Anritsu 37 D Series User manual

P/N: 10410-00264
REVISION: C
PRINTED: JULY 2007
COPYRIGHT 2007 ANRITSU CO.
SERIES
37XXXD
VECTOR NETWORK ANALYZER
MAINTENANCE MANUAL
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 consequen-
tial 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 specifica-
tions 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.
MS-DOS is a registered trademark of Microsoft Corporation.
Acrobat and Acrobat Reader are registered trademarks of Adobe Systems Incorporated.
NOTICE
Anritsu Company has prepared this manual for use by Anritsu Company personnel and customers 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 in-
formation is prohibited; they shall not be reproduced, copied, or used in whole or in part as the basis
for manufacture or sale of equipment or software programs without the prior written consent of
Anritsu Company. UPDATES
Updates to this manual, if any, may be downloaded from the Anritsu Internet site at:
http://www.us.anritsu.com

Table of Contents, Narrative
Chapter 1—General Service Information
This chapter provides a general description of Series 37XXXD Vector Network Analyzer systems, sys-
tem serial numbers, and frequency ranges. It explains the level of maintenance covered in this manual
and the service strategy used throughout this manual. It also contains static-sensitive component han-
dling precautions and a list of recommended test equipment.
Chapter 2—Replaceable Parts
Thischapterlistsall replaceable subassembliesandcomponentsfor all 37XXXDmodels.Itexplains the
Anritsu exchange assembly program and provides parts ordering information.
Chapter 3—Theory of Operation
This chapter provides descriptions of the functional operation of the major assemblies contained in Se-
ries37XXXD Vector NetworkAnalyzer systems.The operation ofall majorcircuit blocks is described so
thatthereadermaybetterunderstandthefunctionofeachassemblyaspartoftheoveralloperation.
Chapter 4—Operational Performance Tests
This chapter contains procedures that provide a means of fully testing the 37XXXD VNA system for
properoperationandsignal stability. These testsareintendedto be used asaperiodiccheck of the oper-
ational functionality of the 37XXXD.
Chapter 5—System Performance Verification
Thischapterprovides a detailedprocedurefor verifying thatthe37XXXD is capableof making accurate
S-parameter measurements.
Chapter 6—Adjustments
This chapter provides adjustment procedures for all models of Series 37XXXD Vector Network Ana-
lyzer systems. These procedures are used after replacement or repair of one or more critical subassem-
blies, or as indicated by the operational performance tests contained in Chapter 4.
Chapter 7—Troubleshooting
This chapter provides information for troubleshooting Series 37XXXD Vector Network Analyzer sys-
tems. The troubleshooting procedures contained in this chapter support fault isolation down to a re-
placeable subassembly.
Chapter 8—Removal and Replacement Procedures
This chapter describes how to gain access to all of the major assemblies and major parts for trouble-
shooting and/or replacement.
37XXXD MM i

Appendix A—Error Messages
Thisappendixcontainsa listing oftheErrorCodes/Messages. Also includedisadescription of theinfor-
mation fields that are part of the error messages.
Appendix B—Connector Care and Handling
This appendix contains procedures and information needed to perform maintenance checks (including
pin-depth measurements) for the connectors on all Anritsu supplied Calibration/Verification Kit com-
ponents, Through-cables, and other associated RF/microwave components.
Appendix C—Lightning 37000D Technical Data Sheet
This appendix contains a copy of the 37000D Series Vector Network Analyzers, Technical Data Sheet,
Anritsupartnumber11410-00350.Thisdatasheetprovidesperformancespecificationsforallmodelsin
the series.
Appendix D—ME7808B/C Broadband Measurement System Maintenance
This appendix provides maintenance and verification instructions for the ME7808B/C Broadband
Measurement System. This maintenance and verification is performed independently of any
wafer-probe station.
Subject Index
ii 37XXXD MM
Table of Contents, Narrative (Continued)

