Atec Tektronix-1502 User Manual

TM 9-4935-601-14-3&PTECHNICAL MANUALOPERATOR, ORGANIZATIONAL,ANDDS/GS MAINTENANCE MANUAL(INCLUDING REPAIR PARTS)FORTEKTRONIX1502 TIME DOMAINREFLEC

TM 9-4935-601-14-3&PSPECIFICATIONGeneral InformationThe Tektronix 1502 is a portable Time Domain Reflectometer that uses pulses to test cables and

TM 9-4935-601-14-3&PCROSS INDEX-MFR. CODE NUMBER TO MANUFACTURERMfr. Code Manufacturer Address City, State, Zip0000M SONY/TEKTRONIX CORPORATION P

TM 9-4935-601-14-3&PCROSS INDEX-MFR. CODE NUMBER TO MANUFACTURERMfr. Code Manufacturer Address City, State, ZipT1063 SCHOOFS INC. P O BOX 67 MORAG

TM 9-4935-601-14-3&PFig. &IndexTektronix Serial/Model No. MfrNo, Part No. Eff DscontQty 1 2 3 4 5 Name & Description CodeMfr Part Number1

TM 9-4935-601-14-3&PFig. &IndexTektronix Serial/Model No. MfrNo, Part No. Eff DscontQty 1 2 3 4 5 Name & Description CodeMfr Part Number1

TM 9-4935-601-14-3&PFig. &Index Tektronix Serial/Model No. MfrNo, Part No. Eff Dscont Qty 1 2 3 4 5 Name & Description Code Mfr Part Numb

TM 9-4935-601-14-3&PFig. &IndexTektronix Serial/Model No. MfrNo, Part No. Eff DscontQty 1 2 3 4 5 Name & Description CodeMfr Part Number2

TM 9-4935-601-14-3&PFig. &IndexTektronix Serial/Model No. MfrNo, Part No. Eff DscontQty 1 2 3 4 5 Name & Description CodeMfr Part Number2

TM 9-4935-601-14-3&PFig. &IndexTektronix Serial/Model No. MfrNo, Part No. Eff DscontQty 1 2 3 4 5 Name & Description CodeMfr Part Number2

TM 9-4935-601-14-3&PFig. &IndexTektronix Serial/Model No. MfrNo. Part No. Eff DscontQty 1 2 3 4 5 Name & Description CodeMfr Part Number2

TM 9-4935-601-14-3&PFig. &IndexTektronix Serial/Model No. MfrNo, Part No. Eff DscontQty 1 2 3 4 5 Name & Description CodeMfr Part Number3

TM 9-4935-601-14-3&PSPECIFICATIONThe performance limits in this specification are valid with the following conditions:The instrument must have bee

TM 9-4935-601-14-3&PFig. &IndexTektronix Serial/Model No. MfrNo, Part No. Eff DscontQty 1 2 3 4 5 Name & Description CodeMfr Part Number3

TM 9-4935-601-14-3&PFig. &IndexTektronix Serial/Model No. MfrNo, Part No. Eff DscontQty 1 2 3 4 5 Name & Description CodeMfr Part Number3

TM 9-4935-601-14-3&PFig. &IndexTektronix Serial/Model No. MfrNo, Part No. Eff DscontQty 1 2 3 4 5 Name & Description CodeMfr Part Number3

TM 9-4935-601-14-3&PFig. &IndexTektronix Serial/Model No. MfrNo, Part No. Eff DscontQty 1 2 3 4 5 Name & Description CodeMfr Part Number4

TM 9-1430-601-14-3&PSCHEMATICS, ACCESSORIES, AND FIGURES10/1/(10-2 blank)

TM 9-4935-601-14-3&PAPPENDIX AMAINTENANCE ALLOCATION CHARTInformation pertaining to Maintenance Allocation Chart (MAC) will be furnished at a late

