HP 70908A User manual
Errata
Title & Document Type: HP 70908A RF Section Service Guide
Manual Part Number: 70908-90193
Revision Date: April 1997
HP References in this Manual
This manual may contain references to HP or Hewlett-Packard. Please note that
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this manual copy. The HP 70908A referred to in this document is now the Agilent
70908A.
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Service Guide
HP 70908A
RF Section
ABCDE
HP Part No. 70908-90193
Printed in USA April 1997
Edition A.0.0
Notice
The information contained in this document is subject to change without notice.
Hewlett-Packard makes no warranty of any kind with regard to this material, including,
but not limited to, the implied warranties of merchantability and tness for a particular
purpose. Hewlett-Packard shall not be liable for errors contained herein or for incidental or
consequential damages in connection with the furnishing, performance, or use of this material.
Restricted Rights Legend.
Use, duplication, or disclosure by the U.S. Government is subject to restrictions as set forth
in subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer Software clause at
DFARS 252.227-7013 for DOD agencies, and subparagraphs (c) (1) and (c) (2) of the Commercial
Computer Software Restricted Rights clause at FAR 52.227-19 for other agencies.
c
Copyright Hewlett-Packard Company 1988, 1997
All Rights Reserved. Reproduction, adaptation, or translation without prior written permission
is prohibited, except as allowed under the copyright laws
.
1400 Fountaingrove Parkway, Santa Rosa, CA 95403-1799, USA
Certication
Hewlett-Packard Company certies that this product met its published specications at the
time of shipment from the factory. Hewlett-Packard further certies that its calibration
measurements are traceable to the United States National Institute of Standards and
Technology, to the extent allowed by the Institute's calibration facility, and to the calibration
facilities of other International Standards Organization members.
Warranty
This Hewlett-Packard instrument product is warranted against defects in material and
workmanship for a period of one year from date of shipment. During the warranty period,
Hewlett-Packard Company will, at its option, either repair or replace products which prove to
be defective.
For warranty service or repair, this product must be returned to a service facility designated by
Hewlett-Packard. Buyer shall prepay shipping charges to Hewlett-Packard and Hewlett-Packard
shall pay shipping charges to return the product to Buyer. However, Buyer shall pay all
shipping charges, duties, and taxes for products returned to Hewlett-Packard from another
country.
Hewlett-Packard warrants that its software and rmware designated by Hewlett-P
ackard for
use with an instrument will execute its programming instructions when properly installed on
that instrument. Hewlett-Packard does not warrant that the operation of the instrument, or
software, or rmware will be uninterrupted or error-free.
Limitation of Warranty
The foregoing warranty shall not apply to defects resulting from improper or inadequate
maintenance by Buyer, Buyer-supplied software or interfacing, unauthorized modication or
misuse, operation outside of the environmental specications for the product, or improper
site preparation or maintenance.
NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. HEWLETT-PACKARD SPECIFICALLY
DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE.
Exclusive Remedies
THE REMEDIES PROVIDED HEREIN ARE BUYER'S SOLE AND EXCLUSIVE REMEDIES.
HEWLETT-PACKARD SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT, TORT,
OR ANY OTHER LEGAL THEORY.
Assistance
Product maintenance agreements and other customer assistance agreements are available for
Hewlett-Packard products.
For any assistance, contact your nearest Hewlett-Packard Sales and Service Oce.
iii
Safety Symbols
The following safety symbols are used throughout this manual. Familiarize yourself with each
of the symbols and its meaning before operating this instrument.
CAUTION
The
CAUTION
sign denotes a hazard. It calls attention to a procedure which, if
not correctly performed or adhered to, could result in damage to or destruction
of the product or the user's work. Do not proceed beyond a
CAUTION
sign
until the indicated conditions are fully understood and met.
WARNING
The
WARNING
sign denotes a hazard. It calls attention to a procedure
which, if not correctly performed or adhered to, could result in injury
to the user. Do not proceed beyond a
WARNING
sign until the indicated
conditions are fully understood and met.
DANGER
The
DANGER
sign denotes an imminent hazard to people. It warns the
reader of a procedure which, if not correctly performed or adhered to,
could result in injury or loss of life. Do not proceed beyond a
DANGER
sign until the indicated conditions are fully understood and met.
iv
General Safety Considerations
WARNING
The instructions in this document are for use by qualied personnel
only.To avoid electrical shock, do not perform any servicing unless you
are qualied to do so.
The opening of covers or removal of parts is likely to expose dangerous
voltages. Disconnect the instrument from all voltage sources while it is
being opened.
The power cord is connected to internal capacitors that may remain live
for ve seconds after disconnecting the plug from its power supply.
This is a Safety Class 1 Product (provided with a protective earthing
ground incorporated in the power cord). The mains plug shall only be
inserted in a socket outlet provided with a protective earth contact.
