder joint with a flux removing solvent COMPONENT REPLACEMENT Disconnect the equipment from the power source before replacing components SEMICONDUCTOR REPLACEMENT Transistors and integrated circuits IC s should not be replaced unless actually defective If removed from their sockets during routine maintenance return them to their original sockets Unnecessary replacement of semiconductors may affect the calibration of this instrument When semiconductors are replaced check the performance of the part of the instrument which may be affected Replacement semiconductors should be of the original type or a direct replacement Lead configuration of the semiconductors used in this instrument are shown on the schematic diagrams If the replacement semiconductor is not of the original type check the manufacturer s basing diagram for proper basing RECALIBRATION AFTER REPAIR After any electrical component has been replaced the calibration of that particular circuit should be checked as well as the calibration of other closely related circuits The Performance Check instructions given in Section 5 provide a quick and convenient means of checking the instrument operation The Adjustment procedure in Section 5 can then be used to adjust the operation to meet the Performance Requirements listed in Section 1 Section 5 7D15 CALIBRATION INTRODUC
53. divided by counter U625 then used as the One Megahertz Standard signal for the 7D15 With S626 in the EXT position an external standard can be used A signal connected to J601 is ac coupled to the Schmitt Trigger Q606 Q614 through C603 R602 provides current limiting and C602 provides ac bypass CR603 and CR604 are over voltage protectors R613 provides positive feed back for high speed operation The output of the Schmitt Trigger is coupled through amplifier Q620 to provide the external standard CLOCK SIGNALS The 1 us 10 us 1 ms and 10 ms frequency standard are derived directly from the One Megahertz Standard CLOCK switch S699 in conjunction with the four nand gate sections of U676 selects the appropriate frequency counted down from the One Megahertz Standard by decade counters U665 U668 and U671 After selection the signal is coupled to U371A Diagram 2 and Q694 Q696 the Clock Out circuit After conditioning by the Clock Out circuit the signal is coupled to front panel CLOCK OUT connector J697 by way of connector J696 Selection of the 1 us position of the clock switch S699 presents a LO to the input of U678B and a HI to pin 8 of U676C This enables U676C and allows the One Megahertz Standard to pass directly through to the Clock Out circuit Selection of the 10 us position of S699 presents a LO to U678C and a HI to U676B This enables U676B and allows the output of decade counter U665 to pass The output of U66
54. given and the storage read and reset cycles are completed PERIOD The period of a waveform is measured by counting the number of clock pulses that occur within the period The clock is connected to the main gate U386A via U371A and U386B The period waveform is connected to U374A and U475B via U287C U290C and U287D The period pulses clocks U274B pin 15 goes LO and U386D is enabled U374A is also clocked pin 2 goes HI is inverted U386C and presented to U386D This causes the D input of U390 to go HI Aclock pulse from Q393 causes pin 3 of U390 to go LO thus enabling the main gate U386A This allows the clock to be counted With the arrival of the second pulse signifing the end of the period to be measured U374A is clocked U386D is inhibited the D ees Channel A Signal B ARM em am Averaging Signal Path Q275 U287B 0277 Y19908 U280 PULSE GENERATOR U287A u n ic Te git WIDTH A AMPLIFIER 290 From A Slope Switch ARM t SWITCHING PFREQE U351A PERIOD 450 AVERG 5594 Circuit Description 7D15 input 17390 goes LO and U386A is inhibited Also the initiate commands are given via U409A PERIOD AVERAGING Refer to Fig 3 3 for signal flow The period averaging mode uses the same procedure as the period mode except that the signal from the A Arm circuit is routed through a series of decade counters The number of averages correspond to the counters switched i
55. minimum 1 Accuracy Efreq hertz TB X Fin 1 T B 1 Efreq 100 Period Mode Range 10 nanoseconds to 10 seconds with averaging times of X1 to X1000 in decade steps Resolution 10 picoseconds maximum X 10 9 K 1 Accuracy per sec TB X Pin 9 K Eper 100 TB I Pin X M Time Interval Mode Range 6 nanoseconds to 105 seconds with averaging times of X1 to X1000 Resolution 0 1 nanosecond usable Accuracy nominal sec TB X Pi Po A M 1079 K Po 1079 K 96 100 TB in The complete expression for Time Interval averaging depends on signal to noise ratio and statistical distribution factors Refer to Figs 1 2 through 1 7 at the rear of this section for additional accuracy information 1 1 Specifications 7D15 Characteristics Frequency Ratio CH B EXT clock Range Totalize CH B Range Manual Stop Watch Range TABLE 1 1 cont Performance Requirement 10 7 to 104 109 counts Manual ON OFF control or electrical control from CH A 0 to 10 seconds NOTE Formulas given where TB dec is the time base accuracy is the period or time interval of the unknown signal whichever is applicable M is the number of averages taken is the measurement clock period T is the gate time Fip is the frequency of the unknown signal E npk is equal to the peak noise
56. select any of the available symbols For instance to display the number 3 10 five 0 6 milliamp of column current and 0 1 milliamp of row current is necessary Refer to any 7000 Series readout equipped oscilloscope service manual for detailed readout information CH 1 COLUMN AND ROW DATA Refer to Diagram 5 The 7D15 has a measurement capacity of up to 8 digits Each of the 8 digits has an associated time slot line The time slot line number 2 TS 2 corresponds to the most significant digit in the readout Time slot number 9 TS 9 corresponds to the least significant digit Time slot 1 is used to encode the overflow indication gt Time slot 10 is used to encode the location of the decimal point Since time slot 10 is the last pulse to occur it is also used for a transfer pulse DECADE COUNTERS Refer to Diagram 4 U741 isa BCD to analog converter It supplies current from time slots 1 8 9 and 10 to the column return line The magnitude of current corresponds to the BCD input Inputs at pins 1 3 and 4 are active only during time slot 9 and thus are the units input The output from the biquinary counters divide by 2 divide by 5 on Diagram 2 is connected to the biquinary to BCD converter which consists of Q703 Q705 Q709 Q711 Q713 Q715 Q717 Q719 U725A U725C and U725D The output of the biquinary to BCD converter is connected to pins 2 3 6 and 7 of U735 U735 atthe propertime will store the count and tr
57. the D input of U409A is held LO and U5364 is enabled via Q551 and U351C The intervals to be averaged are connected to the averaging counters via U536A The output of the averaging counters is U536C After the selected 10 100 or 1000 intervals are counted pin 15 of U536C goes HI presenting a HI to the D input of U409A U409A is now able to be clocked and initiate command is given To prevent U374B from inhibiting U386D during the averaging measurements it is set and held via U371B and U409A TIM The TIM mode effectively enables the main gate with a signal from the channel A input and disables the main gate with a signal from the channel B input The channel A input is connected to U374A and U374B via U287D U290C and U287C In the mode the D input of U374A is set HI The start or the channel A signal clocks U374A and U374B thus enabling U386D This presents a HI to the D input of U390 The clock is connected to the main gate U386A via U386B and U371A U390 is clocked via Q393 which in turn enables the main gate and allows the clock to be counted The stop or channel B signal is connected to the clear input of U374A via the shaper circuit U287A U371C and U290D With the arrival of the stop signal U374A is cleared U386D is disabled and a LO is presented to the D input of U390 The initiate command is also given via U536B 5 VOLT SUPPLY Refer to Diagram 7 The 5 volt switching regulator
58. to waveform number indicated in hexagon Connection soldered to circuit board Connection made to circuit board with interconnecting Blue tint encloses components located on circuit board The following prefix letters are used as reference designators to identify components or assemblies on the diagrams A Assembly separable or repairable circuit board etc LR Inductor resistor combination AT Attenuator fixed or variable M Meter B Motor Q Transistor or silicon controlled rectifier BT Battery P Connector movable portion C Capacitor fixed or variable R Resistor fixed or variable CR Diode signal or rectifier RT Thermistor DL Delay line S Switch DS Indicating device lamp 1 Transformer F Fuse TP Testpoint FL Filter U Assembly inseparable or non repairable integrated H Heat dissipating device heat sink heat radiator etc circuit etc HR Heater V Electron tube J Connector stationary portion VR Voltage regulator zener diode etc K Relay Y Crystal L Inductor fixed or variable SAVYSOVIC Z NOIL23S 7015 R89 CR20 S89 R25 C25 2 a25 9 56 CR23 ate c CR22 R26 R7 ng C13 C12 C10 C9 S95 C105 R106 R107 8 R115 0 5 S106 R125 O C125 Q125 R126 R118 CR122 C118 189 R117 CR123 C113 C112 C110 C109 R189 NOTE S11 S111 R57 S57 and S157 are located on back side of board Fig 7 1 A5 Attenuator circuit board LE EJ
59. used in the unit are not recom mended as a preventive maintenance measure See semiconductor checking information given under Troubleshooting Avoid the use of chemical cleaning agents which might damage the plastics in this instrument Avoid chemicals containing benzene toluene xylene ace tone or similar solvents CLEANING FRONT PANEL Loose dust may be removed with a soft cloth or a dry brush Water and mild detergent may be used however abrasive cleaners should not be used INTERIOR Cleaning the interior of the unit should precede calibration since the cleaning process could alter the settings of the calibration adjustments Use low velocity compressed air to blow off the accumulated dust Hardened dirt can be removed with a soft dry brush cotton tipped swab or cloth dampened with a mild detergent and water solution LUBRICATION Use a cleaning type lubricant on shaft bushings inter connecting plug contacts and switch contacts Lubricate switch detents with a heavier grease A lubrication kit containing the necessary lubricating materials and instruc tions is available through any Tektronix Field Office Order Tektronix Part No 003 0342 00 RECALIBRATION To ensure accurate measurements the 7D15 should be checked after each 1000 hours of operation or every six months if used infrequently A complete performance check procedure is given in Section 5 The performance check procedure can be helpful in
60. 0 00 TRANSISTOR SILICON NPN 04713 2N3904 9980 151 0352 00 TRANSISTOR SILICON NPN 03508 X44C282 Q982 151 0302 00 TRANSISTOR SILICON NPN 04713 2N2222A Q984 151 0220 00 TRANSISTOR SILICON PNP 80009 151 0220 00 Q986 151 0220 00 TRANSISTOR SILICON PNP 80009 151 0220 00 Q993 151 0352 00 TRANSISTOR SILICON NPN 03508 x44C282 R2 315 0180 00 RES FXD COMP 18 OHM 5 0 25W 01121 1805 R4 315 0180 00 RES FXD COMP 18 OHM 5 0 25W 01121 1805 R6 317 0102 00 RES FXD COMP 1K OHM 5 0125W 01121 1025 R7 317 0102 00 RES FXD COMP 1K OHM 5 0125W 01121 BB1025 R15 315 0100 00 RES FXD COMP 10 OHM 5 0 25W 01121 1005 R17 321 0481 00 RES FXD FILM 1M OHM 1 0 125W 75042 1004 R18 315 0274 00 RES FXD COMP 270K OHM 5 0 25W 01121 2745 R25 315 0101 00 RES FXD COMP 100 OHM 5 0 25W 01121 1015 R26 315 0302 00 RES FXD COMP 3K OHM 5 0 25W 01121 CB3025 R28 315 0752 00 RES FXD COMP 7 5K 5 0 25 01121 7525 R29 315 0102 00 RES FXD COMP 1K OHM 5 0 25W 01121 1025 R31 311 1244 00 RES VAR NONWIR 100 OHM 10 0 50W 80294 3386 107 101 R32 315 0121 00 RES FXD COMP 120 OHM 5 0 25W 01121 1215 R33 315 0430 00 RES FXD COMP 43 OHM 5 0 25W 01121 CB4305 R34 315 0101 00 RES FXD COMP 100 OHM 5 0 25W 01121 1015 R38 315 0510 00 RES FXD COMP 51 OHM 5 0 25W 01121 5105 R39 315 0181 00 RES FXD COMP 180 OHM 5 0 25W 01121 1815 R42 315 0332 00 RES FXD COMP 3 3K OHM 5 0 25W 01121 83325 R44 315 0273 00 RE
61. 0075 00 SEMICOND DEVICE GE 25V 40MA 14936 GD238 CR275 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR306 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR322 152 0075 00 SEMICOND DEVICE GE 25V 40MA 14936 GD238 CR328 152 0141 02 060000 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR353 152 0141 02 030000 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR372 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 Electrical Parts List 7D15 Tektronix Serial Model No Mfr No Part No Dscont Name amp Description Code Mfr Part Number CR445 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR448 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR459 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR467 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR472 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR483 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR516 152 0075 00 SEMICOND DEVICE GE 25V 40MA 14936 GD238 CR529 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR531 152 0075 00 SEMICOND DEVICE GE 25V 40MA 14936 GD238 CR603 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR604 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR619 152 0071 00 SEMICOND DEVICE GERMANIUM 15V 40MA 14433 G865 CR641 152 0269 00 SEMICOND DEVICE SILICON VAR VCAP 4V 33PF 25403 1N3182 CR656 152 0141 02 SEMICOND D
62. 0700 00 283 0003 00 283 0000 00 283 0023 00 283 0023 00 281 0700 00 283 0076 00 283 0000 00 283 0003 00 281 0617 00 283 0088 00 283 0003 00 283 0023 00 283 0060 00 283 0003 00 283 0095 00 283 0000 00 283 0003 00 283 0028 00 283 0060 00 283 0212 00 283 0000 00 283 0003 00 281 0524 00 283 0003 00 283 0000 00 283 0003 00 283 0076 00 283 0003 00 283 0003 00 283 0003 00 283 0003 00 283 0003 00 283 0003 00 Serial Model No Eff XB010125 Name amp Description CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER DI 0 01UF 80 20 150V DI 0 01UF 80 20 150V 0 010 80 20 150 DI 2 2PF 0 25PF 500V DI 2 2PF 0 25PF 500V DI 0 01UF 80 20 150V FXD ELCTLT 15UF 20 20V CAP FXD CER DI 15PF 10 200V CAP FXD ELCTLT 68UF 20 CAP FXD CER CAP FXD CER FXD CER CAP FXD CER DI 15PF 10 200V 0 010 80 20 150 DI 1LOPF 0 5PF 500V 0 10 20 50 CAP FXD ELCTLT 2 7UF 20 50V CAP FXD CER CAP FXD CER CAP FXD CER FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER FXD CER CAP FXD CER
63. 0K RES FXD COMP 10K RES FXD COMP 10K RES FXD COMP 10K OHM 5 0 25W OHM 5 0 25W OHM 558 0 25 OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W RES FXD COMP 10K OHM 5 0 25W RES FXD COMP 2 2K RES FXD COMP 100K RES FXD COMP 100K RES FXD COMP 100K RES FXD COMP 100K RES FXD COMP 7 5K RES FXD COMP 7 5K RES FXD COMP 7 5K OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W OHM 5 0 25W RES FXD COMP 10K OHM 5 0 25W RES FXD COMP 7 5K OHM 5 0 25W RES FXD COMP 10K OHM 5 0 25W RES FXD COMP 10K OHM 5 0 25W RES FXD COMP 10K OHM 5 0 25W RES FXD COMP 7 5K RES FXD COMP 7 5K OHM 5 0 25W OHM 5 0 25W RES FXD COMP 10K OHM 5 0 25W RES FXD COMP 7 5K RES FXD COMP 7 5K OHM 5 0 25W Electrical Parts List 7D15 Mfr Code 75042 80294 75042 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 75042 01121 75042 75042 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 0
64. 1 ow 9741 By u125c 44 7401 oily B l Gm 17 0 6 I5v bal T 5 v DIAG 18 FROM DIAG L t gt 213 R720 M 3 4K 7118 h m gt sv R74 2 Fo o8 DISPLAY 45 DISPLAY DIAG D TO U72158 C146 FIH S 470 RESET FROM PIK DIAG LR ALL VOLTAGES ARE DECOUPLED SEED FOR DETAILS SEE PARTS LIST FOR SEMICONDUCTOR TYPES FROM DIAG g SEE PARTS LIST FOR EARLIER VALUES AND SERIAL NUMBER RANGES OF PARTS MARKED WITH BLUE OUTLINE 27 16 R 741 ce CRT EXPL Es e 2 2 I 1741 155 088 600 EOLUMN 3457 SEE R743 R744 ISO lt T5 TS FROM DIAG D 4 IB lt VT 1 TS 9 8 T T ie 1 FROM DIAG 55 Gy i RTS 7 0725 V4 7401 3 M 4 4 I 6 U7IOA 21K 7406 0744 DRTE 1 eT cios PA EOE A a775 SV pies 150k 54 45v pao 3 aoa R03 RTTO ITE 5 1 7 aK 9 7906 5 DT 44 VY 7400 CR745 V Vert CR Tee RCT Res 7 Q773 45 liv L MCRTTII tiv 4 5 RTG4
65. 1 5K OHM 5 0 25W RES FXD COMP 390 OHM 5 0 25W RES FXD COMP 1K OHM 5 0 25W RES FXD COMP 9 1K OHM 5 0 25W RES FXD COMP 510 OHM 5 amp 0 25W RES FXD COMP 22K OHM 5 0 25W RES FXD COMP 10K OHM 5 0 25W RES FXD COMP 10K OHM 5 0 25W RES FXD COMP 2 2K OHM 5 0 25W RES FXD COMP 2 7K OHM 5 0 25W RES FXD COMP 390 OHM 5 0 25W RES FXD COMP 27K OHM 5 0 25W RES FXD COMP 1K OHM 5 0 25W RES FXD COMP 470K OHM 5 0 25W RES FXD COMP 7 5K OHM 5 0 25W RES FXD COMP 510 OHM 5 0 25W RES FXD COMP 7 5K OHM 5 0 25W RES FXD COMP 680 OHM 5 0 25W RES FXD COMP 16K OHM 5 0 25W Electrical Parts List 7D15 Mfr Code Mfr Part Number 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 75042 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 8215 8215 8215 1025 1025 5115 1225 CB3925 CB2025 CB2425 CB5125 CB2235 5115 CB3325 CB2025 CB2025 CB3025 CB8215 CB5615 CEATO 4021F CB8215 CB5115 CB3915 CB3625 CB1525 CB1825 CB1025 CB4715 CB1225 CB3925 CB1025 CB4725 CB4725 CB4735 CB8225 CB2235 CB1525 CB3915 CB1025 CB9125 CB5115 CB2235 CB1035 CB1035
66. 1121 01121 01121 01121 01121 01121 01121 01121 01121 01121 Mfr Part Number CEATO 1432F 3329P L58 202 CEATO 1432F CB1035 CB2035 CB1545 CB9135 CB1035 CB1035 CB2235 1035 1035 2235 2235 4735 4735 2725 2235 2225 1035 2235 2235 2225 1035 1545 CEATO 2262F CB1535 CEATO 1002F CEATO 2492F CB1545 CB4715 CB1035 081035 1035 1035 1035 1035 2225 1045 1045 1045 1045 7525 7525 7525 1035 7525 1035 1035 1035 7525 7525 1035 7525 7525 6 17 Electrical Parts List 7D15 Tektronix Serial Model No Mfr No Part No Dscont Name amp Description Code Mfr Part Number R873 315 0103 00 RES FXD COMP 10K OHM 5 0 25W 01121 1035 876 315 0752 00 RES FXD COMP 7 5K 5 0 25 01121 7525 R878 315 0103 00 RES FXD COMP 10K OHM 5 0 25W 01121 1035 R884 315 0752 00 RES FXD COMP 7 5K OHM 5 0 25W 01121 CB7525 R886 315 0752 00 I RES FXD COMP 7 5K 5 0 25 01121 7525 R888 315 0752 00 RES FXD COMP 7 5K 5 0 25 01121 7525 R890 321 0344 00 RES FXD FILM 37 4K OHM 1 0 125W 75042 CEATO 3742F R892 315 0204 00 RES FXD COMP 200K OHM 5 0 25W 01121 2045 R893 315 0204 00 RES FXD COMP 200K OHM 5 0 25W 01121 2045 R894 315 0474 00 RES FXD COMP 470K 5 0 25 01121
67. 1121 cB3325 R144 315 0273 00 RES FXD COMP 27K OHM 5 0 25W 01121 2735 R145 321 0347 00 RES FXD FILM 40 2K OHM 1 0 125W 75042 CEATO 4022F R147 321 0309 00 RES FXD FILM 16 2K OHM 1 0 125W 75042 CEATO 1622F R148 315 0684 00 RES FXD COMP 680K OHM 5 0 25W 01121 6845 R149 311 1235 00 RES VAR NONWIR 100K OHM 20 0 50W 80294 3389 31 104 R151 321 0384 00 RES FXD FILM 97 6K OHM 1 0 125W 75042 CEATO 9762F R152 321 0193 00 RES FXD FILM 1K OHM 1 0 125W 75042 CEATO 1001F R153 321 0281 00 RES FXD FILM 8 25K OHM 1 0 125W 75042 CEATO 8251F R155 315 0163 00 RES FXD COMP 16K 5 0 25 01121 1635 R157 311 0468 00 RES VAR NONWIR 100K OHM 20 0 50W 01121 GS 6588C R160 315 0821 00 RES FXD COMP 820 5 0 25 01121 8215 R162 315 0101 00 RES FXD COMP 100 OHM 5 0 25W 01121 CB1015 R163 321 0162 00 RES FXD FILM 475 OHM 1 0 125W 75042 CEATO 4750F R165 301 0821 00 RES FXD COMP 820 OHM 5 0 50W 01121 8215 lrurnished as a unit with S57 2purnished as a unit with S157 e 6 11 Electrical Parts List 7D15 6 12 Tektronix Serial Model No Mfr I Ckt No Part No Dscont Name amp Description Code Mfr Part Number 8167 315 0510 00 RES FXD COMP 51 OHM 5 0 25W 01121 5105 R169 315 0510 00 RES FXD COMP 51 OHM 5 0 25W 01121 5105 R171 315 0200 00 RES FXD COMP 20 OHM 5 0 25W 01121 2005 R173 315 0102 00 8010100 010124 RES FXD COMP lK OHM 5 0 25W 01121 1025 R173 315
