Home

Tektronix Pill Reminder Device DC 504 User's Manual

1. SIGNAL SG 503 AMPLITUDE DCs04 FREQUENCY Peak to Peak DISPLAY 15 MHz 56 mV 15 000 50 MHz 99 mV 50000 80 MHz 495 mV 80 000 NOTE When the three digit accuracy of the SG 503 is expanded to five digits on the DC 504 the display rounding process in the SG 503 becomes apparent i Remove the SG 503 Output from DC 504 INPUT Specification and Performance Check DC 504 9 Check Period a Set the following controls DC 504 DISPLAY TIME FUNCTION PERIOD SEC 10 ms RESOLUTION TRIGGER LEVEL Midrange SOURCE EXT All internal switches Down TG 501 Variable Timing IN Marker Sec 1s b Connect the TG 501 Marker Output to DC 504 INPUT through a coaxial cable and a 50 ohm terminator The terminator must be placed at the DC 504 end of the cable c Adjust the DC 504 TRIGGER LEVEL as necessary for a display d CHECK Period measurement function using the following table NOTE 1 Disregard least significant digit or 1 count 2 If a different generator is used for checking the period mode its signal to noise must be high enough to ensure adequate triggering and it must be free of aberrations and ringing with amplitudes larger than 50 mV peak to peak TG 501 DC 504 DC 504 MARKER SEC FUNCTION DISPLAY 1s 10ms 100 13 ims 1 000 1s ms 1 0000 As 108 100 00 10 ms L 1us 10 000 e Remove the TG 501 Marker Output from DC 504 INPUT T
2. Characteristics Performance Requirements Supplemental Information Temperature Operating 0 C to 50 Storage 40 C to 75 C Altitude Operating To 15 000 feet Storage To 50 000 feet Vibration Operating and Non operating With the instrument complete and operating vibration frequency swept from 10 to 50 to 10 Hz at 1 minute per sweep Vibrate 15 minutes in each of the three major axes at 0 015 total dis placement Hold 3 minutes at any major resonance or if none at 50 Hz Total time 54 minutes Shock Operating and Non operating 30 g s 1 2 sine 11 ms duration 2 shocks in each direction along 3 major axes for a total of 12 shocks REV C JAN 1977 23 Specification and Performance Check DC 504 PERFORMANCE CHECK INTRODUCTION This procedure checks the electrical characteristics of the DC 504 that appear in the Specification section of this manual If the instrument fails to meet the requirements given in the performance check the Adjustment pro cedure should be performed This procedure can also be used by an incoming inspection facility to determine acceptability of performance The electrical characteristics in this manual are valid only if the DC 504 is calibrated at an ambient temperature of 20 C to 30 C and operated at an ambient temperature of 0 C to 50 C Tolerances that are specified in this performance check procedure apply to the instrument under
3. O95 R360 u35 2 2 F3 0198 13 inis 8381 5 Fe Us20 E5 Coss 9200 1 R362 Us25 06 Cos F1 0209 3 363 U400 5 Cao 2 920 25 9365 C310 2 9235 151 366 9240 KS RO 9140 J5 e325 9245 4 6 A371 E6 16 9247 375 VRa30 Bs Cao 5 9260 2 8400 5 5 9264 842 vo m c5 0900 lt 2 44 C420 9310 C2 405 9350 G5 Raro ao 5 1 C425 9355 G5 125 Ra25 5 Cass 090 GE 4 C10 9365 828 laze Bs RIO IB crios 9370 5 81 9425 85 820 15 8 048 222 15 8450 R240 5 vm 8 CR210 13 100 5 2243 5102 16 10 K8 CR212 R102 5160 CR220 9106 16 8247 5190 CR225 H1 R108 16 R250 200 CR226 Hi R110 16 R252 64 210 CR235 15 8145 5 m255 H2 235 15 CR240 5 116 KS R257 12 5245 CR245 Je R260 12 CR246 R120 46 R262 12 0160 12 CR247 16 R264 9180 12 CR255 R127 16 R268 5 U210 J2 CR257 R
4. BOX 3608 7100 LAMPSON AVE RICHARDS AVENUE YOUK EXPRESSWAY 16931 MILLIKEN AVE 446 MORGAN ST 57 CHARLES ROAD 900 INDUSTRIAL RD 47 16 AUSTEL PLACE 2100 S O BAY ST P O BOX 500 2530 CRESCENT DR 149 EMERALD ST P O BOX 1360 172 STERLING STREET 600 18TH AVE BEAVERTON OR 97005 HARRISBURG PA 17105 GARDEN GROVE CA 92642 NORWALK CT 06852 LOS GATOS CA 95030 NEW CUMBERLAND PA 17070 CAMPBELLSVILLE IRVINE CA 92713 CINCINNATI OH 45206 ELGIN IL 60120 42718 SAN CARLOS 94070 LONG ISLAND CITY NY 11101 MILWAUKEE WI 53207 BEAVERTON OR 97077 BROADVIEW IL 60153 KEENE NH 03431 STATESVILLE NC 28677 CLINTON MA 01510 ROCKFORD IL 61101 REV DEC 1984 Replaceable Mechanical Parts DC 504 Fig amp index Tektronix Serial Model No Part 12345 Name amp Code Part Number 1 337 1399 00 2 SHLD ELECTRICAL SIDE 80009 337 1399 00 2 366 0494 00 3 KNOB GRAY WITH SETSCREW 80009 366 0494 00 213 0153 00 1 SETSCREW 5 40 X 0 125 STL BK BY DESCR 3 366 1031 05 3 KNOB RED CAL 80009 _ 366 1031 05 213 0153 00 3 SETSCREW 5 40 X 0 125 STL BK OXD HEX BY DESCR E 366 1170 01 1 KNOB GRAY 4 SIDED 80009 366 1170 01 213 0153 00 2 SETSCREW S 40 X 0 125 STL OXD HEX BY DESCR 5 366 1257 30 3 PUSH BUTTON GRAY RESET 80009 366 1257 30
5. POLYTHN JKT 90484 DAB70JAAAWHITE 58 1 BOARD ASSY TIME REPL 59 213 0206 00 2 SCR TPG THD FOR 6 32 X 1 25 INCH PNH STL 86113 ORD BY DESCR 60 361 0682 00 2 SPACER SLEEVE 0 648 X 0 189 BRS 80009 361 0682 00 51 210 0006 00 2 SHER LOCK 6 INTL 0 018 THK STL CO PL 78189 1206 00 00 0541 END ATTACHING PARTS 8 4 REV DEC 1984 Replaceable Mechanical Parts DC 504 Fig amp index Tektronix Senal Model No Mfr No Part No Dscont 12345 amp Descnption Code _ Mir Part Number 1 CKT BOARD ASSY INCLUDES 62 131 0566 00 1 BUS CONDUCTOR DUMMY 5 2 375 22 AWG 57668 JWW 0200E0 63 136 0269 02 8010100 8041419 1 SKT PL IN ELEK MICROCIRCUIT 14 DIP 09922 DILB149P 108 64 1 OSCILLATOR SEE A3Y10 REPL 65 210 1014 00 4 WASHER NONMETAL 0 094 ID X 0 312 OO TEFL 80009 210 1014 00 REV DEC 1984 OPTION 1 DC 504 COUNTER TIMER REV B JAN 1977 ACCESSORIES Fig amp Index Tektronix Serial Model No Mtr No PartNo Dscont Qty 12345 Name amp Description Code Mfr Part Number 070 1670 01 1 TECH INSTRUCTION 80009 070 1670 01 REV C JAN 1977 DC 504 COUNTER TIMER
6. LON Go OPTIONBD 0059 4 WER READOUT BD D O rz 12 82 y ety 21 z ki og je jet s 91 Jet zu 1670 12 REV E MAR 1980 See Parts List for serial number ranges Located on back of board NOTE R100 relocated on 5100 GRID CKT GRID GRID CKT GRID CKT GRID NO toc NO LOC N N DS250 Ds Ri40 R315 05 4260 05350 E7 Ri44 15 05 U265 B4 16 DS355 Ri46 15 R317 05 U270 Ks 0530 8150 15 R318 05 U272 E4 05385 R152 25 R322 Uzi4 Ci21 5 DS370 Ri54 R325 4276 C128 06376 Ri60 R330 FS 0278 E4 Ries 12 R331 F5 04 C167 2 L340 HS 12 R332 F5 U282 CHO R170 M2 R333 G5 0 4 172 910 KS Rs 334 F5 02860 014 46 R176 M3 R335 05 U28 2 C205 919 45 R336 05 4290 2 C235 15 9134 5 R340 1292 02 9140 J5 Rigo K2 R350 0294 Fi c 050 55 8351 Ge 296 1 C255 H2 9180 K2 R182 R355 0298 DI Q5 858 0310
7. 2 05375 352 P350 8256 TL fs 5 U260A 525 lt esy 3 5V were 8210 Sese pee 375 P317 CLEAR NORM sn o 7412 i 278 DECIMAL Rpm 9 POINT OUT 06504 REN E JUN 1879 COUNTER DISPLAY 1670 17 28 lt B 4 99k 5 LOCATED Mi e MAINFRAME 2x gt 5 VOLTS RAOS 0 3 5 vots Q 12 5 VOLTS MAINFRAME 33 5V gt 5200 4 2 3 4 5 6 7 B i 12 Resolution COW g m x g SWITCH DETENT e g s G e 10 He FREQUENCY m g je Hz kHz D o 1 H NOTE CAM NUMBER 1 CLOSES e E BETWEEN EACH DETENT IK 3 TO RESET TOTALIZE EVENTS A m g H ms sec g e PERIOD 01 5 4 e e OF 155 REV JUN 1979 00504 POWER SUPPLY SWITCH DETAILS Z Section 8 504 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 y
8. 6 366 1422 00 8010100 8033829 1 KNOB LATCH 80009 _ 366 1422 00 366 1690 00 8033830 1 KNOB SIL GY 0 53 X 023 X 1 059 80009 366 1690 00 eren ATTACHING PARTS 7 214 1840 00 8010100 B033829 1 SECRG 0 094 OD X 0 120 INCH LONG 80009 214 1840 00 eere END ATTACHING PARTS 8 426 0681 00 1 FR PUSH BUTTON 80009 426 0681 00 E 131 0955 00 3 CONNRCPT ELEC BNC FEMALE 13511 31279 ATTACHING PARTS 210 0255 00 1 TERMINAL LUG 0 381 ID LOCKING BRS CD PL 80009 210025500 1 1 ATTACHING PARTS 2 210 0583 00 1 NUT PLAIN HEX 0 25 32 X 0 312 INCH BRS 73743 2X20317 402 E 210 0940 00 1 WASHER FLAT 0 25 ID X 0 375 INCH 00 57 79807 BY DESCR END ATTACHING PARTS 358 0029 00 10 BSHG MACH THD HEX 0 375 32 X 0 438 LONG 80009 358002900 ATTACHING PARTS 15 210 0590 00 3 NUT PLAINHEX 0 375 32 X 0 438 BRS 73743 2X28269 402 16 210 0978 00 1 WASHER FLAT 0 375 ID X 0 50 INCH OD STL 78471 BY DESCR END ATTACHING PARTS R a 1 CKT BOARD ASSY DISPLAY SEE A2 REPL ATTACHING PARTS 18 210 0405 00 2 NUT PLAINHEX 2 56 X 0 188 BRS CD PL 73743 12157 50 210 0001 00 2 WASHER LOCK 2 INTLO 013 X 0 18 00 57 78189 1202 00 00 0541C 20 211 0159 00 8 010100 80328588 2 SCREW MACHINE 2 56 X 0 375 INCH PNH STL 87308 BY DESCR 211 0034 00 8032860 2 SCREW MACHINE 2 56 X 0 50 INCH PNH 83385 BY DESCR 361 0019 00 8032860 2 INSULATOR DISK 0 094 DIA X 0 078 INCH L 80009 36100190
9. FUNCTION switch is placed in the TOTALIZE EVENTS position While the LATCH signal is high the logic levels from the decade dividers are read into the storage register The outputs of the latches are connected to gates U298 U292 U286 U280 U274 that are controlled by the time slot decoder The gates place the bcd information sequentially on lines running to the seven segment decoder and on the bcd output pins of the plug in connector Overflow Register When the decade counters have counted 99 999 the counters are full At the next count the falling edge at the 2 output of U270 pin 11 is inverted by U220A and used as a clock signal for U260A When the clock causes U260A to toggle pin 6 will go low The nextlatch pulse will cause pin 6 of U265 which is connected as a bistable multivibrator RS latch to go low causing the front panel OVERFLOW light emitting diode LED to light Pin 11 of U265 goes high when pin 6 goes low to prevent the leading zero suppression during the overflow condition The OVERFLOW LED will stay on until the next LATCH signal occurs at which time the magnitude of the count is again assessed Scan Clock The scan clock determines the scanning rate of the time slot decoder The scan clock is a free running astable multivibrator consisting of Q300 and Q310 which runs at approximately a 3 5 kHz rate 5 3 Circuit Description DC 504 Time Slot Decoder The time slot decoder consists of shift regis
10. If the waveform moves to the right it indicates the time base frequency is less than 1 MHz if it moves to the left the frequency is greaterthan 1 MHz The period in seconds forthe waveform to move the width of one cycle is equal to the frequency difference in parts in 10 For 32 example if the waveform drifts to the right at a rate of one cycle every 10 seconds the time base frequency is 0 1 part in 10 low Maximum allowable frequency difference is 1 part in 10 c Adjust C172 for no observable drift opening the plates of C172 increases the oscillator frequency closing them decreases the frequency This concludes the Adjustment Procedure Fig 3 2 Test setup for Time Base frequency check GENERAL The Power Module instruction manual contains the general maintenance procedures to be followed in main taining the TM 500 Series plug ins This manual contains specific procedures for things not covered in the Power Module manuals CLEANING THE CHASSIS The instrument should be cleaned by first loosening dust and other foreign matter with a small paint brush then using a vacuum cleaner to remove the loosened material Hardened on dirt can be removed with water and a mild detergent solution Isopropyl alcohol is also permitted as a cleaning agent Do not use any other cleaning solutions or solvents REV C JAN 1977 Section 4 DC 504 MAINTENANCE CLEANING SWITCH CONTACTS Use alcohol for c
11. P 372 INDIANAPOLIS IN 46206 91637 DALE ELECTRONICS INC P O BOX 609 COLUMBUS NE 68601 96733 SAN FERNANDO ELECTRIC MFG CO 1501 FIRST ST SAN FERNANDO CA 91341 REV DEC 1984 Replaceable Electrical Parts DC 504 Tektronix Serial Model No Mir Ef 8 Name amp Descipion MfrP rtNumber 672042401 010100 801015 BOARD ASSY FUNCTION SWITCH 80009 672 0424 01 672 0424 00 8 010157 8032859 BOARD ASSY FUNCTION SWITCH 80009 672 0424 00 AT 672 0424 02 8032860 8032869 BOARD ASSY FUNCTION SWITCH 80009 6720424402 672 0424 03 8032870 CKT BOARD ASSY FUNCTION SWITCH 80009 672 0424 03 A2 670 313300 8010100 8010156 CKT BOARD ASSY DISPLAY 80009 670 3133 00 A2 670 3133 01 8010157 B032859 CKT BOARD ASSY DISPLAY 80009 670 3133 01 A2 670 3133 02 8032860 CKT BOARD ASSY DISPLAY 80009 670 3133 02 670 3602 00 CKT BOARD ASSY TIME BASE 80009 670 3602 00 A3 OPTION 01 ONLY 283 0204 00 CAP FXD CER 01 0 010 20 50 96733 R2676 OPTION 01 ONLY C102 283 0008 00 CAP FXD CER DI 0 1UF 20 500V 56289 3C37X7R104M5008 C104 281 0503 00 B010100 8032869 01 8 0 5 500 59660 0301 080 80 C104 281 0592 00 B032870 CAP FXD CER 01 4 7 0 5PF 500V 59660 0301080COH0479 D C106 281 0519 00 CAP FXD CER DI 47PF 4 7PF 500V 59660 308 000C0G0470K 281 0629 00 CAP FXD CER DI 33PF 5 600V 042
12. is a gated series of pulses from the gate generator pulses are at either the front panel input frequency for frequency measurements or are from the time base for period measurements Circuit Description DC 504 The 10 through 10 DCU is composed of five cascaded divide by ten counters The first decade counter is a specially selected decade divider that can operate at the maximum frequency capability of the DC 504 When the CLEAR signal to pin 13 of U294 is high U288 U282 U276 and U270 require a low signal on CLEAR the counter is enabled The input signal is applied to the clock input pin 8 of U294 On every tenth clock input counted by the first decade counter the output of U294 goes low providing a carry signal that becomes the clock input for the second decade counter Each subsequent decade divides by ten in a similar manner Four bcd output lines are connected from each DCU to its associated storage register latch When the CLEAR signal is activated all of the decade counters are reset to the zero count state Storage Register and Gates The Storage Register comprises latches U296 U290 U284 U278 U272 it stores the corresponding decade counter bcd output The bcd output number is applied to the data inputs at pins 2 6 7 and 3 2 2 2 and 2 bits respectively The LATCH signal is applied to the clock input at pins 4 and 13 of each latch at the end of GATE negative transition on pin 9 of U220 or when the