Any interruption of the protective conductor inside or outside of the
instrument is likely to make the instrument dangerous. Intentional
interruption is prohibited.
For continued protection against re hazard, replace fuse only with
same type and ratings, (type nA/nV). The use of other fuses or materials
is prohibited.
WARNING
Before this instrument is switched on, make sure it has been properly
grounded through the protective conductor of the ac power cable to a
socket outlet provided with protective earth contact.
Any interruption of the protective (grounding) conductor, inside
or outside the instrument, or disconnection of the protective earth
terminal can result in personal injury.
Before this instrument is switched on, make sure its primary power
circuitry has been adapted to the voltage of the ac power source
.
Failure to set the ac power input to the correct voltage could cause
damage to the instrument when the ac power cable is plugged in.
v
Servicing at a Glance
vi
The RF section is a module that is used in HP 70000 Series modular measurement systems.
A standard modular spectrum analyzer system includes a mainframe with an RF section ,
IF section, local oscillator, an optional display, and an optional precision frequency reference.
Software and documentation supplied
This service guide is part of an Option OB3 package which includes:
HP 70908A Service Guide
HP 70908A Component Level Information Packages
Module verication software disks.
Tools needed
Before servicing, refer to Chapter 5 for a list of the tools and accessories that may be needed
during servicing.
Antistatic precautions
Electrical components are easily damaged by small amounts of static electricity. If possible,
work at a static-safe work station. For further information, refer to \Preparing a Static-Safe
Work Station" in Chapter 4.
vii
In This Book
This book describes all of the service procedures necessary to test, adjust, troubleshoot, and
repair your RF section.
Each MMS module has its own service guide.For further information related to the servicing of
additional and alternate modules that can be used in this system, refer to that module's service
guide.
This service guide is part of an Option OB3 package which consists of two manuals.
Manual 1
Chapter 1 provides information to help get you started so that your RF section is serviced
properly.
Chapter 2 contains information needed to use module verication software while servicing
your RF section.
Chapter 3 contains information to help identify and resolve some common problems that may
occur with your RF section before extensive servicing.
Chapter 4 contains information about troubleshooting your RF section. It presents
information on preparing a static-safe work station and includes a set of troubleshooting
procedures that can be used to optimize repair time
.
Chapter 5 contains tables with a complete listing of all equipment that may be required for
servicing.
Chapter 6 contains the setups for all equipment calibration procedures that must be
performed in order to optimize module performance when assemblies are changed, repaired,
or adjusted.
Chapter 7 contains the setups for all adjustment procedures that are used to optimize module
performance when assemblies are changed, repaired, or adjusted.
Chapter 8 contains the setups for all module verication tests that are used to optimize
module performance when assemblies are changed, repaired, or adjusted.
Chapter 9 contains procedures for removal and replacement of major assemblies in your
RF section. It also contains information needed to order mechanical parts for your
RF section.
Chapter 10 contains information on all overall parts identication drawings that should be
used when performing the troubleshooting procedures descibed in this service guide.
An index is added at the end of this service guide to aid the user in nding key items of
interest.
Manual 2
Manual 2 is a separate volume that contains packets of component-level repair information
for each RF section board assembly that has eld-replaceable parts. Each packet includes the
parts list, component-location drawing, and schematics for a specic board-assembly part
number. Manual 2 also contains a table that can be used to cross reference dierent board
assemblies that have dierent serial prex breaks.
Before you begin servicing
, you must become familiar with module verication software.For
information on how to use this module verication software, refer to Chapter 2.
