Anritsu 373XXA User Manual

P/N: 10410-00185REVISION: DPRINTED: MARCH 2000COPYRIGHT 1996 ANRITSU CO.MODEL373XXAVECTOR NETWORK ANALYZERMAINTENANCE MANUAL490 JARVIS DRIVE l MORGAN

8-17 SIGNAL SOURCE MODULES ·················8-29Removal of Signal Source Module ················8-29A21A2 Source Control PCB ···················8-31A2

373XXA MM 7-5SYSTEM DESCRIPTION SYSTEM OVERVIEWA/DS/HS/HANALOGMUXS/HS/HS/HCTLEXTERNALKEYBOARDA/D BUSQUIET BUSVMEINTERFACETO ANALOG PCB'S(CTL &

7-6 373XXA MMSYSTEM OVERVIEW SYSTEM DESCRIPTIONP2 BIASP1D/AP2D/A80KHz÷20÷M÷10÷K1MHzD/A207-403MHz1MHz RES10 MHz2 BITSNCO10 MHzQB*QB*QB*QB*QB*QB*QB*QB*Q

7-3 ANALOG SUBSYSTEMASSEMBLIESThe following paragraphs briefly describe the major assemblies that com-prise the 373XXAAnalog Subsystem. Descriptions o

nals are then sent to the A21A1 YIG/Bias Controller PCB. This PCBconverts the analog signals to YIG main tuning coil current.The main tuning coil curr

Each output circuit path from the Transfer Switch contains a splitter.One path from each splitter goes to the associated directional coupler(Port 1/Po

Receiver Module The Receiver Module consists of the items listed below; refer to Fig-ure 7-2.qQuad Sampler/Buffer Amplifier with integrated SRD (step

A8, Source Lock/Signal Separationand Control PCBThe Source Lock Phase Comparator circuit on the A8 Source Lock/ SignalSeparation Control PCB compares

A7 PCB, LO3 The A7, Third Local Oscillator (LO3) Assembly, provides a fixed2.42 MHz Local Oscillator signal that is used on the A3, A4, and A6 PCBsto

7-4 DIGITAL SUBSYSTEMASSEMBLIESThe following paragraphs briefly describe the major assemblies that com-prise the 373XXADigital Subsystem. The digital

7-14 373XXA MMDIGITAL SUBSYSTEM ASSEMBLIES SYSTEM DESCRIPTIONBATTERYBACKEDRAM/CLOCKEPROM /FLASHSRAMMEMORYARRAY WITHBATTERYSCSICOPROCESSOR68040 PµETHER

Appendix C Connector Maintenance Check ProceduresC-1 INTRODUCTION ·························C-3C-2 PRECAUTIONS ·························C-3Pin Depth Pr

qSystem boot-up EPROM – This chip contains the boot-up instruc-tions used by the system CPU at power-up.A13 I/O Interface #1PCB AssemblyThis PCB assem

A15 Graphics Proces-sor PCB AssemblyThis PCB assembly contains circuitry that simultaneously drives both theinternal VGAmonitor and an external VGAmon

qFront panel castingNOTEThe front panel is an integrated assembly that is replace-able only as a single unit.Rear Panel Assembly The Rear Panel Assemb

Power Supply Module The Power Supply Module is a single self contained assembly mountedon the rear panel. This module provides:qUnregulated +5, +9, ±1

Internal VGA Monitor The internal monitor assembly is powered from a dedicated AC Linefrom the Power Supply Module. The degaussing and brightness con-

Table of Contents8-1 INTRODUCTION ·························8-38-2 EQUIPMENT REQUIRED ····················8-38-3 COVERS ······························8

8-17 SIGNAL SOURCE MODULES ·················8-29Removal of Signal Source Module ················8-29A21A2 Source Control PCB ···················8-31A2

Chapter 8Remove and ReplaceProcedures8-1 INTRODUCTION This chapter provides procedures for removing and replacing 373XXAfield exchangeable assemblies