Table of Contents
Chapter 1 General Information
1-1 SCOPE OF MANUAL ·································1-3
1-2 INTRODUCTION ···································1-3
1-3 IDENTIFICATION NUMBER·····························1-3
1-4 ONLINE MANUAL ··································1-3
1-5 SYSTEM DESCRIPTION ·······························1-4
1-6 RELATED MANUALS·································1-4
1-7 STANDARD OPTIONS ································1-5
1-8 SERVICE STRATEGY·································1-5
Functional Assembly Level Troubleshooting...................1-5
Internal Hardware Adjustments and Calibrations................1-6
Internal Service Log................................1-6
System Test/Certification .............................1-7
Servicing Specially Modified Instruments ....................1-7
1-9 SERVICE SUPPORT ·································1-7
Technical Support .................................1-7
Service Software ..................................1-8
Verification Kits ..................................1-9
Failed Assembly Exchange Program .......................1-9
1-10 PERFORMANCE SPECIFICATIONS························1-10
1-11 SERVICE CENTERS·································1-10
1-12 STATIC SENSITIVE COMPONENT HANDLING PROCEDURES ········1-10
1-13 RECOMMENDED TEST EQUIPMENT ······················1-12
Chapter 2 Replaceable Parts
2-1 INTRODUCTION ···································2-3
2-2 EXCHANGE ASSEMBLY PROGRAM ························2-3
2-3 REPLACEABLE SUBASSEMBLIES AND PARTS ·················2-4
2-4 PARTS ORDERING INFORMATION ························2-4
37XXXD MM iii

Chapter 3 Theory of Operation
3-1 INTRODUCTION ···································3-3
3-2 SYSTEM OVERVIEW ·································3-3
3-3 ANALOG SUBSYSTEM ASSEMBLIES·······················3-10
Signal Source Module ..............................3-10
Test Set Module, 20 GHz and 40 GHz Instruments ..............3-11
Test Set Module, 50 GHz and 65 GHz Instruments ..............3-13
A7 PCB 10 MHz Timebase............................3-15
Receiver Module .................................3-16
A8, Source Lock/Signal Separation and Control PCB .............3-18
IF Section.....................................3-18
A7PCB,LO3...................................3-19
A5 A/D Converter PCB..............................3-19
3-4 DIGITAL SUBSYSTEM ASSEMBLIES·······················3-20
A9 Main Processor PCB Assembly .......................3-20
A13 I/O Interface #1 PCB Assembly.......................3-21
A14 I/O Interface #2 PCB Assembly.......................3-21
A15 Graphics Processor PCB Assembly.....................3-22
A16 Hard Disk PCB Assembly..........................3-22
Floppy Disk Drive Assembly...........................3-22
A24 VME Bus Terminator PCB .........................3-22
3-5 MAIN CHASSIS ASSEMBLIES ···························3-22
A17 System Motherboard Assembly.......................3-22
Front Panel Assembly ..............................3-23
A18 Rear Panel Interface PCB..........................3-23
Power Supply Module ..............................3-24
Chapter 4 Operational Performance Tests
4-1 INTRODUCTION ···································4-3
4-2 CHECKING THE SERVICE LOG ··························4-4
4-3 SELF TEST ······································4-5
4-4 PERFORMANCE TESTS ·······························4-6
Test Specifications .................................4-6
Required Equipment................................4-7
Additional Required Equipment .........................4-7
Installation and Launching the Test Program ..................4-7
Running the Tests .................................4-9
Description of Tests ................................4-9
iv 37XXXD MM
Table of Contents (Continued)

4-5 LOG MAGNITUDE DYNAMIC ACCURACY TEST ················4-15
Required Equipment ...............................4-15
Test Procedure ..................................4-16
Analysis of the Measurement ..........................4-18
Chapter 5 System Performance Verification
5-1 INTRODUCTION ···································5-3
5-2 CALIBRATION AND MEASUREMENT CONDITIONS ··············5-3
Standard Conditions................................5-3
Special Precautions ................................5-4
5-3 MEASUREMENT ACCURACY ····························5-4
Verification Software ...............................5-4
Verification Result Determination ........................5-5
5-4 VERIFICATION PROCEDURE····························5-6
5-5 VNA TRACEABILITY ·································5-7
Chapter 6 Adjustments
6-1 INTRODUCTION ···································6-3
6-2 LO1 CALIBRATION··································6-3
6-3 LO2 CALIBRATION··································6-5
6-4 FREQUENCY CALIBRATION ····························6-7
6-5 RF POWER/ALC CALIBRATION ··························6-10
6-6 SOURCE LOCK THRESHOLD ···························6-14
Chapter 7 Troubleshooting
7-1 INTRODUCTION ···································7-3
7-2 POWER-UP PROBLEMS ·······························7-3
7-3 HARD/FLOPPY DISK AND DISPLAY PROBLEMS·················7-5
Failure to Boot-up from the Hard Disk ......................7-5
Floppy Disk Drive Problems ...........................7-5
Display Problems .................................7-5
7-4 OTHER BOOT-UP PROBLEMS ···························7-6
7-5 UNDERSTANDING THE SERVICE LOG ······················7-7
7-6 DIAGNOSTIC DISPLAYS·······························7-8
37XXXD MM v
Table of Contents (Continued)

