Anritsu 371 C Series User manual

MODEL
371XXC
VECTOR NETWORK ANALYZER
MAINTENANCE MANUAL
P/N: 10410-00236
REVISION: B
PRINTED: SEPTEMBER 2002
COPYRIGHT: 2002 ANRITSU CO.
490 JARVIS DRIVE lMORGAN HILL, CA 95037-2809

WARRANTY
The ANRITSU product(s) listed on the title page is (are) warranted against defects in materials and
workmanship for three years from the date of shipment.
ANRITSU’s obligation covers repairing or replacing products which prove to be defective during the
warranty period. Buyers shall prepay transportation charges for equipment returned to ANRITSU
for warranty repairs. Obligation is limited to the original purchaser. ANRITSU is not liable for con-
sequential damages.
LIMITATION OF WARRANTY
The foregoing warranty does not apply to ANRITSU connectors that have failed due to normal wear.
Also, the warranty does not apply to defects resulting from improper or inadequate maintenance by
the Buyer, unauthorized modification or misuse, or operation outside of the environmental specifi-
cations of the product. No other warranty is expressed or implied, and the remedies provided herein
are the Buyer’s sole and exclusive remedies.
TRADEMARK ACKNOWLEDGEMENTS
V Connector and K Connector are registered trademarks of ANRITSU Company.
Ink Jet and Think Jet are registered trademarks of Hewlett-Packard Co.
MS-DOS and Windows are a registered trademarks of Microsoft Corporation.
Acrobat is a registered trademark of Adobe Corporation
NOTICE
ANRITSU Company has prepared this manual for use by ANRITSU Company personnel and cus-
tomers as a guide for the proper installation, operation and maintenance of ANRITSU Company
equipment and computer programs. The drawings, specifications, and information contained herein
are the property of ANRITSU Company, and any unauthorized use or disclosure of these drawings,
specifications, and information is prohibited; they shall not be reproduced, copied, or used in whole
or in part as the basis for manufacture or sale of the equipment or software programs without the
prior written consent of WILTRON Company.

Table of Contents
Chapter 1 — General Service Information
This chapter provides a general description of Series 371XXC Vector Network Analyzer systems, sys-
tem serial numbers, and frequency ranges. It explains the level of maintenance covered in this man-
ual and the service strategy used throughout this manual. It also contains static-sensitive component
handling precautions and a list of recommended test equipment.
Chapter 2 — Replaceable Parts
This chapter lists all replaceable subassemblies and components for all 371XXC models. It explains
the ANRITSU exchange assembly program and provides parts ordering information.
Chapter 3 — Operational Tests
This chapter contains procedures that provide a means of fully testing the 371XXC VNA system for
proper operation and signal stability. These tests are intended to be used as a periodic check of the
operational functionality of the 371XXC.
Chapter 4 — Performance Verification Procedures
This chapter provides detailed procedures for verifying that the performance of the 371XXC meets
minimum performance standards.
Chapter 5 — Troubleshooting
This chapter provides information for troubleshooting Series 371XXC Vector Network Analyzer sys-
tems. The troubleshooting procedures contained in this chapter support fault isolation down to a re-
placeable subassembly.
Chapter 6 — Adjustments
This chapter provides adjustment procedures for all models of Series 371XXC Vector Network Ana-
lyzer systems. These procedures are used after replacement or repair of one or more critical subas-
semblies, or as indicated by the Performance Verification Procedures contained in Chapter 4.
Chapter 7 — System Description
This chapter provides descriptions of the functional operation of the major assemblies contained in
Series 371XXC Vector Network Analyzer systems. The operation of all major circuit blocks is de-
scribed so that the reader may better understand the function of each assembly as part of the overall
operation.
Chapter 8 — Removal and Replacement Procedures
This chapter describes how to gain access to all of the major assemblies and major parts for
troubleshooting and/or replacement.
Appendix A — Diagnostic Menus
This appendix contains descriptions and usage information for the Diagnostic Menus that are avail-
able via the front panel Option Menu key.