By Order of the Secretary of the Army:JOHN A. WICKHAM, JR.General, United States ArmyOfficial: Chief of StaffR. L. DILWORTHBrigadier General, United S

TM 9-4935-601-14-3&PSCHEMATIC-PULSER/SAMPLER10-3/(10-4 blank)

TM 9-4935-601-14-3&PSCHEMATIC-TIME BASE GENERATOR10-5

TM 9-4935-601-14-3&PSCHEMATIC-VERT AMPL/SLOW RAMP COMPONENTS10-6

TM 9-4935-601-14-3&PTable 1-2. (cont)ELECTRICAL CHARACTERISTICSCharacteristics Performance Requirements Supplemental InformationFEET/DIV ControlAt

TM 9-4935-601-14-3&PSCHEMATIC-BLOCK DIAGRAM10-7

TM 9-4935-601-14-3&PSCHEMATIC-MAIN BOARD COMPONENTS10-8

TM 9-4935-601-14-3&PSCHEMATIC-VERTICAL AMP/SLOW RAMP10-9

TM 9-4935-601-14-3&PSCHEMATIC-OUTPUT AMPL & HIGH VOLTAGE COMPONENTS10-10

TM 9-4935-601-14-3&PSCHEMATIC-OUTPUT AMPLIFIERS & HIGH VOLTAGE10-11

TM 9-4935-601-14-3&PSCHEMTAIC-LOGIC BOARD COMPONENTS10-12

TM 9-4935-601-14-3&PSCHEMATIC-LOGIC10-13

TM 9-4935-601-14-3&PSCHEMATIC-POWER SUPPLY10-14

TM 9-4935-601-14-3&PSCHEMATIC-POWER SUPPLY10-15

TM 9-4935-601-14-3&PSCHEMATIC-POWER SUPPLY COMPONENTS10-16

TM 9-4935-601-14-3&PTable 1-2. (cont)ELECTRICAL CHARACTERISTICSCharacteristics Performance Requirements Supplemental InformationLine Voltage 117 V

TM 9-4935-601-14-3&P10-17/(10-18 blank)

TM 9-4935-601-14-3&P10-19/(10-20 blank)

TM 9-4935-601-14-3&P1502 TDR CABLE TESTERFigure 1. Cabinet and Access Box10-21

TM 9-4935-601-14-3&P1502 TDR CABLE TESTERFigure 2.. Chassis10-22

TM 9-4935-601-14-3&PAccessories1502 TDR CABLE TESTER10-23/(10-24 blank)

TM 9-4935-601-14-3&PFigure 3. Front and Frame1502 TDR CABLE TESTER10-25

TM 9-4935-601-14-3&PFigure4. Battery Pack1502 TDR CABLE TESTER10-26

PIN: 060428-000

TM 9-4935-601-14-3&PTable 1-2. (cont)ELECTRICAL CHARACTERISTICSCharacteristics Performance Requirements Supplemental InformationWater ResistanceOp

TM 9-4935-601-14-3&PTable 1-2. (cont)ELECTRICAL CHARACTERISTICSCharacteristics Performance Requirements Supplemental InformationDepthIncluding Pan

TM 9-4935-601-14-3&POPERATING INSTRUCTIONSThis section of the manual contains the basic information required for the operation of the 1502 TimeDom

TM 9-4935-601-14-3&PThe 1502 operates from the battery supply for a minimum of 5 hours (including 20 chart recordings). If aTEKTRONIX Y-T Chart R

TM 9-4935-601-14-3&PFigure 2-3. 1502 Front Panel Controls.7. GAIN Screwdriver adjust to set the gain 13. DISTANCE Indicates the distance from the

TM 9-4935-601-14-3&P16. RECORD Two-position lever switch; pushed up and thenreleased, it initiates X-Y recorder or a chartrecorder.17. AC LINEFUSE

TM 9-4935-601-14-3&PWARNINGDANGEROUS VOLTAGEis used to operate this equipmentDEATH ON CONTACTmay result if safety precautions are not observed.Nev