13. the U S Federal Cataloging Handbook H6 1 can be utilized where possible ABBREVIATIONS ACTR ACTUATOR PLSTC PLASTIC ASSY ASSEMBLY orz 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 INCAND INCANDESCENT ww WIREWOUND LEO LIGHT EMITTING DIODE TRANSFORMER NONWIR WIREWOUND XTAL CRYSTAL 6 1 Replaceable Electrical Parts DC 504 CROSS INDEX MFR CODE NUMBER TO MANUFACTURER Mir Code Manufacturer City S 00136 MC COY ELECTRONICS COMPANY WATTS AND CHESTNUT STR MT HOLLY SPRINGS PA 17065 01121 ALLEN BRADLEY COMPANY 1201 2ND STREET SOUTH MILWAUKEE WI 53204 01295 TEXAS INSTRUMENTS INC SEMICONDUCTOR GROUP BOX 5012 DALLAS TX 75222 04222 AVX CERAMICS DIVISION OF AVX CORP P O BOX 867 MYRTLE BEACH SC 29577 04713 MOTOROLA INC SEMICONDUCTOR PROD Div 5005 E MCDOWELL RD PO BOX 20923 PHOENIX AZ 85036 07263 FAIRCHILD SEMICONDUCTOR A OF FAIRCHILD CAMERA AND INSTRUMENT CORP 464 ELLIS STREET MOUNTAIN VIEW CA 94042 12969 UNITRODE CORPORATION 580 PLEASANT STREET WATERTOWN MA 02172 13511 AMPHENOL CARDRE DIV BUNKER RAMO CORP LOS GATOS 95030 14433 ITT SEMICONDUCTORS 3301 ELECTRONICS WAY P O BOX 3049 WEST PALM BEACH FL 33402 14552 MICRO SEMICONDUCTOR CORP 2830 E FAIRVIEW ST SANTA ANA CA 92704 16546 GLOBE UNION INC
14. tion is to accumulate a count of relatively slow and irregular events Starting the Count Apply the signal to the INPUT connector and set the trigger controls the same as for frequency measurement Adjust the TRIGGER LEVEL control until the displayed total begins to increment The accumulated count is displayed in whole numbers In the Totalize Events mode only the TRIGGER LEVEL control and the RESET button affect the display Stopping the Count If pin 28B at the rear interface connector is pulled to ground the Totalize mode opera tion will be stopped no more incoming events will be added to the total This is the most reliable method of stopping the count Adiscrete transistor or open collector logic should be used to pull pin 28B on the interface connector low i e pin 28B must not be forced high Rotating the TRIGGER LEVEL control until the DC 504 longer reacts to the input signal will also stop the totalize count An extra count be added to the total by rotating the TRIGGER LEVEL control ccw through the 0 level NOTE Connections to the rear interface connector are to be made by qualified service technicians only Restarting and Resetting When pin 28B at the rear interface connector is allowed to go high or when the TRIGGER LEVEL control is again adjusted to trigger the DC 504 on the input signal incoming events will advance the displayed total Resetting the count to zero can be Operating Instructions
15. 00 8032860 LAMP LED RDOUT 7 DECIMAL ORANGE 58361 03409 MAN36202 DS355 150 1018 00 8010100 8 032859 LAMP LED RED NUMERIC 50579 10 05355 150 1037 00 8 032860 LAMP LED RDOUT 7 SEGMENT LH DECIMAL ORANGE 58361 03409 MAN36202 DS360 150 1018 00 8010100 8032859 LAMP LED RED NUMERIC 50579 DATA LIT 10A DS360 150 1037 00 032860 LAMP LED RDOUT 7 SEGMENT LH DECIMAL ORANGE 58361 03409 MAN36202 DS365 150 1018 00 8010100 8032859 LAMP LED RED NUMERIC 50579 DATA LIT 10A DS365 150 1037 00 8032860 LAMP LED RDOUT 7 SEGMENT LH DECIMAL ORANGE 58361 03409 MAN36202 DS370 150 1018 00 BO10100 8032859 LAMP LED RED NUMERIC 50579 _ DATA LIT 10A DS370 150 1037 00 8032860 LAMP LED RDOUT 7 SEGMENT LH DECIMAL ORANGE 58361 03409 36202 DS375 150 1001 01 LAMP LED RED 2V 100MA 50434 HLMP 3200 J100 131 0955 00 CONN RCPT ELEC BNC FEMALE 13511 31 279 L340 108 0317 00 COIL RF FIXED 15UH 32159 71501M 151 1042 00 SEMICOND DVC SE MATCHED PAIR FET 22229 52089 0114 151 0424 00 TRANSISTOR SILICON NPN 04713 SPS8246 0130 151 0221 00 TRANSISTOR SILICON PNP 04713 SPS246 Q134 151 0221 00 TRANSISTOR SILICON PNP 04713 5 5246 151 0424 00 TRANSISTOR SILICON NPN 04713 5 58246 Q150 151 0424 00 TRANSISTOR SILICON NPN 04713 SPS8246 Q180 151 0341 00 TRANSISTOR NPN SI TO 106 04713 5 56919 Q180 STANDARD ONLY 0185 151 0341 00 TRANSISTOR NPN SI TO 106 04713 SPS6919 Q195 151 0504 00 8010100 8029999 TRANSISTOR SILICON N CHAN UNIJUNCTION
16. 156 CU BE GLD CLR 80009 214 1139 00 50 214 1127 00 1 ROLLER DETENT 0 125 DIA X 0 125 SST 80009 214 1127 00 E 105 0558 00 1 ACTUATOR SWITCH 80009 105 0558 00 52 401 0056 00 1 BEARING CAM SW REAR 80009 401 0056 00 53 210 0406 00 4 NUT PLAIN HEX 4 40 X 0 188 5 PL 73743 12161 50 54 211 0022 00 2 SCREW MACHINE 2 56 X 0 188 PNH STL CD PL 83385 ORD BY DESCR 210 0001 00 2 5 2 INTL 0 013 X 0 18 OD STL 78189 1202 00 00 0541 210 0405 00 2 NUT PLAIN HEX 2 56 X 0 188 BRS CO PL 73743 12157 50 386 3657 00 8033860 8036559 2 SUPPORT PLUG IN 80009 386 3657 00 386 3657 0 8036560 2 SUPPORT PLUG IN 93907 ORD BY OESCR 210 1270 00 8033860 2 WASHER FLAT 0 141 ID X 0 04 THK AL 80009 210 1270 00 55 426 0724 04 1 FR SECT PLUG IN BOTTOM 80009 426 0724 04 56 426 0725 05 1 FR SECT PLUG IN TOP 80009 426 0725 05 198 2213 00 8 010100 8 040459 1 WIRE SET ELEC 80009 198221300 57 175 0826 00 8010100 8040488 FT WIRE ELECTRICAL 3 WIRE RIBBON 80009 175 0826 00 175 0829 00 8010157 80404598 FT WIRE ELECTRICAL 6 WIRE RIBBON 08261 55 0626 710610 175 0833 00 8010157 8040459 FT WIRE ELECTRICAL 10 WIRE RIBBON 08261 55 1026 7 131 0707 00 8010157 8040459 16 CONTACT ELEC 22 26 AWG BRS amp CU BE GOLD 22526 47439 352 0164 01 8010157 8040459 1 HLOR TERM CONN 6 WIRE BROWN 80009 352 0164 01 352 0168 01 8010157 8 040459 1 HLDR TERM CONN 10 WIRE BROWN 80009 352 0168 01 175 1020 00 8032860 8040459 FT CABLE RF 50 OHM
17. 4 99K 1 0 125 91637 MFF1816G49900F R405 308 0463 00 RES FXD WW 0 3 OHM 1 3W 91637 RS2B R3000F T R R408 315 0162 00 RES FXD CMPSN 1 6K OHM 5 0 25W 01121 CB1625 8425 301 0222 00 RES FXD CMPSN 2 2K OHM 5 0 5W 01121 2225 R427 308 0686 00 RES FXD WW 2 2 5 2 75042 BWH 2R200J R428 315 0102 00 RES FXD CMPSN 1K 5 0 25 57668 25 01 R430 315 0131 00 RES FXD CMPSN 130 OHM 5 0 25W 01121 CB1315 R432 315 0102 00 RES FXD CMPSN 1K 5 0 25 57668 NTR25JE01KO R435 301 0511 00 RES FXD CMPSN 510 OHM 5 0 50W 57668 TR50J E 510E 100 260 0816 00 8010100 8032869 SWITCH SLIDE DPDT 0 5A 125VAC 79727 GF 126 0012A 100 260 1833 00 8032870 SWITCH SLIDE DPDT 82389 11P 1092 102 260 0723 00 SWITCH SLIDE DPOT 0 5 125 79727 GF126 0028 160 260 0723 00 SWITCH SLIDE DPOT 0 5A 125VAC 79727 GF126 0028 190 PART OF R190 5200 263 1031 00 SW CAM ACTR AS FUNCTION 80009 263 1031 00 5210 260 0723 00 SWITCH SLIDE DPOT 0 5A 125VAC 79727 GF126 0028 5235 260 1421 00 SWITCH PUSH 1 5 NON SHORT 59821 2KAA010000512 245 260 0723 00 SWITCH SLIDE DPOT 0 5A 125VAC 79727 GF126 0028 070 156 0079 02 MICROCIRCUIT DI DECADE COUNTER SCREENED 01295 SN7490A NP3 OR J u10 OPTION 01 ONLY 0160 156 0410 00 MICROCIRCUIT DI COUNTER TIME BASE 50088 MK5009P 0180 156 0041 05 MICROCIRCUIT DI DUAL D FLIP FLOP 01295 SN7474 9210 156 0079 02 MICROCIRCUIT DI DECADE COUNTER SCREENED 01295 SN7490A NP3 OR J 9215 156 0
18. SCREENED 01295 SN7475 NP3 OR 0292 156 0057 02 MICROCIRCUIT DI QUAD 2 INP GATE SCRN 01295 SN7401 NP3 OR JP 294 156 0482 01 MICROCIRCUIT DI PRESETTABLE DECADE CNTR SCR 27014 DM74S196 NA OR 0296 156 0040 02 MICROCIRCUIT DI QUAD LATCH SCREENED 01295 SN7475 NP3 OR JP 298 156 0057 02 MICROCIRCUIT DI QUAD 2 INP GATE SCRN 01295 SN7401 NP3 U310 156 0073 02 MICROCIRCUIT DI 5 BIT SHIFT REGISTER SCRN 01295 SN7496 U315 156 0165 02 MICROCIRCUIT DI DUAL 4 INP NOR GATE 01295 SN7425 9320 156 0128 01 MICROCIRCUIT DI BCD TO 7 SEG DCOR DRVR 80009 156 0128 01 0325 156 0093 02 MICROCIRCUIT DI HEX INV BUFFER BURN IN 01295 SN74LS00 9400 156 0071 00 MICROCIRCUIT LI VOLTAGE REGULATOR 04713 MC1723CL VR10 152 0243 00 SEMICOND DEVICE ZENER 0 4W 15V 5 M 14552 103810983 VR10 OPTION 01 ONLY VR110 152 0226 00 2 0 4 5 1 5 14552 103810980 VR140 152 0226 00 SEMICOND DEVICE ZENER 0 4W 5 1V 5 14552 103810980 VR146 152 0226 00 SEMICOND DEVICE ZENER 0 4W 5 1V 5 14552 TD3810980 VR430 152 0280 00 SEMICOND DEVICE ZENER 0 4W 6 2V 5 80009 152 0280 00 10 119 0262 00 OSCILLATOR RF XTAL CONTROLLED 5 MHZ ADJ 71034 C213 10 OPTION 01 ONLY 160 158 0079 00 XTAL UNIT QTZ 1 MHZ 0 001 00135 BY DESCR Y160 STANDARD ONLY 6 8 REV DEC 1984 DC 504 OPTIONS Your instrument may be equipped with one or more options This section describes those options or directs the rea
19. USCC CENTRALAB ELECTRONICS Div 4561 COLORADO LOS ANGELES 90039 22229 SOLITRON DEVICES INC SEMICONDUCTOR GROUP 8808 BALBOA AVENUE SAN DIEGO OPERS CA 92123 27014 NATIONAL SEMICONDUCTOR CORP 2900 SEMICONDUCTOR DR SANTA CLARA CA 95051 32159 WEST CAP ARIZONA 2201 E ELVIRA ROAD TUCSON AZ 85706 50088 MOSTEK CORP 1400 UPFIELD DR CARROLLTON TX 75006 50434 HEWLETT PACKARD COMPANY 640 PAGE MILL ROAD PALO ALTO CA 94304 50579 LITRONIX INC 19000 HOMESTEAD RD CUPERTINO CA 95014 56289 SPRAGUE ELECTRIC CO 87 MARSHALL ST NORTH ADAMS MA 01247 57668 R OHM CORP 16931 MILLIKEN AVE IRVINE CA 92713 58361 GENERAL INSTRUMENT CORP OPTO ELECTRONICS DIV 3400 HILLVIEW AVE PALO ALTO CA 94304 59660 TUSONIX INC 2155 N FORBES BLVO TUCSON AZ 85705 59821 CENTRALAB INC 7158 MERCHANT AVE EL PASO TX 79915 SUB NORTH AMERICAN PHILIPS CORP 71034 BLILEY ELECTRIC CO 2545 W GRANDVIEW BLVD ERIE PA 16512 71590 CENTRALAB ELECTRONICS Div OF GLOBE UNION INC 858 FORT DODGE 50501 74970 JOHNSON E F CO 299 10TH AVE S W WASECA MN 56093 75042 TRW ELECTRONIC COMPONENTS IRC FIXED RESISTORS PHILADELPHIA DIVISION 401 N BROAD ST PHILADELPHIA PA 19108 79727 C W INDUSTRIES 550 DAVISVILLE O BOX 96 WARMINISTER 18974 80009 TEKTRONIX INC P O BOX 500 BEAVERTON OR 97077 82389 SWITCHCRAFT INC 5555 N ELSTON AVE CHICAGO IL 60630 90201 MALLORY CAPACITOR CO DIV OF 3029 E WASHINGTON STREET P R MALLORY AND CO INC
20. an overflow condition The Reset output line is described above as a control line The Latch output line pin 19B provides a positive data good pulse of about 10 duration at each updating of the display register The BCD Output data lines provide the count in an 8 4 2 1 serial by digit method The output is active high logic and is interpreted in conjuction with the Digit Select Out lines The 8 4 2 1 lines are pins 20B 20A 21B and 19A respectively The Digit Select Out lines consist of time slot lines 751 755 The output is active high logic The lines scan from the most significant digit to the least significant digit at about a 3 5 kHz rate The TS1 TSS lines are pins 25A 24A 23A 22A and 21A respectively A Decimal Point Scanned Output line pin 27B goes high only when the decimal point is to the left of the digit whose select line is high A Gate Out line pin 28B provides a signal that goes high during the time that the gate is open i e while the input signal is gated into the decade counter units This pin is also used as the Totalize Start Stop input line REV C MAR 1980 Operating Instructions DC 504 REPACKAGING FOR SHIPMENT If the Tektronix instrument is to be shipped to a Tektronix Surround the instrument with polyethylene sheeting to Service Center for service or repair attach a tag showing protect the finish of the instrument Obtain a carton of owner with address and the name of an in
21. example of improperly terminated signal 400 mV ring can cause undesirable double triggering Fig 1 5 Illustration showing effects of proper input signal termination and improper input signal termination Noise impulses 20 millivolt rms AA Av M lN lI lI LI l L fL LU L A Erroneous count 8 Correct count 1339 1670 05 Fig 1 6 Triggering circuit responses to improper A and proper B TRIGGER LEVEL settings REV C JAN 1977 15 Operating Instructions DC 504 APPLICATIONS FREQUENCY MEASUREMENTS To measure and display the frequency of a signal up to 80 MHz set the FUNCTION switch to the appropriate FREQUENCY position Set the DISPLAY TIME control fully connect the signal to the INPUT connector and set the SOURCE switch to EXT front panel bnc connec tor You will note that higher resolution measurements take more counting time 1 kHz resolution measure ment on the MHz scale requires 1 ms while a 0 1 Hz resolution measurement on the kHz scale takes 10 s Final selection of FREQUENCY position of the FUNC TION switch depends on the frequency being measured desired resolution and willingness of the operator to wait for ameasurement Using the FREQUENCY MHz position higher frequencies may be measured but at the expense of the greater resolution capabilities of the longer FRE QUENCY kHz position Overflow Through intentional use of overflow dis plays it is possible
22. f SUO wis Signal Lines co metis REPACKAGING FOR SHIPMENT REV C MAR 1980 1 8 1 8 1 9 DC 504 Dc 504 TABLE OF CONTENTS cont Page Section 2 SPECIFICATION AND PERFORMANCE CHECK 2 1 Performance Conditions 2 1 Table 2 1 Electrical Characteristics 2 1 Table 2 2 Environmental Characteristics 2 3 Performance Check 2 4 Section 3 ADJUSTMENT 3 1 Section 4 MAINTENANCE 4 1 Section 5 CIRCUIT DESCRIPTION 5 1 Section 6 REPLACEABLE ELECTRICAL PARTS oer cem nm nr miae 6 6 1 OPTIONS Section 7 DIAGRAM AND CIRCUIT BOARD ILLUSTRATION 7 1 Section 8 REPLACEABLE MECHANICAL PARTS LIST AND EXPLODED VIEW 8 1 CHANGE INFORMATION REV OCT 1981 SAFETY SUMMARY The following text contains a two part summary of general safety precautions that must be observed during all phases of operation service and repair of this instrument OPERATIONS SAFETY SUMMARY The general safety information in this part of the summary is for both operating and servicing personnel Specific warnings and cautions may be found throughout the manual where they apply but may not appear in this summary TERMS In This Manual WARNING statements identify conditions or practices that could result in personal injury orloss of life CAUTION statements identify conditions or practicesthat could resultin damageto the equipment or ot
