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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
Hewlett-Packard's former test and measurement, semiconductor products and chemical
analysis businesses are now part of Agilent Technologies. We have made no changes to
this manual copy. The HP 70908A referred to in this document is now the Agilent
70908A.
About this Manual
We’ve added this manual to the Agilent website in an effort to help you support your
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or contain dated information, and the scan quality may not be ideal. If we find a better
copy in the future, we will add it to the Agilent website.
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Search for the model number of this product, and the resulting product page will guide
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if no repair parts are needed, but no other support from Agilent is available
Page 2
Service Guide
HP 70908A
RF Section
ABCDE
HP P art No . 70908-90193
Printed in US A April 1997
Edition A.0.0
Page 3
Notice
The information contained in this document is subject to change without notice .
Hewlett-P ackard 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-P ackard shall not be liable for errors contained herein or for incidental or
consequential damages in connection with the furnishing, performance , o r 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 T echnical Data and Computer Software clause at
DF ARS 252.227-7013 for DOD agencies , and subparagraphs (c) (1) and (c) (2) of the Commercial
Computer Software Restricted Rights clause at F AR 52.227-19 for other agencies .
c
Copyright Hewlett-P ackard Company 1988, 1997
All Rights Reserved. Reproduction, adaptation, or translation without prior written permission
is prohibited, except as allowed under the copyright laws
1400 F ountaingrove P arkway , Santa Rosa, CA 95403-1799, USA
.
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Certication
Hewlett-P ackard Company certies that this product met its published specications at the
time of shipment from the factory . Hewlett-P ackard further certies that its calibration
measurements are traceable to the United States National Institute of Standards and
T echnology , t o the extent allowed by the Institute's calibration facility , and to the calibration
facilities of other International Standards Organization members .
W arranty
This Hewlett-P ackard 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-P ackard Company will, at its option, either repair or replace products which prove to
be defective .
F or warranty service or repair , this product must be returned to a service facility designated by
Hewlett-P ackard. Buyer shall prepay shipping charges to Hewlett-P ackard and Hewlett-P ackard
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-P ackard from another
country .
Hewlett-P ackard warrants that its software and rmware designated by Hewlett-P
use with an instrument will execute its programming instructions when properly installed on
that instrument. Hewlett-P ackard does not warrant that the operation of the instrument, or
software , o r rmware will be uninterrupted or error-free .
Limit a tion of W arranty
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 W ARRANTY IS EXPRESSED OR IMPLIED . HEWLETT-P A CKARD SPECIFICALL Y
DISCLAIMS THE IMPLIED W ARRANTIES OF MERCHANT ABILITY AND FITNESS FOR A
P ARTICULAR PURPOSE.
Ex clusive Remedies
THE REMEDIES PRO VIDED HEREIN ARE BUYER'S SOLE AND EXCLUSIVE REMEDIES.
HEWLETT-P A CKARD SHALL NOT BE LIABLE FOR ANY DIRECT , INDIRECT , SPECIAL,
INCIDENT AL, OR CONSEQUENTIAL D AMA GES, WHETHER B ASED ON CONTRA CT , TORT ,
OR ANY OTHER LEGAL THEORY .
Assistance
ackard for
Product maintenance agreements and other customer assistance agreements are available for
Hewlett-P ackard products .
F or any assistance , contact your nearest Hewlett-P ackard Sales and Service Oce .
iii
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Safety Symbols
The following safety symbols are used throughout this manual. F amiliarize yourself with each
of the symbols and its meaning before operating this instrument.
The
CA UTION
W ARNING
D ANGER
CA UTION
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
until the indicated conditions are fully understood and met.
The
W ARNING
which, if not correctly performed or adhered to , could result in injury
to the user . D o not proceed beyond a
conditions are fully understood and met.
The
D ANGER
reader of a procedure which, if not correctly performed or adhered to ,
could result in injury or loss of life . D o not proceed beyond a
sign until the indicated conditions are fully understood and met.
sign denotes a hazard. It calls attention to a procedure which, if
CA UTION
sign denotes a hazard. It calls attention to a procedure
W ARNING
sign denotes an imminent hazard to people . I t warns the
sign until the indicated
sign
D ANGER
iv
Page 6
General Safety Considerations
W ARNING
W ARNING
The instructions in this document are for use by qualied personnel
only .T o 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.
F or 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.
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
F ailure 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
Page 7
Servicing at a Glance
vi
Page 8
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 , a n 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 P ackages
Module verication software disks .
T ools 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 . I f possible ,
work at a static-safe work station. F or further information, refer to \Preparing a Static-Safe
W ork Station " i n Chapter 4.
vii
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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 .F or 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 . I t 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 . I t 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 i s 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
information on how to use this module verication software , refer to Chapter 2.
, you must become familiar with module verication software .F or
viii
Page 10
Contents
1. Getting Started
What Is Servicing? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
When Is Servicing Needed? . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
If Y ou W ant Hewlett-P ackard to Service Y our RF Section . . . . . . . . . . . . 1-3
Determining the Serial Number of Y our RF Section . . . . . . . . . . . . . . 1-3
Returning Y our RF Section for Service .. .. .. .. .. .. .. .. .. . 1-5
2. Module V erication Software
Computer Compatibility . . . ... .. .. .. .. .. .. .. .. .. .. . 2-2
Alternate Key Labels .. .. .. .. .. .. .. .. .. .. .. .. .. . 2-2
Computer Language Compatibility .. .. .. .. .. ... .. .. .. ..
Printer Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Conguring the Hardware .. .. .. .. .. .. .. .. .. .. .. .. ..
Installing Module V erication Software .. .. .. .. ... .. .. .. .. .
Module V erication Software Overview . . . . . . . . . . . . . . . . . . . .
T esting Multiple Modules . . . . . . . . . . . . . . . . . . . . . . . . . .
Error Messages or W arnings Dened .. .. .. .. .. .. .. . . . . . .
Final T ests Dened . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Single T ests Dened .. .. .. .. .. .. .. .. .. . . . . . . . . . .
Printing T est Results . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Menus .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. ..
Menu Structure .. .. .. .. .. .. .. .. .. .. ... .. .. .. .
Edit and Command Screen Menus . . . . . . . . . . . . . . . . . . . . . .
Edit Screen Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Command Screen Menus . . . . . . . . . . . . . . . . . . . . . . . . .
Cursor Keys and Menu Selections . . . . . . . . . . . . . . . . . . . . .