TM 9-4935-601-14-3&P9. Change mp/DIV to 50 and adjust the POSITION controls so the top of the incident pulse is on thehorizontal centerline.10. Pr

TM 9-4935-601-14-3&PThis setting of the FEET/DIV (METRES/DIV) control ensures that the reflected signal will appear in thedisplay window. Measure

TM 9-4935-601-14-3&PFig. 2-7 is a chart for converting reflected pulse amplitude to impedance. Rho is dependent on thecharacteristic impedance,

TM 9-4935-601-14-3&PFigure 2-8. Open Cable. Figure 2-9. Shorted Cable.CHECKING CABLES WITH IMPEDANCE OTHER THAN 50 ΩCables with a characteristic

TM 9-4935-601-14-3&PFigure 2-10. Crimped Cable. Figure 2-11. Frayed Cable.An X-Y recorder can be used with the 1502 by connecting it to the X-Y

TM 9-4935-601-14-3&PNominal C-30B/31B camera settings are:f/stop 5.6-11time 1 secmagnification 1.2 (fixed at 0.5 in C31B)focus as necessaryINSTRUM

TM 9-4935-601-14-3&PTHEORY OF OPERATIONThis section describes the circuits of the 1502 using a combination of block and circuit diagrams on pull-o

TM 9-4935-601-14-3&PSequential equivalent-time sampling is used to develop a display. Two ramps are generated, a fast rampand a slow ramp. The f

TM 9-4935-601-14-3&PDETAILED CIRCUIT DESCRIPTIONPulserThe Pulser consists of three circuits: a Clock Generator, a Logic Programmer, and a Pulse Ge

TM 9-4935-601-14-3&PBias current for tunnel diode CR1703 is provided by R1601 and R1693. Transistors Q1602 and Q1603serve as a switch to direct t

TM 9-4935-601-14-3&PThis material is reproduced through the courtesy of Tektronix Corporation.Distribution is limited to use with the PATRIOT miss

TM 9-4935-601-14-3&PDuring time slots 1 and 2,Q1597 is saturated, discharging memory capacitor C1596. At the start of timeslot 3, Q1597 is cut of

TM 9-4935-601-14-3&PA negative-going signal from the sampler comparator is amplified by Q1553 and the collector output isfed to a fast-rise one-sh

TM 9-4935-601-14-3&PFigure 3-5. Functional Block Diagram of Slow Ramp Generator.Integrator. An inverting amplifier circuit with an FET input is

TM 9-4935-601-14-3&PSweep Inverter with Horizontal Attenuator (Schematic 2)The Sweep Inverter consists of an operational amplifier U1344; selecta

TM 9-4935-601-14-3&PGain Amplifier. The Gain Amplifier consists of U2143 with variable gain provided by R0263. Theincoming voltage is attenuated

TM 9-4935-601-14-3&PFigure 3-6. Block Diagram of 1502 Power Supply. CAUTIONIf the instrument is wired for 220 V operation, be sure that the two

TM 9-4935-601-14-3&PThe output of the astable multivibrator is connected to the fly-back switching circuitry consisting of Q6349(an emitter follow

TM 9-4935-601-14-3&PFigure 3-7. Chart Recorder Logic.Horizontal Correction Network. The Horizontal Correction network compares the output of the

TM 9-4935-601-14-3&PQ5226 will conduct only when the Strip Chart Recorder is plugged in. Q5237 and Q5229 act as a dc levelshift amplifier between

TM 9-4935-601-14-3&PCALIBRATION PROCEDUREThe first part of this procedure checks the electrical characteristics of the 1502 that appear in theSpec

TM 9-4935-601-14-3&PTABLE OF CONTENTSPageLIST OF ILLUSTRATIONS...