8-3 COVERS Adjustment and troubleshooting operations require removal of the topcover. Replacement of some 373XXA assemblies and parts require re-moval

nPlace the 373XXA on its right side (monitor down).nIf not already done, remove the feet from the twoleft-side corners at the rear of the 373XXA.nRemo

8-4 A1–A9 AND A13–A16PCBSThis paragraph provides instructions for removing and replacing theA1– A9 and A13 – A16 PCB’s, which are located underneath t

REMOVE AND REPLACE A9 PCB BBRAM CHIP373XXA MM 8-7A9 PCB AssemblyPrinted Circuit BoardAssemblies, A1-A8PCB Assemblies A13-A16Figure 8-2. A1-A9 and A13-

Preliminary:Before removing and replacing the BBRAM Chip it is necessary tosave the following calibration data to the hard disk: signal source Fre-que

NOTEIf unable to recall calibrations from disk, you must redothe calibration data described in the Preliminary step onthe preceeding page.Step 3. Ensu

8-6 A9 PCB SRAM BATTERY This paragraph provides instructions for removing and replacing theSRAM Battery located on the A9 Main Processor PCB assembly.

nCheck the Service Log for any new errors. (Note that theservice log is non-volatile; it may contain error entriesfrom a previous problem or service o

8-7 A24 VME BUSTERMINATOR PCBThis paragraph provides instructions for removing and replacing theA24 VME Bus Terminator PCB assembly.Preliminary:qSwitc

Equipment Required:qOpen-end wrench, 1 in.Preliminary:qSwitch 373XXA power off. Remove the power cord.qRemove handle assembles and all covers (paragra

Step 6. Locate the cable from the front panel Power switch to con-nector J20 on the A17 Motherboard PCB. Disconnect atA17, J20 end.Step 7. Locate the

NOTEAll the the cables mentioned above have keyed connectors.Step 3. Remove the four screws that fasten the monitor assemblyto the chassis (see Figure

Table of Contents1-1 SCOPE OF MANUAL ·······················1-31-2 INTRODUCTION ·························1-31-3 IDENTIFICATION NUMBER ················

8-10 LIQUID CRYSTALDISPLAY (LCD)This paragraph provides instructions for removing and replacing theinternal LCD assembly.NOTEIt is not necessary to re

8-10A LCD BACKLIGHTLAMPThis paragraph provides instructions for the removal and replacementof the LCD Backlight Lamp, which is recommended at approxim

Preliminary:q Switch 373XXA power off. Remove the power cord.q Remove all covers (paragraph 8-3).NOTEAll the the cables mentioned in the following pro

To replace the Floppy Disk Drive assembly, perform the steps above inthe reverse order.8-12 REAR PANELASSEMBLYThis paragraph provides instructions for

Step 3. Remove the two screws located near top and middle of rearpanel (near fan-mounting screws). See Figure 8-10.Step 4. Locate cable from the rear-

work surface. Remove cables from cable harnesses, as re-quired.To replace the Rear Panel Assembly, perform the steps above in the re-verse order.8-13

Step 2. Remove the six screws from the rear panel that fasten it tothe left and right edges of the Power Supply Module (seeFigure 8-10). Gently separa

373XXA MM 8-23REMOVE AND REPLACE A18 REAR PANEL PCBW109A32J2BOTTOMTEST BREF BTESTAREF AREFP/O A31J3J4J2J1A34A35J4J3J2J1A33J3J2J1A32J11J9J10J8A31W135W1

8-24 373XXA MMA18 REAR PANEL PCB REMOVE AND REPLACEW86TEST BRE F BTEST ARE F AREFP/ O A31J3J4J2J1A34A35J4J3J2J1A33J3J2J1A3 2J1 1J9J1 0J8A3 16W8 1W144W

8-16 TEST SET MODULEASSEMBLIESThe following paragraphs provide instructions for removing and re-placing the RF/microwave components that comprise the

Figure 1-1. Series 373XXA Vector Network Analyzer System

To replace the Transfer Switch assembly, perform the steps above inthe reverse order. W111 for Models 37211B and 37217BInput Coupler(s)/ LowFreq Bridg