68. 12 of U790D and the emitters of Q869 Q874 and Q879 also receive a high turning them all off When the ON or OFF mode switch is depressed a NORM is received at pin 13 of U790D making it high This causes pin 11 to become low and turns off Q884 This turns of Q866 Q870 Q875 and Q880 by removing their emitter current So in the FREQ mode and the NORM switch out alow appears at pins 20 of U890 and U898 This is the input for the word twelve which is displayed as EVENTS when both IC s are strobed from time slots 3 through 8 Therefore whenever the frequency mode is used the CLOCK and TIME switch have no effect on the display and only the word EVENTS will be displayed Characters may be displayed from the selections of TIME switch S599 when in the Frequency mode by depressing the NORM switch This causes a NORM low at pin 13 of U790D causing the output of U790D to go high This cancels the EVENTS display and turns on Q884 providing emitter current to transistors Q866 Q870 Q875 and Q880 The NORM also turns on Q803 which provides current for TIME switch S599 Depressing the 10 ms button on TIME switch S599 causes a high at the base of Q866 pulling its collector down This low is coupled through CR865 and on to the 5 line which causes the decimal point 5 to be displayed A low is also coupled through CR866 and CR867 placing a low at pins 13 and 3 of U890 and U898 Pin 13 is word and writes MHZ 1 Pin 3 is word nine an
69. 121 01121 01121 01121 01121 01121 01121 01121 Mfr Part Number CB2015 CB5115 CB2415 CB7515 CB3915 CB8215 CB1025 CB2715 CB1815 CB8215 CB1025 CB8215 CB1025 CB5115 CB1025 CB5125 4725 1035 1025 1035 5105 0 3915 1015 2715 CB3915 CB1015 CB1515 CB1015 CB1235 1025 4735 9115 6815 5115 6815 683025 082225 81025 85115 082235 1025 8215 8215 CB3915 CB8225 CB4735 1035 2235 915 CB3915 CB4705 1025 1025 2715 8215 Ckt No R499 R501 R503 R505 R507 R511 R513 R514 R516 R517 R523 R525 R528 R531 R534 R535 R538 R539 R541 R543 R545 R547 R549 R551 R552 R554 R571 R573 R574 R575 R577 R579 R580 R583 R585 R587 R588 R591 R593 R594 R595 R597 R602 R604 R606 R608 R609 R610 R612 R613 R615 R617 R618 R620 R624 Tektronix Part No 315 0821 00 315 0821 00 315 0821 00 315 0102 00 315 0102 00 315 0511 00 315 0122 00 315 0392 00 315 0202 00 315 0242 00 315 0512 00 315 0223 00 315 0511 00 315 0332 00 315 0202 00 315 0202 00 315 0302 00 315 0821 00 315 0561 00 321 0251 00 315 0821 00 315 0511 00 315 0391 00 315 0362 00 315 0152 00 315 0182 00 315 0102 00 315 0471 00 315 0122 00 315 0392 00 315 0102 00 315 0472 00 315 0472 00 315 0473 00 315 0822 00 315 0223 00 315 0152 00 315 0391 00 315 0102 00 315
70. 190 00 TRANSISTOR SILICON NPN 04713 2N3904 0827 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 Q829 151 0190 00 TRANSISTOR SILICON NPN 04713 2 3904 Q831 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 Q833 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 Q835 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 Q837 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 Q839 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 Q841 151 0190 00 TRANSISTOR SILICON NPN 04713 2 3904 Q843 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 0845 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 0847 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 0849 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 9851 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 0853 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 0855 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 0857 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 0859 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 0861 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 0866 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 0869 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 9870 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 0874 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 0875 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 9879 151 0190 00 TRANSISTOR SILICON NPN 04713 2 3904 Q880 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 Q884 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 9896 151 019
71. 263 07910 08806 09353 12040 12954 13715 14433 14936 18324 22229 24931 25403 28480 56289 71400 72982 74868 75042 80009 80294 81073 90201 91637 94091 98291 99942 6 2 CROSS INDEX MFR CODE NUMBER TO MANUFACTURER MANUFACTURER Allen Bradley Co Texas Instruments Inc Semiconductor Group RCA Corp Solid State Division General Electric Co Semi Conductor Products Dept Motorola Inc Semiconductor Products Div Fairchild Semiconductor A Div of Fairchild Camera and Instrument Corp Teledyne Semiconductor General Electric Co Miniature Lamp Products Dept C and K Components Inc National Semiconductor Corp Dickson Electronics Corp Fairchild Semiconductor A Div of Fairchild Camera and Instrument Corp ITT Semiconductors A Div of International Telephone and Telegraph Corp General Instrument Corp Semiconductor Products Group Signetics Corp Solitron Devices Inc Diodes Integrated Circuits and CMOS Specialty Connector Co Inc Amperex Electronic Corp Semiconductor and Microcircuits Div Hewlett Packard Co Corporate Hq Sprague Electric Co Bussman Mfg Division of McGraw Edison Co Erie Technological Products Inc Bunker Ramo Corp The Amphenol RF Div TRW Electronic Components IRC Fixed Resistors Philadelphia Division Tektronix Inc Bourns Inc Instrument Div Grayhill Inc Mallory Capacitor Co Div of P R Mallory Co Inc Dale
72. 3 5 07910 1N4372A VR167 152 0279 00 SEMICOND DEVICE ZENER 0 4W 5 1V 5 07910 1 751 VR169 152 0514 00 SEMICOND DEVICE ZENER 0O 4W 10V 99942 R4763 VR259 152 0280 00 SEMICOND DEVICE ZENER 0 4W 6 2V 5 04713 1N753A VR419 152 0395 00 SEMICOND DEVICE ZENER 0 4W 4 3V 5 07910 1N749A VR493 152 0395 00 SEMICOND DEVICE ZENER 0 4W 4 3V 5 07910 1N749A VR771 152 0168 00 SEMICOND DEVICE ZENER 0 4W 12V 58 04713 1N963B VR791 152 0168 00 SEMICOND DEVICE ZENER 0 4W 12V 5 04713 1N963B VR995 152 0309 00 SEMICOND DEVICE ZENER 1W 6 2V 5 04713 1N3828A Y622 119 0262 00 OSCILLATOR RF XTAL CONTROLLED 5 MHZ ADJ 80009 119 0262 00 6 20 Section 7 7D15 SECTION 7 DIAGRAMS AND CIRCUIT BOARD ILLUSTRATIONS Symbols and Reference Designators Electrical components shown on the diagrams are in the following units unless noted otherwise Capacitors Values one or greater are in picofarads pF Values less than one are in microfarads uF Resistors Ohms 2 Symbols used on the diagrams are based on USA Standard Y 32 2 1967 Logic symbology is based on MIL STD 806B in terms of positive logic Logic symbols depict the logic function performed and may differ from the manufacturer s data The following special symbols are used on the diagrams External Screwdriver adjustment OoOO External control or connector Clockwise control rotation in direction of arrow Refer to diagram number indicated in diamond 7 Refer
73. 3 00 315 0222 00 315 0103 00 315 0223 00 315 0223 00 315 0222 00 315 0103 00 315 0154 00 321 0323 00 315 0153 00 321 0289 00 321 0327 00 315 0154 00 315 0471 00 315 0103 00 315 0103 00 315 0103 00 315 0103 00 315 0103 00 315 0103 00 315 0222 00 315 0104 00 315 0104 00 315 0104 00 315 0104 00 315 0752 00 315 0752 00 315 0752 00 315 0103 00 315 0752 00 315 0103 00 315 0103 00 315 0103 00 315 0752 00 315 0752 00 315 0103 00 315 0752 00 315 0752 00 Serial Model No Eff 020000 49999 050000 amp Description RES FXD FILM 14 3K OHM l1 0 125W RES VAR NONWIR 2K OHM 10 0 50W RES FXD FILM 14 3K OHM 1 0 125W RES EXD COMP LOK RES FXD COMP 20K RES FXD COMP 150K OHM 5 0 25W RES FXD COMP 91K RES FXD COMP 10K RES FXD COMP 10K RES FXD COMP 22K RES FXD COMP 10K RES FXD COMP 10K RES FXD COMP 22K RES FXD COMP 22K RES FXD COMP 47K RES FXD COMP 47K RES FXD COMP 2 7K OHM 5 0 25W RES FXD COMP 22K RES FXD COMP 2 2K OHM 5 0 25W RES FXD COMP 10K RES FXD COMP 22K RES FXD COMP 22K RES FXD COMP 2 2 OHM 5 0 25W RES FXD COMP LOK RES FXD COMP 150K OHM 5 0 25W RES FXD FILM 22 6K OHM 1 0 125W RES FXD COMP 15K RES FXD FILM 10K OHM 1 0 125W RES FXD FILM 24 9K OHM 1 0 125W RES FXD COMP 150K OHM 5 0 25W RES FXD COMP 470 RES FXD COMP 10K RES FXD COMP 1
74. 34 Ckt No Al A2 A3 4 5 6 6 7 C34 C43 51 65 69 C74 C81 C102 C105 C109 cilo C109 C110 C113 E C113 C118 C125 C127 C133 C134 C136 C138 C140 C143 C151 Tektronix Part No 670 2169 00 670 2171 00 670 2172 00 670 2170 00 670 2168 00 670 2165 00 670 2165 01 670 2167 00 670 2166 00 283 0076 00 283 0076 00 283 0187 00 307 1014 00 307 1014 01 307 1013 00 307 1013 01 283 0000 00 283 0000 00 290 0136 00 283 0076 00 281 0662 00 283 0003 00 281 0542 00 290 0177 00 283 0060 00 283 0003 00 283 0003 00 283 0003 00 281 0604 00 281 0604 00 283 0076 00 283 0187 00 307 1014 00 307 1014 01 307 1013 00 307 1013 01 283 0000 00 283 0000 00 290 0136 00 283 0076 00 281 0662 00 283 0003 00 281 0542 00 290 0177 00 283 0060 00 283 0003 00 Serial Model No Eff 010100 060000 010100 030000 010100 030000 010100 030000 010100 030000 Dscont 059999 029999 029999 029999 029999 Name amp Description BOARD 55 BOARD ASSY MODE BOARD ASSY AVERAGE BOARD ASSY CLOCK BOARD ASSY ATTENUATOR BOARD ASSY INTERFACE CKT BOARD ASSY INTERFACE CKT BOARD ASSY TIME BASE AND LOGIC CKT BOARD ASSY POWER SUPPLY CAP FXD CER DI 27PF 10 500V CAP FXD CER DI 27PF 10 500V CAP FXD CER 1 0 0470 10
75. 3571 80009 151 0367 00 0701 151 0220 00 _ TRANSISTOR SILICON PNP 80009 151 0220 00 0703 151 0225 00 TRANSISTOR SILICON NPN 07910 523365 0705 151 0225 00 TRANSISTOR SILICON NPN 07910 523365 0709 151 0302 00 TRANSISTOR SILICON NPN 04713 2N2222A Q711 151 0302 00 TRANSISTOR SILICON NPN 04713 2N2222A Q713 151 0302 00 TRANSISTOR SILICON NPN 04713 2 2222 Q715 151 0302 00 TRANSISTOR SILICON NPN 04713 2N2222A Q717 151 0302 00 TRANSISTOR SILICON NPN 04713 2N2222A Q719 151 0302 00 TRANSISTOR SILICON NPN 04713 2N2222A Q748 151 0190 00 TRANSISTOR SILICON NPN 04713 2 3904 Q773 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 9775 151 0192 00 020000 TRANSISTOR SILICON NPN SEL FROM MPS6521 80009 151 0192 00 Q778 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 0782 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 0788 151 0190 00 TRANSISTOR SILICON 04713 2N3904 Q794 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 9803 151 0301 00 TRANSISTOR SILICON PNP 04713 2N2907A 0815 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 0817 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 0819 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 Electrical Parts List 7D15 6 9 Electrical Parts List 7D15 Tektronix Serial Model No Mfr Ckt Part No Eff Dscont Name amp Description Code Mfr Part Number 0821 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 0823 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 0825 151 0
76. 400 ATTENUATOR FXD LOOX ATTENUATOR FXD 100X ATTENUATOR F XD 10X ATTENUATOR FXD 10X CAP FXD CER DI 0 001UF 100 0 500V CAP FXD CER DI 0 001UF 100 0 500 CAP FXD ELCTLT 2 2UF 20 20V FXD CER DI 27PF 10 500V CAP FXD CER DI 10PF 0 5PF 500V CAP FXD CER DI 0 01UF 80 20 150V CAP FXD CER DI 18PF 10 500V CAP FXD ELCTLT 1UF 20 50V CAP FXD CER DI 100PF 55 200V FXD CER DI 0 01UF 80 20 150V CAP FXD CER DI 0 01UF 80 20 150V CAP FXD CER DI 0 01UF 80 20 150V FXD CER DI 2 2PF 0 25PF 500V CAP FXD CER DI 2 2PF 0 25PF 500V CAP FXD CER DI 27PF 10 500V CAP FXD CER DI 0 047UF 10 400V _ ATTENUATOR FXD 100X ATTENUATOR FXD 100xX ATTENUATOR F XD 10X ATTENUATOR FXD 10X CAP FXD CER DI 0 001UF 100 0 500V FXD CER DI 0 001UF 100 0 500V CAP FXD ELCTLT 2 2UF 20 20V CAP FXD CER DI 27PF 10 500V CAP FXD CER DI 10PF t 0 5PF 500V CAP FXD CER DI 0 01UF 80 20 150V CAP FXD CER DI 18PF 10 500V CAP FXD ELCTLT 1UF 20 50V CAP FXD CER DI 100PF 5 200V CAP FXD CER DI 0 01UF 80 20 150V Electrical Parts List 7D15 Mfr Code 80009 80009 80009 80009 80009 80009 80009 80009 80009 56289 56289 72982 80009 80009 80009 80009 72982 72982 56289 56289 72982 72982 72982 90201 72982 72982 72982 72982 72982 72982 56289 72982 80009 80009 80009 80009
77. 43 4300 352 0324 00 386 1447 65 OBD 4352 1 0318 OBD 8 3 Mechanical Parts List 7D15 Fig amp Index No 1 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 8 4 Tektronix Serial Model No Part No a w ums dum mim min 131 0589 00 337 1433 00 343 0089 00 006 0531 00 136 0252 04 136 0263 03 136 0328 02 214 0579 00 344 0154 00 211 0155 00 361 0301 00 211 0097 00 210 1133 00 129 0317 00 131 0608 00 136 0252 04 136 0263 03 136 0254 01 214 0579 00 260 0723 00 337 0607 00 211 0155 00 361 0238 00 211 0116 00 407 1048 00 131 1030 00 131 1031 00 210 0779 00 136 0252 00 136 0252 04 260 1227 01 260 1132 00 220 0455 00 211 0116 00 200 1390 00 211 0008 00 210 0004 00 Eff Dscont Qty P I N 13 344 Pour FN Ww FIGURE 1 EXPLODED CONT 12345 Name amp Description CKT BOARD ASSY INCLUDES CONTACT ELEC 0 365 INCH LONG CKT BOARD ASSY AVERAGE SEE A3 EPL ATTACHING PARTS SCREW MACHINE 1 72 X 0 25 82 DEG FLH STL m o n om CKT BOARD ASSY INCLUDES CONTACT ELEC 0 46 INCH LONG CKT BOARD ASSY CLOCK SEE A4 EPL ATTACHING PARTS SCREW MACHINE 1 72 X 0 25 82 DEG FLH STL CKT BOARD ASSY INCLUDES
78. 47 00 354 0391 00 214 1139 00 214 1139 02 214 1139 03 214 1127 00 401 0081 01 105 0352 00 401 0146 00 211 0116 00 210 0406 00 337 1647 00 213 0254 00 376 0051 00 213 0022 00 354 0251 00 376 0049 00 384 1140 00 211 0105 00 220 0547 01 211 0116 00 131 0590 00 131 0589 00 131 0608 00 131 0592 00 131 1003 00 136 0252 04 214 0579 00 ee aum me We mmn oo 210 0583 00 210 0046 00 386 2273 00 352 0238 00 351 0188 00 351 0185 00 386 1402 00 213 0192 00 361 0326 00 214 1140 00 214 1061 00 426 0499 01 426 0505 04 131 0707 00 210 0774 00 Dscont Qty d N N F E00 N N 1 BPumbub5blilrbp HP Ui NU gt b Ui H HP Uu Mechanical Parts List 7D15 FIGURE 1 EXPLODED CONT 123465 amp Description RESISTOR VAR ATTACHING PARTS FOR EACH SCREW MACHINE 2 56 X 0 188 INCH PNH STL WASHER LOCK INTL O 092 ID X 0 18 0D STL NUT PLAIN HEX 0 25 32 X 0 312 INCH BRS WASHER LOCK INTL 0 26 ID X 0 40 OD STL PLATE VAR RES M 1 136 X 0 875 INCH OA aw m CPLG SHAFT RDG FOR 0 08 0 125 DIA SHAFT COUPLING INCLUDES SETSCREW 4 40 X 0 094 INCH HEX SOC STL EXTENSION SHAFT 4 375 INCH LONG RING RETAINING 0 395 FREE ID X 0 025 STL SPRING FLAT GOLD COLORED SPRING FLAT GREEN COLORED SPRING FLAT RED COLORED ROLLER DETENT 0 125 DIA X 0 125 INCH L BEARING CAM SW WITH THREADED IN
79. 5 0101 00 RES FXD COMP 100 OHM 5 0 25W 01121 1015 R333 315 0511 00 RES FXD COMP 510 OHM 5 0 25W 01121 5115 R336 315 0101 00 RES FXD COMP 100 OHM 5 0 25W 01121 1015 R338 315 0301 00 RES FXD COMP 300 OHM 5 0 25W 01121 3015 R339 315 0750 00 RES FXD COMP 75 5 0 25 01121 7505 R340 315 0241 00 RES FXD COMP 240 OHM 5 0 25W 01121 CB2415 R342 315 0620 00 RES FXD COMP 62 5 0 25 01121 6205 8343 315 0620 00 RES FXD COMP 62 OHM 5 0 25W 01121 CB6205 R344 315 0471 00 RES FXD COMP 470 5 0 25 01121 4715 R346 315 0121 00 RES FXD COMP 120 OHM 5 0 25W 01121 1215 R347 315 0471 00 RES FXD COMP 470 OHM 5 0 25W 01121 4715 R348 315 0151 00 RES FXD COMP 150 OHM 5 0 25W 01121 1515 R349 315 0151 00 RES FXD COMP 150 OHM 5 0 25W 01121 1515 R351 315 0103 00 RES FXD COMP 10K OHM 5 0 25W 01121 1035 R353 315 0102 00 010100 29999 RES FXD COMP 1K OHM 5 0 25W 01121 1025 R353 315 0182 00 030000 RES FXD COMP 1 8K OHM 5 0 25W 01121 1825 R355 315 0362 00 RES FXD COMP 3 6K OHM 5 0 25W 01121 CB3625 R357 315 0102 00 RES FXD COMP 1K 5 0 25 01121 1025 R358 315 0222 00 RES FXD COMP 2 2K OHM 5 0 25W 01121 CB2225 R359 315 0302 00 RES FXD COMP 3K OHM 5 0 25W 01121 3025 R361 315 0511 00 _ RES FXD COMP 510 OHM 5 0 25W 01121 5115 R363 315 0391 00 RES FXD COMP 390 OHM 5 0 25W 01121 3915 R365 315 0103 00 RES FXD COMP 10K OHM 5
80. 5 is the One Megahertz Standard divided by 10 Selection of the 1 ms position of S699 presents a LO to U678D and a HI to U676A This enables U676A andallows the output of decade counter U671 to pass The output of U671 is the One Megahertz Standard divided by 1000 The 10 ms frequency standard is derived by dividing the One Megahertz Standard by 10 000 in U665 U668 U671 and U674 Thereset command connected to pin 1 of U674 ensures that the 10 ms frequency standard will be ready The 10 ns and 100 ns clocks are derived from the 100 megahertz oscillator U643 Selection of the 10 ns position of S699 presents a low to Q687 This turns Q687 on and allows Q689 to turn on Q689 then passes the 100 megahertz output of U643 to the Clock Out circuit Selection of the 100 ns position of 9699 causes the output of U678A to low This enables U676D and allows the 10 megahertz output of Q660 to pass The 10 megahertz output of Q660 is derived from the 100 megahertz oscillator U643 U647A U647B U654A and U654B compose a high speed decade counter Q655 and Q660 is a buffer used to match the MECL of Q647B to the TTL input of U662 100 MHz OSCILLATOR U643 is a voltage controlled oscillator and is connected in a phase lock loop with the One Megahertz Standard The output of U643 is divided by 100 by decade counters U647A U647B U654A and U654B and by decade counter U662 The output of U662 is approximately one megahertz This one mega
81. 7 670 2169 00 SWITCH PUSH GATE 80009 670 2169 00 2568 300 260 1206 00 SWITCH TOGGLE SPDT 5A L15VACCENTER OFF 09353 7103SYZ 5471 260 0735 00 SWITCH PUSH SPST 81073 39 1 55849 55997 670 2172 00 SWITCH PUSH AVERAGE 80009 670 2172 00 5626 260 0723 00 SWITCH SLIDE DPDT 0 5A 125VAC 80009 260 0723 00 5699 670 2170 00 SWITCH PUSH CLOCK 80009 670 2170 00 T75 120 0444 00 XFMR TOROID 5 TURNS BIFILAR 80009 120 0444 00 T175 120 0444 00 XFMR TOROID 5 TURNS BIFILAR 80009 120 0444 00 T287 120 0459 00 XFMR TOROID 10 TURNS BIFILAR 80009 120 0459 00 T320 120 0444 00 XFMR TOROID 5 TURNS BIFILAR 80009 120 0444 00 T342 120 0444 00 XFMR TOROID 5 TURNS BIFILAR 80009 120 0444 00 T395 20 0459 00 XFMR TOROID 10 TURNS BIFILAR 80009 120 0459 00 T994 120 0784 00 TRANSFORMER PLS POT CORE SW REGULATOR 80009 120 0784 00 U43 156 0223 00 MICROCIRCUIT LI OPERATIONAL AMPLIFIER 12040 LM308H U143 156 0223 00 MICROCIRCUIT LI OPERATIONAL AMPLIFIER 12040 LM308H lrurnished as a unit with S89 6Furnished as a unit with S106 Furnished as unit with R57 7See Mechanical Parts List for replacement parts Furnished as a unit with S6 8rurnished as a unit with R256 and S584 Furnished as a unit with S189 9rurnished as a unit with R256 and S256 a Furnished as a unit with R157 6 18 No U244 U264 U266 U268 0280 0287 0290 0295 0351 0351 0360 0371 0374 0386 0390 0401 0409 0413 0421 0450 0463 0478 0489 0496 049
82. 72982 72982 72982 56289 72982 56289 72982 72982 72982 72982 72982 56289 72982 72982 72982 72982 72982 72982 72982 72982 56289 72982 72982 72982 72982 72982 72982 Mfr Part Number 855 547 1032 855 547 1032 855 547 1032 301 000 020229 301 000C0J0229C 855 547 1032 TDC156M020FL 374 001COGOl150K TDC686MOO6FL 374 001 0 0150 855 547 1032 301 000H3M0100D 8131N075651104M 196D275X0050JA1 855 547E1032 855 547 1032 831 516 102 200374 40C287A2 831 516E102P 855 547 1032 374 00153 0339 855 547 1032 831 516 102 200374 2065374 374 00153 0339 40C287A2 831 516 102 855 547E103Z 374 001C0G0150K 2065285 855 547 1032 20C374 855 535U2J101J 855 547 1032 855 535A560K 831 516E102P 855 547 1032 19 606 855 535U2J101J 8141050651205M 831 516E102P 855 547 1032 301 000 500151 855 547 1032 831 516 102 855 547 1032 40C287A2 855 547 1032 855 547 1032 855 547 1032 855 547 1032 855 547 1032 855 547 1032 Electrical Parts List 7D15 Tektronix Serial Model No Mfr Ckt No Part No Dscont Name amp Description Code Mfr Part Number C746 281 0525 00 CAP FXD CER 470 94 500 72982 301 000 500471 750 283 0076 00 CAP FXD CER DI 27PF 10 500V 56289 40C287A2 C753 283 0076 00 CAP FXD CER DI 27PF 10 500V 56289 40C287A2 C755 283 0000 00 CAP FXD CER DI 0 001UF 4100 0 500V 72982 831 516 102 C757 283 0000 00 CAP