23. s ability to make a measurement In general the trigger controls are similar to oscilloscope controls except that the end resultis nota stable waveform graphic display but a stable digital frequency display Input Coupling Switch An internally mounted Input Coupling switch see Fig 1 4 selects ac capacitive or dc direct coupling for the input signal This coupling takes place after the signal arrives from the selected source and before it is passed on to the fixed attenuator Ac coupling is convenient for most frequency measurements to avoid readjusting the TRIGGER LEVEL control for changing dc levels It does however reduce sensitivity to signals below 10 Hz Thus for period measurements longer than 0 1 s dc coupling should be used TRIGGER LEVEL The TRIGGER LEVEL control must be properly adjusted for a stable reading It will not be difficult to adjust unless the signal amplitude or frequency is close to or perhaps beyond the specified limits Large amplitude signals 25 V at high frequencies 250 MHz will causethe trigger point to shift negative from its normal 0 location A signal that looks stable on an oscilloscope may still show jitter when measured with a digital counter If the Count varies from reading to reading it is probably due to jitter in the signal source If the count changes un reasonably the DC 504 is not being triggered properly either because the controls are not set right or the signal is beyond t
24. to improve the resolution of the counter Choose the FUNCTION switch position that displays the most significant number of the measurement as far to the left as possible Note the numbers displayed to the right of the decimal Move the decimal point to the left by choosing a higher resolution FUNCTION position if possible The OVERFLOW LED will light when the most significant number overflows the last storage register Note that the increased resolution does not change the accuracy of the measurement Jitter in the input signal will become more apparent as the resolution increases Measurement Rate Once a stable measurement is obtained the rate at which measurements are made can be controlled by the DISPLAY TIME control Turning the control cw holds off the counting and stores the display for a longer time before a new measurement is made and displayed Display time and counting time together com plete a measurement display cycle The DISPLAY TIME control is uncalibrated and variable from about 0 1 s at the ccw end to about 10 s at the cw end Atthe cw end there is a detent position called HOLD In HOLD the last count taken will be stored and displayed for an indefinite time A new count and display may be initiated by pushing the RESET button by turning the DISPLAY TIME control ccw or changing the FUNC TION switch to any other position REVOLUTIONS PER MINUTE RPM MEASUREMENTS The internal RPM switch when set to its RPM positio
25. zero is sensed pin 4 of U320 goes high setting U260B to unblank on the next scan clock pulse This disables the zero blanking until U260B is reset by the next time slot 1 pulse When the front panel RESET pushbutton is pressed pin 3 of U320 is forced low while pin 5 is forced high This results in all 35 5 LED X 7 segments LED display segments being lit for verification POWER SUPPLIES DIAGRAM 3 5 Volt Supply U400 derives a temperature compensated highly regulated 5 V from the 33 5 V unregulated supply of the TM 500 Series Power Module The NPN transistor which is located in the power module for proper heat dissipation is used for the series pass transistor R405 provides current limiting for the supply while R400 will turn off U400 if the supply attempts to draw excessive current through the IC 12 5 Volt Supply The 12 5 V Supply is derived from the TM 500 Series Power Module 33 5 V unregulated supply The supply consists of amplifier Q425 driving the PNP transistor located in the power module as an emitter follower The output of the emitter follower is divided by R432 and R435 and compared to the voltage across Zener diode VR430 Any difference between the Zener diode voltage and the voltage at the center of voltage divider R432 R435 is coupled as feedback to the base of Q425 which then drives the series pass PNP transistor to correctthe output voltage VR430 and Q425 temperature compensate each other t
26. 0 ette END ATTACHING PARTS __ BOARD ASSY INCLUDES 136 0252 04 4 SOCKET PIN TERM U W 0 016 0 018 DIA PINS 22526 75060007 175 5366 00 8040460 1 ASSY SP ELEC 6 26 AWG 7 0 L RIBBON 80009 175 5366 00 131 0707 00 8040460 6 CONTACT ELEC 22 26 AWG BRS amp CU BE GOLD 22526 47439 352 0164 01 8040460 1 HLDR TERM CONN 6 WIRE BROWN 80009 352016401 175536700 040460 1 CA ASSY SP ELEC 10 26 AWG 8 0 L RIBBON 80009 175 5367 00 131 0707 00 B040460 10 CONTACT ELEC 22 26 AWG BRS amp CU BE GOLD 22526 47439 352 0160 040460 1 HLDR TERM CONN 10 WIRE BROWN 80009 352 0680 333 1783 00 3 PANEL FRONT 80009 333 1783 00 22 214 1513 01 010100 8033829 1 LCH PLUG IN RET 80009 214151301 105 0719 00 8033830 3 LATCH RETAINING PLUG IN 80009 105071900 ATTACHING PARTS 2 213 0254 00 1 SCREW TPG TF 2 32 X 0 250 100 DEG FLH 45722 BY DESCR ATTACHING PARTS 105071800 8033830 8 035989 1 BAR LATCH ALSE 80009 105071800 105 0718 01 035990 1 BAR LATCH ALSE 80009 105 0718 01 24 331031400 1 WINDOW READOUT RED 80009 331031400 25 426 0916 00 1 FRAME RDOUT WOO 80009 426091600 26 1 SWITCH SLIDE SEE 5100 REPL E 386 2292 00 1 SUBPANEL FRONT 80009 3862292400 rene HATTACHING PARTS 28 213022900 010100 8 036279 4 FOR 6 20 X0 375 100 DEG FLH ST 93907 BY DESCR 213 0123 00 036280 4 TPG TF 6 32 X 0 375 SPCL TYPE FLH 93907 BY DES
27. 04713 50392 0195 151 0504 01 8030000 TRANSISTOR SILICON N CHAN UNIJUNCTION 04713 50309 0198 151 0341 00 TRANSISTOR NPN SI TO 106 04713 SPS6919 9200 151 0302 00 TRANSISTOR SILICON NPN 07263 5038487 0204 151 0341 00 TRANSISTOR NPN SI TO 106 04713 5 56919 Q210 151 0341 00 TRANSISTOR NPN SI TO 106 04713 SPS6919 0235 151 0341 00 TRANSISTOR NPN SI TO 106 04713 5 56919 0240 151 0341 00 TRANSISTOR NPN SI TO 106 04713 SPS6919 Q245 151 0341 00 TRANSISTOR NPN SI TO 106 04713 5 56919 Q247 151 0342 00 TRANSISTOR SILICON PNP 07263 5035928 260 151 0341 00 TRANSISTOR NPN SI TO 106 04713 SPS6919 Q264 151 0341 00 TRANSISTOR NPN SI TO 106 04713 SPS6919 Q300 151 0341 00 TRANSISTOR NPN SI TO 106 04713 5 56919 Q310 151 0341 00 TRANSISTOR NPN SI TO 106 04713 SPS6919 6 4 REV DEC 1984 Replaceable Electrical Parts DC 504 Tektronix Serial Model No Mfr Ckt No Part No Dscont amp Description Code Number 0350 151 0301 00 TRANSISTOR SILICON PNP 27014 2N2907A 0355 151 0301 00 TRANSISTOR SILICON PNP 27014 2N2907A 0360 151 0301 00 TRANSISTOR SILICON PNP 27014 2N2907A 0365 151 0301 00 TRANSISTOR SILICON PNP 27014 2N2907A 0370 151 0301 00 TRANSISTOR SILICON PNP 27014 2 2907 0425 151 0301 00 TRANSISTOR SILICON PNP 27014 2 2907 0428 151 0302 00 TRANSISTOR SILICON NPN 07263 5038487 304 0681 00 RES FXD CMPSN 680 OHM 10 1W 01121 GB6811 R10 OPTION 01 ONLY RH 315 0511 00 RES FXD CMPSN 510 OHM 5 0 25W 01121 CB5115
28. 058 02 MICROCIRCUIT DI HEX INVRTR SCREENED 01295 SN7404 U217 156 0041 05 MICROCIRCUIT DI DUAL D FLIP FLOP 01295 5 7474 0220 156 0180 04 MICROCIRCUIT DI QUAD 2 INPUT GATE 01295 SN74S00NP3 255 156 0081 02 MICROCIRCUIT DI RETRIG MONOSTABLE MV SCRN 80009 156 0081 02 U260 156 0041 05 MICROCIRCUIT DI DUAL D FLIP FLOP 01295 SN7474 U265 156 0030 00 MICROCIRCUIT DI QUAD 2 INPUT GATE 01295 SN7400 N OR J 9270 156 0079 02 MICROCIRCUIT DI DECADE COUNTER SCREENED 01295 SN7490A NP3 OR J 9272 156 0040 02 MICROCIRCUIT DI QUAD LATCH SCREENED 01295 SN7475 NP3 OR JP 9274 156 0057 02 MICROCIRCUIT DI QUAD 2 INP GATE SCRN 01295 SN7401 NP3 OR JP 276 156 0079 02 MICROCIRCUIT DI DECADE COUNTER SCREENED 01295 SN7490A NP3 OR J REV DEC 1984 6 7 Replaceable Electrical Parts DC 504 Tektronix Serial Model CktNo Description _________ Mi Part Number _ U278 156 0040 02 MICROCIRCUIT DI QUAD LATCH SCREENED 01295 5 7475 OR 9280 156 0057 02 MICROCIRCUIT DI QUAD 2 INP GATE SCRN 01295 SN7401 NP3 OR 9282 156 0079 02 MICROCIRCUIT DI DECADE COUNTER SCREENED 01295 SN7490A NP3 OR J 284 156 0040 02 MICROCIRCUIT DI QUAD LATCH SCREENED 01295 SN7475 NP3 OR 286 156 0057 02 MICROCIRCUIT DI QUAD 2 INP GATE SCRN 01295 SN7401 NP3 268 156 0079 02 MICROCIRCUIT DI DECADE COUNTER SCREENED 01295 SN7490A NP3 OR J 9290 156 0040 02 MICROCIRCUIT DI QUAD LATCH
29. 2 CR181 152 0008 00 SEMICOND DEVICE GERMANIUM 75V 60MA 14433 G1409 CR210 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V DO 35 12969 NDP0263 1N4152 CR212 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V DO 35 12969 NDP0263 144152 CR220 152 0141 02 SEMICOND OVC DI SW SI 30V 150MA 30V DO 35 12969 NOP0263 144152 CR225 152 0141 02 OVC DI SW SI 30V 150MA 30V DO 35 12969 NDP0263 144152 CR226 152 0008 00 SEMICOND DEVICE GERMANIUM 75V 60MA 14433 G1409 CR235 152 0141 02 SEMICOND OVC DI SW SI 30V 150MA 30V DO 35 12969 0 0263 1N4152 CR240 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V DO 3S 12969 NDP0263 1N4152 CR245 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V DO 35 12969 NDP0263 144152 CR246 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V DO 35 12969 263 1N4152 CR247 152 0141 02 SEMICOND DVC O SW SI 30V 150MA 30V DO 35 12969 263 14152 CR255 152 0141 02 SEMICOND DVC D SW SI 30V 150MA 30V DO 35 12969 NDP0263 144152 CR257 152 0141 02 DVC DI SW 1 30V 150MA 30V DO 35 12969 NDP0263 1N4152 CR320 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V DO 35 12969 NDP0263 1N4152 CR322 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V 00 35 12969 NDP0263 1N4152 CR325 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V D0 35 12969 NDP0263 1N4152 05250 150 1001 01 LAMP LED RED 2V 100MA 50434 HLMP 3200 DS350 150 1018 00 8010100 8 032889 LAMP LED RED NUMERIC 50579 10 05350 150 1037
30. 22 7027 C0G 330J C120 290 0512 00 CAP FXD ELCTLT 22UF 20 15V 56289 1960226 0015 C121 283 0023 00 DI 0 1UF 80 20 12 71590 20006681042 C128 290 0535 00 CAP FXD ELCTLT 33UF 20 10V 56289 1960336 0010 1 C144 283 0002 00 CAP FXD CER 01 0 010 80 20 500 59821 SDDH69L103Z C167 281 0781 00 CAP FXD CER DI 68PF 10 500V 59660 301 000 T300680K C167 STANDARD ONLY 281 0782 00 CAP FXD CER D 33PF 10 500V 59660 301 000N4700330K C170 STANDARD ONLY C172 281 0131 00 CAP VAR AIR DI 2 4 24 5PF 250V 74970 189 0509 075 172 STANDARD ONLY C190 290 0536 00 CAP FXD ELCTLT 10UF 20 25V 90201 TDC106MO25FL C205 283 0080 00 CAP FXD CER DI 0 022UF 80 20 25 59821 200060 2232 C235 283 0002 00 B010100 8036569 CAP FXD CER 01 0 010 80 20 500 59821 SDDH69L103Z C235 290 0534 00 8036570 CAP FXD ELCTLT 1UF 20 35V 56289 1960105 0035 1 C240 290 0534 00 CAP FXD ELCTLT 1UF 20 35V 56289 1960105 0035 1 C250 283 0023 00 CAP FXD CER DI 0 1UF 80 20 12V 71590 20006681042 C255 283 0000 00 01 0 0010 100 0 500V 59660 831610Y5U0102P C270 283 0000 00 CAP FXD CER DI 0 001UF 100 0 500 59660 831610 500102 C276 283 0000 00 CAP FXD CER Dt 0 001UF 100 0 500 59660 831610Y5U0102P C282 283 0000 00 CAP FXD CER 01 0 0010 100 0 500 59660 831610YSU0102P C288 283 0000 00 CAP FXD CER DI 0 001UF 100 0 500V 59660 831610Y5U0102P C2
31. 57668 NTR25J E470E R150 315 0511 00 RES FXD CMPSN 510 5 0 25 01121 5115 R152 315 0471 00 RES FXD CMPSN 470 OHM 5 0 25W 57668 NTR25J E470E R154 315 0270 00 RES FXD CMPSN 27 OHM 5 0 25W 01121 CB2705 R160 315 0221 00 RES FXD CMPSN 220 5 0 25 57668 NTR25J E220E R165 316 0186 00 RES FXD CMPSN 18M OHM 10 0 25W 01121 CB1861 R165 STANDARD ONLY R167 316 0126 00 RES FXD CMPSN 12M OHM 10 0 25W 01121 CB1261 R167 STANDARD ONLY R170 315 0243 00 RES FXD CMPSN 24K OHM 5 0 25W 57668 25 24 0 R170 STANDARD ONLY 175 315 0512 00 RES FXD CMPSN 5 1K 5 0 25 57668 NTR2SJ EOSK1 R176 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 57668 NTR25J E05K1 R177 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 57668 NTR25J E05K1 R179 315 0153 00 RES FXD CMPSN 15K 5 0 25 01121 1535 R180 315 0272 00 RES FXD CMPSN 2 7K 5 0 25 57668 NTR25J E02K7 R180 STANDARD ONLY R181 315 0103 00 RES FXD CMPSN 10K OHM 5 0 25W 57668 NTR25J E10K0 R182 315 0512 00 RES FXD CMPSN S 1K OHM 5 0 25W 57668 NTR25J E05K1 R187 315 0512 00 8010100 8036569 RES FXD CMPSN 5 1K OHM 5 0 25W 57668 NTR25J E05K1 R187 315 0752 00 8036570 RES FXD CMPSN 7 5K OHM 5 0 25W 57668 NTR25J E07K5 R190 311 1342 00 RES VAR NONWIR PNL S00K OHM 0 5W W SW 16546 206 014 R190 M PART OF S190 REV DEC 1984 6 5 ble Electrical Parts DC 504 Tektronix No Mfr No Par
32. 60 Pin Voltage Division Gate N Level Ratio Time 1 4 4 T S FUNCTION Switch Positions 10 1us gnd gnd gnd gnd PERIOD mSEC 1 us RESOLUTION 10 10 gnd gnd gnd 5 PERIOD mSEC 10 RESOLUTION 10 100 gnd gnd 5V gnd PERIOD SEC 1 ms RESOLUTION PERIOD SEC 1 ms RESOLUTION F 10 ims gnd gnd 5V 5 V FREQUENCY MHz 1 kHz RESOLUTION PERIOD SEC 10 ms RESOLUTION 10 10 ms gnd 5V gnd FREQUENCY MHz 1 kHz RESOLUTION 10 100 ms gnd 5V gnd 5 V FREQUENCY kHz 10 Hz RESOLUTION 10 1s gnd 5 v 5 v gnd FREQUENCY kHz 1 Hz RESOLUTION 10 10s gnd 5 v 5 v 5 V FREQUENCY kHz 1 Hz RESOLUTION Gate Generator The input to gate generator U220C which produces the control signals for the counter is determined by the position of FUNCTION switch S200 In the FREQUENCY positions of the FUNCTION switch the input to the gate generator is the time base signal with a period determined by the RESOLUTION setting of the FUNCTION switch In the PERIOD positions of the FUNCTION switch the gate generator input is the DC 504 front panel or plug in connector input signal after it has passed through the input amplifier and shaping circuits Operation of Frequency Mode Assume that the cycle starts just after a reset signal front panel generated by RESET pushbutton or just after a CLEAR signal internally generated before the next measurement cycle A short time