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Appendix B — Error Codes/Messages
This appendix contains a listing of the Error Codes/Messages. Also included is a description of the in-
formation fields that are part of the error messages.
Appendix C — Connector Maintenance Check Procedures
This appendix contains procedures and information needed to perform maintenance checks (includ-
ing pin-depth measurements) for the connectors on all ANRITSU supplied Calibration/Verification
Kit components, Through-cables, and other associated RF/microwave components.
Appendix D — Performance Specifications
Appendix E — Millimeter Wave Instructions
This appendix provides service instructions for the 371XXC Millimeter Wave System. The informa-
tion is specific to the 371XXC and is intended to supplement the common service instructions con-
tained in the other parts of this manual.
Appendix F — SM5235 and SM5392 Instructions
This appendix contains operation, specification, and adjustment information for the SM5235 and
SM5392 S-Parameter test sets.
Index
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Table of Contents
Chapter 1 General Information
1-1 SCOPE OF MANUAL ·······················1-3
1-2 INTRODUCTION ·························1-3
1-3 ONLINE MANUALS ·······················1-3
1-4 IDENTIFICATION NUMBER ··················1-3
1-5 SYSTEM DESCRIPTION ·····················1-4
1-6 RELATED MANUALS·······················1-4
1-7 OPTIONS ·····························1-4
1-8 SERVICE STRATEGY·······················1-4
Functional Assembly Level Troubleshooting ·········1-5
Internal Hardware Adjustments and Calibrations ······1-5
Internal Service Log ······················1-5
System Test/ Certification ···················1-5
Preventive Service ·······················1-6
Servicing Specially Modified Instruments ··········1-6
1-9 SERVICE SUPPORT INFORMATION ··············1-6
Technical Support ·······················1-6
Service Software ························1-7
Test Fixtures/ Aids ·······················1-7
Failed Assembly Exchange Program ·············1-7
1-10 RECOMMENDED TEST EQUIPMENT ·············1-8
1-11 STATIC SENSITIVE COMPONENT
HANDLING PROCEDURES ···················1-9
1-12 SERVICE CENTERS ·······················1-9
1-13 PERFORMANCE SPECIFICATIONS ··············1-9
Chapter 2 Replaceable Parts
2-1 INTRODUCTION ·························2-3
2-2 EXCHANGE ASSEMBLY PROGRAM ··············2-3
2-3 REPLACEABLE SUBASSEMBLIES AND PARTS ·······2-3
2-4 PARTS ORDERING INFORMATION ··············2-4
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Chapter 3 Operational Tests
3-1 INTRODUCTION ·························3-3
3-2 CHECKING THE SERVICE LOG ················3-4
3-3 SELF TEST ····························3-5
3-4 PERIPHERALS AND INTERFACES TESTS ··········3-6
Display Test···························3-6
Front Panel Test ························3-7
External Keyboard Interface Test ···············3-7
Printer Interface Test ·····················3-7
GPIB Interface Test ······················3-9
Chapter 4 Performance Verification
4-1 INTRODUCTION ·························4-3
4-2 CALIBRATION AND MEASUREMENT CONDITIONS ····4-3
Standard Conditions ······················4-3
Special Precautions·······················4-4
4-3 PERFORMANCE VERIFICATION PROCEDURE ·······4-4
Noise Floor/Receiver Dynamic Range Test ··········4-5
Compression Test for 37147C, 37169C ············4-9
Chapter 5 Troubleshooting
5-1 INTRODUCTION ·························5-3
5-2 ASSOCIATED INFORMATION IN THIS MANUAL ······5-4
5-3 RECOMMENDED TEST EQUIPMENT ·············5-4
5-4 IF SYSTEM DOES NOT POWER-UP ··············5-4