83. 8 315 0200 00 RES FXD COMP 20 OHM 5 0 25W 01121 2005 R80 315 0102 00 RES FXD COMP 1K OHM 5 0 25W 01121 1025 R82 315 0162 00 RES FXD COMP 1 6K 5 0 25 01121 1625 R83 315 0111 00 RES FXD COMP 110 OHM 5 0 25W 01121 1115 R87 315 0563 00 RES FXD COMP 56K OHM 5 0 25W 01121 CB5635 R89 315 0153 00 RES FXD COMP 15K OHM 5 0 25W 01121 1535 R102 315 0180 00 RES FXD COMP 18 OHM 5 0 25W 01121 1805 R106 317 0102 00 RES FXD COMP 1K OHM 5 0125W 01121 25 R107 317 0102 00 RES FXD COMP 1K OHM 5 0125W 01121 BB1025 R115 315 0100 00 RES FXD COMP 10 OHM 5 0 25W 01121 681005 R117 321 0481 00 RES PXD FILM 1M OHM 1 0 125W 75042 CEATO 1004F R118 315 0274 00 RES FXD COMP 270K OHM 5 0 25W 01121 2745 R125 315 0101 00 RES FXD COMP 100 OHM 5 0 25W 01121 1015 R126 315 0302 00 RES FXD COMP 3K OHM 5 0 25W 01121 3025 R128 315 0752 00 RES FXD COMP 7 5K OHM 5 0 25W 01121 7525 R129 315 0102 00 RES FXD COMP 1K OHM 5 0 25W 01121 1025 R131 311 1244 00 RES VAR NONWIR 100 OHM 10 0 50W 80294 3386 07 101 R132 315 0121 00 RES FXD COMP 120 OHM 5 0 25W 01121 1215 R133 315 0430 00 RES FXD COMP 43 OHM 5 0 25W 01121 4305 R134 315 0101 00 RES FXD COMP 100 OHM 5 0 25W 01121 1015 R138 315 0510 00 RES FXD COMP 51 OHM 5 0 25W 01121 5105 R139 315 0181 00 RES FXD COMP 180 5 0 25 01121 1815 R142 315 0332 00 RES FXD COMP 3 3K OHM 5 0 25W 0
84. 9 0519 0521 0530 0536 0625 0628 0643 0647 0654 0662 0665 0668 0671 0674 0676 0678 0725 0728 0732 0735 0741 0758 07621 0790 0890 0898 VR36 VR67 VR69 Tektronix Part No 156 0030 00 156 0113 00 156 0057 00 156 0043 00 156 0228 00 156 0226 00 156 0227 00 156 0226 00 156 0047 00 156 0144 00 156 0226 00 156 0205 00 156 0230 00 156 0226 00 156 0228 00 156 0228 00 156 0230 00 156 0230 00 156 0047 00 156 0228 00 156 0225 00 156 0030 00 156 0144 00 156 0230 00 156 0230 00 156 0079 00 156 0079 00 156 0180 00 156 0252 00 156 0091 00 156 0124 00 156 0266 00 156 0230 00 156 0230 00 156 0079 00 156 0079 00 156 0091 00 156 0091 00 156 0091 00 156 0057 00 156 0058 00 156 0057 00 156 0097 00 156 0040 00 156 0040 00 155 0088 00 155 0090 00 155 0090 00 156 0030 00 155 0087 00 155 0086 00 152 0278 00 152 0279 00 152 0514 00 Serial Model No Eff Dscont 010100 29999 3 1155 0090 01 may be used Electrical Parts List 7D15 Name amp Description MICROCIRCUIT DI QUAD 2 INPUT POS NAND GATE MICROCIRCUIT DI QUAD 2 INPUT POS NAND GATE MICROCIRCUIT DI QUAD 2 INPUT NAND GATE MICROCIRCUIT DI 2 INPUT NOR GATE MICROCIRCUIT DI MASTER SLAVE TYPE D F F MICROCIRCUIT DI QUAD 2 INPUT NOR GATE MICROCIRCUIT DI QUAD 2 INPUT OR GATE MICROCIRCUIT DI QUAD 2 INPUT NOR GATE MICROCIRCUIT DI 3 INPUT NAND GATE MICROCIRCUIT DI 3 INPUT POS NAND GATE M
85. 9 CJ CJ L4 NOTES FOR 611 S111 j CLOSURE DOT B CONTACT CLOSED A CONTACT OPEN 4 CONTACTS ARE ON SIDE BOARD SWITCH SHOWN IN _ ATES 22 v PRESET CLOSED wHEM 97 LEVEL POT 15 FULLY Cw 11 CA TRIG SENSITIVITY 45v 7 R15 EOUPL cas cia 4 8 27 i i ERLI Q25 lt cH Jl 041 i aS HN 23 2 ve ae l RIS Ss d nac INPUT R2 V CRIT aK S V CRIS RAS CH A P35 SLOPE F 389 B 15 This wire E CTS X TL CHB Jisa may be m C T 5 RIS Ne s in Un I 4 x BIST CLOSED WHEN LEVEL POT 1 FULLY 6144 21K pas ciot lov cH n B INPUT kloa AS ATTENUATOR BOARD 154 he 154 RIOG 5 IK 50i S100 cus E 125 V AEN ASA taa RIIB M CRITA ak S CRIT 7015 B TRIG SENSITIVITY lt am E 1 1 5 R44 R53 RA 8 25k e BO K 43 2 iv lt R55 RSI lek S57 4 11 4 ALL VOLTAGES INTERFACE ARE DECOUPLED SEE FOR DETAILS SEE PARTS LIST
86. CAP FXD CER CAP FXD CER CAP FXD CER FXD CER CAP FXD CER CAP FXD CER CAP FXD CER FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER FXD CER CAP FXD CER FXD CER DI 0 01UF 80 20 150V DI 0 01UF 80 20 150V DI 0 001UF 100 0 500V 0 10 80 20 10 27 10 500 0 0010 100 0 500 DI 0 01UF 80 20 150V DI 3 3PF 10 200V DI 0 01UF 80 20 150V DI 0 001UF 100 0 500V DI 0 1UF 80 20 10V DI 0 1UF 80 20 10V DI 3 3PF 10 200V DI 27PF 10 500V DI 0 001UF 100 0 500V DI 0 01UF 80 20 L50V DI 15PF 10 200V DI 1000PF 5 amp 500V DI 0 01UF 80 20 150V DI 0 1UF 80 20 10V 1 100 5 200 DI 0 01UF 80 20 150V DI 56PF 10 200V 0 0010 100 0 500 0 010 80 20 150 0 00220 20 50 100 5 200 20 20 50 DI 0 001UF 100 0 500V 0 010 80 20 150 DI 150PF 30PF 500V DI 0 01UF 480 20 150V DI 0 001UF 100 0 500V DI 0 01UF 80 20 150V DI 27PF 10 500V 0 010 80 20 150 0 010 80 20 150 0 010 80 20 150 0 010 80 20 150 DI 0 01UF 80 20 150V 0 010 80 20 150 Mfr Code 72982 72982 72982 72982 72982 72982 90201 72982 90201 72982 72982 72982 72982 56289 72982 72982 72982 56289 56289 72982 72982 72982 72982 72982 56289 56289 72982 56289
87. CB2225 CB2725 CB3915 CB2735 CB1025 CB4745 CB7525 CB5115 CB7525 6815 1635 6 15 Electrical Parts List 7D15 Tektronix Serial Model No Mfr Ckt No Part No Eff Dscont Name amp Description Code Mfr Part Number R629 315 0103 00 RES FXD COMP 10K OHM 5 0 25W 01121 1035 R631 315 0103 00 RES FXD COMP 10K OHM 5 0 25W 01121 1035 632 315 0243 00 RES FXD COMP 24K OHM 5 0 25W 01121 2435 R636 315 0102 00 RES FXD COMP 1K OHM 5 0 25W 01121 1025 R637 315 0133 00 RES FXD COMP 13K OHM 5 0 25W 01121 CB1335 R640 315 0510 00 RES FXD COMP 51 OHM 5 0 25W 01121 5105 R644 315 0622 00 RES FXD COMP 6 2K OHM 5 0 25W 01121 6225 R645 315 0471 00 RES FXD COMP 470 OHM 5 0 25W 01121 4715 R647 315 0821 00 RES FXD COMP 820 OHM 5 0 25W 01121 8215 R649 315 0821 00 RES FXD COMP 820 OHM 5 0 25W 01121 8215 R651 315 0821 00 RES FXD COMP 820 OHM 5 0 25W 01121 8215 R653 315 0821 00 RES FXD COMP 820 OHM 5 0 25W 01121 8215 R655 315 0201 00 RES FXD COMP 200 OHM 5 0 25W 01121 2015 R656 315 0202 00 RES FXD COMP 2K OHM 5 0 25W 01121 2025 R658 315 0391 00 RES FXD COMP 390 OHM 5 0 25W 01121 CB3915 R660 315 0102 00 RES FXD COMP 1K 5 0 25 01121 1025 R667 315 0752 00 RES FXD COMP 7 5K OHM 5 0 25W 01121 7525 R677 315 0223 00 RES FXD COMP 22K OHM 5 0 25W 01121 CB2235 R679 315 0223 00 RES FXD COMP 22K OHM 5 0 25W 01121 2235 R681 315 0223 00 RES FXD
88. D GENERAL The test equipment and accessories or its equivalent required for complete calibration of the 7D15 are listed in Table 5 1 Specifications given for the test equipment are the minimum necessary for accurate calibration Therefore the specifications of any test equipment used must meet or exceed the listed specifications All test equipment is assumed to be correctly calibrated and operating within the listed specifications Detailed operating instructions for the test equipment are not given in this procedure Refer to the instruction manual for the test equipment if more information is needed SPECIAL CALIBRATION FIXTURES Special Tektronix calibration fixtures are used in this procedure only where they facilitate instrument calibra tion These special calibration fixtures are available from Tektronix Inc Order by part number through your local Tektronix Field Office or representative CALIBRATION EQUIPMENT ALTERNATIVES All of the listed test equipment is required to completely check and adjust this instrument calibration procedure is based on the first item of equipment given as an example of applicable equipment When other equip ment is substituted control settings or the calibration setup may need to be altered slightly to meet the requirements of the substitute equipment If the exact item of test equipment given as an example in the Test Equipment list is not available first check the Specifications col
89. D COMP 390 OHM 5 0 25W RES FXD COMP 100 5 0 25 RES FXD COMP 270 OHM 5 0 25W RES FXD COMP 390 OHM 5 0 25W RES FXD COMP 100 OHM 5 0 25W RES FXD COMP 150 OHM 5 0 25W RES FXD COMP 100 OHM 5 0 25W RES FXD COMP 12K OHM 5 0 25W RES FXD COMP 1K OHM 5 0 25W RES FXD COMP 47K OHM 5 0 25W RES FXD COMP 910 OHM 5 0 25W RES FXD COMP 680 OHM 5 0 25W RES FXD COMP 510 OHM 5 0 25W RES FXD COMP 680 OHM 5 0 25W RES FXD COMP 3K OHM 5 0 25W RES FXD COMP 2 2K OHM 5 0 25W RES FXD COMP 1K OHM 5 0 25W RES FXD COMP 510 OHM 5 0 25W RES FXD COMP 22K OHM 5 0 25W RES FXD COMP 1K OHM 5 0 25W RES FXD COMP 820 OHM 5 0 25W RES FXD COMP 820 OHM 5 0 25W RES FXD COMP 390 OHM 5 0 25W RES FXD COMP 8 2K OHM 5 0 25W RES FXD COMP 47K OHM 5 0 25W RES FXD COMP 10K OHM 5 0 25W RES FXD COMP 22K OHM 5 0 25W RES FXD COMP 390 5 0 25 RES FXD COMP 390 OHM 5 0 25W RES FXD COMP 47 OHM 5 0 25W RES FXD COMP 1K OHM 5 0 25W RES FXD COMP 1K 5 0 25 RES FXD COMP 270 OHM 5 0 25W RES FXD COMP 820 OHM 5 0 25W Mfr Code 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01
90. D FIXED CAB CABINET GSKT GASKET CAP CAPACITOR HDL HANDLE CER CERAMIC HEX HEXAGON CHAS CHASSIS HEX HD HEXAGONAL HEAD CKT CIRCUIT HEX SOC HEXAGONAL SOCKET COMP COMPOSITION HLCPS HELICAL COMPRESSION CONN CONNECTOR HELICAL EXTENSION COV COVER HV HIGH VOLTAGE CPLG COUPLING IC INTEGRATED CIRCUIT CRT CATHODE RAY TUBE ID INSIDE DIAMETER DEG DEGREE IDENT IDENTIFICATION DWR DRAWER IMPLR IMPELLER IN INCH SE SINGLE END INCAND INCANDESCENT SECT SECTION INSUL INSULATOR SEMICOND SEMICONDUCTOR INTL INTERNAL SHLD SHIELD LPHLOR LAMPHOLDER SHLDR SHOULDERED MACH MACHINE SKT SOCKET MECH MECHANICAL SL SLIDE MTG MOUNTING SLFLKG SELF LOCKING NIP NIPPLE SLVG SLEEVING NON WIRE NOT WIRE WOUND SPR SPRING OBD ORDER BY DESCRIPTION SQ SQUARE OD OUTSIDE DIAMETER SST STAINLESS STEEL OVH OVAL HEAD STL STEEL PH BRZ PHOSPHOR BRONZE 5 SWITCH PL PLAIN or PLATE T TUBE PLSTC PLASTIC TERM TERMINAL PN PART NUMBER THD THREAD PNH PAN HEAD THK THICK PWR POWER TNSN TENSION RCPT RECEPTACLE TPG TAPPING RES RESISTOR TRH TRUSS HEAD RGD RIGID V VOLTAGE RLF RELIEF VAR VARIABLE RTNR RETAINER W WITH SCH SOCKET HEAD WSHR WASHER SCOPE OSCILLOSCOPE XFMR TRANSFORMER TRANSISTOR SCR SCREW XSTR Mechanical Parts 1151 7015 MFR CODE 00779 08261 09353 13257 22526 23499 24618 24931 42838 45722 70276 71279 73743 74445 74868 77250 78189 79807 80009 81073 83385 83501 86445 87308 97464 98291 8 2
91. D SEE GAV cae See PARTIAL A4 CLOCK SWITCH BOARD SEE SEE PARTS LIST FOR SEMICONDUCTOR TYPES AB POWER SUPPLY BOARD POWER DISTRIBUTION 6 MAINFRAME CONNECTOR m NOILn8IHISIO H3MOd lt gt SHOLO3NNOO 3IWVHd3NIVIN Section 8 7D15 REPLACEABLE MECHANICAL PARTS PARTS ORDERING INFORMATION Replacement parts are available from or through your local Tektronix Inc Field Office or representative Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest circuit improvements developed in our engineering department It is therefore important when ordering parts to include the following information in your order Part number instrument type or number serial number and modification number if applicable If a part you have ordered has been replaced with a new or improved part your local Tektronix Inc Field Office or representative will contact you concerning any change in part number Change information if any is located at the rear of this manual SPECIAL NOTES AND SYMBOLS X000 Part first added at this serial number 00 Part removed after this serial number FIGURE AND INDEX NUMBERS Items in this section are referenced by figure and index numbers to the illustrations INDENTATION SYSTEM This mechanical parts list is indented to indi
92. EL FROM 3571TP 01295 5 6814 0445 151 0220 00 TRANSISTOR SILICON PNP 80009 151 0220 00 0447 151 0220 00 TRANSISTOR SILICON PNP 80009 151 0220 00 0459 151 0188 00 TRANSISTOR SILICON PNP 04713 2N3906 Q467 151 0188 00 TRANSISTOR SILICON PNP 04713 2N3906 Q475 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 9490 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 Q509 151 0225 00 TRANSISTOR SILICON NPN 07910 523365 Q512 151 0225 00 TRANSISTOR SILICON NPN 07910 CS23365 Q529 151 0188 00 TRANSISTOR SILICON PNP 04713 2N3906 Q551 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 Q571 151 0282 00 TRANSISTOR SILICON NPN 02735 2N5179 Q574 151 0225 00 TRANSISTOR SILICON NPN 07910 523365 Q584 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 Q592 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 0606 151 0192 00 TRANSISTOR SILICON NPN SEL FROM MPS6521 80009 151 0192 00 0614 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 0620 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 Q633A B 151 1054 00 TRANSISTOR SILICON JFE N CHANNEL DUAL 22229 FD1644 0655 151 0220 00 TRANSISTOR SILICON PNP 80009 151 0220 00 9660 151 0225 00 TRANSISTOR SILICON NPN 07910 523365 0687 151 0301 00 TRANSISTOR SILICON PNP 04713 2N2907A 0689 151 0221 00 TRANSISTOR SILICON PNP 07263 524849 Q691 151 0221 00 TRANSISTOR SILICON PNP 07263 9524849 Q694 151 0367 00 TRANSISTOR SILICON NPN SEL FROM 3571TP 80009 151 0367 00 0696 151 0367 00 TRANSISTOR SILICON NPN SEL FROM
93. ER MICROCIRCUIT DI MONOLITHIC 4 DECADE COUNTER MICROCIRCUIT DI QUAD 2 INPUT POS NAND GATE MICROCIRCUIT DI ML LEGEND GENERATOR Cl MICROCIRCUIT DI ML LEGEND GENERATOR R SEMICOND DEVICE ZENER 400MA 3V 5 SEMICOND DEVICE ZENER 0 4W 5 1V 5 SEMICOND DEVICE ZENER 0 4W 10V Mfr Code 01295 01295 07263 01295 04713 04713 04713 04713 01295 01295 04713 04713 04713 04713 04713 04713 04713 04713 01295 04713 04713 01295 01295 04713 04713 07263 07263 01295 04713 18324 04713 04713 04713 04713 07263 07263 18324 18324 18324 07263 04713 07263 18324 07263 07263 80009 80009 80009 01295 80009 80009 07910 07910 99942 Mfr Part Number SN7400N SN74LOON U6A740159X SN7402N MC1670L MC1662L MC1664L MC1662L SN7410N SN7412N MC1662L MC10102L MC10131L MC1662L MC1670L MC1670L MC10131L MC10131L SN7410N MC1670L MCl661L SN7400N SN7412N MC10131L 101311 9390 9390 SN74SOON MC10106L N8292A MC4044P MC1648P MC10131L MC10131L 9390PC 9390PC N8292A N8292A N8292A U6A740159X MC7404P U6A740159X M8290A 747 5PC 7475PC 155 0088 00 155 0090 00 155 0090 00 SN7400N 155 0087 00 155 0086 00 1N4372A 1N751A R4763 6 19 Electrical Parts List 7D15 Tektronix Serial Model I Mfr Ckt No Part No Dscont Name amp Description Code Mfr Part Number VR136 152 0278 00 SEMICOND 400
94. ERG RESET UST4A L To 8 Decade Counter AND GATE 28 584 STORAGE DISPLAY UPDATE U266D UATLIA C HOLD 527 ps3ex Pik A22 BUSY Fig 3 1 Signal flow for FREQ and Frequency Ratio modes 3 2 Gate also flips the Initiate Generator and in turn generates the Mono Update command This starts the Timer The signal to the Mono Update causes the information in the 8 Decade Counters to be stored and converted into the proper row and column set by the Display Time Control reset command is generated the entire instrument is now ready for another measurement cycle Frequency measurements can also be made by using 100 ms 1 s and 10 s Timing Standards The process is the same as for the 10 ms Time Standard except that the 10 ms clock pulses are diverted after passing through the A Arm circuit into a series of decade counters The output of the counters are selected by the TIME switch to give 100 ms 1 s or 10 s pulses The Time switch also provides commands to change the readout and legends for proper readout kHz MHz etc FREQUENCY MODE In the frequency mode U360A is enabled allowing the frequency to be counted from the B Armcircuitry to pass to U386B and U390 This unknown signal is connected to the main gate U386A via U386B This signal also clocks a D flip flop U390 The D input of U390 derived from the 10 millisecond time standard remains high for 10 milliseconds
95. ES FXD COMP 10K OHM 5 0 25W 01121 1035 R725 315 0103 00 RES FXD COMP 10K OHM 5 0 25W 01121 1035 R727 315 0102 00 RES FXD COMP 1K OHM 5 0 25W 01121 1025 R741 321 0344 00 RES FXD FILM 37 4K OHM 1 0 125W 75042 CEATO 3742F R743 315 0154 00 RES FXD COMP 150K OHM 5 0 25W 01121 1545 R744 315 0154 00 RES FXD COMP 150K OHM 5 0 25W 01121 1545 R746 315 0272 00 RES FXD COMP 2 7K OHM 5 0 25W 01121 2725 R748 315 0102 00 RES FXD COMP 1K OHM 5 0 25W 01121 1025 R750 321 0289 00 RES FXD FILM 10K OHM 1 0 125W 75042 CEATO 1002F R751 321 0323 00 RES FXD FILM 22 6K OHM 1 0 125W 75042 CEATO 2262F R753 321 0318 00 RES FXD FILM 20K OHM 1 0 125W 75042 CEATO 2002F R754 321 0352 00 RES FXD FILM 45 3K OHM 1 0 125W 75042 CEATO 4532F R756 311 1265 00 RES VAR NONWIR 2K OHM 10 0 50W 80294 3329 1 58 202 6 16 Ckt No R757 R760 R761 R764 R767 R769 R770 R773 R774 R775 R775 R776 R777 R778 R779 R781 R782 R783 R785 R786 R788 R790 R791 R792 R793 R795 R796 R797 R798 R799 R801 R802 R804 R807 R808 R809 R810 R812 R814 R816 R818 R820 R823 R825 R837 R854 R859 R860 R862 R865 R866 R867 R868 R870 R871 Tektronix Part No 321 0304 00 311 1265 00 321 0304 00 315 0103 00 315 0203 00 315 0154 00 315 0913 00 315 0103 00 315 0103 00 315 0223 00 315 0103 00 315 0103 00 315 0223 00 315 0223 00 315 0473 00 315 0473 00 315 0272 00 315 022
96. EVICE SILICON 30V 150MA 07910 1N4152 CR697 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR703 152 0071 00 SEMICOND DEVICE GERMANIUM 15V 40MA 14433 865 CR729 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR730 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR741 152 0322 00 SEMICOND DEVICE SILICON 15V 28480 5082 2672 CR757 152 0322 00 SEMICOND DEVICE SILICON L5V 28480 5082 2672 CR761 152 0322 00 SEMICOND DEVICE SILICON 15V 28480 5082 2672 CR762 152 0141 02 050000 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR766 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR767 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR768 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR769 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR771 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR775 152 0141 02 XBO50000 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR776 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR777 152 0141 02 050000 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR779 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR795 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR796 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR797 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR802 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR805 152 0141 02 SEMICOND DEVICE S
97. FOR SEMICONDUCTOR TYPES cH B RISI RIAT TRIG 97 1 FIT Ko LK aur BEAT VA Medo SEE PARTS LIST FOR EARLIER Jii Rig Ride OOK VALUES AND SERIAL NUMBER Bink Tusi GBOK RANGES OF PARTS MARKED pa T ii WITH BLUE OUTLINE i RISS ior 5157 CLOSED WHEN CRIG7 EVEL POT 15 FROM n MODE PERIOD FULLY CW GMBEE 4 DIAG gt TIM WIP 4 Riga TITS 11K cial T OUT pas Ol E j bd lo a 160 15 Rites l 44 aa 5 5 22mFl 7 5 y 50152 5 12 1 la KK Rina C135 gt 27 4 04 RIA 3 no 8194 s Cle 5 189 L 4 7 7 UN QI87 4 44 lv sE PARTIAL AG INTERFACE BOARD TRIGGER INPUT AMPS L MINI o INTERFACE BOARD AND WAVEFORMS L 26 wes aY LET PS Gy LIS LEE 0100 50 5 wT TE AA 0100 50 5 P uq i Potted Get ems Pose soms 1433 12 7015 R593 N Q584 R574 2 I 568 jn m 5 c a R573 e EN z Q253 5 R575 0574 9 o g s 8 Q258 C263 TE 8
98. FULLY CW 1 k FREQ B PARTIAL AT TIME BASE BOARD DIAG P2231 PARTIAL Al 5255 1 5 AY TIME CLOSED WHEN DISPLAY TIME POT IS FULLY CW Cua 262 0 4 i U264A UZL56h 7401 R262 200 SWITCHING PARTIAL AG INTERFACE BOARD RESET NOTES PARTIAL AS TIME AVERAGE SWITCH BOARD SEE DIAG 1 SEE PARTS LIST FOR SEMICONDUCTOR TYPES 2 S5EE TABLE ON DIAGRAM FOR it INFORMATION ALL VOLTAGES ARE DECOUPLED SEE DIAGRAM 6 FOR DETAILS m R E C 9NIHILIMS HE illu ias ed 4 TT pa 1 is 247 Pt La i 4 2 PR i z s al FX 5 COL Aa ee LF wer TIKAY M TVA RT d w g 4 Di r T TOS 3 lt 1 Y 4 4 Y dria 2 PI T IR r T X 3 TET u 1 ul ME QU 27 1 i 7 x z r 1 0 y t r x 4 shaded 17 F 1 8 da T dA 1 i ee I 1 i 867 71 88 R898 U654 av 1 1 24 e 8 1 Ht r sucer 1 ac i i A 2 fe
99. GGER controls select the counter triggering point From 1 to 108 events can be counted in this mode Frequency Measurements The 7D15 can measure frequencies directly from dc to 225 MHz when used in the FREQ mode To obtain greater resolution of low frequency measurements measure the period of the waveform calculate frequency Frequency 1 Period Frequency Ratio Measurements The ratio of one signal to another can be compared with a range of up to 10 1 and depending on the range a resolution of up to 1077 In the Frequency Ratio mode the standard or reference signal is usually connected to the EXT CLOCK IN and the signal to be compared is connected to the B Input connector PERIOD gt Fe ELELELE Operating Instructions 7D15 Time Interval Measurements TIM Two basic modes of time interval measurements can be selected TIM WIDTH and A B TIM WIDTH mode measures the time between two points on a wave form These points are selected by the A TRIGGER controls such that the counter main gate turns on at the point on the waveform selected by the A SLOPE and LEVEL controls and turns off at the same level but on the other slope See Fig 2 7c TIM mode like the TIM WIDTH mode measures the time between two points on a waveform These two points are controlled individually such that the A TRIGGER controls select the point on the waveform that turns the main gate on and the
