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Fluke 7260A, Instruction Manual

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Summary of Contents for 7260A

Page 1: ...ing from use of this manual NOTE This manual documents the Model 7260A and its assemblies at the revision levels shown in Appendix 7A If your instrument contains assemblies with different revision letters it will be necessary for you to either update or backdate this manual Refer to the supplemental change errata sheet for newer assemblies or to the backdating sheet in Appendix 7A for older assemb...

Page 2: ...oduced With Permission It is our understanding from your request dated January 23 2001 that the purpose for copying these manuals is to include them in the GIDEP database and that the material won t be copied for any other purpose Thank you for your cooperation and for your interest in Fluke Sincerely Beverly A Summers Paralegal Fluke Corporation Intellectual Property Law Dept Direct 425 446 5770 ...

Page 3: ...rest Service facility giving full details of the difficulty and include the model number type number and serial number On receipt of this information service data or shipping instructions will be forwarded to you 2 On receipt of the shipping instructions forward the instrument transportation prepaid Repairs will be made at the Service Facility and the instrument returned transportation prepaid SHI...

Page 4: ...hese conditions exist l The revision letter stamped on the indicated PCRis equal to or higher than that given with each change 2 No revision letter is indicated at the beginning of each change Title 7260ADNIVFRSAL COUNTER TIMER Print Date JANUARY 1979 Rev and Date 2 2 81 C E PACEEFFECIXVITY PageNo Print Date 1 7 79 2 7 79 3 7 79 4 7 79 5 7 79 6 7 79 7 9 80 8 9 80 9 9 80 10 9 80 11 S 81 12 S 81 ...

Page 5: ...e Rl9 CHAKE t2 12133 REv C Direct C Amy 520 MHz 7260A 4003T On page 63106 CHAGE C5lcAp TA 20 UF 20 20V1161927l56289119D225X0020KAl I161927156289 119D225X0020KA To C5lCAP TA 2 2 UF 20 2ov I1 111 CHANGE 3 12153 On page 5 3 WE MP17ICOVER ToP1489310189536148931011 Xk MPl71COVER TOP1509414 95361509414l1 ERRATA fl On page 5 3 ADD Fl ElFUSE MEZRIC l 4A szo BLO 100 12OV 1505180189536 ADD Fl EZLIFUSE METRI...

Page 6: ...equency TO Frequency FROM Minimum Pulse Under Period Average A FROM Range TO Range FROM Frequency Range TO Frequency Range FROM Minimum Pulse TO Minimum Pulse B O 2 MHz B O 2 m N X A B fFREQ A X N l count Frea A X wrror B N FREO B zer Error B FREQA X N r N 100 nS 99 999 99 S before overflow 100 nS 999 999 99 S before overflow 5 Hz IMHz sinewave 0 Hz 2 MHz sinewave 500 nS 5 Hz 100 kHz 250 nS 100 kH...

Page 7: ...RINGTHE DEADTIME ONPAGE l 4 UN ERSIGNALINPUTS CHANNEL A B FRal BANlmIDTH 5 125 MHZ AC COUPLED m BANlmIDTH 5 HZ 125 MHZ AC COUPLED FRCJM MINIMUM PULSE 10 NSAT 50 MVPEAK To MINIMUMPULSE 50 NSAT 50 MVPEAK FRCM CHANNELINPUT SEPARATEORCCXdb0N SWITCHABLE TO CHANNELINPUT SEPARATE ORCONA ITCHABLE UIiDER TIME BASE FR Xl STABILITY 0 SO C To STABILITYcoo 40 C ONPAGE l 5 UNDER Ol J ION TIMEBASE 10 MHZ FROM AC...

Page 8: ...Line 13 FROM will count 10 cycles TO will count 15 cycles Line 15 FROM 1000 The display will show 1 000 US TO 1500 The display will show 1 500 US On page 3 7 Add the following sentence to the end of para 3 29 unless the effective repetition rate falls below 250 kHz nominal On Figure 3 8 change the name of the 100 MHz waveform TO MHz On page 3 11 DELETE refer to Time Interval Average Logic for an e...

Page 9: ...DTHE50 OHM TERM PARA 4 31 STEP4 czH uqx OF 10 HZ AT 100 MVRMS To I OF 10 HZ AT l COUNT AT 100 MVRMS PARA 4 31 STEP5 CHANGE OF 1000000WITHNJ UNITSANNUNCIATOR To PF 1000000 lOO COUNTS WITHm UNITSANNUKIATOR ADD tl COUNT TOTHEENDOFSTEP7 ONPAGE 4 9 PARA 4 47 ENDOF STEP4 ANDSTEP7 ADD 21 COUNT PARA 4 49 ENDOF STEP5 ADD l COUNT PARA 4 49 STEP6 CIIANGE 0 0010 To O 0200 PARA 4 49 STEP8 CLJANGE 25 MS TO 20 M...

Page 10: ...536 481796 1 CHANGE THEDESCRIPTION 0F MP14 FmM CHANNEL A B ANDOFF To CHANNEL q B ANDHOLDOFF ONPAGE 5 11 DELETE EQSNAEH GATES CHANGETHEPAFU NUMBERS U28 U29 FROM ul2 ul3 Gi ul9 FRCM TO u32 FWM To u37 FROM TO FR0MTHEDESCRIFTION OF U9 ANDORDESCRIFTIONF0RTHEF0LL dING ITEMS SN74157N To SN74LS157N 5526111802 To 895361460063 895361473215 To 55261lLS7031 IC TI L C0UNTERl895361483594 IC TTL COUNTER DUALDiKA...

