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1. T M nts E i UH PARTS LOCATIO a R786 R785 R784 R783 R782 R780 La E RET LOCATION GRID 084 2942 9842 692 3 q S290 1v6H2 182 L 6H2 v6HO vv6HO togu 256 956112 07650 66 54 526 4 5950 1984 13 05797 05810 05820 MAIN BOARD BACK CKT GRID NO Loc DISPLAY BOARD DISPLAY BOARD SN 010879 amp BELOW SN B010880 amp ABOVE LATCH Z 5 FROM 831 Te re RGOS ue TRIGGER el 040 44 3k 4 UGIOA 2 747 CLEAR 215315 8 0587 3 2 RGSS 06578 e BIO 7400 55 IDo 5 UGS7C A CRGIS gt 4 0755 13 7 w a 27k USGOB I3 C668 555 U655 3k 5596 rea T4504 5 Dcu RESET R c372 7403 uen U620C 08 eae 7400 3 Blo eke potet IM E Reas 20 55 422 5 1 7400 2002 i 57 ROT 9 42 SEE PARTS LIST FOR EARLIER eR VALUES AND SERIAL NUMBER RANGES OF PARTS OUTLINED RESET OR DEPICTED IN GREY e 8570 5195 1 MAIN BOARD 1484 14 DC 505A REV B
2. 163 510 PART OF 3195 FUNCTION mo A2 TRIGGER BOAR D 1984 12 DC 505A B AUG 1977 R435 gt Q435 R440 CR433 bok gt nase 6446 5 2441 0585 5655 U587A 7437 gt 3 4 7 CLEAR LATCH 9 2 7 7437 ZX cr567 s lt BOARD Al MAIN BOARD MCIOIOS 25195 1 5 QUIS Uaa1c MC 10102 68 SEE PARTS LIST FOR EARLIER 0105 VALUES AND SERIAL NUMBER na RANGES OF PARTS OUTLINED OR DEPICTED IN GREY DEH 0774 GATE AND Logic Divioer Reset 3 1 8 0825 13538 HaqiAIq 9 251901 IOHLNOD ALYY MAIN BOARD BACK AND DISPLAY BOARD DC 505A INSTALL FOR REMOVE FOR 3 BACK OF 5 26 27 28 5 26 127 28 N e N 18 8 19 20 21 22 2 24 15 16 17 i 12 13 4 15 161 12 13 1 10 m n 718779 7 18 9 CR25 REV B AUG 1978 EE EE DISPLAY BOA OPTION 1 ONL Y OPTION 1 D MAIN BOARD pentes M 5
3. 4 94250 SEE PARTS LIST FOR EARLIER 80 VALUES AND SERIAL NUMBER RANGES OF PARTS OUTLINED OR DEPICTED IN GREY 01s 9 5 15 FREQ A tos RATIO A B PERIOD B TIME A B WIDTH B EVENTS A DURING B TOTALIZE A or FUNCTION 5185 FUNCTION INDICATES CONTACT CLOSED 8 Time Base Phase Lock Loop Fomr ano Parameter Mateix LESS 1 4 I 425 7497 vseze 25828 Al MAIN BOARD R35 u7eoc q UTGOA 7 8 5 lok R477 847 R976 iok gt 15A REFER TO MAIN CIRCUIT BOARD PARTS LOCATION GRIP 5 ed v DEH 077 R446 R45 245 R458 XIH L VIN 8 Ld 339 3 4001 3201 35 144 ISYA OPTIONAL OSCILLATOR 5v 2 vaol 270 Yao 74405 4 5 Yaoo 1 i 7400 5v uqoop uqooc caos 7400 7400 19 197 4 TO Ch646 i e wd 5V 5v 0 r890 a 902098 Belk 27 s 5 13 1 5 1 rea 5 55 1 o 4 U7G65B 7474 lt 3 5v 22895 5895 3 5895 2 5895 1 5v 4 b b CRAZ R912 K Bole 5V 2914 19 7404 14 Suk
4. H 2 TRIGGER BOARD 3235 P 4 7 a Pt 57 gt 02000 Laas 2 200nH 245 MENTE uu 150 LJ x R212 5 06 356 VV RS R2623 paca 8 3 0 C268 2 4 Mo 3 Rz MEFS 02 que lt 29 290 ROB A RI 0280 BAY 2 D 7 K 2 P256 3 VA R290 Ries RIG 8276 9252 25 we 2222 24 sak R284 5 575 iov V 5 10v 210 ON LEVEL CONTROL nsa R255 i 100 Sy R252 52 55 5 j C2 o gt 5 2 2 1 238 57 R240 2 Q242 R248 Q240 lt 300 44 C240 346 R242 24 so PP 159 C245 5 45 5 siss ax 5 i criss 7 Rias u a me i 5V Riez cias 2 5 59 64 85 cise V VRICS x 3k 2154 33 1 8 5 5 T 249 RiTo Rico Acres 70 3 Piso 2 CRISA icc ries VA SV ne eg S ik eso ok rigo R157 4 mae TUS Q72 47 iov esv lov 100 ON LEVEL CONTROL Riss R145 LEVEL OuT BOARD 180 LEVEL ADJUST 5 2142 sosa
5. 2 Part N 3 Tektror of the interna accura better 5 with a DC 505A TEST EQUIPMENT REQUIRED The following test equipment and accessories or equivalent is required for complete adjustment calibra tion of the DC 505A Specifications listed are the mini mum necessary for adjustments or measurements All test equipment is assumed to be correctly calibrated If other test equipment or accessories are substituted control settings or adjustment setup may need to be altered to meet the requirements of the equipment used Detailed operating instructions for the test equipment are not given in the adjustment calibration procedures Refer to the instruction manual for the test equipment if more information is desired 1 TM 500 Series Power Module 2 TM 500 Heavy Duty Plug in Extender Tektronix Part Number 067 0645 02 3 Digital Multimeter Input resistance 10 MQ Tektronix DM 501 4 1 MHz Frequency Standard The over all accuracy of the standard used will determine the accuracy of the internal time base adjustment For maximum obtainable accuracy adjustment the frequency standard should be better than 2 parts in 10 1 part in 10 for Option 1 5 Leveled Sine Wave Generator Tektronix SG 503 with accessory cable 6 Pulse Generator Output amplitude adjustable from 5 V to 5 V Output pulse risetime one nanosecond or less Tektronix PG 502 with accessory cable 7 Real time a
6. 10 DCU ann LATCHES AND OVERFLOW OSH 174 01 01 vI noq 2 5 6 5 tls x LSD 1 a 4 4 QU ee ees 143 2 DS796 le 7 9 SEL m 7 10 D5800 F l 11432 tO 5 t us 1 poc 4 ae eo 55626 25 5 25826 25827 DS 82 5 ns DISPLAY BOARD SNPOIOS79 4 BELOW SCAN 215 5 R740 Belk INTERNAL SCAN CLOCK o 27A DISABLE B 744 e R742 8746 2 4 2 46 C74 UGSOF 7404 245 2806 SCAN CLOCK OUT Oc 05A 5 7508 U7I58 5 1 uusok Il Al MAIN BOARD 5 11 0755 74145 N R755 200 55 027 R757 750 lt 757 100 25 j lt 7 a384 cR178 98478 209481 lt 4487 1 i i 1 4 2 TRIGGER BOARD 8 4 9 1484 15 REVB AUG 1976 OVERFLOW 4 sv 9 RTS 246 87 J 10A 5V Sk 108 5 UTISA 3 25 V 7404 19 R7
7. 151 0342 00 151 0342 00 151 0190 01 151 1042 00 151 0438 00 151 0427 00 151 0438 00 151 0427 00 151 0427 00 151 0427 00 151 0342 00 151 1042 00 151 0438 00 151 0427 00 151 0438 00 151 0427 00 151 0427 00 151 0427 00 151 0342 00 151 0342 00 REV B AUG 1977 e 3 2 r rl 1 1 e 1 Replaceable Electrical Parts DC505A 9 Tektronix Serial Model Mfr Ckt No Part No Eff Dscont Name amp Description Code Mfr Part Number Q420 151 0220 00 TRANSISTOR SILICON PNP 80009 151 0220 00 9430 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q435 151 0220 00 TRANSISTOR SILICON PNP 80009 151 0220 00 0440 151 0220 00 TRANSISTOR SILICON PNP 80009 151 0220 00 0445 151 0220 000 TRANSISTOR SILICON PNP 80009 151 0220 00 0450 151 0220 00 TRANSISTOR SILICON PNP 80009 151 0220 00 0455 151 0220 00 TRANSISTOR SILICON PNP 80009 151 0220 00 480 151 0341 00 TRANSISTOR SILICON NPN 07263 5040065 Q4851 151 0504 00 010100 010879 TRANSISTOR SILICON N CHAN UNIJUNCTION 04713 2N4851 04851 151 0504 01 010880 TRANSISTOR SILICON N CHAN UNIJUNCTION 04713 50309 4852 151 0504 00 010100 010922 TRANSISTOR SILICON N CHAN UNIJUNCTION 04713 2N4851 04852 151 0504 01 010930 TRANSISTOR SILICON N CHAN UNIJUNCTION 04713 50309 9490 151 0341 00 TRANSISTOR SILICON NPN 07263 5040065 0506 151 0367 00 TRANSISTOR SILICON NPN SEL FROM 3571 80009
8. 96 97 98 100 101 102 103 104 105 106 107 108 109 110 111 112 Tektronix 200 1332 00 210 0406 00 214 1704 01 214 1127 00 105 0516 00 354 0219 00 401 0155 00 210 0406 00 401 0156 00 214 1962 00 354 0165 00 386 2709 00 210 0405 00 210 0001 00 210 1008 00 384 1242 00 384 1160 01 376 0156 00 214 1126 01 214 1127 00 105 0504 00 351 0355 00 131 0604 00 131 0608 00 136 0252 04 136 0260 02 136 0269 02 136 0269 022 214 0579 001 214 0579 002 361 0382 00 34470134700 210 1014 002 198 3030 001 8010630 131 0707 00 175 0828 00 352 0163 05 198 3033 002 8010660 131 0707 00 175 0828 00 352 0163 05 384 1136 00 214 1061 00 22670725593 211 0038 001xB010950 211 0038 00 xn010970 211 0038 002xB010774 lstandard only 2option 1 only Option 4 only REV B AUG 1977 Serial Model No Part No Eff Dscont FP 1 N N 128 O Qty 12345 Replaceable Mechanical Parts DC505A Name amp Description ACTUATOR ASSY INCLUDES COVER CAM SW NUT PLAIN HEX 4 40 X 0 188 INCH BRS SPRING FLAT CAM SW DETENT 0 008 INCH THK ROLLER DETENT 0 125 DIA X 0 125 INCH L DRUM CAM SWITCH ATTACHING PARTS RING RETAINING FOR 0 25 INCH SHAFT c BEARING CAM SW FRONT NUT PLAIN HEX 4 40 X 0 188 INC
9. FXD CMPSN 39 OHM 5 0 25W 01121 83905 R290 315 0511 00 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 R295 315 0151 00 RES FXD CMPSN 150 OHM 5 0 25W 01121 1515 R2981 315 0152 00 010100 010299 RES FXD CMPSN 1 5K OHM 5 0 25W 01121 1525 R2981 315 0132 00 010300 RES FXD CMPSN 1 3K OHM 5 0 25W 01121 81325 2982 315 0152 00 1 010100 801329 RES FXD CMPSN 1 5K OHM 5 0 25W 01121 1525 R298 315 0132 00 8010330 RES FXD CMPSN 1 3K OHM 5 0 25W 01121 1325 82982 315 0152 00 010100 010297 RES FXD CMPSN 1 5K OHM 5 0 25W 01121 81525 R2983 315 0132 00 8010298 RES FXD CMPSN 1 3K OHM 5 0 25W 01121 81325 R300 315 0271 00 RES FXD CMPSN 270 OHM 5 0 25W 01121 2715 R305 315 0181 00 RES FXD CMPSN 180 OHM 5 0 25W 01121 1815 R307 315 0511 00 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 D R308 315 0820 00 RES FXD CMPSN 82 OHM 5 0 25W 01121 88205 R315 315 0511 00 RES FXD CMPSN 510 OHM 5 0 25W 01121 CB5115 R317 315 0511 00 RES FXD CMPSN 510 OHM 5 0 25W 01121 CB5115 R320 315 0511 00 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 R324 315 0751 00 RES FXD CMPSN 750 OHM 5 0 25W 01121 7515 R326 315 0561 00 RES FXD CMPSN 560 OHM 5 0 25W 01121 5615 R329 315 0273 00 RES FXD CMPSN 27K OHM 5 0 25W 01121 82735 R330 315 0273 00 RES FXD CMPSN 27K OHM 5 0 25W 01121 235 R332 315 0101 00 RES FXD CMPSN 100 OHM 5 0 25W 01121 1015 R335 315 0241 00 RES FXD CMPSN 240 OHM 5 0 25W
10. PG 506 Does not have 0502 01 Comparator output chopped feature can be alternately chopped to a refer ence voltage SG 504 replaces 067 0532 01 067 0650 00 TG 501 replaces 180 180A 181 184 2901 SG 503 Amplitude range 190B Amplitude range 40 mV 5 to 5 5 V to 10 V p p SG 503 Frequency range 0532 01 Frequency range 250 kHz to 250 MHz 65 MHz to 500 MHz SG 504 Frequency range 0532 01 Frequency range 245 MHz to 1050 MHz 65 MHz to 500 MHz TG 501 Trigger output 180A Trigger pulses 1 10 slaved to marker 100 Hz 1 10 and output from 5 sec 100 kHz Multiple through 100 ns One time marks can be time mark can be generated simultan generated at a time eously 181 Multiple time marks TG 501 Trigger output 184 Separate trigger slaved to market pulses of 1 and 0 1 output from 5 sec sec 10 1 and 0 1 through 100 ns One ms 10 and 1 us time mark can be generated at a time TG 501 Trigger output 2901 Separate trigger slaved to marker pulses from 5 sec output from 5 sec to 0 1 us Multiple through 100 ns time marks can be One time mark can generated simultan be generated at eously a time NOTE All TM 500 generator outputs are short proof All TM 500 plug in instruments require TM 500 Series Power Module REV B JUN 1978 MANUAL CHANGE INFORMATION M34427 committed to technical excellence EFF SN 8031920 ELECTRICAL PARTS L
11. TRANSISTOR SILICON NPN TRANSISTOR SILICON NPN TRANSISTOR SILICON TRANSISTOR SILICON NPN TRANSISTOR SILICON NPN TRANSISTOR 50 SA TRANSISTOR SILICON PNP TRANSISTOR SILICON PNP TRANSISTOR SILICON NPN SEMICOND DVC SE MATCHED PAIR FET TRANSISTOR SILICON PNP SEL FROM SPS6927 TRANSISTOR SILICON NPN TRANSISTOR SILICON PNP SEL FROM SPS6927 TRANSISTOR SILICON NPN TRANSISTOR SILICON NPN TRANSISTOR SILICON NPN TRANSISTOR SILICON PNP SEMICOND DVC SE MATCHED PAIR FET TRANSISTOR SILICON PNP SEL FROM SPS6927 TRANSISTOR SILICON NPN TRANSISTOR SILICON PNP SEL FROM SPS6927 TRANSISTOR SILICON NPN TRANSISTOR SILICON NPN TRANSISTOR SILICON NPN TRANSISTOR SILICON PNP TRANSISTOR SILICON PNP Mfr Code 08806 50347 08806 50347 08806 50347 08806 50347 08806 50347 08806 50347 71400 05091 98291 05091 98291 80009 80009 80009 80009 80009 80009 80009 80009 80009 80009 80009 80009 80009 04713 80009 80009 80009 80009 80009 80009 80009 80009 80009 80009 80009 80009 80009 80009 80009 80009 80009 80009 80009 80009 Mfr Part Number SSL 12 LLL 7A SSL 12 LLL 7A SSL 12 LLL 7A SSL 12 LLL 7A SSL 12 LLL 7A SSL 12 LLL 7A MTH4 31 279 051 043 0349 31 279 051 043 0349 108 0551 00 108 0337 00 108 0422 00 108 0181 01 108 0181 01 108 0509 00 108 0420 00 151 0334 00 151 0334 00 151 0334 00 151 0334 00 151 0334 00 151 0334 00 2N4441
12. amp Index Tektronix Serial Model No Mfr No PartNo Dscont Qty 12345 Name amp Description Code Mfr Part Number 1 43 384 1099 00 2 EXTENSION SHAFT PUSH BUTTON 1 54 INCH LONG 80009 384 1099 00 44 1 BOARD ASSY LEVEL OUT SEE 4 EPL ATTACHING PARTS 45 211 0514 00 1 SCREW MACHINE 6 32 X 0 750 INCH PNH STL 83385 OBD m am 46 166 0032 00 1 SPACER SLEEVE 0 18 ID X 0 313 INCH LONG 80009 166 0032 00 BOARD ASSY INCLUDES 136 0514 00 1 SOCKET PLUG IN MICROCIRCUIT 8 CONTACT 73803 9308 02 47 1 BOARD ASSY TRIGGER SEE 2 EPL ATTACHING PARTS 48 213 0336 00 4 SCR TPG THD FOR 6 32 X 1 25 INCH PNH STL 83385 085 49 361 0516 00 4 SPACER SLEEVE 0 189 OD X 0 986 LONG BRS 80009 361 0516 00 BOARD ASSY INCLUDES 50 131 0608 00 6 CONTACT ELEC 0 365 1 0 25 BRZ GOLD PL 22526 47357 51 136 0252 041 010100 B010949 222 SOCKET PIN TERM 0 188 INCH LONG 22526 75060 136 0252 041 010950 270 SOCKET PIN TERM 0 188 INCH LONG 22526 75060 136 0252 04 010100 010969 222 5 TERM 0 188 INCH LONG 22526 75060 136 0252 042 010970 270 SOCKET PIN TERM 0 188 INCH LONG 22526 75060 136 0252 043 010100 010773 222 SOCKET PIN TERM 0 188 INCH LONG 22526 75060 136 0252 043 B010774 270 SOCKET PIN TERM 0 188 INCH LONG 22526 75060 52 136 0260 02 010100 010949 13
13. 0 25W 01121 82415 R202 315 0183 00 RES FXD CMPSN 180 OHM 5 0 25W 01121 81815 R204 315 0820 00 RES FXD CMPSN 82 OHM 5 0 25W 01121 8205 R205 315 0511 00 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 R210 315 0510 00 RES FXD CMPSN 51 OHM 5 0 25W 01121 5105 R212 315 0240 00 RES FXD CMPSN 24 OHM 5 0 25W 01121 82405 R214 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 83025 R220 322 0622 01 RES FXD FILM 950K OHM 0 5 0 25W 75042 CEBTO 9503D R222 315 0510 00 RES FXD CMPSN 51 OHM 5 0 25W 01121 5105 R225 321 0360 00 RES FXD FILM 54 9K OHM 1 0 125W 91637 MFF1816G54901F R230 321 0481 00 91637 MFF1816G10003F l Fy 1 1 ee r 1 Standard only 3option 1 only 4option 4 only 3 12 REV B AUG 1977 Replaceable Electrical Parts DC505A 4 e Tektronix Serial Model Mfr No Part No Eff Dscont Name amp Description Code Mfr Part Number R232 315 0103 00 RES FXD CMPSN 10K OHM 5 0 25W 01121 CB1035 R240 315 0271 00 RES FXD CMPSN 270 OHM 5 0 25W 01121 82735 R242 315 0511 00 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 R2441 315 0391 00 XB010950 RES FXD CMPSN 390 OHM 5 0 25W 01121 3915 1 2442 315 0391 00 010970 RES FXD CMPSN 390 OHM 5 0 25W 01121 3915 2443 315 0391 00 010774 RES FXD CMPSN 390 OHM 5 0 25W 01121 53915 R246 315 0101 00 RES FXD CMPSN 100 OHM 5 0 25W 01121 1015 R248 31
14. LEVEL setting of A 2 counts applies to 10 ns clock rate only Note 4 condition satisfied see Fig 1 5 Supplemental Information Signal to noise ratio at inputs must be 240 dB TIME best absolute accuracy with averaging is 3 ns Pulse widths minimum into channel and for TIME is 5 ns N is the averaging factor 100 ps REV B AUG 1977 t 6 p Operating Instructions DC 505A TABLE 1 7 cont Characteristics Performance Requirements Supplemental Information WIDTH B time base accuracy WIDTH B best absolute accuracy Hysteresis error and trigger jitter with averaging is 1 5 ns error see Note 3 chosen time base period N ne setting of Volts B to pulse height _ Baseline to LEVEL Refer to setting of B Fig 1 5 2 counts applies to 10 ns clock rate only Note 4 condition satisfied EVENTS A DURING B Accuracy period of signal A N Hysteresis error and trigger jitter error of CH B see Note 3 Frequency of 10 ns events into A Volts LEVEL setting of B to pulse height Baseline to eee Refer to setting of B Fig 1 5 Note 4 condition satisfied NOTES 01 V 1 Trigger jitter error Goren N Ratio Period dV dt of triggering edge ei 0 005 V 0 005 V 2 Trigger jitter error Time of start edges dV dt of stop N 3 Hysteresis
15. R672 12 R927 F3 8680 42 8930 C4 F5 R684 G3 18935 F4 G5 687 G2 R975 F5 F4 R690 FA 18976 G5 G4 R692 02 977 F5 4 695 F2 R978 F5 G4 9697 979 G5 F4 R704 G1 980 F4 G4 8710 K3 9981 F4 F4 R712 R982 G5 G4 714 H2 9983 F4 R718 02 R984 F4 L4 R720 2 1985 G4 J4 R722 L1 R986 F4 J4 R724 F2 R987 F4 14 726 F1 988 5 L3 R730 12 R989 G4 K4 R732 H2 19990 F4 85 R735 12 5 R740 K2 S195 B3 J4 R742 42 5 E3 KS R744 J2 S545 B4 5 R746 H2 S575 B4 L4 R755 01 15895 F6 L4 R757 1 15900 H5 K5 R765 C1 L5 R768 010 K4 L5 R770 61 030 K4 L4 R774 M3 9610 1 K4 775 13 620 J3 K4 776 2 0625 E2 K5 777 L3 0630 8790 2 0650 H2 A4 R791 2 0652 J2 B4 R793 B4 0655 1 5 794 C3 657 K1 A796 2 0675 B5 R797 2 676 12 B5 800 2 678 H1 B4 R801 B2 679 H2 A4 806 B2 700 E2 B5 18807 B2 9715 J2 C5 R810 B2 0720 D1 K6 R811 B2 750 D2 4 R815 2 0755 C2 14 R816 B2 760 02 C4 820 2 0765 2 821 2 9780 G2 R890 43 10895 H4 E2 J4 GSE c CLEA R314 CSAS 200 usqo R395 395 288 ul 2 24 240 U3GOA 5 u34op BY ace 145 14 270 INDICATES CONTACT CLOSED INDICATES DS TENT CAM NUMBER 1 CLOSED BETWEEN DETENTS ONLY
16. R835 R837 R839 R842 R844 R847 R850 R854 R856 R860 R862 R863 R865 R867 R870 R8722 R8722 R8721 R8721 R8723 R8723 R875 R876 R880 R881 R883 R885 R887 R890 R891 R895 R8972 R8972 R8971 R8971 R8971 R8973 R9003 R9022 R9062 R9102 R912 R914 R916 R918 R919 R920 R922 Tektronix Part No 315 0102 00 315 0301 00 315 0301 00 315 0511 00 315 0511 00 315 0821 00 315 0821 00 315 0821 00 315 0821 00 315 0821 00 315 0201 00 315 0202 00 315 0391 00 315 0102 00 315 0243 00 315 0103 00 315 0103 00 315 0133 00 315 0102 00 315 0910 00 315 0511 00 315 0102 00 315 0511 00 315 0102 00 315 0511 00 315 0102 00 315 0622 00 315 0331 00 315 0511 00 315 0621 00 315 0122 00 315 0511 00 315 0512 00 315 0512 00 315 0332 00 315 0102 00 315 0201 00 315 0510 00 315 0201 00 315 0510 00 315 0201 00 315 0510 00 315 0301 00 315 0271 00 315 0181 00 315 0242 00 315 0512 00 315 0512 00 315 0512 00 315 0512 00 315 0512 00 315 0512 00 315 0102 00 loption 1 only 2standard only Option 4 only 3 18 Serial Model No Eff 010100 010630 010100 010660 010100 010643 010100 010630 010100 010660 010100 010660 Dscont 010629 010659 010642 010629 010659 010659 amp Description RES FXD CMPSN 1K OHM 5 0 25W RES FXD CMPSN 300 RES FXD CMPSN 300 RES FXD CMPSN 510 RES FXD CMPS
17. k u Ed kl k kv ki R255 TP7 CH A CH A LEVEL 100X PROBE CENTER HAL R96 CH B GAIN LEVEL OUT BOARD V C135 ADJUST CH B lt R145 TP8 CH B CH B LEVEL 100X PROBE CENTER DISPLAY 4 LINES SCAN 1MHz DATA SCAN OVERFLOW BCD OUT CLOCK CLOCK coop DISABLE SIGNAL RESET 20A 208 248 TSO 144 198 27A 23B 26A 19 218 258 25 CLOCK and 8 7 LINES 5 5 SEVEN SEGMENT DECODER amp DRIVER LEADING ZERO SUPPRESSION DISPLAY BOARD DISPLAY REGISTERS PARAMETER GATE 7 DIGIT LINES 10 TO 10 DCU s STORAGE and MOS INTERFACE CIRCUITRY ANODE VOLTAGE ENABLE 1984 8 L3 ovenriow amp DRIVE amp DISPLAY DISABLE DC 505A INVHSVIG 2018 MANUAL AVAILABLE START STOP CIRCUIT BOARD 268 CONNECTIONS 4 LINES BCD peu reser 10 DCU To MANUAL START STOP FUNCTION SWITCH N SELECTION SWITCH AL SHAPING DECIMAL SLOPE amp PARAMETER CENTRAL LOGIC DECIMAL amp PARAMETER CODE FREQA RATIO A B PERIOD B DECIMAL amp DCU TIME PARAMETER SIGNAL WIDTH B SELECT EVENTS A and GATING DURINGB jo TOTALIZE A A OR TIME SELECT CLOCK SELECT 9 RATE 5 WIDTH OR PERIOD DECIMAL amp SELECT PARAMETER SELECT T
18. n Overflow Indication Circuit When the decade counters have counted to 9 999 999 the counters are full At the next count the signal from U700 pin 8 coupled across transistor Q718 is the clock input for U720A pin 3 The signal is transferred across U720A and U610B producing a high at pin 8 turning off diodes CR726 and CR725 This supplies a high at the input of U715A which starts the multivibrator causing the LED display to flash Time Base And Clock Rate Divider A precise one megahertz clock provides the reference for operation of the gate generating and time counting circuits The output of crystal oscillator 900 is adjustable by C905 to one megahertz The four parts of U900 forma shaper buffer stage to produce square wave clock pulses and to isolate the oscillator from the 1 MHz output line Optional 1 MHz Clock Anoptional 1 MHz clock is available using a very stable 5 MHz crystal oscillator and a divide by five counter This combination is shown on the schematic as Y901 and U901 Time Base The time base integrated circuit U895 operates at 1 MHz as determined by the signal supplied by the 1 MHz clock and buffer circuitry to the external input pin 3 If an external clock is to be used then the internally located Oscillator Int Ext switch S900 is set to EXT and the external clock signal is connected to pin 14A of the plug in connector The 1 MHz oscillator signal is decade divided U895 to
19. 00 n A33 670 2888 01 B010930 CKT BOARD ASSY DISPLAY 80009 670 2888 01 A4 670 4227 00 CKT BOARD ASSY LEVEL OUT 80009 670 4227 00 51 670 5082 00 010950 BOARD ASSY REGULATOR 80009 670 5082 00 1 53 670 5082 00 010970 BOARD ASSY REGULATOR 80009 670 5082 00 i 52 670 5082 00 010774 BOARD ASSY REGULATOR 80009 670 5082 00 c17 281 0523 00 CAP FXD CER DI 100PF 20PF 500V 72982 301 00002 0101 C20 290 0529 00 CAP FXD ELCTLT 47UF 20 20V 05397 T368C476M020AZ 25 290 0687 00 CAP FXD ELCTLT 5000UF 75 10 10V 56289 395630 C26 290 0687 00 CAP FXD ELCTLT 5000UF 75 108 10V 56289 395630 C35 281 0623 00 CAP FXD CER DI 650PF 5 500V 04222 7001 1362 1 C40 290 0529 00 CAP FXD ELCTLT 47UF 20 20V 05397 T368C476MO20AZ 50 290 0662 00 CAP FXD ELCTLT 220UF 20 10V 90201 TDC227MOl0DL C55 290 0517 00 CAP FXD ELCTLT 6 8UF 20 35V 56289 1960685 0035 1 C60 290 0527 00 CAP FXD ELCTLT 15UF 20 20V 90201 TDCl56MO20FL 65 283 0000 00 CAP FXD CER DI 0 001UF 100 0 500V 72982 831 516E102P E C75 290 0525 00 CAP PXD ELCTLT 4 7UF 208 50V 56289 1960475 0050 1 C801 281 0523 00 010100 010949 CAP FXD CER DI 100PF 20PF 500V 72982 301 00002 0101 805 281 0523 00 010100 010969 CAP FXD CER DI 100PF 20PF 500V 72982 301 00002 0101 C802 281 0523 00 010100 010773 CAP FXD CER DI 100PF 20PF 500V 72982 301 00002 0101 ca C811 283 0177 00 010950
20. 00 CAP FXD CER DI 0 1UF 20 50V 72982 8121 N088Z5U104M 545 290 0534 00 CAP FXD ELCTLT 30 20 35V 56289 1960105 0035 1 560 283 0003 00 CAP FXD CER DI 0 01UF 80 20 150V 72982 855 558250 1032 jStandard only Option 1 only Option 4 only REV B AUG 1977 34 K Ckt No C562 565 598 620 625 630 632 664 666 C668 C680 C681 C684 C685 C690 C692 C697 7 0 C722 C730 C732 C744 C746 C755 C757 C863 C865 C866 C870 C872 C875 C891 C904 C905 C906 l 1 CR25 CR26 CR67 CR68 CR122 154 CR165 CR185 CR195 CR232 CR264 CR275 CR295 CR320 CR330 CR332 CR384 Tektronix Part No 283 0000 00 283 0000 00 283 0198 00 283 0000 00 283 0003 00 283 0198 00 283 0003 00 283 0111 00 283 0023 00 281 0637 00 283 0000 00 283 0000 00 283 0047 00 281 0549 00 283 0111 00 283 0003 00 283 0028 00 283 0003 00 283 0341 00 290 0535 00 290 0535 00 283 0111 00 283 0111 00 283 0058 00 281 0523 00 283 0023 00 283 0003 00 281 0524 00 283 0000 00 283 0003 00 283 0003 00 281 0519 00 281 0739 00 281 0166 00 281 0504 00 152 0198 00 152 0198 00 152 0141 02 152 0141 02 152 0141 02 152 0141 02 152 0153 00 152 0141 02 152 0141 02 152 0141 02 152 0141 02 152 0153 00 152 0141 02 152 0141 02 152 0141 02 152 0141 02 152 0141 02 15 tandard only REV B
21. 01 0945 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q946 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q946 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q947 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q948 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q949 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q950 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q951 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q952 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q953 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q954 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q955 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q956 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q957 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q958 151 0190 01 TRANSISTQR SILICON NPN 80009 151 0190 01 Q959 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 0960 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 0961 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 0962 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q963 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 0964 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 0965 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q966 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 0967 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 0968 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 9969 151