33. 94 283 0023 00 CAP FXD CER DI 0 1UF 80 20 12V 71590 20006681042 C300 283 0001 00 CAP FXD CER 01 0 0050 100 0 500 59821 200 61 502 C310 281 0525 00 CAP FXD CER DI 470PF 94PF 500V 59660 301000X5U471M C315 283 0002 00 CAP FXD CER 01 0 010 80 20 500 59821 50096911032 C325 283 0003 00 8010100 B036569 CAP FXD CER DI 0 01UF 80 20 150V 59821 200H66J1032 C325 283 0065 00 8036570 CAP FXD CER DI 0 001UF 5 100V 59660 0835 591 YSEO102 C340 290 0536 00 CAP FXD ELCTLT 10UF 20 25V 90201 TOC106M025FL C405 290 0535 00 CAP FXD ELCTLT 33UF 20 10V 56289 1960336X0010KA1 C408 283 0000 00 01 0 00 100 0 500 59660 831610Y5U0102P C415 290 0512 00 CAP FXD ELCTLT 22UF 20 15V 56289 1960226X0015KA1 C420 283 0023 00 CAP FXO CER DI 0 1UF 80 20 12V 71590 20006681042 283 0023 00 CAP FXD CER DI 0 1UF 80 20 12V 71590 20006681042 C425 283 0081 00 CAP FXD CER DI 0 1UF 80 20 25V 59821 2DDU69E1042 C435 290 0536 00 CAP FXD ELCTLT 10UF 20 6 25V 90201 TOC106M025FL CR108 152 0141 02 DVC DI SW SI 30V 150MA 30V DO 35 12969 263 1N4152 CR160 152 0141 02 SEMICOND DVC DI SW SI 30V 150MA 30V 00 35 12969 263 14152 REV DEC 1984 Replaceable Electrical Parts DC 504 Tektronix Serial Model No Mtr Ckt No Part No Name amp Descipton Code Mr Part Number CR161 152 0141 02 SEMICOND DVC DI SW S1 30V 150MA 30V 00 35 12969 NDP0263 1N415
34. ACHINE SKT SOCKET MECH MECHANICAL s SLIDE MTG MOUNTING SLFLKG SELF LOCKING NIP NIPPLE SLVG SLEEVING NON WIRE NOT WIRE WOUND SPR SPRING ORDER BY DESCRIPTION so SQUARE OUTSIDE DIAMETER Sst STAINLESS STEEL OVAL HEAD STEEL PHOSPHOR BRONZE Sw SWITCH PL PLAIN or PLATE T TUBE PLSTC PLASTIC TERM TERMINAL PN PART NUMBER THO THREAD PNH PAN HEAD THK THICK PWA POWER TNSN RECEPTACLE TPG TAPPING RES RESISTOR TRH TRUSS HEAD RIGID v VOLTAGE RELIEF VAR VARIABLE RETAINER w WITH SCH SOCKET HEAD WSHR WASHER SCOPE OSCILLOSCOPE XFMA TRANSFORMER SCR SCREW XSTR TRANSISTOR 8 1 Replaceable Mechanical Parts DC 504 CROSS INDEX MFR CODE NUMBER TO MANUFACTURER Code Manufacturer 000 00779 08261 09922 13511 22526 45722 57668 73743 78189 78471 79136 79807 80009 83385 86113 87308 90484 93907 NORTHWEST FASTENER SALES INC AMP INC SPECTRA STRIP CORP BURNDY CORPORATION AMPHENOL CARDRE DIV BUNKER RAMO CORP BERG ELECTRONICS INC USM CORP PARKER KALON FASTENER DIV R OHM CORP FISCHER SPECIAL MFG CO ILLINOIS TOOL WORKS INC SHAKEPROOF DIVISION TILLEY MFG CO WALDES KOHINOOR INC WROUGHT WASHER MFG CO TEKTRONIX INC CENTRAL SCREW CO MICRODOT MFG INC CENTRAL SCREW KEENE DIV L INDUSTRIES INC SOUTHERN SCREW ITT SURPRENANT TEXTRON INC CAMCAR DIV 7923 SW CIRRUS DRIVE
35. CHECK That the first digits count continuously and that all segments light properly f Repeat the above check for the remaining digits using the following settings Adjust the TRIGGER LEVEL as necessary for a count TG 501 DC 504 MARKER SEC Digit _ 50 ms _ E Check 2nd _ 5 ____ ___ 5 ms Check4th __ __50 5 Check 5th g Push the RESET button h CHECK Count starts over and the OVERFLOW light is off until the fifth digit counts past 9 i Remove the TG 501 OUTPUT from the DC 504 INPUT REV C JAN 1977 Dangerous potential exist at several points through out the DC 504 Remove the DC 504 from the power module or otherwise disconnect power module power before changing position of internal switches b Set the TG 501 marker dial to 2 ms c Connect the TG 501 Marker Out to the DC 504 INPUT through a coaxial cable and a 50 ohm terminator d Adjustthe DC 504 TRIGGER LEVEL for a reading of approximately 5000 The reading won t appear for about 10 seconds e Set the Latch Over ride switch S245 the rearmost of the group of three internal slide switches to its upper position Turn off the DC 504 power remove the left side cover to gain access to the switch then replace the cover and re apply power f CHECK That the digits of the DC 504 are in with each input pulse rather than remaining at zero until the measurement is complete g Set the Latch Over ride swit
36. CR END ATTACHING PARTS 29 337 1888 00 1 SHIELD ELEC 80009 337 1888 00 30 214 1061 00 3 SPRING GROUND FLAT 80009 214 1061 00 1 CKT BOARD ASSY FUNCTION SWITCH SEE A1 REPL nnn HATTACHING 213 0146 00 4 SCR TPG THD FOR 6 20 X 0 313 INCH PNH STL 83385 BY DESCR 210 0005 00 4 WASHER LOCK 6 EXT 0 02 THK STL 78189 1106 00 END ATTACHING PARTS REV DEC 1984 8 3 ible Mechanical Parts DC 504 Fig amp Index Tektronix Senal Model No Mtr No Part No Dscont Qy 12345 Name amp Description Code Mtr Number 1 BOARD ASSY INCLUDES 32 384 1290 00 1 EXTENSION SHAFT 0 125 OD 4 660 INCH LON 80009 384 1290 00 376 0051 01 1 CPLG SHAFT FLEX 0 127 ID X 0 375 OD 80009 376 0051 01 34 1 BOARD ASSY MAIN SEE A1 REPL 35 1 RES VAR SEE A1R190 REPL 36 210 0583 00 1 NUT PLAIN HEX 0 25 32 X 0 312 INCH BRS 73743 2X20317 402 3 210 0046 00 1 WASHER LOCK 0 261 ID INTL 0 018 THK BRS 78189 1214 05 00 0541 38 407 0803 00 1 BRACKET ELEC SW BRASS 80009 407 0803 00 de END ATTACHING PARTS 131 0566 00 2 BUS CONDUCTOR DUMMY RES 2 375 22 AWG 57668 JWW 0200E0 214 0579 00 1 TERM TEST POINT BRS CD PL 80009 214 0579 00 STANDARD ONLY 39 4 SWITCH SLIDE SEE 5102 160 210 245 REPL 40 1 SWITCH PUSH SEE 5235 REPL 41 361 0383 00 2 SPACER PB SW CHARCOAL 0 33 INCH LONG 80009 361 0383 00 42 131 0604 00 12 CONTAC
37. DC 504 done at any time by pressing the RESET button or by moving the FUNCTION switch to some other position then back to TOTALIZE EVENTS position PERIOD MEASUREMENTS Gating Period measurement provided counter timers primarily to overcome a basic limitation of counters i e the long time required to make a high resolution high accuracy measurement of low frequency signals For example a 1kHz signal requires 1 000 seconds of counting time to accumulate a million counts However in only one second a 1 kHz signal can gate one million clock pulses from a 1 MHz clock into the counter Simply stated the PERIOD mode reverses the func tions of signal and clock as compared to the frequency mode In frequency mode signal events are counted for some number of clock pulses then displayed In PERIOD clock pulses are counted for some number of signal events then displayed Low Frequencies Period measurements of signal below 10 Hz and particularly in the lowest decade from 0 1 Hz to 1 0 Hz become rather sensitive to wave shape and amplitude Since it is desirable for the signal to pass through the trigger hysteresis abruptly square wave inputs are preferred Sine and triangle waves can be measured accurately at the very low end if the input amplitude is kept somewhat above minimum specification so that the trigger input is driven hard NOTE Be especially wary of high frequency ringing or noise on the input signal T
38. Digit met 22 et Select Output 50 Dit em mo eco ouput 21 Output em m TES m eco ouput sm Normal Laten Output 1 use aco Ta High sm EN Good p Tal 17 eme inpar CEN Ground Nominal 16 input 08 Ds swing user connect Compaubie between oa y shed mper 14 ext clock mput and petweun two ereun as joven pass and V accurate inside DC 504 4 25 VAG winding 55 ix ae onan a REFER TO PARTS LOCATION GRID gt _ Bese ied ot PNP Series Pans PNP Seren Transformer P Emer fod or shield lead 9 19 PNP Series Pase Tas common 7383 V common return retum merge lt Cole ead ot rus Emitor aaor NEN Serie Pane e NPN Series Pons connection 6 Slot lead of NPN Seres Pus wswc vidis common V common return Ie THS V common Tis V common vum Tits viiieea gt ats vm oc 2 muc vc winding winding ne View ot pem a Assignments listed for pins 1A 13A and 18 138 are available in all power modules however only those pins marked with an asterisk are used by the DC 504 LSD Least sign
39. Hz 17 Coupling Test Point 71 9 Op Time Base C L Time Base Reset 0240 Count Holdoff Input 28A Power Supplies Manual Reset up Reset and Function Switch between stops Ext 14A __ 1 MHz Crystal do Oscillator and Programmable Divider U160 U180A Q180 d Q 205 0200 Gate Generator CLEAR Gate Signal BLOCK DIAGRAM Decade count FUNCTION Switch Time Base or Input to Gate Generator Select Time Base Division BCD Output 19A _ 218 _ 204 208 t 2 2 2 2 Gate 10 DCU 10 U220C U294 e 1296 ae 10 DCU 10 L EL Gating U274 U280 U286 U292 U298 CLEAR Overflow Output U217 U215C lt Buffer Inverter U215E 2200 Latch Over Ride NORM Display Time Control 9185 Q195 Q198 Gate Out 288 lt REV JAN 1977 Inverters 325 5 Lines NORM RPM 1 23B Scan Clock Out 24B L Tessie 24A Digit Select Outputs 1 21 TS5 Leading Zero Suppression U260B 5 Digit Lines Anode Voltage Enable Q350 0355 0360 Q365 0370 Decimal Point Scanned Output 278 1670 11 The voltages and waveforms shown on the diagrams were taken with a 1 MHz 1 volt peak to peak sinewave input signa
40. Hz position TOTALIZE EVENTS Events being totalized must be positive going pulses at least 6 25 ns in width The repeatable of the pulse must be at least 6 25 ns apart i e 80 MHz square wave The pulse amplitude must meet 80 MHz input sensitivity requirements Less input amplitude will be required for wider pulses PERIOD mSEC Positions 1 us and 10 us A random error of up to 5 counts may occur the 10 uSEC period position when measuring periods of less than 2 00 ms Such short periods should be measured in the 1 period position to obtain higher resolution SEC Positions 10 ms 1 ms and 0 1 ms Display Time Variable from about 0 1 s to about 10 s Detent position of DISPLAY TIME knob provides a HOLD mode INTERNAL TIME BASE Standard Option 1 Crystal Frequency 1 MHz 5 MHz Stability 0 C to 50 C after Within 1 part Within 5 parts 1 2 hour warm up in 10 10 Long Term Drift 1 part or less 1 part or less in 10 per month in 10 per month Accuracy Adjustable Adjustable to within to within 1 part in 10 5 parts in 10 Assuming transducer output Is one pulse per revolution 22 REV C JUN 1977 Specification and Performance Check DC 504 eee Minimum guaranteed Typical DC 504 DC 504 SENSITIVITY CURVE T T T 10MHz 15 MHz 50 80 100 MHz MHz Fig 2 1 DC 504 Sensitivity Curve Table 2 2 ENVIRONMENTAL CHARACTERISTICS 1670 06
41. I30 5 4215 01 CR320 84 134 46 R304 2 9217 G3 CR322 C1 R136 J6 R306 B2 U220 G4 CR325 c6 81399 25 R310 4255 G2 Rioo LOCATION EFF gt 5 SN 2032859 amp ELOW iol JUMPER FOR OPTION 1 RILO 220 crier COMPONENTS REMOVED FOR OPTION 1 Dc 504 5v SEE PARTS LIST FOR EARLIER VALUES AND SERIAL NUMBER RANGES OF PARTS OUTLINED OR DEPICTED IN GREY 05250 RESET To PIN3OF ee o ANB OF 0215 LATCH OVER RIDE 5245 1 gt T M COUNT HOLD OFF 1670 14 REVF MAR 1980 Al MAIN BOARD 5v 5200 12 o xe gt y R232 Q235 mooi 5 1 4 CR245 9 Gaten eurst 3 TO u294 8 U215D U220B Uz20c 704 Wu TROS 364 RESET Counter Time Base AND 22 5 Plug in Connector 58 Amplifier J100 amp 1 Counter Shaping Units 9110 0114 0130 0294 U 9134 0140 0150 282 0275 9270 35V Connector RESOLUTION plug in Connector 198 Time Base h U160 Q180 U180A Lat 7169 Normat Storage Gate Control P Register Gates 93200 Latch 296 0290 0284 Over L 9278 0272 Plug in 27B Conn
42. J E75E0 R335 315 0151 00 5 B032860 RES FXD CMPSN 150 5 0 25 57668 NTR25J E150E R336 315 0750 00 8010100 8032859 RES FXD CMPSN 75 5 0 25 57668 NTR25J E75E0 R336 315 0151 00 8032860 RES FXD CMPSN 150 OHM 5 0 25W 57668 NTR25J E150E R340 315 0101 00 RES FXD CMPSN 100 5 0 25 57668 NTR25J E 1006 R350 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 57668 NTR25JEO1K0 R351 315 0271 00 RES FXD CMPSN 270 OHM 5 0 25W 01121 CB2715 R355 315 0102 00 RES FXD CMPSN 1K 5 0 25 57668 NTR25JE01KO R356 315 0271 00 RES FXD CMPSN 270 OHM 5 0 25W 01121 CB2715 R360 315 0102 00 RES FXD CMPSN 1K 5 0 25 57668 NTR25JEO1KO R361 315 0271 00 RES FXD CMPSN 270 OHM 5 0 25W 01121 CB2715 R362 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 57668 NTR25J E0SK1 R363 315 0301 00 8010100 B032859 RES FXD CMPSN 300 5 0 25 57668 NTR25J E300E R363 315 0101 00 032860 RES FXD CMPSN 100 OHM 5 0 25W 57668 NTR25J E 100 R365 315 0102 00 RES FXD CMPSN 1K 5 0 25 57668 NTR25JEO1K0 R366 315 0271 00 RES FXO CMPSN 270 5 0 25 01121 2715 R370 315 0102 00 RES FXD CMPSN 1K 5 0 25 57668 NTR2SJEO1KO R371 315 0271 00 RES FXD CMPSN 270 OHM 5 0 25W 01121 CB2715 R375 315 0102 00 RES FXD CMPSN 1K 5 0 25 57668 NTR25JEO KO R400 304 0331 00 RES FXD CMPSN 330 OHM 10 1W 01121 083311 R402 321 0225 00 RES FXD FILM 2 15K OHM 1 0 125W 91637 MFF1816G21500F R403 321 0260 00 RES FXD FILM
43. K OHM 5 0 25W 57668 NTR25JE01K0 R240 315 0103 00 RES FXD CMPSN 10K 5 0 25 57668 _ NTR25J E10KO R243 315 0512 00 RES FXD CMPSN S 1K 5 0 25 57668 NTR25J EOSK1 R245 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 57668 NTR25J E05K1 R247 315 0103 00 RES FXD CMPSN 10K OHM 5 0 25W 57668 NTR25J E10K0 R250 315 0474 00 RES FXD CMPSN 470K 5 0 25 57668 NTR25J E470K R252 315 0511 00 RES FXD CMPSN 510 5 0 25 01121 5115 R255 315 0303 00 RES FXD CMPSN 30K 5 0 25 01121 CB3035 R257 315 0102 00 8010100 8036569 RES FXD CMPSN 1K 5 0 25 57668 NTR25JEO1KO R257 315 0562 00 8 036570 RES FXD CMPSN 5 6K OHM 5 0 25W 57668 NTR25J E05K6 R260 315 0102 00 8010100 8036569 RES FXD CMPSN 1K 5 0 25 57668 NTR25JEO1KO R260 315 0562 00 8 036570 RES FXD CMPSN 5 6K 5 0 25 57668 NTR25J E05K6 R262 315 0102 00 RES FXD CMPSN 1K 5 0 25 57668 NTR25JEO1K0 R264 315 0102 00 RES FXD CMPSN 1K 5 0 25 57668 NTR25JE01KO R268 315 0511 00 RES FXD CMPSN 510 5 0 25 01121 CB5115 R300 315 0512 00 RES FXD CMPSN S 1K OHM 5 0 25W 57668 NTR25J E05K1 R304 315 0333 00 RES FXD CMPSN 33K OHM 5 0 25W 57668 NTR25J E33KO R306 315 0334 00 RES FXD CMPSN 330K OHM 5 0 25W 01121 CB3345 R310 315 0511 00 RES FXD CMPSN 510 5 0 25 01121 CB5115 R315 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 57668 25 R316 315 0102 00 RES FXD CMPSN 1K 5 0 25 57668 N