100. GGER controls to obtain proper triggering The DISPLAY control determines the length of time that the digital display is shown on the CRT before the counter resets Period Measurements 1 Set the 7D15 MODE switch to PERIOD A the AVERG switch to X1 the GATE switch to NORM and the CLOCK switch to the desired resolution 2 11 Operating Instructions 7D15 2 Set the STORAGE switch to ON and the DISPLAY TIME control to the desired repetition rate 3 Connect the signal to be measured to the A Input connector and adjust the A TRIGGER controls for proper triggering Observe the PSEUDO GATE display on the CRT NOTE The CLOCK OUT signal may be used as the A Input Signal to show operation The period of the CLOCK OUT signal is selected by the CLOCK switch Period Averaging 1 Follow the procedures for Period Measurements 2 Set the AVERG switch to the number of averages desired i e with the CLOCK OUT signal connected through a 50 ohm terminator to the A Input the CLOCK switch set to 10 ns and the AVERG switch set to X1000 the 7015 digital display will be 10 00 ns 1000 1 count Frequency Measurements 1 Set the 7015 MODE switch to FREQ the GATE switch to NORM and the TIME switch to the desired measurement interval 2 Set the STORAGE switch to ON and the DISPLAY TIME switch to the desired repetition rate 3 Connect the signal to be measured to the B Input connector and adjust the B TRIGGER controls for
101. ICROCIRCUIT DI QUAD 2 INPUT NOR GATE MICROCIRCUIT DI QUAD 2 INPUT NOR GATE MICROCIRCUIT DI DUAL D MA SLAVE FLIP FLOP MICROCIRCUIT DI QUAD 2 INPUT NOR GATE MICROCIRCUIT DI MASTER SLAVE TYPE D F F MICROCIRCUIT DI MASTER SLAVE TYPE D F F MICROCIRCUIT DI DUAL D MA SLAVE FLIP FLOP MICROCIRCUIT DI DUAL D MA SLAVE FLIP FLOP MICROCIRCUIT DI 3 INPUT NAND GATE MICROCIRCUIT DI MASTER SLAVE TYPE D F F MICROCIRCUIT DI DUAL 4 INPUT GATE MICROCIRCUIT DI QUAD 2 INPUT POS NAND GATE MICROCIRCUIT DI 3 INPUT POS NAND GATE MICROCIRCUIT DI DUAL D MA SLAVE FLIP FLOP MICROCIRCUIT DI DUAL D MA SLAVE FLIP FLOP MICROCIRCUIT DI DECADE COUNTER TTL MICROCIRCUIT DI DECADE COUNTER TTL MICROCIRCUIT DI QUAD 2 INPUT NAND GATE MICROCIRCUIT DI TRIPLE 4 3 3 INP NOR GATE MICROCIRCUIT DI DIV BY 2 AND 5 RIPPLE CNTR MICROCIRCUIT DI SGL FREQ PHASE DETECTOR MICROCIRCUIT LI EMITTER COUPLED OSCILLATOR MICROCIRCUIT DI DUAL D MA SLAVE FLIP FLOP MICROCIRCUIT DI DUAL D MA SLAVE FLIP FLOP MICROCIRCUIT DI DECADE COUNTER TTL MICROCIRCUIT DI DECADE COUNTER TTL MICROCIRCUIT DI DIV BY 2 AND 5 RIPPLE CNTR MICROCIRCUIT DI DIV BY 2 AND 5 RIPPLE CNTR MICROCIRCUIT DI DIV BY 2 AND 5 RIPPLE CNTR MICROCIRCUIT DI QUAD 2 INPUT NAND GATE MICROCIRCUIT DI HEX INVERTER MICROCIRCUIT DI QUAD 2 INPUT NAND GATE MICROCIRCUIT DI DIV BY 2 AND 5 RIPPLE CNTR MICROCIRCUIT DI QUAD LATCH TTL MICROCIRCUIT DI QUAD LATCH TTL MICROCIRCUIT DI ML LEGEND GENERATOR C2 MICROCIRCUIT DI MONOLITHIC 4 DECADE COUNT
102. IG 1 f AN me 6 z LEVEL 7015 Fig 1 1 7015 Universal Counter Timer 225 UNIVERSAL 4 COUNTER TIMER 1432 1 Section 1 7D15 SPECIFICATIONS The 7D15 is a digital counter plug in designed for use with all readout equipped 7000 Series Oscilloscope mainframes It will function in any plug in compartment however in the vertical compartment a selectable display is internally con nected to the oscilloscope When used in the horizontal compartment mainframe triggers are available to the 7D15 The 7D15 has eight modes of operation Frequency DC to 225 MHz direct Frequency Ratio O to 10 1 Period 10 ns to 105 s Period Averaging 10 ps resolution TIM 10 ns to 10 s TIM Averaging 1 ns accuracy Totalize 1 to 103 events Manual Stop Watch to 10 5 The electrical specifications listed in the Performance Requirement column are valid over the stated environmental range for instruments calibrated at an ambient temperature of 20 C to 30 C and after a five minute warmup unless otherwise noted The electrical specifications listed in the Supplemental Information column indicate typical instrument operation and is not intended to be construed as a requirement for proper instrument operation TABLE 1 1 ELECTRICAL CHARACTERISTICS Characteristics Performance Requirement MEASUREMENT MODES Frequency Mode Range DC to 225 megahertz Resolution 0 1 hertz
103. ILICON 30V 150MA 07910 1N4152 CR823 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR824 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR825 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR826 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR827 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR828 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR829 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR830 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR837 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR838 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR845 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR846 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR853 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR854 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR859 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR860 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR861 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR862 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR864 152 0071 00 SEMICOND DEVICE GERMANIUM 15V 40MA 14433 865 Electrical Parts List 7D15 Tektronix Serial Model No Mfr Ckt No Part Eff Dscont Name amp Description Code Mfr Part Number CR865 152 0141 02 SEMICOND DEVICE SILICON 30V 150
104. IO E S E eC Fl DEI T III T T i T j ee d SHLNOW XIS G31LVH8I IVO LN3IANQS LSNI NL AM aui YOLVTHOSO IVNYSLNI ONISN SNOI LIGNOO aminda It rf tt et 222220511148 I T fe j I ji SS rc e L L 1 T vr a r rmcrx c c AA we AA HUTTE j D s j 8 1818 rm F a P 2 T sh ET p P Tp a aa 26 Sp ER IEP np a eee er 0 HLL IA m WU LIN MEA e 5 L ZHW 001 ZHW OL ZH 001 OL L LO ZH L zH OI ZH OOL ZH OOOL LNAWAYNSVAW ASVO LSHOM 1432 3 1 9 Specifications 7D 15 H Sf 7 LH 56 pU IEEE s a m v HERIDA 10 1 ub gt ms B di l
105. LR939 108 0537 00 COIL RF 200UH 80009 108 0537 00 LR944 108 0537 00 COIL RF 200UH 80009 108 0537 00 Q25 151 1025 00 TRANSISTOR SILICON JFE N CHANNEL 01295 SBA8129 Q32 151 0402 00 TRANSISTOR SILICON NPN SEL FROM 3571TP 01295 SKA6814 Q38 151 0271 00 TRANSISTOR SILICON PNP 01295 SKA4504 Q60 151 0206 00 TRANSISTOR SILICON NPN 94091 2SC288A Q65 151 0206 00 TRANSISTOR SILICON NPN 94091 25 288 Q72 151 0402 00 TRANSISTOR SILICON NPN SEL FROM 3571TP 01295 SKA6814 074 151 0402 00 TRANSISTOR SILICON NPN SEL FROM 357116 01295 SKA6814 Q79 151 0402 00 TRANSISTOR SILICON NPN SEL FROM 3571TP 01295 SKA6814 081 151 0402 00 TRANSISTOR SILICON NPN SEL FROM 3571TP 01295 SKA6814 087 151 0190 00 TRANSISTOR 11 04713 2N3904 0125 151 1025 00 TRANSISTOR SILICON JFE N CHANNEL 01295 65 8129 0132 151 0402 00 TRANSISTOR SILICON NPN SEL FROM 3571 01295 SKA6814 0138 151 0271 00 TRANSISTOR SILICON PNP 01295 SKA4504 9160 151 0206 00 TRANSISTOR SILICON NPN 94091 25 288 9165 151 0206 00 TRANSISTOR SILICON NPN 94091 25 288 0172 151 0402 00 TRANSISTOR SILICON NPN SEL FROM 3571TP 01295 SKA6814 0174 151 0402 00 TRANSISTOR SILICON NPN SEL FROM 3571TP 01295 SKA6814 Q179 151 0402 00 TRANSISTOR SILICON NPN SEL FROM 3571TP 01295 SKA6814 Q181 151 0402 00 TRANSISTOR SILICON NPN SEL FROM 3571TP 01295 SKA6814 Q187 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 Q203 151 0402 00 TRANSISTOR SILICON NPN SEL FROM 3571TP 01295 SKA6814 Q213 151 0402 00
106. MA 07910 1 4152 CR866 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR867 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR868 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR869 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR870 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR871 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR873 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR874 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR875 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1 4152 CR876 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR878 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR879 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR880 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR881 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR884 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR888 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR890 152 0322 00 SEMICOND DEVICE SILICON 15V 28480 5082 2672 CR897 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR898 152 0322 00 SEMICOND DEVICE SILICON 15V 28480 5082 2672 CR900 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR902 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR904 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR905 152 0141 02 SEMIC
107. ODES A diode can be checked for an open or shorted condition by measuring the resistance between terminals With an ohmmeter scale having an internal source of between 800 millivolts and 3 volts the resistance should be very high in one direction and very low when the leads are reversed Do not use an ohmmeter scale that has a high internal current High currents may damage the diodes C RESISTORS Check resistors with an ohmmeter Resistor tolerance is given in the Electrical Parts List Resistors normally do not need to be replaced unless the measured value varies widely from the specified value D CAPACITORS A leaky or shorted capacitor can be detected by checking resistance with an ohmmeter on the highest scale Use an ohmmeter which will not exceed the voltage rating of the capacitor The resistance reading should be high after initial charge of the capacitor An open capacitor can best be detected with a capacitance meter or by checking whether the capacitor passes ac signals 7 Repair and Readjust the Circuit Special techniques required to replace components this unit are given under Component Replacement Be sure to check the perfor mance of any circuit that has been repaired or that has had any electrical components replaced Recalibration of the affected circuit may be necessary CORRECTIVE MAINTENANCE GENERAL Corrective maintenance consists of component replace ment and instrument repair Special tec
108. ODX0 205 L SWITCH PUSH SPST WASHER LOCK INTL 0 172 ID X 0 331 OD STL BUSHING SLEEVE PRESS MOUNT CONNECTOR RCPT COAXIAL CONNECTOR RCPT COAXIAL HOLDER DIODE SUBPANEL FRONT ATTACHING PARTS SCR TPG THD FOR 6 32 X 0 50 INCH PNH STL Ww SUBPANEL INCLUDES JACK TIP GRAY BOARD ASSY GATE SEE Al EPL ATTACHING PARTS SCREW MACHINE 1 72 X 0 25 82 DEG FLH STL SS o BOARD ASSY MODE SEE 2 EPL ATTACHING PARTS SCREW MACHINE 1 72 X 0 25 82 DEG FLH STL lt m Mfr Code 80009 80009 80009 74445 80009 74445 80009 74445 80009 80009 80009 80009 73743 79807 78189 80009 13257 80009 80009 80009 80009 80009 80009 80009 73743 78189 24931 80009 80009 09353 73743 78189 79807 80009 81073 78189 80009 74868 98291 80009 80009 87308 71279 77250 77250 Mfr Part Number 337 1064 00 366 1391 00 366 1077 00 OBD 366 1146 01 OBD 366 1408 00 OBD 366 1257 97 366 1257 99 366 1257 98 426 0681 00 2 20319 402 OBD 1214 05 00 0541 366 1051 41 52 022 094 0187 333 1583 00 348 0235 00 105 0076 00 214 1280 00 214 1054 00 105 0075 00 358 0029 05 2 28269 402 1220 02 00 0541 28JR200 1 131 1315 00 210 0255 00 71035 2 2 20319 402 2101 14 03 2520 OBD 358 0464 00 39 1 1208 00 00 0541 358 0378 00 27 3 51 0
109. OND DEVICE SILICON 30V 150MA 07910 1N4152 CR906 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR908 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR909 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR911 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR912 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR914 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR916 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR917 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR918 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR920 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR921 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 5221 150 0048 01 LAMP INCAND NO 683 SELECTED 80009 150 0048 01 55223 150 0048 01 LAMP INCAND NO 683 SELECTED 80009 150 0048 01 DS599 150 0048 01 LAMP INCAND NO 683 SELECTED 80009 150 0048 01 DS699 150 0048 01 LAMP INCAND NO 683 SELECTED 80009 150 0048 01 F980 159 0042 00 FUSE CARTRIDGE 3AG 0 75A 250V FAST BLOW 71400 AGC3 4 Jl 131 0955 00 CONNECTOR RCPT BNC FEMALE 24931 287R200 1 2101 131 0955 00 24931 28JR200 1 2270 131 0372 00 CONNECTOR RCPT COAXIAL 98291 51 043 4300 2323 131 1003 00 CONNECTOR BODY CKT BD MT 3 PRONG 80009 131 1003 00 7325 131 1315 00 CONNECTOR RCPT BNC FEMALE 80009 131 1315 00 J440 131 0372 00 C
110. ONNECTOR RCPT COAXIAL 98291 51 043 4300 J470 131 0372 00 CONNECTOR RCPT COAXIAL 98291 51 043 4300 J601 131 0156 00 CONNECTOR RCPT COAXIAL 74868 27 3 J696 131 1003 00 CONNECTOR BODY CKT BD MT 3 PRONG 80009 131 1003 00 J697 131 0156 00 CONNECTOR RCPT COAXIAL 74868 27 3 L39 108 0433 00 COIL RF 0 09UH 80009 108 0433 00 L41 108 0440 00 COIL RF 8UH TOROIDAL INDUCTOR 180009 108 0440 00 169 108 0420 00 COIL RF 60NH 80009 108 0420 00 L139 108 0433 00 COIL RF 0 09UH 80009 108 0433 00 6 7 Electrical Parts List 7D15 Tektronix Serial Model Mfr No Part No Eff Dscont Name amp Description Code Mfr Part Number 1141 108 0440 00 COIL RF 8UH TOROIDAL INDUCTOR 80009 108 0440 00 L169 108 0420 00 COIL RF 60NH 80009 108 0420 00 L203 276 0569 00 CORE TOROID 80009 276 0569 00 L213 276 0569 00 CORE TOROID 80009 276 0569 00 L283 108 0420 00 COIL RF 60NH 80009 108 0420 00 1286 276 0569 00 CORE TOROID 80009 276 0569 00 L430 276 0569 00 CORE TOROID 80009 276 0569 00 L432 108 0420 00 COIL RF 60NH 80009 108 0420 00 L641 108 0420 00 COIL RF 60NH 80009 108 0420 00 L980 108 0473 00 COIL RF 150UH 80009 108 0473 00 L996 108 0337 00 COIL RF 25UH 80009 108 0337 00 LR215 108 0333 00 COIL RF 0 9UH 80009 108 0333 00 LR491 108 0333 00 COIL RF 0 9UH 80009 108 0333 00 LR532 108 0333 00 COIL RF 0 9UH 80009 108 0333 00 LR931 108 0537 00 COIL RF 200UH 80009 108 0537 00 LR936 108 0537 00 COIL RF 200UH 80009 108 0537 00
111. Pin 3 of U762 This causes Q782 and Q778 to latch putting a LO at Pin 10 of U790C This causes Pin 4 of U725B to go LO giving an overflow command to U741 GATING Because of the complexity of the various modes of operation the gating circuitry is discussed in each mode and we use a gt symbol displayed at the top of the screen Circuit Description 7D 15 AVERAGING COUNTERS lf a time standard other than 10 millisecond is used front panel TIME switch set to 100 ms 1 s or 10 s the 10 millisecond clock is deflected through the averaging counters In the 100 ms 1 s and 10s positions not X1 U371D disables U290C and enables U360D U463A is enabled at pin 4 via Q459 and U266B This deflects the 10 millisecond clock through U463A to the decade counter consisting of U496A U496B U499A and U499B When the front panel switch is set to 100 ms X10 Q529 is off The 10 millisecond clock is divided by 10 in the decade counter and the resulting 100 millisecond clock is connected to U374A and U374B via U463B and U360D Otherwise the operation is the same as for the 10 millisecond clock If the TIME switch is set to 1 s X100 Q529 is turned on and U478B is inhibited The output of the decade counter pin 14 U499B is connected to divide by 10 counter U519 via the level shifting network Q509 and Q512 The output of U519 is a 1 second pulse It is connected to U374A and U374B via U489B Q529 U463B and U360D When the TIME switch is s
112. S FXD COMP 27K OHM 5 0 25W 01121 2735 R45 321 0347 00 RES FXD FILM 40 2K OHM 1 0 125W 75042 4022 6 10 Electrical Parts List 7D15 Tektronix Serial Model No Mfr Ckt No Part Eff Dscont Name amp Description Code Mfr Part Number 75042 CEATO 1622F R47 321 0309 00 RES FXD FILM 16 2K OHM 1 0 125W R48 315 0684 00 RES FXD COMP 680K OHM 5 0 25W 01121 6845 R49 311 1235 00 RES VAR NONWIR 100K OHM 20 0 50W 80294 3389 31 104 R51 321 0384 00 RES FXD FILM 97 6K OHM 1 0 125W 75042 CEATO 9762F R52 321 0193 00 RES FXD FILM 1K OHM 1 0 125W 75042 1001 R53 321 0281 00 RES FXD FIIM 8 25K OHM 1 0 125W 75042 CEATO 8251F R55 315 0163 00 RES FXD COMP 16K OHM 5 0 25W 01121 1635 R571 311 0468 00 RES VAR NONWIR 100K OHM 20 0 50W 01121 GS 6588C R60 315 0821 00 RES FXD COMP 820 OHM 5 0 25W 01121 CB8215 R62 315 0101 00 RES FXD COMP 100 OHM 5 0 25W 01121 1015 R63 321 0162 00 RES FXD FILM 475 OHM 1 0 125W 75042 CEATO 4750F R65 315 0821 00 RES FXD COMP 820 OHM 5 0 25W 01121 8215 R67 315 0510 00 RES FXD COMP 51 OHM 5 0 25W 01121 5105 R69 315 0510 00 RES FXD COMP 51 OHM 5 0 25W 01121 5105 R71 315 0200 00 RES FXD COMP 20 OHM 5 0 25W 01121 2005 R73 315 0102 00 RES FXD COMP 1K OHM 5 0 25W 01121 1025 R75 315 0162 00 RES FXD COMP 1 6K OHM 5 0 25W 01121 1625 R76 315 0111 00 RES FXD COMP 110 OHM 5 0 25W 01121 1115 R7
113. SERTS ACTUATOR CAM SW BEARING CAM SW REAR SCR ASSEM WSHR 4 40 X 0 312 INCH PNH BRS NUT PLAIN HEX 4 40 X 0 188 INCH BRS SHLD ELECTRICAL INPUT CHANNELS ATTACHING PARTS SCR TPG THD CTG 2 56X0 25 100 DEG FLH STL a w Von m CPLG SHAFT FLEX FOR 0 125 INCH DIA SHAFTS COUPLING INCLUDES SETSCREW 4 40 X 0 188 INCH HEX SOC STL RING COUPLING 0 251 ID X 0 375 INCH OD AL CPLG SHAFT FLEX PLASTIC EXTENSION SHAFT 0 125 DIA X 2 34 INCH LONG CKT BOARD ASSY INTERFACE SEE A6 EPL ATTACHING PARTS SCREW MACHINE 4 40 X 0 188 100 DEG FLH STL NUT BLOCK 0 38 X 0 25 X 0 282 0A SCR ASSEM WSHR 4 40 X 0 312 INCH PNH BRS ne BOARD ASSY INCLUDES CONTACT ELEC 0 71 INCH LONG CONTACT ELEC 0 46 INCH LONG CONTACT ELEC 0 365 INCH LONG CONTACT ELEC 0 885 INCH LONG CONNECTOR BODY CKT BD MT 3 PRONG CONTACT ELEC 0 188 INCH LONG TERM TEST PT 0 40 INCH LONG RESISTOR VAR SEE R328 ATTACHING PARTS NUT PLAIN HEX 0 25 32 X 0 312 INCH BRS WASHER LOCK INTL 0 26 ID X 0 40 OD STL PLATE VAR RES M CIRCUIT BOARD MOUNTING HOLDER COAXIAL GROUNDING FOR 0 125 DIA COA GUIDE POST LOCK 0 65 INCH LONG GUIDE POST LOCK 0 65 INCH LONG PANEL REAR ATTACHING PARTS SCR TPG THD FOR 6 32 X 0 50 INCH PNH STL SPACER SLEEVE 0 18 ID X 0 25 OD X 0 10 L emo A SPRING HLCPS 0 251 OD X 0 375 L SST WIRE SPRING GROUND FLAT FR SECT PLUG IN BOTTOM FR SECT PLUG IN TOP CON
114. Signal an em Averaging Path Signal Circuit Description 7D15 Decimal point legends etc representing the state of front panel switches are also converted into row and column currents to encode the Tektronix 7000 Series readout system RESET The internally generated Reset and Reset signals are generated at the end of display time or by a Ext Reset command The function of the Reset and Reset commands are to set the Eight Decade Counters set the Averaging Counters provide a busy signa to external equipment and to set then clear the Initiate generator Ext Reset resets the entire instrument including the display DISPLAYED WAVE FORM SWITCHING Q303 U245A B C 5500 To 8 Decade Counter AND GATE 55954 INITIATE STORAGE Cp U5718 DISPLAY UPDATE 4971 B D HOLD B22 USSOA B A22 BUSY Fig 3 5 Signal flow for TIM B mode 3 7 Circuit Description 7D15 TRIGGER INPUT AMPLIFIERS Refer to Diagram 1 Connectors J1 and J101 provide a means for connecting the A and B signals to the 7D15 With the A COUPL switch in the DC position the signal connected to the CH A input is connected to the ASENS switches through C4 and R4 With the A COUPL switch in the AC position the path is through C2 and R2 and the dc blocking capacitor C5 The A signal then passes through the X100 attenuator the X10 attenuator or passes directly to the AC Amplifier depending upon the A TRIGGER SENS switch po