Buffer Amplifier/Sampler(A31)Use the following procedure to remove/replace the Buffer Amplifier/Sampler assemblies of all models.Preliminary:qRemove t

NOTEThe matching pin numbers are identified on the cable con-nectors and on the connector body.)Step 4. Repeat Step 3 for the TEST B and REF B cable c

Step 2. Disconnect the semi-rigid coaxial line W81 from the inputconnector of the SDM; see Figure 8-12.Step 3. Remove the two screws that fasten the S

Step 5. Disconnect the cables from connectors J1 and J2 of theA21A2 Source Control PCB. (Pull up gently to disconnect.)Note that the connector end of

A21A2 Source ControlPCBUse the following procedure to remove/replace the A21A2 Source Con-trol PCB assembly.Procedure:Step 1. Unfasten the two PCB ret

A21A1 Source YIGBias Control PCBUse the following procedure to remove/replace the A21A1 Source YIGBias Control PCB assembly.Procedure:Step 1. Disconne

Step 5. Remove the four screws that fastens the back plate of thesource module chassis to the heatsink of the A21A1 PCB.Step 6. Place the Signal Sourc

Step 2. Disconnect the semi-rigid coaxial lines from the RF INPUTconnector and RF OUTPUT connector of the Down Con-verter assembly.Step 3. Remove the

Table of ContentsA-1 INTRODUCTION ·························A-3A-2 DIAGNOSTICS MENUS ·····················A-3Start Self Test ··························

1-1 SCOPE OF MANUAL This manual provides general service and preventive maintenance in-formation for the ANRITSU 373XXA family of Vector NetworkAnalyz

Appendix ADiagnostics MenusA-1 INTRODUCTION This appendix contains descriptions and usage information for the373XXA Diagnostic Menus that are availabl

NOTEThe service log must always be printed out or saved todisk and sent to the factory along with a failed assembly.Due to the importance of the infor

CAUTIONAlways exit the troubleshooting mode via the DG4 menuselection FINISHED, RECOVER FROM TROUBLE-SHOOTING to insure proper system state recovery f

373XXA MM A-7/A-8SYSTEM DESCRIPTION DIAGNOSTICS MENUSHORIZONTALVERTICALPHASE LOCKSELECT MODEFOR OUTPUTPRESS <ENTER>TO SELECTMENU ORP2PRESS <E

Table of ContentsB-1 INTRODUCTION ·························B-3B-2 OPERATIONAL ERROR MESSAGES ··············B-3B-3 DISK RELATED ERROR MESSAGES·········

Appendix BError MessagesB-1 INTRODUCTION This appendix provides a listing of error messages that appear on the373XXA display or that are written to th

1-5 SYSTEM DESCRIPTION The 373XXAAnalyzers are microprocessor controlled Vector NetworkAnalyzers. Each is a single-instrument system that contains a b

rule will be an assembly error code between xx00 - xx09, where xx isthe assembly that is suspected of failing during normal operation. Forexample, err

APPENDIX B SERVICE LOG ERROR MESSAGES373XXA MM B-5Error Message Description Corrective ActionATTENUATOR UNAVAILABLE Option 6 Port 2 Test Step Attenuat

SERVICE LOG ERROR MESSAGES APPENDIX BB-6 373XXA MMError Message Description Corrective ActionSTANDARD CAL NOT VALID FORWAVEGUIDECannot use the standar

APPENDIX B SERVICE LOG ERROR MESSAGES373XXA MM B-7Error Message Description Corrective Action7140 GENERAL FLOPPY DRIVEFAILInvalid disk media or format

SERVICE LOG ERROR MESSAGES APPENDIX BB-8 373XXA MMError Message DescriptionThese errors are entered in the Service Log and output as part of the respo

APPENDIX B SERVICE LOG ERROR MESSAGES373XXA MM B-9Error Message DescriptionGET received during PM recep-tionGenerated when the GPIB Command ‘Group Exe