Main Menu .. .. .. .. .. .. .. ... .. .. .. .. .. .. .. . 2-11
Mass Storage Menu .. .. .. .. .. .. .. .. .. .. .. . . . . . . 2-11
Mass Storage Menu Edit Screen . . . . . . . . . . . . . . . . . . . . . . 2-12
Mass Storage Menu Command Screen . . . . . . . . . . . . . . . . . . . 2-12
P arameter Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
P arameter Menu Edit Screen . . . . . . . . . . . . . . . . . . . . . . .
P arameter Menu Command Screen .. .. .. .. .. .. .. .. .. ..
Equipment Menu .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
Equipment Menu Edit Screen . . . . . . . . . . . . . . . . . . . . . . .
Equipment Menu Command Screen . . . . . . . . . . . . . . . . . . . .
Edit Calibration Data .. .. .. .. .. .. .. .. .. . . . . . . . . .
Edit Calibration Data Edit Screen . . . . . . . . . . . . . . . . . . . . .
Edit Calibration Data Command Screen . . . . . . . . . . . . . . . . . .
HP-MSIB A ddress Menu .. .. .. .. .. ... .. .. .. .. .. .. . 2-16
T est Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
T est Menu Command Screen .. .. .. .. .. .. .. .. .. .. .. .
Error and Status Messages .. .. .. .. .. .. .. .. .. ... .. .. .
2-2
2-3
2-4
2-5
2-7
2-7
2-7
2-7
2-8
2-8
2-9
2-9
2-9
2-9
2-9
2-10
2-12
2-13
2-13
2-14
2-14
2-15
2-16
2-16
2-17
2-23
Contents-1
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3. Before Extensive Servicing
If the System's P ower-On Self T est F ails . . . . . . . . . . . . . . . . . . . . 3-2
If Y our HP 70908A RF Section is P owered On But Not Responding Correctly . . . 3-4
If One or More Modules' Error Indicator is Flashing . ... .. .. .. .. .. 3-5
4. Troubleshooting
Preparing a Static-Safe W ork Station .. .. .. .. .. .. .. .. .. .. . 4-2
If Operating Errors Messages (2000{2999) Occur . . . . . . . . . . . . . . . . 4-4
If Hardware Error Messages (7000{7999) Occur .. .. .. .. .. .. .. .. 4-5
If Y ou Have A djustment Procedure F ailures .. .. .. .. .. .. .. .. .. 4-9
If 2nd Converter F ails .. .. ... .. .. .. .. .. .. .. .. .. .. . 4-11
If Y ou Have A djustments Procedure F ailures . . . . . . . . . . . . . . . . . . 4-15
If Y ou Have V erication T est F ailures .. .. .. .. .. .. ... .. .. .. 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 P ower Supply/Driver . . . . . . . . . . . . . . . . . 4-38
Troubleshooting the A11 Last Converter .. .. .. .. .. .. .. .. .. . 4-46
Troubleshooting the A12 Controller . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting the A13 ALC/Bias .. .. .. .. .. .. .. .. .. .. ..
Troubleshooting the A15 RF 1st Converter .. .. .. .. .. .. .. .. ..
The Troubleshooting T ool Program . . . . . ... .. .. .. .. .. .. ..
P erforming Related A djustments and V erication T ests . . . . . . . . . . . . .
Overall Block Diagram of RF Section .. .. .. .. .. .. .. ... .. ..
4-47
4-48
4-49
4-50
4-51
4-55
5. Recommended T est Equipment T ables
Specialized T est Equipment ET . . . . . . . . . . . . . . . . . . . . . . . .
6. System Calibration
External Frequency Reference .. .. ... .. .. .. .. .. .. .. .. .
T est System Calibration .. .. .. .. ... .. .. .. .. .. .. .. ..
7. A djustment Procedures
Before Y ou Make A djustments .. .. .. .. .. .. ... .. .. .. .. . 7-2
Overall A djustment Equipment Setup . . . . . . . . . . . . . . . . . . . . . 7-3
A djustment 01. LOLA Gate Bias .. .. .. .. .. .. .. .. .. .. .. . 7-4
A djustment 02. Multiplier Gate Bias .. .. .. .. .. .. .. .. .. .. . 7-6
A djustment 03. Reference V oltage .. .. .. .. .. .. .. .. .. .. .. 7-8
A djustment 04. LOLA P ower Out . . . . . . . . . . . . . . . . . . . . . . .
A djustment 05. LOLA Tuned Filter . . . . . . . . . . . . . . . . . . . . . .
A djustment 06. SYTFMD Oset Coil .. .. .. .. .. .. .. .. .. .. .
A djustment 07. SYTFMD Main Coil Preset . . . . . . . . . . . . . . . . . . .
A djustment 08. Multiplier P ower Leveling . . . . . . . . . . . . . . . . . . .
A djustment 09. SYTFMD Main Coil Alignment . . . . . . . . . . . . . . . . .
A djustment 10. V CO Tune-Line V oltage . . . . . . . . . . . . . . . . . . . .
A djustment 11. V CO 2nd LO Frequency/Amplitude . . . . . ... .. .. .. 7-30
A djustment 12. 2nd Converter LO F eedthrough .. .. .. .. .. .. .. .. 7-32
A djustment 13. Sampler IF Out DC . . . . . . . . . . . . . . . . . . . . . . 7-34
A djustment 14. Sampler IF Out A C . . ... .. .. .. .. .. .. .. .. .
A djustment 15. Search Oscillator Duty Cycle and P
A djustment 16. Search Oscillator Square W ave Min/Max .. ... .. .. .. .
A djustment 17. Search Oscillator Tune Line P eak .. .. .. .. .. .. .. .
A djustment 18. Phase Lock Check .. ... .. .. .. .. .. .. .. .. .
eriod . . . . . . . . . . . .