115. TACT ELEC 0 48 L 22 26 AWG WIRE EYELET METALLIC 0 152 OD X 0 245 INCH L BRS Mfr Code 83385 78189 73743 78189 80009 80009 70276 80009 97464 80009 80009 80009 80009 80009 80009 80009 83385 73743 80009 45722 80009 74445 80009 80009 80009 83385 80009 83385 22526 22526 22526 22526 80009 22526 80009 73743 78189 80009 80009 80009 80009 80009 87308 80009 80009 80009 80009 80009 22526 80009 Mfr Part Number OBD 1202 00 00 0541 2 20319 402 1214 05 00 0541 386 1792 00 376 0141 00 OBD 384 0247 00 3100 43 55 214 1139 00 214 1139 02 214 1139 03 214 1127 00 401 0081 01 105 0352 00 401 0146 00 OBD 2 12161 402 337 1647 00 OBD 376 0051 00 OBD 354 0251 00 376 0049 00 384 1140 00 OBD 220 0547 01 OBD 47351 47350 47357 47353 131 1003 00 75060 214 0579 00 2 20319 402 1214 05 00 0541 386 2273 00 352 0238 00 351 0188 00 351 0185 00 386 1402 00 OBD 361 0326 00 214 1140 00 214 1061 00 426 0499 01 426 0505 04 47439 210 0774 00 8 5 Mechanical Parts List 7D15 Fig amp Index No 1 130 131 132 133 134 135 136 137 138 139 140 141 Tektronix Serial Model No Part No Eff 210 0775 00 175 0825 00 175 0826 00 175 0827 00 175 0828 00 175 0829 00 352 0171 00 352 0169 00 352 0161 00 352 0162 00 352 0163 00 352 0164 00 Dscont Qty 4 FT FT FT FT Were b
116. TION To ensure instrument accuracy check the calibration of the 7D15 every 1000 hours of operation or every six months if used infrequently Before complete calibration thoroughly clean and inspect this instrument as outlined in the Maintenance section TEKTRONIX FIELD SERVICE Tektronix Inc provides complete instrument repair and recalibration service at loca Field Service Centers and the Factory Service Center Contact your local field office or representative for further information PERFORMANCE CHECK The performance of this instrument can be checked by performing only the y CHECK steps Performing the steps marked with a y indicates that the instrument is checked against the tolerances listed as a Performance Requirement see Specification section in Operators Manual Limits and tolerances given in other check steps are calibration guides and should not be interpreted as instrument specifications Front panel adjustments are adjusted as part of the Performance Check procedure CALIBRATION To verify proper calibration of the 7D15 and to prevent unnecessary recalibration of the entire instrument per form the Adjust portion of a step only if the tolerance given in the Check part of the step is not met For best overall instrument performance when perfor ming acomplete calibration procedure make each adjust ment to the exact setting even if the Check is within allowable tolerance TEST EQUIPMENT REQUIRE
117. TRANSISTOR SILICON NPN SEL FROM 3571TP 01295 SKA6814 Q217 151 0271 00 TRANSISTOR SILICON PNP 01295 SKA4504 Q227 151 0254 00 TRANSISTOR SILICON NPN 03508 2N5308 Q253 151 0190 00 TRANSISTOR SILICON NPN 04713 2 3904 Q258 151 0510 00 TRANSISTOR SILICON UNIJUNCTION 04713 2N4852 0275 151 0220 00 TRANSISTOR SILICON PNP 80009 151 0220 00 0277 151 0220 00 TRANSISTOR SILICON PNP 80009 151 0220 00 0285 151 0402 00 TRANSISTOR SILICON NPN SEL FROM 3571TP 01295 SKA6814 9303 151 0188 00 TRANSISTOR SILICON PNP 04713 2 3906 0312 151 0190 00 TRANSISTOR SILICON NPN 04713 2N3904 0316 151 0282 00 TRANSISTOR SILICON NPN 02735 2N5179 0319 151 0282 00 TRANSISTOR SILICON NPN 02735 2N5179 Q330 151 0190 01 060000 TRANSISTOR SILICON NPN 07910 TE23652 Q332 151 0188 00 TRANSISTOR SILICON PNP 04713 2 3906 Tektronix Serial Model Mfr Ckt No Part No Eff Dscont Name amp Description Code Mfr Part Number 0336 151 0282 00 TRANSISTOR SILICON NPN 02735 2 5179 0339 151 0282 00 TRANSISTOR SILICON NPN 02735 2 5179 0354 151 0188 00 TRANSISTOR SILICON PNP 04713 2N3906 Q367 151 0301 00 TRANSISTOR SILICON PNP 04713 2N2907A 0369 151 0225 00 TRANSISTOR SILICON NPN 07910 523365 9375 151 0188 00 TRANSISTOR SILICON PNP 04713 2 3906 0393 151 0301 00 TRANSISTOR SILICON PNP 04713 2N2907A 9424 151 0188 00 TRANSISTOR SILICON PNP 04713 2N3906 0427 151 0188 00 TRANSISTOR SILICON PNP 04713 2N3906 0429 151 0402 00 TRANSISTOR SILICON NPN S
118. Tektronix Inc P O Box 500 Beaverton Oregon 97077 070 1433 00 TEKTROND G 7D15 UNIVERSAL _ COUNTER TIMER INSTRUCTION MANUAL Serial Number First Printing SEP 1974 WARRANTY All TEKTRONIX instruments are warranted against defective materials and workmanship for one year Any questions with respect to the warranty should be taken up with your TEKTRONIX Field Engineer or representative All requests for repairs and replacement parts should be directed to the TEKTRONIX Field Office or representative in your area This will assure you the fastest possible service Please include the instrument Type Number or Part Number and Serial Number with all requests for parts or service Specifications and price change privileges reserved Copyright 1974 by Tektronix Inc Beaverton Oregon Printed in the United States of America All rights reserved Contents of this publication may not be reproduced in any form without permission of Tektronix Inc U S A and foreign TEKTRONIX products covered by U S and foreign patents and or patents pending TEKTRONIX is a registered trademark of Tektronix Inc SECTION 1 SECTION 2 SECTION 3 SECTION 4 SECTION 5 SECTION 6 SECTION 7 SECTION 8 TABLE OF CONTENTS SPECIFICATION Introduction Electrical Characteristics Environmental Characteristics Physical Characteristics OPERATING INSTRUCTIONS Installation Front Panel Controls and Connectors Mode
119. U THDS ATTACHING PARTS SCR ASSEM WSHR 4 40 X 0 312 INCH PNH BRS m m COVER CAM SW ATTENUATOR ATTACHING PARTS SCREW 4 40 X 0 25 INCH PNH STL WASHER LOCK INTL O 12 ID X 0 26 0D STL mw m QW ee ee Mfr Code 22526 77250 22526 77250 22526 80009 80009 24618 22526 00779 00779 80009 80009 80009 80009 83385 86445 80009 22526 22526 00779 00779 80009 80009 80009 80009 80009 83385 80009 80009 80009 42838 00779 22526 80009 80009 80009 83385 80009 83385 78189 Mfr Part Number 47357 OBD 47350 OBD 47350 337 1433 00 343 0089 00 700 3688 75060 86250 2 86282 2 214 0579 00 344 0154 00 211 0155 00 361 0301 00 OBD OBD 129 0317 00 47357 75060 86250 2 1 331892 8 214 0579 00 260 0723 00 337 0607 00 211 0155 00 361 0238 00 OBD 407 1048 00 131 1030 00 131 1031 00 RA 29952715 2 330808 7 75060 260 1227 01 260 1132 00 220 0455 00 OBD 200 1390 00 OBD 1204 00 00 0541C Fig amp Index No 1 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 Tektronix Serial Model No Part No Eff 211 0022 00 210 0001 00 210 0583 00 210 0046 00 386 1792 00 376 0141 00 213 0075 00 384 02
120. a Connect the DVM between the Channel A TRIG LEVEL jack and ground b Check for a DVM reading of 0 5 V to 0 5 V or greater while rotating the Channel A LEVEL control from fully counterclockwise to fully clockwise but not in detent c Connect the DVM between the Channel B TRIG LEVEL jack and ground d Check for a DVM reading of 0 5 V to 0 5 V or greater while rotating the Channnel B LEVEL control from fully counterclockwise to fully clockwise but not in detent e Disconnect all test equipment 2 TRIGGER PRESET CHECK ADJUST a Set the 7D15 A and B LEVEL controls to PRESET b Connect the input of the Vertical Plug In unit between test point 41 see Figure 5 1 and ground using a 10X probe Set the Vertical Plug In sensitivity to 5 mV division to obtain 50 mV division with 10X probe Connect a 3 MHz sine wave through Feed Through Termination and 10X Attenuator to the Channel A Input Adjust the amplitude of the Sine Wave Generator to obtain a four division crt display d Check that the aberrations are centered about the center of the sine wave see Figure 5 2 Fo ey 4 ro as net ec a y j Ca ater then Rag fo center the eun of the sine wave see Figure 5 2 uet f Move the 10 probe to test point 141 g Check that the aberration are centered about the center of the sine wave see Figure 5 2 Si uel Jed present c
121. a ue A ya 7 2 10151 149g Va Irt Vs CH 51 IOO 4 5 T342 RASS 2336 75 3 3 x Re L3 Va 662 a js S10 EEEE 24773 240 59 R335 5v 5 RETI IK U53651 4 Cott 4500 RST 0571 QSTA eoi RETA ATO oy is 5902 285 4 E293 9 R54 E IK F NOTE SEE PARTS LISTS FOR SEMICONDUCTOR TYPES ALL VOLTAGES ARE DECOLPLED SEE DIAGRAM lt FOR DETAILS GATING CONTROL LOGIC D cst i loa 0316 f 533 4606 TED QAI 1 2 5 T320 9 nee caia RSIS TG RDNS C322 en 5 v al auo DIAGRAM 75 _ 5189 48 J423 2 gt i R523 E 430 ISPLAYED x tr T ons WAVE FORM xe i 562 5336 2954 4 VA 682 5 T e 15 60 A QU r 7 a s 1662 rE 62 fz 59 VRAT 5 Uaos k 5 9382 4 5 26 RESET 2 EWw 620 5 ac p x EM e ar AM aia 41662 1370 is AME T 3 p 21 5y E 519 4 1 K s USTIA bees 385 Ut Ya lot E d ied xia ER CLOCK FROM G63 SEUSS sv qu RAIL DIAGRAM 8 5 R403
122. accessory connectors located on top of the Power Supply board 1 Check Control Settings An incorrect setting of the 7D15 controls can indicate a trouble that does not exist If there is any question about the correct function or operation of a control or front panel connector see the Operators Manual 2 Check Associated Equipment Before proceeding with troubleshooting check that the equipment used with this instrument is operating correctly If possible substitute an amplifier unit known to be operating correctly into the indicator unit and see if the problem persists Check that 4 2 the input signals are properly connected and that the interconnecting cables are not defective 3 Visual Check Visually check the portion of the instrument in which the trouble is suspected Many troubles can be located by visual indications such as unsoldered connections broken wires damaged circuit boards dam aged components etc 4 Check Instrument Performance Check the calib ration of the unit or the affected circuit by performing Performance Checks of Section 5 The apparent trouble may only be a result of mis adjustment and may be corrected by calibration 5 Check Voltages Often the defective component or stage can be located by checking for the correct voltage in the circuit Typica voltages are given on the diagrams however these are not absolute and may vary slightly between instruments To obtain operating conditions sim
123. adout display of ap proximatley 10 ns g Connect a 0 2 V dc level from the Oscilloscope Calibrator to the 7D15 A ARM Use one of the cables supplied with the 7D15 and a Feed Through Termination and connect it to the A ARM connector h Check that the readout display turns to zero after the RESET button is pressed i Disconnect all test equipment 16 CLOCK CHECK ADJUST a Connect the National Bureau of Standards Fre quency Standard NBSFS WWV to 7D15 B FREQ connec tor b Set the 7D15 MODE to FREQ B and the TIME to 5 ms c Check for a displayed readout of from 999 9995 kHz to 1000 0005 kHz If not within these tolerances follow the adjustment procedure starting with d d Connect the NBSFS WWV signal to the Time Base Plug In External input Externally trigger the Time Base Set the sweep rate to 0 1 us per division 5 12 e Connect the 7D15 CLOCK OUT to the Vertical Plug In input connector using one of the cables supplied with the 7D15 and a Feed Through Termination Set the Vertical Plug In sensitivity to 0 1 V per division f Connect one second markers from the Time Mark Generator to the External Z Axis input of the oscilloscope NOTE The displayed waveform will drift slowly to the left or right This represents a positive or negative clock error A drift to the left represents a error and a drift to the right represents a error With a Time Base sweep of 0 1 us per division a drift of on
124. amplitude at the input to the counter gate circuit dv dt is the signal slope at the input to the gate K is equal to 2E npk dv dt Supplemental Information Performance Requirements Characteristics INPUT SIGNALS CH A amp B Frequency Range CH B only DC Coupled AC Coupled Sensitivity CH A amp B Inputs TRIG SOURCE Input Resistance and Capacitance Minimum Pulse Width Minimum gate OFF time Between Samples During TIM Averaging Operation Maximum Input Voltage DC to 225 megahertz 5 hertz to 225 megahertz 100 millivolts peak to peak 0 5 divisions of vertical deflection derated at higher frequencies Approximately 1 megohm 22 picofarads 5 nanoseconds 10 nanoseconds 200 volts DC linearly derated to 20 volts E max 20 180 1 Fi MHz 200 at 200 megahertz Specifications 7D15 TABLE 1 1 cont Characteristics Performance Requirements Supplemental Information Minimum Signal Period in 10 nanoseconds PER Mode Minimum CH A Input Pulse 10 nanoseconds Width in FREQ B CH A Gate Mode Triggering Preset Position Automatically triggers at O volts Level Control Range CH A and CH B 1 V 500 millivolts 1 5 volts 10 V 50 volts Range TRIG SOURCE Approximately 2 5 divisions Arming Inputs Input R and C Approximately 10 kilohm 20 picofarads Lead Time for Pulse to 5 nanoseconds become effective Lead Time to Nega
125. ansfer it to U741 The O output pulses of the biquinary counter equal one tenth of the actual count These pulses are connected to the decade counter U728 via Q703 and Q701 The BCD output of U728 is connected to storage register U732 which at the proper time stores the count and transfers it to U741 The BCD output of U732 corresponds to the tens digit R743 and R744 supplies the extra 0 1 mA of current needed to correct the output of U741 The C and D outputs of U728 are connected to the clock input of U587 CR729 and CR730 connect the C and D outputs of U728 to provide a wide usable pulse U758 contains four decade counters four 4 bit storage registers and four BCD to analog converters The BCD to analog converters are connected to respectively time slot 7 time slot 6 time slot 5 and time slot 4 This provides the proper column currents for the 100 s 1000 s 10 000 s 100 000 s digits R756 standardizes the current levels so that they are compatible with the oscilloscope readout system Pin 6 of U758 is the current output line The count output of U758 is connected to the input of U762 U762 is similar to U758 except only two decade counters and two 4 bit latches and two BCD to analog converters are used Pins 14 and 13 supply the time slot 3 and time slot 2 pulses for the 1 millions and 10 millions digits R760 standardizes the output of U762 so that it is compatible to the oscilloscope readout system Circuit Description
126. ately 5 Hz to pass P P SENS 1 V 1 V 10 V Positions Select the sensitivity of channel B trigger amplifier TRIG SOURCE Position Selects the internal vertical amplifier trigger signal when installed in a horizontal compartment LEVEL Control Controls the DC level of the channel B trigger amplifier The PRESET Position LEVEL control fully clockwise sets the DC trigger level to O volts TRIG LEVEL Jack May be used to monitor the DC trigger level or when the P P SENS switch is in the TRIG SOURCE position the TRIG LEVEL jack can be used to externally set the DC trigger level SOURCE Switch The outward position of the SOURCE pushbutton switch internally connects the signal at A Input to both A trigger amplifier and B trigger amplifier The inward position of the SOURCE switch connects the B Input to the B trigger amplifier The A Input remains connected to the A trigger amplifier 1432 9 Figure 2 2 2 3 Operating Instructions 7D15 FRONT PANEL CONTROLS AND CONNECTORS ae TIR GATE PLAY TIME e gt OFF NORM ON 8 MODE TIME AVERG CLOCK EZ l ns 8 m E WIDTH 18f ns id x uw a 0 FRED i f vooo GATE EXTCLOCKIN CLOCK OUT fms M 3 5 TRIGGER w Ta B em 5 ona SEDEM ol I OUT nc DUT INPUT
127. b ge go CH eg 8 82 1 LLL Z O gt 2 9 9 9 aZzsw 3 gt FO O TT TTS G A A ed LA 1 1 E s E SI a se recs pL i eun p I miss H _ 4 An ole inan EIS JT HIH MH 89 ELLAS HEISE i A HH H 4 Ju p gt CEA i ILL LE B Wasa X41 HES FE A 1 HOHH3 LN3W3HnSV3N 3SV9 LSHOM 7 Ao 10 1 1 01 001 0001 1 GHz 100 MHz 10 MHz 1 MHz 100 KHz 10 KHz KHz INPUT FREQUENCY 1432 2 Fig 1 2 7D15 Frequency mode accuracy stated in percent Specifications 7D 15 21191 ui pazeys Asuanbaiy GLAZ L Big AONANDAYSA LONI Mr um 0 Bt E UBI _ OWL 3S 1V4 ON WHOSASAVM NO Q3UHIS3G LV A INO SH 19090 NOILINDOOSY 44349914L ne CENT IE Jouve i 9NILVH3dO LNAWNYISNI
128. cate item relationships Following is an example of the indentation system used in the description column 12345 amp Description Assembly and or Component Attaching parts for Assembly and or Component Detail Part of Assembly and or Component Attaching parts for Detail Part Parts of Detail Part Attaching parts for Parts of Detail Part Attaching Parts always appear in the same indentation as the item it mounts while the detail parts are indented to the right Indented items are part of and included with the next higher indentation The separation symbol indicates the end of attaching parts Attaching parts must be purchased separately unless otherwise specified ITEM NAME In the Parts List an Item is separated from the description by a colon Because of space limitations an Item Name may sometimes appear as incomplete For further Item Name identification the U S Federal Cataloging Handbook H6 1 can be utilized where possible ABBREVIATIONS INCH ELCTRN ELECTRON NUMBER SIZE ELEC ELECTRICAL ACTR ACTUATOR ELCTLT ELECTROLYTIC ADPTR ADAPTER ELEM ELEMENT ALIGN ALIGNMENT EPL ELECTRICAL PARTS LIST AL ALUMINUM EQPT EQUIPMENT ASSEM ASSEMBLED EXT EXTERNAL ASSY ASSEMBLY FIL FILLISTER HEAD ATTEN ATTENUATOR FLEX FLEXIBLE AWG AMERICAN WIRE GAGE FLH FLAT HEAD BD BOARD FLTR FILTER BRKT BRACKET FR FRAME or FRONT BRS BRASS FSTNR FASTENER BRZ BRONZE FT FOOT BSHG BUSHING FX
129. clears the Arm Gate and holds it until after the preselected number of averages The AND Gate therefore opens and closes to allow the main gate to make 10 100 and 1 000 separate measurements DISPLAYED WAVEFORM SWITCHING To 8 Decade Counter 55954 STORAGE DISPLAY UPDATE U550A 5 0 A22 BUSY Fig 3 4 Signal flow for TIM WIDTH A mode 3 6 OUTPUTS The Display Waveform Amplifier can present any one of three waveforms The Pseudo Gate CH B or True Gate The Pseudo Gate signal is the Gate Generator output This waveform represents the time that the Main Gate would be open if the Arm Gate Generator would allow it The True Gate waveform is the actual time that the main Gate is open The CH B output of the Displayed Waveform Amplifier is the B signal after it has been processed through the attenuators amplifiers shaper slope amplifier and B Arm circuit COUNTERS AND READOUT Pulses from the Main Gate are counted by the Eight Decade Counters Upon a Display Update command the information is stored and converted into the proper row and column currents necessary to encode the Tektronix 7000 Series readout system ENENEN Channel A Signal 9906090906 Channel B Signal PULSE GENERATOR U287A From Slope Switch BY PASS AMPLIFIER U2 0A From Switch A ARM SWITCHING Q445 4454 447 147218 Uu m U 51A AVERAGING COUNTERS 9518 952 Clock