44. RN OPTION 01 ONLY 315 0510 00 RES FXD CMPSN 51 5 0 25 57668 25 51 0 R12 OPTION 01 ONLY R100 315 0510 00 8010100 B032869 RES FXD CMPSN 51 OHM 5 0 25W 57668 NTR25J ESTEO R100 303 0510 0 8032870 RES FXD CMPSN 51 OHM 5 1W 01121 685105 R102 315 0330 00 RES FXD CMPSN 33 OHM 5 0 25W 01121 CB3305 R106 323 0385 00 RES FXD FILM 100K OHM 1 0 50W 75042 0 1003 R108 322 0621 00 RES FXD FILM 900K OHM 1 0 25W 75042 0 9003 R110 315 0301 00 RES FXD CMPSN 300 OHM 5 0 25W 57668 NTR25J E300E 315 0561 00 RES FXD CMPSN 560 OHM 5 0 25W 01121 CB5615 R116 315 0101 00 RES FXD CMPSN 100 OHM 5 0 25W 57668 NTR25J E 100E R117 315 0111 00 RES FXD CMPSN 110 OHM 5 0 25W 57668 NTR25J E110E R120 315 0910 00 RES FXD CMPSN 91 OHM 5 0 25W 01121 9105 R123 315 0151 00 RES FXD CMPSN 150 OHM 5 0 25W 57668 NTR25J E150E R125 311 0091 00 RES VAR NONWIR 1K OHM 10 0 50W 01121 W 3083E R127 315 0361 00 RES FXD CMPSN 360 OHM 5 0 25W 01121 3615 R130 315 0112 00 RES FXD CMPSN 1 1K OHM 5 0 25W 0121 1125 R134 315 0510 00 RES FXD CMPSN 51 OHM 5 0 25W 57668 NTR25J E51E0 R136 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 57668 25 01 R139 315 0121 00 RES FXD CMPSN 120 5 0 25 01121 1215 R140 315 0511 00 RES FXD CMPSN 510 OHM 5 0 25W 0121 5115 R144 315 0390 00 RES FXD CMPSN 39 OHM 5 0 25W 57668 NTR25J E39E0 R146 315 0471 00 RES FXD CMPSN 470 OHM 5 0 25W
45. T ELEC CKT BD SW SPR CU BE 80009 131 0604 00 SEE MAINTENANCE SECTION FOR REPAIR 43 136 0260 02 8010100 8041289 8 SKT PL IN ELEK MICROCIRCUIT 16 DIP LOW 09922 DILB16P 108T 136 0728 00 041290 1 SKT PL IN ELEK MICROCKT 14 CONTACT 09922 DILB14P 108 E 136 0269 02 8010100 8041288 20 SKT PL IN ELEK MICROCIRCUIT 14 DIP 09922 DILB149P 108 136 0729 00 8 041290 1 SKT PL IN ELEK MICROCKT 16 CONTACT 09922 DILBI6P 108T 131 0608 00 010157 16 TERMINAL PIN 0 365 L X 0 025 PH BRZ GOLD 22526 48283 036 136 0234 00 8036570 2 SOCKET PIN TERM 0 088 OD X 0 247 INCH L 00779 380598 1 136 0252 04 8036570 6 SOCKET PIN TERM U W 0 016 0 018 DIA PINS 22526 75060 007 175 5364 00 8040460 1 CABLE ASSY RF 50 OHM COAX 12 0 L 9 4 80009 175 5364 00 175 5365 00 8 040460 1 CABLE ASSY RF 3 26 AWG 4 0 L RIBBON 80009 175 5365 00 263 1031 00 1 SW AS FUNCTION 80009 263 1031 00 5 ATTACHING 45 211 0116 00 8 010100 8 039688 4 SCR ASSEM WSHR 4 40 X 0 312 INCH PNH BRS 83385 BY DESCR 211 0292 00 8039690 4 SCR ASSEM WSHR 4 40 X 0 29 BRS NI PL 78189 BY DESCR END ATTACHING PARTS ACTUATOR ASSY INCLUDES 46 200 1010 00 1 COVER CAM SW 12 ELEMENT 0 83 INCH DIA 80009 200 1010 01 47 354 0219 00 RING RETAINING FOR 0 25 INCH SHAFT 79136 5103 25 MD R 48 401 0057 00 1 BEARING CAM SW FRONT 80009 401 0057 00 49 214 1139 03 1 SPRING FLAT RED COLORED 80009 214 1139 03 214 1139 00 1 SPRING FLAT 0 885 X 0
46. TR25JEO1K0 R317 315 0102 00 RES FXD CMPSN 1K 5 0 25 57668 NTR25JE01K0 R318 315 0102 00 RES FXD CMPSN 1K 5 0 25 57668 25 R322 315 0301 00 RES FXD CMPSN 300 OHM 5 0 25W 57668 NTR25J E300E R325 315 0512 00 8010100 8036569 RES FXD CMPSN 5 1K OHM 5 0 25W 57668 NTR25J E05K1 R325 315 0102 00 8036570 RES FXD CMPSN 1K 5 0 25 57668 NTR25JEO1K0 R330 315 0750 00 8010100 8032859 RES FXD CMPSN 75 5 0 25 57668 NTR25J E75E0 R330 315 0151 00 8032860 RES FXD CMPSN 150 5 0 25 57668 NTR25J E150E R331 315 0750 00 8010100 B032859 RES FXD CMPSN 75 OHM 5 0 25W 57668 NTR25J E75E0 R331 315 0151 00 032860 RES FXD CMPSN 150 5 0 25 57668 NTR25J E150E R332 315 0750 00 8010100 8032859 RES FXD CMPSN 75 5 0 25 57668 NTR25J E75E0 R332 315 0151 00 8032860 RES FXD CMPSN 150 OHM 5 0 25W 57668 NTR25J E150E R333 315 0750 00 8010100 8032859 RES FXD CMPSN 75 5 0 25 57668 NTR25J E75E0 R333 315 0151 00 8032860 RES FXD CMPSN 150 5 0 25 57668 NTR25J E150E R334 315 0750 00 8010100 B032859 RES FXD CMPSN 75 5 0 25 57668 NTR25J E75E0 R334 315 0151 00 8032860 RES FXD CMPSN 150 5 0 25 57668 NTR25J E150E 6 6 REV DEC 1984 Replaceable Electrical Parts DC 504 Tektronix No Mir No Part No Dscont Name amp tion Code Mfr Part Number R335 315 0750 00 8010100 8032859 RES FXD CMPSN 75 5 0 25 57668 NTR25
47. Tektronix COMMITTED TO EXCELLENCE DC 504 COUNTER TIMER INSTRUCTION MANUAL Tektronix Inc Box 500 Beaverton Oregon 97077 Serial Number 070 1670 01 First Printing JUN 1974 Product Group 75 Revised DEC 1984 INSTRUMENT SERIAL NUMBERS Each instrument has a serial number on a panel insert tag or stamped on the chassis The first number or letter designates the country of manufacture The last five digits of the serial number are assigned sequentially and are unique to each instrument Those manufactured in the United States have six unique digits The country of manufacture is identified as follows 8000000 Tektronix Inc Beaverton Oregon USA 100000 Tektronix Guernsey Ltd Channel Islands 200000 Tektronix United Kingdom Ltd London 300000 Sony Tektronix Japan 700000 Tektronix Holland NV Heerenveen The Netherlands TABLE OF CONTENTS Page OPERATORS PART ENGLISH Section 1 OPERATING INSTRUCTIONS INSTRUMENT DESCRIPTION PREPARATION FOR USE Installation and Removal Controls and Connectors INPUT CONSIDERATIONS Input Sources Triggering Measurement Intervals Maximum Input Volts Sensitivity and Q sa sis em mite Range Setting Slope and Level APPLICATIONS Frequency Measurements Revolutions Per Minute RPM Measurements Totalizing Period Measurements FUNCTIONS AVAILABLE AT REAR INTERFACE CONNECTOR CONTROL UNES 345535 ots 2554555
48. USE INSTALLATION AND REMOVAL Turn the power module off before inserting the plug in otherwise damage may occur to the plug in circuitry Check to see that the plastic barriers on the inter connecting jack of the selected power module compart ment match the cut outs in the DC 504 circuit board edge connector Align the DC 504 chassis with the upper and lower guides see Fig 1 2 of the selected compartment Push the module in and press firmly to seat the circuit board in the interconnecting jack REV C JAN 1977 To remove the DC 504 pull the release latch located in the lower left corner until the interconnecting jack disengages and the DC 504 will slide out Apply power to the DC 504 by pulling out the power switch knob of the power module CONTROLS AND CONNECTORS Refer to Figs 1 3 and 1 4 Even though the DC 504 is fully calibrated and ready to use the functions and actions of the controls and connectors should be reviewed before attempting to use it Note that some thought must be given to the settings of the internal switches shown in Fig 1 3 for example if you want to measure rpm the RPM NORM switch must be set for RPM Also if measuring events that occur at a slow rate the Input Coupling switch should be set for dc Operating Instructions DC 504 1670 03 1 2 Fig 1 2 Plug in installation and removal Latch Over ride A two position slide Switch that determines if the contents of th dis
49. after the front panel RESET pushbutton is released the stretched reset pulse in the time base ends and 1 ys later the time base outputs a falling edge that is applied to inverter U215E via the FUNCTION switch The signal from U215E is applied to pins 3 and 11 of U217 which is connected as a three state counter Prior to the falling edge from the time base both pins 5 and 9 of U217 were set high by the CLEAR signal 52 The first rising edge at pin 3 of U217 causes pin 5to go low and pin 6 to go high Since NAND gate U220D now hasa high at both inputs its output goes low U215C inverts the output of U220D and applies it to pin 9 of U220C opening the gate With the gate open the amplified and shaped input signal to the DC 504 is inverted by U220B and applied through U220C to the decade counter units DCU The gate U220C can be forced to close by pulling pin 9 of U220C to ground through interface connector pin 28B thus stopping the count CR226 protects U215C when pin 28B is connected to ground The next rising edge from the time base which occurs after a period T selected by the FUNCTION switch RESOLUTION setting keeps pin 5 of U217 low and also forces pin 9 to golow This removes the high from pin 13 of U220D causing its output to go high The rising edge now occurring at pin 11 of U220D is applied to pin of 0255 a one shot multivibrator where it causes an output pulse approximately 10 us wide This output pulse from 0255 pa
50. al Information Frequency Range or Revolutions Per Minute rpm DC Coupled INPUT 0 Hz to at least 80 MHz Coupling selected with an internal switch AC Coupled 10 Hz to at least 80 MHz Coupling selected with an internal Switch Sensitivity 20 mV rms 56 6 mV p p below 15 MHz Sine wave used for measurement 35 mV rms 99 mV p p at or below 50 MHz derated to typically 175 mV rms 495 mV p p at 80 MHz see Fig 2 1 Input Impedance 1 paralleled by approximately 20 pF Maximum Safe Voltage 250 V at 500 kHz or less derate 20 dB decade to 25 MHz 5 V from 25 MHz to 80 MHz Trigger Level Range Nominally 1 5 V to 1 5 V Triggering Error 0 596 of cycle at minimum trigger sensitivity Signal Source Internal rear connector interface or external front panel bnc Selected by front panel SOURCE Switch Slope Plus for all functions DISPLAY Display Accuracy 1 count time base accuracy trigger error REV C JAN 1977 2 1 Specification and Performance Check DC 504 Table 2 1 cont Characteristics Performance Requirements Supplemental Information Maximum Resolution FREQUENCY or RPM kHz Positions 0 1 Hz 1 Hz and 10 Hz Seven digit resolution possible in 1 rpm 10 rpm and 100 rpm overflowed kHz position MHz Positions 0 1 kHz and 1 kHz Nine digit resolution possible in 1000 rpm and 10 k rpm overflow k
51. ating and current rating Refer fuse replacement to qualified service personnel Do Not Operate in Explosive Atmospheres To avoid explosion do not operate this instrument an atmosphere of explosive gases unless it has been specifically certified for such operation Do Not Remove Covers or Panels To avoid personal injury do not remove the instrument covers or panels Do not operate the instrument without the covers and panels properly installed Do Not Operate Without Covers To avoid personal injury do not operate this instrument without covers or panels installed Do not apply power to the instrument via a plug in extender SERVICING SAFETY SUMMARY FOR QUALIFIED SERVICE PERSONNEL ONLY Refer also to the preceding Operators Safety Summary Do Not Service Alone Do not perform internal service or adjustment of this instrument unless another person capable of rendering first aid and resuscitation is present Use Care When Servicing With Power On Dangerous voltages exist at several points in this instrument To avoid personal injury do not touch exposed connections and components while power is on Disconnect power before removing protective panels soldering or replacing components Power Source The power module is intended to operate from a power source that will not apply more than 250 volts between the supply conductors or between either supply conductor and ground A protective ground connection by way of the gro
52. ch S245 back to its down position this function will not perform correctly in instruments before 8022370 R257 and R260 should be changed from 5 6 27 Specification and Performance Check DC 504 h Set the TG 501 marker dial to 1 ms i Set the DC 504 FUNCTION to FREQUENCY kHz 10 Hz RESOLUTION 1 CHECK 504 to read approximately 10 00 k Set the RPM switch S210 the frontmost of the group of three internal slide switches to its upper position 504 to read approximately 6000 m Set RPM switch 521010 its lower NORM position n Remove the TG 501 OUTPUT from the DC 504 INPUT 7a Check Standard Clock Accuracy a Set the following controls DC 504 DISPLAY TIME ccw FUNCTION FREQUENCY kHz Hz RESOLUTION TRIGGER LEVEL Midrange SOURCE EXT All internal switches Down b Connect the 1 MHz frequency standard to DC 504 INPUT c CHECK DC 504 reads gt 9 9900 999990 0 Hz and 0 0100 1000010 0 Hz with OVERFLOW light on NOTE Actual reading will depend on accuracy of input standard and tne internal adjustment of the DC 504 clock Note also that with 1 Hz resolution sixth decade and above digits overflow 28 7b Check Option 1 Clock Accuracy a Set the following controls DC 504 DISPLAY TIME ccw FUNCTION FREQUENCY kHz Hz RESOLUTION TRIGGER LEVEL Midrange SOURCE EXT All internal switches Down b Connect the 1 MHz fr
53. ch or contactor circuit board etc heat radiator etc T Transformer AT Attenuator fixed or variable HR Heater TC Thermocouple B HY Hybrid circuit TP Test point BT Battery J Connector stationary portion U Assembly inseparable non repairable Relay integrated circuit etc L Inductor fixed or variable V Electron tube CR M Meter VR Voltage regulator zener diode etc DL P Connector movable portion W wWirestrap or cable DS Indicating device lamp Q Transistor or silicon controlled Y Spark Gap ier Z Phase shifter F Fuse R Resistor fixed or variable FL Filter RT Thermistor The following special symbols are used on the diagrams Cam Switch Closure Chart Dot indicates switch closure Internal Screwdriver Adjustment Strap or Link Plug to E C Board Identifies Panel Controls Connectors and Indicators 5 lejao 7 wie Modified Component See Parts List so Depicted in grey with grey outline Plug Index SEL Value Selected at Factory Refer to Waveform 5 lt Refer to Diagram Number Coaxial Connector Test Voltage Shielding Heat Sink Decoupled or Filtered Voltage Assembly Number RIO N Board Name 100 e Etched Circuit Board Outlined AMPL in Black el Schematic Name and Number VERTICAL AMPLIFIER DC 504 INPUT XT x P And Input INT pe Protection 16A Internal Input K Input 1 M