5-3
6-2
6-6
7-10
7-12
7-14
7-17
7-20
7-25
7-28
7-36
7-38
7-40
7-42
7-44
Contents-2
Page 12
A djustment 19. V CO Tune Range Preliminary Check . . . . . . . . . . . . . . 7-46
A djustment 20. Lock Range Measurement . . . . . . . . . . . . . . . . . . . 7-48
A djustment 21. Mixer Bias . . . . . . . . . . . . . . . . . . . . . . . . . . 7-50
A djustment 22. 2nd Converter Bandpass Filter Tune . . . . . . . . . . . . . . 7-52
A djustment 23. V CO Tune Range Final .. .. .. .. .. .. .. .. .. .. 7-55
A djustment 24. Last Converter Bandpass Filter .. .. ... .. .. .. .. . 7-57
A djustment 25. Noise Figure Last Converter . . . . . . . . . . . . . . . . . . 7-60
A djustment 26. Noise Figure 2nd Converter . . . . . . . . . . . . . . . . . . 7-62
A djustment 27. 21.4 MHz IF Frequency Response .. .. .. .. .. .. .. . 7-64
8. Module V erication T ests
Before Y ou Begin T esting . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
Overall T est Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
T est 01. Flatness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
T est 02. Low Frequency Flatness < 1 0 M H z .. .. .. .. .. .. .. .. .. 8-6
T est 03. Attenuator A ccuracy .. .. .. .. .. .. .. .. .. .. .. .. 8-8
T est 04. Front P anel LEDs .. .. .. .. .. .. .. .. .. . . . . . . . . 8-10
T est 05. 10.7 MHz Rejection .. .. .. .. .. .. .. .. .. .. .. .. . 8-12
T est 06. F eedthrough Out 21.4 MHz P ort .. .. ... .. .. .. .. .. .. 8-14
T est 07. Harmonics Out 21.4 MHz P ort . . . ... .. .. .. .. .. .. .. 8-16
T est 08. Residual Emissions Out 21.4 MHz P ort . ... .. .. .. .. .. ..
T est 09. Image Rejection . . . . . . . . . . . . . . . . . . . . . . . . . . .
T est 10. IF Rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T est 11. 2nd Converter Startup . . . . . . . . . . . . . . . . . . . . . . . .
T est 12. IF Sub-Harmonics .. .. .. .. .. .. .. .. .. .. .. .. ..
T est 13. Residual Responses .. .. .. .. .. .. .. . . . . . . . . . . .
T est 14. Miscellaneous Residual Responses .. .. .. .. .. .. .. .. ..
T est 15. 321.4 MHz IF Out Frequency Response .. .. .. .. .. .. .. ..
T est 16. 21.4 MHz IF Frequency Response . . . . . . . . . . . . . . . . . . .
T est 17. Step Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T est 18. Gain Compression . . . . . . . . . . . . . . . . . . . . . . . . . .
T est 19. A ux LO P ower and Harmonics .. .. .. .. .. .. .. .. .. ..
T est 20. Diagnostics .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
T est 21. LO Input Amplitude Range . . . . . . . . . . . . . . . . . . . . . .
T est 22. RF Input Emissions .. .. .. .. .. .. ... .. .. .. .. ..
T est 23. RF Input Return Loss .. .. .. .. .. .. .. .. .. .. .. .. 8-48
T est 24. LO Output Return Loss .. ... .. .. .. .. .. .. .. .. .. 8-50
T est 25. LO Input Return Loss .. .. .. .. .. .. .. .. .. .. .. .. 8-52
T est 26. Reference Return Loss . . . . . . . . . . . . . . . . . . . . . . . . 8-54
T est 27. Wide IF Output Return Loss .. .. .. .. .. .. .. .. .. .. . 8-56
T est 28. Narrow IF Output Return Loss . . . . . . . . . . . . . . . . . . . .
T est 29. Noise Figure . . . . . . . . . ... .. .. .. .. .. .. .. ..
8-18
8-20
8-22
8-24
8-25
8-27
8-29
8-31
8-33
8-35
8-37
8-39
8-41
8-45
8-47
8-58
8-60
9. Replacing Major Assemblies
Module Cover . . . . . . . . . ... .. .. .. .. .. .. .. .. .. ..
Front P anel .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
Rear P anel .. .. ... .. .. .. .. .. .. .. .. .. .. .. .. ..
Bandpass Filter . . . . . . . . . . . . . ... .. .. .. .. .. .. .. .
A1 Leveling Amplier . . . . . ... .. .. .. .. .. .. .. .. .. .. 9-12
A2 LO Multiplier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-14
A3 SYTFMD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A4 Input Attenuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A5 V CO Sampler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A6 Isolator .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. ..
A7 2nd Mixer . . . . . . . . . ... .. .. .. .. .. .. .. .. .. ..
9-2
9-3
9-6
9-9
9-16
9-18
9-21
9-25
9-26
Contents-3
Page 13
A8 321.4 MHz Matching Network . . . . . . . . . . . . . . . . . . . . . . . 9-28
A9 2nd Converter PLL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-30
A10 P ower Supply/Driver .. .. .. .. .. .. .. .. .. .. .. .. .. 9-33
A11 Last Converter .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 9-35
A12 Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-38
A13 ALC/Bias . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-39
A14 Front P anel Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-40
A15 RF 1st Converter .. .. .. .. .. .. .. .. .. .. .. .. .. .. 9-41
A16 Low P ass Filter .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 9-43
A17 Low P ass Filter .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 9-45
10. Overall P arts Identication Drawings
Major Cables .. .. .. .. .. .. .. .. ... .. .. .. .. .. .. . 10-2
Front View Identication . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5
Rear View Identication .. .. .. .. .. .. .. .. .. .. .. .. .. . 10-6
T op 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
Page 14
Figures
1-1. Typical Serial Number Label .. .. .. .. .. .. .. .. .. .. .. .. 1-3
2-1. Main Menu Softkeys . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
2-2. Mass Storage Menu and P arameter Menu Softkeys . . . . . . . . . . . . . . 2-20
2-3. Equipment Menu and HP-MSIB Map Screen Menu Softkeys . . . . . . . . . . 2-21
2-4. T est Menu Softkeys .. .. .. .. .. .. .. .. .. .. .. .. .. .. 2-22
3-1. Line V oltage Selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3-2. Line Fuse Removal and Replacement .. .. .. .. .. .. .. .. .. .. 3-2
4-1. Static-Safe W ork Station .. .. .. .. .. .. .. .. .. .. .. .. .. 4-2
4-2. Notch-Filter W aveform . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27
4-3. Bandpass-Filter Drive W aveform .. .. .. .. .. .. .. .. ... .. . 4-29
4-4. T est Connector Construction .. .. .. .. .. .. .. .. .. .. .. .. 4-32
4-5. Discriminator Output W aveform .. .. .. .. .. .. .. .. .. ... .
4-6. Signal at A10Q1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-7. Linearity Compensation W aveform .. .. .. .. .. .. .. .. .. . . .
4-8. Notch Filter W aveform . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-9. Overall Block Diagram of RF Section .. .. .. .. .. .. .. .. .. ..
5-1. Typical Microwave Source A djustment Setup Using Tune + Span ET .. .. . 5-3
5-2. Tune + Span ET Schematic .. .. .. .. .. .. .. .. .. .. .. ..