130. cted by the A TRIGGER section to measure periods of 10 ns to 10 s TIM WIDTH A The 7D15 starts on the slope and level selected by the A TRIGGER section and stops at nearly the same level but the other slope The B TRIGGER section does not function in this mode TIM A B The 7D15 starts on the slope and level selected by the A TRIGGER section and stops on the slope and level selected by the B TRIGGER section Two completely separate signals may be used or for a single signal source use the A Input and the SOURCE switch The 7D15 measures frequency directly from DC to 225 MHz Signal connection is made via the B Input connector AVERAGE 10 ms 100 ms 1 s 10 s Pushbuttons These switch positions are used in conjunction with the FREQ mode to select the measurement interval 1 X10 X100 X1000 Pushbuttons These switch positions are used in conjunction with the PERIOD A TIM X WIDTH modes to select the number of measurements to be averaged 10 ns 100 ns 1 us 10 us 1 ms Pushbuttons Selects the clock rates to be used 1432 12 Figure 2 5 MODES OF OPERATION Manual Stop Watch This mode uses the GATE ON OFF switches to manually turn the counter main gate on and off The counting rate is determined by the CLOCK switches Times of up to 105 s can be measured in this mode Event Counter the EVENTS mode the 7D15 counters accept information from the B Input connector The B TRI
131. d U450 R452 R75 TP430 R76 428 072 CU nm SL 9 74 L432 R432 081 079 R426 C284 0427 C169 R175 R176 R169 R284 0174 0172 o R283 R180 R183 Q277 one R182 R2 R275 275 0275 C273 R274 R273 circuit board 587 CR472 4 1 R473 E C332 489 E 9266 C472 R472 C491 R268 R525 Q490 R483 CR483 0475 2 R481 478 8 TAN So U351 C516 R453 R467 C481 R423 R422 Q424 CR467 R454 Q447 C69 CR448 Q467 R425 R69 a Rao 69 s C43 2 R73 R65 5 c yaw 41 c R38 5 TENA ts 2 5 5 i c Ow c co R60 R353 Q87 C40 R477 0354 CR167 CR168 C191 a 169 R129 iris R165 VR169 d R128 R171 59 cre R178 mr R162 gt T 0187 3 0132 3 163 o e e R163 o C140 Q138 C160 R160 C136 R138 R139 m R187 Tn E 5 VR136 L139 R243 ars Q227 244 in a e m g R597 R240 R245 CR445 CR328 T Rest R443 e R445 R47 R48 5 R45 Tm Hes 22 g 34 O Ras R229 R28 R357 R153 388 R389 R152 TH Doc m U143 A149 C133 R148 R271 R270 R147 1433 22 OFF ON FREG CH FROM TTE PART IA AT TIME BASE BOARD Hoss CLOCK 17674 DIAGRAM lt 5 5 RESET BiS JATO RESET EXT bu xl LJ 7
132. d writes one 0 With Q884 conducting its collector is low which gets coupled through CR884 placing a low at pin 2 of U890 and U898 Pin 2 is word ten and writes ms So with the TIME switch in the 10 ms position the characters MHZ 10mS is displayed on the lower readout location of the crt 3 12 TIME SLOT NUMBERS 6 7 8 SEVEN 0 EIGHT NINE 0 ELEVEN X 1 1 I 1 I FOUR FIVE SIX SEVEN EIGHT NINE TEN ELEVEN TWELVE Fig 3 7 Symbol and Word designation Matrix The characters for the 100 ms and 1 s switch positions are developed in a similar pattern However in the 10 s position the Q896 circuitry milli cruncher is required for a proper readout display In the 10 s position Q880 is turned on its collector goes low and the low is then coupled through CR878 and on to the DP5 line A low is also coupled through CR880 and CR881 placing a low at pins 12 and 2 of U890 and U898 Transistor Q884 still remains on so we see characters KHZ 10mS displayed on the crt To correct the reading the character m must now be removed Referring to Fig 3 6 Character Selection Matrix the lower case m requires 100 uA of column current and is written during time slot 9 as illustrated in Fig 3 7 Transistor Q896 serves as a three input NAND gate with 59 pins 12 and 3 of U890 providing the inputs These three lines a
133. e division per second blinks of the CRT or Z Axis blinks equals a clock error of 0 1 Hz The 5 MHz oscillator in the 7D15 has a frequency error to which it should be set This frequency error is printed on the oscillator The relation of clock error to frequency error is equal to the formula frequency error 5 clock error For example a frequency error of 1 5 Hz is marked on the 7D15 oscillator This represents a clock error of 1 5 5 or 0 3 Hz The oscillator frequency therefore should be adjusted for a drift of three divisions per second Since the error is negative the drift should be to the right g Calculate the clock error from the frequency error printed on the 7D15 oscillator See Figure 5 1 for location h Adjust the clock frequency to obtain the proper drift for the clock error calculated in step g Be sure the drift is in the proper direction NOTE Some oscillators use a metal cover screw Replacing this screw will change the oscillator frequency Check for correct error frequency with screw in place i Repeat steps a b and c j Disconnect all test equipment This completes the calibration for the 7015 Section 6 7D15 REPLACEABLE ELECTRICAL PARTS PARTS ORDERING INFORMATION Replacement parts are available from or through your toca Tektronix Inc Field Office or representative Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available
134. e triggered and the displayed readout is 10 ns g Disconnect all test equipment 14 INTERNAL TRIGGER SOURCE CHECK a Remove the 7D15 Plug In from the Flexible Ex tender and plug it directly into the A Horizontal compart ment of the oscilloscope mainframe Set the Channel A and B P P SENS controls to TRIG SOURCE b Connect a 100 MHz sine wave from the Sine Wave Generator to the Vertical Plug In through a Feed Through Termination and obtain a crt display of 0 5 division c Check that the 7D15 can be triggered and that the displayed readout is approximately 10 ns d Change the Sine Wave Generator frequency to 225 MHz and obtain a crt display of 0 5 division Change the 7015 MODE to FREQ B and the TIME to 10 ms f Check that the 7D15 can be triggered and that the displayed readout is approximately 225 MHz g Disconnect all test equipment Calibration 7D15 V15 A AND B ARM CHECK a Set 7D15 A and B P P SENS to 1 V b Connect the Sine Wave Generator to the 7D15 B FREQ connector and note a displayed readout of ap proximately 225 MHz c Connect the 4 V dc level from the Oscilloscope Calibrator to the 7D15 B ARM Use one of the cables supplied with the 7D15 d Check that the displayed readout is zero e Move the Sine Wave Generator to the A input Change the frequency control of the Sine Wave Generator to 100 MHz f Set the 7D15 MODE to PERIOD A AVERG to 1000 and CLOCK to 10 ns Note a re
135. ed 10 100 or 1000 is largely determined by the number of intervals available Overflowing the counter registers is another consideration for selecting the number of averages Time interval averaging should not be used when the interval being measured might vary during the measurement cycle a non repetitive signal or when signal repetition rate is synchronized with the counter clock rate The problems of synchronization are discussed later 11 ns gt INPUT T I TO BE MEASURED INTERNAL CLOCK GATED OUTPUT TO COUNT REGISTER 1 COUNT RECORDED 9006 OF THE TIME 2 COUNTS RECORDED 1096 OF THE TIME Unlike period averaging which turns the counter main gate on for a certain length of time time interval averaging makes a predetermined number of discrete measurements then averages these measurements to obtain the final answer For instance for 1000 averages the counter main gate is turned on and off 1000 times before the final answer is ready With a ten nanosecond clock it is possible to obtain accuracies of one nanosecond For example assume that the time interval to be measured is 11 nanoseconds The measurement is made and the results are totaled 1000 times In this case a ten nanosecond clock is used 1 1 pulses of the clock will occur during the measurement interval so 1100 counts would be expected to occur during 1000 measurements Since the counter cannot record a fractional count sometime
136. elay 10 ns connectors GH impedance 50 Q Delay 5 ns connectors GR 1 Tektronix Part Number impedance 50 017 0502 00 Fixed short with GR connectors Used for step 12 1 General Radio Type 874 WN Used for step 12 Calibration 7D15 CALIBRATION PROCEDURE GENERAL The following procedure is arranged so that the 7015 can be calibrated with the least interaction of adjustments and reconnection of equipment The control settings and test equipment setup throughout this procedure con tinue from the preceding step s unless otherwise noted Refer to Figure 5 1 for location of adjustments NOTE Control titles that are printed on the front panel of the 7D15 are totally capitalized in this procedure e g LEVEL Internal adjustments and associated equipment controls are initially capitalized only e g oscilloscope Vertical Mode PRELIMINARY PROCEDURE FOR CALIBRATION 1 Remove the side panels of the 7D15 2 Insert the Flexible Extender into the Right Vertical compartment of the oscillsocope Plug the 7D15 into the Flexible Extender 3 Insert the Time Base Plug in in the oscilloscope B Horizontal compartment 4 Insert the Vertical Plug In in the oscilloscope Left Vertical compartment 5 Connect oscilloscope to a suitable power source turn on and allow 20 minutes warmup before proceeding NOTE This instrument should be calibrated at an ambient temperature 20 C to 30 C for
137. en the ALEVEL control is rotated to its fully clockwise but not in detent and fully counterclockwise positions g Disconnect all test equipment V7 TRIGGER SLOPE POLARITY CHECK a Connect 1kHz 0 4 square wave from the Oscilloscope Calibrator to the 7D15 Channel A Input connector and also to the Time Base External Trigger Input Externally trigger the Time Base b Set the 7D15 to measure the TIM WIDTH A of the Calibrator signal Set the DISPLAYED WAVEFORM to PSEUDO GATE Set the Oscilloscope Vertical Mode to Right c Check that the displayed waveform is triggered on the positive slope when the A SLOPE switch is set to Check that the display is triggered on the negative slope when the SLOPE switch is set to released d Set the 7D15 MODE to FREQ B Change the DISPLAYED WAVEFORM to CH B e Check that the displayed waveform is triggered on the positive slope when the SLOPE switch is set to Check that the display is triggered on the negative slope when the SLOPE switch is set to released f Disconnect all test equipment 8 AC COUPLING CHECK a Set 7D15 MODE to PERIOD A AVERG switches to X1 CLOCK to 1 ms to AC and Triggers to Preset Connect 5 Hz 100 mV peak to peak signal from the Low Frequency Sine Wave Generator to the 7D15 A input NOTE Use the Vertical Plug in unit to set the amplitude of the Low Frequency Sine Wave Generator c Check fo
138. et to 10 s X1000 Q529 and U478B are enabled The output of U519 is divided by 10 in U521 is connected to U374A and U374B via U478C U478B and the path used for one second operation TIM WIDTH In the TIM Width A mode U374A is cleared and held via Q360 Q354 U351B and Q227 By means of 0227 TIM WIDTH also enables U360B and turns on Q367 The interval to be measured therefore bypasses U374A and connects to U386C via U360B U360C U290A U287D U290C and U287C The interval to be measured is inverted in U386C which presents a LO to pin 13 of U386D U374B is also clocked by the interval via Q367 As a result pin 15 of U374B goes LO and the output of U386D goes HI This presents a HI to the D input of U390 The clock is connected to the main gate via U371A and U386B U390 is toggled via Q393 which in turn enables the main gate and allows the clock to be counted At the end of the time interval pin 10 of U386C goes LO pin 13 of U386D goes HI pin 15 goes LO which is presented to the D input of U390 When U390 is toggled pin 3 goes Hl and the main gate U386A is inhibited At the same time U409A is clocked and the initiate commands are given Circuit Description 7D15 TIM AVERAGING TIM averaging is achieved by mak ing 10 100 or 1000 measurements before resetting the counters This is accomplished by holding the initiate generator U409A until after 10 100 or 1000 measurements are made In the TIM averaging mode
139. f averages taken It should be noted that the previous examples assume a uniform random distribution of time coincidence If the input time interval and clock is synchronized an erroneous answer may be given see Figure 2 11 The answer does not vary but is wrong Anything short of pure synchronization is usually acceptable If synchronization is suspected a check can be made by comparing the repetition rate of the time interval to be measured with the 7D15 clock rate This can be done by triggering the oscilloscope with the 7D15 PSEUDO GATE and observing the CLOCK OUT signal Since all the 7D15 Clock positions are synchronized with each other for the purpose of display a lower clock rate position can be used Synchronization is indicated by a display with little or no drift The amount of acceptable drift can be determined first by calculating the time needed to make a time interval average measurement T meas by the following Number of averages Repetition rate of measured time interval T meas Second observe the waveform and measure the time of one cycle of drift Correct for the time interval actually used Generally synchronization will not occur if this figure is less than T meas Example A time interval with a repetition rate of 100 kHz is being measured and averaged 1000 times using a clock of 10 ns 1000 100 kHz T meas 10 ms Operating Instructions 7D 15 1 75 TIME INTERVAL 10 1 ns 1 50
140. heck the existence Wike noteci Tria veg Taper oli reta p 5 5 Calibration 7D15 B pes DS U N CTs Aaigdis tard cin a cx caca ie CLOCK FREQUENCY ADJUSTMENT UNDER SCREW m 4 m i DERE i xm up REM EN LIBET IS Euri Rios cde RW procu Be 1433 7 Fig 5 1 Location of Adjustments and Test Points 5 6 ADJUST FOR EQUAL DISTANCE Calibration 7D15 CENTERED ON WAVEFORM 1433 8 Fig 5 2 Method for adjusting trigger preset h Adjust R149 to center the aberrations about the center of the sine wave see Figure 5 2 i Disconnect the Sine Wave Generator Leave 10X Probe connected for step 3 3 TRIGGER AMPLIFIER COMPENSATION CHECK ADJUST a Connect the Square Wave Generator to the A Input connector through 10X Attenuator and a Feed Through Termination Set the repetition rate to approximately 1 kHz Set the AMPLITUDE FAST RISE switch to AMPLITUDE b Set the 7D15 A and B COUPL switches to DC Set the Vertical Plug In sensitivity to 20 mV division and adjust the Square Wave Generator output amplitude to obtain a vertical display of five divisions Obtain a triggered display with a sweep rate of approximately 0 5 ms d Adjust R131 to obtain the best front corner e Move the 10X Probe to test point 41 see Figure 5 1 6
141. hertz signal is compared to the One Megahertz Standard in U628A The resulting output of U628B is a dc voltage level representing the phase difference between the One Megahertz Standard and the 1 megahertz signal from U662 This dc voltage level is connected through source follower Q633A to amplifier U628C Q633B is a current source to provide stabilization for Q633A The dc voltage at pin 8 of U628C is connected to varicap CR641 which in turn corrects the frequency of 100 megahertz oscillator U643 L641 is adjusted by squeezing or expanding the coil to ensure that CR641 is at the center of its operating range C638 C637 and R637 are used to slow the reaction time of the phase detector Circuit Description 7D15 ARM INPUTS A ARM With no input Q445 is biased off by divider R441 R443 and R444 This forward biases Q447 which holds the data input of U450 Pin 11 HI With the arrival of a clock pulse derived from the Channel A input via Q429 or in the frequency mode the 10 ms clock via U268A and Q467 pin 3 of U450 will go LO This enables Gate U287D to allow the Channel A signal to pass Gate U360D is also enabled to allow the averaging modes to be used To disable the Input ground is connected to the A ARM input This forward biases Q445 reverse biases Q447 and in turn places a LO at the data input of R450 With the arrival of the next clock pulse pin 3 will go HI to inhibit U287D and U360D B ARM With no in
142. hniques required to replace components in this instrument are given here OBTAINING REPLACEMENT PARTS STANDARD PARTS All electrical and mechanical part replacments for the 7D15 can be obtained through your local Tektronix Field Office or representative However many of the electronic components can be obtained locally in less time than ts required to order them from Tektronix inc Before purchasing or ordering replacement parts check the parts list for value tolerance rating and description NOTE When selecting replacement parts it is important to remember that the physical size and shape of a component may affect the performance of the Maintenance 7D15 instrument particularly at high frequencies All re placement parts should be direct replacments unless it is known that different component will not adversely affect instrument performance SPECIAL PARTS addition to the standard electronic components some special parts are used in the 7D15 These parts are manufactured or selected by Tektronix Inc in accordance with our specifications These special parts are indicated in the parts list by an asterisk preceding the part number Most of the mechanical parts used in this instrument have been manufactured by Tektronix Inc Order all special parts directly from your local Tektronix Field Office or representative ORDERING PARTS When ordering replacement parts from Tektronix Inc include the following informa
143. horizontal compartment and set the oscilloscope Horizontal Mode switch to the proper setting Adjust the time base unit throughout the procedures to obtain an optimum triggered display INPUT TIME INTERVAL INTERNAL CLOCK GATED OUTPUT TO COUNT REGISTER 3 COUNTS Operating Instructions 7D15 3 COUNTS ANSWER GIVEN 15 30 ns 1432 17 Fig 2 10 Results of pure synchronization between the clock rate and input time interval Set the 7D 15 controls as follows A and B TRIGGER SLOPE COUPL DC SENS AV LEVEL PRESET SOURCE INPUT B DISPLAYED WAVEFORM Switch PSEUDO GATE Manual Stop Watch 1 Set the 7015 GATE switch to OFF and set the MODE switch to PERIOD A 2 Select the desired counting interval a counting interval of 1 ms can be observed easily 3 Turn the STORAGE switch to OFF and the DISPLAY control to 55 4 The 7D15 is ready to count Use the GATE ON OFF switch to start and stop the counter Push the RESET button to reset the counter To obtain the total time of number of time measurements do not reset counter Event Counter 1 Set the 7D15 GATE switch to OFF and set the MODE switch to FREQ B 2 Turn the STORAGE switch to OFF and connect the signal to be counted to the B Input connector a 0 4 V 1 kHz oscilloscope calibrator signal may be used to show operation 3 Use the GATE ON OFF switch to start and stop the event counter f necessary adjust the B TRI
144. ilar to those used to take these readings see the instructions in the Diagrams section 6 Check Individual Components following methods are provided for checking the individual com ponents in the 7D15 Components which are soldered in place are best checked by disconnecting one end to isolate the measurement from the effects of surrounding circuitry A TRANSISTORS AND INTEGRATED CIRCUITS The best check of transistor operation is actual perfor mance under operating conditions If a semiconductor is suspected of being defective it can best be checked by substituting a component known to be good however be sure that circuit conditions are not such that a replacement might also be damaged If substitute transistors are not available use a dynamic tester such as Tektronix 576 Static type testers may be used but since they do not check operation under simulated operating conditions some defects may go unnoticed The schematic shows base pin and socket arrangements of semiconductor devices Be sure the power is off before attempting to remove or replace any semiconductor component Integrated circuits can be checked with a voltmeter test oscilloscope or by direct substitution A good under standing of the circuit description is essential to trouble shooting circuits using integrated circuits Use care when checking voltages and waveforms around the integrated circuits so that adjacent leads are not shorted together B DI