7-7 ERROR MESSAGES DURING MEASUREMENTS ·················7-9
Lock Failure D or DE (60xx) ...........................7-9
Other Lock Failures ................................7-9
7-8 MEASUREMENT ACCURACY PROBLEMS ····················7-11
All Data on All Channels is Greatly Inaccurate ................7-11
Excessive Ripple in the Display of Low-Loss Devices..............7-11
Insufficient System Dynamic Range ......................7-11
7-9 NON-RESPONSE OR OTHER UNUSUAL BEHAVIOR ··············7-11
Chapter 8 Removal and Replacement Procedures
8-1 INTRODUCTION ···································8-3
8-2 EQUIPMENT REQUIRED ······························8-3
8-3 COVERS ········································8-4
8-4 A1 TO A16 PCBS ···································8-6
A1 to A16 PCBs ..................................8-6
8-5 A24 VME BUS TERMINATOR PCB ·························8-8
8-6 FRONT PANEL ASSEMBLY ·····························8-9
8-7 LIQUID CRYSTAL DISPLAY (LCD) ························8-12
8-8 FLOPPY DISK DRIVE ································8-12
8-9 REAR PANEL ASSEMBLY ·····························8-13
8-10 FAN ASSEMBLY ···································8-15
8-11 POWER SUPPLY MODULE·····························8-16
8-12 A18 REAR PANEL PCB ·······························8-17
8-13 TEST SET MODULE ASSEMBLIES ························8-18
8-14 SIGNAL SOURCE MODULES ···························8-21
Removal of Signal Source Module ........................8-21
A21A2 Source Control PCB ...........................8-24
A21A1 Source YIG Bias Control PCB ......................8-24
Switched Filter Assembly ............................8-25
Down Converter Assembly............................8-25
YIG Oscillator Assembly.............................8-26
vi 37XXXD MM
Table of Contents (Continued)

Appendix A Connector Care and Handling
A-1 INTRODUCTION ···································A-3
A-2 PRECAUTIONS ····································A-3
Pin Depth Problems................................A-3
Pin-Depth Tolerance ...............................A-4
Avoid Over Torquing Connectors ........................A-5
Teflon Tuning Washers ..............................A-5
Avoid Mechanical Shock .............................A-5
Keep Connectors Clean ..............................A-5
Visual Inspection .................................A-5
A-3 REPAIR/MAINTENANCE ······························A-5
Appendix B Lightning 37000D Technical Data Sheet
Appendix C ME7808B/C Technical
Data Sheet
Appendix D ME7808B/C Broadband Measurement System Maintenance
D-1 INTRODUCTION ···································D-3
D-2 MG369XX SYNTHESIZER OPTIONS ························D-3
D-3 SYSTEM DESCRIPTION·······························D-3
D-4 SYSTEM ADJUSTMENTS ······························D-5
D-5 REPLACEABLE ITEMS ·······························D-5
D-6 PERFORMANCE AND OPERATIONAL TESTS ··················D-7
D-7 MULTIPLEXING COUPLER CHECK ·······················D-21
D-8 TROUBLESHOOTING ·······························D-23
Subject Index
37XXXD MM vii/viii
Table of Contents (Continued)

Table of Contents
1-1 SCOPE OF MANUAL ·································1-3
1-2 INTRODUCTION ···································1-3
1-3 IDENTIFICATION NUMBER·····························1-3
1-4 ONLINE MANUAL ··································1-3
1-5 SYSTEM DESCRIPTION ·······························1-4
1-6 RELATED MANUALS·································1-4
1-7 STANDARD OPTIONS ································1-5
1-8 SERVICE STRATEGY·································1-5
Functional Assembly Level Troubleshooting...................1-5
Internal Hardware Adjustments and Calibrations................1-6
Internal Service Log................................1-6
System Test/Certification .............................1-7
Servicing Specially Modified Instruments ....................1-7
1-9 SERVICE SUPPORT ·································1-7
Technical Support .................................1-7
Field Service Kits .................................1-8
Service Software ..................................1-8
Verification Kits ..................................1-9
Failed Assembly Exchange Program .......................1-9
1-10 PERFORMANCE SPECIFICATIONS························1-10
1-11 SERVICE CENTERS·································1-10
1-12 STATIC SENSITIVE COMPONENT HANDLING PROCEDURES ········1-10
1-13 RECOMMENDED TEST EQUIPMENT ······················1-12
Chapter 1
General Information