TM 9-4935-601-14-3&PPerformance Check1. Make sure the battery pack is in place and connect the unit to the proper AC power source.2. Pull the POWE

TM 9-4935-601-14-3&PPerformance Check11. Remove the 50 Ω terminator and connect the probe adapter to the CABLE connector (SN B040616 andup). Chan

TM 9-4935-601-14-3&PPerformance Check21. Check that the jitter is not greater than 0.1 division (200 ps). See Fig. 4-2.22. Change the MULTIPLIER

TM 9-4935-601-14-3&PPerformance CheckFigure 4-4. Falltime.32. Connect the probe adapter to the CABLE connector if the connector is the grounding

TM 9-4935-601-14-3&PAdjustment Procedure45. Adjust the DISTANCE dial to locate the reflected pulse on each graticule line. The DISTANCE dialshoul

TM 9-4935-601-14-3&PAdjustment Procedure3. Remove the EMI shields from the top and bottom of the unit. Place the battery pack in the rear of the1

TM 9-4935-601-14-3&PAdjustment ProcedureFigure 4-5. Power Supply Test Points And Adjustments.24 (a). Locate the pulse with the ZERO REF control a

TM 9-4935-601-14-3&PAdjustment ProcedureFigure 4-6. Main Board Test Points.35. Check-that the trace aligns with the graticule line within 0.1 div

TM 9-4935-601-14-3&PAdjustment ProcedureTurn the instrument POWER off. Turn the instrument upside down and remove the shield that covers thepulse

TM 9-4935-601-14-3&PAdjustment Procedure(e). Set the FEET/DIV to 5, set the TG 501 to 10 ns and check that when the first time mark is alignedwith

TM 9-4935-601-14-3&PLIST OF ILLUSTRATIONSFigureNo. PageFigureNo. Page1502 Time Domain Reflectometer vi 5-8 Front Panel, Identification of Parts fo

TM 9-4935-601-14-3&PAdjustment Procedure58. Set the FEET/DIV multiplier to X1.59. Set the incident pulse to a graticule reference line with the ZE

TM 9-4935-601-14-3&PAdjustment ProcedureFigure 4-9. Time Marks Aligned (Metric).(b). Check that the chart paper in the recorder has a bold line n

TM 9-4935-601-14-3&PAdjustment Procedure(b). Set CABLE DIELECTRIC to SOLID POLY. Locate two time marks on the graticule with theDISTANCE dial.(c)

TM 9-4935-601-14-3&PAdjustment ProcedureFigure 4-10. Pulse Display.93. Adjust-the front-panel GAIN screwdriver control for a pulse amplitude of 5

TM 9-4935-601-14-3&PAdjustment ProcedureFig. 4-12. Reflected-Fall Time Check.106. Remove the 50 n terminator and checkthat the trace shift is le

TM 9-4935-601-14-3&PAdjustment Procedure114. Move the test lead from R2229 toR2326 (see Fig. 4-13). The DVM should read0.400 0.008 volt.115. Mov

TM 9-4935-601-14-3&PAdjustment ProcedureY OUTPUT10. Move the test leads from the PEN LIFT terminals to the corresponding Y terminals of the X-Y OU

TM 9-4935-601-14-3&PMAINTENANCENOTEIt is recommended that the 1502 be serviced at a Tektronix Service Center. Theinstrument should be serviced by

TM 9-4935-601-14-3&PVisual InspectionPrior to recalibration, the 1502 should be inspected for such defects as broken connections, damagedcircuit b

TM 9-4935-601-14-3&PFigure 5-1. DC Fuse Location.NOTEAll screw fasteners used on circuit boards, on or near a cam switch, should betightened to

TM 9-4935-601-14-3&POPERATORS SAFETY SUMMARYThe general safety information in this part of the summary is for both operating and servicing personn

TM 9-4935-601-14-3&PFigure 5-2. Transistor and Integrated Circuit Lead Configuration.5-4

TM 9-4935-601-14-3&PFigure 5-3. Rear View of The HV Board.Logic Board1. Remove the three pin connectors from the Logic board.2. Remove the four s