145. isolating major troubles in the unit Moreover minor troubles not apparent during regular operation may be revealed and corrected TROUBLESHOOTING GENERAL The following is provided to augment information contained in other sections of this manual when trouble shooting the 7D15 The schematic diagrams circuit descrip tion and calibration sections should be used to full advantage The circuit description section gives detailed information on circuit behavior and output requirements TROUBLESHOOTING AIDS DIAGRAMS Circuit diagrams are given on foldout pages in Section 7 The circuit number and electrical value of each component in this instrument are shown on the diagrams Important voltages and semiconductor lead con figurations are also shown COMPONENT LOCATOR The circuit boards used in the 7D15 are outlined on the schematic diagrams A representation of each circuit board is shown in most cases on the back of the preceding circuit diagram These board representations outline all the board mounted electrical components and identify them by their circuit number COMPONENT AND WIRING COLOR CODE Colored stripes or dots on resistors and capacitors signify electrical values tolerances etc according to the standard color code Components not color coded usually have the value printed on the body The insulated wires used for interconnection in the 7D15 are color coded to facilitate tracing a wire from one point to a
146. l passes through am ws ww Control Signal manual 6 amp Clock Signal 2 GENERATOR U287A VATIC BY PASS AMPLIFIER U2750A U360C ARM SWITCHING Q445 Q 453 COUNTERS 504 9518 5544 AVERG U266C U351B and Q354 from whence it clears U374A via Q460 and sets U374B via Q367 This in turn sets U386D LO placing a LO at the D input of U390 and eventually inhibiting the main gate U386A PERIOD Refer to Fig 3 3 for signal flow The period to be measured is selected from the signal connected to the A Input The trigger level is selected by the coupling switch attenuator level controls and slope controls The signal passes through the A Arm circuit to the Gate Generator and Arm Gate Generator The outputs of the Gate Generator and Arm Gate Generator go HI This causes the AND Gate to go HI and the Main Gate opens DISPLAYED WAVEFORM SWITCHING Q303 U295A 8 C 300 POSITION To 8 Decade Counter AND GATE UBBEC D 5554 STORAGE DISPLAY UP DATE 3 HOLD B22 U550A B b A22 BUSY 1433 2 Fig 3 2 Signal flow for Events mode 3 4 In the period mode the clock frequency selected by the CLOCK switch is connected to the Main Gate When the Main Gate is open the clock pulses are counted in the 8 Decade Counters The second waveform from the A circuitry sets the Arm Gate Generator LO and in turn sets the AND Gate LO thus closing the Main Gate The initiate command is
147. llowing Block diagram description is divided into these five categories INPUT The Input section conditions the signal for use in the Gating circuitry This section includes the signal source coupling amplitude polarity slope trigger level AARM and B ARM functions Input signals can be connected to the A or B Inputs depending on the mode used With the Source switch in the outward position the signal connected to the A Input is internally connected to the B input circuitry The AC DC Attenuator Blocks select the type of coupling and the amount of attenuation required In addition when the 7D15 is used in an oscilloscope horizontal plug in com partment the AC DC attenuator circuitry can select the oscilloscope internal triggers These triggers are generated in the vertical plug in unit The signals pass through the AC DC Attenuator to the A Amplifier and B Amplifier where the signal is amplified the dc trigger level is selected The Trigger Level connectors can be used as an output to show the actual dc trigger level selected or through the use of an external power supply can select the dc trigger level CLOCK The clock circuitry provides a standard against which the input signal is compared The standard is obtained either from a precision crystal oscillator which provides the One Megahertz Standard an external input connected to the EXT CLOCK IN orthe Voltage Controlled Oscillator referenced to either the O
148. m displayed on the crt is referenced to 0 V and has an amplitude of approximate ly 0 5 V f Disconnect all testequipment and return the INTER NAL EXTERNAL switch to INT 10 PHASE LOCK VOLTAGE CHECK ADJUST a Connect the DVM between test point 641 and ground See Figure 5 1 for location of test point 641 b Checkthatthe voltage reading is within 2 2to 2 9 V c Adjust the spacing of coil L641 to obtain a reading of 2 6 V 4 V d Disconnect all test equipment J 11 PERIOD A ACCURACY CHECK Connect 10 markers from the Time Mark Generator to the 7D15 Channel A connector through a Feed Through Termination b Set the 7D15 MODE switches to PERIOD A the AVERG switches to 1000 and the CLOCK to 10 ns Set A TRIGGER controls for proper triggering and GATE to NORM c Check for a display readout of 10 00 ns 1 count 1 Disconnect all test equipment 5 9 Calibration 7D15 PULSE GENERATOR OUT GR TO BNC ADAPTER pue ADAPTER SHORT CIRCUIT ADAPTER 1433 9 Fig 5 3 Equipment setup used to check TIM WIDTH A accuracy 12 TIM WIDTH AND TIME ACCURACY CHECK a Connect the positve going output of the Pulse Generator to the Vertical Plug In through a Feed Through Termination Adjust the amplitude of the Pulse Generator for a peak to peak amplitude of 500 mV b Remove the Feed Through Termination from the cable and connect as shown in Figure 5 3 C
149. ment If more information about commonly used circuits is desired refer to the following text books Jacob Millman and Herbert Taub Pulse Digital and Switching Waveforms McGraw Hill New York 1965 To understand the 7D15 readout circuitry a basic knowledge of the Tektronix 7000 Series readout system is required A brief synopsis labeled Readout Theory is given in this section More information is available in any service manual for a Tektronix 7000 Series readout equipped mainframe LOGIC FUNDAMENTALS Signal lines in this instrument are named to indicate the state at which the indicated function is performed For example the line labeled RESET means that the affected circuits are reset when this line is HI the line labeled RESET RESET NOT means that the affected circuits are reset when this line is LO BLOCK DIAGRAM DESCRIPTION GENERAL The following discussion is provided to aid in un derstanding the overall concept of the 7D15 before the individual circuits are discussed in detail A block diagram of the 7D15 is shown in the Diagrams section Only the basic interconnections between the individual blocks are shown on the block diagram Each block represents a major circuit within the instrument The number on each block refers to the schematic on which the complete circuit is found The Block Diagram is broken into five functional blocks Input Clock Gate Reset and Counters and Readout The fo
150. n and the RC Normalizer Set SOURCE to INPUT B b Follow the procedures given in Table 5 2 to check or adjust the Channel B input compensation Move w be te TRY c Repeat step 5a and use Table 5 3 to check adjust the Channel A input compensation Connect the Square Wave Generator to the Channel A Input Select SOVRCE d Disconnect all test equipment V6 TRIGGER RANGE CHECK a Connect the Vertical Plug In 10X Probe to test point 286 Set the Vertical Plug In sensitivity to 50 mV div b Set the 7015 A and B P P SENS to 1 V A and B COUPL to AC SOURCE to A INPUT and MODE to TIM c Connect a 1 0 V p p3 MHz sine wave to the Channel A input connector d Check that the display disappears when the B LEVEL control is rotated to its fully clockwise but not in detent and fully counterclockwise positions 5 8 TABLE 5 3 Channel A Compensation Set 7D15 Adjust Pulse ChaA Generator Best Flat P P SENS Amplitude for Waveform aay _ C12 C13 C10 Adjust for Long Term Rolloff and Spiking 0 32 div 0 32 div 0 32 div Remove one 10X attenuator Both 10X attenuators removed At may be necessary to remove the 50 termination to obtaina five division display Reinsert Feed Through Termination after check See Figure 5 1 for location of adjustment e Move the 10X Probe to test point 430 f Check that the display disappears wh
151. n by the Average switch PERIOD AVERAGING Period averaging is achieved by holding the main gate U386A on for 10 100 or 1000 periods This is accomplished by deflecting the A input through the averaging counters In the period averaging mode the LO state of PERIOD coupled through U371D Q459 U266B and U351A disables U290C and enables U360D The channel A signal is connected to the averag ing counters via U463A The operation of the averaging counters for the period mode is similar to the operation in the frequency mode sS Clock Signal DISPLAYED WAVEFORM SWITCHING Q303 9245 5 5300 8 Decade Counter AND GATE U amp 86C D 558 4 DISPLAY UPDATE HOLD B22 22 BUSY Fig 3 3 Signal flow for PERIOD mode 3 5 Circuit Description 7D15 TIM WIDTH Refer to Fig 3 4 for signal flow The signal at the A input is processed through the attenuators amplifiers shaper slope circuit and A Arm circuit This signal bypasses the Gate Generator via the Bypass Amplifier The signal also flips the Arm Gate Generator HI which in turn opens the Main Gate to allow the clock pulses to be counted TIM Refer to Fig 3 5 for signal flow The TIM A B mode in effect opens the Main Gate with a trigger from the A Input then closes the Main Gate with the a trigger from the B Input The procedure is as follows The A signal is processed through the attenuators amplifiers shaper
152. nd PA 17070 Escondido CA 92025 Dallas TX 75220 Indianapolis IN 46227 Waupun WI 53963 Clifton NJ 07014 Hartford CT 06101 Cambridge MA 02138 Cincinnati OH 45206 Hartford CT 06110 Danbury CT 06810 Chicago IL 60650 Elgin IL 60120 Milwaukee WI 53207 Beaverton OR 97077 La Grange IL 60525 Broadview IL 60153 Brookfield MA 01506 Philadelphia PA 19134 Statesville NC 28677 Irvington NJ 07111 Mamaroneck NY 10544 Fig amp Index No 1 1 2 3 6 7 8 9 10 11 12 13 14 16 17 18 19 20 21 22 23 24 25 26 27 32 33 34 35 36 38 39 41 Tektronix Serial Model Part No Eff 337 1064 04 366 1391 00 366 1077 00 213 0153 00 366 1146 01 213 0153 00 366 1408 00 213 0153 00 366 1257 97 366 1257 99 366 1257 98 426 0681 00 210 0583 00 210 0940 00 210 0046 00 366 1058 41 214 1095 00 333 1583 00 348 0235 00 105 0076 00 214 1280 00 214 1054 00 105 0075 00 358 0029 05 210 0590 00 210 0012 00 131 0955 00 131 1315 00 210 0255 00 260 1206 00 210 0583 00 210 0223 00 210 0940 00 XB124000 358 0464 00 260 0735 00 210 0008 00 XB124000 358 0378 00 131 0156 00 131 0372 00 352 0324 00 386 1447 65 213 0192 00 Op oD oe GEM 211 0156 00 Dscont FPUPRPNNNINKFP ENP IPR 2 PPP P F N P FPP lO N PE Peep gt Mechanical Parts Lis
153. ne Megahertz Standard or the EXT CLOCK IN The One Megahertz Standard signal is derived from the five megahertz crystal oscillator by way of the 5 block An external standard signal can be substituted by selec ting the EXT Position of the External Clock switch and by applying the external standard to the EXT CLOCK con nector The external clock signal is shaped for use with the rest of the clock circuitry The One Megahertz Standard is connected to a series of decade counters to provide the 14s 10 us 1 ms and 10 ms Clock signals 100 3 1 Circuit Description 7D15 megahertz Voltage Controlled Oscillator VCO and decade counter provides the 10 ns and 100 ns Clock signal The Voltage Controlled Oscillatoris stabilized with a phase locked loop circuit in which the 100 megahertz output is divided by 100 and compared with the One Megahertz Standard The frequency difference from the Phase Detector is a dc error voltage and is presented to the Voltage Controlled Oscillator to correct any drift After amplification and level selection the signals are shaped in the A and B Shapers The signals are then connected to the A Arm and B Arm circuitry by way ofthe Slope circuits This circuitry can with the proper com mand inhibit the signal from any further travel A LO or ground connection to the A ARM connector will inhibit the B signal while a HI command at the B ARM connector will inhibit the A signal These signals if no
154. nother in the unit 4 1 Maintenance 7D15 TROUBLESHOOTING EQUIPMENT The following equipment is useful for troubleshooting the 7D15 1 Semiconductor Tester Some means of testing the transistors and diodes used in this instrument is helpful A transistor curve tracer such as the Tektronix 576 will give the most complete information 2 DC Voltmeter and Ohmmeter A voltmeter for checking voltages within the circuit and an ohmmeter for checking resistors and diodes is required 3 Test Oscilloscope A test oscilloscope is required to view waveforms at different points in the circuit A Tektronix 7000 Series oscilloscope equipped with a readout system 7D13 Digital Multimeter unit 7B Series Time Base unit and a 7A Series Amplifier unit with a 10X probe will meet the needs of both items 2 and 3 4 Plug in Extender A fixture that permits operation of the unit outside of the plug in compartment for better accessibility during troubleshooting Order Tektronix Part No 067 0616 00 TROUBLESHOOTING PROCEDURE This troubleshooting procedure is arranged in an order which checks the simple trouble possibilities before pro ceeding with extensive troubleshooting NOTE A small portion of the 7D15 Main Interface board is inaccessible due to the location of the Power Supply board The Power Supply board however can be flipped up and out of the way Remove the Power Supply board turn it on end and plug it in using the three
155. o peak M 2 General Radio 1301B Sine Wave Generator Used for step 16 1 Tektronix TG 501 Time Mark Generator Range 10 ns marker 1 s Used for steps 11 and 13 marker accuracy 20 ppm amplitude at least 100 mV 2 Tektronix 2901 Time Mark Generator 3 Tektronix 184 Time Mark Generator RC Time constant 1 X 22 pF Used for step 5 1 Tektronix Part Number 067 0538 00 1 Tektronix Part Number 011 0049 01 Impedance 50 connectors Used throughout procedure BNC 1 Tektronix P6054A 10X Probe Used throughout procedure for signal connection to the Vertical Plug In Compatible with selected Ver tical Plug In Frequency Re sponse DC to 225 MHz 1 Tektronix Part Number 067 0616 00 Used throughout procedure For 7000 series plug ins 1 Tektronix Part Number 017 0078 00 Used for step 4 and when necessary for attenuation Impedance 50 connectors GR accuracy 2 1 Tektronix Part Number 017 0064 00 Connectors GR to BNC male Used throughout procedure Used for step 7 1 Tektronix Part Number 103 0030 00 Connectors BNC 1 Tektronix Part Number 012 0057 01 Used throughout procedure for signal connection Connectors BNC impedance 50 Q 1 Tektronix Part Number 017 0501 00 Used for step 12 and through out for signal connection D
156. proper triggering NOTE The CLOCK OUT signal may be used as the B Input signal to show operation The frequency of the CLOCK OUT signal is selected by the CLOCK switch i e with the CLOCK OUT signal connected to the Input the CLOCK switch set to 100 ns and the TIME switch set for a 1 second measurement interval the 7015 will read 10000 000 kHz 1000 ms Frequency Ratio Measurements 1 Apply one of the signals to be compared to the EXT CLOCK IN connector using one of the cables supplied with the 7D15 This signal is usually a standard to which the other signal is compared Move the internal Clock switch toward the rear of the plug in to the External clock position see Fig 2 12 2 Set the MODE switch to FREQ and the TIME AW ERG switch to X1 3 Connect the second signal the signal to be com pared to the B Input connector Adjust the B TRIGGER controls for proper triggering 4 The numerical readout located on the upper portion of the CRT indicates the ratio of the B Input signal to the EXT CLOCK IN signal 5 To obtain greater resolution the TIME AVERG switch can be used to divide the EXT CLOCK IN signal by 10 100 or 1000 However the decimal point for these switch positions will be incorrect To obtain the correct answer multiply the CRT readout by the correction factor given in Table 1 1 For example the CRT reads 10000 00 and the TIME AVERG switch is set to X10 The corrected readout is 10 00000 1
157. provides the necessary current for the digital integrated circuits Q980 is the series pass element Comparator 2984 0986 is referenced to 5 volts by divider R989 R990 The output of the power supply is fed into the comparator This increases or decreases Q986 collector voltage which varies the base and emitter of Q982 When the output of the power supply drifts negative the compartor senses it and causes the collector 0986 to move negative This in turn causes Q982 to turn Q980 off Excess current at this point is returned to the circuit through Q993 thus protecting Q980 and increasing the efficiency When the output drifts positive 0980 is turned back on Theoretical ly Q980 will be conducting one third of the time The output is filtered by C995 L996 and C996 VR995 ensures that the output will not raise above 6 2 volts C997 provides high frequency filtering Section 4 7D15 MAINTENANCE INTRODUCTION This section of the manual contains maintenance infor mation for use in preventive maintenance corrective maintenance and troubleshooting of the 7D15 Further maintenance information relating to general maintenance can be found in the instruction manuals for the 7000 Series oscilloscopes PREVENTIVE MAINTENANCE GENERAL Preventive maintenance consisting of cleaning visual inspection etc performed on a regular basis will improve the reliability of this instrument Periodic checks of the semiconductor devices
158. proximately 1 kHz rise time approximately 0 5 us amplitude 0 5 V to 12 V into 50 Q Pulse amplitude 0 5 V peak to Used for step 12 peak pulse rise time lt 1 ns Requires TM 500 series mainframe 5 2 Examples of Applicable Test Equipment 1 Tektronix 7904 Oscillo scope Mainframe 2 Tektronix 7704A or 7504 may be used if steps 13 and 14 are not checked 1 Tektronix 7A16A Ampli fier 1 Tektronix 7B50 Time Base Plug In 1 Tektronix DM 501 Digital Multimeter 2 Tektronix 7D13 Digital Multimeter 1 SG 503 1 Tektronix FG 501 Func tion Generator lt Sot 2 Tektronix 106 Squarewave Generator 1 Tektronix PG 502 Pulse Generator bob 2 Tektronix 106 Squarewave Generator Fast Rise port tion Description 8 Low Frequency Sine Wave Generator 9 NBSFS WWV Frequency Standard 10 Time Mark Generator ACCESSORIES 11 12 RC Normalizer Feed Through Termination 13 20 21 10X Probe Flexible Extender 10X Attenuator Adapter T Adapter 42 Inch Cable 2 10 ns Cable 5 ns Cable Short Circuit Termination Requires TM 500 series mainframe Calibration 7D15 TABLE 5 1 cont Examples of Applicable Minimum Specifications Test Equipment Frequency range 2 Hz to 20 2 Used for steps 8 and 9 1 Tektronix FG 501 Func amplitude 100 mV to 800 mV tion Generator peak t
159. pulse at pin 6 of U530B generates the DISPLAY via U421C and U266D The contents of the counters are stored encoded then read out on the crt FREQUENCY RATIO Refer to Fig 3 1 for signal flow An external time standard can be used for frequency measurements by setting the gate switch to OFF This replaces the 10 ms Frequency Standard with the signal connected to the A Input Frequency ratio measurements are made in this mode FREQUENCY RATIO The operation in the Frequency Ratio mode is the same as for the frequency measurements except the internal 10 millisecond stan dard is replaced by the signal connected to the EXT CLOCK connector Refer to the discussion of the clock circuitry Circuit Description 7D15 EVENTS Refer to Fig 3 2 for signal flow The front panel GATE switch is set to ON This opens the Main Gate and allows the signal to be counted Pressing the GATE switch to OFF closes the Main Gate and provides an initiate command to complete the cycle EVENTS In the events mode the signal to be counted is connected to channel B The signal to be counted is connected to the main gate U386A via U386B U360A and U390D The main gate is enabled by placing the GATE switch to ON This clears U374B and sets U374A This causes pins 12 and 13 of U386D to be LO pin 15 goes HI and the D input of U390 goes HI The signal to be counted clocks U390 pin 3 goes LO and U386A is enabled When the GATE switch is set to OFF the signa