SERVICE LOG ERROR MESSAGES APPENDIX BB-10 373XXA MMError Message DescriptionInvalid cal term for calibrationtypeAn attempt was made to program a calib

APPENDIX B SERVICE LOG ERROR MESSAGES373XXA MM B-11Error Message DescriptionCurrent and cal frequencies dif-ferentThe flat power calibration setup doe

SERVICE LOG ERROR MESSAGES APPENDIX BB-12 373XXA MMError Message DescriptionBad filename The supplied filename was bad. The filename can have 8 charac

APPENDIX B SERVICE LOG ERROR MESSAGES373XXA MM B-13Error Message DescriptionFloppy disk write protected An attempt was made to write to a write protec

1-8 SERVICE STRATEGY This paragraph provides an overview of the 373XXAVNAservice strat-egy and available service facilities. It also provides referenc

SERVICE LOG ERROR MESSAGES APPENDIX BB-14 373XXA MMError Message DescriptionResponse after Indefinite Re-sponse discardedThis error is generated when

APPENDIX B SERVICE LOG ERROR MESSAGES373XXA MM B-15Error Message DescriptionUnable to store setup An unsuccessful attempt was made to save a front pan

SERVICE LOG ERROR MESSAGES APPENDIX BB-16 373XXA MM0000 INFORMATIONAL MESSAGE0000 SELF TEST INFO MESSAGE0094 PRNT INTERFACE TEST PASSED0095 PRNT INTER

APPENDIX B SERVICE LOG ERROR MESSAGES373XXA MM B-170914 SCSI DEVICE FAIL0915 MCCHIP FAIL0915 MCCHIP TIMER 1 FAIL0916 MCCHIP TIMER 2 FAIL0917 MCCHIP TI

SERVICE LOG ERROR MESSAGES APPENDIX BB-18 373XXA MM7146 FLOPPY DISK CHANGED7147 FLOPPY DISK UNAVAILABLE7169 FLOPPY INIT FAIL7170 GENERAL HARD DISK FAI

Table of ContentsC-1 INTRODUCTION ·························C-3C-2 PRECAUTIONS ·························C-3Pin Depth Problems ························C

Appendix CConnector MaintenanceCheck ProceduresC-1 INTRODUCTION This appendix provides general, precautionary information and in-structions pertaining

Pin-Depth Tolerance The center pin of a precision connector has a tolerances measured inmils (one mil = 1/1000 inch). The connectors of test devices m

hering to connector interfaces. When not in use, keep the connectorscovered.Visual Inspection Precision connectors should be inspected periodically. C

more than 30 pages of service messages and data. The 373XXA willautomatically remove the oldest errors first to make room for new er-rors, if necessar

Appendix DPerformance Specifications

Appendix DPerformance SpecificationsSYSTEM PERFORMANCEFrequency Range:RF Models:37317A 22.5 MHz to 8.6 GHzMicrowave Models37325A 40 MHz to 13.5 GHz373

Measurement Time vs. Span for 101 Data Points (typi-cal):Frequency Span Time (ms)40 MHz to 40 GHz 50020 GHz to 40 GHz 40010 GHz to 11 GHz 250TEST PORT

other five. Markers can be directed automatically to theminimum or maximum of a data trace.Enhanced Markers: Marker search for a level or band-width,

phase locking scheme allows it to operate as a tuned re-ceiver by locking all of its local oscillators to its internalcrystal reference oscillator. Se

LEVEL CONTROL RANGE(Without step attenuator)37317A 37325A 37347A 37369A 37397AAbove ResetPower*+10 dB +10 dB +10 dB +20 dB +20 dBBelow ResetPower-25 d

capacitance, load and short inductances, load impedance,and reflection standard offset lengths.Reference Impedance: Modify the reference impedanceof t

APPENDIX D PERFORMANCE SPECIFICATIONSThroughput Times (ms) without Correction (typical)Data Format 3 Points* 101 Points 401 Points 1601 Points32 Bit 2