5-3. Tune + Span ET Component Locations .. .. .. .. .. .. . . . . . . .
5-4. Tune + Span ET Ramp Converter A djustment Setup . . . . . . . . . . . . .
5-5. Equipment Setup for Oset-Coil-Current ET . . . . . . . . . . . . . . . . .
6-1. Preferred Frequency Reference Connections .. .. .. .. .. .. .. ..
6-2. Using an HP 70310A Precision Frequency Reference and a House Standard
6-3. Using an HP 70310A Precision Frequency Reference . . . . . . . . . . . . .
6-4. Using an HP 8566B Spectrum Analyzer and a House Standard
6-5. Synthesized Source Calibration T est Setup . . . . . . . . . . . . . . . . . .
6-6. Microwave Source Calibration T est Setup .. .. .. .. .. .. .. .. .. 6-7
6-7. Spectrum Analyzer Reference Calibration T est Setup . . . . . . . . . . . . . 6-8
6-8. Spectrum Analyzer IF Calibration T est Setup .. .. .. .. .. .. .. .. 6-8
6-9. Spectrum Analyzer RF Calibration T est Setup .. .. .. .. .. .. .. .. 6-9
6-10. Flatness Calibration and V erication T est Setup .. .. .. .. .. .. .. . 6-10
6-11. Return Loss T est Block Calibration Setup .. ... .. .. .. .. .. .. .
6-12. Noise Figure Meter Calibration T est Setup . . . . . . . . . . . . . . . . . .
7-1. Overall A djustment Equipment Setup . . . . . . . . . . . . . . . . . . . .
7-2. Equipment Setup for A djustment 01. LOLA Gate Bias .. .. .. .. .. .. 7-4
7-3. Locations for A djustment 01. LOLA Gate Bias . . . . . . . . . . . . . . . .
7-4. Equipment Setup for A djustment 02. Multiplier Gate Bias .. .. .. .. .. 7-6
7-5. Locations for A djustment 02. Multiplier Gate Bias . . . . . . . . . . . . . .
7-6. Equipment Setup for A djustment 03. Reference V oltage .. .. ... .. .. 7-8
7-7. Locations for A djustment 03. Reference V oltage . . . . . . . . . . . . . . . 7-8
7-8. Equipment Setup for A djustment 04. LOLA P ower Out . . . . . . . . . . . . 7-10
7-9. Locations for A djustment 04. LOLA P ower Out .. .. .. .. .. .. .. . 7-10
7-10. Equipment Setup for A djustment 05. LOLA Tuned Filter . . . . . . . . . . .
7-11. Locations for A djustment 05. LOLA Tuned Filter ... .. .. .. .. .. .
7-12. Equipment Setup for A djustment 06. SYTFMD Oset Coil .. .. .. .. ..
7-13. Locations for A djustment 06. SYTFMD Oset Coil . . . . . . . . . . . . . .
.. .. .. .. 6-5
.. 6-4
4-33
4-40
4-43
4-44
4-55
5-4
5-4
5-6
5-7
6-3
6-4
6-6
6-12
6-13
7-3
7-4
7-6
7-12
7-12
7-14
7-14
Contents-5
Page 15
7-14. Equipment Setup for A djustment 07. SYTFMD Main Coil Preset .. .. .. . 7-17
7-15. Locations for A djustment 07. SYTFMD Main Coil Preset .. .. .. .. .. . 7-17
7-16. Equipment Setup for A djustment 08. Multiplier P ower Leveling .. .. .. . 7-20
7-17. Locations for A djustment 08. Multiplier P ower Leveling . ... .. .. .. . 7-21
7-18. Locations of MUT LEVEL LED and Connect P oints for A djustment 08. Multiplier
P ower Leveling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-21
7-19. Equipment Setup for A djustment 09. SYTFMD Main Coil Alignment .. .. . 7-25
7-20. Locations for A djustment 09. SYTFMD Main Coil Alignment .. .. .. .. . 7-25
7-21. Equipment Setup for A djustment 10. V CO Tune-Line V oltage . . . . . . . . . 7-28
7-22. Locations for A djustment 10. V CO Tune-Line V oltage .. .. .. .. .. .. 7-28
7-23. Equipment Setup for A djustment 11. V CO 2nd LO Frequency/Amplitude .. . 7-30
7-24. Locations for A djustment 11. V CO 2nd LO Frequency/Amplitude . . . . . . . 7-30
7-25. Equipment Setup for A djustment 12. 2nd Converter LO F eedthrough . . . . . 7-32
7-26. Locations for A djustment 12. 2nd Converter LO F eedthrough .. .. .. .. 7-32
7-27. Equipment Setup for A djustment 13. Sampler IF Out DC . . . . . . . . . . . 7-34
7-28. Locations for A djustment 13. Sampler IF Out DC .. .. .. .. .. .. .. 7-34
7-29. Equipment Setup for A djustment 14. Sampler IF Out A C . .. .. .. .. .. 7-36
7-30. Locations for A djustment 14. Sampler IF Out A C .. .. .. .. .. .. .. 7-36
7-31. Equipment Setup for A djustment 15. Search Oscillator Duty Cycle and P eriod . 7-38
7-32. Locations for A djustment 15. Search Oscillator Duty Cycle and P eriod .. .. 7-38
7-33. Equipment Setup for A djustment 16. Search Oscillator Square W ave Min/Max . 7-40
7-34. Locations for A djustment 16. Search Oscillator Square W ave Min/Max . . . . . 7-40
7-35. Equipment Setup for A djustment 17. Search Oscillator Tune Line P e a k .. .. 7-42
7-36. Locations for A djustment 17. Search Oscillator Tune Line P e a k .. .. .. ..
7-37. Equipment Setup for A djustment 18. Phase Lock Check .. .. .. .. .. .
7-38. Locations for A djustment 18. Phase Lock Check . . . . . . . . . . . . . . .
7-39. Equipment Setup for A djustment 19. V CO Tune Range Preliminary Check . . . 7-46
7-40. Locations for A djustment 19. V CO Tune Range Preliminary Check .. ... . 7-46
7-41. Equipment Setup for A djustment 20. Lock Range Measurement .. .. .. . 7-48
7-42. Locations for A djustment 20. Lock Range Measurement .. .. .. .. .. .
7-43. Equipment Setup for A djustment 21. Mixer Bias . . . . . . . . . . . . . . .
7-44. Locations for A djustment 21. Mixer Bias .. .. .. .. .. .. .. .. ..