22. 01121 2415 R340 315 0221 00 RES FXD CMPSN 220 OHM 5 0 25W 01121 2215 R342 315 0391 00 RES FXD CMPSN 390 OHM 5 0 25W 01121 3915 R345 315 0391 00 RES FXD CMPSN 390 OHM 5 0 25W 01121 83915 lstandard only y 2option 1 only 3option 4 only 4rurnished as a unit with 5210 REV B AUG 1977 Replaceable Electrical Parts DC505A Ckt No R347 R349 R352 R354 R356 R358 R360 R362 R364 R366 R368 R372 R380 R382 R383 R384 R388 R390 R392 R394 R395 R400 R402 R4031 R4032 R4033 R406 R408 R410 R412 R415 R416 R418 R420 R422 R425 R426 R430 R435 R436 R440 R441 R445 R446 R450 R451 R455 R456 R4581 R4581 R4582 R4582 R4583 R4583 Tektronix Part No 315 0102 00 315 0750 00 315 0821 00 315 0181 00 315 0821 00 315 0750 00 315 0821 00 315 0271 00 315 0750 00 315 0511 00 315 0102 00 315 0152 00 315 0271 00 315 0271 00 315 0273 00 315 0273 00 315 0510 00 315 0152 00 315 0102 00 315 0102 00 315 0240 00 315 0201 00 315 0301 00 315 0512 00 315 0512 00 315 0512 00 315 0181 00 315 0271 00 315 0821 00 315 0821 00 315 0511 00 315 0102 00 315 0301 00 315 0512 00 315 0101 00 315 0102 00 315 0103 00 315 0101 00 315 0152 00 315 0512 00 315 0152 00 315 0512 00 315 0152 00 315 G12 00 315 0152 00 315 0512 00 315 0152 00 315 0512 00 315 0242 00 315 0102 00 315 0242 00 315 0102 00 315 0242 00 315 0102 00 lstandard only Zoption
23. 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q970 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q975 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 0976 151 0342 00 TRANSISTOR SILICON PNP 80009 151 0342 00 9978 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 0979 151 0342 00 TRANSISTOR SILICON PNP 80009 151 0342 00 0981 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q982 151 0342 00 TRANSISTOR SILICON PNP 80009 151 0342 00 0984 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 0985 151 0342 00 TRANSISTOR SILICON PNP 80009 151 0342 00 0987 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 9989 151 0342 00 TRANSISTOR SILICON PNP 80009 151 0342 00 R10 305 0560 00 RES FXD CMPSN 56 OHM 5 2W 01121 HB5605 R12 315 0152 00 RES FXD CMPSN 1 5K OHM 5 0 25W 01121 1525 R14 307 0107 00 RES FXD CMPSN 5 6 OHM 5 0 25W 01121 85665 R16 315 0332 00 RES FXD CMPSN 3 3K OHM 5 0 25W 01121 53325 R17 311 1563 00 RES VAR NONWIR 1lK OHM 20 0 50W 73138 91 R18 315 0302 00 RES FXD CMPSN 3K OHM 5 0 25W 01121 53025 R30 321 0260 00 RES FXD FILM 4 99K OHM 1 0 125W 91637 MFF1816G49900F R31 321 0233 00 RES FXD FILM 2 61K OHM 1 0 125W 91637 MFF1816G26100F 3 10 REV B AUG 1977 r Ckt No R341 R342 R34 R35 R40 R42 R55 R58 R60 R62 R68 R72 R94 R96 R97 R98 R99 R100 R102 R104 R110 R112 R115 R120 R122 R130 R132 R1341 R1342 R1343 Tektronix Part
24. 07 124 352 0166 08 1 CONN BODY PL EL 8 WIRE GRAY 80009 352 0166 08 125 352 0167 09 1 CONN BODY PL EL 9 WIRE WHITE 80009 352 0167 09 ACCESSORIES 070 1984 00 1 MANUAL TECH INSTRUCTION NOT SHOWN 80009 070 1984 00 012 0532 00 1 CABLE ASSY RF 03 5 F LONG 80009 012 0532 00 1 Standard only Option 1 only Joption 4 only 9 6 6 REV AUG 1977 REV A APR 1977 DC 505A MBO eA Ium MANUAL CHANGE INFORMATION At Tektronix we continually strive to keep up with latest electronic developments by adding circuit and component improvements to our instruments as soon as they are developed and tested Sometimes due to printing and shipping requirements we can t get these changes immediately into printed manuals Hence your manual may contain new change information on following pages Asingle change may affect several sections Since the change information sheets are carried in the manual until all changes are permanently entered some duplication may occur If no such change pages appear following this page your manual is correct as printed SERVICE NOTE Because of the universal parts procurement problem some electrical parts in your instrument may be different from those described in the Replaceable Electrical Parts List The parts used will in no way alter or compromise the performance or reliability of this instrument They are installed when necessary to ensure prompt deliver
25. 1 only Option 4 only 3 14 Serial Model No Eff 011060 011080 011145 010100 011060 010100 011080 010100 011145 Dscont 011059 011079 011144 Name amp Description RES FXD CMPSN 1K OHM 5 0 25W RES FXD CMPSN 75 OHM 5 0 25W RES FXD CMPSN 820 OHM 55 0 25W RES FXD CMPSN 180 OHM 5 0 25W RES FXD CMPSN 820 OHM 5 0 25W RES FXD CMPSN 75 OHM 5 0 25W RES FXD CMPSN 820 OHM 5 0 25W RES FXD CMPSN 270 OHM 5 0 25W RES FXD CMPSN 75 OHM 5 0 25W RES FXD CMPSN 510 OHM 5 0 25W RES FXD CMPSN 1K OHM 5 0 25W RES FXD CMPSN 1 5K OHM 5 0 25W RES FXD CMPSN 270 OHM 5 0 25W RES FXD CMPSN 270 OHM 5 0 25W RES FXD CMPSN 27K OHM 5 0 25W RES FXD CMPSN 27K OHM 5 0 25W RES FXD CMPSN 51 OHM 5 0 25W RES FXD CMPSN 1 5K OHM 5 0 25W RES FXD CMPSN 1K OHM 5 0 25W RES FXD CMPSN 1K OHM 58 0 25W RES FXD CMPSN 24 OHM 5 0 258 RES FXD CMPSN 200 OHM 55 0 258 RES FXD CMPSN 300 OHM 55 0 25W RES FXD CMPSN 5 1K OHM 5 0 25W RES FXD CMPSN 5 1K OHM 5 0 25W RES FXD CMPSN 5 1K OHM 5 0 25W RES FXD CMPSN 180 OHM 5 0 25W RES FXD CMPSN 270 OHM 5 0 25W RES FXD CMPSN 820 OHM 5 O0 25W RES FXD CMPSN 820 OHM 58 0 25W RES FXD CMPSN 510 OHM 5 0 25W RES FXD CMPSN 1K OHM 5 0 25W RES FXD CMPSN 300 OHM 5 0 25W RES FXD CMPSN 5 1K OHM 5 0 25W RES FXD CMPSN 100 OHM 5 0 25W RES FXD CMPSN 1K OHM 5 0 25W
26. 25W RES FXD CMPSN 390 OHM 5 0 25W RES FXD CMPSN 390 OHM 5 0 25W Replaceable Electrical Parts DC505A Mfr Code 01121 01121 01121 01121 75042 01121 01121 01121 01121 01121 75042 03323 03323 01121 01121 01121 03323 03323 01121 01121 01121 01121 01121 01121 03323 01121 01121 01121 01121 91637 75042 73138 73138 91637 91637 01121 91637 73138 73138 91637 91637 01121 01121 01121 75042 01121 91637 91637 01121 01121 01121 01121 01121 01121 Mfr Part Number CB1325 1325 1325 1625 BWH R1200J CB1025 EB5105 CB1015 EB12G5 CB1025 CEBTO 1581F CB2725 CB2725 CB5125 CB3905 CB5125 CB3905 CB5125 CB3905 CB2035 CB2025 CB2035 CB2025 CB2035 CB2025 CB2015 CB2015 CB2015 CB3035 MFF1816G75001F CEBTO 1021F 91A R50K 91A R25K MFF1816G12102F MFF1816G39201F CB3035 MFF1816G75001F 91A R50K 91A R25K MFF1816G12102F MFF1816G39201F CB5105 CB2405 CB1025 9503 5105 1816654901 1816610003 1035 2715 5115 CB3915 CB3915 CB3915 3 11 Replaceable Electrical Parts DC505A lrurnished a unit with S100 RES FXD FILM 1M OHM 1 0 125W Tektronix Serial Model No Mfr Ckt No Part No Eff Dscont Name amp Description Code Mfr Part Number R136 315 0101 00 RES FXD CMPSN 100 OHM 5 0 25W 01121 CB1015 R138 315 0301 00 RES FXD CMPSN 300 OHM 5 0 25W 01121 3015 R142 315 05
27. 30V 150MA 07910 1N4152 4953 152 0141 02 011145 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR512 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR513 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR515 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR545 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1 4152 CR554 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR555 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR570 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR580 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR587 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR588 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR595 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR610 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR612 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR614 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR615 152 0008 00 SEMICOND DEVICE GERMANIUM 75V 60MA 80009 152 0008 00 CR625 152 0008 00 SEMICOND DEVICE GERMANIUM 75V 60MA 80009 152 0008 00 CR630 152 0008 00 SEMICOND DEVICE GERMANIUM 75 6 80009 152 0008 000 CR646 152 0141 002 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR647 152 0141 002 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR680 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR684 152 0141 02 SEMICOND DEVICE
28. 5125 R720 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 81025 R722 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 81025 R724 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 5125 R726 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 85125 R730 315 0242 00 RES FXD CMPSN 2 4K OHM 5 0 25W 01121 82425 R732 315 0242 00 RES FXD CMPSN 2 4K OHM 5 0 25W 01121 2425 R735 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 R740 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 5125 R742 315 0242 00 RES FXD CMPSN 2 4K OHM 55 0 25W 01121 82425 R744 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 746 315 0242 00 RES FXD CMPSN 2 4K 5 0 25 01121 2425 R755 315 0201 00 RES FXD CMPSN 200 OHM 5 0 25W 01121 2015 R757 315 0751 00 RES FXD CMPSN 750 OHM 5 0 25W 01121 7515 R765 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 81025 R768 315 0152 00 RES FXD CMPSN 1 5K OHM 5 0 25W 01121 81525 R770 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 5125 R774 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 5125 R775 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 5125 R776 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 5125 R777 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 5125 R780 315 0750 00 RES FXD CMPSN 75 OHM 5 0 25W 01121 7505 R781 315 0750 00 RES FXD CMPSN 75 OHM 5 0 25W 01121 87505 R782 315 0750 00 RES FXD
29. 6170 14 F2 Q172 H4 4 0195 H3 C4 0235 3 0240 3 64 0242 J3 E5 0270 3 4 0275 4 0280 12 5 0282 12 D6 Q330 H2 06 0385 F2 D6 Q420 C2 05 0430 4 4 0435 B2 0440 82 5 0445 2 5 0450 82 14 0455 C2 14 0480 4 H3 0485 4 K4 0490 4 J4 Q506 D4 14 Q515 E4 13 Q535 D4 Q595 6 NO GRID Loc Q598 850 0854 0865 0885 55 R100 R102 R104 R110 R112 R115 R120 R122 R125 R130 R132 R136 R138 R142 R145 R148 R150 R152 R154 R155 R157 R158 R160 R162 R165 R168 R170 R174 R178 R180 R185 R188 R190 R195 R196 R200 R202 R204 R205 R210 R212 R214 R220 R222 R225 R232 R235 R240 R242 R246 R248 R252 R255 R258 R260 R262 R264 CKT GRID NO LOC A5 G6 G6 D6 c5 J2 5 5 K6 K5 K4 K4 K5 K5 K5 J5 15 J6 15 15 H5 J6 L4 15 15 5 5 15 15 14 J5 5 14 5 5 15 H4 H2 13 H3 H3 1 44 44 44 L3 L3 K4 K3 J2 K2 K3 K4 J3 J3 K2 J2 J3 J2 4 L2 J4 J4 R265 R267 R268 R270 R272 R275 R278 R280 R284 R288 R290 R295 R298 R300 R305 R307 R308 R315 R317 R320 R324 R326 R329 R330 R335 R340 R342 R345 R347 R349 R352 R354 R356 R358 R360 R362 R364 R366 R368 R372 R380 R382 R383 R384 R388 R390 R392 R394 R395 R400 R402 R406 R408 R410 R412 R415 R416 R418 R420 R422 R425 R426 R430 R435 R436 CKT GRID NO Loc J4 J4 4 13 J4 13 1
30. C526 598 8 5 5 2 9 le ME 1 5 BIB 880 585 875 835 es 0845 5 5 0 7 1 7 8 EIS de 2395 eu OE i HH 65 5 2 376 ETN UM 0880 MINIMIH P 15112 1121 E S EFT THEE BEFR EAE REESE n 3 nf 53595 serere S C866 6 Located on of board C863 R244 R134 REV B AUG 1977 DCATION GRID JE I CKT NO ARD C50 C55 C104 C110 C112 C122 C125 C127 C135 C136 C158 C160 C180 C185 C190 C194 C195 C200 C214 C220 C222 C232 C235 C245 C246 C268 C270 C290 C295 C330 C342 C345 C350 C372 C384 C388 C390 C395 C400 C425 C485 0490 C515 C526 C532 C537 C598 C865 C866 C870 C872 C875 CR122 CR154 165 CR185 CR195 CR232 CR264 CR275 CR295 6 GRID 4 CR320 F4 J1 CR330 2 KS CR384 F2 K5 435 2 K4 CR440 82 5 CR445 C2 J5 CR450 82 J5 CR455 C2 J5 CR460 4 J5 CR494 F4 5 CR512 D4 14 513 54 5 CR515 4 CR580 C4 CR587 83 G2 588 84 G3 595 5 H3 CR850 6 K4 CR870 06 K3 CR875 K2 CR876 C5 K3 K4 J205 K4 J2 J310 K2 K2 13 L50 A4 J4 L55 J1 n L185 H5 12 L295 12 4 1332 H2 L870 D5 2 E2 Q125 J5 0130 J5 0132 15 1 Q160 15 1 0165 14 D1
31. Dividers to pin 12 of U495D whose output is pin 9 This pulse is transferred from pin 11 of U497C through to pin 6 of U500B coupled across Q535 to the clock inputs pins 1 and 13 of the GATE generator U590A and U590B This negative going edge at the clock inputs causesthe output at pin 9 to go high The high transferred to the base of Q506 appears at pin 4 of U495A When pin 4 of U495A goes low the initial start pulse of the GATE whose output is pin 14 of U497C into pin 11 of U500B turns off thus allowing a stop pulse to come from pin 4 of U500A through U495C into 9 of U500B The stop pulse is generated from pin 9 of U495D through U500C from pin 13 to pin 14 into the input pin 4 of U500A If an average of 1 10 is selected the stop pulse comes from pin 3 of U400 The signal at pin 6 the output of U500B produces a negative going edge coupled into the clock inputs of U590 to close or stop the GATE A negative going edge into the clock inputs both starts and stops the GATE After a start and stop of one GATE another GATE pulse will not occur until the DISPLAY TIME control and U580A and U580B reset the GATE generator U590 Q C 9 With the DC 505 averaging capability in measuring width itis necessary in addition to turning amaster GATE onand off to arm and disarm the display counter In taking N averages of the width of N pulses the inf
32. MHz Select SLOPE for CH A and check that readout still displays 3 MHz If all zeros appear in the display readjust R255 until display reads 3 MHz for both SLOPE and SLOPE selection 5 Adjust Check CH B LEVEL Center a Disconnect SG 503 output cable and 50 0 termination from CH A INPUT and connect to CH B INPUT Retain 150 mV 3 MHz signal from SG 503 Set DC 505A FUNCTION switch to PERIOD Set CH B controls for X1 ATTEN AC COUPL SLOPE Set N switch to 10 and CLOCK RATE to 1 us Center dot on CH B LEVEL control with knob pushed in b Adjust R145 so that GATE light flashes for both SLOPE and SLOPE selection Disconnect all test equipment and accessories from DC 505A 6 Adjust CH A and CH B Transient Response a A Tektronix 5S14N Sampling Unit was used for this step Set the 5S14N controls for zero delay 10 ns div sweep rate 0 1 V div vertical deflection factor and use Internal Triggering with Slope Use Repetitive Scanning REP with SCAN control fully clockwise Select LO NOISE and use CH 2 50 Q Input non inverted b Connect PG 502 output accessory cable via 10X Attenuator to 5S14N CH 2 Set PG 502 Period and Duration controls to display a single positive pulse about five horizontal divisions wide Adjust PG 502 HIGH and LOW LEVEL controls for 2 and 2 divisions of vertical deflection 0 2 V and 0 2 V fora total of 0 4 V displayed This establishes a 4 V output pulse from the PG 502 Set DC 505A
33. MQ paralleled by about 24 pF The Internal input circuits present nominal 50 Q impedances to match typical coaxial cable signal connections input Coupling Front Panel pushbuttons select ac Capactive or dc Direct coupling for each channel s input signal This coupling takes place after the signal arrive from the selected source and before they are passed on to the attenuators of each channel Attenuators and Maximum Input Volts The front panel pushbutton when out provides no attenuation to the input signal X1 In this mode the maximum safe input voltage is 50 V dc peak ac at 10 kHz or less CH A or CH B With the X20 attenuator selected the maximum safe input voltage is 250 V dc peak ac at 1 MHz orless CH Aor CH B See Table 1 6 Sensitivity and Frequency Range CH A and CH B will respond to signal amplitude of at least 50 mV rms sinewave times attenuation to 150 MHz and 100 mV rms sinewave times attenuation from 150 MHz to 225 MHz Depending on the coupling mode selected the low frequency limit for each channel is either 0 Hz dc coupled or 10 Hz ac coupled Slope and LEVEL A front panel pushbutton for each channel determines whether the trigger circuits will respond to either positive or negative going transitions of each input signal The LEVEL control for each channel allows the operator to move the hysteresis window of the trigger circuit to an optimum level on the input signal to en
34. Module must be performed as indicated below Refer these Power Module modifications to qualified service personnel 1 TM 503 with more than two DC 508 5 installed Replace C35 11 000 uF with a 18 000 uF capacitor Tektronix Part Number 290 0508 01 OPERATIONAL CHECK Controls and Connectors Pull out the tab labeled Controls Connectors and Rear Connector Pin Assignments at the rear of the manual to expose the front panel illustration Review the functions of the controls connectors and indicators before continuing with the operational checks Display Tests With no signal applied test the DC 505A s readout displays and switching logic The following checks will test most of the counter s major circuits and ensure its readiness to make measurements If any malfunctions are detected first refer to the Adjustment Procedure in the service section of this manual then the System Maintenance Section of the Power Module manual Readout Segment Test Press the RESET button to check the seven character segments of each digit A row of 8 s should be displayed This check of the display devices and drivers can be done at any time FREQ A Displays Using the FUNCTION switch select a FREQ A GATE TIME of 01 s Check the decimal point location leading zero suppression and units indicators according to Table 1 1 The decimal point and units indicator lights in any setting should not change when either the N switch or CLOCK RA
35. No 315 0132 00 315 0132 00 315 0132 00 315 0162 00 308 0701 00 315 0102 00 301 0510 00 315 0101 00 307 0093 00 315 0102 00 322 0212 00 315 0272 00 315 0272 00 315 0512 00 315 0390 00 315 0512 00 315 0390 00 315 0512 00 315 0390 00 315 0203 00 315 0202 00 315 0203 00 315 0202 00 315 0203 00 315 0202 00 315 0201 00 315 0201 00 315 0201 00 315 0303 00 321 0373 00 322 0194 00 311 1556 00 311 1557 00 321 0393 00 321 0346 00 315 0303 00 321 0373 00 311 1556 00 311 1557 00 321 0393 00 321 0346 00 315 0510 00 315 0240 00 315 0102 00 322 0622 01 315 0510 00 321 0360 00 321 0481 00 315 0103 00 315 0271 00 315 0511 00 315 0391 00 315 0391 00 315 0391 00 lstandard only 2option 1 only Option 4 only REV B AUG 1977 Serial Model No Eff XB010950 010970 010774 010100 010300 010100 010330 010100 010298 010100 010300 010100 010330 010100 010330 010950 010970 010774 010950 010970 010774 Dscont 010299 010329 010297 010299 010329 010329 Description RES FXD CMPSN 1 3K OHM 5 0 25W RES FXD CMPSN 1 3K OHM 5 0 25W RES FXD CMPSN 1 3K OHM 5 0 25W RES FXD CMPSN 1 6K OHM 5 0 25W RES FXD WW 0 12 OHM 5 2W RES FXD CMPSN 1K OHM 5 0 25W RES FXD CMPSN 51 OHM 5 0 SOW RES FXD CMPSN 100 OHM 5 0 25W RES FXD CMPSN 1 2 OHM 5 0 50W RES FXD CMPSN 1
36. RATE selection The resultant combination is diagonally cross coupled collectors Cer tain combinations of decimal points and parameters are common The XYZ transistor matrix turns on these combinations through diode pairs Table 1 3 in the Operating Instructions section describes which decimal points and parameters are turned on for the different combinations of CLOCK RATE and averaging factor N Troubleshooting Aid The Main circuit board has been designed so that the transistor matrix can be used as a troubleshooting aid For example if the averaging Switch S950 is set at 10 3 and the CLOCK RATE switch S895 to 1 us then according to Table 1 3 the decimal point appearing in the readout display should be placed at the 000 position The us units indicator light should be on If the decimal point or correct parameter light does not function because of a faulty transistor it can be found very easily Find the N averaging Switch S950 logic diagram on the schematic for the Main circuit board Start at the 10 3 line and trace back along the signal path Note thatthe signal is derived from column 3 of the transistor matrix The signal paths from the TTL interfacing gates to the transistor matrix are marked with the same units as the front panel CLOCK RATE switch Observe that the fourth row down is marked 1 indicating that the transistor controlling the correct parameter light and decima point is in the 4th row
37. SILICON 30V 150MA 07910 1N4152 CR685 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR690 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR692 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR697 152 0008 00 SEMICOND DEVICE GERMANIUM 75V 60MA 80009 152 0008 00 CR725 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR726 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR850 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR870 152 0269 00 SEMICOND DEVICE SILICON VAR VCAP 4V 33PF 80009 152 0269 00 CR875 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR876 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR895 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR896 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR912 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR914 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR935 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR936 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 lstandard only 2option 1 only Joption 4 only 3 6 REV B AUG 1977 Replaceable Electrical Parts DC505A 4 Tektronix Serial Model No Mfr z No Part No Dscont Name amp Description Code Mfr Part Number CR937 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR940 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 14152 CR941 152 0141 02
38. STREET 31 BROOK ST WEST ST CHARLES ROAD 900 INDUSTRIAL RD 47 16 AUSTEL PLACE 2100 S O BAY ST P O BOX 500 2530 CRESCENT DR 57 CORDIER ST 225 HOYT 9 City State Zip HARRISBURG PA 17105 DALLAS TX 75222 GARDEN GROVE CA 92642 SOUTH NORWALK CT 06586 LOS ANGELES CA 90065 NEW CUMBERLAND PA 17070 CAMPBELLSVILLE KY 42718 CAMBRIDGE MA 02138 CINCINNATI OH 45206 ATTLEBORO MA 02703 HARTFORD CT 06110 ELGIN IL 60120 SAN CARLOS CA 94070 LONG ISLAND CITY NY 11101 MILWAUKEE WI 53207 BEAVERTON OR 97077 BROADVIEW IL 60153 IRVINGTON NJ 07111 MAMARONECK NY 10544 REV A APRIL 1977 Fig amp Index No 1 1 2 9 3 4 5 6 7 9 13 14 15 16 17 18 19 20 21 22 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 1 1 1 1 J J B 1 1 J 1 J 1 J Tektronix Part No 337 1399 04 366 1031 05 213 0153 00 366 1170 01 213 0153 00 366 0494 00 213 0153 00 366 1422 01 214 1840 00 210 0583 00 210 0940 00 210 0255 00 358 0029 00 220 0495 00 210 0978 00 426 0681 00 426 0916 00 333 1774 01 331 0314 00 214 1513 01 213 0254 00 337 1872 00 136 0252 00 136 0387 00 386 2671 01 213 0229 00 213 0227 00 366 1257 28 366 1489 66 366 1257 27 337 1897 00 211 0503 00 384 0519 00 210 0407 00 211 0511 00 166 0031 00 131 0938 00 407 1352 00 21
39. Sloss use 5 Q 7 2 v 5 G 05 Rise 24 C 300 umi E Sio iov 100 oss 2 18 PART 5195 FUNCTION WNoicaATES CONTACT CLC Al TRIGGER BOARD 1ov R272 xS 5 Rise ene gv amp 175 148 Cres 8 3 Mar 55 aso T E 21 90 a210 IE Rw 7 542 Sak 8265 m 4 iov 7 vaso ov 10102 5 2 RAS 32 510 0 G235A sv 0242 f grue R242 54 sic 46 25 C245 2 18 5 55 ad xe ovTi 5 criss V Umoc gt ries i L ve Riez roo cies Rise 55 90 iss V 98165 on 7 334F 8 2 sv AIT Ribos Aces 576 rise lt ciao CRISA moe Rie M 2 7 5 pM 5 QA 7 iov 470 45v iov L 180 R45 joo 5 vars ADJUST wey RIZ 95058 1 cas pe z cia 5 ami 791 QISA sv H 19 8130 E 79 d 450 Ra fa T R02 lok a 156 10 vours CR 55 300 p SY gt Rx 25 RIO4 02 510 Rid