D-10 373XXA MMPERFORMANCE SPECIFICATIONS APPENDIX Danalyzing the most critical compression frequencies of abroadband amplifier.HIGH SPEED TIME (DISTAN

Technical Support Technical service support is available by contacting any ANRITSUWorldwide Service Center (refer to paragraph 1-11). Or, service supp

Where kW is two times the number of window terms(for example, four for a two-term window)For a 40 GHz sweep range with 1601 data points, theunaliased

3670V50-1, DC to 65 GHz, V connectors, 1 foot long,male/female, two required.3670V50-2, DC to 65 GHz, V connectors, 2 feet long,male/female.FLEXIBLE T

373XXA MM D-13APPENDIX D PERFORMANCE SPECIFICATIONSDevice S21 (dB)Transmission Magnitude Uncertainty37x47A/B/3652/Transmission Only011-70 -60 -50 -40

D-14 373XXA MMPERFORMANCE SPECIFICATIONS APPENDIX DDevice S21 (dB)Transmission Magnitude Uncertainty37x69A/B/3652/Transmission Only101.1-70 -60 -50 -4

APPENDIX D PERFORMANCE SPECIFICATIONS373XXA MM D-15/D-16Device S21 (dB)Transmission Magnitude Uncertainty37x97A/B/3654B/Transmission Only101.1-70 -60

Appendix EPerformance VerificationSoftware User’s GuideThis appendix contains the Model 360X/37XXX Vector NetworkAnalyzer Performance VerificationSoft

SubjectIndex

Subject IndexNumber37397A Source Lock Signal PathDiagram ····················5-2637397A Test Signal Path Diagram ······5-25AA13 I/O Interface #1 PCB A

WARRANTYThe ANRITSU product(s) listed on the title page is (are) warranted against defects in materials andworkmanship for one year from the date of s

Verification Kits The ANRITSU Verification Kits listed below are used in conjunction withthe 37XXX Performance Verification Software (above). See Chap

EElectro-static discharge procedures ······1-9EQUIPMENT REQUIRED ···········8-3Error Code DE Lock Failure Troubleshooting 5-14Error Codes ············

PERFORMANCE SPECIFICATIONS ·····1-9Performance Verification Software ······1-4Peripheral Tests·················A-4PERIPHERALS AND INTERFACES · · 3-6 -

1-10 PERFORMANCESPECIFICATIONSThe performance specifications for all Series 373XXA models are con-tained in the Technical Data Sheets that are located

RECOMMENDED TEST EQUIPMENT GENERAL INFORMATION1-10 373XXA MMINSTRUMENTCRITICALSPECIFICATIONRECOMMENDEDMANUFACTURER/MODELUSE**Computer/Controller PC wi

GENERAL INFORMATION RECOMMENDED TEST EQUIPMENT373XXA MM 1-11INSTRUMENTCRITICALSPECIFICATIONRECOMMENDEDMANUFACTURER/MODELUSE**Assurance Air Line For mo

STATIC HANDLING GENERAL INFORMATION1-12 373XXA MM1.Do not touch exposed contacts onany static sensitive component.2.Do not slide static sensitive comp

Table of Contents2-1 INTRODUCTION ·························2-32-2 EXCHANGE ASSEMBLY PROGRAM ··············2-32-3 REPLACEABLE SUBASSEMBLIES AND PARTS ·

Chapter 2Replaceable Parts2-1 INTRODUCTION This chapter provides replaceable parts information for all 373XXAmodels. The major replaceable 373XXA asse

2-4 PARTS ORDERINGINFORMATIONAll parts listed in Tables 2-2 through 2- 8 may be ordered from your localANRITSU service center (Table 2-1). Or, they ma

REPLACEABLE PARTS PARTS ORDERING INFORMATION373XXA MM 2-5ReferenceDesignator373XXAOptionAssembly / Part Part NumberA1LO1D46866-3A1LO1D86866-4*A2LO2D50