viii
Contents
1. Getting Started
What Is Servicing? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
When Is Servicing Needed? . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
If You Want Hewlett-Packard to Service Your RF Section . . . . . . . . . . . . 1-3
Determining the Serial Number of Your RF Section . . . . . . . . . . . . . . 1-3
Returning Your RF Section for Service ................... 1-5
2. Module Verication Software
Computer Compatibility ........................... 2-2
Alternate Key Labels .. .. .. .. .. .. .. .. .. .. .. .. .. . 2-2
Computer Language Compatibility ..................... 2-2
Printer Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Conguring the Hardware .. .. .. .. .. .. .. .. .. .. .. .. .. 2-4
Installing Module Verication Software .................... 2-5
Module Verication Software Overview . . . . . . . . . . . . . . . . . . . . 2-7
Testing Multiple Modules . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Error Messages or Warnings Dened .... .. .. .. .. .. . .. .. . 2-7
Final Tests Dened . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Single Tests Dened .... .. .. .. .. .. .. .. . .. .. .. .. . 2-8
Printing Test Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Menus ................................... 2-9
Menu Structure .............................. 2-9
Edit and Command Screen Menus . . . . . . . . . . . . . . . . . . . . . . 2-9
Edit Screen Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Command Screen Menus . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Cursor Keys and Menu Selections . . . . . . . . . . . . . . . . . . . . . 2-10
Main Menu ................................ 2-11
Mass Storage Menu .... .. .. .. .. .. .. .. .. .. . .. .. . 2-11
Mass Storage Menu Edit Screen . . . . . . . . . . . . . . . . . . . . . . 2-12
Mass Storage Menu Command Screen . . . . . . . . . . . . . . . . . . . 2-12
Parameter Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Parameter Menu Edit Screen . . . . . . . . . . . . . . . . . . . . . . . 2-12
Parameter Menu Command Screen .... .. .. .. .. .. .. .. .. 2-13
Equipment Menu ............................. 2-13
Equipment Menu Edit Screen . . . . . . . . . . . . . . . . . . . . . . . 2-14
Equipment Menu Command Screen . . . . . . . . . . . . . . . . . . . . 2-14
Edit Calibration Data .... .. .. .. .. .. .. .. . .. .. .. .. 2-15
Edit Calibration Data Edit Screen . . . . . . . . . . . . . . . . . . . . . 2-16
Edit Calibration Data Command Screen . . . . . . . . . . . . . . . . . . 2-16
HP-MSIB Address Menu .......................... 2-16
Test Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Test Menu Command Screen .... .. .. .. .. .. .. .. .. .. . 2-17
Error and Status Messages .......................... 2-23
Contents-1
3. Before Extensive Servicing
If the System's Power-On Self Test Fails . . . . . . . . . . . . . . . . . . . . 3-2
If Your HP 70908A RF Section is Powered On But Not Responding Correctly . . . 3-4
If One or More Modules' Error Indicator is Flashing .............. 3-5
4. Troubleshooting
Preparing a Static-Safe Work Station .... .. .. .. .. .. .. .. .. . 4-2
If Operating Errors Messages (2000{2999) Occur . . . . . . . . . . . . . . . . 4-4
If Hardware Error Messages (7000{7999) Occur .... .. .. .. .. .. .. 4-5
If You Have Adjustment Procedure Failures .. .. .. .. .. .. .. .. .. 4-9
If 2nd Converter Fails ............................ 4-11
If You Have Adjustments Procedure Failures . . . . . . . . . . . . . . . . . . 4-15
If You Have Verication Test Failures ..................... 4-16
Troubleshooting the A1 Leveling Amplier .. .. .. .. .. .. .. .. .. 4-25
Troubleshooting the A2 LO Multiplier . . . . . . . . . . . . . . . . . . . . . 4-28
Troubleshooting the A3 SYTFMD ....................... 4-30
Troubleshooting the A4 Input Attenuator ................... 4-34
Troubleshooting and Alignment of the A5, A7, A8, A9 . . . . . . . . . . . . . 4-35
Troubleshooting the A10 Power Supply/Driver . . . . . . . . . . . . . . . . . 4-38
Troubleshooting the A11 Last Converter ................... 4-46
Troubleshooting the A12 Controller . . . . . . . . . . . . . . . . . . . . . . 4-47
Troubleshooting the A13 ALC/Bias .... .. .. .. .. .. .. .. .. .. 4-48
Troubleshooting the A15 RF 1st Converter .... .. .. .. .. .. .. .. 4-49
The Troubleshooting Tool Program ...................... 4-50