7-45. Equipment Setup for A djustment 22. 2nd Converter Bandpass Filter Tune .. 7-52
7-46. Locations for A djustment 22. 2nd Converter Bandpass Filter Tune .. .. .. 7-53
7-47. Locations for A djustment 22. 2nd Converter Bandpass Filter Tune .. .. .. 7-54
7-48. Equipment Setup for A djustment 23. V CO Tune Range Final . . . . . . . . . 7-55
7-49. Locations for A djustment 23. V CO Tune Range Final . . . . . . . . . . . . . 7-56
7-50. Equipment Setup for A djustment 24. Last Converter Bandpass Filter . . . . . 7-57
7-51. Locations for A djustment 24. Last Converter Bandpass Filter . . . . . . . . . 7-58
7-52. Equipment Setup for A djustment 25. Noise Figure Last Converter .. .. .. 7-60
7-53. Locations for A djustment 25. Noise Figure Last Converter .. .. .. .. ..
7-54. Equipment Setup for A djustment 26. Noise Figure 2nd Converter .. .. .. 7-62
7-55. Locations for A djustment 26. Noise Figure 2nd Converter .. .. .. .. ..
7-56. Equipment Setup for A djustment 27. 21.4 MHz IF Frequency Response . . . . 7-64
8-1. Overall RF Section V erication T est Setup . . . . . . . . . . . . . . . . . .
8-2. Equipment Setup for T est 01. Flatness .. .. .. .. .. .. . . . . . . .
8-3. Equipment Setup for T est 02. Low Frequency Flatness < 1 0 M H z .. .. .. . 8-6
8-4. Equipment Setup for T est 03. Attenuator A ccuracy .. .. .. .. .. .. . 8-8
8-5. Equipment Setup for T est 04. Front P anel LEDs . . . . . . . . . . . . . . . 8-10
8-6. Equipment Setup for T est 05. 10.7 MHz Rejection . . . . . ... .. .. .. 8-12
8-7. Equipment Setup for T est 06. F eedthrough Out 21.4 MHz P ort .. .. .. ..
8-8. Equipment Setup for T est 07. Harmonics Out 21.4 MHz P ort .. .. .. .. .
8-9. Equipment Setup for T est 08. Residual Emissions Out 21.4 MHz P ort .. .. . 8-18
8-10. Equipment Setup for T est 09. Image Rejection . . . . . . . . . . . . . . . .
8-11. Equipment Setup of T est 10. IF Rejection . . . . . . . . . . . . . . . . . .
7-42
7-44
7-44
7-48
7-50
7-50
7-60
7-62
8-3
8-4
8-14
8-16
8-20
8-22
Contents-6
Page 16
8-12. Equipment Setup for T est 11. 2nd Converter Startup .. .. .. .. .. .. 8-24
8-13. Equipment Setup for T est 12. IF Sub-Harmonics . . . . . . . . . . . . . . . 8-25
8-14. Equipment Setup for T est 13. Residual Responses .. .. .. ... .. .. . 8-27
8-15. Equipment Setup for T est 14. Miscellaneous Residual Responses .. .. .. . 8-29
8-16. Equipment Setup for T est 15. 321.4 MHz IF Out Frequency Response . . . . . 8-31
8-17. Equipment Setup for T est 16. 21.4 MHz IF Frequency Response .. .. . . . 8-33
8-18. Equipment Setup for T est 17. Step Gain . . . . . . . . . . . . . . . . . . . 8-35
8-19. Equipment Setup for T est 18. Gain Compression . . . . . . . . . . . . . . . 8-37
8-20. Equipment Setup for T est 19. A ux LO P ower and Harmonics . . . . . . . . . 8-39
8-21. Equipment Setup for T est 20. Diagnostics (1 of 2) .. .. .. .. .. .. .. 8-41
8-22. Equipment Setup for T est 20. Diagnostics (2 of 2) .. .. .. .. .. .. .. 8-42
8-23. Equipment Setup for T est 21. LO Input Amplitude Range .. .. .. .. .. 8-45
8-24. Equipment Setup for T est 22. RF Input Emissions . . . . . ... .. .. .. 8-47
8-25. Equipment Setup for T est 23. RF Input Return Loss .. .. .. .. .. .. . 8-48
8-26. Equipment Setup for T est 24. LO Output Return Loss .. .. .. .. .. .. 8-50
8-27. Equipment Setup for T est 25. LO Input Return Loss .. .. .. .. .. .. . 8-52
8-28. Equipment Setup for T est 26. Reference Return Loss .. .. .. .. .. .. 8-54
8-29. Equipment Setup for T est 27. Wide IF Output Return Loss . . . . . . . . . . 8-56
8-30. Equipment Setup for T est 28. Narrow IF Output Return Loss . . . . . . . . . 8-58
8-31. Equipment Setup for T est 29. Noise Figure .. ... .. .. .. .. .. .. 8-60
9-1. Module Cover Removal/Replacement .. .. .. .. .. .. .. .. .. ..
9-2. Front P anel Removal/Replacement (1 of 2) .. .. .. .. .. .. .. .. .
9-3. Front P anel Removal/Replacement (2 of 2) .. .. .. .. .. .. .. .. .
9-4. Rear P anel Removal/Replacement (1 or 2) . . . . . . . . . . . . . . . . . .
9-5. Rear P anel Removal/Replacement (2 or 2) . . . . . . . . . . . . . . . . . .
9-6. Bandpass Filter Removal/Replacement (1 or 2) . . . . . . . . . . . . . . . .
9-7. Bandpass Filter Removal/Replacement (2 or 2) . . . . . . . . . . . . . . . .
9-8. A1 Leveling Amplier Removal/Replacement .. .. .. .. .. .. .. ..
9-9. A2 LO Multiplier Removal/Replacement . . . . . . . . . . . . . . . . . . .
9-10. A3 SYTFMD Removal/Replacement .. .. .. .. .. .. .. .. .. .. .
9-11. A4 Input Attenuator Removal/Replacement (1 of 2) . . . ... .. .. .. .
9-12. A4 Input Attenuator Removal/Replacement (2 of 2) . . . ... .. .. .. .
9-13. A5 V CO Sampler Removal/Replacement (1 of 3) . . . . . ... .. .. .. .
9-14. A5 V CO Sampler Removal/Replacement (2 of 3) . . . . . ... .. .. .. .
9-15. A5 V CO Sampler Removal/Replacement (3 of 3) . . . . . ... .. .. .. .
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 P ower Supply/Driver Removal/Replacement . . . . . . . . . . . . . . .
9-22. A11 Last Converter Removal/Replacement (1 of 2) . . . . . . . . . . . . . .