40. and Output Signal Selection Time AVERAGING AND CONTROL Averaging Divider Gate and Control Logic Generator Phase Lock Loop COUNTERS DISPLAY MULTIPLEXING TIME BASE AND PARAMETER SELECTION 10 10 Decade Counter Units DCU and Display Latches Time Slot Generator Overflow Indication Circuit Time Base and Clock Rate Divider Optional 1 MHz Clock Time Base Decimal Point and Parameter Selection Troubleshooting Aid DISPLAY AND POWER SUPPLIES Seven Segment Decoder and Driver Display and Parameter LED s Leading Zero Suppression Regulated Power Supplies SECTION 3 ELECTRICAL PARTS LIST Page 1 11 1 11 1 12 1 14 1 15 1 15 1 16 2 1 2 1 2 1 2 2 2 2 2 2 2 3 2 3 2 3 2 4 2 5 2 5 2 5 2 5 2 5 2 5 2 6 2 6 2 6 EN EL DC 505A TABLE OF CONTENTS cont mu SECTION 4 OPTIONS Options Table of Contents 4 1 L SECTION 5 SERVICE INFORMATION Symbols and Reference Designators 5 1 Rear Interface Connectors reverse side Test Equipment Required Controls amp Connectors Adjustments reverse foldout Block Diagram Parts Location Grid Trigger Circuit Board backside of foldout Input Trigger 10 DCU amp Power Supply Parts Location Grid Main Circuit Board backside of foidout Gate and Control Logic Averaging Divider and Reset Parts Location Grid Main Board Back and Display Circuit Board backsi
41. be measured but at the expense of the greater resolution capabilities of the longer gate times Resolution A 10 5 GATE TIME means the operator must wait 10 seconds for a measurement to be made and displayed It is the only way to get best possible resolution and accuracy for signals below 1 MHz Even then a 10 second count will display fewer than the available 7 digits Overflow Through intentional use of overflow dis plays it is possible to improve the resolution of the counter Choose a GATE TIME 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 decima Move the decimal point to the left by choosing longer GATE TIMES until the desired resolution is achiev ed The display will flash when the most significant number overflows the last storage register The relationship between GATE TIME measured frequency displayed digits and overflow is shown in Table 1 5 TABLE 1 5 GATE 10 MHz to TIME 2100 MHz 100 MHz 7 digits 6 digits 5 digits 4 digits 15 Overflow 7 digits 6 digits 5 digits Overflow Overflow 7 digits 6 digits Overflow Overflow Overflow 7 digits 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 gate and stores the display for a longer time before a ne
42. controls the horizontal movement of the start edge of the pulse displayed on CH 2 see illustration Connect DC 505A LEVEL OUT and ground to HI and LO inputs of the DM 501 respectively Set DM 501 for DC VOLTS 2 V range 2 V CH 1 RAMP 45 8 div CH 2 A B out Typical display after completion of step 7c A Edge is always positive going B Edge negative going d First adjust check CH A LEVEL OUT then repeat this procedure for CH B LEVEL OUT Adjust CH A CH B LEVEL knob so that A edge B edge crosses the Ramp at 0 V center graticule Verify that CH A CH B LEVEL knob is mechanically centered Adjust R87 CH A BIAS R97 for CH B BIAS on LEVEL OUT circuit board for 0 00 V on the DM 501 Use CH 2 Position control and rotate CH A LEVEL CH B LEVEL control knob until A edge B edge crosses the Ramp at 1 5 V up 3 divisions Adjust R86 CH A GAIN R96 for CHB GAIN for 1 5 Von the DM 501 For each DC 505A channel rotate the respective LEVEL knob CW and CCW and verify that the output voltage monitored on the DM 501 will exceed plus and minus 2 0 Volts TRIGGER BOARD LEFT SIDE C905 1 MHz CRYSTAL ADJUST RBTO CRETO VOLTAGE 2 6 OPTION 1 OLTAGE 2 6 V 5 MHz CRYSTAL L870 ADJUST Y901 PHASE LOCK ADJUST R17 15 V ADJUST 1 MHz Clock 14A 8 7 5 wn m H 18 wem OD
43. errorand Trigger jitter error 0 1 V P 0 005 V 0 005 V N of stop edge dV dt of start edges dV dt of stop edges N is averaging factor dV dt is limited toa maximum of 0 2 V 2 ns by the amplifier risetimes e REV A AUG 1977 1 13 Operating Instructions DC 505A TABLE 1 7 cont 4 A For TIME 8 and WIDTH 5 measurements the internal clock rate and the repetition rate of the measured interval must not be synchronous B For EVENTS A DURING B the repetition rates of the signals applied to A and B must not be synchronous 10 ns Volt Level Setting Pulse Height Baseline start Fig 1 5 TABLE 1 8 Internal Time Base Characteristics Performance Requirements Supplemental Information Standard Option Stability 0 C to 50 C After 1 2 Hour Warm up 1 part or less Within 5 parts in 10 in 10 1 part or less in 10 per month 1 part or less in 10 per month Long Term Drift 1 MHz Clock Signal Adjustable to within 1 part in 107 Adjustable to within 5 parts in 10 1 14 REV A APR 1977 TABLE 1 9 Display Characteristics Performance Requirements Display Time A OUT Logic Levels Propagation Delay Propagation Delay TABLE 1 10 Outputs Performance Requirements Characteristics 0 A
44. for SLOPE AC COUPL X1 ATTEN c First adjust CH A and then CH B Disconnect PG 502 cable and 10X Attenuator from 5S14N and connect to CHAINPUT viaa 50 Q Feedthrough Termination Connect P6057 100X Probe to CH 2 of 5S14N and place probe tip on TP8 for CH B Attach probe ground clip to nearest BNC ground on the circuit board Set 5S14N for 10 mV div and INVERT CH 2 DC 505A LEVEL control may need adjusting to center the display d Adjust C245 C135 for CH B for a positive pulse that displays an optimum square corner with minimum ringing total system aberrations not to exceed 15 of the peak to peak amplitude e Removethe 10X Attenuator from the system and depress the DC 505A X20 ATTEN button Reconnectthe PG 502 outputtothe DC 505A Pulse waveform should now have one half the previous amplitude with no ringing Front corner overshoot during the first 5 ns is a normal condition Disconnect all test equipment and remove the 5S14N Sampling Unit Reinstall the 5B40 Time Base 7 This as a Dua ALTERN a Us Coaxial CH ar GND ground 1 channel Position 0 b Se output oscillosc oscillosc positive through divisions display c Cc Sealectr of DC 5 FUNCTI controls displaye OUT anc Set DM 8 div Typical always d Fi procedu knob so graticule centered OUT cirt control e A edge Adjust R 501 For CW and DM 501 ADJUSTMEN
45. of events per interval For averaging to work the events being measured must be repetitive S E a pe Counter Timer Gate Open Time CH B Input Signal CH A Input Signal Operating Instructions DC 505A Fig 1 4 Illustration depicting CH A pulses and portion of CH A pulses being counted during the counter timer gate open time controlled by CH signal Event per interval averaging should be used whenever the 1 count error from a single event per interval measurement N switch actually set to 1 significantly degrades the accuracy or resolution of the measurement When using averaging the inherent instrument noise will limit the resolution of the measurement The accuracy of the event per interval averaging measurement can be determined by using the following ormula _ freq into CH A fractional part only of 1 Freq into GH VN 1 fractional resolution required TOTALIZING Purpose In the TOTALIZE A mode signal events applied to CHA INPUT are counted and the accumulated total is displayed during the time the IN START OUT STOP button is pushed in This mode is a manual analog of the frequency mode Its main application is to accumulate a count of relatively slow and irregular events Operation Apply the signal to CH A andsetthe trigger controls the same as for frequency measurement Starting the Count Press the IN START OUT ST
46. 0 6 0718 F2 610 0725 F2 CR612 K3 0790 1 CR614 13 0796 1 CR615 14 0800 1 625 2 0806 1 CR630 14 10810 1 646 4 0815 1 647 12 0820 C1 CR680 G3 Q825 C1 CR684 G3 0930 C4 CR685 62 0935 5 CR690 03 0936 D5 CR692 2 0937 D5 CR697 0938 D5 725 F2 0939 E5 726 1 10940 5 CR895 144 0941 C4 CR896 14 10942 D4 CR912 4 0943 D4 CR914 4 0944 D4 CR935 0945 4 CR943 0946 4 CR947 AS 0947 4 CR948 86 10948 D4 950 86 10949 D4 CR951 86 0950 D4 CR954 86 0951 E4 CR955 B6 0952 E4 Q954 Q955 Q956 Q957 Q958 Q959 a960 Q961 Q962 Q963 Q964 Q965 Q966 Q967 Q968 Q969 Q970 Q975 Q976 Q978 Q979 6981 0982 Q984 9985 3987 0989 R10 R12 R14 R16 R17 R18 R30 R31 R34 R35 R42 R60 R62 R68 R72 R75 R78 R80 R81 R85 R475 R540 R542 R543 R545 R547 R550 R554 R560 R565 R570 8574 R605 R606 R615 R622 R623 R625 R628 GRID CKT GRID CKT GRID CKT GRID LOC NO LOC NO LOC LOC Q953 C4 R629 44 891 J3 U900 15 04 R632 12 895 H4 901 H5 04 R635 K3 R897 H4 920 H3 04 9637 H R900 15 U922 G3 4 640 12 R902 15 925 F3 4 642 K2 R906 15 C4 9644 K2 8910 15 VR34 J4 04 R647 G4 18912 H4 VR42 K5 54 655 K2 19914 H4 04 656 K2 R916 H5 E4 R660 K2 R918 5 4 8662 2 919 H4 C3 664 12 18920 H4 D3 R666 12 R922 E3 03 668 11 18923 E3 03 19670 K2 R94
47. 0 0586 00 1 REV AUG 1977 Serial Model No Eff Dscont Qty 12345 3 3 P NNNNW PNNN NN PPNO WN FPR N Replaceable Mechanical Parts DC505A Name amp Description SHIELD ELEC SIDE KNOB RED CAL SETSCREW 5 40 X 0 125 INCH HEX SOC STL KNOB GRAY 4 SIDED SETSCREW 5 40 X 0 125 INCH HEX SOC STL KNOB GRAY EACH KNOB INCLUDES SETSCREW 5 40 X 0 125 INCH HEX SOC STL KNOB LATCH ATTACHING PARTS PIN KNOB SECRG 0 094 OD X 0 120 INCH LONG RESISTOR VAR SEE R150 AND R260 EPL ATTACHING PARTS FOR EACH NUT PLAIN HEX 0 25 32 X 0 312 INCH BRS WASHER FLAT 0 25 ID X 0 375 INCH OD STL CONNECTOR RCPT SEE 2100 AND 230 EPL ATTACHING PARTS FOR EACH TERMINAL LUG 0 391 ID INT TOOTH X lt BSHG MACH THD HEX 0 375 32 X 0 438 LONG ATTACHING PARTS NUT PLAIN HEX 0 375 32 X 0 438 INCH BRS WASHER FLAT 0 375 ID X 0 50 INCH OD STL FR PUSH BUTTON GRAY PLASTIC FRAME RDOUT WDO PANEL FRONT WINDOW READOUT RED LCH PLUG IN RET ATTACHING PARTS SCR TPG THD CTG 2 32 X 0 250 100 DEG FLH X SHLD ELECTRICAL SUBPANEL CKT BOARD ASSY DISPLAY SEE A3 EPL ATTACHING PARTS SCREW MACHINE 3 48 X 0 125 PNH STL e LAMP LED SEE DS825 DS826 DS827 DS828 SOCKET PIN TERM 0 145 INCH LONG JACK TIP GRAY SWITCH SLID
48. 02 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 3025 R666 315 0561 00 RES FXD CMPSN 560 OHM 5 0 25W 01121 5615 R668 315 0750 00 RES FXD CMPSN 75 OHM 5 0 25W 01121 7505 R670 315 0511 00 RES FXD CMPSN 510 OHM 5 0 25W 01121 CB5115 R672 315 0302 00 RES FXD CMPSN 3K OHM 5 0 25W 01121 3025 R680 315 0510 00 RES FXD CMPSN 51 OHM 5 0 25W 01121 5105 R684 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 5125 R687 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 5125 R690 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 CB5125 R692 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 CB5125 3option 4 only 6 3 16 REV 8 AUG 1977 1 Ckt No loption 1 only 2standard only REV B AUG 1977 Replaceable Electrical Parts DC505A Tektronix Serial Model No Mfr Part No Eff Dscont Name amp Description Code Mfr Part Number R695 315 0511 00 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 R697 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 85325 R699 315 0103 00 RES FXD CMPSN 10K OHM 5 0 25W 01121 1035 8701 315 0301 00 RES FXD CMPSN 300 OHM 5 0 25W 01121 CB3015 R704 315 0203 00 RES FXD CMPSN 20K OHM 5 0 25W 01121 2035 R710 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 85325 R712 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 85325 R714 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 85325 R718 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 01121
49. 10 00 RES FXD CMPSN 51 OHM 5 0 25W 01121 5105 R145 311 1567 00 RES VAR NONWIR 100 OHM 208 0 SOW 73138 91 100 R148 315 0181 00 RES FXD CMPSN 180 OHM 5 0 25W 01121 1815 8150 311 1841 00 RES VAR NONWIR 1K OHM 10 1W 01121 14 003 R152 315 0100 00 RES FXD CMPSN 10 OHM 5 0 25W 01121 81005 R154 315 0241 00 RES FXD CMPSN 240 OHM 5 0 25W 01121 2415 R155 315 0241 00 RES FXD CMPSN 240 OHM 5 0 25W 01121 82415 R157 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 5125 158 315 0101 00 RES FXD CMPSN 100 OHM 5 0 25W 01121 1015 R160 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 R162 315 0101 00 RES FXD CMPSN 100 OHM 5 0 25W 01121 1015 R165 315 0101 00 RES FXD CMPSN 100 OHM 5 0 25W 01121 1015 R168 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 R170 315 0471 00 RES FXD CMPSN 470 OHM 5 0 25W 01121 4715 51742 315 0511 00 010100 010299 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 1742 315 0471 00 010300 RES FXD CMPSN 470 OHM 5 0 25W 01121 4715 81742 315 0511 00 010100 010329 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 1743 315 0471 00 010330 RES FXD CMPSN 470 OHM 5 0 25W 01121 4715 1744 315 0511 00 8 010100 B010297 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 1744 315 0471 00 010298 RES FXD CMPSN 470 OHM 5 0 25W 01121 4715 8178 315 0390 00 RES FXD CMPSN 39 OHM 5 0 25W 01121 83905 R180 315 511 000 RES FXD CMPSN
50. 10 0551 002 010970 1 NUT PLAIN HEX 4 40 X 0 25 INCH STL 83385 OBD 210 0551 003 010774 1 NUT PLAIN HEX 4 40 X 0 25 INCH STL 83385 OBD 114 210 0004 001xB010950 1 WASHER LOCK INTL O 12 ID X 0 26 OD STL 78189 1204 00 00 0541 210 0004 002xB010970 1 WASHER LOCK INTL O 12 ID X 0 26 OD STL 78189 1204 00 00 0541 210 0004 002xB010774 1 WASHER LOCK INTL O 12 ID X 0 26 0D STL 78189 1204 00 00 0541 115 210 0921 001xB010950 1 WASHER MICA 0 50 X 0 141 X 0 005 INCH THK 80009 210 0921 00 210 0921 002 010970 1 WASHER MICA 0 50 X 0 141 X 0 005 INCH THK 80009 210 0921 00 210 0921 003 010774 1 WASHER MICA 0 50 X 0 141 X 0 005 INCH 80009 210 0921 00 6 5 MO 116 426 0724 11 1 FR SECT PLUG IN BOTTOM 80009 426 0724 11 117 175 0826 00 WIRE ELECTRICAL 3 WIRE RIBBON 80009 175 0826 00 118 175 0828 00 010100 010629 WIRE ELECTRICAL 5 WIRE RIBBON 08261 OBD 175 0828 003 WIRE ELECTRICAL 5 WIRE RIBBON 08261 OBD 119 175 0830 00 WIRE ELECTRICAL 7 WIRE RIBBON 08261 OBD 120 175 0831 00 FT WIRE ELECTRICAL 8 WIRE RIBBON 08261 OBD 121 175 0832 00 WIRE ELECTRICAL 9 WIRE RIBBON 08261 OBD 131 0707 00 24 CONTACT ELEC 0 48 1 22 26 AWG WIRE 22526 75691 005 122 352 0161 04 1 CONN BODY PL EL 3 WIRE YELLOW 80009 352 0161 04 352 0161 05 1 CONN BODY PL EL 3 WIRE GREEN 80009 352 0161 05 352 0163 05 010100 010629 1 CONN BODY PL EL 5 WIRE GREEN 80009 352 0163 05 123 352 0165 07 1 CONN BODY PL EL 7 WIRE VIOLET 80009 352 0165
51. 125 CB1525 CB5125 CB2425 CB1025 CB2425 CB1025 CB2425 CB1025 REV B AUG 1977 r 6 EM Tq lt e I eons F 6 Replaceable Electrical Parts DC505A Tektronix Serial Model Mfr PartNo Dscont Name amp Description Code Mfr Part Number R460 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 R465 315 0241 00 RES FXD CMPSN 240 OHM 5 0 25W 01121 CB2415 84681 315 0821 00 010100 011059 RES FXD CMPSN 820 OHM 5 0 25W 01121 CB8215 R468 315 0511 00 011060 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 R4682 315 0821 00 010100 011079 RES FXD CMPSN 820 OHM 5 0 25W 01121 8215 2468 315 0511 00 011080 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 24683 315 0821 00 010100 011144 RES FXD CMPSN 820 OHM 5 0 25W 01121 8215 4683 315 0511 00 011145 RES FXD CMPSN 510 OHM 5 0 25W 01121 85335 R470 315 0271 00 RES FXD CMPSN 270 OHM 5 0 25W 01121 82715 R4754 311 1431 00 RES VAR NONWIR 500K OHM 10 0 25W 01121 688032 R478 315 0511 00 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 R479 315 0621 00 RES FXD CMPSN 620 OHM 5 0 25W 01121 6215 R482 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 R484 315 0752 00 RES FXD CMPSN 7 5K OHM 5 0 25W 01121 87525 R487 315 0200 00 RES FXD CMPSN 20 OHM 5 0 25W 01121 82005 R490 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 10
52. 151 0367 00 0515 151 0342 00 TRANSISTOR SILICON PNP 80009 151 0342 00 0535 151 0220 00 TRANSISTOR SILICON PNP 80009 151 0220 00 9540 151 0503 00 TRANSISTOR SCR 30V 0 8A 04713 2N5060 0550 151 0342 00 TRANSISTOR SILICON PNP 80009 151 0342 00 0565 151 0341 00 TRANSISTOR SILICON NPN 07263 8040065 9570 151 0341 00 TRANSISTOR SILICON NPN 07263 8040065 0575 151 0341 00 TRANSISTOR SILICON NPN 07263 5040065 0595 151 0342 00 TRANSISTOR SILICON PNP 80009 151 0342 00 0598 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 0615 151 0341 00 TRANSISTOR SILICON NPN 07263 5040065 0640 151 0342 00 TRANSISTOR SILICON PNP 80009 151 0342 00 0655 151 0342 00 TRANSISTOR SILICON PNP 80009 151 0342 00 0660 151 0342 00 TRANSISTOR SILICON PNP 80009 151 0342 00 0670 151 0438 00 TRANSISTOR SILICON PNP SEL FROM SPS6927 80009 151 0438 00 Q680 151 0341 00 TRANSISTOR SILICON NPN 07263 5040065 Q690 151 0341 00 TRANSISTOR SILICON NPN 07263 5040065 9700 151 0341 00 TRANSISTOR SILICON NPN 07263 5040065 Q701 151 0341 00 TRANSISTOR SILICON NPN 07263 5040065 0702 151 0341 00 TRANSISTOR SILICON NPN 07263 5040065 Q703 151 0341 00 TRANSISTOR SILICON NPN 07263 5040065 0704 151 0341 00 TRANSISTOR SILICON NPN 07263 8040065 0718 151 0341 00 TRANSISTOR SILICON NPN 07263 5040065 0725 151 0341 00 TRANSISTOR SILICON NPN 07263 5040065 0790 151 0301 00 TRANSISTOR SILICON PNP 04713 282907 9796 151 0301 00 TRANS ISTOR SILICON PN
53. 181 01 108 0509 00 108 0420 00 151 0334 00 151 0334 00 151 0334 00 151 0334 00 151 0334 00 151 0334 00 151 0515 01 151 0342 00 151 0342 00 151 0190 01 151 1042 00 151 0438 00 151 0427 00 151 0438 00 151 0427 00 151 0427 00 151 0427 00 151 0342 00 151 1042 00 151 0438 00 151 0427 00 151 0438 00 151 0427 00 151 0427 00 151 0427 00 151 0342 00 151 0342 00 15 1 20ption l only 3option 4 oniy 3 8 B010100 B010880 010100 010830 010100 010881 010100 010830 010100 010880 010100 010830 010950 010970 010774 010950 010970 010774 Serial Model No Eff Dscont 010879 010829 010879 010829 010879 010829 amp Description LAMP LED RED 2 5V 15MA LAMP LED RED 5MA 2 0V LAMP LED RED 2 5V 15MA LAMP LED RED 5MA 2 0V LAMP LED RED 2 5V 15 LAMP LED RED 5MA 2 OV LAMP LED RED 2 5V 15MA LAMP LED RED 5MA 2 0V LAMP LED RED 2 5V 15MA LAMP LED RED SMA 2 OV LAMP LED RED 2 5V 15 LAMP LED RED SMA 2 FUSE CARTRIDGE 3AG 4A 250V FAST BLOW CONNECTOR RCPT BNC FEMALE W HARDWARE CONNECTOR RCPT 50 OHM MALE SNAP ON CONNECTOR RCPT BNC FEMALE W HARDWARE CONNECTOR RCPT 50 OHM MALE SNAP ON COIL RF 14UH COIL RF 25UH COIL RF 80UH COIL 0 2UH COIL RF 0 2UH COIL RF 2 5UH COIL RF 60NH TRANSISTOR SILICON
54. 2 J2 12 12 n 12 12 H3 2 12 H2 H3 5 F4 F4 G4 H2 H1 H2 E1 G1 F2 2 04 B3 B3 D4 B3 D4 B3 F2 F3 F2 D1 H6 H6 H1 D1 F2 F2 E4 54 54 54 54 C2 D2 A3 C2 A4 A4 C3 82 82 8440 441 IR445 R446 8450 8451 8455 456 458 8460 R465 R468 R470 R478 R479 R482 R484 R487 R490 8492 R494 R495 8497 8500 R504 R506 R508 R510 R512 R515 R516 R518 8520 8524 8526 8530 8532 8535 18537 580 8582 R590 R592 8595 8596 8598 8835 8837 8839 8842 R844 R847 R850 R854 R856 860 R862 R863 R865 R867 R870 R872 R875 R876 GRID CKT Loc B2 R880 B2 R881 C2 R885 C2 R887 B2 B2 100 C2 S105A C2 S1058 A2 S185 F4 S210 F2 S215A F3 S2158 H3 S295 H4 HS U190 D4 U195 c5 200 4 U315 U340 C4 U342 F4 U345 F3 U350 G4 355 G4 360 F4 U390 D4 U400 F4 U410 G4 435 H4 U440 E4 U445 G4 U450 F4 U455 E4 U495 04 0497 5 0500 04 580 D4 0585 04 0587 04 0590 1 835 C4 1845 0855 4 0856 5 0875 4 0880 6 D4 55 05 165 F5 170 F5 VR180 E5 VR275 G6 VR280 H6 VR290 H6 G6 E6 E6 E6 E6 D6 D6 D5 cs BS B4 85 5 5 14 K6 K5 J5 2 K4 K3 J3 G2 14 G4 G2 F1 E1 E2 D2 D3 G1 E2 E3 81 C1 D1 D2 G3 G4 54 84 85 6 84 55 5 F6 E6 D5 B5 J2 H4 I5 J4 12 0
55. 2 L 15 alms 1045 tus DE E 19 5 5835 INDICATES CONTACT CLOSED 5 M 7494 ines 5 0925 7 7431 7410 5V R875 R8473 6865 5 R863 5 5 2k 791 EL lok 5 4 5 1 MHz ERS SHA 5 57 5 5 R 87 5 sS lt 52 R870 noi gt 6 1 333 io aq 2 CREST 087 L870 2 14 4 0 D lt 3 104 8A 41579 3 5 875 5Y 5 ps 255 CRB C872 m SRS T oi 9865 2872 0856 4044 7 852 855 U845B 0845 ium B20 U835A Mcioisl R837 320 PART O 195 DC 5O5A 2 TRIGGER BOARD 1984 16 REV 5 978 1 Section 6 DC 505A REPLACEABLE MECHANICAL PARTS PARTS ORDERING INFORMATION Replacement parts are available from or through your local Tektronix Inc Field Office or representative Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest circuit improvements developed in our engineering department It is therefore important when ordering parts to include the following i
56. 201 00 RES FXD CMPSN 200 OHM 5 0 25W 01121 82015 B R510 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 R512 315 0100 00 RES FXD CMPSN 10 OHM 5 0 25W 01121 1005 R515 315 0273 00 RES FXD CMPSN 27K OHM 5 0 25W 01121 2735 R516 315 0273 00 RES FXD CMPSN 27K OHM 5 0 25W 01121 82735 R518 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 520 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 1 R524 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 81025 R526 315 0102 00 RES FXD CMPSN 1K 5 0 25 01121 1025 530 315 0911 00 RES FXD CMPSN 910 OHM 5 0 25W 01121 89135 R532 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 81025 R535 315 0300 00 RES FXD CMPSN 30 OHM 5 0 25W 01121 83005 i R537 315 0101 00 RES FXD CMPSN 100 OHM 5 0 25W 01121 CB1015 540 315 0184 00 RES FXD CMPSN 180K OHM 5 0 25W 01121 1845 1 R542 315 0202 00 RES FXD CMPSN 2K 5 0 25 01121 2025 R543 315 0511 00 RES FXD CMPSN 510 5 0 25 01121 5115 R545 315 0512 00 RES FXD CMPSN 5 1K 5 0 25 01121 5125 lstandard only LJ peu Weed 2option 1 only Option 4 only Purnished as a unit with 5475 REV B AUG 1977 Replaceable Electrical Parts DC505A lstandard only 2option 1 only Tektronix Serial Model No Mfr 0 Part No Eff Dscont Name amp Description Code Mfr Part Number R547 315 0202 00 RES F
57. 22 7001 1375 C390 283 0023 00 CAP FXD CER DI 0 1UF 80 20 12V 91418 MxX104Z1201R0 395 281 0638 00 CAP FXD CER DI 240PF 5 500V 72982 3010007502415 C400 283 0003 00 CAP FXD CER DI 0 01UF 480 20 150V 72982 855 558250 1032 c4031 283 0003 00 011060 CAP FXD CER DI 0 01UF 480 20 150V 72982 855 558250 1032 c4032 283 0003 00 011080 CAP FXD CER DI 0 01UF 80 20 150V 72982 855 558250 1032 c4033 283 0003 00 XB011145 CAP FXD CER DI 0 01UF 80 20 150V 72982 855 558750 1032 C425 281 0605 00 CAP FXD CER DI 200PF 10 500V 04222 7001 1375 485 290 0536 00 FXD ELCTLT 10UF 205 25V 90201 TDCLO6MO25FL c4901 283 0660 00 010100 8 011059 CAP FXD MICA D 510PF 2 500V 00853 D155F511G0 c4901 283 0672 00 B011080 CAP PXD MICA 200 1 500 00853 D155F201F0 4902 283 0660 00 010100 8 011079 CAP FXD MICA D 510PF 2 500V 00853 D155F511G0 c4902 283 0672 00 B011080 CAP FXD MICA D 200PF 1 500V 00853 155 201 0 c4903 283 0660 00 010100 BO11144 CAP FXD MICA D 510PF 2 500V 00853 D155F511G0 64903 283 0672 00 011145 CAP FXD MICA D 200PF 1 500V 00853 D155F201FO C515 283 0023 00 CAP FXD CER DI 0 1UF 80 208 12V 91418 10421201 0 C526 283 0641 00 CAP FXD MICA D 180PF 1 100V 00853 D151E181FO 0532 283 0003 00 CAP FXD CER DI 0 01UF 80 205 150V 72982 855 558250 1032 C537 281 0628 00 CAP FXD CER DI 15PF 5 500V 72982 301 000C0G01507 c540 290 0536 00 CAP FXD ELCTLT LOUF 20 25V 90201 TDCLOEMO25FL 0543 283 0111
58. 25 84921 315 0511 00 8010100 B011059 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 84921 315 0122 00 011060 RES FXD CMPSN 1 2K OHM 5 0 25W 01121 CB1225 R492 315 0511 00 010100 011079 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 84922 315 0122 00 8011080 RES FXD CMPSN 1 2K OHM 5 0 25W 01121 1225 84923 315 0511 00 010100 011144 RES FXD CMPSN 510 OHM 5 0 25W 01121 85135 84923 315 0122 00 8011145 RES FXD CMPSN 1 2K OHM 5 0 25W 01121 1225 8494 315 0202 00 010100 011059 RES FXD CMPSN 2K OHM 5 0 25W 01121 CB2025 24941 315 0102 00 011060 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 R494 315 0202 00 010100 011079 RES FXD CMPSN 2K OHM 5 0 25W 01121 2025 4942 315 0102 00 011080 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 4943 315 0202 00 8010100 011144 RES FXD CMPSN 2K OHM 5 0 25W 01121 82025 84942 315 0102 00 011145 RES FXD CMPSN 1K OHM 5 0 25W 01121 CB1025 84951 315 0512 00 010100 011059 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 5125 R4952 315 0512 00 010100 011079 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 5125 84953 315 0512 00 010100 011144 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 85125 8497 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 R500 315 0511 00 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 R504 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 81025 506 315 0301 00 RES FXD CMPSN 300 OHM 5 0 25W 01121 3015 R508 315 0