54. der to where the option is documented OPTION 1 9 lon 1 the DC 504 with a temperature compensated 5 MHz oscitator to obtain a highly stable and precise internal This option includes an IC which may be connected as as ihe caida Dy Ly 5 MHz oscillator or a divide by ten 10 MHz oscillator R10 680 5 MHz jumper factory installed Optional 10 MHz jumper 5 Optional 10 MHz input 1 MHz output Use shielded 45V Optional Gnd 10MHzinput 33 Gnd 5MHz jumper 10MHz be Option 10 MHz 1MHz Gnd jumper remove output jumper shielded cable REV C JAN 1977 1670 19 Section 7 DC 504 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 0 Symbols used on the diagrams are based on ANSI Standard Y32 2 1975 Logic symbology is based on ANSI Y32 14 1973 in terms of positive logic Logic symbols depict the logic function performed and may differ from the manufacturer s data The following prefix letters are used as reference designators to identify components or assemblies on the diagrams Assembly separable or repairable H Heat dissipating device heat sink S Swit
55. dividual at your corrugated cardboard of the correct carton strength firm that can be contacted Include complete instrument and having inside dimensions of no less than six inches serial number and a description of the service required more than the instrument dimensions Cushion the instrument by tightly packing three inches of dunnage or urethane foam between carton and instrument on all Sides Seal carton with shipping tape or industrial stapler Save and re use the package in which your instrument was shipped If the original packaging is unfit for use or not available repackage the instrument as follows The carton test strength for your instrument is 200 pounds REV C JAN 1977 1 9 PERFORMANCE CONDITIONS The electrical characteristics are valid only if the DC 504 has been calibrated at an ambient temperature between 20 C and 30 C and is operating at an ambient temperature between 0 C and 50 C unless otherwise noted Section 2 DC 504 SPECIFICATION AND PERFORMANCE CHECK SPECIFICATION Items listed in of Table 2 1 are Check in this mi Information colui are either Table 2 1 ELECTRICAL CHARACTERISTICS explanatory notes or characteristics for which no limits are specified the Performance Requirements column verified by completing the Performance anual Items listed in the Supplemental imn are not verified in this manual they performance Characteristics Performance Requirements Supplement
56. ector Decimal 21A Point 22A 23A Scanned 24A 25A Display 0320 2608 Scan Time Slot U315A 0350 Q355 19a 21B Clock Decoder wf 0310 0300 U310 03158 0325 9366 9365 0370 204 208 05350 05355 BCD 05370 1670 09 SEE PARTS LIST FOR EARLIER VALUES AND SERIAL NUMBER RANGES OF PARTS OUTLINED OR DEPICTED IN GREY SCAN 245 oot 208 Sox eco 71B lt tsp 19 4320 7441 7 SEGMENT DECODER GATED BURST 296 uso X LL ES p375 ey 4 6 re iz m 1 210 276 9 17 7490 3 C276 e 0 s 9 274 5 1401 4 151 E 4 tu Le RO 5 s 2 u270 9 14272 1 7490 8 7 3 1 D 2 14 io I qu Be 112 BOARD P350 P352 2j 4 5 OVERFLOW
57. equency standard to DC 504 INPUT CHECK DC 504 reads 29 9995 and 0 0005 with OVERFLOW light on NOTE Actual reading will depend on accuracy of input standard and the internal adjustment of the DC 504 clock d Remove the 1 MHz frequency standard from the DC 504 INPUT 8 Check Counter Sensitivity and Range a Set the following controls DC 504 DISPLAY TIME FUNCTION FREQUENCY kHz 1 Hz RESOLUTION TRIGGER LEVEL Midrange SOURCE EXT All internal switches Down SG 502 FREQUENCY Hz 1 MULTIPLIER X10 STEP ATTENUATOR 40 SG 503 Amplitude Multiplier 1 Frequency Range MHz 10 MHz 25 MHz NOTE Use an oscilloscope having adequate bandwidth to set specified signal amplitudes b Set the SG 502 Var Attenuator for a signal amplitude of 56 mV peak to peak when terminated with 600 ohms c Connect the SG 502 sine wave output to the DC 504 INPUT through a coaxial cable and a600 ohm terminator d Set the DC 504 TRIGGER LEVEL as necessary to obtain a stable display CHECK DC 504 reads 010 001 depends on fre quency setting accuracy of SG 502 e Remove the SG 502 output from DC 504 INPUT f Connect the SG 503 Output to DC 504 INPUT through a coaxial cable and a 50 ohm terminator The terminator must be placed at DC 504 end of the cable g Set the DC 504 FUNCTION to 1 kHz h CHECK Counter sensitivity from 15 MHz to 80 MHz using the following table Also check for a stable DC 504 display
58. for large amplitude fast rise external oscillator signals to generate crosstalk with the internal 1 MHz at S160 Thus it is recommended that Ext Clock Input be removed from pin 14A if it is not to be used for a period of time Likewise if you expect to use an external oscillator as the sole time base signal for the DC 504 then the internal oscillator can be disabled by removing Y160 Unsoldering at least one side of R180 from the circuit board will also suffice A Count Holdoff input line forces the DC 504 into the hold mode as long as pin 28A is held high The DC 504 display will hold the lastest measurement and will take another count only afterthe reset button has been pushed the FUNCTION switch rotated or the count holdoff signal goes low or open 18 A Totalize Start Stop input line can be used to inhibit the gate stop the counting in the TOTALIZE mode In any other mode the counting will stop and the display will go to zero after a time determined by the DISPLAY TIME control Pin 288 must not be forced high or the gate will be forced open in all modes Open collector logic or a discrete transistor without pull up resistor is recommended to pull pin 28B low Pin 28Bis also used as a Gate Out signal line see following text SIGNAL LINES These lines provide for signal input counter status and clock signal outputs and bed data outputs An overflow output line pin 23B goes high to indicate that the counter is in
59. gate interval in the is made and belore the FREQUENCY positions next measurement is and the clock rate in the taken Display time can be PERIOD positions varied from about 0 15 ccw to about 10 seconds cw HOLD position detent provides con TRIGGER tinuous display until reset LEVEL by pressing the RESET button lia INPUT Connector BNC connector for appli s TRIGGER LEVEL Control cation of sign Selects the amplitude point on the input signal at which the triggering window is placed 20pF Te amp y umA DC 504 IUNTER TIMER SOURCE Switch RESET Pushbutton Selects signal input source INT selects the Momentary pushbutton rear connector input EXT which manually resets selects the front panel acts as a master resel BNC connector input and provides a segment check of the 5 readout digits 1670 02 Fig 1 4 Function of Controls and Connectors REV C JAN 1977 Operating instructions DC 504 INPUT CONSIDERATIONS INPUT SOURCES The front panel SOURCE switch selects either the front panel bnc connector EXT or the rear interface connector INT via pin 16A The external input presents a high impedance of approximately 1 paralleled by about 20 pF The internal input circuit presents a nominal 50 Q impedance to match typical coaxial cable signal connections TRIGGERING The TRIGGER LEVEL and Input Coupling internal Switch controls affect the counter
60. he counter s capabilities too small in amplitude or too high in frequency A stable input signal will show only 1 count of jitter 1 of least significant digit when the DC 504 is properly triggered NOTE The specified jitter for the DC 504 is 0 5 of one input cycle 1 count 14 MEASUREMENT INTERVALS To adjust the trigger controls choose the TOTALIZE EVENTS position of the FUNCTION switch or for any FUNCTION switch position manually over ride the latch using the internal Latch Over Ride switch This gives rapid feedback via the display as to whether the Counter is being triggered or not If it is numbers will appear in the display Frequencies below 0 1 Hz will not be resolvable in the lowest frequency kHz scale For such low frequencies a period measurement is better suited MAXIMUM INPUT VOLTS SENSITIVITY AND FREQUENCY RANGE The maximum safe input voltage is 250 V dc peak ac at 500 kHz or less Above 500 kHz the maximum safe positive voltage decreases linearly at 20 dB per decade A 5 volt input is tolerable at any frequency The DC 504 will respond to signal amplitudes of at least 20 mV rms 56 6 mV peak to peak at frequencies of up to at least 15 MHz 35 mV rms 99 mV peak to peak up to 50 MHz and 175 mV rms 499 mV peak to peak up to 80 MHz Depending on the coupling mode selected the low frequency limit for the input is either 0 Hz dc coupled or 10 Hz ac coupled Because of the very high
61. her property As Marked on Equipment CAUTION indicates a personal injury hazard not immediately accessible as one reads the marking or a hazard to property including the equipment itself DANGER indicates a personal injury hazard immediately accessible as one reads the markings SYMBOLS In This Manual This symbol indicates where applicable cautionary or other information is to be found As Marked on Equipment 4 DANGER High Voltage Protective ground earth terminal NATTENTION refer to manual Grounding the Power Module This instrument is grounded through the grounding conductor of the power module To avoid electrical shock plug the power module cord into a properly wired receptacle before connecting tothe instrument input or output terminals Do not use the power cord grounding conductor as the only grounding connection between two or more devices To avoid electrical shock connect the grounding terminals together with separate conductors REV A OCT 1980 DC 504 Use the Proper Power Cord Use only the power cord and connector specified for the power module Use only a power cord that is in good condition For detailed information on power cords and connectors see the power module manual Refer cord and connector changes to qualified service personnel Use the Proper Fuse To avoid fire hazard use only the fuse specified inthe parts list for your instrument and which is identical in type voltage r
62. hey can cause false triggering in the PERIOD mode However if the TRIGGER LEVEL control is rotated through the threshold point 0 level for zero volts dc in a ccw direction the displayed total will advance by one REV B JAN 1977 Operating Instructions DC 504 FUNCTIONS AVAILABLE AT REAR INTERFACE CONNECTOR CONTROL LINES Solder pads have been connected to unassigned pins at the rear connector for routing signals to and from the DC 504 for specialized applications see Rear Connector Pin Assignments One or more compartments of a multi plug in power module can be wired with barriers installed to provide specific functions between compartments See the power module instruction manual for additional information A reset input line pin 26A which doubles as a reset output signal line clears the counter to zero when a lowis applied to the line An external clock signal may be used instead of the internal 1 MHz clock by connecting the external standard to the Ext Clock input line pin 14A and setting the internally located Int Ext Oscillator switch to Ext A shielded cable connected between the E O solder points near pin 14A and U180 will be required The external oscillator input is somewhat duty cycle sensitive It is recommended that the positive portion of this input have a duty cycle of at least 15 but no more than 70 Individual DC 504s may allow the user to exceed these limits by a small margain It is possible
63. his completes the Performance Check Procedure 2 9 SERVICE AVAILABLE Tektronix Inc provides complete instrument repair and adjustment at local Field Service Centers and at the Factory Service Center Contact your local TEKTRONIX Field Office or representative for further information TEST EQUIPMENT REQUIRED The test equipment listed in Table 3 1 or equivalent is required for making adjustments to the DC 504 Test equipment characteristics listed are the minimum re quired to verify the accuracy of the adjustments made Substitute equipment must meet or exceed the stated requirements All test equipment is assumed to be operating within tolerance Section 3 DC 504 ADJUSTMENT PROCEDURE NOTE The performance of this instrument can be checked at any temperature within the 0 C to 50 C range Make any adjustments at a temperature between 20 C and 30 C 68 F and 86 F 1 Preparation Place the DC 504 ona plug in extender Tektronix Part No 067 0645 02 Plug the extender into the Power Module to be used Turn on the Power Module and all test equipment Allow 30 minutes warm up time before proceeding Table 3 1 LIST OF TEST EQUIPMENT REQUIREMENTS Description _ Performance Requirements Application Example Oscilloscope 1 MHz bandwidth or greater Time Base frequency Tektronix SC 501 check and adjustment Probe 10X attenuation to reduce circuit Frequency check and Tektronix P6006
64. ificant digit MSD Most significant digit LSB Least significant bit MSB most significant bit Pin 26A level goes low only when Front panel RESET pushbutton is pushed b During power up reset c Change in 1670 10 position of FUNCTION siwich It does go low when the DC 504 clears itself for another count DIGIT SELECT OUTPUT DECIMAL POINT SCANNED OUTPUT AND SCAN CLOCK OUT INTERFACE INFORMATION DC 504 Scan Clock Pin 248 Plug In 70 25 ms Connector Time Slot TS TS1 Pin 25A Plug In Connector TS2 Pin 24A Plug In Connector TS3 Pin 23A Plug In Connector Pin 22A Plug In Connector TS5 Pin 21A Plug In Connector Decimal point output i goes high during the time uy slot in which the decimal Scanned is to the left of that digit Pin 27B Plug In Connector NOTE Example shown with decimal point scanned going high in TS3 will result in a display of XXX 1670 15 REV JAN 1977 REMOVED FOR OPTION 1 PARTS LOCATION GRID DC 504 MAIN BD os szzu Qs Css gt 9zzud 0450 ss KO omj ORK DERE Jam bano Sof gt Gu 9 9539 x amp nad L340 seo as Oey