9-23. A11 Last Converter Removal/Replacement (2 of 2) . . . . . . . . . . . . . .
9-24. A12 Controller Removal/Replacement . . . . . . . . . . . . . . . . . . . .
9-25. A13 ALC/Bias Removal/Replacement .. .. .. .. .. .. .. .. .. ..
9-26. A14 Front P anel Board Removal/Replacement . . . . . . . . . . . . . . . .
9-27. A15 RF 1st Converter Removal/Replacement .. .. .. .. .. .. .. .. 9-42
9-28. A16 Low P ass Filter Removal/Replacement .. .. .. .. .. .. .. .. .
9-29. A17 Low P ass Filter Removal/Replacement .. .. .. .. .. .. .. .. . 9-46
10-1. Overall P arts Identication Drawing, Major Cables (1 of 3) .. .. .. .. .. 10-3
10-2. Overall P arts Identication Drawing, Major Cables (2 of 3)
10-3. Overall P arts Identication Drawing, Major Cables (3 of 3)
10-4. Overall P arts Identication Drawing, Front View .. .. .. ... .. .. .
10-5. Overall P arts Identication Drawing, Rear View . . . . . . . . . . . . . . .
10-6. Overall P arts Identication Drawing, T op View .. ... .. .. .. .. ..
.. .. .. .. ..
.. .. .. .. ..
9-2
9-4
9-5
9-7
9-8
9-10
9-11
9-13
9-15
9-17
9-19
9-20
9-22
9-23
9-24
9-34
9-36
9-37
9-38
9-39
9-40
9-44
10-3
10-4
10-5
10-6
10-7
Contents-7
Page 17
10-7. Overall P arts Identication Drawing, Bottom View . . . . . . . . . . . . . . 10-8
10-8. Overall P arts Identication Drawing, Side View .. .. .. .. .. .. .. . 10-10
10-9. Overall P arts Identication Drawing, Left Side View , and Cover Removed (1 of 2) 10-12
10-10. Overall P arts Identication Drawing, Left Side View , and Cover Removed (2 of 2) 10-13
10-11. Overall P arts Identication Listing, Right Side View , A10 P ower Supply/Driver
F acing Down, and Cover Removed . . . . . . . . . . . . . . . . . . . . 10-15
Contents-8
Page 18
T ables
1-1. Hewlett-P ackard Sales and Service Oces . . . . . . . . . . . . . . . . . . 1-4
1-2. P ackaging for a 2/8 Module (RF Section ) . . . . . . . . . . . . . . . . . . . 1-6
3-1. Default HP-MSIB A ddress Map .. .. .. .. .. .. .. .. .. .. .. . 3-3
4-1. Static-Safe ESD A ccessories .. .. .. .. .. .. .. . . . . . . . . . . 4-3
4-2. A1 Switch Control V oltages . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
4-3. A2 Switch Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28
4-4. Typical Conversion/Insertion Loss V alues .. .. .. .. .. .. .. .. .. 4-30
4-5. Sine W ave V alues at A10U5 Pin 7 . . . . . . . . . . . . . . . . . . . . . . 4-42
4-6. W aveforms at A10U2A . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-42
4-7. W aveforms at A10U5A . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-42
5-1. Recommended T est Equipment . . . . . . . . . . . . . . . . . . . . . . . 5-1
5-2. Tune + Span ET P arts Listing (1.5 V/GHz) . . . . . . . . . . . . . . . . . .
10-1. HP 70908A RF Section Cables .. .. .. .. .. .. .. .. .. .. .. .
10-2. Overall P arts Identication Listing, Front View .. .. .. .. .. .. .. .
10-3. Overall P arts Identication Listing, Rear View . . . . . . . . . . . . . . . .
10-4. Overall P arts Identication Listing, T op View .. .. .. .. .. .. .. ..
10-5. Overall P arts Identication Listing, Bottom View .. .. .. .. .. .. ..
10-6. Overall P arts Identication Listing, Side View . . . . . . . . . . . . . . . .
10-7. Overall P arts Identication Listing, Left Side View , and Cover Removed . . . . 10-11
10-8. Overall P arts Identication Listing, Right Side View , A10 P ower Supply/Driver
F acing Down, and Cover Removed . . . . . . . . . . . . . . . . . . . .
5-5
10-2
10-5
10-6
10-7
10-8
10-9
10-14
Contents-9
Page 19
Page 20
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-P ackard for servicing.
Getting Started 1-1
Page 21
What Is Servicing?
Servicing includes testing, adjusting, troubleshooting, and repairing.
There are dierent categories of testing available . These categories are module verication
tests , system verication of operation tests , and system performance tests .
Module
V erication T ests
System
V erication of
Operation T ests
System
P erformance
T ests
This service guide provides information related to testing, adjusting, troubleshooting, and
repairing your RF section ; i t also provides information on module verication tests . These sets
of tests are used during servicing.
F or information related to system verication of operation tests
Spectrum Analyzer Installation and V erication Manual
system performance tests , refer to the documentation for HP 11990A system performance test
software .
When Is Servicing Needed?
Servicing is needed:
Module verication tests are used to test modules so that when assembled
into a system, the system meets the system's specications . These sets of
tests are used during servicing.
System verication of operation tests are used to verify the proper
operation of an instrument and to verify that the instrument meets
approximately 80% of its measurement related specications . These sets of
tests are subsets of system performance tests .
System performance tests are used to verify the proper operation of a
complete modular measurement system (MMS) to full system specications .
, refer to the
, and for information related to
HP 70000 Modular
if error messages are displayed on your HP 70000 Series display
if an ERROR LED or F A UL T LED is on
to perform repairs or adjustments or both
to verify the correct operation of your RF section
or , i f applicable , when upgrading rmware
If you determine that your RF section needs servicing, you can perform the servicing yourself
using the information in this manual. If your RF section is still in warranty , o r i f you do not
wish to perform the servicing yourself, return your RF section to a Hewlett-P ackard service
center .
1-2 Getting Started
Page 22
If Y ou W ant Hewlett-P ackard to Service Y our RF Section
Before calling Hewlett-P ackard or returning your RF section for service , please read your
warranty information. W arranty information is printed at the front of this service guide .
In any correspondence or telephone conversations , refer to the RF section by its full model
number and full serial number . With this information, the Hewlett-P ackard representative can
determine whether your unit is still within its warranty period.