Table of Contents, NarrativeChapter 1 — General Service InformationThis chapter provides a general description of Series373XXA Vector Network Analyzer

PARTS ORDERING INFORMATION REPLACEABLE PARTS2-6 373XXA MMAssembly / Part 373XXA Model / Option Part NumberTransfer SwitchAllD28580-146535*Step Attenua

REPLACEABLE PARTS PARTS ORDERING INFORMATION373XXA MM 2-7Assembly / Part 373XXA Model / Option Part Number10 MHz Ovenized OscillatorOpt 10 onlyND39476

PARTS ORDERING INFORMATION REPLACEABLE PARTS2-8 373XXA MMAssembly / Part 373XXA Model / Option Part NumberYIG Oscillator (2 - 20 GHz)AllC21620-1Down C

REPLACEABLE PARTS PARTS ORDERING INFORMATION373XXA MM 2-9Front Panel Assembly(Includes Front Panel PCB)VGA MonitorAssemblySignalSourceModulePowerSuppl

PARTS ORDERING INFORMATION REPLACEABLE PARTS2-10 373XXA MMPort 2Coupler/Bridge*Floppy Disk DriveAssemblyA17 MotherboardPCB AssemblyA24 VME BusTerminat

REPLACEABLE PARTS PARTS ORDERING INFORMATION373XXA MM 2-11Port 1 Bias TeePort 1 CouplerPort 2 Bias TeePort 2 CouplerPort 1 Step AttenuatorPort 1 MUX C

PARTS ORDERING INFORMATION REPLACEABLE PARTS2-12 373XXA MMFigure 2-4. Signal Source Parts Location Diagram

Table of Contents3-1 INTRODUCTION ·························3-33-2 CHECKING THE SERVICE LOG ················3-43-3 SELF TEST ··························

Chapter 3Operational Tests3-1 INTRODUCTION The tests in this section provide a means of fully testing the 373XXAVNAsystem for proper operation and sig

Appendix C — Connector Maintenance Check ProceduresThis appendix contains procedures and information needed to perform maintenance checks (includ-ing

3-2 CHECKING THESERVICE LOGChecking the service log consists of viewing the entries written into thelog.CAUTIONThe service log contains historical inf

3-3 SELF TEST The self test performs a series of tests that verify that various internal373XXAcircuits are functional and operating properly.To start

3-4 PERIPHERALS ANDINTERFACESThese tests are used to verify the operation of the liquid-crystal display(LCD), front panel keys, and peripheral devices

Front Panel Test This test verifies that the control keys in each of the 373XXA key groupsare functioning correctly.Procedure:Step 1. Press the Option

Equipment Required:Printer Test Fixture (ANRITSU PN: B39553)Procedure:Step 1. Press the Option Menu key (Enhancement key group) to dis-play the OPTION

GPIB Interface Test This test verifies that the 373XXA printer interface is functioning cor-rectly.Equipment Required:GPIB cable (ANRITSU PN: 2100-2),

3-5 SIGNAL PATH These are a series of automated tests designed to insure the 373XXAin-ternal signal paths are functioning properly and are capable of

Table of Contents4-1 INTRODUCTION ·························4-34-2 CALIBRATION AND MEASUREMENT CONDITIONS ····4-3Standard Conditions···················

4-2 373XXA MM

Chapter 4Performance Verification4-1 INTRODUCTION This chapter provides specific procedures to be used to verify that the373XXAis making accurate, tra

Table of Contents, DetailedChapter 1 General Information1-1 SCOPE OF MANUAL ·······················1-31-2 INTRODUCTION ·························1-31-3

Error Correction:Perform software-guided 12 term calibration.Special Precautions: When performing the procedures in this chapter, observe the followin

data, measurement uncertainties, and the impedance transfer stan-dards used.NOTEThe total verification uncertainty in these373XXA measurements include

ANRITSU Verification Kit appropriate for the 373XXA model; referto paragraph 4-3.GPIB cable (ANRITSU PN: 2100-2), or equivalentProcedure:Step 1. Using

perature, during warm-up, calibration, and when making measure-ments on your DUT.qThe use of proper microwave connector mating techniques.MeasurementT