59. 25 03 8 010774 CKT BOARD ASSY MAIN 80009 670 4225 03 A13 670 4229 00 010100 010329 BOARD ASSY MAIN 80009 670 4229 00 A13 670 4229 01 010330 010659 BOARD ASSY MAIN 80009 670 4229 01 13 670 4229 02 010660 010773 BOARD ASSY MAIN 80009 670 4229 02 1 A13 670 4229 03 8 010774 CKT BOARD ASSY MAIN 80009 670 4229 03 21 670 4226 00 8010100 8010299 BOARD ASSY TRIGGER 80009 670 4226 00 21 670 4226 01 010300 8010949 BOARD ASSY TRIGGER 80009 670 4226 01 21 670 4226 02 8010950 011059 BOARD ASSY TRIGGER 80009 670 4226 02 21 670 4226 03 011060 BOARD ASSY TRIGGER 80009 670 4226 03 23 670 4226 00 8010100 8010329 BOARD ASSY TRIGGER 80009 670 4226 00 23 670 4226 01 010330 8010969 BOARD ASSY TRIGGER 80009 670 4226 01 23 670 4226 02 010970 011079 BOARD ASSY TRIGGER 80009 670 4226 02 1 23 670 4226 03 8 011080 BOARD ASSY TRIGGER 80009 670 4226 03 A22 670 4226 00 BO10100 5010297 BOARD ASSY TRIGGER 80009 670 4226 00 A22 670 4226 01 8010298 5010773 BOARD ASSY TRIGGER 80009 670 4226 01 A22 670 4226 02 8 010774 011144 BOARD ASSY TRIGGER 80009 670 4226 02 A22 670 4226 03 8 011145 CKT BOARD ASSY TRIGGER 80009 670 4226 03 A31 670 2888 00 010100 010879 BOARD ASSY DISPLAY 80009 670 2888 00 A31 670 2888 01 38010880 CKT BOARD ASSY DISPLAY 80009 670 2888 01 o A33 670 2888 00 8010100 010929 BOARD ASSY DISPLAY 80009 670 2888
60. 250 1032 855 5582511 1032 308 000C0G0470K 301 000T2H180J 187 0109 005 301 055 060100 184721 14721 154152 144152 114152 184152 152 0153 00 184152 1N4152 1N4152 1N4152 152 0153 00 1N4152 1N4152 1N4152 1N4152 1N4152 3 5 Replaceable Electrical Parts DC505A Tektronix Serial Model No Mfr M amp No Part No Eff Dscont Name amp Description Code Mfr Part Number cr4032 152 0141 02 011060 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR403 152 0141 02 XB011080 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 4033 152 0141 02 011145 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR435 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR440 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR445 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR450 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR455 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 4581 152 0141 02 011060 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 cr4582 152 0141 02 011080 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR4583 152 0141 002 XB011145 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR460 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR494 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR495 152 0141 02 011060 SEMICOND DEVICE SILICON 30V 150MA 07910 134152 4952 152 0141 02 111080 SEMICOND DEVICE SILICON
61. 418 Mx104Z1201R0 195 283 0023 00 CAP FXD CER DI 0 1UF 80 20 12V 91418 10421201 0 C200 283 0023 00 CAP FXD CER DI 0 1UF 80 20 12V t 91418 MX10421201R0 C214 283 0006 00 CAP FXD CER DI 0 02UF 80 20 500V 72982 841 541 2032 C220 281 0504 00 CAP FXD CER DI 10PF 1PF 500V 72982 301 055 060100 C222 281 0517 00 CAP FXD CER DI 39PF 3 9PF 500V 72982 308 000C0G0390K C232 283 0003 00 CAP FXD CER DI 0 01UF 80 20 150V 72982 855 558Z5U 103Z C235 283 0023 00 CAP FXD CER DI 0 1UF 80 20 12V 91418 MX104Z1201R0 0245 281 0184 00 VAR PLSTC 2 18PF 500VDC 34553 2222 809 05003 C246 281 0564 00 CAP PXD CER DI 24PF 5 500V 72982 301 000C0G02407 C268 290 0535 00 CAP FXD ELCTLT 3 30 20 10V 56289 1960336 0010 1 C270 283 0023 00 CAP FXD CER DI 0 1UF 80 20 12V 91418 MX104Z1201RO C290 283 0003 00 CAP FXD CER DI 0 01UF 80 20 150V 72982 855 558750 1032 C295 283 0023 00 CAP FXD CER DI 0 1UF 80 20 12V 91418 MX104Z1201R0 C330 283 0023 00 CAP FXD CER DI 0 1UF 80 20 12V 91418 10421201 0 C342 283 0023 00 CAP FXD CER DI 0 1UF 80 20 12V 91418 10421201 0 C345 283 0023 00 CAP FXD CER DI 0 1UF 80 20 12V 91418 10421201 0 C350 283 0023 00 CAP FXD CER DI 0 1UF 80 20 12V 91418 10421201 0 C372 283 0003 00 CAP FXD CER DI 0 01UF 480 20 150V 72982 855 558750 1032 C384 283 0023 00 CAP FXD CER DI 0 1UF 80 20 12V 91418 10421201 0 C388 281 0605 00 CAP FXD CER DI 200PF 10 500V 042
62. 5 0301 00 RES FXD CMPSN 300 OHM 5 0 25W 01121 83035 R252 315 0510 00 RES FXD CMPSN 51 OHM 5 0 25W 01121 5105 R255 311 1567 00 RES VAR NONWIR 100 OHM 20 0 SOW 73138 91A 100ROM R258 315 0181 00 RES FXD CMPSN 180 OHM 5 0 25W 01121 1815 R260 311 1841 00 RES VAR NONWIR 1K OHM 10 1W 01121 14M003 R262 315 0100 00 RES FXD CMPSN 10 OHM 5 0 25W 01121 1005 R264 315 0241 00 RES FXD CMPSN 240 OHM 5 0 25W 01121 2415 R265 315 0241 00 RES FXD CMPSN 240 OHM 5 0 25W 01121 2415 R267 315 0512 00 RES FXD CMPSN 5 1K 5 0 25 01121 5125 R268 315 0101 00 RES FXD CMPSN 100 OHM 5 0 25W 01121 1015 R270 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 R272 315 0101 00 RES FXD CMPSN 100 OHM 5 0 25W 01121 1015 R275 315 0101 00 RES FXD CMPSN 100 OHM 5 0 25W 01121 1015 R278 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 R280 315 0471 00 RES FXD CMPSN 470 OHM 5 0 25W 01121 4715 R2841 315 0511 00 B010100 010299 RES FXD CMPSN 510 OHM 5 0 25W 01121 CB5115 R2841 315 0471 00 8010300 RES FXD CMPSN 470 OHM 5 0 25W 01121 4715 R2842 315 0511 00 010100 B010329 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 2842 315 0471 00 010330 RES FXD CMPSN 470 OHM 5 0 25W 01121 84715 f 82842 315 0511 00 010100 BO10329 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 R2843 315 0471 00 010330 RES FXD CMPSN 470 OHM 5 0 25W 01121 4735 R288 315 0390 00 RES
63. 510 OHM 5 0 25W 01121 5115 R185 315 0151 00 RES FXD CMPSN 150 OHM 5 0 25W 01121 5 5 R1882 315 0152 00 010100 B010299 RES FXD CMPSN 1 5K 5 0 25 01121 1525 R1882 315 0132 00 B010300 RES FXD CMPSN 1 3K OHM 5 0 25W 01121 1325 R1883 315 0152 00 010100 010329 RES FXD CMPSN 1 5K OHM 5 0 25W 01121 1525 81883 315 0132 00 8010330 RES FXD CMPSN 1 3K OHM 5 0 25W 01121 81325 R1884 315 0152 00 010100 B010297 RES FXD CMPSN 1 5K OHM 5 0 25W 01121 1525 R1884 315 0132 00 B010298 RES FXD CMPSN 1 3K OHM 5 0 25W 01121 1325 1902 315 0271 00 010100 011059 RES FXD CMPSN 270 OHM 5 0 25W 01121 2715 1903 315 0271 00 010100 011079 RES FXD CMPSN 270 OHM 5 0 25W 01121 2715 1904 315 0271 00 010100 011144 RES FXD CMPSN 270 OHM 5 0 25W 01121 2715 1912 315 0820 00 011060 RES FXD CMPSN 82 5 0 25 01121 8205 81917 315 0820 00 011080 RES FXD CMPSN 82 5 0 25 01121 88205 81915 315 0820 00 011145 RES FXD CMPSN 82 OHM 5 0 25W 01121 CB8205 R1932 315 0131 00 011060 RES FXD CMPSN 130 OHM 5 0 25W 01121 1315 R1933 315 0131 00 XB011080 RES FXD CMPSN 130 OHM 5 0 25W 01121 CB1315 8193 315 0131 00 011145 RES FXD CMPSN 130 OHM 5 0 25W 01121 1315 R195 315 0273 00 RES FXD CMPSN 27K OHM 5 0 25W 01121 82735 R196 315 0273 00 RES FXD CMPSN 27K OHM 5 0 25W 01121 52735 R200 315 0241 00 RES FXD CMPSN 240 OHM 5
64. 52 CR973 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 9 CR975 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR976 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR978 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 057901 150 1002 00 010100 010879 LAMP LED RDOUT NUMERICAL DISPLAY 50579 DL8L 7902 150 1002 00 010100 B010929X LAMP LED RDOUT NUMERICAL DISPLAY 50579 DL8L 7961 150 1002 00 010100 010879 LAMP LED RDOUT NUMERICAL DISPLAY 50579 DL8L 057962 150 1002 00 010100 010929 LAMP LED RDOUT NUMERICAL DISPLAY 50579 DL8L 257971 150 1024 00 010880 LAMP LED DSPL 2 DIGIT 7 SEGMENT RED 50579 DL882A 087972 150 1024 00 010930 LAMP LED DSPL 2 DIGIT 7 SEGMENT RED 50579 DL882A 8001 150 1002 00 010100 010879 LAMP LED RDOUT NUMERICAL DISPLAY 50579 DL8L 058002 150 1002 00 010100 010929 LAMP LED RDOUT NUMERICAL DISPLAY 50579 DL8L 58061 150 1002 00 010100 010879 LAMP LED RDOUT NUMERICAL DISPLAY 50579 DL8L 8062 150 1002 00 010100 010929 LAMP LED RDOUT NUMERICAL DISPLAY 50579 DL8L 058101 150 1002 00 010100 010879 LAMP LED RDOUT NUMERICAL DISPLAY 50579 DL8L 058101 150 1025 00 010880 LAMP LED DSPL 3 DIGIT 7 SEGMENT RED 50579 DL883A Ds8102 150 1002 00 010100 8 010929 LAMP LED RDOUT NUMERICAL DISPLAY 50579 DL8L 558102 150 1025 00 010930 LAMP LED DSPL 3 DIGIT 7 SEGMENT RED 50579 DL883A 58151 150 1002 00 010100 010879 LAMP LED RDOUT N
65. 5W RES FXD CMPSN 180 OHM 5 0 25W RES FXD CMPSN 2 4K OHM 5 0 25W RES FXD CMPSN 5 1K OHM 5 0 25W RES FXD CMPSN 5 1K RES FXD CMPSN 5 1K RES FXD CMPSN 5 1K RES FXD CMPSN 5 1K RES FXD CMPSN 5 1K OHM 5 0 25W OHM 5 0 25W OHM 55 0 25W OHM 5 0 25W OHM 5 0 25W RES FXD CMPSN 1K OHM 5 0 25W Mfr Code 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 Mfr Part Number 1025 CB3015 CB3015 5115 5115 8215 8215 8215 CB8215 CB8215 CB2015 CB2025 CB3915 CB1025 CB2435 CB1035 CB1035 CB1335 CB1025 CB9105 CB5115 CB1025 CB5115 CB1025 5115 1025 6225 CB3315 5115 6215 1225 5115 5125 5125 CB3325 CB1025 CB2015 CB5105 2015 5105 2015 5105 CB3015 CB2715 51815 CB2425 CB5125 CB5125 CB5125 CB5125 CB5125 CB5125 CB1025 REV A AUG 1977 Replaceable Electrical Parts DC505A 1 Tektronix Serial Model Mfr Dscont Name amp Description Code Mfr Part Number R923 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25
66. 68 7 UG25A 3 i Mc lisk 2 06592 3 53 5 gt RIT BCO OUTPUTS 4 7 5 7474 5 R780 5878 763 R784 5 0715 5 75 75 75 75 75 75 unm I 4 y5 e 275 ik tay 5v 9570 RESET R790 18 apy 7 roc LSD R793 gt gt gt ANODE 2 75 DP 2 gt R794 75 5 Ds 197 QT P740 2 R797 gt ANODE 300 gt ANODE 3 gt ANODE 2 5V lk 5 gt M ANODE 2 azok Q820 gt 329 1 5 8 1 4 22 DISPLAY BOARD SNBOIOBSO 40 SEE APRON FOR BELO 978 Time Stor Generator Leaping Zero Suppression DispLAY D 2 5 0 32 lt caos 19 15 7 6 INDICATES CONTACT CLOSED 5 Q4 le 7427 n Ims La 00 iE i UB 5195 10 7457 aD m os p RASS 1
67. AUG 1977 Serial Model No CAP FXD CER FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER Replaceable Electrical Parts DC505A Name amp Description DI 0 001UF 100 0 500V DI 0 001UF 100 0 500V DI 0 22UF 20 50V DI 0 001UF 100 0 500V DI 0 01UF 80 20 150V DI 0 22UF 20 50V 0 010 80 20 150 DI 0 1UF 20 50V DI 0 1UF 80 20 12V DI 91PF 5 500V DI 0 001UF 100 0 500V DI 0 001UF 300 0 500V 270 5 500 DI 68PF 10 500V DI 0 1UF 20 50V DI 0 01UF 80 20 150V DI 0 0022UF 205 50 DI 0 01UF 80 20 150 0 0470 10 100 CAP FXD ELCTLT 33UF 20 10V CAP FXD ELCTLT 33UF 20 10V CAP FXD CER CAP CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP FXD CER CAP VAR AIR CAP FXD CER DI 0 1UF 20 50V DI 0 1UF 20 50V 0 0270 10 100 100 20 500 0 10 80 20 12 DI 0 01UF 80 20 150 DI 150PF 4 30PF 500V 0 0010 100 0 500 0 0110 80 20 150 0 010 80 20 150 DI 47PF 4 7PF 500V 18 5 500 DI 1 9 15 7PF 250V DI 10PF 1PF 500V
68. AUG 1377 198 DATA GOOD 5 A cCRGAT RG47 FROM 6597 MHz q CRESS 5 5 7404 n gt PIN 7 4 PN PN 2 5 PIN 78 3 52 74175 i4 570 i 8 2 4 0755 7 2 Bj 007 14 74113 12 7 l a 0155 6 ie 5 74 4 9678 fa 14 74175 15 7430 I 12 5 7 6 lt 0755 5 R680 m o 2 ZA a7o Col cRGBO qO gt u 2918 VA Z brusa 210 Salk 5V 1 987 cz ee cess 704 5 8 e U720B 8 CROBS R704 20k t QUTO TP MKS 007P 5v R712 1 UG50E 5 7404 2 4 4 U750A 3 UL5O 5 USB Ce 7401 RESET E Q570 5V OVERFLOW SENSE ROIs 14 9720 sv R718 592415 R735 3 Bra UGIOB 5V Me Conr Ib m nfs 7979 RJ gt 2 8 4 1401 D V T 5 4 1 CREAT 15 q gt CLEAR V 25 RESET UGIOA 3 G570 THIS PAGE R730 R732 Q725 24k 2 4 725 R722 c730 047 4F 1 65 7404 4 14 B AUG 1977 MOS 10
69. CAP FXD CER DI 1UF 80 20 25V 72982 8131N039 1052 13 283 0177 00 010970 CAP FXD CER DI 1UF 80 20 25V 72982 8131N039 1052 c81 283 0177 00 010774 CAP FXD CER DI lUF 80 20 25V 72982 8131N039 E 105Z C104 283 0006 00 CAP FXD CER DI 0 02UF 80 20 500V 72982 841 541 2032 130 283 0504 00 CAP FXD CER DI 10PF 1PF 500V 72982 301 055 060100 C112 281 0517 00 CAP FXD CER DI 39PF 3 9PF 500V 72982 308 000C0G0390K lstandard only 2option 4 only Joption 1 only REV 8 AUG 1977 3 3 Replaceable Electrical Parts DC505A Tektronix Serial Model No Mfr Ckt No Part No Eff Dscont Name amp Description Code Mfr Part Number C122 283 0003 00 CAP FXD CER DI 0 01UF 80 20 150V 72982 855 558250 1032 C125 283 0023 00 CAP FXD CER DI 0 1UF 80 20 12V 91418 MX10421201RO C127 283 0023 00 CAP FXD CER DI 0 1UF 80 20 12V 91418 MX104Z1201R0 C135 281 0184 00 CAP VAR PLSTC 2 18PF 500VDC 34553 2222 809 05003 C136 281 0564 00 CAP FXD CER DI 24PF 5 500V 72982 301 000 0602407 C158 290 0535 00 CAP FXD ELCTLT 33UF 20 10V 56289 196D336X0010KAl C160 283 0023 00 CAP FXD CER DI 0 1UF 80 208 12V 91418 1042120180 C180 283 0003 00 CAP FXD CER DI 0 01UF 80 205 150V 72982 855 558750 1032 C185 283 0023 00 CAP FXD CER DI 0 1UF 80 20 12V 91418 MX10421201R0 C190 283 0023 00 CAP FXD CER 5 0 1 80 205 12 91418 10421201 0 194 283 0023 00 CAP FXD CER DI 0 1UF 80 20 12V 91
70. CMPSN 75 OHM 5 0 25W 01121 7505 R783 315 0750 00 RES FXD CMPSN 75 OHM 5 0 25W 01121 7505 R784 315 0750 00 RES FXD CMPSN 75 OHM 5 0 25W 01121 7505 R785 315 0750 00 RES FXD CMPSN 75 OHM 5 0 25W 01121 7505 R786 315 0750 00 RES FXD CMPSN 75 OHM 5 0 25W 01121 7505 R790 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 R791 315 0301 00 RES FXD CMPSN 300 OHM 5 0 25W 01121 3015 R793 315 0750 00 RES FXD CMPSN 75 OHM 5 0 25W 01121 7505 R794 315 0750 00 RES FXD CMPSN 75 OHM 5 0 25W 01121 87505 R796 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 81025 R797 315 0301 00 RES FXD CMPSN 300 OHM 5 0 25W 01121 CB3015 R800 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 R801 315 0301 00 RES FXD CMPSN 300 OHM 5 0 25W 01121 CB3015 R803 315 0750 00 RES FXD CMPSN 75 5 0 25 01121 87505 R804 315 0750 00 RES FXD CMPSN 75 OHM 5 0 25W 01121 87505 R806 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 R8072 315 0301 00 RES FXD CMPSN 300 OHM 5 0 25W 01121 CB3015 R810 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 R811 315 0301 00 RES FXD CMPSN 300 OHM 5 0 25W 01121 3015 R813 315 0750 00 RES FXD CMPSN 75 OHM 5 0 25W 01121 7505 R815 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 R816 315 0301 00 RES FXD CMPSN 300 5 0 25 01121 CB3015 3 17 Replaceable Electrical Parts DC505A Ckt No R820 R821 R8221 R825 R830
71. DI QUAD 2 INPUT POS NAND GATE 01295 SN7400N 590 156 0118 00 MICROCIRCUIT DI J K MASTER SLAVE FLIP FLOP 01295 SN74S112N U610 156 0041 00 MICROCIRCUIT DI DUAL D TYPE FLIP FLOP 27014 DM7474N 1620 156 0030 00 MICROCIRCUIT DI QUAD 2 INPUT POS NAND GATE 01295 SN7400N 0625 156 0460 00 MICROCIRCUIT DI QUAD 2 INPUT OPEN COLL OUT 01295 SN7409N 0630 156 0058 00 MICROCIRCUIT DI HEX INVERTER 01295 SN7404N 0650 156 0058 00 MICROCIRCUIT DI HEX INVERTER 01295 SN7404N 0652 156 0398 00 MICROCIRCUIT DI QUAD LATCH W TRI STATE OUT 27014 DM8551N U655 156 0323 00 MICROCIRCUIT DI HEX INVERTER 01295 SN74SO4N U657 156 0030 00 MICROCIRCUIT DI QUAD 2 INPUT POS NAND GATE 01295 SN7400N U675 156 0395 00 MICROCIRCUIT DI DECADE COUNTER 01295 SN7490AN 676 156 0398 00 MICROCIRCUIT DI QUAD LATCH W TRI STATE OUT 27014 DM8551N 0678 156 0395 00 MICROCIRCUIT DI DECADE COUNTER 01295 SN7490AN 679 156 0398 00 MICROCIRCUIT DI QUAD LATCH W TRI STATE OUT 27014 DM8551N 700 156 0409 00 MICROCIRCUIT DI 4 DIGIT DEC DECODER 50088 5007 0715 156 0057 00 MICROCIRCUIT DI QUAD 2 INPUT NAND GATE 07263 7401PC 0720 156 0041 00 MICROCIRCUIT DI DUAL D TYPE FLIP FLOP 27014 DM7474N U750 156 0041 00 MICROCIRCUIT DI DUAL D TYPE FLIP FLOP 27014 DM7474N U755 156 0111 00 MICROCIRCUIT DI SGL BCD TO DEC DEC DRIVER 01295 SN74145N 0760 156 0171 00 MICROCIRCUIT DI QUAD 2 INPUT OR GATE 01295 SN7432N 765 156 0041 00 MICROCIRCUIT DI DUAL D TYPE FLIP FLOP 27014 DM7474N 0780 156 0128 00 MICROCIRCUIT
72. DI SGL BCD TO 7 SEG DCDR DRVR 01295 SN7447AN U835 156 0230 00 MICROCIRCUIT DI DUAL D MA SLAVE FLIP FLOP 80009 156 0230 00 U845 156 0230 00 MICROCIRCUIT DI DUAL D MA SLAVE FLIP FLOP 80009 156 0230 00 855 156 0395 00 MICROCIRCUIT DI DECADE COUNTER 01295 SN7490AN 0856 156 0124 00 MICROCIRCUIT DI SGL FREQ PHASE DETECTOR 80009 156 0124 00 U875 156 0266 00 MICROCIRCUIT LI EMITTER COUPLED OSCILLATOR 80009 156 0266 00 U880 156 0047 00 MICROCIRCUIT DI TPL 3 INPUT POS NAND GATE 80009 156 0047 00 U895 156 0410 00 MICROCIRCUIT DI COUNTER TIME BASE i 50088 MK5009P u9oo1 156 0030 00 MICROCIRCUIT DI QUAD 2 INPUT POS NAND GATE 01295 SN7400N 09012 156 0395 00 MICROCIRCUIT DI DECADE COUNTER 01295 SN7490AN 0920 156 0043 00 MICROCIRCUIT DI QUAD 2 INPUT POS NOR GATE 80009 156 0043 00 0922 156 0178 00 MICROCIRCUIT DI TRIPLE 3 INPUT NOR GATE 01295 SN7427N 0925 156 0150 00 MICROCIRCUIT DI QUAD 2 INPUT POS NAND BFR 01295 SN7437N VR341 152 0217 00 010950 SEMICOND DEVICE ZENER 0 4W 8 2V 5 80009 152 0217 00 VR342 152 0217 00 8010970 SEMICOND DEVICE ZENER O 4W 8 2V 5 80009 152 0217 00 VR343 152 0217 00 010774 SEMICOND DEVICE ZENER 0 4W 8 2V 5 80009 152 0217 00 VR42 152 0227 00 SEMICOND DEVICE ZENER 0 4W 6 2V 5 80009 152 0227 00 VR55 152 0226 00 SEMICOND DEVICE ZENER 0 4W 5 1V 5 81483 69 6584 VR165 152 0217 00 SEMICOND DEVICE ZENER 0 4W 8 2V 5 80009 152 0217 00 VR170 152 0226 00 SEMICOND DEVICE ZENER 0 4W 5 1V 5 81483 69 6584 VR180 152 0226 00
73. E SEE 590 EPL SUBPANEL FRONT ATTACHING PARTS SCR TPG THD FOR 6 20 0 375 100 DEG FLH STLL SCR TPG THD FOR 6 32 X 0 50 DEG FLH ST du So PUSH BUTTON GRAY SLOPE PUSH BUTTON GRAY X20 ATTEN PUSH BUTTON AC COUPL SHLD ELECTRICAL ATTACHING PARTS SCREW MACHINE 6 32 X 0 188 INCH PNH STL POST ELEC MECH HEX 0 25 X 0 562 INCH NUT PLAIN HEX 6 32 X 0 25 INCH BRS SCREW MACHINE 6 32 X 0 50 INCH PNH STL SPACER SLEEVE 0 18 ID X 0 25 INCH LONG CONNECTOR RCPT 50 OHM MALE SNAP ON BRACKET CKT CD ATTACHING PARTS NUT PLAIN EXT W 4 40 X 0 25 INCH STL Mfr Code 80009 80009 74445 80009 74445 80009 74445 80009 80009 73743 79807 80009 80009 73743 78471 80009 60009 80009 80009 80009 45722 80009 83385 00779 73279 60009 63385 83385 80009 80009 80009 80009 83385 80009 73743 83385 80009 98291 80009 78189 Mfr Part Number 337 1399 04 366 1031 05 OBD 366 1170 01 OBD 366 0494 00 OBD 366 1422 01 214 1840 00 2 20224 402 OBD 210 0255 00 358 0029 00 OBD OBD 426 0681 00 426 0916 00 333 1774 01 331 0314 00 214 1513 01 OBD 337 1872 00 2 330808 7 4352 1 0318 386 2671 01 OBD OBD 366 1257 28 366 1489 66 366 1257 27 337 1897 00 OBD 384 0519 00 3038 0228 402 OBD 166 0031 00 051 043 0349 407 1352 00 ORD 6 3 Replaceable Mechanical Parts DC505A Fig
74. EEL OVH OVAL HEAD STL STEEL PH BRZ PHOSPHOR BRONZE Sw SWITCH PL PLAIN or PLATE T TUBE PLSTC PLASTIC TERM TERMINAL PN PART NUMBER THD THREAD PNH PAN HEAD THK THICK PWR POWER TNSN TENSION RCPT RECEPTACLE TPG TAPPING RES RESISTOR TRH TRUSS HEAD RGD RIGID VOLTAGE RLF RELIEF VAR VARIABLE RTNR RETAINER WITH SCH SOCKET HEAD WSHR WASHER SCOPE OSCILLOSCOPE XFMR TRANSFORMER SCR SCREW XSTR TRANSISTOR Replaceable Mechanical Parts DC 505A Mfr Code 00779 01295 08261 12360 15912 22526 45722 71279 73743 73803 74445 78189 78471 79136 79807 80009 83385 97464 98291 6 2 CROSS INDEX MFR CODE NUMBER TO MANUFACTURER Manufacturer AMP INC TEXAS INSTRUMENTS INC SEMICONDUCTOR GROUP SPECTRA STRIP CORP ALBANY PRODUCTS CO DIV OF PNEUMO DYNAMICS CORPORATION ANSLEY ELECTRONICS CORP A SUB OF THOMAS AND BETTS CORP BERG ELECTRONICS INC USM CORP PARKER KALON FASTENER DIV CAMBRIDGE THERMIONIC CORP FISCHER SPECIAL MFG CO TEXAS INSTRUMENTS INC METALLURGICAL MATERIALS DIV HOLO KROME CO ILLINOIS TOOL WORKS INC SHAKEPROOF DIVISION TILLEY MFG CO WALDES KOHINOOR INC WROUGHT WASHER MFG CO TEKTRONIX INC CENTRAL SCREW CO INDUSTRIAL RETAINING RING CO SEALECTRO CORP Address P O BOX 3608 P O BOX 5012 13500 N CENTRAL EXPRESSWAY 7100 LAMPSON AVE 145 WOODWARD AVENUE 3208 HUMBOLDT ST YOUK EXPRESSWAY 445 CONCORD AVE 446 MORGAN ST 34 FOREST
75. H BRS BEARING CAM SW REAR LEVER SLIDE SW ATTACHING PARTS FOR EACH RING RETAINING 0 114 FREE IDX 0 025 INCH PLATE LEVER MTG ATTACHING PARTS NUT PLAIN HEX 2 56 X 0 188 INCH BRS WASHER LOCK INTL 0 092 ID X 0 18 0D STL WASHER FLAT 0 09 ID X 0 188 OD BRS EXTENSION SHAFT LEVER SWITCH REAR EXTENSION SHAFT LEVER SWITCH CKT BOARD ASSY MAIN SEE Al EPL ASSY SL SW EACH ACTUATOR INCLUDES COUPLING SHAFT SLIDE SWITCH SPRING FLAT GREEN COLORED ROLLER DETENT 0 125 DIA X 0 125 INCH L ACTUATOR SWITCH GUIDE SLIDE SW CONTACT ELEC CKT CD SW SPR CONTACT ELEC 0 365 L X 0 25 BRZ GOLD PL SOCKET PIN TERM 0 188 INCH LONG SOCKET PLUG IN 16 CONTACT LOW CLEARANCE SOCKET PLUG IN 14 CONTACT LOW CLEARANCE SOCKET PLUG IN 14 CONTACT LOW CLEARANCE TERM TEST PT 0 40 INCH LONG TERM TEST PT 0 40 INCH LONG SWITCH SLIDE SEE 5900 EPL SWITCH PUSH SEE 8545 5575 EPL SPACER PB SW BROWN 0 275 INCH LONG CLIP ELECTRICAL FOR 0 25 INCH DIA FUSE OSCILLATOR RF SEE 901 EPL ATTACHING PARTS WASHER NONMETAL 0 094 ID X 0 312 OD TEFLON ax dmn ey WIRE SET ELEC CONTACT ELEC 0 48 L 22 26 AWG WIRE WIRE ELECTRICAL 5 WIRE RIBBON CONN BODY PL EL 5 WIRE GREEN WIRE SET ELEC CONTACT ELEC 0 48 L 22 26 AWG WIRE WIRE ELECTRICAL 5 WIRE RIBBON CONN BODY PL EL 5 WIRE GREEN EXTENSI
76. IDE 0 5A 125VAC 10389 23 021 309 5100 311 1841 00 RES VAR NONWIR 1K OHM 10 1W 01121 14 003 S105A B 260 1466 00 SWITCH PUSH DPDT 2 STA NON SHORT 80009 260 1466 00 S185 260 1445 000 SWITCH PUSH PP l STA NON SHORT 80009 260 1445 00 5195 263 1016 00 DRUM ASSY CAM 5 80009 263 1016 00 52102 311 1841 00 RES VAR NONWIR 1K OHM 10 1W 01121 14M003 215 260 1466 00 SWITCH PUSH DPDT 2 STA NON SHORT 80009 260 1466 00 295 260 445 00 SWITCH PUSH PP 1 STA NON SHORT 80009 260 1445 00 475 311 1431 00 RES VAR NONWIR 500K OHM 10 0 25W 01121 GH8032 545 260 1465 00 SWITCH PUSH 2 STA NON SHORT 80009 260 1465 00 575 8895 105 0587 00 ACTR ASSY SL SW 80009 105 0587 00 900 260 0723 00 SWITCH SLIDE DPDT 0 5A 125VAC 79727 126 0028 5950 105 0587 00 ACTR ASSY SL SW 80009 105 0587 00 010 156 0071 00 MICROCIRCUIT LI VOLTAGE REGULATOR 07263 7235 U30 156 0071 00 MICROCIRCUIT LI VOLTAGE REGULATOR 07263 7235 090 156 0158 00 MICROCIRCUIT LI DUAL OPERATIONAL AMPLIFIER 80009 156 0158 00 0190 156 0353 00 MICROCIRCUIT DI TPL 2 INPUT EXCL OR GATE 04713 MC1672L A U195 156 0205 00 MICROCIRCUIT DI QUAD 2 INPUT NOR GATE 80009 156 0205 00 200 156 0226 00 MICROCIRCUIT DI QUAD 2 INPUT NOR GATE 80009 156 0226 00 0315 156 0230 00 MICROCIRCUIT DI DUAL D MA SLAVE FLIP FLOP 80009 156 0230 00 0340 156 0226 00 MICROCIRCUIT DI QUAD 2 INPUT NOR GATE 80009 156 0226 00 U342 156 0228 00 MICROCIRCUIT DI MASTER SLAVE TYPE D F F 80009 156 0228 00 U345 156 0282 00 MIC
77. IME 8 10 ns SELECT IRCUIT B OR FREQ SELECT us SELECT 1 us to 1 ms SELECT MANUAL SELECT RATE AL SHAPING DISABLE SLOPE GATE GATE TIME GENERATOR SELECT TIMING OUT 100 MHz OSC amp PHASE LOCK COR LECT REST 1 a MEN DISPLAY DISPLAY A TIME TIME MANUAL CIRCUIT CONTROL BOARD BOARD SECONDARY MAIN oa a K RII 8 4 RE _ 22 LEVEL OUT CH A CH B REV A MAR 1977 CH A INPUT OFFSET BIAS AND GAIN CH 4 16 17 INT SOURCE PULL BOR OUT B INPUT gt 168 ane 17B INT SOURCE PULL ATTEN amp OUPL SIGNAL SHAPING amp SLOPE LEVEL WIDTH OR PERIOD amp N SELECT 105 10 DDU s GATE SIGNAL SELECT COUPL SIGNAL SHAPING amp SLOPE LEVEL BLOCK DIAGRAM DC 505A PARTS LOCATIC A 5 D E F G TRIGGER BOARD PARTS LOCATI
78. IST CHANGES CHANGE TO A4 670 4227 01 CKT BOARD ASSY LEVEL OUT 090 156 0158 01 MICROCIRCUIT LI DUAL OPERATIONAL AMPLIFIER SEL MECHANICAL PARTS LIST CHANGES 136 0514 00 1 SOCKET PLUG IN MICROCIRCUIT 8 CONTACT