Determining the Serial Number of Y our RF Section
When a module is manufactured by Hewlett-P ackard, it is given a unique serial number . This
serial number is attached to a label on the front frame or front panel of the module . A serial
number label is in two parts . (Refer to Figure 1-1 .) The rst part makes up the serial number
prex and consists of four digits and a letter . The second part makes up the serial number
sux and consists of the last ve digits on the serial number label. The serial number prex is
the same for all identical modules; it only changes when a change in the electrical or physical
functionality is made . The serial number sux, however , changes sequentially and is dierent
for each module .
Figure 1-1. Typical Serial Number Label
Getting Started 1-3
Page 23
T able 1-1. Hewlett-P ackard Sales and Service Oces
US FIELD OPERA TIONS EUROPEAN OPERA TIONS INTERCON OPERA TIONS
HEADQU ARTERS HEADQU ARTERS HEADQU ARTERS
Hewlett-P ackard Company Hewlett-P ackard S.A. Hewlett-P ackard Company
19320 Pruneridge A venue 150, Route du Nant-d'A vril 3495 Deer Creek Rd.
Cupertino , C A 95014, USA 1217 Meyrin 2 P alo Alto , California 94304-1316
(800) 752-0900 Geneva Switzerland (415) 857-5027
(41 22) 780.8111
California A ustralia
Hewlett-P ackard Co .
1421 South Manhattan A ve . Hewlett-P ackard France 31-41 Joseph Street (P .O . Box 221)
Fullerton, CA 92631 1A venue Du Canada Blackburn, Victoria 3130
(714) 999-6700 Zone D'A ctivite De Courtaboeuf (61 3) 895-2895
Hewlett-P ackard Co . France
301 E. Evelyn A ve . (33 1) 69 82 60 60 Hewlett-P ackard (Canada) Ltd.
Mountain View , C A 94041 17500 South Service Road
(415) 694-2000
Colorado
Hewlett-P ackard Co . 61352 Bad Homburg (514) 697-4232
24 Inverness Place Germany
East Englewood, CO 80112 (+49 6172) 16-0
(303) 649-5000 Y okogawa-Hewlett-P ackard Ltd.
Georgia
Hewlett-P ackard Co . Eskdale Road, Winnersh Triangle (81 427) 59-1311
2124 Barrett P ark Drive W okingham, Berkshire RG11 5DZ
Kennesaw , G A 30144 England
(404) 955-1500 (44 734) 696622 China Hewlett-P ackard, Co .
Illinois
Hewlett-P ackard Co . Hai Dian District
5201 T ollview Drive Beijing, China
Rolling Meadows , I L 60008 (86 1) 256-6888
(708) 342-2000
New Jersey
Hewlett-P ackard Co . Pte . Ltd.
150 Green P ond Road Alexandra P .O . Box 87
Rockaway , N J 07866 Singapore 9115
(201) 586-5400 (65) 271-9444
France
F-91947 Les Ulis Cedex
Germany
Hewlett-P ackard GmbH Kirkland, Quebec H9J 2X8
Hewlett-P ackard-Strasse Canada
Great Britain
Hewlett-P ackard Ltd. Kanagawa 229, Japan
Hewlett-P ackard A ustralia Ltd.
Canada
Trans-Canada Highway
Japan
1-27-15 Y abe , Sagamihara
China
38 Bei San Huan X1 Road
Shuang Y u Shu
Singapore
Hewlett-P ackard Singapore
T exas T aiwan
Hewlett-P ackard Co . Hewlett-P ackard T aiwan
930 E. Campbell Rd. 8th Floor , H-P Building
Richardson, TX 75081 337 Fu Hsing North Road
(214) 231-6101 T aipei, T aiwan
1-4 Getting Started
(886 2) 712-0404
Page 24
Returning Y our RF Section for Service
Hewlett-P ackard has sales and service oces around the world to provide complete support for
your RF section . T o obtain servicing information or to order replacement parts , contact the
nearest Hewlett-P ackard sales and service oce listed in T able 1-1 .
Use the following procedure to return your RF section to Hewlett-P ackard for service:
1. Fill out a service tag (available at the end of this service guide) and attach it to the
instrument. Please be as specic as possible about the nature of the problem. Send a copy
of any or all of the following information:
any error messages that appeared on the HP 70000 Series display
a completed P erformance T est record
any other specic data on the performance of the RF section
CA UTION
2. Place the RF section in its original packaging materials
If the original packaging materials are not available , you can contact a Hewlett-P ackard
sales and service oce to obtain information on packaging materials or you may use an
alternative packing material referred to as \bubble-pack". One of the companies that makes
bubble-pack is Sealed Air Corporation of Hayward, California, 94545.
3. Surround the RF section with at least 3 t o 4 inches of its original packing material or
bubble-pack to prevent the RF section from moving in its shipping container
4. Place the RF section , after wrapping it with packing material, in its original shipping
container or a strong shipping container that is made of double-walled corrugated cardboard
with 159 kg (350 lb) bursting strength.
The shipping container must be both large enough and strong enough to accommodate your
RF section and allow at least 3 t o 4 inches on all sides for packing material.
5. Seal the shipping container securely with strong nylon adhesive tape .
6. Mark the shipping container \FRA GILE, HANDLE WITH CARE" to help ensure careful
handling.
Damage can result if the original packaging materials are not used. P ackaging
materials should be anti-static and should cushion the RF section on all sides .
Never use styrene pellets in any shape as packaging materials . They do not
adequately cushion the instrument or prevent it from moving in the shipping
container . Styrene pellets can also cause equipment damage by generating
static electricity or by lodging in fan motors .
.
.
7. Retain copies of all shipping papers .
Getting Started 1-5
Page 25
1-6 Getting Started
T able 1-2. P ackaging for a 2/8 Module (RF Section )
Item Description HP P art Number Qty
1 Carton-outer 5180-8479 1
2 Carton-inner 9211-4781 1
3 Carton-sliders 5180-2369 1
4 F oam inserts 4208-0493 1
5 F oam pads 5180-8469 2
Page 26
Module V erication Software
Module V erication Software is a program that is designed to automate module verication
tests and adjustment procedures . Included in this chapter is a step-by-step procedure to load
the software and get the verication tests or adjustment procedures underway .F or more
detailed information, refer to the sections regarding individual menus .
This documentation supports Module V erication Software , Revision A.02.00 or greater .
Use this software with slave modules that have an HP 70900A/B local oscillator source as a
master . This software is controlled by a softkey-driven menu and user-interface screens . The
disks included with this module provide programs that test whether the module meets its
characteristics for system operation.