160. put to the B ARM Q275 is forward biased Q277 is reversed biased and Pin 11 of U280 is LO enabling gates U287A and U295D 5 volts applied to B ARM will reverse bias Q275 forward bias Q277 and apply a HI to pin 11 of U280 With the arrival of the next clock pulse derived from the channel B input via Q285 pin 2 of U280 goes HI to disable gates U287A and U295D The polarity of the B ARM command can be reversed by moving the internal strap to connect U290D with the Q output of U280 pin 3 This mode of operation requires 0 5 volt at the B ARM connector to allow the signal to pass Removal of the 0 5 volt will inhibit the signal RESET CIRCUITRY The internally generated RESET and RESET pulses are generated at the end of the displayed time or by Ext Reset The function of the RESET and RESET pulses is to set the eight decade counters set the averaging counters provide a busy signal for external equipment and set then clear U409A to start a new measurement RESET and RESET pulses are generated as follows At the end of display time unijunction transistor 0258 will switch on momentarily A positive pulse is applied through C261 to reverse bias diode CR262 This momentarily removes the LO from the input of U264A which in turn applies a momentary LO at Pin 2 of U266A and a momentary on the RESET line A few nanoseconds later the transit time of U268D a momentary LO is presented to the RESET line The RESET line is connec
161. r a readout display of 0 200 s Reduce the frequency of the Low Frequency Sine Wave Generator to 2 Hz Press the 7015 RESET button and check for readout display of 0 000 s Set the 7D15 A COUPL switch to DC and check for a readout display of 0 500 s d Move the Low Frequency Sine Wave Generator output to the B FREQ input Set 7D15 MODE to FREQ and TIME to 15 8 Sele c SOv RCE Tapa I5 e Check for a readout display of 0 000 kHz Set 7D15 COUPL switch to DC and check for a readout of 0 002 kHz Change the Low Frequency Sine Wave Generator frequency to 5 Hz Change the 7D15 COUPL switch to AC and check for a readout of 0 005 kHz f Disconnect all test equipment NOTE Use the Vertical Plug In to set the amplitude of the Low Frequency Sine Wave Generator lt v9 EXTERNAL CLOCK CHECK a Connect 80 8 V peak to peak 20 Hz sine wave from the Low Frequency Sine Wave Generator to the 7D15 EXT CLOCK IN connector using one of the cables supplied with the 7D15 Calibration 7D15 b Connect the 7D15 CLOCK OUT to the Vertical Plug In using one of the cables supplied with the 7D15 and a 50 Feed Through Termination c Set the Vertical Plug In coupling to DC and sen sitivity to 5 V div Set the Oscilloscope Vertical Mode to left Set the 7015 INTERNAL EXTERNAL switch located on right side of plug in see Figure 5 1 to EXT Set the GATE switch to NORM and the CLOCK to 10 us e Check that the 20 Hz wavefor
162. re low during time slot 9 which turns 0896 and raises its collector up This causes 100 uA current drop across R897 subtracting it from the column output line Thus no current is available during time slot 9 and the character m is removed from the readout display Since 300 of row current is being supplied during time slot 9 and total of 900 of current is needed to add a space in the display the character s moves over next to the character O The characters for the CLOCK switch S699 positions in conjunction with TIME switch 5599 are developed similar pattern and produce the various symbols and combinations of symbols as illustrated in Fig 3 7 A diode matrix provides time slot information to the A B C and D inputs of Digital Analog converters U890 and U898 in BCD code but displaced by a count of one Time slot 2 pulls down on A input TS3 on B input T54 on both A and B inputs This results in a BCD count of 1 2 and 3 rather than 2 3 and 4 Time slot 1 doesn t enter the IC but this information is produced when A B C and D inputs become high Normally this would produce a 0 count However the displacement of 1 pattern causes thisto bea count of 1 During this time the internal resistors are all interrogated depending on what word is selected at the input and provides the proper row and column current for the display information OVERFLOW When an overflow condition occurs aHl appears at
163. s it registers one count and sometimes two counts depending on the timing between the clock and the repetition rate of the interval to be measured Assuming a uniform random distribution of timing coincidence two counts are recorded 10 of the time and one count 90 of the time Figure 2 8 shows the graphical representation of this example While time interval averaging reduces inaccuracies the amount is often difficult to determine The period of the interval to be measured is one variable in calculating the TOTAL NOMINAL COUNT 1100 EXAMPLE ASSUMES UNIFORM RANDOM DISTRIBUTION OF TIMING COINCIDENCE 133334 Fig 2 7 Graphical representation of time interval averaging standard deviation A probability distribution graph for the previous example where the time interval is 11 ns is shown in Figure 2 9 Compare this graph with the probability distribution graphs for 10 1 ns and 15 ns The probability range for a time interval of 10 1 ns is narrower than for a time interval of 11 ns or 15 ns Readings in the shaded area of the graph represent the range of answers that may be given 50 of the time Another variable that can change the shape of the distribution curve is the number of averages taken The graphs shown in Figure 2 10 represent the probability curve of an 11 ns time interval that is averaged 10 100 and 1000 times The graphs show that the probability of obtaining an answer of exactly 11 ns increases with the number o
164. s of Operation Operation and Checkout CIRCUIT DESCRIPTION Introduction Block Diagram Description General Input Clock Gate Counters and Readout Reset Trigger Input Amplifiers Time Base Arm inputs Reset Circuitry Readout Theory General CH 1 Column and Row Data CH 2 Column and Row Data Overflow 5 V Supply MAINTENANCE Introduction Preventive Maintenance Troubleshooting Corrective Maintenance Component Replacement Recalibration After Repair CALIBRATION Introduction Test Equipment Required Calibration Procedure Index to Calibration Procedure ELECTRICAL PARTS LIST Abbreviations and Symbols DIAGRAMS AND CIRCUIT BOARD ILLUSTRATIONS Symbols and Reference Designators MECHANICAL PARTS LIST CHANGE INFORMATION 3 1 3 1 3 1 3 1 3 1 3 2 3 7 3 8 3 8 3 9 3 9 3 10 3 10 3 10 3 12 3 13 3 14 4 1 4 1 4 1 4 3 4 4 4 4 5 1 5 1 5 4 7 15 7D15 MODE TIME AVERG CLOCK PERIDD 0 38 xi 2 WIDTH A 1000s PI fd ad A Tus sg 0 FREO B ilas UE EXT CLOCK IN CLOCK QUT ims 2 aen o D 5 fa TRIGGER 5 97 A B P s ui i renim ha ig n P A oF n STS See momen quem rmm m mom mare frm E is RS UB ER CR eT RET QUT INPUT A 22 25 z j reir r i SOURCE cour ws ui gt INPUT T MM rat T ggf s TR
165. s684 9649 J 0220 G uM 226299 i i 7 3 re em J gp lt r a OB E 664 M RE 3818 reru co B i E T dd 7 pe hme ce EE 06 qe 16 1 COLUMN C Pu 90642 2 s ER SEN bM CAN 9899 CHA OS m CE 0 hema 08 14884 100 906H2 1899 SRP eai MS xp 0689 Len c Cole eri 2o 0 2 c 3 8 gx 649 AA sss ah T vi en 606H2 at 7 E 8 00082 DEG 9 9 E c 204 re 3 2 S 1 i Q gt ES E EET M cs 1 0998 Sloe us eee latoj A 59 008912 H row z i fpu e ku m T 4 w ra m 5 09697 T9 6 SYED TS o P 24 a mum Soares VR gt u pie e Se TRO MT Tl Y y PW Oen an ek av 0100 soos BENE ENE n n nn n _ cC 1 0100 20046 2 CEPT Tey a F O a eee d Gy h LIL LILL gt 22222 Tr
166. sition The attenuators are hybrid devices that furnish the appropriate attenuation and compensa tion Each attenuator is replaceable as a unit The trigger source position of S11 and 111 dis connects the A or B signal and connects the internal trigger signal INTERNAL TRIGGER The 7D15 has access to the oscilloscope trigger signal when plugged into an oscilloscope horizontal plug in compartment This differential trigger signal is connected to differential amplifier Q203 Q213 via pins A20 and B20 of the Mainframe connector see Diagram 1 Q203 and Q213 form a paraphase amplifier The base of Q217 a single ended amplifier is driven by Q203 the emitter of Q217 is driven by 0213 CR203 provides the offset necessary for proper operation of Q217 The output of 217 is ac coupled through C219 to provide inputs to the A and B Amplifiers A AMPLIFIER The input signal is connected to the AC Amplifier which consists of Q25 Q32 and Q38 and the DC Amplifier consisting of 043 R17 provides the one megohm input resistance R18 is acurrent limiting resistor and C18 provides ac bypass CR20 CR21 CR22 and CR23 provide overvoltage protection for the amplifiers Q25 source follower is ac coupled through C27 into amplifier Q32 and the low output impedance amplifier Q38 R31 provides the high frequency gain adjustment for Q32 VR36 provides the 12 volt supply for Q32 and Q38 The output of the AC Amplifier is ac coupled into Schmitt Trigger
167. splay is triggered with the PSEUDO GATE To present a usable display the 7D15 clock rate is changed to 10 us A drift of 1 5 seconds per cycle is noted This drift rate is corrected by 10 ns 10 X 1 5 seconds 1 5 ms Since Treas 10 ms is greater than the drift rate 1 5 ms synchronization is not a problem To eliminate a synchronous relationship change the input signal repetition rate introduce some type of phase instability to the input signal or alter the 7D15 clock frequency two or three ppm is usually adequate Any of these methods allow the counter to seek a true random distribution of time coincidence Selective Time Interval Measurements Selective time interval measurements are made possible by using the 7D15 A ARM and B ARM gates The oscilloscope delayed gate can be used in conjunction with the ARM gates to choose the portion of a waveform to be measured Refer to the oscilloscope and time base manuals for complete information concerning gate outputs available OPERATION AND CHECKOUT Introduction These procedures demonstrate the use of the connectors and controls of the 7D15 and also provide a means of checking the basic operation of the instrument Preliminary Setup Instali the 7015 into a vertical compartment of any 7000 Series readout equipped oscilloscope Set the oscillo scope Vertical Mode and Trigger Source switches to the proper settings Install a 7B Series time base unit into a
168. t 7D15 FIGURE 1 EXPLODED 123465 amp Description SHIELD ELEC SIDE KNOB GRAY W SETSCREW KNOB GRAY W SETSCREW KNOB INCLUDES SETSCREW 5 40 X 0 125 INCH HEX SOC STL KNOB GRAY WITH SETSCREW EACH KNOB INCLUDES SETSCREW 5 40 X 0 125 INCH HEX SOC STL KNOB GRAY WITH SETSCREW EACH KNOB INCLUDES SETSCREW 5 40 X 0 125 INCH HEX SOC STL PUSH BUTTON GRAY SLOPE PUSH BUTTON GRAY COUPL AC PUSH BUTTON GRAY SOURCE INPUT B FR PUSH BUTTON GRAY PLASTIC RESISTOR VAR SEE 256 5256 EPL ATTACHING PARTS NUT PLAIN HEX 0 25 32 X 0 312 INCH BRS WASHER FLAT 0 25 ID X 0 375 INCH OD STL WASHER LOCK INTL 0 26 ID X 0 40 OD STL m A KNOB LATCH 7D15 ATTACHING PARTS PIN SPG SPLIT 0 094 OD X 0 187 INCH LONG a ao Rw wm PANEL FRONT 7D15 SHLD GSKT ELEC 4 734 INCH LONG REL BAR LATCH PLUG IN UNIT SPRING HLCPS 0 14 OD X 1 126 L 0 16 DIA W SPRING DETENT LATCH PAWL 0 475 0 21 X 0 184 INCH PLSTC BSHG MACH THD 0 274 ID 0 438 L NP BRS ATTACHING PARTS FOR EACH NUT PLAIN HEX 0 375 X 0 438 INCH STL WASHER LOCK INTL 0 375 ID X 0 50 OD STL w CONNECTOR RCPT BNC FEMALE CONNECTOR RCPT BNC FEMALE ATTACHING PARTS TERMINAL LUG 0 391 ID INT TOOTH er SWITCH TOGGLE SPDT 5A 115VAC CENTER OFF ATTACHING PARTS NUT PLAIN HEX 0 25 32 X 0 312 INCH BRS TERMINAL LUG 0 25 INCH DIA SE WASHER FLAT 0 25 ID X 0 375 INCH OD STL BUSHING SLEEVE 0 257 0 312
169. t inhibited are connected to the gating circuitry 9666090 Channel B Signal ex am Averaging Signal Path GATE For simplicity the Gate block is discussed in each mode of operation A block diagram showing the main signal flow is given for each mode FREQUENCY MODE Refer to Fig 3 1 for signal flow The frequency to be measured is connected to the B input through the B circuitry then to the main gate The 10 ms Frequency Standard is connected through the A Arm circuit to the Gate Generator and the Arm Gate Generator The 10 ms pulse sets the Arm Gate Generator and the Gate Generator HI This enables the AND gate and opens the Main Gate Opening the Main Gate allows the B signal to be counted The next 10 ms pulse sets the Arm Gate Generator LO which causes the AND Gate to go LO turning the Main Gate off A LO at the output at the AND DISPLAYED WAVEFORM SWITCHING B ARM e 10ms Clock or Reference Signal 4175 U28575 0277 3 0285 280 PULSE GENERATOR U287A From Slope Switch 777 U2G SC 03609 BY PASS AMPLIFIER IOTHA 2 UZIOA Ome From A Slope Switch Frequency Ratio Mode A ARM amp SWITCHING 4454 1668 99719 KN D GATE d mue cu og uw me E GENERATOR 8 amp TIM ix ds F el FREQ US5IA PERIOD 0450 Q509 Q512 U52 4529 5 U4e3 0484 94 6 8 5544 U499A B AV
170. te 5 nanoseconds effect of ARM Minimum rise and fall rate dv dt 3 10 Volts per microsecond Sensitivity A ARM A logical 1 occurs with either no signal applied or with 0 5 volt or greater A logical 0 occurs with less than 0 2 volt sink lt 0 2 milliampere B ARM Logic 1 lt 0 2 volt or no signal applied Logic 0 2 0 5 volt Maximum Operating Voltage 10 volts to 5 volts External Clock In Input Requirements Internal switch selectable 0 8 volt peak to peak sine wave or pulse with 3096 to 7096 duty cycle Minimum Amplitude 1 3 Specifications 7D 15 Characteristics Maximum Input Voltage Frequency Range RESET Front Panel Input R and C Input Requirements Amplitude Pulse Width Maximum Operating Input Voltage Rise and Falltime Maximum Input Voltage Reset located on Rear Interface B13 Rise and Falltime Width Hold Signal located on Rear Interface B22 Rise and Falltime Propagation Delay for Signal to become effective or ineffective 14 TABLE 1 1 cont Performance Requirements 50 volts DC 20 volts peak to peak 1 megahertz 5 Phase Lock Opera tional 10 nanoseconds 100 nanoseconds clock available 20 hertz to 5 megahertz Phase Lock Nonoperational Reset initializes the instrument All counters are affected including averaging circuits Approximately 10 kilohms 30 picofarads Logic 1
171. ted to the set inputs of counters U401 U409B U413A and U413B The RESET line is also connected to pins 1 and 2 of U289A If the instrument is not in the Period mode pin 12 of U489A will go LO and 8 of U489C will go momentarily This sets or clears the averaging counters U519 U521 U496A U496B U499A and U499B U409A is also set The RESET which occurs a few 3 9 Circuit Description 7D15 nanoseconds after RESET is delayed even longer through U264B and U530C The delayed RESET pulse is then differentiated by C532 and LR532 and used to clear U409A U409A was just set by the RESET pulse The RESET line is also connected to U264D which provides a LO to pin 1 of U421A and a HI to the busy line Complete resetting of the entire instrument including the display is initiated by the EXT RESET line The EXT RESET command is generated by applying a HI to the front panel RESET connector pressing the RESET pushbutton switching the gate switch to NORM or by a command through the rear interface connector B15 The EXT RESET command generates a RESET and RESET pulse via U266A The EXT RESET is also connected to pin 10 of U421C The EXT RESET command causes pin 8 of U421C to go HI and if there is no external hold command connected to B22 of the rear interface connector the display line will go LO thus resetting the display readout EXT RESET also connects to pin 5 of U351B where it clears U374A and presets U374B
172. tion 1 Instrument Type 2 Instrument Serial Number 3 A description of the part if electrical include circuit number 4 Tektronix Part Number SOLDERING TECHNIQUES Disconnect the instrument from the power source before soldering CIRCUIT BOARDS The components mounted on the circuit boards in the 7D15 can be replaced using normal circuit board soldering techniques Keep the following points in mind when soldering on the circuit board 1 Use a pencil type soldering iron with a wattage rating from 15 to 50 watts 2 Apply heat from the soldering iron to the junction between the component and the circuit board 3 Heat shunt the lead to the component by means of a pair of long nose pliers 4 Avoid excessive heating of the junction with the circuit board as this could separate the circuit board wiring from the base material 5 Use electronic grade 60 40 tin lead solder 6 Clip off any excess lead length extending beyond the circuit board Clean off any residual flux with a flux removing solvent 4 3 Maintenance 7D15 METAL TERMINALS When soldering metal terminals potentiometers etc use 60 40 tin lead solder and a 15 to 50 watt soldering iron Observe the following precautions when soldering metal terminals 1 Apply only enough heat to make the solder flow freely 2 Apply only enough solder to form a solid connection Excess solder may impair the funciton of the part 3 If a wire extends
173. umn carefully to see if any other equip ment is available which might suffice Then check the Usage column to see what this item of test equipment is used for If used for a check or adjustment that is of little or no importance to your measurement requirements the item and corresponding step s can be deleted Calibration 7D15 Description 1 Oscilloscope 2 Vertical Plug In Unit 3 Time Base Plug In 4 Digital Voltmeter DVM 5 Sine Wave Generator 6 Square Wave A Generator T Pulse Generator TABLE 5 1 REQUIRED TEST EQUIPMENT Minimum Specifications Tektronix 7000 series main Used throughout procedure frame with four plug in compart Ito provide power readout ments Minimum system band and display width vertical plug in plus main frame 225 MHz Tektronix 7A series plug in unit Minimum sensitivity 5 mV div system bandwidth 225 MHz Used throughout procedure to provide vertical display Used throughout procedure to provide sweep Tektronix 7B series plug in unit Fastest sweep rate 0 1 us div Range 0 V to 3 V accuracy Used for steps 1 and 10 3 596 resolution digits Used for steps 2 6 12 13 14 and 15 Frequency range 3 MHz and 70 MHz to 225 MHz peak to peak amplitude 0 5 V to 4 V into 50 Used for steps 3 4 5 Repetition rate ap
174. x 7000 Series Oscilloscopes however if a displayed waveform is desired it should be used in one of the vertical compartments Mainframe triggers are furnished the 7015 when installed in a horizontal compartment To install align the upper and lower rails of the 7D15 with the oscilloscope tracks and slide it in The front panel will be flush with the front of the oscilloscope and the latch at the bottom left corner will be in place against the front panel when the 7D15 is fully installed To remove pull on the latch inscribed with the unit identification 7015 and the 7D15 will unlatch Continue pulling to slide the 7D 15 out of the oscilloscope Section 2 7D15 2 1 Operating Instructions 7D 15 2 A TRIGGER La 7015 5 ee N FRONT PANEL CONTROLS AND CONNECTORS E Tien INE ATE B DISPLAY TIME OFF NORM ON m Spe E MODE TIME AVERG CLOCK DE 10 m faa x mi A EX fes Vines xu ag 11 in Tus wj fud FREU B us 10s ig xt000 11 EXT CLOCK IN CLOCK OUT RS en ee dee eee mrt ap eh DAN BUT BC GUT INPUT A our ee Qur SLOPE SOURCE couPi T sunt 1 AC INPUT B AC rss an i We v LEVEL gent print

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