79. K OHM 58 0 25W RES FXD FILM 1 58K OHM 1 0 25W RES FXD CMPSN 2 7K OHM 5 0 25W RES FXD CMPSN 2 7K OHM 5 0 25W RES FXD CMPSN 5 1K OHM 5 0 25W RES FXD CMPSN 39 OHM 5 0 25W RES FXD CMPSN 5 1K OHM 5 0 25W RES FXD CMPSN 39 OHM 5 0 25W RES FXD CMPSN 5 1K OHM 5 0 25W RES FXD CMPSN 39 OHM 55 0 25W RES FXD CMPSN 20K OHM 5 0 258 RES PXD CMPSN 2K OHM 55 0 258 RES FXD CMPSN 20K OHM 58 0 258 RES FXD CMPSN 2K OHM 5 0 25W RES FXD CMPSN 20K OHM 5 0 25W RES FXD CMPSN 2K OHM 5 0 25W RES FXD CMPSN 200 OHM 5 0 25W RES FXD CMPSN 200 OHM 5 0 25W RES FXD CMPSN 200 OHM 5 0 25W RES FXD CMPSN 30K OHM 5 0 25W RES FXD PILM 75K OHM 1 0 125W RES FXD FILM 1 02K OHM 1 0 25W RES VAR NONWIR 50K OHM 20 0 50W RES VAR NONWIR 25K OHM 20 0 50W RES FXD FILM 121K OHM 1 0 125W RES FXD FILM 39 2K OHM 1 0 125W RES FXD CMPSN 30K OHM 5 0 25W RES FXD FILM 75K OHM 1 0 125W RES VAR NONWIR 50K OHM 20 O SOW RES VAR NONWIR 25K OHM 205 0 5OW RES FXD FILM 121K OHM 1 0 125W RES FXD FILM 39 2K OHM 1 0 125W RES FXD CMPSN 51 OHM 5 0 25W RES FXD CMPSN 24 OHM 5 0 25W RES FXD CMPSN 1K OHM 5 0 25W RES FXD FILM 950K OHM 0 5 0 25W RES FXD CMPSN 51 OHM 5 0 25W RES FXD FILM 54 9K OHM 1 0 125W RES FXD FILM 1M OHM 1 0 125W RES FXD CMPSN LOK OHM 5 0 25W RES FXD CMPSN 270 OHM 5 0 25W RES FXD CMPSN 510 OHM 5 0 25W RES FXD CMPSN 390 OHM 5 0
80. LONG 22526 75060 198 3612 00 XB010950 1 WIRE SET ELEC 80009 198 3612 00 198 3612 002 010970 1 WIRE SET ELEC 80009 198 3612 00 198 3612 00 xB010774 1 WIRE SET ELEC 80009 198 3612 00 64 131 0707 00 6 CONTACT ELEC 0 48 L 22 26 AWG WIRE 22526 75691 005 65 352 0161 01 1 CONN BODY PL EL 3 WIRE BROWN 80009 352 0161 01 352 0161 02 1 CONN BODY PL EL 3 WIRE RED 80009 352 0161 02 66 175 0826 000 FT WIRE ELECTRICAL 3 WIRE RIBBON 80009 175 0826 00 672 0547 00 1 BOARD ASSY MAIN W CAM SW 80009 672 0547 00 672 0548 001 1 BOARD ASSY MAIN W CAM SW 80009 672 0548 00 67 384 0461 00 1 EXTENSION SHAFT MAIN W CAM 80009 384 0461 00 68 376 0051 01 1 CPLG SHAFT FLEX FOR 0 125 INCH DIA SHAFTS 80009 376 0051 01 213 0048 00 4 SETSCREW 4 40 X 0 125 INCH HEX SOC STL 74445 OBD 69 1 RES VARIABLE SEE R475 EPL ATTACHING PARTS 70 210 0583 00 1 NUT PLAIN HEX 0 25 32 X 0 312 INCH BRS 73743 2 20224 402 71 210 0046 00 1 WASHER LOCK INTL 0 26 ID X 0 40 OD STL 78189 1214 05 00 0541 me ae 72 407 0579 00 1 BRKT RES MTG 80009 407 0579 00 1 ACTUATOR ASSY SEE 195 EPL ATTACHING PARTS 73 211 0116 00 4 SCR ASSEM WSHR 4 40 X 0 312 INCH PNH BRS 83385 lstandard only 0ption l only 3option 4 only 6 4 lt X REV 8 AUG 1977 5 C 80 81 82 83 89 90 91 92 93 94 95
81. N 510 RES FXD CMPSN 820 RES FXD CMPSN 820 RES FXD CMPSN 820 RES FXD CMPSN 820 RES FXD CMPSN 820 OHM 55 0 258 OHM 58 0 25W OHM 5 0 258 OHM 53 0 25W OHM 58 0 25W OHM 5 0 25W OHM 58 0 25W OHM 53 0 258 OHM 5 0 25W RES FXD CMPSN 200 OHM 5 0 25W RES FXD CMPSN 2K OHM 5 0 25W RES FXD CMPSN 390 OHM 5 0 25W RES FXD CMPSN 1K OHM 58 0 25W RES FXD CMPSN 24K OHM 5 0 25W RES FXD CMPSN 10K OHM 5 0 25W RES FXD CMPSN 10K OHM 5 0 25W RES FXD CMPSN 13K OHM 5 0 25W RES FXD CMPSN 1K OHM 5 0 25W RES FXD CMPSN 91 OHM 5 0 25W RES FXD CMPSN 510 OHM 55 0 25W RES FXD CMPSN 1K OHM 5 0 25W RES FXD CMPSN 510 OHM 5 0 25W RES FXD CMPSN 1K OHM 5 0 25W RES FXD CMPSN 510 OHM 5 0 25W RES FXD CMPSN 1K OHM 5 0 25W RES FXD CMPSN 6 2K OHM 55 0 25W RES FXD CMPSN 330 OHM 55 0 25W RES FXD CMPSN 510 OHM 55 0 25W RES FXD CMPSN 620 OHM 5 0 25W RES FXD CMPSN 1 2K OHM 5 0 25W RES FXD CMPSN 510 OHM 5 0 25W RES FXD CMPSN 5 1K OHM 55 0 25W RES FXD CMPSN 5 1K OHM 5 0 25W RES FXD CMPSN 3 3K OHM 55 0 25W RES FXD CMPSN 1K OHM 5 25W RES FXD CMPSN 200 OHM 5 0 25W RES FXD CMPSN 51 OHM 5 0 25W RES FXD CMPSN 200 OHM 5 0 25W RES FXD CMPSN 51 OHM 5 0 25W RES FXD CMPSN 200 OHM 5 0 25W RES FXD CMPSN 51 OHM 5 0 25W RES FXD CMPSN 300 OHM 5 0 25W RES FXD CMPSN 270 OHM 5 0 2
82. ON GRID TRIGGER CIRCUIT BOARD R395 R388 R200 88 C342 390 1 JE HBB PY te Lod ted 96 831919 440 a 445 2 0345 U342 39 6 6 51 fol SIEGE sra rueda Ke 61 n fs i SEIS JAE SES SSE vaso 2 itis lt viej r 9 9 3 6 lollo aa o je reete PCI RTT E x 63440 Q450 6445 455 420 9 9 sils Hic lelte lel lof lel 1153 64 9 vir iat gt BSP Odd oes CONG AIG Been p M 8118111811 3 3 0455 SISIS 410 HE e 495 eir ole W RIR 8191818 E 588588 881872122815 T 1731 0590 ale is clsels 555 9 sie 0315 6430 518191979809 4 142 4 5 4 vir BS g3 mmm gt 4 ass Te Ele 5 506 vro 8 8 580 5 2450 N olo 500 2 2 5 49 iui ie ra 5 ELE zd o 2 SL EUST mete Ny SAYS
83. ON SHAFT 0 95 INCH LONG SPRING GROUND FLAT FR SECT PLUG IN TOP TRANSISTOR SEE 010 amp 030 EPL ATTACHING PARTS FOR EACH SCREW MACHINE 4 40 X 0 312 100 DEG FLH STL SCREW MACHINE 4 40 X 0 312 100 DEG FLH STL SCREW MACHINE 4 40 X 0 312 100 DEG FLH STL Mfr Code 80009 73743 80009 80009 80009 79136 80009 73743 80009 80009 97464 80009 73743 78189 12360 80009 80009 80009 80009 80009 80009 80009 80009 80009 22526 22526 01295 01295 01295 80009 80009 80009 80009 80009 80009 22526 08261 80009 80009 22526 08261 80009 80009 80009 80009 83385 83385 83385 Mfr Part Number 200 1332 00 2 12161 402 214 1704 01 214 1127 00 105 0516 00 5103 25 MD R 401 0155 00 2X12161 402 401 0156 00 214 1962 00 1000 15 386 2709 00 2X12157 402 1202 00 00 0541C OBD 384 1242 00 384 1160 01 105 0587 00 376 0156 00 214 1126 01 214 1127 00 105 0504 00 351 0355 00 131 0604 00 47357 75060 C931602 C931402 C931402 214 0579 00 214 0579 00 361 0382 00 344 0154 00 210 1014 00 198 3030 00 75691 005 OBD 352 0163 05 198 3033 00 75691 005 OBD 352 0163 05 384 1136 00 214 1061 00 426 0725 05 OBD OBD OBD Replaceable Mechanical Parts DC505A Fig amp Index Tektronix Serial Model No Mfr No Part No Eff Dscont Qty 12345 Name amp Description Code Mfr Part Number 1 113 210 0551 001xB010950 1 NUT PLAIN HEX 4 40 X 0 25 INCH STL 83385 085 2
84. OP button in and adjust the CH A LEVEL control until a count begins to advance The accumulated count is displayed in whole numbers Only the CH A trigger controls The RESET button and the IN START OUT STOP button affect the display Stopping the Count If the START OUT STOP button is released and no other controls are operated the last total will continue to be displayed No more incoming events will be added to the total Restarting and Resetting When the IN START OUT STOP is again depressed incoming events will advance the displayed total Resetting the count to zero can be done at any time by pressing the RESET button 1 9 Operating Instructions DC 505A FUNCTIONS AVAILABLE AT REAR CONNECTOR Customizing the Interface Unassigned pins are available at the rear connector for routing signals to and from the DC 505A for specialized applications see Rear Connector Pin Assignments in Section 5 One or more compartments of a multi plug in Power Module can be wired with barriers installed to provide specific functions between compartments See Power Module instruction manual for additional informa tion Control Lines These lines allow the user to externally command the DC 505A to certain operating conditions A Reset input line which doubles as an output signal line clears the counter to zero when a low is applied to it An input line to disable the flashing overflow display also doubles as
85. OTE For an Option 1 DC 505A follow essentially the same procedure as called out in steps 2a and 2b except use a 1 MHz Frequency Standard 1 part in 10 and set os cilloscope time base to 10 ns div Remove the slotted plug from the oscillator and adjust an interior hex type tuning slug for a minimum horizontal drift of 5 div 10 sec or less If replacing the slotted plug in the oscillator causes the drift to exceed 5 div 10 sec readjust the tuning slug so that the drift is within 5 div 10 sec with slotted plug installed adrift of 5 div 10 sec using 10 ns div sweep rate is equivalent to 5 parts in 10 Trace drifting to the right is a positive error drift to the left is a negative error REV A MAR 1977 3 Check Adjust Phase Lock Voltage Connect DM 501 Digital Voltmeter positive leadto the junction of R870 and CR870 negative lead to ground Check that the voltage reading is between 2 2 V and 2 9 V If necessary adjust the spacing of coil L870 to obtain a voltage reading of 2 6 V Dis connect voltmeter 4 Adjust Check CH A LEVEL Center a Connect output of SG 503 to CH A INPUT of the DC 505A Terminate SG 503 cable with 50 O feedthrough termination Select a 150 mV peak to peak 3 MHz signal from the SG 503 Set DC 505A FUNCTION switch to FREQUENCY A 0 1 s GATE TIME Set CH A controls for X1 ATTEN AC COUPL SLOPE and center the dot of the LEVEL control with knob pushed in b Adjust R255 until the readout displays 3
86. Only the voltage polarities and SLOPE or e am c L m m qe e mM ae SLOPE selection need be considered when determining triggering levels not illustrated in Fig 1 3 When making these measurements each channel must be DC COU PLED and coaxial cables must be terminated properly in order to maintain signal fidelity WIDTH B Mode order to measure pulse duration Fig 1 3 waveform 3 the 50 level must be determined Apply the input signal to CH B use X1 ATTEN and set FUNCTION switch to WIDTH B Set CH B LEVEL control fully counter clockwise clockwise for input signals below ground GATE light must be out NOTE Rotating a level control moves the triggering hysteresis window up or down through the peak to peak amplitude swing of an input signal Any time that the GATE light is out the hysteresis window is outside the signal limits and the counter is not triggered The hysteresis window is typically about 40 mV A LEVEL SET B LEVEL 0 SET 90 Operating Instructions DC 505A Rotate CH B LEVEL control until the GATE light just comes on and record the first DVM reading Continue rotating CH BLEVEL control until the GATE light just goes out and record the second DVM reading If the GATE light does not go out reduce input signal amplitude or use X20 ATTEN Subtract first DVM reading from second reading to obtain the pea
87. P 04713 2N2907A Q800 151 0301 00 TRANSISTOR SILICON PNP 04713 2N2907A Q806 151 0301 00 TRANSISTOR SILICON PNP 04713 2N2907A Q810 151 0301 00 TRANSISTOR SILICON PNP 04713 2N2907A 0815 151 0301 00 TRANSISTOR SILICON PNP 04713 2N2907A Q820 151 0301 00 TRANSISTOR SILICON PNP 04713 2N2907A 9825 151 0342 00 TRANSISTOR SILICON PNP 80009 151 0342 00 0850 151 0220 00 TRANSISTOR SILICON PNP 80009 151 0220 00 9854 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 0865 151 1042 00 SEMICOND DVC SE MATCHED PAIR FET 80009 151 1042 00 0885 151 0342 00 TRANSISTOR SILICON PNP 80009 151 0342 00 9930 151 0341 00 TRANSISTOR SILICON NPN 07263 8040065 9935 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 0936 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 0937 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 lstandard only 20ption l only REV B AUG 1977 Replaceable Electrical Parts DC505A Tektronix Serial Model No Mfr Ckt No PartNo Eff Dscont Name amp Description Code Mfr Part Number Q938 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q939 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q940 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 0941 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q942 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q943 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190 01 Q944 151 0190 01 TRANSISTOR SILICON NPN 80009 151 0190
88. PERIOD averaging the first positive edge opens the GATE and 10 or 100 or 1 000 positive pulses later the GATE closes The settings of the FUNCTION switch S195 that measure width include TIME and EVENTS A DURING B as well as WIDTH B For width measurements the GATE opens on the first positive edge and closes on the selected negative edge following The selection made at the front panel by the N switch 8950 may be the first negative edge following if 10 is chosen or 10 negative edges later for 10 or 100 later for 10 etc Gate and Control Logic Generator The GATE generator uses the averaged signal from the averaging dividers to generate the gating for timing measurements that goes to the first Decade Counting Unit DCU The signal at pin 9 of U495D is transferred through to the GATE generator U590 and then through the rest of the gating circuitry to pin 11 of U342 The very fast counting capability of the DC 505A requires synchronization of the GATE pulse This is necessary due to the propagation delay of the Averaging Divider which varies with the amount averaged U497 U500 and U495 are the signal paths in the synchronization circuitry The GATE open or start pulse originates as a resultofa signal from B or Select The same signa that supplies the input to the Width or Period Selection gates A positive going edge into pin 9 enables U390 causing a pulse to be coupled across Q420 through the Averaging
89. PROD DIV TRI ORDINATE CORPORATION UNION CARBIDE CORPORATION MATERIALS SYSTEMS DIVISION FAIRCHILD SEMICONDUCTOR A DIV OF FAIRCHILD CAMERA AND INSTRUMENT CORP TELEDYNE SEMICONDUCTOR GENERAL ELECTRIC CO MINIATURE LAMP PRODUCTS DEPARTMENT CHICAGO SWITCH INC NATIONAL SEMICONDUCTOR CORP AMPEREX ELECTRONIC CORP COMPONENT DIV MOSTEK CORP OPCOA DIVISION OF IDS LITRONIX INC SPRAGUE ELECTRIC CO BLILEY ELECTRIC CO BUSSMAN MFG DIVISION OF MCGRAW EDISON CO ERIE TECHNOLOGICAL PRODUCTS INC BECKMAN INSTRUMENTS INC HELIPOT DIV JOHNSON E CO TRW ELECTRONIC COMPONENTS IRC FIXED RESISTORS PHILADELPHIA DIVISION C W INDUSTRIES TEKTRONIX INC INTERNATIONAL RECTIFIER CORP MALLORY CAPACITOR CO DIV OF P R MALLORY AND CO INC RADIO MATERIALS COMPANY DIV OF P R MALLORY AND COMPANY INC DALE ELECTRONICS INC SEALECTRO CORP Address P O BOX 128 1201 2ND STREET SOUTH BOX 5012 33500 CENTRAL EXPRESSWAY O BOX 867 19TH AVE SOUTH 5005 E MCDOWELL RD PO BOX 20923 343 SNYDER AVENUE 11901 MADISON AVENUE 464 ELLIS STREET 12515 CHADRON AVE NELA PARK 2035 WABANSIA AVE 2900 SEMICONDUCTOR DR 35 HOFFMAN AVE 1400 UPFIELD DR 330 TALMADGE ROAD 19000 HOMESTEAD RD 2545 W GRANDVIEW BLVD 2536 W UNIVERSITY ST 644 W 12TH ST 2500 HARBOR BLVD 299 10TH AVE S W 401 N BROAD ST 550 DAVISVILLE RD P O BOX 96 P O BOX 500 9220 SUNSET BLVD 3029 E
90. PSN 18K OHM 5 0 25W 01121 53835 R6151 315 0273 00 B010630 RES FXD CMPSN 27K 5 0 25 01121 2735 R6152 315 0183 00 010100 010659 RES FXD CMPSN 18K OHM 5 0 25W 01121 1835 R6152 315 0273 00 010660 RES FXD CMPSN 27K OHM 5 0 25W 01121 82735 86152 315 0183 00 010100 8010642 RES FXD CMPSN 18K OHM 5 0 25W 01121 1835 66153 315 0273 00 010643 RES FXD CMPSN 27K OHM 5 0 25W 01121 2735 622 315 0202 00 RES FXD CMPSN 2K OHM 5 0 25W 01121 82025 623 315 0202 00 RES FXD CMPSN 2K OHM 5 0 25W 01121 2025 R625 315 0511 00 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 R628 315 0202 00 RES FXD CMPSN 2K OHM 5 0 25W 01121 2025 R629 315 0202 00 RES FXD CMPSN 2K OHM 5 0 25W 01121 82025 R632 315 0101 00 RES FXD CMPSN 100 OHM 5 0 25W 01121 1015 R635 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 5125 R637 315 0241 00 RES FXD CMPSN 240 OHM 5 0 25W 01121 2415 R640 315 0471 00 RES FXD CMPSN 470 OHM 5 0 25W 01121 4715 R642 315 0511 00 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 R644 315 0302 00 RES FXD CMPSN 3K OHM 5 0 25W 01121 3025 R647 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 5125 R655 315 0511 00 RES FXD CMPSN 510 OHM 5 0 25W 01121 CB5115 R656 315 0302 00 RES FXD CMPSN 3K OHM 5 0 25W 01121 CB3025 R660 315 0511 00 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 R662 315 0302 00 RES FXD CMPSN 3K OHM 5 0 25W 01121 3025 R664 315 01
91. RES FXD CMPSN 10K OHM 5 0 25W RES FXD CMPSN 100 OHM 53 0 25W RES FXD CMPSN 1 5K 5 0 25 RES FXD CMPSN 5 1K OHM 5 0 25W RES FXD CMPSN 1 5K OHM 5 0 258 RES FXD CMPSN 5 1K OHM 5 0 258 RES FXD CMPSN 1 5 OHM 55 0 258 RES FXD CMPSN 5 1K OHM 5 0 258 RES FXD CMPSN 1 5K OHM 5 0 258 RES PXD CMPSN 5 1K OHM 5 0 25W RES FXD CMPSN 1 5K OHM 5 25W RES FXD CMPSN 5 1K OHM 5 0 25W RES FXD CMPSN 2 4K OHM 53 0 25W RES FPXD CMPSN 1K OHM 55 0 25W RES FXD CMPSN 2 4K OHM 5 0 25W RES FXD CMPSN 1K OHM 5 25W RES FXD CMPSN 2 4K OHM 55 0 25W RES FXD CMPSN 1K OHM 55 0 25W Mfr Code 01121 01121 01121 01121 01121 01121 01121 01121 03323 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 Mfr Part Number CB1025 CB7505 CB8215 CB1815 CB8215 CB7505 CB8215 CB2715 CB7505 CB5115 CB1025 CB1525 CB2715 CB2715 CB2735 CB2735 CB5105 CB1525 CB1025 CB1025 CB2405 CB2015 CB3015 CB5125 CB5125 CB5125 CB1815 CB2715 CB8215 CB8215 CB5115 CB1025 CB3015 CB5125 CB1015 CB1025 CB1035 CB1015 CB1525 CB5125 CB1525 CB5125 CB1525 CB5125 CB1525 CB5
92. ROCIRCUIT DI DUAL 4 INPUT OR NOR GATE 80009 156 0282 00 U350 156 0228 00 MICROCIRCUIT DI MASTER SLAVE TYPE D F F 80009 156 0228 00 U355 156 0230 00 MICROCIRCUIT DI DUAL D MA SLAVE FLIP FLOP 80009 156 0230 00 U360 156 0230 00 MICROCIRCUIT DI DUAL D MA SLAVE FLIP FLOP 80009 156 0230 00 U390 156 0228 00 MICROCIRCUIT DI MASTER SLAVE TYPE D F F 80009 156 0228 00 U400 156 0228 00 MICROCIRCUIT DI MASTER SLAVE TYPE D F F 80009 156 0228 00 2 lpurnished as a unit with R150 2Purnished as a unit with R260 Jrurnished as a unit with R475 L REV A AUG 1977 3 19 Replaceable Electrical Parts DC505A Tektronix Serial Model No Mfr Ckt No Part No Eff Name amp Description Code U410 156 0230 00 MICROCIRCUIT DI DUAL D MA SLAVE FLIP FLOP 80009 156 0230 00 U435 156 0042 00 MICROCIRCUIT DI J K M S FLIP FLOP 01295 SN7476N 440 156 0395 00 MICROCIRCUIT DI DECADE COUNTER 01295 SN7490AN U445 156 0395 00 MICROCIRCUIT DI DECADE COUNTER 01295 SN7490AN U450 156 0395 00 MICROCIRCUIT DI DECADE COUNTER 01295 SN7490AN U455 156 0395 00 MICROCIRCUIT DI DECADE COUNTER 01295 SN7490AN U495 156 0205 00 MICROCIRCUIT DI QUAD 2 INPUT NOR GATE 80009 156 0205 00 U497 156 0205 00 MICROCIRCUIT DI QUAD 2 INPUT NOR GATE 80009 156 0205 00 U500 156 0182 00 MICROCIRCUIT DI TRIPLE 2 3 2 INPUT GATE 04713 MC10105L U580 156 0174 00 MICROCIRCUIT DI DUAL J K MS FLIP FLOP 01295 SN74111N U585 156 0150 00 MICROCIRCUIT DI QUAD 2 INPUT POS NAND BFR 01295 SN7437N U587 156 0030 00 MICROCIRCUIT
93. SEMICOND DEVICE ZENER 0 4W 5 1V 5 81483 69 6584 lstandard only 2option 3 only Joption 4 only 3 20 Mfr Part Number e Replaceable Electrical Parts DC505A o Tektronix Serial Model No Mfr Ckt Part No Eff Dscont Name amp Description Code Mfr Part Number Eti SEMIS UR CELL TEE T eh God dl U lU Z Rt hes LEE VR275 152 0217 00 SEMICOND DEVICE ZENER 0 4W 8 2V 5 80009 152 0217 00 VR280 152 0226 00 SEMICOND DEVICE ZENER 0 4W 5 1V 5 81483 69 6584 98290 152 0226 00 SEMICOND DEVICE ZENER 0 4W 5 1V 5 81483 69 6584 v900l 158 0079 00 XTAL UNIT QTZ 1 MHZ 0 001 80009 158 0079 00 9012 119 0503 00 OSCILLATOR RF 15MHZ 71034 214 1 4 r lstandard only option 1 only 3 21 Section 4 DC 505A OPTION INFORMATION Your instrument may be equipped with one or more options This section describes those options or directs the reader to where the option is documented OPTION 1 Replaces internal 1 MHz oscillator clock circuitry with a self contained temperature compensated 5 MHz crystal oscillator system for increased accuracy and stability 1 Schematic diagram will be found on diagram 2 Adjustment procedure will be found on Adjustments fold out 3 Electrical components will be found in Electrical Parts List and on the Parts Location Grids for the Main Board OPTION 4 Provides de
94. SEMICOND DEVICE SILICON 200V 3A SEMICOND DEVICE SILICON 200V 3A SEMICOND DEVICE SILICON 30V 150MA SEMICOND DEVICE SILICON 30V 150MA SEMICOND DEVICE SILICON 30V 150MA SEMICOND DEVICE SILICON 30V 150MA SEMICOND DEVICE SILICON 15V 50MA SEMICOND DEVICE SILICON 30V 150MA SEMICOND DEVICE SILICON 30V 150MA SEMICOND DEVICE SILICON 30V 150MA SEMICOND DEVICE SILICON 30V 150MA SEMICOND DEVICE SILICON 15V 50MA SEMICOND DEVICE SILICON 30V 150MA SEMICOND DEVICE SILICON 30V 150MA SEMICOND DEVICE SILICON 30V 150MA SEMICOND DEVICE SILICON 30V 150MA SEMICOND DEVICE SILICON 30V 150MA Mfr Code 72982 72982 72982 72982 72982 72982 72982 72982 91418 72982 72982 72982 72982 72982 72982 72982 56289 72982 72982 56289 56289 72982 72982 72982 72982 91418 72982 04222 72982 72982 72982 72982 72982 74970 72982 04713 04713 07910 07910 07910 07910 80009 07910 07910 07910 07910 80009 07910 07910 07910 07910 07910 Mfr Part Number 831 516E102P 831 516E102P 8131N075 E224M 831 516E102P 855 558250 1032 81319075 E224M 855 558250 1032 8121 N088Z5U104M MX104Z1201R0 3010002529105 831 516 102 831 516E102P 861 518B271J 301 0000270680 8121 N088Z5U104M 855 558250 1032 19 606 855 558250 1032 8131N127X7R0473K 1960336 0010 1 1960336 0010 1 8121 N088Z5U104M 8121 N088Z5U104M 8131N147W5R273K 301 000U2M0101M 10421201 0 855 558250 1032 7001 1381 831 516 102 855 558
95. SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR942 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 14152 CR943 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR944 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR946 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR947 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 184152 CR948 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR950 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR951 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR952 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR954 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR955 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 14152 CR957 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR958 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR960 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR961 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 14152 CR963 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR964 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR966 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR967 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 154152 CR969 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1 4152 CR970 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N4152 CR972 152 0141 02 SEMICOND DEVICE SILICON 30V 150MA 07910 1N41
96. SOCKET PLUG IN 16 CONTACT LOW CLEARANCE 01295 933602 136 0260 027 B010950 10 SOCKET PLUG IN 16 CONTACT LOW CLEARANCE 01295 931602 136 0260 022 010100 010969 13 SOCKET PLUG IN 16 CONTACT LOW CLEARANCE 01295 931602 136 0260 02 B010970 10 SOCKET PLUG IN 16 CONTACT LOW CLEARANCE 01295 931602 136 0260 023 010100 B010773 13 SOCKET PLUC IN 16 CONTACT LOW CLEARANCE 01295 933602 136 0252 043 B010774 10 SOCKET PIN TERM 0 188 INCH LONG 22526 75060 53 136 0269 02 10 SOCKET PLUG IN 14 CONTACT LOW CLEARANCE 01295 931402 54 214 0579 00 4 TERM TEST PT 0 40 INCH LONG 80009 214 0579 00 55 2 SWITCH PUSH SEE S185 AND 5295 EPL 56 2 SWITCH PUSH SEE S105A B 5215 EPL 57 361 0384 00 12 SPACER PB SW 0 133 INCH LONG 80009 363 0384 00 58 175 1405 00 3 CA ASSY SP ELEC FLAT 2 INCHES LONG 15912 FST 22A 10 59 366 1257 30 1 PUSH BUTTON GRAY RESET 80009 366 3257 30 60 366 1402 64 1 PUSH BUTTON GRAY IN START OUT 80009 366 1402 64 561 2 22 1 1 BOARD ASSY REGULATOR SEE AS EPL 62 131 1343 001xB010950 1 CONTACT ASSY EL 36 PIN SET 22526 65274 2 131 1343 002 010970 1 CONTACT ASSY EL 36 PIN SET 22526 65274 2 131 1343 003 010774 1 CONTACT ASSY EL 36 PIN SET 22526 65274 2 63 136 0252 041x8010950 1 SOCKET PIN TERM 0 188 INCH LONG 22526 75060 136 0252 04 2xB010970 1 SOCKET PIN TERM 0 188 INCH LONG 22526 75060 136 0252 043 010774 1 SOCKET PIN TERM 0 188 INCH