TM 9-4935-601-14-3&P2. Lift up carefully on the rear of the cavity shield, applying heat to the solder connections to the bncconnector if necessa

TM 9-4935-601-14-3&PSEALING PROCEDURESNOTEIn the following assembly steps, the part being discussed is identified by its location in the Mechanica

b. Procedure1. Clean mating surfaces of seals with acetone.2. Coat mating surfaces with No. 3144 sealant.3. Install seals in subpanel.6. Installa

TM 9-4935-601-14-3&PNOTE1. Pressing the retainer should cause some of the sealant to appear outside the retainer area, see Fig. 5-7.Failure of th

TM 9-4935-601-14-3&PFigure 5-9. Detail of Plug-In Compartment seal. Figure 5-10. Detail of BNC Connector and Washer.4. Clamp Seal in place.5.

TM 9-4935-601-14-3&P3. Apply bead of No. 3144 sealant to each shaft/seal interface.4. Install pushbuttons in their respective locations.12. Att

TM 9-4935-601-14-3&PFigure 5-14. Detail of Fuseholder Caps. Figure 5-16. Alignment of Battery Meter3. Insert the caps is the Fuseholders and p

TM 9-4935-601-14-3&P2. Screw the bushing into the resistor assembly.3 Form a bead of No. 3144 sealant around the fillet area of the bushing.4.

TM 9-4935-601-14-3&PSERVICE SAFETY SUMMARYFOR QUALIFIED SERVICE PERSONNEL ONLYRefer also to the preceding Operators Safety Summary.Do Not Service

TM 9-4935-601-14-3&P20. Install the ZERO REFERENCE control in the Front Panel (see Figs. 5-21 and 5-22)a. RESISTOR, VARIABLE MPL Item 2-27.This

TM 9-4935-601-14-3&PFigure 5-24. Application of sealant to RECORDtoggle-switch nut.Figure 5-26. Application of sealant to the GAIN orthe 0-dB SE

TM 9-4935-601-14-3&P3. Do not install Main Circuit Board holding screws at this point.24. Install cam switch Inserts (see Fig. 5-28)a. INSERT,

TM 9-4935-601-14-3&PFigure 5-30. Lubrication of POSITION control knob. Figure 5-31. Installation of knob on shaft..Figure 5-32. Lubrication of

TM 9-4935-601-14-3&PFigure 5-34. Lubrication of FOCUS and INTENSITYcontrol knobs.2. Install the knobs on the shafts of the FOCUS and INTENSITY c

TM 9-4935-601-14-3&PFigure 5-37. Detail of front panel jacks. Figure 5-38. Detail of X-Y Module thumbscrewsd. JACK, TIP: RED MPL Item 3-6.e.

TM 9-4935-601-14-3&P33. Attach Latch Assemblies (2 ea.) to the Front Cover (See Fig. 5-39)a. COVER, FRONT MPL Item 1-29.b. LATCH ASSY. MPL It

TM 9-4935-601-14.3&POPTIONSOption 04 Chart RecorderOption 05 Metric VersionOption 76 P7 PhosphorPOWER CORD OPTIONSOption A1: 220 V/16 A, Universal

TM 9-4935-601-14-3&PREPLACEABLEELECTRICAL PARTSPARTS ORDERING INFORMATIONReplacement parts are available from or through your local Tektronix, Inc

TM 9-4935-601-14-3&PCROSS INDEX-MFR. CODE NUMBER TO MANUFACTURERMfr. CodeManufacturer Address City, State, Zip0000M SONY/TEKTRONIX CORPORATION P O

TM 9-4935-601-14-3&P1792-011502 Time Domain Reflectometer.REV A FEB 1980vi

TM 9-4935-601-14-3&PTektronix Serial/Model No. MfrCkt No. Part No. Eff Dscont Name & Description Code Mfr Part NumberA1 670-4338-00 CKT BOARD