1-2 37XXXD MM
Figure 1-1. Series 37XXXD Vector Network Analyzer System

Chapter 1
General Information
1-1 SCOPE OF MANUAL This manual provides general service and preventive maintenance in-
formation for the Anritsu 37XXXD models of Vector Network Analyzer
(VNA) systems. It contains procedures for:
qTesting the instrument for proper operation.
qVerifying measurement accuracy and traceability to National In-
stitute of Standards and Technology (NIST).
qTroubleshooting a failed instrument to the exchange subassem-
bly level or the subsystem requiring adjustment.
qAdjusting instrument internal sub-systems.
qLocating and replacing failed parts.
Throughout this manual, the terms “37XXXD” and “VNA” will be used
interchangeably to refer to all Models of the 37000D series VNA, un-
less otherwise noted.
1-2 INTRODUCTION This chapter provides a general description of VNA systems, system
serial numbers, frequency ranges, and related manuals. It also in-
cludes service strategy, available service facilities, and static-sensitive
component handling precautions, and a list of recommended test
equipment.
1-3 IDENTIFICATION
NUMBER All Anritsu instruments are assigned a six-digit ID number, such as “042503”. This number appears on a decal affixed to the rear panel.
Please use this identification number during any correspondence with
Anritsu Customer Service about this instrument.
1-4 ONLINE MANUAL This manual is available for download as an Adobe Acrobat™ (*.pdf)
file. The file can be viewed using Acrobat Reader™, a free program
that is available from Adobe. This file is “linked” such that the viewer
can choose a topic to view from the displayed “bookmark” list and
“jump” to the manual page on which the topic resides. The text can
also be word-searched. Updates to this manual, if any, may also be
downloaded from the documents area of the Anritsu Internet site at:
http://www.us.anritsu.com
37XXXD MM 1-3

1-5 SYSTEM DESCRIPTION The 37XXXD Analyzers are microprocessor controlled Vector Network
Analyzers. Each is a single-instrument system that contains a built-in
signal source, a test set, and an analyzer subsystem. These analyzers
are produced in eight models that cover a range of from 40 MHz to
65 GHz. The table below lists the frequencies for each model:
1-6 RELATED MANUALS The 37XXXD Vector Network Analyzer Operation Manual
(10410-00261) describes the front panel operation for all 37XXXD
models. It also contains general information, specifications, and Per-
formance Verification procedures for all models.
The 37XXXD Series Vector Network Analyzer Programming Manual
(10410-00262) describes all 37XXXD GPIB commands and provides
programming information for operation of the VNA remotely via the
IEEE-488 General Purpose Interface Bus. Included at the rear of that
manual is the 37XXXD Series Vector Network Analyzer GPIB Quick
Reference Guide (10410-00263).
SYSTEM DESCRIPTION GENERAL INFORMATION
1-4 37XXXD MM
Model Freq Range
37247D 40.0 MHz to 20.0 GHz
37269D 40.0 MHz to 40.0 GHz
37277D 40.0 MHz to 50.0 GHz
37297D 40.0 MHz to 65.0 GHz
Model Freq Range
37347D 40.0 MHz to 20.0 GHz
37369D 40.0 MHz to 40.0 GHz
37377D 40.0 MHz to 50.0 GHz
37397D 40.0 MHz to 65.0 GHz
37XXXD Models and Frequency Ranges

1-7 STANDARD OPTIONS Options that are available on the 37XXXD family are shown in the list
below:
qOption 1: Rack Mounts with Slides
qOption 1A: Rack Mounts without Slides
qOption 2A: High Speed Time Domain
qOption 4A: External SCSI Disk Drive (internal hard drive re-
moved)
qOption 7A, 7N, 7NF, or 7S: Replace Test Port Connectors with
Type GPC-7, N, NF, or 3.5 mm
qOption 15K: Front Panel Access Connections for Samplers
(K connectors only)
qOption 15V: Front Panel Access Connections for Samplers
(V connectors only)
Contact your local Anritsu representative for information about in-
stalling any of the above options for the 37XXXD family.
Note
Many options that were available in 37XXXA/B/C families
are now standard and installed in all models of the 37XXXD
family. Examples of this are Options 3, 10, 10A, and 12.
1-8 SERVICE STRATEGY This section provides an overview of the VNA service strategy and
available service facilities. It also provides references to the informa-
tion in various locations in this manual needed to accomplish the re-
quired service functions.
Functional Assembly
Level Troubleshooting The VNA modular design, extensive built-in diagnostics, and auto-
mated service tools are designed to support fast exchange of functional
assembly level repairs.
Failed assemblies are not field repairable. Once an assembly is found
to be faulty, it should be returned to an authorized Anritsu Service
Center for exchange. Refer to the description of the Exchange Assem-
bly Program in Chapter 2, Replaceable Parts.
The procedures for troubleshooting a failed VNA are described in
Chapter 7, Troubleshooting.
GENERAL INFORMATION STANDARD OPTIONS
37XXXD MM 1-5