65. ing source for the following stages Time Base The time base integrated circuit U160 oscillates at 1 MHz as determined by crystal Y160 or option 1 crystal Capacitor C172 permits the oscillator to be set to exactly 1 MHz If an external clock is to be used then the internally located Osc Int Ext switch S160 shown on the Controls Connector and Interface Information foldout is set to Ext and the external clock signal is connected to pin 14A of the plug in connector A shielded cable must be connected from the E O solder point near pin 14A to the E O solder point near U160 The 1 MHz oscillator signal is decade divided by U160 to produce the gate signal for the counter timer The division factor for the gate signal is selected by placing the appropriate voltage levels on pins 11 through 14 of U160 see Table 5 1 In rpm mode the output of U210 is supplied via emitter follower Q210 to the FUNCTION switch in place of the normal time base output signal Since the signal supplied to the FUNCTION switch from Q210 is six times longer than the normal time base signal the counter measures a frequency that is six times higher This results in cycles per minute rpm rather than cycles per second if the decimal point is mentally shifted The Operating Instruc tions section in this manual contains further rpm informa tion 51 Circuit Description DC 504 Table 5 1 5 a ie 01
66. input sensitivity of the DC 504 signal sources and coaxial cables providing the input to the counter timer must be terminated in their characteristic impedances if fast rise time signals such as square waves are used as inputs Otherwise the im pedance mismatch will cause reflections or ringing along the input coaxial cable The undesired ringing peaks may be of a large enough amplitude to trigger the DC 504 and the reading obtained will be an integer multiple of the actual input frequency In addition the reading may vary by integer factors as the TRIGGER LEVEL control is rotated See Fig 1 5 for examples SETTING SLOPE AND LEVEL The Trigger circuit responds to the positive going transition of the input signal for both frequency and period functions The TRIGGER LEVEL control allows the operator to move the hysteresis window of the trigger circuit to an optimum level on the input signal to ensure stable triggering See Fig 1 6 The TRIGGER LEVEL control adjusts over a nominal 1 5 V range of the input signal wider range is desirable use ac input coupling or attenuate the input signals use a 10X probe or attenuator REV C MAR 1980 Operating Instructions DC 504 2 T Trigger circuits operating Trigger circuit output shows cleanly Display correct triggering on the ringing peaks Signal at DC 504 input same as in A but improperly terminated C Common
67. kHz 0000 FREQUENCY 10 Hz 00 kHz 1Hz 000 1Hz 0000 TOTALIZE EVENTS _ 2 0 10 ms 00 SEC 1ms 000 PERIOD ms 0000 mSEC 10 us 00 1us ___ 000 3 Check Triggering a Set the following controls SG 503 Frequency 2 MHz Amplitude Multiplier 1 Output Amplitude 27 DC 504 DISPLAY TIME FUNCTION FREQUENCY MHz 1 kHz RESOLUTION TRIGGER LEVEL cw SOURCE EXT All internal switches except the Input Coupling switch Internal Input Coupling switch Down position DC up position b Turn DC 504 TRIGGER LEVEL knob ccw until display changes from 000 to 001 Slight rotation about the trip point will cause the display to change between 000 and 001 c CHECK That the index on the TRIGGER LEVEL knob is pointed toward the top of the DC 504 and is approximately centered when at thc trip point 2 6 d Connect the SG 503 Output to the DC 504 INPUT through a coaxial cable and a 50 0hm terminator The terminator should be placed at the DC 504 end of the cable e Turn the DC 504 TRIGGER LEVEL knob fully cw f CHECK That the DC 504 is not triggered display should be 000 g Turn the DC 504 TRIGGER LEVEL knob fully h CHECK That the DC 504 is not triggered display should be 001 i Remove the SG 503 Output from the DC 504 INPUT 4 Check Display Time Interval a Set the following controls DC 504 DISPLAY TIME ccw FUNCTION FREQUENCY MHz 1 kHz RESOLUTION All internal switches Dow
68. l and the DC 504 front panel controls set as follows FUNCTION MHz 1 kHz RESOLUTION SOURCE EXT DISPLAY TIME midrange TRIGGER LEVEL midrange In waveforms ground reference is the center horizontal graticule line T TT TT T k i 20us 10ms t 20 5 T 2ms 2 2ms INPUT OUTPUT ASSIGNMENTS FOR PLUG IN REAR INTERFACE CONNECTOR Meisn Maximum Recom Output ouput pm mendea active Pw mended Remarks ose tere Input Input Corel Remarks counta sm as n a put Tine Tux to slop ust sok TOTALE E tow srampSTOR feta open input Nomina Decimal Point 025 me um Migh E E m Seanned Output Input 9 TTL or n transistor to sink siens 15 mA SO Select Output Nominal T Big nomi vm Seon Nominal aT mgh Overtow output 23 Nomina P Wie Pune t
69. leaning the switch contacts Care should be taken to keep the alcohol away from the lubricated switch detents so that the lubricant is not removed or spread where it is not wanted After cleaning normally lubricated contacts can be relubricated with a no noise lubricant Tektronix Part No 006 0442 00 Use this lubricant sparingly and keep it off the IC sockets CAUTION Use only the lubricant recommended 41 Section 5 DC 504 CIRCUIT DESCRIPTION BLOCK DIAGRAMS Two block diagrams are provided A simplified block diagram that shows the relationship of the circuitry on Diagram 1 with that of Diagram 2 is placed on the apron of Diagram 1 A detailed block diagram that shows the relationship of the various functions within the instrument is given on a separate foldout INPUT DIAGRAM 1 Input Fixed Attenuation and Input Protection Events to be counted or timed are applied to front panel INPUT connector J100 or to plug in connector 50 Q nominal impedance Pin 16A Front panel SOURCE switch S100 selects which input is fed to the amplifying and shaping circuits Internal Input Coupling switch S102 shown on the Controls Connector and Interface Infor mation foldout allows the user to select either dc coupling or ac coupling C102 is used to block out the dc voltage The signal is then fed to a frequency compensated attenuator R106 R108 which has 1 input resistance The fixed attenuator provides current li
70. loading 1 MHz bandwidth or adjustment greater bnc connector Power Module Provide voltages currents and All steps Tektronix TM 504 connections suitable for TM 500 Series test equipment Plug in Extender Must make connections between All steps Tektronix Part No the DC 504 can be operated outside the Power Module DC 504 and Power Module so that 067 0645 02 1 MHz output accurate to within 2 parts in 10 1 part in 10 for Option 1 Frequency Standard Hewlett Packard Model 105A B Frequency check and adjustment Measure 0 to 15 volts accuracy within 3 Voltmeter Measure power Tektronix DM 501 supply voltages REV C JAN 1977 3 1 Adjustment DC 504 5 V Test Point 1670 07 Fig 3 1 Test point and adjustment locations 2 Check Power Supplies see Fig 3 1 a Connect the voltmeter between the 5 volt test point and ground b Check that the voltage is 5 volts within 5 c Check the voltmeter between the 12 5 volt test point and ground d Check for a voltage of 12 5 volts 0 5 volt 3 Check and Adjust Time Base Frequency a Connect the DC 504 1 MHz 5 MHz for Option 1 time base reference and the frequency standard to the oscilloscope as shown in Fig 3 2 Adjust the oscilloscope to display several complete cycles b Observe the rate of horizontal drift of the displayed waveform
71. miting overload protection for the DC 504 High Impedance Amplifier A source follower consisting of Q110A and Q110B presents a very high impedance to the source and drives the succeeding circuitry from a low impedance Q110A and Q110B are a matched pair of junction field effect transistors so matched that the quiescent output is at zero volts The output of the source follower drives a high frequency cascode amplifier consisting of Q114 and Q130 Front panel TRIGGER LEVEL control R125 varies the bias on Q130 providing a variable dc offset to the input signal This offset capability allows the DC 504 triggering point on the input signal to be selected If the TRIGGER LEVEL control is rotated fully ccw Q130 will be saturated making its output independent of its input This condition of Q130 may be useful as a manual gate control in the Totalized Events mode Input and High Frequency Signal Shaping and Schmitt Trigger The output of the cascode amplifier is connected through emitter follower Q134 to the input of Schmitt trigger circuit Q140 and Q150 The Schmitt trigger produces jitter free triggering for input signals having slow rise and fall times The hysteresis width of the Schmitt trigger is designed for an overall sensitivity of 20 mV rms 56 6 mV peak to peak This 20 mV window can be positioned over a nominal 1 5 V range with the TRIGGER LEVEL control The output of the Schmitt trigger is a low impedance TTL compatible driv
72. n allows the DC 504 to be used as an rpm counter in the FREQUENCY positions of the FUNCTION switch By moving the RPM switch to RPM the gate times of the DC 504 are lengthened by a factor of six so that the longest gate time becomes 1 minute giving a counts per minute or rpm function The decimal pointis erased from the display in the rpm measurments to indicate that rpm rather than FREQUENCY is the selected function and to facilitate the use of transducers with other than 1 pulse per revolution Table 1 1 should be used to interpret the DC 504 front panel markings and the rpm display readings Table 1 1 FUNCTION Switch RPM RPM Read display FREQUENCY RESOLUTION Gate Time Resolution number as k MHz 1 kHz 6ms 10 000 rpm X10 000 MHz 1 kHz 60 ms 1 000 rpm X1 000 kHz 10 Hz 6s 100 rpm X100 kHz 1Hz 10 10 kHz Hz 60sorim 1 rpm 1 Assumes that transducer produces 1 pulse per revolution If transducer produces 10 pulses per revolution readings will be increased by a factor of 1 DISPLAY TIME control setting about 0 1 s minimum will effectively swamp out this short gate time REV C MAR 1980 TOTALIZING In the Totalize Events mode signal events applied to the INPUT are counted and the accumulated total is displayed until the reset button is pushed or the FUNC TION switch is changed to another position This mode is a manual analog of the frequency mode Its main applica
73. n position except Input Coupling switch Internal Input Coupling switch DC up position b CHECK Rapid blinking of COUNTING light Turn the DISPLAY TIME knob slowly to cw position but not in detent d CHECK That the COUNTING light blinks progressively slower until at the full cw position COUN TING light blinks approximately every 8 to 10 seconds e Set the DISPLAY TIME knob to detent f CHECK COUNTING light stays off REV C JAN 1977 5 Check Decade Counters a Set the following controls Specification and Performance Check DC 504 6 Check Internal Switch Functions Optional Only those functions that are used should be checked a Set the following controls DC 504 DISPLAY TIME ccw FUNCTION TOTALIZE EVENTS TIRGGER LEVEL Midrange SOURCE EXT All internal switches except Input Coupling switch Down position Internal Input DC up position Coupling switch TG 501 Variable Timing In Marker sec 5s DC 504 DISPLAY TIME FUNCTION TRIGGER LEVEL SOURCE All internal switches except Input Coupling switch Internal Input Coupling switch cow FREQUENCY kHz Hz RESOLUTION Midrange EXT Down position DC up position b Connect the TG 501 Marker Out to the DC 504 INPUT through a coaxial cable and a 50 ohm terminator c Adjust the DC 504 TRIGGER LEVEL so that the first digit least significant digit LSD starts counting d Push the RESET button and release e
74. o the first order to provide a temperature stable power supply Q428 protects the supply in the event the output is shorted by limiting the current demanded from the supply under excessive load This is accomplished by having Q428 monitor the supply current through R427 Section 6 DC 504 REPLACEABLE ELECTRICAL PARTS PARTS ORDERING INFORMATION Replacement parts are available trom 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 it 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 _ first added at this serial number 00X Part removed after this serial number ITEM NAME In the Parts List an Item 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
75. ou 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 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 00x 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 parts list is indented to indicate item ion system This mecha relationships Following is an example of the indents used in the description column 12345 Name 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 at
76. play counter units interval latch over ride or at the end of the count norm osc INT EXT Oscillator A two position switch that whether the clock signal for the DC 504 is from the internal oscillator or from an external clock that is connected to Pin 14A of the plug in connector LATCH OVER RIDE NORM Input Coupling A two position switch that N RPM A two position slide switch that in the RPM osition allows the REQUENCY positions of the FUNCTION switch to be used for events per minute measurements whether the or dc coup attenuator Fig 1 3 Internal switch locations REV C JAN 1977 Operating Instructions DC 504 Display Readout LED readout five 7 segment digits with automatically placed decimal point The leading zeroes are sup pressed unless an ove flow is indicated OVERFLOW Indicator LED indicates overflow of leading digits when readout attempts to display more than five OVERFLOW COUNTING COUNTING Indicator Lights during the active counting gating interval digits DISPLAY TIME FUNCTION FREQUENCY TOTALIZE PERIOD DISPLAY TIME Control lt EVENTS FUNCTION Switch Variable control centric with FUNCTION iz Selects measurement switch sets the length of modes for counter timer time the reading will be selects the counting displayed after the count