Performing Related Adjustments and Verication Tests . . . . . . . . . . . . . 4-51
Overall Block Diagram of RF Section ..................... 4-55
5. Recommended Test Equipment Tables
Specialized Test Equipment ET . . . . . . . . . . . . . . . . . . . . . . . . 5-3
6. System Calibration
External Frequency Reference ........................ 6-2
Test System Calibration ........................... 6-6
7. Adjustment Procedures
Before You Make Adjustments ........................ 7-2
Overall Adjustment Equipment Setup . . . . . . . . . . . . . . . . . . . . . 7-3
Adjustment 01. LOLA Gate Bias .. .. .. .. .. .. .. .. .. .. .. . 7-4
Adjustment 02. Multiplier Gate Bias .. .. .. .. .. .. .. .. .. .. . 7-6
Adjustment 03. Reference Voltage ...................... 7-8
Adjustment 04. LOLA Power Out . . . . . . . . . . . . . . . . . . . . . . . 7-10
Adjustment 05. LOLA Tuned Filter . . . . . . . . . . . . . . . . . . . . . . 7-12
Adjustment 06. SYTFMD Oset Coil ..................... 7-14
Adjustment 07. SYTFMD Main Coil Preset . . . . . . . . . . . . . . . . . . . 7-17
Adjustment 08. Multiplier Power Leveling . . . . . . . . . . . . . . . . . . . 7-20
Adjustment 09. SYTFMD Main Coil Alignment . . . . . . . . . . . . . . . . . 7-25
Adjustment 10. VCO Tune-Line Voltage . . . . . . . . . . . . . . . . . . . . 7-28
Adjustment 11. VCO 2nd LO Frequency/Amplitude .............. 7-30
Adjustment 12. 2nd Converter LO Feedthrough .... .. .. .. .. .. .. 7-32
Adjustment 13. Sampler IF Out DC . . . . . . . . . . . . . . . . . . . . . . 7-34
Adjustment 14. Sampler IF Out AC ...................... 7-36
Adjustment 15. Search Oscillator Duty Cycle and P
eriod . . . . . . . . . . . . 7-38
Adjustment 16. Search Oscillator Square Wave Min/Max ............ 7-40
Adjustment 17. Search Oscillator Tune Line Peak .... .. .. .. .. .. . 7-42
Adjustment 18. Phase Lock Check ...................... 7-44
Contents-2
Adjustment 19. VCO Tune Range Preliminary Check . . . . . . . . . . . . . . 7-46
Adjustment 20. Lock Range Measurement . . . . . . . . . . . . . . . . . . . 7-48
Adjustment 21. Mixer Bias . . . . . . . . . . . . . . . . . . . . . . . . . . 7-50
Adjustment 22. 2nd Converter Bandpass Filter Tune . . . . . . . . . . . . . . 7-52
Adjustment 23. VCO Tune Range Final .... .. .. .. .. .. .. .. .. 7-55
Adjustment 24. Last Converter Bandpass Filter ................ 7-57
Adjustment 25. Noise Figure Last Converter . . . . . . . . . . . . . . . . . . 7-60
Adjustment 26. Noise Figure 2nd Converter . . . . . . . . . . . . . . . . . . 7-62
Adjustment 27. 21.4 MHz IF Frequency Response .. .. .. .. .. .. .. . 7-64
8. Module Verication Tests
Before You Begin Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
Overall Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
Test 01. Flatness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
Test 02. Low Frequency Flatness
<
10MHz.................. 8-6
Test 03. Attenuator Accuracy .... .. .. .. .. .. .. .. .. .. .. 8-8
Test 04. Front Panel LEDs .. .. .. .. .. .. .. .. .. . .. .. .. . 8-10
Test 05. 10.7 MHz Rejection ......................... 8-12
Test 06. Feedthrough Out 21.4 MHz Port ................... 8-14
Test 07. Harmonics Out 21.4 MHz Port .................... 8-16
Test 08. Residual Emissions Out 21.4 MHz Port ................ 8-18
Test 09. Image Rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-20
Test 10. IF Rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22
Test 11. 2nd Converter Startup . . . . . . . . . . . . . . . . . . . . . . . . 8-24
Test 12. IF Sub-Harmonics .... .. .. .. .. .. .. .. .. .. .. .. 8-25
Test 13. Residual Responses .. .. .. .. .. .. .. . .. .. .. .. .. 8-27
Test 14. Miscellaneous Residual Responses .. .. .. .. .. .. .. .. .. 8-29
Test 15. 321.4 MHz IF Out Frequency Response .. .. .. .. .. .. .. .. 8-31
Test 16. 21.4 MHz IF Frequency Response . . . . . . . . . . . . . . . . . . . 8-33
Test 17. Step Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-35
Test 18. Gain Compression . . . . . . . . . . . . . . . . . . . . . . . . . . 8-37
Test 19. Aux LO Power and Harmonics .................... 8-39
Test 20. Diagnostics .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 8-41
Test 21. LO Input Amplitude Range . . . . . . . . . . . . . . . . . . . . . . 8-45
Test 22. RF Input Emissions ......................... 8-47
Test 23. RF Input Return Loss ........................ 8-48