Line Source and Interface Checks···············5-4
Power Supply Voltages Check ·················5-4
Power Supply Module Check··················5-6
5-5 IF SYSTEM DOES NOT BOOT-UP················5-7
Boot-up Process Sequence ···················5-7
Troubleshooting Boot-up Problems ··············5-8
Hard Disk Problem 1 ·····················5-8
Hard Disk Problem 2······················5-9
Floppy Disk Problems ·····················5-9
Screen Display Problems····················5-9
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5-6 IF SYSTEM PRODUCES AN ERROR CODE··········5-10
Phase Lock Error Codes (6000 Series) ············5-11
Service Log Snap Shot Data ·················5-13
5-7 SIGNAL SOURCE, TEST SET, AND RECEIVER PROBLEMS 5-13
Signal Source Phase Lock Loop Assemblies ·········5-14
Signal Source/Test Set Module Error Codes ·········5-14
Isolation Procedures ·····················5-16
5-8 IF A PERIPHERALS/ INTERFACE TEST FAILED ······5-18
LCD Display Test Failures:··················5-18
Front Panel Test Failures: ··················5-18
External Keyboard Interface Test Failures: ·········5-18
Printer Interface Test Failures: ···············5-19
GPIB Interface Test Failures: ················5-19
5-9 IF MEASUREMENTS ARE IN QUESTION ··········5-19
Measurement Conditions Check List ············5-19
Chapter 6 Adjustments
6-1 INTRODUCTION ·························6-3
6-2 LO1 CALIBRATION························6-3
Calibration Procedure ·····················6-3
Post Calibration Actions ····················6-4
6-3 LO 2 CALIBRATION ·······················6-4
Calibration Procedure ·····················6-4
Post Calibration Actions ····················6-5
6-4 FREQUENCY CALIBRATION ··················6-5
Calibration Procedure ·····················6-6
Post Calibration Actions ····················6-7
6-5 RF POWER/ALC CALIBRATION·················6-8
Calibration Procedure ·····················6-8
Post Calibration Actions ···················6-10
6-6 SOURCE LOCK THRESHOLD CALIBRATION ········6-11
Chapter 7 System Description
7-1 INTRODUCTION ·························7-3
7-2 SYSTEM OVERVIEW ·······················7-3
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7-3 ANALOG SUBSYSTEM ASSEMBLIES ·············7-7
Signal Source Module ·····················7-7
Test Set Module·························7-8
Receiver Module ························7-9
A8, Source Lock/ Signal Separation and Control PCB · · · 7-10
IF Section ···························7-10
A7PCB,LO3·························7-10
A5 A/D Converter PCB ····················7-11
7-4 DIGITAL SUBSYSTEM ASSEMBLIES·············7-12
A9 Main Processor PCB Assembly ··············7-12
A7 PCB, 10 MHz Time Base················7-13
A13 I/O Interface #1 PCB Assembly ·············7-15
A14 I/O Interface #2 PCB Assembly ·············7-15
A15 Graphics Processor PCB Assembly ···········7-16
A16 Hard Disk PCB Assembly ················7-16
Floppy Disk Drive Assembly ·················7-16
A24 VME Bus Terminator PCB ···············7-16
7-5 MAIN CHASSIS ASSEMBLIES·················7-16
A17 System Motherboard Assembly ·············7-16
Front Panel Assembly ····················7-16
Rear Panel Assembly ·····················7-17
A18 Rear Panel Interface PCB ················7-17
Power Supply Module·····················7-18
Internal LCD ·························7-18
Chapter 8 Remove and Replace Procedures
8-1 INTRODUCTION ·························8-3
8-2 EQUIPMENT REQUIRED ····················8-3
8-3 REMOVE / REPLACE 371XXC COVERS ············8-4
8-4 REMOVE / REPLACE THE A1–A9 AND A13–A16 PCBS····8-6
A1 – A9 PCBs··························8-6