97. TE switch positions are changed 1 2 2 504 with more than two DC 5054A s installed Change F35 5 A fuse to a 7 5 A fuse Tektronix Part o Number 159 0096 00 3 TM 515 with more than three DC 505 5 installed Change F135 7 5 A fuse to a 10 A fuse Tektronix Part Number 159 0057 00 4 TM 506 with more than three DC 5054A s installed Change F35 7 5 A fuse to a 10 A fuse Tektronix Part Number 159 0057 00 TABLE 1 1 Unit Indicators Decimal Point e GATE TIME With the DISPLAY TIME control in the full ccw position observe that the GATE indicator flashes rapidly for short GATE TIMEs and more slowly for longer GATE TIMEs Using a short GATE TIME rotate the DISPLAY TIME control slowly cw Observe that the GATE light will stay off for a longer and longer time until the control clicks into the HOLD detent position holding off the GATE indefinit ly Return the DISPLAY TIME control to the ccw position RATIO A B and EVENTS A DURING B Displays Set the FUNCTION switch to RATIO A B and the N switch to 10 Check the readout displays according to Table 1 2 Set the FUNCTION switch to EVENTS A DURING B and the N switch to 10 Again check the readout displays using Table 1 2 Changing the CLOCK RATE switch should have no effect on the decimal point appearing in the readout display in either of these FUNCTION switch e settings REV A APR 1977 Hot L J f Hose H o
98. TEKTROND INSTRUCTION MANUAL Tektronix Inc P O Box 500 Beaverton Oregon 97077 Serial Number 070 1984 00 First Printing APR 1975 SECTION 1 DC 505A TABLE OF CONTENTS OPERATING INSTRUCTIONS INTRODUCTION Installation OPERATIONAL CHECK Controls and Connectors Display Tests INPUT CONSIDERATIONS Input Sources Input Coupling Attenuators and Maximum Input Volts Sensitivity and Frequency Range Slope and Level FREQUENCY MEASUREMENTS Frequency A Triggering Measurement Intervals Measurement Rate RATIO MEASUREMENTS Triggering Resolution PERIOD MEASUREMENTS Gating Averaging Low Frequencies TIME INTERVAL MEASUREMENTS General Width B Mode Time A B Mode Time Interval Averaging Single Shot using HOLD EVENT MEASUREMENTS Averaging TOTALIZING Purpose Operation FUNCTIONS AVAILABLE AT REAR CONNECTOR Customizing the Interface Control Lines Signal Lines Page 1 1 1 7 1 7 1 8 1 8 1 8 1 8 1 9 1 9 1 10 1 10 1 10 1 10 DC 505A TABLE OF CONTENTS cont SECTION 1 OPERATING INSTRUCTIONS cont ELECTRICAL CHARACTERISTICS Performance Conditions Table 1 6 Channels A amp B Input Table 1 7 Display Resolution and Accuracy Table 1 8 Internal Time Base Table 1 9 Display Table 1 10 Outputs Table 1 11 Environmental SECTION 2 THEORY OF OPERATION INPUT AND TRIGGER AC DC Selection Attenuators and Coupling CH A amp B Input Amplifier Signal Shaping Slope Selection
99. TS 7 Adjust Check CH A and CH B LEVEL OUT This step requires that the 5403 D40 5A38 5B40 units be used as a Dual Channel Oscilloscope real time operating in a vertical ALTERNATE mode a Using the Dual Input Cable BNC T Adapter and 50 Q Coaxial Cables connect the output of the Function Generator to CH A and CH B of the DC 505A and then to CH 1 of the vertical amplifier unit Use CH 1 Position control to set ground reference GND 0 V at center graticule with CH 1 at 0 5 V div After ground reference for CH 1 has been set dc couple both vertical channels and set CH 2 for 0 2 V div Do not readjust CH 1 Position control unless trace drifts from ground reference level 0 V b Set Function Generator controls for about 150 Hz Ramp output amplitude from 2 5 V to 2 5 V Set vertical mode of oscilloscope to ALT Set 5B40 sweep rate for 0 2 ms div then use oscilloscope and Function Generator controls to establish a positive going 45 Ramp displayed on CH 1 Ramp must pass through the zero volt reference level of the center 8 X 8 graticule divisions Do not use CH 1 Position control to adjust the Ramp display because the ground reference level will be lost c Connect B OUT from DC 505A to CH 2 via Sealectro Adapter to BNC connector cable Set CH A and CH B of DC 505A for SLOPE X1 ATTEN and DC COUPL Set FUNCTION switch to TIME A B Set LEVEL OUT switch to CH A Adjust DC 505A LEVEL knobs so that CH A LEVEL knob
100. The units indicators and decimal points should remain off CHANNEL A SLOPE With the FUNCTION control set to TOTALIZE A CH A to SLOPE depress IN START OUT STOP button Turn the CH A LEVEL control knob fully cw Readout display should increase one count each time the knob is turned from cw to ccw past centered LEVEL position Verify that the count does not increase when the knob is turned from ccw to cw Change to SLOPE Push the RESET button to clear the display Readout should now increase one count each time the CH A LEVEL control is turned from ccw to cw Turning the LEVEL control from cw to ccw should not increment the display CHANNEL B SLOPE Set FUNCTION control switch to PERIOD B CH B to SLOPE averaging factor control to 1 Push the RESET button Check that the GATE light turns on when the CH B LEVEL control knob is turned from the cw to the ccw position Turning the knob back to cw should have no effect on the GATE light Another turn from cw to ccw turns the light off Change to SLOPE Push the RESET button Check that the GATE light turns on when CH B LEVEL control knob is turned from cew to cw The light should remain when the knob is turned back to ccw The GATE light turns off on the next turn from ccw to cw of the LEVEL control knob Channels A amp B The channel A amp B input circuits with the exception of the attenuators can be checked in a no signal input condition by generating pseudo
101. Therefore the faulty transistor is at the intersection of the 3rd column and 4th row Orient the DC 505A sothatthe nomenclature etched on the circuit board can be read correctly The transistors are laid out on the circuit board the same way as the the schematic and Table 1 3 is drawn Frequency Mode With the FUNCTION switch set to any of the FREQUENCY A positions the decimal point placement and parameter lights are controlled by U925A B C and D RATIO A B EVENTS A DURING B MODES Five transistors Q975 Q978 Q981 Q984 and Q987 control decimal point and parameter selection from the N averag ing Switch for RATIO A B and EVENTS A DURING B settings of the FUNCTION switch There is no parameter or decimal point placement in TOTALIZE A mode Theory of Operation DC 505A DISPLAY AND POWER SUPPLIES Seven Segment Decoder And Driver Display And Parameter LED s U780 is a BCD to seven segment decoder It accepts the BCD output of the latches then allows pull down current to the appropriate cathodes of the enabled LED s to display the correct number The display LED s are DS820 DS815 DS810 DS806 DS800 DS796 and DS790 When looking at the front panel 35820 controls the numerical digit displayed at the far left Each LED unit has seven segments arranged so that a combination of lighted segments forms a number When all of the segments are lighted an 8 is formed Leading Zero Suppression Decoder driver U780 als
102. UMERICAL DISPLAY 50579 DL8L ps8152 150 1002 00 B010100 B010929X LAMP LED RDOUT NUMERICAL DISPLAY 50579 DL8L 8201 150 1002 00 010100 8 010879 LAMP LED RDOUT NUMERICAL DISPLAY 50579 DL8L 8201 150 1024 00 010880 LAMP LED DSPL 2 DIGIT 7 SEGMENT RED 50579 DL882A 58202 150 1002 00 010100 010929 LAMP LED RDOUT NUMERICAL DISPLAY 50579 DL8L 058202 150 1024 00 010930 LAMP LED DSPL 2 DIGIT 7 SEGMENT RED 50579 DL882A ps8251 150 1004 00 B010100 B010879 LAMP LED RED 2 5V 15MA 08806 551 12 ps8251 150 1040 00 B010880 LAMP LED RED 5MA 2 0V 50347 LLL 7A 58252 150 1004 00 010100 8 010929 LAMP LED RED 2 5V 15MA 08806 SSL 12 DS8252 150 1040 00 010930 LAMP LED RED 5MA 2 0V 50347 LLL 7A Standard only Option 1 only REV B AUG 1977 3 7 Replaceable Electrical Parts DC505A Ckt No ps8261 ps8261 ps8262 DS8262 58271 8271 DS827 058272 25828 05828 058282 05828 F25 J100 J205 J210 J310 L25 L50 155 L185 L295 1332 L870 g10 0102 0102 0301 9302 9303 942 965 068 980 Q125A B Q130 0132 0160 0165 Q170 0172 0195 0235 0240 9242 0270 0275 9280 9282 9330 Q385 Tektronix Part No 150 1004 00 150 1040 00 150 1004 00 150 1040 00 150 1004 00 150 1040 00 150 1004 00 150 1040 00 150 1004 00 150 1040 00 150 1004 00 150 1040 00 159 0017 00 131 0955 00 131 0938 00 131 0955 00 131 0938 00 108 0551 00 108 0337 00 108 0422 00 108 0181 01 108 0
103. W 01121 1025 R924 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 R925 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 926 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 81025 R927 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 R930 315 0512 00 RES FXD CMPSN 5 1K OHM 5 0 25W 01121 5125 R935 315 0512 00 RES FXD CMPSN 5 1K 5 0 25 01121 5125 R975 315 0203 00 RES FXD CMPSN 20K OHM 5 0 25W 01121 82035 R976 315 0103 00 RES FXD CMPSN 10K OHM 5 0 25W 01121 1035 R977 315 0203 00 RES FXD CMPSN 20K OHM 5 0 25W 01121 82035 R978 315 0203 00 RES FXD CMPSN 20K OHM 5 0 25W 01121 CB2035 R979 315 0103 00 RES FXD CMPSN 10K OHM 5 0 25W 01121 1035 R980 315 0203 00 RES FXD CMPSN 20K OHM 5 0 25W 01121 82035 R981 315 0203 00 RES FXD CMPSN 20K OHM 5 0 25W 01121 52035 R982 315 0103 00 RES FXD CMPSN 10K OHM 5 0 25W 01121 1035 R983 315 0203 00 RES FXD CMPSN 20K OHM 5 0 25W 01121 2035 R984 315 0203 00 RES FXD CMPSN 20K OHM 5 0 25W 01121 82035 R985 315 0103 00 RES FXD CMPSN 10K OHM 55 0 25W 01121 1035 R986 315 0203 00 RES FXD CMPSN 20K OHM 5 0 25W 01121 52035 R987 315 0203 00 RES FXD CMPSN 20K OHM 5 0 25W 01121 2035 R988 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 989 315 0103 00 RES FXD CMPSN 10K OHM 5 0 25W 01121 1035 R990 315 0203 00 RES FXD CMPSN 20K OHM 5 0 25W 01121 82035 590 260 1470 00 SWITCH SL
104. WASHINGTON STREET P O BOX 372 4242 W BRYN MAWR P O BOX 609 225 HOYT City State Zip I PICKENS SC 29671 MILWAUKEE WI 53204 DALLAS TX 75222 MURTLE BEACH SC 29577 PHOENIX AZ 85036 BERKELEY HEIGHTS NJ 07922 CLEVELAND OH 44101 MOUNTAIN VIEW CA 94042 HAWTHORNE CA 90250 CLEVELAND OH 44112 CHICAGO IL 60647 SANTA CLARA CA 95051 HAPPAUGE NY 11787 CARROLLTON TX 75006 EDISON NJ 08817 CUPERTINO CA 95014 NORTH ADAMS MA 01247 ERIE PA 16512 ST LOUIS MO 63107 ERIE PA 16512 FULLERTON CA 92634 WASECA MN 56093 PHILADELPHIA PA 19108 WARMINISTER PA 18974 BEAVERTON OR 97077 LOS ANGELES CA 90069 INDIANAPOLIS IN 46206 CHICAGO IL 60646 COLUMBUS NE 68601 MAMARONECK NY 10544 REV A APRIL 1977 Replaceabie Electrical Parts DC505A Tektronix Serial Model Mfr No Eff Dscont Name amp Description Code Mfr Part Number j 11 670 4225 00 010100 010299 BOARD ASSY MAIN 80009 670 4225 00 11 670 4225 01 010300 010629 BOARD ASSY MAIN 80009 670 4225 01 all 670 4225 02 8 010630 5010949 BOARD ASSY MAIN 80009 670 4225 02 11 670 4225 03 010950 BOARD ASSY MAIN 80009 670 4225 03 12 670 4225 00 10100 10298 BOARD ASSY MAIN 80009 670 4225 00 A12 670 4225 01 10299 659 BOARD ASSY MAIN 80009 670 4225 01 A12 670 4225 02 010660 10773 BOARD ASSY MAIN 80009 670 4225 02 A12 670 42
105. XD CMPSN 2K OHM 5 0 25W 01121 82025 R550 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 R554 315 0103 00 RES FXD CMPSN 10K OHM 5 0 25W 01121 1035 R560 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 81025 R565 315 0361 00 RES FXD CMPSN 360 OHM 5 0 25W 01121 3615 R570 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 R574 315 0103 00 RES FXD CMPSN 10K OHM 5 0 25W 01121 CB1035 R580 315 0102 00 RES FXD CMPSN 1K 5 0 25 01121 CB1025 R5821 315 0511 00 010100 011059 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 R5821 315 0102 00 011060 RES FXD CMPSN 1K OHM 5 0 25W 01121 25 R5822 315 0511 00 010100 011079 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 R5822 315 0102 00 B011080 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 85823 315 0511 00 010100 B011144 RES FXD CMPSN 510 OHM 5 0 25W 01121 5115 85823 315 0102 00 011145 RES FXD CMPSN 1K 5 0 25 01121 1025 R590 315 0512 00 RES FXD CMPSN 5 1K 5 0 25 01121 5125 R592 315 0512 00 RES FXD CMPSN 5 1K 5 0 25 01121 5125 R595 315 0102 00 RES FXD CMPSN 1K 5 0 25 01121 53025 R596 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 R598 315 0473 00 RES FXD CMPSN 47K OHM 5 0 25W 01121 4735 R605 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 R606 315 0102 00 RES FXD CMPSN 1K OHM 5 0 25W 01121 1025 86151 315 0183 00 010100 010629 RES FXD CM
106. ak should not be attenuated For higher amplitude signals select an attenuation factor such that the attenuated signal falls into the range of 150 mV to 4 V peak to peak The LEVEL control must be varied for a stable reading It will not be touchy unless the signal amplitude and frequency are close to or perhaps beyond the specified limits A signal that looks stable on an oscilloscope may stil show jitter when measured with 7 digit resolution 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 505A is not being triggered properly either because the controls not set right or the signal is beyond the counter s capabilities For frequency measurements all CH B trigger settings no effect or CLOCK RATE settings are irrelevant Measurement Intervals To adjust the trigger controls choose a short GATE TIME such as 1 s or 01 s 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 If the frequency is below 100 Hz numbers may not appear during the shortest gate times Forsuch low frequencies a PERIOD measurement is better suited Final selection of GATE TIME depends on the frequen cy being measured desired resolution and willingness of the operator to wait for a measurement Using short gate times higher frequencies may
107. al period measurement 3 Leaving CH A and CH B trigger controls as they were go the RATIO A B mode The correct ratio should be displayed Resolution The N switch may now be operated to select maximum resolution For most measurements the smallest value of N that produces a useful number of digits will be best PERIOD MEASUREMENTS Gating Period measurement is provided universal counter timers primarly 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 1 kHz signal requries 1 000 seconds of GATE TIME to accumulate a million counts However in only one second a 1 kHz signal can gate a count of one million clock pulses from a 1 MHz clock Simply stated the PERIOD B mode reverses the functions of signal and clock as compared to the FRE QUENCY A mode In FREQUENCY A the gate is held open for some number of clock pulses while signal events are counted then displayed In PERIODB the gate 5 held open for some number of signal events N while clock pulses are counted then displayed Averaging Resolution and accuracy is improved by averaging the signal value over a large number of signal events This increases the total time to take a measurement i e similar to selecting a longer GATE TIME in the FREQUENCY A mode The best resolution possible for period measurements is 0 1 ps Low Frequencies Pe
108. an output signal line during overflow The IN START OUT STOP signal is also addressable via the interface lines Signal Lines These lines provide for signal input to each channel status clock signal outputs and BCD data outputs The Reset Time Slot Zero TSO Data Good and Overflow lines report the status of the DC 505A BCD data lines report the count in an 8 4 2 1 serial by digit method As long as the Internal Scan Clock Disable line remains high or open the Internal Scan Clock output signal is available The internal 1 MHz Clock signal is brought to the interface for possible synchronous applications An internal switch allows this same lineto be used for external 1 MHz Clock input 4 Operating Instructions DC 505A ELECTRICAL CHARACTERISTICS Performance Conditions The electrical characteristics are valid only if the DC 505A 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 TABLE 1 6 Channels A and B Input Characteristics Performance Requirements Supplemental Information Frequency Range DC Coupled 0 Hz to 225 MHz 0 1 Sensitivity 50 mV rms sine wave times Sine wave used for measurement attenuation to 150 MHz AC Coupled 10 Hz to 225 MHz 100 mV rms sine wave times 0 attenuation from 150 MHz to 225 MHz Impedance 1 MQ
109. cimal point data output through the rear interface connectors This option is intended for use with the 153 Calculator Instrumentation Interface system 1 Schematic wiring information will be found on diagram 2 The decimal point logic levels go LOW to turn on the decimal point to the left of the digits associated with time slots TS 3 through TS 7 3 The following data relates the DC 505A rear interface connector pins with decimal point information for the 153 Calculator Instrumentation Interface system NOTE 4 Decimal point numbers refer to Calculator decimal points DP 1 Pin 15A DP2 Pin 14B Pin 15B DP 4 Pin 18B DP 5 Pin 27B 4 1 NOI 1YvWHO JNI a gt SEEBAELE ZZ 7 BE Ps DR i 2 IT Section 5 DC 505A DIAGRAMS AND CIRCUIT BOARD ILLUSTRATIONS Symbols and Reference Designators Electrical components shown on the diagrams are in the following units unless noted otherwise Capacitors Values one or greater are in picofarads pF Values less than one are in microfarads uF Resistors Ohms Q Symbols used on the diagrarns 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
110. com mon return mon return 11 5 V com mon return 11 5 V filtered DC 25 VAC winding 11 5 V com mon return 2 11 5 filtered DC visis 1 ina winding Assignments listed for pins 1A 13A and 1 13 are available in all power modules however only those pins marked with an asterisk are used by the DC 505A CONTROLS INT EXT Clock Selection Switch When facing front of DC 505A the slide switch mounted on the Main right Circuit Board should be In the forward position towards front of instrument to select internal clock Slide switch back towards rear of instrument when external clock input is desired a Y 5 1 usss IE CU 5 955999898 D gt i SENKT icto uq CLOCK 2 1977 CONTROLS AND CONNECTORS Units Indicators LED indicates that displayed number is MHz 10 or kHz 10 if in FREQ A modes or ns 10 10 or ms 10 if in a time mode In the RATIO A B EVENTS A DURING B and TOTALIZE A modes no units are indicated Display Readout LED readout seven 7 segment digits with auto matically placed decimal point The leading zeroes are suppressed unless an over flow is indicated Gate Indicator A OUT Con
111. cription by a colon Because of space limitations an 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 x INCH ELCTRN ELECTRON NUMBER SIZE ELEC ELECTRICAL ACTR ACTUATOR ELCTLT ELECTROLYTIC ADPTR ADAPTER ELEM ELEMENT ALIGN ALIGNMENT EPL ELECTRICAL PARTS LIST AL ALUMINUM EQPT EQUIPMENT ASSEM ASSEMBLED EXT EXTERNAL ASSY ASSEMBLY Fit FILLISTER HEAD ATTEN ATTENUATOR FLEX FLEXIBLE AWG AMERICAN WIRE GAGE FLH FLAT HEAD BD BOARD FLTR FILTER BRKT BRACKET FR FRAME or FRONT BRS BRASS FSTNR FASTENER BRZ BRONZE FT FOOT BSHG BUSHING FIXED CAB CABINET GSKT GASKET CAP CAPACITOR HDL HANDLE CER CERAMIC HEX HEXAGON CHAS CHASSIS HEX HD HEXAGONAL HEAD CKT CIRCUIT HEX SOC HEXAGONAL SOCKET COMP COMPOSITION HLCPS HELICAL COMPRESSION CONN CONNECTOR HLEXT HELICAL EXTENSION cov COVER HV HIGH VOLTAGE CPLG COUPLING INTEGRATED CIRCUIT CRT CATHODE RAY TUBE ID INSIDE DIAMETER DEG DEGREE IDENT IDENTIFICATION DwR DRAWER IMPLR IMPELLER IN INCH SE SINGLE END INCAND INCANDESCENT SECT SECTION INSUL INSULATOR SEMICOND SEMICONDUCTOR INTL INTERNAL SHLD SHIELD LPHLDR LAMPHOLDER SHLDR SHOULDERED MACH MACHINE SKT SOCKET MECH MECHANICAL St SLIDE MTG MOUNTING SLFLKG SELF LOCKING NIP NIPPLE SLVG SLEEVING NON WIRE NOT WIRE WOUND SPR SPRING OBD OROER BY DESCRIPTION 5 SQUARE OD OUTSIDE DIAMETER SST STAINLESS ST
112. de of foldout MOS Interface 10 10 DCU and Latches and Overflow Time Slot Generator Leading Zero Suppression and Display Time Base Phase Lock Loop and Decimal Point amp Parameter Matrix OOO SECTION 6 MECHANICAL PARTS LIST Fig 1 Exploded CHANGE INFORMATION C Cj LJ li i 4 DC 505A UNIVERSAL COUNTER TIMER que GATE e o FUNCTION GATE TIME FREQUENCY A S 1 L lt 2 4 8 8 EVENTS Di TOTALIZE A DISPLAY TIME D FUNCTION no AVG D OVER IN CYCLES OF 8 OR 8 L L SA CLOCK 75 i 10 Ims 10 s 2 10 105 7 10 lus i 10 lus c pt 1 10 k COMPE BUT DC 505A Section 1 DC 505A OPERATING INSTRUCTIONS INTRODUCTION The DC 505A Universal Counter Timer has seven measurement functions frequency counting finding fre quency ratios period timing interval timing width timing electronic event counting and manual event counting The DC 505A has two input channels A amp B each having bnc inputs and separate triggering level attenuators and coupling mode controls Both input channels have the same 225 MHz capability Seven segment light emitting diode arrays LED s provide a seven digit visual numerical display The decimal poi
113. e L azsa cias eis 2 18 5 SEE PARTS LIST FOR EARLIE INDICATES CONTACT CLOSED 1984 10 REV AUG 1977 VALUES AND SERIAL NUMBE RANGES OF PARTS OUTLINE OR DEPICTED IN GREY FAR TO Onu MAIN CIRCUIT BOARD DC 505A INSTALL FOR OPTION 1 ONLY PARTS LOCATIOI REMOVE FOR OPTION 1 9960 961 35 gt ey 8250 OGE RSET ID WL 955 BES 949 Q943 i i a R918 ESTERS 2 RU mc sae ok Use only in Option 4 REV A MAR 1977 CKT NO CKT GRID CKT GRID NO LOC NO LOC C17 J4 CR957 B6 C20 K5 CR958 B6 C35 K5 CR960 86 C40 M4 CR961 86 C60 L4 CR963 6 c65 L4 CR964 C6 C75 J5 CR966 CS C80 CR967 C5 81 14 CR969 5 C543 85 CR970 C5 C545 B5 CR972 C5 C565 B5 CR973 C5 C620 J3 CR975 05 C630 J4 CR976 D5 C632 K1 CR978 D5 C664 L1 C668 11 125 L6 C680 G2 C681 H2 042 L5 C684 G3 065 L5 C685 G2 668 L5 C697 080 L4 C710 12 0540 A4 C722 L2 0550 B5 C730 13 0565 85 C732 0570 5 C744 12 Q575 L6 C746 2 0615 4 755 01 19640 L2 C757 D1 0655 L2 C891 K3 Q660 L2 C904 J4 0670 L2 C906 J5 0680 G3 67 5 0690 F2 CR68 K5 0700 G1 CR332 B2 0701 G1 CR545 85 0702 G1 CR554 84 0703 F1 CR555 84 0704 F1 CR57
114. e controlled oscillator is a 100 MHz signal which is first divided by 10 through U835 and U845 The second divide by 10 in U855 produces a 1 MHz signal at its output 8 which is fed to pin 3 of the Phase Detector U856 The internal clock supplies a 1 MHz reference signal to pin 1 of UB56A Loop lock up occurs when the negative transitions of both the reference input at pin 1 and the feedback input at pin 3 coincide If the input signal at pin 3 lags or leads the reference signal at pin 1 the phase detector U856 generates an error voltage through the filter amplifier FET follower Q865A and amplifier pin 9 to pin 8 of U856C that is proportional to the phase difference of the input signals This voltage is applied to the cathode of the varactor diode CR870 in the tank circuit providing a voltage variable input The variable capacitance of the varactor produces a frequency change correcting the 100 MHz voltage controlled oscillator VCO output COUNTERS DISPLAY MULTIPLEXING TIME BASE AND PARAMETER SELECTION 10 10 Decade Counting Units DCU And Display Latches The 10 to 10 DCU are cascaded divide by 10 counters The count is transferred to a storage register which displays the results leaving the counting circuits free to make new measurements The display accumulates data coming into Channel A when measuring FREQUENCY A RATIO A B EVENTS A DURING B or TOTALIZE A It accumulates CLOCK RATE pulses when mea