Table of Contents5-1 INTRODUCTION ·························5-35-2 ASSOCIATED INFORMATION IN THIS MANUAL ······5-35-3 RECOMMENDED TEST EQUIPMENT ······

Many of the troubleshooting procedures presented in this chapter re-quire the removal of instrument covers to gain access to printed cir-cuit assembli

Chapter 5Troubleshooting5-1 INTRODUCTION This chapter provides specific procedures to be followed when trouble-shooting 373XXAVNAsystems. While perfor

qAppendix A, Diagnostics Menus, fully describes the 373XXA Di-agnostics menu tree, including the SERVICE LOG menu.qAppendix B, Error Codes and Message

Step 2. Remove bottom panel, and lay the system down on its left(monitor) side. Refer to Chapter 8, Remove and ReplaceProcedures.Step 3. Reconnect the

Chapter 2 Replaceable Parts2-1 INTRODUCTION ·························2-32-2 EXCHANGE ASSEMBLY PROGRAM ··············2-32-3 REPLACEABLE SUBASSEMBLIES A

Step 5. Connect the common lead of the oscilloscope to J13, pin 8.Measure the Power Supply Sync signal (PS_SYNC) on J13,pin 14:Specification: 2-4 vpp

Step 8. Using a DMM and/or an oscilloscope, measure the +5 voltpower supply at connector J13 on the Motherboard. Referto Figure 5-1 and Table 5-1, (pa

At this point, the system software continues the boot-up process byperforming the following activities:qIssues command to A15 PCB to change display fr

Step 2. Press the Utility Menu key (System State key group) to dis-play the UTILITY FUNCTIONS OPTIONS menu. Frommenu, select GENERAL DISK UTILITIES (s

Step 4. Retry boot-up. If fail, replace the Floppy Disk Drive.Screen DisplayProblemsIf the 373XXAsystem appears to have no screen display, perform the

System error codes in the range 0100 - 3999 identify the suspectedfailed subassembly in the two most-significant digits of the error code.For example:

the Source Module to achieve lock. Refer to Figure 5-2 for a flowchartthat troubleshoots the >40 GHz models (37397A).Example 1: Any of the followin

TROUBLESHOOTING SYSTEM HAS ERROR CODE373XXA MM 5-13Item DescriptionSWP Sweep direction:F = forward (S11, S21), R = reverse (S22, S12)PWR System source

SYSTEM HAS ERROR CODE TROUBLESHOOTING5-14 373XXA MMFails bothForward andReverse?Lock Failure DECode 6XXX)(ErrorFails below38 GHz?Fails above38 GHz?Fai

TROUBLESHOOTING SYSTEM HAS ERROR CODE373XXA MM 5-15Fails inForward only ?Fails below38 GHz?Fails above38 GHz?Fails above 38GHz?Normal power atPort 1 (

Chapter 5 Troubleshooting5-1 INTRODUCTION ·························5-35-2 ASSOCIATED INFORMATION IN THIS MANUAL ······5-35-3 RECOMMENDED TEST EQUIPMEN

SYSTEM HAS ERROR CODE TROUBLESHOOTING5-16 373XXA MMReverse FailsOnly?YesNoFails below38 GHz?Fails above38 GHz?Fails above38 GHz?Normal power atPort 2

5-7 SOURCE/TESTSET/RECEIVERBecause of the 373XXAphase-lock loop structure, it is not easy to distin-guish between failures that occur in the Source Mo

The letter “D” in the error code above indicates that the failure is pos-sibly in the Source Module. (Refer to Table 5-3.)Signal Source/TestSet Module

By examining these displays in conjunction with other failure symp-toms, the failed assembly can be located.Example: Suppose the Non-Ratio Parameter s

Step 3. Determine whether the failure occurs during forward mea-surements (S11, S21) and/or reverse measurements (S22,S12):If the problem occurs in bo