Test 24. LO Output Return Loss ....................... 8-50
Test 25. LO Input Return Loss .. .. .. .. .. .. .. .. .. .. .. .. 8-52
Test 26. Reference Return Loss . . . . . . . . . . . . . . . . . . . . . . . . 8-54
Test 27. Wide IF Output Return Loss ..................... 8-56
Test 28. Narrow IF Output Return Loss . . . . . . . . . . . . . . . . . . . . 8-58
Test 29. Noise Figure ............................ 8-60
9. Replacing Major Assemblies
Module Cover ................................ 9-2
Front Panel ................................. 9-3
Rear Panel ................................. 9-6
Bandpass Filter ............................... 9-9
A1 Leveling Amplier ............................ 9-12
A2 LO Multiplier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-14
A3 SYTFMD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-16
A4 Input Attenuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-18
A5 VCO Sampler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-21
A6 Isolator ................................. 9-25
A7 2nd Mixer ................................ 9-26
Contents-3
A8 321.4 MHz Matching Network . . . . . . . . . . . . . . . . . . . . . . . 9-28
A9 2nd Converter PLL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-30
A10 Power Supply/Driver .......................... 9-33
A11 Last Converter .... .. .. .. .. .. .. .. .. .. .. .. .. . 9-35
A12 Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-38
A13 ALC/Bias . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-39
A14 Front Panel Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-40
A15 RF 1st Converter ............................ 9-41
A16 Low Pass Filter .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 9-43
A17 Low Pass Filter .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 9-45
10. Overall Parts Identication Drawings
Major Cables ................................ 10-2
Front View Identication . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5
Rear View Identication .. .. .. .. .. .. .. .. .. .. .. .. .. . 10-6
Top View Identication . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-7
Bottom View Identication . . . . . . . . . . . . . . . . . . . . . . . . . . 10-8
Side View Identication ........................... 10-9
Left Side Cover Removed Identication . . . . . . . . . . . . . . . . . . . . 10-11
Right Side Cover Removed Identication .... .. .. .. .. .. .. .. . 10-14
Index
Contents-4
Figures
1-1. Typical Serial Number Label .. .. .. .. .. .. .. .. .. .. .. .. 1-3
2-1. Main Menu Softkeys . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
2-2. Mass Storage Menu and Parameter Menu Softkeys . . . . . . . . . . . . . . 2-20
2-3. Equipment Menu and HP-MSIB Map Screen Menu Softkeys . . . . . . . . . . 2-21
2-4. Test Menu Softkeys ............................ 2-22
3-1. Line Voltage Selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3-2. Line Fuse Removal and Replacement .................... 3-2
4-1. Static-Safe Work Station .. .. .. .. .. .. .. .. .. .. .. .. .. 4-2
4-2. Notch-Filter Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27
4-3. Bandpass-Filter Drive Waveform ...................... 4-29
4-4. Test Connector Construction ........................ 4-32
4-5. Discriminator Output Waveform ...................... 4-33
4-6. Signal at A10Q1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-40
4-7. Linearity Compensation Waveform .. .. .. .. .. .. .. .. .. . .. 4-43
4-8. Notch Filter Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44
4-9. Overall Block Diagram of RF Section .. .. .. .. .. .. .. .. .. .. 4-55
5-1. Typical Microwave Source Adjustment Setup Using Tune + Span ET ..... 5-3
5-2. Tune + Span ET Schematic .... .. .. .. .. .. .. .. .. .. .. 5-4
5-3. Tune + Span ET Component Locations .. .. .. .. .. .. . .. .. .. 5-4
5-4. Tune + Span ET Ramp Converter Adjustment Setup . . . . . . . . . . . . . 5-6
5-5. Equipment Setup for Oset-Coil-Current ET . . . . . . . . . . . . . . . . . 5-7
6-1. Preferred Frequency Reference Connections ................ 6-3
6-2. Using an HP 70310A Precision Frequency Reference and a House Standard .. 6-4
6-3. Using an HP 70310A Precision Frequency Reference . . . . . . . . . . . . . 6-4
6-4. Using an HP 8566B Spectrum Analyzer and a House Standard ........ 6-5
6-5. Synthesized Source Calibration Test Setup . . . . . . . . . . . . . . . . . . 6-6