Page 11: ...INSULATOR XSI Rl412809l13103143 03 211 lD MP IINSULATOR XSI R15344531895361S34453 1 ADD MP20IINSULATOR XSI R1S28611189536152861111 On page 5 7 Add MP20 identical to MP9 between U44 and the side of the heatsink HF8 On page S 8 Changethe TOTQIY of CS FROM 5 TO 7 ADD CSOICAP TA 10 LJF 20 20V13306621562891196D106X0020KAlIREF ADD C51ICAP TA 10 UF 120 20v13306621S62891196D106X0020KAllREF On page S 9 Cha...

Page 12: ... f CR5 u44 E8 VIN VOUT ADJ R62 I 1 0 K Vo Figure 2 On page 8 6 Add ES1470 between U39 11 and P4 20 node 01 page 8 7 Delete all reference of R28 R29 and their 5V supply Add RN74 7K to the pins of U22 as follcws m 10 to U22 9 RN7 9 to U22 7 RN7 8 to U22 5 RN7 7 to U22 3 FUG 5to U22 13 RN 4 to U22 11 RN7 2 to U22 17 RN7 1 to 5V Ul3 27 RN 6 is not used CHAEJGE P7 13168 13323 l V D Direct Channel C Ass...

Page 13: ...v K 8 15 Changethe symbol of CR6to a conventional diode not a varactor The symbols for Cl C2 C4 C5 are reversed please correct Removethe 12V column from the top of the page Makethe changes as shown in Figure 3 4 5v NS 4 5V NS P6 9 Z P6 33 Fe 8 Iii 7 Figure 3 13967 Al Main PCBAssy 7260A 4001T 5 8 CHAKGE C16lCAP MICA 5000 PF 5 500V 181065 72136 DMl9F502J 1 TO C16ICAP FIXED 0068 UF 210 200V1342881l80...

Page 14: ... NOISE UNCERTAINTY IN CROSSING TIME Figure 2 8 Noise and Distortion Effects Figure 4 On page l 2 Add the following specification to the bottan of the GENERAL column PlWlECTION CLASS Class 1 As defined in IEZ 348 CHANGE 9 13979 14089 Rev E Direct Channel C Assy 7260A 4003T On page 6310 6 ChangethTVZQIY of R2 FLUX 4 To 6 9 80 10 ...

Page 15: ...222 638 10229 1 CAP CER 0 01 UF 20 1OOV CAP CER 0 22 UF 202 50V CHOKE 6 TURN PINS CONTACT NOT SHOWN RES Ml L FILM 47 5 l 1 8W 407361 72982 8121 AlOO W5R 103M 1 309849 71590 CWjOC224K 1 320911 89536 320911 1 376574 00779 j 87022 1 5 306076 91637 CMF5547R5F 1 RES COMP 560 55 1 0W 115303 01121 RES COHP 1K 52 1 8W 153916 01121 RES COMP 560 55 1 8W 115303 01121 RES COUP 560 55 l W 115303 01121 RES COMP...

Page 16: ...On page 8 U replace Figure 8 5 with Figure 6 V s 21page 8 5 Figure 6 Add to the Time E3ase circuit SE36 to 5V makethe char as shown in Figure 7 5 81 Figure 7 12 ...

Page 17: ...NG NOTES 2 2 AC Line Connection 2 2 Maximum Inputs 2 2 Counter Timer Terminology 2 5 Function Control 2 8 Resolution Control 2 8 Separate Common Control 2 9 Attenuation Control 2 9 Slope Control 2 9 Filter Control 2 9 Trigger Level Control 2 9 TI Holdoff Control 2 10 Display 2 10 Trigger Mode Control 2 10 RemoteOperation 2 10 i ccuracy 2 10 Dealing with One Count Error 2 l I Reducing Time Base Err...

Page 18: ......

Page 19: ...9 Totalize A Function Test 4 10 Self Check Function Test 4 10 Autoranging 4 10 Filter Test 4 10 External Reference Input Test 4 1 I Reference Output Test 4 11 Marker Output Test 4 l I Trigger Mode Test 4 12 CALIBRATION 4 12 Time Base Calibration 4 12 Coarse Time Base Adjustment 4 13 Trigger Level Adjust Channel A 4 14 Trigger Level Adjustment Channel B 4 14 TROUBLESHOOTING 4 14 Introduction 4 14 V...

Page 20: ...lock Diagram 3 2 Frequency Measurements 3 4 Counts Per Minute Measurements 3 4 Ratio Measurements 3 5 Period Measurements 3 5 Period Averaging Measurements 3 6 Time Interval Measurements 3 6 Time Interval Average A B Measurements 3 7 Totalize A Gated by B Measurements 3 8 SelfCheck 3 9 Input Circuitry 3 10 Time Interval Average Logic 3 13 Time Interval Average A B Measurements 3 14 Resolution 100 ...

Page 21: ...K Function Display 2 16 MainGatelnputs 3 3 Display Readout in Self Check Mode 3 9 Function Decoding U38 3 11 Multiplier Inputs Outputs U28 U29 3 15 Control Pin Designations 3 16 Control Logic Decade Inputs Outputs 3 17 Required Test Equipment 4 1 MOS Type Integrated Circuits 4 4 Time Base Performance Check 4 6 Display Test 4 8 Time Interval Test 4 9 Time Interval Average Test 4 10 Marker Output Te...

Page 22: ...7260A ...

Page 23: ...activated for both channels 1 7 Frequency measurements may be made from 0 to 125 MHz With the Channel C option installed this range may be extended to 520 MHz Ratio or totalize inputs to Channel B and Period or Period Average inputs to Channel A can be made to 2 MHz Time Interval and time interval averaging can be measured to 5 MHz Section 1 Introduction Specifications 1 8 A number of options and ...

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