If it fails, contact ANRITSU Customer Service Center.Step 3. If the problem only occurs in Band 3, replace the SwitchedDoubler Module assembly and rep

Step 3. Perform the CRT Monitor Test again; if fail, contactANRITSU Customer Service Center.Front Panel TestFailures:If the Front Panel Test failed, t

qCondition of the 373XXA.qQuality and condition of the interface connections and connec-tors.qQuality and condition of the calibration components,thro

NOTEThe procedures for performing pin depth measurementsfor the connectors used on ANRITSU products are con-tained in Appendix C, Connector Maintenanc

373XXA MM 5-25TROUBLESHOOTING SIGNAL PATHSYIG OscillatorX4(SQM)ReverseSwitched FilterDownConverterAnalog to Digital ConverterA5 PCBSampler/Buffer AmpX

6-3 LO 2 CALIBRATION ·······················6-4Calibration Procedure ·······················6-4Post Calibration Actions······················6-56-4 FR

5-26 373XXA MMSIGNAL PATHS TROUBLESHOOTINGYIG OscillatorX4(SQM)ReverseSwitched FilterDownConverterA21A2 PCBSampler/Buffer AmpX2(SDM)3dBpadX4(SQM)Forwa

Contents6-1 INTRODUCTION ·························6-36-2 LO1 CALIBRATION························6-3Calibration Procedure ·······················6-3Pos

Chapter 6Adjustments6-1 INTRODUCTION This chapter contains procedures that are used to restore the calibrationof the 373XXAsignal source and the relat

If calibration passes:Save the calibration data to (hard) disk, as follows:Step 1. Press the Option Menu key (Enhancement key group) to dis-play the O

Step 2.Select DIAGNOSTICS from menu.Then select in se-quence: H/W CALIBRATIONS then LO2 CALIBRA-TION.Step 3. Follow the directions displayed on the 37

nYIG OscillatornSwitched FilterqBBRAM chip on the A9 Processor PCB is replaced and theSource Calibration Data was not previously saved on disk (thusda

Step 3. Follow the directions displayed on the screen to set-up andconnect the frequency counter to the 373XXA. Refer also toFigure 6-1 Select START S

If calibration fails:qVerify the GPIB cable is connected to the Dedicated GPIB (bot-tom) connector on the 373XXA rear panel.qVerify that the frequency

CalibrationProcedurePerform the following steps:Equipment RequiredRefer to Table 1-1, located on page 1-9, for further information aboutthe following

7-5 MAIN CHASSIS ASSEMBLIES·················7-16A17 System Motherboard Assembly···············7-16Front Panel Assembly ······················7-16Rear

quence: H/W CALIBRATIONS, and then SOURCE ALCCALIBRATION (below).Step 3. Follow the directions displayed on the screen to set-up andconnect the power

If calibration passes:Save the calibration data to (hard) disk, as follows:Step 1. Press the Option Menu key (Enhancement key group) to dis-play the O

Equipment RequiredNoneNOTEAllow the 373XXA to warm-up at least 30 minutes prior toperforming calibration, and perform the ALC calibration(paragraph 6-

6-7 A8 ADJUSTMENT(37397A)The adjustments are important to the operation of the VNA above 56GHz. Improperly adjusted A8 Potentiometers may cause lock f

NOTEAlso save the calibration data to floppy diskfor archival purposes as a backup in case ofa hard disk failure. Label the disk with cali-bration typ

ProcedureStep 1. With power off and the new part installed, disconnect theRF cable from J4 of the Switched Filter.Step 2. Install Power Sensor (usea6o

Table of Contents7-1 INTRODUCTION ·························7-37-2 SYSTEM OVERVIEW ·······················7-37-3 ANALOG SUBSYSTEM ASSEMBLIES ··········

Chapter 7System Description7-1 INTRODUCTION This chapter provides a brief overview of the functional assembliesand major parts that comprise a typical

An internal service log stores a record of system failures, data aboutthe failures, and other key system service information. The service logis implem