6-6. Microwave Source Calibration Test Setup .... .. .. .. .. .. .. .. 6-7
6-7. Spectrum Analyzer Reference Calibration Test Setup . . . . . . . . . . . . . 6-8
6-8. Spectrum Analyzer IF Calibration Test Setup .... .. .. .. .. .. .. 6-8
6-9. Spectrum Analyzer RF Calibration Test Setup .. .. .. .. .. .. .. .. 6-9
6-10. Flatness Calibration and Verication Test Setup .. .. .. .. .. .. .. . 6-10
6-11. Return Loss Test Block Calibration Setup .................. 6-12
6-12. Noise Figure Meter Calibration Test Setup . . . . . . . . . . . . . . . . . . 6-13
7-1. Overall Adjustment Equipment Setup . . . . . . . . . . . . . . . . . . . . 7-3
7-2. Equipment Setup for Adjustment 01. LOLA Gate Bias .. .. .. .. .. .. 7-4
7-3. Locations for Adjustment 01. LOLA Gate Bias . . . . . . . . . . . . . . . . 7-4
7-4. Equipment Setup for Adjustment 02. Multiplier Gate Bias .......... 7-6
7-5. Locations for Adjustment 02. Multiplier Gate Bias . . . . . . . . . . . . . . 7-6
7-6. Equipment Setup for Adjustment 03. Reference Voltage ........... 7-8
7-7. Locations for Adjustment 03. Reference Voltage . . . . . . . . . . . . . . . 7-8
7-8. Equipment Setup for Adjustment 04. LOLA Power Out . . . . . . . . . . . . 7-10
7-9. Locations for Adjustment 04. LOLA Power Out .. .. .. .. .. .. .. . 7-10
7-10. Equipment Setup for Adjustment 05. LOLA Tuned Filter . . . . . . . . . . . 7-12
7-11. Locations for Adjustment 05. LOLA Tuned Filter .............. 7-12
7-12. Equipment Setup for Adjustment 06. SYTFMD Oset Coil .... .. .. .. 7-14
7-13. Locations for Adjustment 06. SYTFMD Oset Coil . . . . . . . . . . . . . . 7-14
Contents-5
7-14. Equipment Setup for Adjustment 07. SYTFMD Main Coil Preset ....... 7-17
7-15. Locations for Adjustment 07. SYTFMD Main Coil Preset ........... 7-17
7-16. Equipment Setup for Adjustment 08. Multiplier Power Leveling ....... 7-20
7-17. Locations for Adjustment 08. Multiplier Power Leveling ........... 7-21
7-18. Locations of MUT LEVEL LED and Connect Points for Adjustment 08. Multiplier
Power Leveling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-21
7-19. Equipment Setup for Adjustment 09. SYTFMD Main Coil Alignment .... . 7-25
7-20. Locations for Adjustment 09. SYTFMD Main Coil Alignment .... .. .. . 7-25
7-21. Equipment Setup for Adjustment 10. VCO Tune-Line Voltage . . . . . . . . . 7-28
7-22. Locations for Adjustment 10. VCO Tune-Line Voltage .. .. .. .. .. .. 7-28
7-23. Equipment Setup for Adjustment 11. VCO 2nd LO Frequency/Amplitude ... 7-30
7-24. Locations for Adjustment 11. VCO 2nd LO Frequency/Amplitude . . . . . . . 7-30
7-25. Equipment Setup for Adjustment 12. 2nd Converter LO Feedthrough . . . . . 7-32
7-26. Locations for Adjustment 12. 2nd Converter LO Feedthrough ........ 7-32
7-27. Equipment Setup for Adjustment 13. Sampler IF Out DC . . . . . . . . . . . 7-34
7-28. Locations for Adjustment 13. Sampler IF Out DC .... .. .. .. .. .. 7-34
7-29. Equipment Setup for Adjustment 14. Sampler IF Out AC... .. .. .. .. 7-36
7-30. Locations for Adjustment 14. Sampler IF Out AC .............. 7-36
7-31. Equipment Setup for Adjustment 15. Search Oscillator Duty Cycle and Period . 7-38
7-32. Locations for Adjustment 15. Search Oscillator Duty Cycle and Period .... 7-38
7-33. Equipment Setup for Adjustment 16. Search Oscillator Square Wave Min/Max . 7-40
7-34. Locations for Adjustment 16. Search Oscillator Square Wave Min/Max . . . . . 7-40
7-35. Equipment Setup for Adjustment 17. Search Oscillator Tune Line Peak .... 7-42
7-36. Locations for Adjustment 17. Search Oscillator Tune Line Peak.... .. .. 7-42
7-37. Equipment Setup for Adjustment 18. Phase Lock Check ........... 7-44
7-38. Locations for Adjustment 18. Phase Lock Check . . . . . . . . . . . . . . . 7-44
7-39. Equipment Setup for Adjustment 19. VCO Tune Range Preliminary Check . . . 7-46
7-40. Locations for Adjustment 19. VCO Tune Range Preliminary Check ...... 7-46
7-41. Equipment Setup for Adjustment 20. Lock Range Measurement ....... 7-48
7-42. Locations for Adjustment 20. Lock Range Measurement ........... 7-48
7-43. Equipment Setup for Adjustment 21. Mixer Bias . . . . . . . . . . . . . . . 7-50
7-44. Locations for Adjustment 21. Mixer Bias .... .. .. .. .. .. .. .. 7-50
7-45. Equipment Setup for Adjustment 22. 2nd Converter Bandpass Filter Tune .. 7-52