77. r to the installation section of the power module manual 2 Remove the left side cover from the DC 504 and set the group of three slide switches to their down positions Set the single slide switch coupling to its upper DC position Replace the cover 3 Install the DC 504 and all TM 500 Series test equip ment into the power module s 4 Connect the power module s and test equipment to a suitable line voltage source Turn all equipment on and allow at least 30 minutes for the equipment to stabilize 5 Set the following DC 504 controls DISPLAN TIME cow FUNCTION TOTALIZE EVENTS TRIGGER LEVEL cw SOURCE EXT REV C JAN 1977 PERFORMANCE CHECK PROCEDURE 1 Check Display a Push DC 504 RESET button and hold in b CHECK For a display of 88888 and all segments have approximately the same intensity c Release the RESET button d CHECK For a display of 0 NOTE The COUNTING light is continuously on when in the TOTALIZE EVENTS mode 2 Check Function Switch a Set the following controls DC 504 DISPLAY TIME FUNCTION FREQUENCY MHz 1 kHz RESOLUTION TRIGGER LEVEL Fully cw SOURCE EXT All internal switches except the Input Coupling switch Inte Input Coupling switch Down position DC up position 25 Specification and Performance Check DC 504 b Check the switch functions and display in the following chart FUNCTION RESOLUTION DISPLAY 1 kHz 000 Nie
78. s 1 s 0 5 s 0 1 s 50 ms Steps 5 6 and 9 TG 501 Time Mark Generator 10 ms 5 ms 2 ms 0 5 ms 0 1 ms Generator or and 50 accurate within 0 1 equivalent 2 1 MHz Frequency Standard Output frequency of 1 MHz accurate within 2 parts in 10 1 part in 10 for Option 1 Steps 7a and 7b Hewlett Packard Model 105 or equivalent v For best accuracy the frequency standard used should be calibrated immediately before making this performance check 24 REV C JAN 1977 Specification and Performance Check DC 504 Table 2 3 cont Description Performance Requirements Application Example 50 Q Feed through Tolerance 2 bnc connectors Steps 3 5 6 Tektronix Part No Termination B and 9 011 0049 01 or equivalent 600 Q Feed through Tolerance 2 bnc connectors Step 8 Tektronix Part No Termination 011 0092 00 or equivalent 50 Q Coaxial Length 42 inches bnc connectors Steps 3 5 6 7 Tektronix Part No Cable 8 and9 012 0057 01 PRELIMINARY PROCEDURE NOTE The performance of this instrument can be checked at temperatures between 0 C and 40 C Make adjustments at a temperature between 20 C and 30 68 F and 86 F 1 Ensure that the correct nominal line selector block has been installed on the line selector pins on the power module interface board and the regulating range selected includes the applied line voltage Refe
79. sses through a diode OR gate CR257 CR245 CR246 and is buffered by Q260 and Q264 The pulse signal available at the output of Q264 is the LATCH signal used for the DCU The high output now available at pin 11 of 2200 is also inverted by U215C and used to close the gate U220C forcing the output of U220C high regardless of the input signal to the counter When pin 9 of U217 went low due to the second rising edge from the time base Q185 was turned off Q185 turning off allowed timing capacitor C190 to start charging toward 5 V through R187 and R190 the front panel DISPLAY TIME control After a period of time which is determined by the setting of the DISPLAY TIME control C190 reaches a sufficient voltage level to fire unijuction transistor Q195 C190 now discharges through Q195 and R195 causing Q198 to turn on Q198turning on generates a CLEAR signal that resets U217 and clears the DCU The U160 dividers for the gate control are reset to all nines after the gate signal has occurred by applying a positive pulse to pin 7 of U160 This reset allows the DC 504 counting cycle to restart immediately following a reset or a clear pulse If the 0160 dividers were not reset to all nines the delay before the next count could begin would be equivalent to one gate time interval The nines reset pulse to pin 6 of U160 is stretched by C205 to make sure that all other counter circuits have been released from their clear pulses before the counter starts
80. t No Eff Dscont Name amp Description Mi Part Number _ R195 315 0100 00 8010100 8036568 RES FXD CMPSN 10 5 0 25 57668 _ NTR25J E 1060 195 315 0200 00 8036570 RES FXD CMPSN 20 5 0 25 01121 CB2005 R198 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 57668 NTR25JEO1K0 R200 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 57668 NTR25JEO1K0 R203 315 0512 00 RES FXD CMPSN 5 1K 5 0 25 57668 NTR25J E05K1 R204 315 0103 00 RES FXD CMPSN 10K OHM 5 0 25W 57668 NTR25J E10KO R205 315 0272 00 RES FXD CMPSN 2 7K 5 0 25 57668 NTR25J E02K7 R206 315 0512 00 8 036570 RES FXD CMPSN 5 1K OHM 5 0 25W 57668 NTR25J E05K1 R207 315 0103 00 RES FXD CMPSN 10K 5 0 25 57668 NTR25J ETOKO R208 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 57668 NTR25JEO1KO R210 315 0103 00 RES FXD CMPSN 10K 5 0 25 57668 NTR25J E10K0 R212 315 0362 00 RES FXD CMPSN 3 6K OHM 5 0 25W 01121 CB3625 R215 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 57668 NTR25J E05K1 R220 315 0102 00 RES FXD CMPSN 1K 5 0 25 57668 NTR25JE01K0 R225 315 0512 00 RES FXD CMPSN 5 1K 5 0 25 57668 _ NTR25J E05K1 R226 315 0102 00 RES FXD CMPSN 1K 5 0 25 57668 NTR25JE01K0 R227 315 0512 00 RES FXD CMPSN 5 1K 5 0 25 57668 NTR25J E05K1 R230 315 0512 00 RES FXD CMPSN 5 1K 5 0 25 57668 NTR25J EOSK1 R232 315 0101 00 RES FXD CMPSN 100 OHM 5 6 0 25W 57668 NTR25J E 100E R235 315 0102 00 RES FXD CMPSN 1
81. t lines LED cathodes low while at the same time the anode voltage enable transistors Q350 Q355 Q360 Q365 and Q370 apply high levels to the appropriate LED digit lines anodes U320 has a zero blanking feature that in combination with U260B and U315B provides leading zero suppres sion blanking for the DC 504 display When one of the inputs to OR gate U315A goes high its output goes low setting pin 9 of U260B high The high at pin 9 of U260B is applied to a diode OR gate CR320 and CR322 whose output forces pin 5 of U320 high In this condition all input digits will be displayed no zeros will be blanked The conditions that can cause a low at the output of U315A are a Time slot 5 LSD is high LSD is always dis played in Totalized Events mode even if zero b Thedecimal point is high all zeros to the right of the decimal point are displayed C Overflow has occurred 54 The leading zero suppression circuit is reset to the blanking state by the leading edge of time slot 1 through a differentiator circuit C325 and R325 feeding the direct clear input pin 13 of U260B This will cause 5 of U320 to be held low by R322 and any zero digit at the input to U320 will result in a blank display If a zero digit is sensed and blanked by 0320 it responds by outputting a low level on pin 4 This low is recycled to U260B on the next scan clock pulse to allow subsequent zeros to be blanked If however a high non
82. taching parts Attaching parts must be purchased separately uniess otherwise specitied ITEM NAME In the Parts List an Item Name is separated from the description by a colon Because of space limitations 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 ACTUATOR ELCTLT ELECTROLYTIC ADAPTER ELEM ELEMENT ALIGN ALIGNMENT EPL ELECTRICAL PARTS LIST AL ALUMINUM EQUIPMENT ASSEM ASSEMBLED EXT EXTERNAL ASSY ASSEMBLY FIL FILLISTER HEAD ATTEN ATTENUATOR FLEX FLEXIBLE AWG AMERICAN WIRE GAGE FLH FLAT HEAD 80 BOARD FLTR FILTER BRKT BRACKET FR FRAME or FRONT BRS BRASS FSTNR FASTENER BRZ BRONZE FT FOOT BSHG BUSHING FXO FIXED CABINET GSKT GASKET CAP CAPACITOR HANOLE CER CERAMIC HEX HEXAGON CHAS CHASSIS HEXAGONAL HEAD CIRCUIT HEX SOC HEXAGONAL SOCKET COMPOSITION HLCPS HELICAL COMPRESSION CONN CONNECTOR HLEXT HELICAL EXTENSION cov COVER HIGH VOLTAGE CPLG COUPLING INTEGRATED CIRCUIT CATHODE RAY TUBE 10 INSIDE DIAMETER DEG DEGREE IDENT IDENTIFICATION DRAWER IMPLR IMPELLER INCH SINGLE END INCAND INCANDESCENT SECT SECTION INSUL INSULATOR SEMICOND SEMICONDUCTOR INTL INTERNAL SHLO SHIELD LPHLDR LAMPHOLDER SHLOR SHOULDERED MACH _ M
83. ter U310 and gate U315B The purpose of U315B is to guarantee that only a single high is circulated in the shift register after the DC 504 has completed a single start up scan It does this by feeding lows into the shift register as it sequences as long as a high exists in any time slot except the last least significant digit position The shift register time slots which control what display digits will be energized and which latch will have its count gated out scan from the most significant digit MSD pin 15 to the least significant digit LSD pin 10 The time slots are available on the plug in connector pins as digit select outputs Power Inverters Anode Voltage Enable and Decimal Point The time slot outputs from the time slot decoder are buffered by high current inverters U325D U325E U325F U325A and U325B and then used to enable the anode voltage supply transistors Q350 Q355 Q360 Q365 and Q370 The decimal point is positioned in the proper time slot by the cam switch Inverter U325C provides the proper decimal point logic levels forthe plug in connector output and for leading zero blanking The scanned decimal point belongs decimal point appears to the left of the digitthat is active when the decimal scan goes high Seven Segment Decoder Suppression and Leading Zero The seven segment decoder U320 decodes the bcd information used to drive the seven segment display LED U320 pulls the appropriate LED segmen
84. test and do not include test equipment error Limits and tolerances in this procedure are instrument performance requirements only if stated as such in the Specification section of this instrument manual TEST EQUIPMENT REQUIRED The following test equipment or equivalent is required to perform the performance check Test equipment characteristics listed are the minimum required to verify the performance of the equipment under test Substitute equipment must meet or exceed the stated requirements All test equipment is assumed to be operating within tolerance Special test devices are used where necessary to facilitate the procedure Most of these are available from Tektronix Inc and can be ordered through your local Tektronix Field Office or representative Table 2 3 LIST OF TEST EQUIPMENT REQUIREMENTS Example Description Performance Requirements Application Power Module Provide power for DC 504 and other TM 500 Series test equipment used in this procedure All steps TM 504 or equivalent Medium Frequency Sine wave Generator Output frequencies of 2 MHz 15 MHz 50 MHz and 80 MHz with variable p p output amplitude from from 56 mV to 2 7 V Steps 3 and 8 SG 503 Leveled Sine Wave Generator or equivalent Low Frequency Output frequency of 10 Hz with a p p Step 8 SG 502 Oscillator Sine wave output amplitude of 56 mV or equivalent Generator Time Mark Marker output
85. the next counting cycle The output of U160 occurs at pin 1 U180A syn chronizes U160 s output with the 1 MHz clock to reduce jitter The time base output is then fed to RPM switch S210 In the Norm normal counter operation switch position the time base output runs directly to the FUNCTION switch and is connected to the proper circuit depending on the setting of the FUNCTION switch In the PERIOD mode synchronizer U180A is by passed since time base jitter is not significant at low frequencies Also the RPM Switch is by passed since the RPM mode applies to frequency measurements only When S210 is set to the RPM position the output of U180A is sent to the divide by six circuit consisting of U210 This unique divide by six circuit can be set to its maximum count essentially five by pulsing pin 7 of U210 through Q204 This allows U210 to be set to its maximum count at the same time U160 is set to all nines its maximum count The advantage of doing this maximum count resetting has been prevously explained When Q198 goes low CLEAR Q200 is forced high after a delay determined by the rc network in its base circuit Then when CLEAR is released Q200 goes low after another delay The Q200 signal is used to reset the time base to all nines and the delay in going low ensures that the time base is the last part of the circuitry to be released from the clear DECADE COUNTER UNITS DIAGRAM 2 The input to the decade counter units DCU
86. unding conductor in the power cord is essential OCT 1980 DC 504 Fig 1 1 The DC 504 OCT 1980 Section 1 DC 504 OPERATING INSTRUCTIONS INSTRUMENT DESCRIPTION The DC 504 Counter Timer measures frequency from 0 1 Hz 0 Hz with 0 1 Hz resolution to at least 80 MHz It measures period from 1 us to 999 99 s and totalizes events from 0 to 99 999 at a maximum rate of at least 80 MHz A resolution of 0 1 Hz can be obtained by allowing the more significant figures of the counter to overflow Five 7 segment light emitting diodes LED provide a highly visible numerical display The decimal point is automatically positioned and leading zeros to the left of the most significant digit or decimal point are blanked Digit overflow is indicated by a front panel LED Signals to be counted or timed can be applied to either a front panel bnc connector or to the rear interface connector The DC 504 designed to operate in any of the TM 500 Series Power Modules It is completely compati ble with other members of the TM 500 family in terms of signal interconnections The 504 is designed to operate in ambient temperatures between 0 C and 50 It can be stored in temperatures ranging from 40 C to 75 C After storage in temperatures outside the specified operating temperatures allow the DC 504 to return to a room ambient temperature within the operating range before applying power PREPARATION FOR

Tektronix Pill Reminder Device DC 504 User's Manual

Contents

Download Pdf Manuals

Related Search

Related Contents