A13 – A16 PCBs ························8-6
8-5 REMOVE / REPLACE A9 PCB BBRAM CHIP ·········8-8
8-6 REMOVE / REPLACE A9 PCB SRAM BATTERY ·······8-10
8-7 REMOVE / REPLACE A24 VME BUS TERMINATOR PCB· · 8-12
8-8 REMOVE / REPLACE FRONT PANEL ASSEMBLY ·····8-13
8-9 LIQUID CRYSTAL DISPLAY (LCD) ··············8-15
8-10 REMOVE / REPLACE FLOPPY DISK DRIVE ·········8-16
8-11 REMOVE / REPLACE REAR PANEL ASSEMBLY·······8-18
8-12 REMOVE / REPLACE FAN ASSEMBLY ············8-19
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8-13 REMOVE / REPLACE POWER SUPPLY MODULE ······8-20
8-14 REMOVE / REPLACE A18 REAR PANEL PCB ········8-21
8-15 REMOVE / REPLACE TEST SET MODULE ASSEMBLIES · 8-22
Buffer Amplifier/ Sampler(A31) ···············8-25
Switched Doubler Module Assembly ·············8-26
8-16 REMOVE / REPLACE SIGNAL SOURCE MODULE ASSEMBLIES
8-27
Removal of Signal Source Module ··············8-27
A21A2 Source Control PCB··················8-29
A21A1 Source YIG Bias Control PCB ············8-29
Switched Filter Assembly···················8-30
Down Converter Assembly ··················8-31
YIG Oscillator Assembly ···················8-31
Appendix A Diagnostics Menus
A-1 INTRODUCTION ·························A-3
A-2 DIAGNOSTICS MENUS ·····················A-3
Start Self Test ·························A-3
Read Service Log························A-3
Installed Options························A-4
Peripheral Tests ························A-4
Troubleshooting ························A-4
H/W Calibrations························A-4
Appendix B Error Messages
B-1 INTRODUCTION ·························B-3
B-2 OPERATIONAL ERROR MESSAGES ··············B-3
B-3 DISK RELATED ERROR MESSAGES··············B-3
B-4 GPIB RELATED ERROR MESSAGES··············B-3
B-5 SERVICE LOG ERROR MESSAGES ··············B-3
0000 - 0099 ···························B-3
0100 - 3999 ···························B-3
4000 - 4999 ···························B-4
5000 - 5999 ···························B-4
6000 - 6999 ···························B-4
7000 - 7999 ···························B-4
8000 - 8999 ···························B-4
371XXC MM vii

Appendix C Connector Maintenance Check Procedures
C-1 INTRODUCTION ·························C-3
C-2 PRECAUTIONS ·························C-3
Pin Depth Problems ······················C-3
Pin-Depth Tolerance ······················C-4
Avoid Over Torquing Connectors ···············C-4
Teflon Tuning Washers ····················C-4
Avoid Mechanical Shock ···················C-4
Keep Connectors Clean ····················C-4
Visual Inspection························C-5
C-3 REPAIR/ MAINTENANCE ···················C-5
Appendix D Performance Specifications
Appendix E Millimeter Wave Service Instructions
E-1 INTRODUCTION ·························E-3
E-2 DESCRIPTION ··························E-3
E-3 REPLACEABLE PARTS ·····················E-4
E-4 PERFORMANCE VERIFICATION–GENERAL ·········E-4
Required Equipment······················E-4
Initial System Setup ······················E-4
E-5 PERFORMANCE VERIFICATION–
IF POWER LEVEL TEST·····················E-6
Test Setup ···························E-6
Test Procedure ·························E-7
E-6 PERFORMANCE VERIFICATION–
HIGH LEVEL NOISE TEST, TRANSMISSION ·········E-8
Test Setup ···························E-8
Test Procedure ························E-10
E-7 PERFORMANCE VERIFICATION–
HIGH LEVEL NOISE TEST, REFLECTION··········E-10
Test Setup ···························E-11
Test Procedure ························E-12
E-8 PERFORMANCE VERIFICATION–
SYSTEM DYNAMIC RANGE TEST ··············E-12
Calibration ··························E-12
Test Procedure ························E-14
viii 371XXC MM