7-46. Locations for Adjustment 22. 2nd Converter Bandpass Filter Tune .... .. 7-53
7-47. Locations for Adjustment 22. 2nd Converter Bandpass Filter Tune .... .. 7-54
7-48. Equipment Setup for Adjustment 23. VCO Tune Range Final . . . . . . . . . 7-55
7-49. Locations for Adjustment 23. VCO Tune Range Final . . . . . . . . . . . . . 7-56
7-50. Equipment Setup for Adjustment 24. Last Converter Bandpass Filter . . . . . 7-57
7-51. Locations for Adjustment 24. Last Converter Bandpass Filter . . . . . . . . . 7-58
7-52. Equipment Setup for Adjustment 25. Noise Figure Last Converter ...... 7-60
7-53. Locations for Adjustment 25. Noise Figure Last Converter .......... 7-60
7-54. Equipment Setup for Adjustment 26. Noise Figure 2nd Converter .. .. .. 7-62
7-55. Locations for Adjustment 26. Noise Figure 2nd Converter .......... 7-62
7-56. Equipment Setup for Adjustment 27. 21.4 MHz IF Frequency Response . . . . 7-64
8-1. Overall RF Section Verication Test Setup . . . . . . . . . . . . . . . . . . 8-3
8-2. Equipment Setup for Test 01. Flatness .... .. .. .. .. . .. .. .. 8-4
8-3. Equipment Setup for Test 02. Low Frequency Flatness
<
10MHz....... 8-6
8-4. Equipment Setup for Test 03. Attenuator Accuracy .. .. .. .. .. .. . 8-8
8-5. Equipment Setup for Test 04. Front Panel LEDs . . . . . . . . . . . . . . . 8-10
8-6. Equipment Setup for Test 05. 10.7 MHz Rejection .............. 8-12
8-7. Equipment Setup for Test 06. Feedthrough Out 21.4 MHz Port ........ 8-14
8-8. Equipment Setup for Test 07. Harmonics Out 21.4 MHz Port .. .. .. .. . 8-16
8-9. Equipment Setup for Test 08. Residual Emissions Out 21.4 MHz Port .... . 8-18
8-10. Equipment Setup for Test 09. Image Rejection . . . . . . . . . . . . . . . . 8-20
8-11. Equipment Setup of Test 10. IF Rejection . . . . . . . . . . . . . . . . . . 8-22
Contents-6
8-12. Equipment Setup for Test 11. 2nd Converter Startup ............ 8-24
8-13. Equipment Setup for Test 12. IF Sub-Harmonics . . . . . . . . . . . . . . . 8-25
8-14. Equipment Setup for Test 13. Residual Responses .............. 8-27
8-15. Equipment Setup for Test 14. Miscellaneous Residual Responses ....... 8-29
8-16. Equipment Setup for Test 15. 321.4 MHz IF Out Frequency Response . . . . . 8-31
8-17. Equipment Setup for Test 16. 21.4 MHz IF Frequency Response .... . .. 8-33
8-18. Equipment Setup for Test 17. Step Gain . . . . . . . . . . . . . . . . . . . 8-35
8-19. Equipment Setup for Test 18. Gain Compression . . . . . . . . . . . . . . . 8-37
8-20. Equipment Setup for Test 19. Aux LO Power and Harmonics . . . . . . . . . 8-39
8-21. Equipment Setup for Test 20. Diagnostics (1 of 2) .... .. .. .. .. .. 8-41
8-22. Equipment Setup for Test 20. Diagnostics (2 of 2) .... .. .. .. .. .. 8-42
8-23. Equipment Setup for Test 21. LO Input Amplitude Range .... .. .. .. 8-45
8-24. Equipment Setup for Test 22. RF Input Emissions .............. 8-47
8-25. Equipment Setup for Test 23. RF Input Return Loss .. .. .. .. .. .. . 8-48
8-26. Equipment Setup for Test 24. LO Output Return Loss ............ 8-50
8-27. Equipment Setup for Test 25. LO Input Return Loss ............. 8-52
8-28. Equipment Setup for Test 26. Reference Return Loss .. .. .. .. .. .. 8-54
8-29. Equipment Setup for Test 27. Wide IF Output Return Loss . . . . . . . . . . 8-56
8-30. Equipment Setup for Test 28. Narrow IF Output Return Loss . . . . . . . . . 8-58
8-31. Equipment Setup for Test 29. Noise Figure ................. 8-60
9-1. Module Cover Removal/Replacement .................... 9-2
9-2. Front Panel Removal/Replacement (1 of 2) .. .. .. .. .. .. .. .. . 9-4
9-3. Front Panel Removal/Replacement (2 of 2) .. .. .. .. .. .. .. .. . 9-5
9-4. Rear Panel Removal/Replacement (1 or 2) . . . . . . . . . . . . . . . . . . 9-7
9-5. Rear Panel Removal/Replacement (2 or 2) . . . . . . . . . . . . . . . . . . 9-8
9-6. Bandpass Filter Removal/Replacement (1 or 2) . . . . . . . . . . . . . . . . 9-10
9-7. Bandpass Filter Removal/Replacement (2 or 2) . . . . . . . . . . . . . . . . 9-11
9-8. A1 Leveling Amplier Removal/Replacement ................ 9-13
9-9. A2 LO Multiplier Removal/Replacement . . . . . . . . . . . . . . . . . . . 9-15
9-10. A3 SYTFMD Removal/Replacement .. .. .. .. .. .. .. .. .. .. . 9-17
9-11. A4 Input Attenuator Removal/Replacement (1 of 2) ............. 9-19
9-12. A4 Input Attenuator Removal/Replacement (2 of 2) ............. 9-20