115. ecoder U755 provides 8 output lines or time slots U700 the MOS four decade counter with latches and multiplexing circuitry generates the four most significant digit information displayed by the first four time slots 1 through 4 The Scan Input pin 9 drives the internal counter routing one decade count ata time to the outputs The decoders are scanned from MSD most significant digit to LSD least significant digit second set of four time slots display the remaining three digits 5 6 and 7 and a time slot 0 used for referencing which is not displayed The three digits 5 6 and7 are derived from the discrete latches U652 U676 and U679 respectively The first four pulses coupled through U715B and U650A into pin 9 of U700 advance the BCD outputs from MSD to LSD A grounded emitter transistor Q704 is turned on when the first four time slots are activated enabling the transistors that are driven from the outputs of U700 Output pin 10 drives Q703 and pins 11 12 and 13 drive Q702 Q701 and Q700 in that order The divide by 8 counter U750A U750B U720B causes a high for four counts which transmits the first four pulses 1 through 4 into pin 9 of U700 The next 4 counts 5 6 7 and 0 present a low at pin 9 and no pulses are received Thus during time slots 5 6 7 and 0 the latched BCD information from U652 U676 and U679 can be displayed since Q704 is turned off r
116. ed The last digit LSD to the right is always displayed as follows TS 7 is applied through negative output NOR gate U625C It is then applied to the direct set input of U765A as a low This holds 5 of U780 high preventing zero blanking during the TS 7 time slot 2 6 The location of the decimal point in the display is determined by the FUNCTION CLOCK RATE and N averaging Switches The proper information is applied via the decimal logic to NAND gates U760A B C and D Time slot lines TS 3 through TS 6 enable these NAND gates in sequence setting U765A to the non blank state at the appropriate time In the case where the counter overflows the high output from U610B or Q725 is applied to pin 11 of U630E setting pin 4 of U765A to the non blank state When the front panel RESET button is pushed RESET goes low overriding the output of U765A applying the non blank and lamp test functions to the decoder This causes all seven segments in the display LED s to be turned on The reset circuitry provides an automatic reset by grounding the RESET line fora short time after instrument turn on The FUNCTION switch also provides a method of automatic reset by grounding the RESET line between switch detent positions The automatic reset ensures that the readout has been cleared before the next measure ment The automatic reset can be seen by noting that the display goes to all eights all LED segments lit in between switch detent posit
117. equired for compatibility with the MOS IC U700 To ensure that the MOS divider U700 accumulates and displays information properly inputs to pins 5 6 and 7 must arrive with a special timing and sequence A negative edge at the Count Input pin 7 must follow a Transfer Input signal 5 by at least 1 us Reset Input 6 must follow this Count Input atleast 1 us This prevents transfer of invalid data Negative edge transition at the Count Input pin 7 increment the counter For correct operation of 250 kHz maximum frequency into J700 the waveform at pin 7 must be low for 1 us and high for 3 us for a total of 4 us Transistor Q680 and its associated circuitry modify the signal from pin 11 of U678 to provide the maximum count rate When the Transfer Input pin 5 is low data in the decade counters is transferred to the internal storage latches The signal into pin 5 must be at least 2 5 us in duration Two stretchers provide 10 us and 100 us extend ed latch pulses The 10 us latch pulse is supplied to pin 5 of U700 by pin 11 U625D At least 1 us after a latch into pin 5 the Transfer Input and at least 1 us prior to a Reset signal into pin 6 an extra pulse into pin 7 Count Input is required Transistor Q690 which responds to the end of the latch edge into pin 5 Transfer Input provides the one additional delayed Count Input to pin 7 before the Reset pulse Thus when the Transfer Input pin 5 go
118. es high and the next negative transition at the Count Input pin 7 occurs the Transfer command is terminated 24 The 100 stretcher which holds off the Reset generated by the MOS Interfacing Circuitry proceeds from pin 4 of U630B The Reset signal couples across U620A to pin 6 of U700 The resetting at pin 6 of U700 guarantees that 1 the BCD information sent to the display from pins 10 through 13 of U700 will start at the Most Significant Digit MSD and 2 the display dividers in U700 are set to zeros Resetting of U700 occurs only when Time Slots 1 through 4 are not being displayed When the output information from U700 is being dis played pin 1 of U620A is held low which disables the signal from pin 3 of U620A into pin 6 of U700 Resetting via 3 of U620A is also disabled when the GATE is open via the LATCH and CLEAR signals to pin 12 of U620D and pin 3 of U610A respectively The signal at pin 2 of U620A shaped by RC network R632 and C632 resets the 10 10 and 10 DCU s The shaped signal transmitted to pin 2 of both U675 10 and U678 102 is also transferred to the Trigger Circuit Board to reset the 10 DCU Time Slot Generator Time Slot generation is derived from the scan clock U715C and U650F which operate as an oscillator The binary outputs from the divide by 8 counter three cascaded divide by two devices U750A U750B and U720B are transferred to serial information in U755 the Time Slot D
119. from pin 3 of U390 is transferred to pin 13to enable U495D Second this same signal from pin 3 of U390 transmits a low to the SET inputs of the first 10 averaging divider pin 5 of U400 U410A and U360A and pin 12 of U490B enabling it to count subsequent edges Third a pulse is coupled through Q420 from pin 2 of U490 to pin 14 of U455 The averaging dividers U455 U450 U445 and U440 used as decade counters are initially set to nines The pulse from Q420 causes the dividers to change states to zero s which starts the main GATE through the gating circuitry via pin 11 of U497C In averaging over 10 to 10 the next negative going edge into pin 14 of U455 causes U455 to change states at pins 1 and 12 This information is transferred to U495D Edges from pin 11 of U445 cause U450 to change states at pins 1 and 12 and from U450 through U445 and U440 in the same way producing the necessary averages to affect the GATE Averages from 10 to 10 are selected by the N Switch S950 on the front panel which determines the divider in use The propagation delay of all the dividers is transmitted through U495D both at the start and at the stop of the GATE except for an average of one The stop edge from pin 9 of U495D is coupled across U500C pin 13 to pin 14 and fed to the input pin 4 of U500A If an average of just 1 10 is required the stop edge comes from pin 3 of U400 coupled through U495B into pin 4 of U500A 2 2 For
120. ignal is high from the selected slope of the A input signal to the selected slope of the B input signal DISPLAY TIME Variable control concentric with FUNCTION switch sets the length of time the reading will be displayed after the count is made and before the next measurement is taken Display time can be varied from 0 1 5 ccw to about 10 seconds cw HOLD position detent provides continuous display until reset by pressing the RESET button FUNCTION Selects measurement time counting modes for counter Also selects the gate measurement interval inthe four FREQ A positions Manual Gate Push push switch operable when TOTALIZE A is selected by the FUNCTION switch Button in starts the measurement interval gate button out terminates the gate RESET Momentary pushbutton which manually resets acts as a master reset and provides a segment check of the 7 readout digits CLOCK RATE Selects the rate in the PERIOD TIME and WIDTH B modes of the FUNCTION switch at which pulses will be counted when the gate is opened by the input signal s FUNCTION AVG D Selects the number of measurements to be aver aged in the RATIO A B PERIOD TIME WIDTH 8 and EVENTS A DURING B modes of FUNCTION switch LEVEL OUT Output jack for monitoring triggering level of CHA or CH B 1984 5 The equiva tion mum n equipn If o contro alterec Detaile not giv to the inform
121. in Black 2 VERTICAL AMPLIFIER lt gt REV A MAR 1977 5 1 SEWER VS VII Yno DC 505A INPUT OUTPUT ASSIGNMENTS FOR PLUG IN REAR INTERFACE CONNECTOR Output or Pin Pin Output or Remarks Remarks Input B A Input 28 28 Internal 27 27 Sean Clock Disable Manual 26 26 Reset Start Stop Time Slot Internal 25 25 Scan Clock Zero 750 Out 24 24 Overflow Mea Signal 52 sure 23 ment TUPO Bar Trig Level rier 2 Out Slot BCD Output 21 Serial by Digit 8 20 4 860 Output Data Good 19 19 1 Serial by Digit 18 CH B Input 17 CH GND CH 8 GND 16 16 CH A Input 1 MHz Clock Out Ext Clock In 25 VAC 13 25 VAC winding winding 33 5 V 12 33 5 V filtered filtered DC Collector Base Lead of PNP 11 11 Lead of PNP Series Pass Series Pass Emitter Lead thiid le 10 10 of PNP Series Pass 33 5 V com 9 33 5 V com mon return mon return 33 5 V 28 e 33 5 V filtered dc filtered dc Bar Collector rier Emitter Lead of NPN Stot T Lead of NPN Series Pass Series Pass No Base Lead of connection NPN Series Pass 17 5 VAC 17 5 VAC winding winding 11 5 V com 11 5 V
122. ive the exclusive OR slope selection gate The shaped signal from both channels istransmitted to the TIME circuitry and the signal selection circuitry The signal from Channel A couples into U200D to provide shaped output at pin 15 of U200D which drives resistor R305 R308 to ground and resistor R307 to 10 V for output to the front panel A OUT J310 The signal from Channel B is coupled through additional gates in the Signal Selection circuitry to exclusive OR gate U190A to provide shaped output at pin 2 of U190A This drives resistor R202 R204 to ground and R205 to 10 V for output to the front panel B or OUT 205 Both OUTPUTS are centered around approximately 0 volts with 70 25 volt drive from 50 Signal Selection The output from pin 2 of U195A or pin 3 of U200B a hard wire or ECL combination is either the shaped signal from Channel A or the Time Select from the front panel The Time Select ranges from 10 nsto 1 ms determined by the CLOCK RATE switch This signal is transferred to the gate arming device U342 in the 10 DCU Decade Counting Units Circuit The output from pin 14 of U195C or pin 2 of U200A is either the shaped signal from Channel B or the A B signal from the output pin 13 and pin 2 of U315B and A of the TIME circuitry This signal is transmitted to the Gate and Control Logic Generator circuitry Time A B The TIME circuitry consists primarily of dual D type positi
123. k to peak amplitude then divide by 2 The answer is the desired 50 level Reset CH B LEVEL contro so that DVM indicates the 50 level then read the pulse duration from the DC 505A display TIME Mode This measurement requires input signals to both CHA and CH B but peak to peak signal amplitudes should first be determined using the WIDTH B mode refer to WIDTH Mode instructions For TIME measurements follow these steps 1 Set FUNCTION switch to WIDTH B 1 5 V TTL LEVEL 1 00 I DURATION WIDTH MODE A LEVEL 90 SET FALLTIME SLOPE 4 LEVEL SET LLLA 10 SLOPE 9 LEVEL SET Fig 1 3 Typical CH A and CH B LEVEL OUT voltage settings for various time interval measurements Operating Instructions DC 505A 2 Using a DVM the CH B LEVEL control and the GATE light indications determine the peak to peak amplitude of the signal to be applied to CH B Calculate desired triggering level for CH B 3 If signal to be applied to CH A is different in amplitude than CH B signal repeat step 2 to determine the peak to peak amplitude of the signal to be applied to CH A Calculate the desired triggering level for CH A 4 Set B to desired triggering level as calculated step 2 5 Set FUNCTION switch to TIME 8 6 Set CH A to desired triggering level as calculated in step 3 7 With signals connected to the pro
124. mation Temperature Operating 09 to 50 C Forced air circulation is re Storage 40 C to 75 G quired from 40 C to 50 C Altitude Operating To 15 000 feet Storage To 50 000 feet Vibration Operating and Non With the instrument complete and Operating 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 displacement Hold 3 minutes at any major resonance or if none at 50 Hz Total time 54 minutes Shock Operating and Non 30 g s 1 2 sine 11 ms duration Operating 2 shocks in each direction along 3 major axes for a total of 12 shocks 1 16 8 SP sa RE 5 s Section 2 DC 505A THEORY OF OPERATION INPUT AND TRIGGER AC DC Selection Attenuators And Coupling CHA amp B Channels A and B are identical with regard to the amplifiers The input signal applied through front panel INPUT connector J210 J100 first passes through front panel push button switch S215A S105A to select ac or dc X1 or X20 attenuation is selected by front panel push button switch 52158 51058 X20 ATTEN is 8 frequency compensated voltage divider composed of resistor R220 R110 and Capacitor C222 C112 The input signal is coupled to the input field effect transistor FET Q235A Q125A which acts as a source follower The RC protection circuitry consisting of capacitor C232 C122 in paralle with resi
125. ment can be checked at any temperature between 0 C and 40 C Make any adjust ment at a temperature between 20 C and 30 C 68 F and 86 F Check that the correct nominal line selector block has been installed on the line selector pins on the Power Module refer to Power Module manual Remove the DC 505A side covers and connect the DC 505A to the Power Module using the Heavy Duty Plug in Extender Allow at least 30 minutes warmup for the DC 505A and all equipment before any adjustment is made 1 Adjust Check Power Supplies Connectthe DM 501 Digital Voltmeter between the 15 V Test point TP1 and ground Adjust R17 for a reading of 15 00 V Check the 5 V TP2 and 10 V TP3 supplies to be within 5 Disconnect voltmeter 2 Adjust Internal Time Base 1 MHz Clock a Connect 1 MHz Frequency Standard 2 parts in 10 to Ext Trig input of the test oscilloscope Apply via 10X Probe the 1 MHz Clock signal 14A from DC 505A to Vert Input of the oscilloscope Set oscilloscope time base for a calibrated 0 2 us div sweep rate Adjust oscilloscope controls for a vertical amplitude display may be drifting horizontally b Adjust C905 through small hole in trigger circuit board for minimum horizontal drift of the displayed signal When C905 is properly adjusted the horizontal drift must be equal to or less than 5 div 10 sec This sets the 1 MHz Clock to within 1 partin 10 Disconnect Frequency Standard and 10X Probe N
126. nd Sampling Oscilloscope system Tektronix 5403 D40 5A38 5B40 and Tektronix 5S14N Sampling Unit 8 10X Probe Tektronix P6060 9 100X Probe Tektronix P6057 10 Function Generator Tektronix FG 501 or FG 502 11 Sealectro adapter to BNC connector cable furnished with DC 505A Tektronix Part Number 012 0532 00 12 2 50 0 BNC Coaxial Cables Tektronix Part Number 012 0057 01 13 50 Q 10X 20dB Attenuator Tektronix Part Number 011 0059 02 14 50 Q Feedthrough Termination Tektronix Part Number 011 0049 01 15 Dual Input Cable BNC Connectors Tektronix Part Number 067 0525 00 16 Adapter BNC Tektronix Part Number 103 0030 00 SHOLOANNOD 5 LNAWdINDSA 1531 ALDJUOFIVIEINIS DC 505A Calibration Interval Check the adjustments calibration of the DC 505A every 1000 hours of operation or every six months if used infrequently Before calibration thoroughly clean and inspect this instrument refer to Power Module instruction manual Test Equipment Test equipment and accessories required for adjustments and measurements for the DC 505A are listed under TEST EQUIP MENT REQUIRED Services Available Tektronix Inc provides complete instrument repair and calibration at local Field Service Centers and at the Factory Service Center Contact your local Tektronix Field Office or representative for further information Procedure NOTE The performance of this instru
127. nector that provides a shaped 0 2 V output signal derived from the output of the channel A shaper circuit The signal is high during the duration of the triggering window forthe A input signal Lights during the active gating interval DC 505A IVERSAL COUNTAR TIMER LEVEL Selects the amplitude point on the input signal al which the triggering window is placed Also selects signal input source Pulled out selects the rear connector input Pushed selects the front panel BNC connector Input SLOPE A push push switch which selects the slope of the input signal on which triggering will occur ATTEN Self canceling button selects X1 or X20 attenuation of the input signal INPUT BNC connector for signal input Input Coupling A push push switch which selects whether the input signal is AC or DC coupled into the attenuators TEKTRONIX LEVEL QU B or OUT Connector Connector which provides a shaped 0 2 V output signal derived from the output of the channel B shaper and FUNCTION circuit for the RATIO A B PERIOD B WIDTH B and EVENTS A DURING B modes of the FUNCTION switch The shaped 0 2 V output signal for the of the FUNCTION switch is derived from the output of the time A B circuit The signal is high during the duration of the triggering window for the B input signal in the RATIO A B PERIOD B WIDTH B and EVENTS DURING B modes In the TIME mode the s
128. nformation in your order Part number instrument type or number serial number and modification number if applicable If a part you have ordered has been replaced with a new or improved part your local Tektronix Inc Field Office or representative will contact you concerning any change in part number Change information if any is located at the rear of this manual SPECIAL NOTES AND SYMBOLS X000 Part first added at this serial number 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 This mechanical parts list is indented to indicate item relationships Following is an example of the indentation system used in the description column 12345 amp Description Assembly and or Component Attaching parts for Assembly and or Component Detail Part of Assembly and or Component Attaching parts for Detail Part Parts of Detail Part Attaching parts for Parts of Detail Part Attaching Parts always appear in the same indentation as the item it mounts while the detail parts are indented to the right Indented items are part of and included with the next higher indentation The separation symbol indicates the end of attaching parts Attaching parts must be purchased separately unless otherwise specified ITEM NAME in the Parts List an Name is separated from the des
129. nt is automatically positioned and the leading zeros to the left of the most significant digit or decimal point are blanked Digit overflow is indicated by a flashing display Signals to be counted timed can be applied to either or both channel A or channel B front panel bnc connector or to the rear interface connector The DC 505A is designed to operate in a TM 500 Series Power Module POWER MODULE Barrier The DC 505A can be ordered equipped with a temperature compensated 5 MHz crystal oscillator to obtain a highly stable and precise internal time base This option includes a divide by five IC counter to produce the 1 MHz clock The triggering level of CH Aor CH Bcan be adjusted to a fixed voltage level by monitoring a dc voltage at a front panel LEVEL OUT jack or at the rear interface Installation The DC 505A is calibrated and ready for use as received Turn the Power Module OFF before inserting the instrument Do not useexcessive force when installing the DC 505A and be certain that the front panel of the instrument is aligned with the edges of the Power Module compartment Refer to Fig 1 1 install the DC 505A and turn the Power Module ON PLUG IN Fig 1 1 Plug in installation removal REV A APR 1977 1 1 Operating Instructions DC 505A When DC 505A s with serial numbers B010630 and above are to be installed in the low power compartments of a particular TM 500 Power Module modifications to the Power
130. o has a zero blanking feature that allows suppression of the zeros leading the most significant digit MSD in the display At the non displayed referencing time slot 5 0 a low is applied to the direct clear input pin 1 of U765A the zero suppression storage register This sets U765A to the zero suppress state high at pin 6 allowing the Ripple Blanking Input RBI pin 5 of U780 to be low When the output of U755 resets to the MSD TS 1 the RBI of U780 remains low for a few nanoseconds due to propagation delays which allows the first digit to arrive from the latches while RBI is low If this first digit being decoded is a Zero the output to the display LED will be inhibited and the Ripple Blanking Output RBO pin 4 will be low If the digit is not a zero the outputs are enabled and RBO goes high The RBO is applied to pin 2 input of U765A and is transferred to the output when the next scan clock transition occurs Thus if the first digit is a zero pin 5 of U780 is held low inhibiting the output until the first non zero digit comes through the decoder when the first non zero digit arrives the outputs of U780 are enabled and the digit is displayed Also the RBO output at pin 4 is set high removing the RBI from pin 5 and allowing all succeeding digits to be displayed through the TS 7 sequence When the scan gets past a decimal point in the display or if the display overflows any zeros arriving at the decoder are display
131. ons Regulated Power Supplies Operating power is obtained from the power module mainframe then rectified filtered and regulated to provide stable supplies of 15 volts 5 volts and 10 volts The 15 volt supply whose active device is U10 provides the reference for the remaining supplies Its output is set to exactly 15 volts by adjustment of R17 Integrated circuit U30 regulates the 5 volt supply and transistors Q65 Q68 and Q80 regulate the 10 volt supply The series pass transistors for these supplies are located in the mainframe where they can be provided the proper heat dissipation ma m lt G E 1 Ti E 88 J i 5 EN 1 E Section 3 DC 505A REPLACEABLE ELECTRICAL PARTS PARTS ORDERING INFORMATION Replacement parts are available from or through your local Tektronix Inc Field Office or representative Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest circuit improvements developed in our engineering department It is therefore important when ordering parts to include the following information in your order Part number instrument type or number serial number and modification number if applicable part you have ordered has been replaced with a new or improved part your local Tektronix Inc Field Office or representative
132. ormation transferred into the display must be from that portion of the waveform which represents only the width or duration of the pulse The input width signal is nanded with the main GATE to get a pulsating gate through pins 4 5 and 6 to pin 3 of U345A which arms and disarms U342 The DC 505A will make a single shot period measure ment as small as 30 or 40 ns However for a period consisting of a very narrow pulse perhaps 2 to 3 ns it is necessary to ensure that the gate which arms and disarms U342 will occur once even though the displayed reading would not be meaningful For input signals longer than 30 or 40 ns the time interval of the main GATE coming from U590 to the display is accurate in absolute value to within 10 ns For a very narrow pulse 2 or 3 ns pin 3 of U400 will go from low to high on the step edge of the narrow pulse and will be coupled through to pin 4 of U500A beforethe GATE open signal can get to pin 5 of U500A If pin 4 of U500A is already low when the GATE starts through pin 5 of U500A the GATE start level coupled across Q506 from U590 then pin 2 of U500A will go low as soon as the GATE starts causing pin 14 of U495C to go high Resistor R512 between pin 14 of U495C and pin 9 of U500B and capacitor C526 to ground causes a 2 5 ns time delay slowing the signal to pin 9 until after the GATE start signal from pin 14 U497C has been disabled via pin 2 of U495A to pin 10 of U497C This ensures that a double pulse