TM 9-4935-601-14-3&PTektronix Serial/Model No. MfrCkt No. Part No. Eff Dscont Name & Description Code Mfr Part NumberC1435 283-0003-00 CAP.,FX

TM 9-4935-601-14-3&PTektronix Serial/Model No. MfrCkt No. Part No. Eff Dscont Name & Description Code Mfr Part NumberQ1317 151-0302-00 TRANSIS

TM 9-4935-601-14-3&PTektronix Serial/Model No. MfrCkt No. Part No. Eff Dscont Name & Description Code Mfr Part NumberR1148 321-1210-01 RES.,FX

TM 9-4935-601-14-3&PTektronix Serial/Model No. MfrCkt No. Part No. Eff Dscont Name & Description Code Mfr Part NumberR1509 315-0510-00 RES.,FX

TM 9-4935-601-14-3&PTektronix Serial/Model No. MfrCkt No. Part No. Eff Dscont Name & Description Code Mfr Part NumberR1651 315-0472-00 RES.,FX

TM 9-4935-601-14-3&PTektronix Serial/Model No. MfrCkt No. Part No. Eff Dscont Name & Description Code Mfr Part NumberA2 6703009-00 B010100 B04

TM 9-4935-601-14-3&PTektronix Serial/Model No. MfrCkt No. Part No. Eff Dscont Name & Description Code Mfr Part NumberR2227 321-0614-00 RES.,FX

TM 9-4935-601-14-3&PTektronix Serial/Model No. MfrCkt No. Part No. Eff Dscont Name & Description Code Mfr Part NumberA3 670-3130-00 B010100 B0

TM 9-4935-601-14-3&PTektronix Serial/Model No. MfrCkt No. Part No. Eff Dscont Name & Description Code Mfr Part NumberR3149 315-0224-00 RES.,FX

TM 9-4935-601-14-3&PSECTION 0.GENERAL0-1. MAINTENANCE FORMS AND RECORDSDepartment of the Army forms and procedures used for equipment maintenance

A4 TM 9-4935-601-14-3&PTektronix Serial/Model No. MfrCkt No. Part No. Eff Dscont Name & Description Code Mfr Part NumberA4 670-3010-00 B010100

TM 9-4935-601-14-3&PTektronix Serial/Model No. MfrCkt No. Part No. Eff Dscont Name & Description Code Mfr Part NumberA5 6703513-00 B010100 B02

TM 9-4935-601-14-3&PTektronix Serial/Model No. MfrCkt No. Part No. Eff Dscont Name & Description Code Mfr Part NumberR5161 315-0104-00 RES.,FX

TM 9-4935-601-14-3&PTektronix Serial/Model No. MfrCkt No. Part No. Eff Dscont Name & Description Code Mfr Part NumberA6 670-3520-00 B010100 B0

TM 9-4935-601-14-3&PTektronix Serial/Model No. MfrCkt No. Part No. Eff Dscont Name & Description Code mfr Part NumberL6344 108-0598-00 COIL,RF

TM 9-4935-601-14-3&PTektronix Serial/Model No. MfrCkt No. Part No. Eff Dscont Name & Description Code mfr Part NumberR6451 315-0104-00 RES.,FX

TM 9-4935-601-14-3&PTektronix Serial/Model No. MfrCkt No. Part No. Eff Dscont Name & Description Code mfr Part NumberA7 670-3865-00 B010100 B1

TM 9-4935-601-14-3&PTektronix Serial/Model No. MfrCkt No. Part No. Eff Dscont Name & Description Code mfr Part NumberCHASSISBT0369 016-0595-00

TM 9-4935-601-14-3&PSECTION 8DIAGRAMS AND CIRCUIT BOARD ILLUSTRATIONSSymbolsGraphic symbols and class designation letters are based on ANSI Standa

TM 9-4935-601-14-3&PSECTION 9REPLACEABLEMECHANICAL PARTSPARTS ORDERING INFORMATIONReplacement parts are available from or through your local Tektr