9-13. A5 VCO Sampler Removal/Replacement (1 of 3) ............... 9-22
9-14. A5 VCO Sampler Removal/Replacement (2 of 3) ............... 9-23
9-15. A5 VCO Sampler Removal/Replacement (3 of 3) ............... 9-24
9-16. A6 Isolator Removal/Replacement . . . . . . . . . . . . . . . . . . . . . . 9-25
9-17. A7 2nd Mixer Removal/Replacement .................... 9-27
9-18. A8 321.4 MHz Matching Network Removal/Replacement .... .. .. .. . 9-29
9-19. A9 2nd Converter PLL Removal/Replacement (1 of 2) ............ 9-31
9-20. A9 2nd Converter PLL Removal/Replacement (2 of 2) ............ 9-32
9-21. A10 Power Supply/Driver Removal/Replacement . . . . . . . . . . . . . . . 9-34
9-22. A11 Last Converter Removal/Replacement (1 of 2) . . . . . . . . . . . . . . 9-36
9-23. A11 Last Converter Removal/Replacement (2 of 2) . . . . . . . . . . . . . . 9-37
9-24. A12 Controller Removal/Replacement . . . . . . . . . . . . . . . . . . . . 9-38
9-25. A13 ALC/Bias Removal/Replacement .................... 9-39
9-26. A14 Front Panel Board Removal/Replacement . . . . . . . . . . . . . . . . 9-40
9-27. A15 RF 1st Converter Removal/Replacement ................ 9-42
9-28. A16 Low Pass Filter Removal/Replacement .. .. .. .. .. .. .. .. . 9-44
9-29. A17 Low Pass Filter Removal/Replacement .. .. .. .. .. .. .. .. . 9-46
10-1. Overall Parts Identication Drawing, Major Cables (1 of 3) .......... 10-3
10-2. Overall Parts Identication Drawing, Major Cables (2 of 3) .......... 10-3
10-3. Overall Parts Identication Drawing, Major Cables (3 of 3) .......... 10-4
10-4. Overall Parts Identication Drawing, Front View .............. 10-5
10-5. Overall Parts Identication Drawing, Rear View . . . . . . . . . . . . . . . 10-6
10-6. Overall Parts Identication Drawing, Top View ............... 10-7
Contents-7
10-7. Overall Parts Identication Drawing, Bottom View . . . . . . . . . . . . . . 10-8
10-8. Overall Parts Identication Drawing, Side View ............... 10-10
10-9. Overall Parts Identication Drawing, Left Side View, and Cover Removed (1 of 2) 10-12
10-10. Overall Parts Identication Drawing, Left Side View, and Cover Removed (2 of 2) 10-13
10-11. Overall Parts Identication Listing, Right Side View, A10 Power Supply/Driver
Facing Down, and Cover Removed . . . . . . . . . . . . . . . . . . . . 10-15
Contents-8
Tables
1-1. Hewlett-Packard Sales and Service Oces . . . . . . . . . . . . . . . . . . 1-4
1-2. Packaging for a 2/8 Module (RF Section) . . . . . . . . . . . . . . . . . . . 1-6
3-1. Default HP-MSIB Address Map ....................... 3-3
4-1. Static-Safe ESD Accessories .. .. .. .. .. .. .. . .. .. .. .. . 4-3
4-2. A1 Switch Control Voltages . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
4-3. A2 Switch Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28
4-4. Typical Conversion/Insertion Loss Values .. .. .. .. .. .. .. .. .. 4-30
4-5. Sine Wave Values at A10U5 Pin 7 . . . . . . . . . . . . . . . . . . . . . . 4-42
4-6. Waveforms at A10U2A . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-42
4-7. Waveforms at A10U5A . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-42
5-1. Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . 5-1
5-2. Tune + Span ET Parts Listing (1.5 V/GHz) . . . . . . . . . . . . . . . . . . 5-5
10-1. HP 70908A RF Section Cables .. .. .. .. .. .. .. .. .. .. .. . 10-2
10-2. Overall Parts Identication Listing, Front View .... .. .. .. .. .. . 10-5
10-3. Overall Parts Identication Listing, Rear View . . . . . . . . . . . . . . . . 10-6
10-4. Overall Parts Identication Listing, Top View .. .. .. .. .. .. .. .. 10-7
10-5. Overall Parts Identication Listing, Bottom View .. .. .. .. .. .. .. 10-8
10-6. Overall Parts Identication Listing, Side View . . . . . . . . . . . . . . . . 10-9
10-7. Overall Parts Identication Listing, Left Side View, and Cover Removed . . . . 10-11
10-8. Overall Parts Identication Listing, Right Side View, A10 Power Supply/Driver
Facing Down, and Cover Removed . . . . . . . . . . . . . . . . . . . . 10-14
Contents-9
1
Getting Started
This chapter provides information to help get you started so that your RF section is serviced
properly.
This chapter answers the questions \What Is Servicing?" and \When Is Servicing Needed?". It
then describes the procedures used to return your RF section to Hewlett-Packard for servicing.
Getting Started 1-1
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