Internal Hardware
Adjustments and
Calibrations
There are five automated internal hardware field calibrations. Two of
them are used to characterize the VNA frequency and power genera-
tion sub-systems. These calibrations insure fast, consistent phase lock
of system frequencies and proper compensation, leveling, and flatness
of system power at the front panel test ports.
To conduct these calibrations, you need only connect the appropriate
test equipment (counter or power meter) to the VNA and initiate the
calibration. The VNA will control itself and the externally connected
test equipment to perform measurements and store calibration con-
stants in its internal battery backed RAM (BBRAM).
The procedures for adjusting the VNA are described in this manual in
Chapter 6, Adjustments.
Internal Service Log The VNA continuously monitors itself for proper operation. Should a
failure occur, it notifies the user via a failure message on the display
screen. (In remote-only operation, it also sets the GPIB Status Byte, if
enabled.) It also writes the error message along with some data perti-
nent to the failure to an internal service log stored in battery backed
memory.
The service log can be checked at any time to view (without erasing)
all error messages that were written into it. It is capable of storing
more than 30 pages of service messages and data. The VNA will auto-
matically remove the oldest errors first to make room for new errors, if
necessary. To check the contents of the service log, use the procedure
described in Chapter 4, Operational Performance Tests.
NOTE
AprintedordiskfilecopyoftheServiceLog(withthefailure
in question) must be made available to Anritsu when ex-
changing a failed assembly, or when requesting service sup-
port. Refer to Chapter 2, Replaceable Parts, for further
information.
SERVICE STRATEGY GENERAL INFORMATION
1-6 37XXXD MM

System
Test/Certification Quick operational checkout of the system may be accomplished by the
system user or for incoming inspection purposes using the “Opera-
tional Checkout” chapter in the 37XXXD Operation Manual. Those
procedures are useful in quickly verifying that the instrument’s pri-
mary measurement functions are operational and stable.
Full operational testing of the system is detailed in Chapter 4,
Operational Performance Tests (or Appendix D for ME7808B/C
systems). These tests should be performed annually or whenever a
measurement problem is suspected.
Verification of the system’s measurement accuracy and other key
performance parameters may be done using the procedures in Chapter
5, System Performance Verification (or Appendix D for ME7808B/C
systems). This should be performed annually or whenever a
measurement problem is suspected.
Servicing Specially
Modified Instruments Instruments with customer requested special modifications performed
by Anritsu will have an identifying Specials Modification number
printed on the rear panel. This number will be preceded with the
letters SM, that is, SM1234 is special modification number 1234. This
manual contains information on servicing instruments fitted with
SM5955 (67 GHz operation).
Special instruments may have service requirements different from
those specified in this manual. Contact your local Service Center if you
need more information when servicing such instruments.
1-9 SERVICE SUPPORT The following sections briefly describe the various service support ser-
vices and aids available to you to help you maintain your VNA.
Technical Support Technical service support is available by contacting any Anritsu
Worldwide Service Center (refer to Table 2-1), or service support may
be obtained directly from the factory by contacting:
Anritsu Company
ATTN: Customer Service
490 Jarvis Drive
Morgan Hill, CA 95037-2809
Telephone: [phone]
FAX: [phone]
GENERAL INFORMATION SERVICE SUPPORT
37XXXD MM 1-7

Service Software The service software listed below is contained on the diskette located
at the rear of this manual:
Anritsu 37XXX Test Software (2300-178).
This software contains a series of automated tests designed to insure
the VNA signal paths are functioning properly and capable of support-
ing stable calibrations and measurements. See the “Operational Per-
formance Tests” chapter for details.
Anritsu 37XXX Performance Verification Software
(2300-480 or 2300-496).
This software is used to verify the VNA’s published measurement ac-
curacy and traceability to the U.S. National Institute of Standards and
Technology (NIST). See the “System Performance Verification” chapter
for details.
NOTE
Useof2300-496isrequiredforverificationofbroadbandsys-
tems using W1 coaxial connectors
SERVICE SUPPORT GENERAL INFORMATION
1-8 37XXXD MM