133. paralleled by approximately 24 pF Maximum Input Voltage sine waves dc peak ac X1 Attenuation 50 V at 10 kHz or less derate 20 dB CH A CH B decade to 100 kHz 5 V at 100 kHz to 225 MHz X20 Attenuation 250 V at 1 MHz or less derate 20 dB CH A or CH B decade to 50 MHz 5 V at 50 MHz to 225 MHz Trigger Level Range 2 V times attenuation to 2 V times attenuation Trigger Level Output At least 2 V 2 V Monitored at front panel jack or CH A or CH B pin 22 at rear interface Signal Source Internal rear connector interface Selected by pushing in or pulling out or external front panel bnc front panel LEVEL control 9 REV B AUG 1977 1 11 Operating Instructions DC 505A Characteristics FREQ Accuracy RATIO A B Accuracy PERIOD B Accuracy Resolution TIME Accuracy Resolution Practical Limit TABLE 1 7 Display Resolution and Accuracy Performance Requirements 1 count time base accuracy 1 count of FREQ trigger jitter error of channel B see Note 1 Frequency into A 0 3 X 10 1 count time base accuracy trigger jitter error of count B see Note 1 2 counts applies to 10 ns clock rate only 1 count time base accuracy trigger jitter error of channel A see Note 2 chosen time base period VN channel delay match error of 2 ns 10 ns B input step volts to Volt LEVEL setting of B A input step volts to
134. per channels read the elapsed time interval between the triggering level of CH A and the subsequent triggering level of CH B Time Interval Averaging Time interval averaging provides an economical method of greatly increasing the accuracy and resolution of time interval measurements on repetitive signals The basis of time interval averaging is the statistical reduction of the 1 count error If the 1 counterror is truly random then as more intervals are averaged the measurement will tend to approach the true value of the time interval For time interval averaging to work the time interval being measured must be repetitive and have a repetition fre quency that is non synchronousto the counter clock rate Time interval averaging of N gt 1 should be used whenever the 1 count error of a repetitive signal averaging switch actually set to 1 significantly degrades the accuracy and resolution of the measurement When a measurement is made and the least significant digits appear unstable due to inherent instrument noise improvements in accuracy and resolution can be obtained by either increasing the average factor N or increasing the CLOCK RATE Single Shot using HOLD Single shot time intervals can be measured in either the TIME or WIDTH B modes by setting the DISPLAY TIME control to the HOLD position For the HOLD position the counter makes a single measurement with the function averaged over cycles of B or di
135. pproximately 0 1 V into open circuit 1 Approximately 0 1 V into open circuit Approximately 15 ns from Channel A INPUT to A OUT or OUT Logic Levels 0 Approximately 0 1 V into open circuit 1 Approximately 0 1 V into open circuit Approximately 15 ns from Channel Inputs to B or A B OUT Operating Instructions DC 505A Supplemental Information Variable from about 0 1 s to about 10 s Detent position at cw position of DISPLAY TIME knob provides a HOLD mode Pushing the front panel RESET pushbutton or grounding pin 26A of the interface connector resets the counter to zero and totally lights the display except for the decimal points for a lamp test Supplemental Information Shaped output after trigger level and slope selection of the signal into channel A INPUT connector Output represents the display infor mation for FREQUENCY A RATIO A B and TOTALIZE A modes 50 reverse terminated Shaped output after trigger level and slope selection of either the Channel B signal or the signal This output represents the continuous signal used in generating the display gating for the RATIO A B PERIOD B TIME A B WIDTH B and EVENTS A DURING B modes 50 5 reverse terminated 1 15 Operating Instructions DC 505A TABLE 1 11 Environmental Characteristics Performance Requirements Supplemental Infor
136. produce the 1 us to 10 us output selected from the CLOCK RATE switch or the GATE signal for the counter The division factor for the GATE signal is selected by placing the appropriate voltage levels on pins 12 through 14 of U895 U895 dividers for the GATE control are reset to all nines for FREQUENCY A operation after the GATE signal has occurred by applying a positive level to pin 6 of U895 This reset allows the counting cycle to restart immediately following a manual RESET or a clear pulse If the U895 dividers were not reset to all nines the delay before the next count could begin would be equivalent to one gate time interval The output from pin 1 of U895 is synchronized with the driving 1 MHz standard through U765B to reduce the jitter of U895 The 1 5 to 10 4s output pin 9 of U765B proceeds to the CLOCK RATE selection circuitry Decimal Point And Parameter Selection Time Interval Modes When the FUNCTION switch is set to any of the time interval measurement settings PERIOD B TIME A B or WIDTH B the proper display of decimal point and parameter light selection is determined by atransistor matrix U922B U922A and U920A B C and D are the TTL gates used in interfacing to the transistor Theory of Operation DC 505A matrix The emitters of the transistors in the matrix define one axis along which the averaging factor is transmitted The bases of the transistors constitute the axis that determine the CLOCK
137. riod 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 waves are preferred Wave shapes other than square waves can be measured accurately at the very low end and if theinput amplitude is kept high so that the trigger input is driven hard TIME INTERVAL MEASUREMENTS General Time interval measurements are performed using the TIME or WIDTH B modes The TIME mode measures and displays the elapsed time interval between the triggering level of CH A and the subsequent triggering level of CH B The WIDTH B mode measures and displays the elapsed time interval between the selected triggering level on the starting slope of the pulse duration to be measured and the same triggering level on the opposite polarity ending slope 1 6 The voltage levels necessary to establish thetriggering points on any selected slope are monitored and set with DVM readings at the CH A CH B LEVEL OUT pin jacks on the front panel or on pin 22A at the rear interface Fig 1 3 illustrates typical LEVEL OUT voltage settings for various time interval measurements Fig 1 3 is limited to positive going pulses above ground reference 0 V but the same procedure is essentially followed for input signals whose peak to peak amplitude falls within the triggering level range
138. splays the count and holds the answer until the operater pushes the RESET button to clear the display and rearm the counter circuits for another single shot measurement EVENT MEASUREMENTS In the EVENTS A DURING B mode signal events applied to CH A INPUT are counted and the accumulated total is displayed for the time that the signal applied to CH B INPUT causes channel B to be triggered high and the counter timer gate opened This mode is similar to the TOTALIZE A mode The following procedure can be used to make a measurement like that shown in Fig 1 4 1 Apply the events to be counted to CH A Set the FUNCTION switch to FREQUENCY A and CH A slope Switch to SLOPE Adjust the CH A LEVEL for a stable frequency display 2 Apply the counter timer gate open control signal to CH B Set the FUNCTION switch to PERIOD B and CHB 1 8 slope switch to SLOPE Adjust the CH B LEVEL for a stable period display 3 Set the FUNCTION switch to EVENTS A DURING 4 When the CH B signal excursion occurs CH B is triggered and the gate opens allowing the CH A pulses to be counted Averaging Averaging provides an economical method of in creasing the accuracy and resolution of repetitive event per interval measurements The basic of averaging is the statistical reduction of the 1 count error If the 1 count error is truly random then as more intervals are averaged the measurement will tend to approach the true value of the number
139. stor R232 R122 transmits the signal to reverse biased diode CR232 CR122 at the gate of the input FET s Input Amplifier Signal Shaping Slope Selection And Output The source follower Q235A Q125A couples the signal to the base of an emitter follower Q240 Q130 that drives a complimentary cascode amplifier Q242 0270 Q132 and Q160 Adjustment of the LEVEL control at the base of Q270 Q160 changes the bias on that transistor selecting which portion of the input signal will trigger the DC 505A Resistors R264 and R265 R154 and R155 ganged around the LEVEL control R260 R150 in conjunction with resistors R262 and R258 R152 and R148 from either end represent a reverse S Curve This allows good sensitivity at the center with a wide dynamic range in excess of 20to 1 necessary for the X20 attenuation The diode CR264 CR154 between the center arm of the LEVEL control and the resistor R268 R158 at the base of Q270 Q160 provides first order temperature compensation The collector of Q270 Q160 is the output of the trigger amplifier which has a gain of approximately 5 This is coupled through emitter follower Q275 Q165 to a Schmitt Trigger Q280 and Q282 Q170 and Q172 The output of this signal shaper the collector of Q282 Q172 e is ECL compatible and drives the slope selection gate U190B U190C The SLOPE switch S295 S185 selects the triggering slope by allowing either a high or a low to dr
140. sure stable triggering See Fig 1 2 The LEVEL control adjusts over 2 0 V of the input signal in the X1 attenuation position This level can be monitored at the front panel LEVEL OUT pin jack 40 millivolt Noise Impulses typical hysteresis window f lI lI L P l A Erroneous count zB jt p B Correct count Fig 1 2 Triggering circuit responses to improper A and proper B LEVEL settings REV A APR 1977 J d 4 1 Operating instructions DC 505A FREQUENCY MEASUREMENTS FREQUENCY A To measure and display the frequency of a signal up to 225 MHz set the FUNCTION switch to one of the shorter GATE TIMEs bracketed under the heading of FRE QUENCY A Make sure the LEVEL control is pushed in and connect the signal to the CH A INPUT Set the DISPLAY TIME control Triggering A LEVEL Slope Coupling and attenuator controls all affect the ability to make a measurement In general the trigger controls are similar to oscilloscope controls except that the end result is not a stable waveform graphic display but a stable digital frequency display Coupling and Slope Use ac coupling for most frequen cy measurements to avoid re adjusting the LEVEL control for changing dc levels The repetitive nature of the signals makes Slope selection insignificant for frequency measurements Attenuators and LEVEL Signals less than 3 V peak to pe
141. suring PERIOD TIME and WIDTH B The GATE control circuit drives the 10 decade coun ting unit DCU It also includes an arming mechanism 2 3 Theory of Operation DC 505A which is necessary in statistical averaging for time interval measurement The GATE arming for display accumula tion is U342 a very fast D type edge triggered ECL device The first decade counter 10 located on the Trigger circuit board is composed of U350 which divides by 2 and a ring counter U355A U355B and U360B which divides by 5 The outputs are not BCD coded on this circuit board The 10 DCU supplies four lines via interconnecting cable to the Main Board These are decoded from ECL to TTL levels by four transistors Q640 Q655 Q660 and Q670 which in turn drive U655 and U657 gates to derive aBCD code for the first display latch U652 This storage register provides the least significant digit LSD which is the first digit on the right in the display The signal on the fourth line 24 is converted to a TTL level and transferred into 14 of U675 to advance the next decade counting unit 10 DCU Its corresponding storage register is U676 The 10 DCU U678 is latched by U679 The rest of the display dividing and subsequent latching and displaying takes place in U600 a P channel MOS four decade syn chronous counter The signal from pin 11 of U678 is transferred to U700 through transistor Q680 which creates 1 pulses that are r
142. to identify components or assemblies on the diagrams A Assembly separable or repairable H Heat dissipating device heat sink S Switch or contactor circuit board etc heat radiator etc T Transformer AT Attenuator fixed or variable HR Heater TC Thermocouple B Motor HY Hybrid circuit TP Test point BT Battery J Connector stationary portion Assembly inseparable or non repairable Capacitor fixed or variable K Relay integrated circuit etc cB Circuit breaker L Inductor fixed or variable v Electron tube CR Diode signal or rectifier M Meter VR Voitage regulator zener diode etc DL Delay line Connector movabie portion Wirestrap or cable DS Indicating device lamp 6 Transistor or silicon controlled Y Crystal E Spark Gap rectifier 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 0 Dot indicates switch closure Internal Screwdriver Adjustment Strap or Link L Plug to E C Board Box Identifies Panel Controls Connectors and Indicators Modified Component See Parts List Depicted in grey or with grey outline Plug Index SEL Value Selected at Factory Refer to Waveform Refer to Diagram Number Coaxial Connector Test Voltage Shielding Heat Sink Decoupled or Filtered Voltage Assembly Number Board Name RIO Etched Circuit Board Outlined 1 99 12
143. triggers with the LEVEL controls Select SLOPE for one channel and SLOPE for the other channel Set FUNCTION to TIME A B CLOCK RATE switch to 1 ms and N switch to 1 Rotate CH A LEVEL back and forth through its selected slope until the GATE light turns on Rotate CH B LEVEL back and forth through its selected slope until the GATE light turns off The resultant display is the time interval between these two trigger events If the GATE light cannot be turned on or off with this method consult the Service section of the manual for troubleshooting aids Operating Instructions DC 505A RATIO A B Check Connect an approximately 1 to 5 MHz signal from a signal source for example the SG 503 into the input of both CH A and using a Dual Input Coupler Tektronix Part No 067 0525 00 Set the FUNCTION control switch to RATIO A B SLOPE on both channels Check the readout display according to Table 1 4 Change both channels to SLOPE and make the same check of the readout display using Table 1 4 TABLE 1 4 Decimal Point N Switch 1 count 10 1 00000 10 1 0000 10 1 000 10 1 00 10 1 0 1 1 INPUT CONSIDERATIONS Input Sources The switch concentric with the LEVEL control of each channel selects either the front panel bnc connector external or the rear interface connector internal pins Channel A via pin 16A and Channel B via pin 178 The External inputs present high impedance of ap proximately 1
144. ve edge triggered flip flops U315A and U315B These flip flops hold off Channel B until after a positive going signal from Channel A into the clock input pin 6 toggles the first D edge trigger which arms the second D edge trigger A positive going signal is thus allowed into clock input pin 11 to cause a stop signal To ensure that A is ready to start a CLEAR signal comes into pin 15 and pin 5 of U315 so that each TIME A B measurement always starts with A after the previous measurement 2 1 Theory of Operation DC 505A AVERAGING AND CONTROL Averaging Divider The Averaging Divider averages over 1 to 10 cycles of or selected by the switch on the front panel ensure proper gating of averaged pulses in width or period mode the output of the Width or Period Selection pin3 of U340B and pin 15 of U340D is used to activate the Averaging Divider For example in producing a gate for Period measure ment the positive edge transition from or is supplied to pin 5 of U340A coupled through to pin 2 of U340A and from pin 7 to pin 3 of U340B into pin 9 of U400 This first signal edge low to high is ignored by 4400 since pin 5 of U400 is held high because of the signal from pin 3 of U390 The B or signal supplied to the Width or Period Selection circuitry is coupled into pin 9 of U390 This toggles U390 a fast D type positive edge triggered ECL device causing three events First the signal
145. w measurement is made and displayed DISPLAY TIME and GATE TIME together complete 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 At the 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 turning the DISPLAY TIME control cew or changing to another GATE TIME 1 5 Operating Instructions DC 505A RATIO MEASUREMENTS In the RATIO A B mode the frequency of the signal applied to CH A is divided by the frequency of the signal applied to CH B and the resultant ratio is displayed Note that the normal frequency mode is basically a ratio mode in which the ratio of the unknown signal to the internal clock is displayed Decade scaling of the internal clock and decimal point positioning normalizes the dis play relative to kHz or MHz units Triggering The operation of CH A and CH trigger controls is the same as for frequency and period measurement In fact since both channels must be triggered to obtain a display it may be desirable to set the trigger controls independent ly This may be accomplished as follows 1 Go to the FREQUENCY A mode and adjust the CHA trigger controls for a normal frequency measurement 2 Go to the PERIOD B mode and adjust the CH B trigger controls for a norm
146. will occur at pins 1 and 13 of U590 The total cycle from GATE start to GATE stop takes 30 to 40 ns minimum This is the factor that limits the accuracy of single shot measurements less than 30 or 40 ns Width or Period measurements longer than 40 ns single shot ac curate to within 10 ns due to gating errors Theory of Operation DC 505A The 01 5 to 10s logic for the GATE time in FRE QUENCY A comes via the 1 us to 10 s line to 9 of U587C This signal is coupled to pin 7 of U497B and is transferred to pin 10 of U500B which in turn is coupled to pins 1 and 13 of U590 This signal path both starts and stops the GATE in FREQUENCY Manual GATE operation is used in TOTALIZE A operated through the front panel switch to pin 10 of U590B for that function only Phase Lock Loop The Phase Lock Loop is used to generate higher frequencies from one stable low frequency source Basically the phase detector compares the phase of two 1 MHz signals The first is generated by the internal clock the second is the output of the 100 MHz voltage controlled oscillator VCO divided by 100 If the two signals differ in phase an error voltage is generated and applied across a varactor diode to the VCO This corrects the output of the VCO in the direction required for decreasing the phase difference until lock is achieved at which time the VCO will continue to track the internal clock signal The output pin 3 of U875 of the voltag
147. 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 Part removed after this serial number ITEM NAME In the Parts List an Name is separated from the description by a colon Because of space limitations an Item Name may sometimes appear as incomplete For further Item Name identification the U S Federal Cataloging Handbook H6 1 can be utilized where possible ABBREVIATIONS ACTR ACTUATOR PLSTC PLASTIC ASSY ASSEMBLY QTZ QUARTZ CAP CAPACITOR RECP RECEPTACLE CER CERAMIC RES RESISTOR CKT CIRCUIT RF RADIO FREQUENCY COMP COMPOSITION SEL SELECTED CONN CONNECTOR SEMICOND SEMICONDUCTOR ELCTLT ELECTROLYTIC SENS SENSITIVE ELEC ELECTRICAL VAR VARIABLE INCAND INCANDESCENT WW WIREWOUND LED LIGHT EMITTING DIODE XFMR TRANSFORMER NONWIR NON WIREWOUND XTAL CRYSTAL 3 1 Replaceable Electrical Parts DC 505A Mfr Code 00853 01121 01295 04222 04713 05091 05397 07263 07910 08806 10389 27014 34553 50088 50347 50579 56289 7 034 73400 72982 73138 74970 75042 79727 80009 81483 90201 91418 91637 98291 3 2 CROSS INDEX MFR CODE NUMBER TO MANUFACTURER Manufacturer SANGAMO ELECTRIC CO S CAROLINA DIV ALLEN BRADLEY COMPANY TEXAS INSTRUMENTS INC SEMICONDUCTOR GROUP AVX CERAMICS DIVISION OF AVX CORP MOTOROLA INC SEMICONDUCTOR
148. y TABLE 1 2 N Switch Decimal Point 10 00000 10 0000 10 000 10 00 10 0 1 0 The GATE and units indicators should remain off PERIOD TIME and WIDTH Displays Set the FUNCTION switch to PERIOD B the CLOCK RATE switch to 10 ns and the N switch to 10 Check the readout display according to Table 1 3 Change the FUNCTION switch to TIME Retain the same settings on the CLOCK RATE and N switches Check the readout displays according to Table 1 3 Change the FUNCTION switch to WIDTH B and make the same check of the readout displays using Table 1 3 NOTE Table 1 3 and the diagram are drawn as an aid to troubleshooting if the decimal points and units indicators are non functioning or incorrect in any of the time interval measurement settings See Theory of Operation Decimal Point and Parameter Selec tion Table 1 3 Front panel Controls Readout Display UNITS INDICATOR DECIMAL POINT mS 0 mS 0 mS 00 mS 000 uS 0 CLOCK RATE SWITCH us 90 1 ms us 000 5 0 5 00 5 000 5 10 10 N Switch REV A APR 1977 Operating Instructions DC 505A TOTALIZE A Display Set the FUNCTION switch to TOTALIZE A Observe a zero at the right of the readout display The GATE light should turn on when the IN START OUT STOP button is pushed in and turns off when button is released
149. y to the customer Order replacement parts from the Replaceable Electrical Parts List 4 3 441 3 1534 3 33NY H CALIBRATION TEST EQUIPMENT REPLACEMENT Calibration Test Equipment Chart This chart compares TM 500 product performance to that of older Tektronix equipment Only those characteristics where significant specification differences occur are listed In some cases the new instrument may not be a total functional replacement Additional support instrumentation may be needed or a change in calibration procedure may be necessary DM 501 replaces 7D13 PG 501 replaces 107 108 PG 502 replaces 107 108 111 PG 508 replaces 114 115 2101 PG 506 replaces 106 067 0502 01 SG 503 replaces 190 190A 190B 191 067 0532 01 Comparison of Main Characteristics PG 501 Risetime less than 107 Risetime less than 3 5 ns into 50 0 3 0 ns into 50 Q PG 501 5 V output pulse 108 10 V output pulse 3 5 ns Risetime 1 ns Risetime PG 502 5 V output 108 10 V output PG 502 Risetime less than 111 Risetime 0 5 ns 30 1 ns 10 ns to 250 ns Pretrigger pulse Pretrigger pulse delay delay Performance of replacement equipment is the same or better than equipment being replaced PG 506 Positive going 106 Positive and Negative trigger output sig going trigger output nal at least 1 V signal 50 ns and 1 V High Amplitude out High Amplitude output put 60 V 100 V

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