The
HP 70000 Modular Spectrum Analyzer Installation and V erication Manual
conguration information for predened models of HP 70000 Series modular spectrum
analyzer systems . The software automatically reads your system conguration data from the
Hewlett-P ackard Modular System Interface Bus (HP-MSIB) to determine which system or
modules you are using.
contains
2
Module V erication Software 2-1
Page 27
Computer Compatibility
Module V erication Software is written in HP B ASIC 4.0 and can run on the following HP 9000
Series 200/300 controllers . Minimum RAM requirement is 2.5 megabytes .
HP 9816 HP 9920 (with HP 35721A monitor)
HP 9836 HP 9000 Series 300 controller
When using an HP 9000 Series 300 controller , a medium-resolution monitor and either an
HP 98203C or an HP 46020A keyboard are required. A high-resolution monitor will preclude
printing graphical test results . Due to the various keyboards supported, some minor text
dierences appear in the menus and softkeys displayed on-screen. (Refer to \Alternate Key
Labels" for an explanation of keyboard dierences .)
Alternate K ey Labels
F or simplicity in this document, we assume that you are using an HP 9000 Series 200 controller
keyboard. Refer to the list below if your keyboard key labels do not match the ones used in
text.
K eyboard K ey Labels
4
EXECUTE
4
ENTER
4
RUN
4
CONTINUE
Computer Language Compatibility
Module V erication Software runs on HP B ASIC 4.0 , o r later , with the BIN les in RAM that are
listed below . A procedure for loading HP B ASIC is provided in \Installing Module V erication
Software ".
CLOCK ERR HPIB MA T
CS80* GRAPH IO MS
DISK
*Optional { supports Winchester disk drives .
y
Optional { supports microoppies and older Winchester disk drives
z
Optional { provides debugging features for program development.
5
: : : : : : : ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :
5
: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: :
5
: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: ::
5
:: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: :::
y
: : : : : ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :
press
GRAPHX KBD PDEV
Alternate K ey Labels
press
4
SYSTEM
.
4
SYSTEM
5
, then
z
5
, then
NNNNNNNNNNNNNNNNNNNNNNNNNN
CONTINUE
4
RETURN
4
RETURN
NNNNNNNNNN
N
RUN
5
5
In a shared resource management (SRM) environment, the following BIN les are also required:
DCOMM
SRM
Note
2-2 Module V erication Software
If you have set up some RAM memory for specic usage
program uses RAM memory V olume \:MEMORY , 0 , 15". Move any information
stored at this V olume to another location before running Module V erication
Software .
, b e aware that this
Page 28
Printer Compatibility
Module V erication Software supports any HP-IB printer; however , many of the printed test
results require a graphics printer . Graphical test results are not output to a non-graphics
printer .
Module V erication Software 2-3
Page 29
Conguring the Hardware
1. Connect the HP 70000 Series modular spectrum analyzer system to the computer port
determined by the following criteria:
F or computers with an HP 98624A HP-IB interface , connect your spectrum analyzer to the
port labeled HP-IB SELECT CODE 8. Check that the address switch on the HP 98624A
HP-IB interface board assembly matches the HP-IB controller device address . I f needed,
refer to the
F or computers without an HP 98624A HP-IB interface , connect the HP 70000 Series
modular spectrum analyzer system to the port labeled HP-IB SELECT CODE 7.
2. Connect the HP-IB cables from the test equipment to the computer's HP-IB SELECT CODE 7
port.
3. Use a H P 10833D 0.5 meter HP-IB cable , o r similar cable to connect the external disk drive's
HP-IB to the HP-IB SELECT CODE 7 port.
HP 9000 Series 200/300 controller P eripheral Installation Guide ,V olume 1
.
Note
4. Set the external test equipment and the HP 70000 Series modular spectrum analyzer system
line switches to ON. Allow the equipment to warm up as specied for the verication tests
or adjustment procedures .
5. Turn the disk drive (if used) and computer ON.
Occasionally disk drives exhibit unpredictable behavior when sharing the
HP-IB with instruments . I f you nd this occurring, connect the disk drive to a
separate HP-IB interface .
2-4 Module V erication Software
Page 30
Installing Module V erication Software
Use the following steps to get the program loaded and running. Later sections of this chapter
contain more specic program-operation information.
Note
Two assumptions are made with the Module V erication Software: 1) you are using standard
HP-IB addresses for the active devices of the microwave test station, and 2) all passive devices
for the microwave test station are available . I f either of these assumptions is inaccurate , you
are prompted for data during program execution.
1. Load HP B ASIC 4.0 or later , with the appropriate binaries , into an HP 9000 Series 200/300
controller . I f necessary , refer to an HP B ASIC reference manual.
CA UTION
2. Assign the MSI (mass storage is) to the drive you will use as the default drive
example , you can assign the MSI to a disk drive with the following:
3. Insert the Executive Disk into the assigned default drive
4. Type the following command line:
The software version number appears in the upper right-hand side of the initial display
Specic numbers vary , but the software version number looks similar to the following:
Rev. B.02.01
If you get an error message while installing this software , follow the directions
in the message and refer to \Error and Status Messages" for troubleshooting
instructions .
Make backup copies of all write-protected disks . I f the program data on an
individual disk should become altered, it cannot be ordered separately . The
entire set of disks must be ordered to replace any single disk.
.A s a n
MSI ":,700,0"
.
LOAD "MOD_VERF",1
and press
4
EXECUTE
5
(or
4
5
).
Return
.
Depending on the version of HP B ASIC that you are running, you may encounter an
error such as
edit the number of records that are declared in your Module V
Init_ram_memory
using.
T o edit the
a. If your system encounters an error with the
and display the error and a line number at the bottom of the display .
b. Type
c. Edit the line containing
d. Press
e. Press
Because this software is being run from oppy disk, this entire process must be repeated
each time that Module V erication Software is run.
5. Press
NNNNNNNNNNNNNNNNNNNNNNN
PROCEED
If you are using your module's software for the rst time , a message appears stating that
mass storage data is needed. Once mass storage data is stored, this message does not appear .
A similar message may also appear later for the parameter and equipment menus
NNNNNNNNNNNNNNNNNNNNNNN
PROCEED
ERROR 84 in 3072 Record not found
subroutine so that it runs properly with the version of HP B
Init_ram_memory
EDIT
and push the # key .
0,15",10
4
5
.
System
4
5
.
Run
and follow the on-screen prompts to create a mass storage data le .
and follow the on-screen prompts to create the menus
subroutine:
to read
. I f a n error such as this occurs ,
Init_ram_memory
0,15",256
and press
erication Software's
ASIC you are
subroutine , i t will stop
.
4
EXECUTE
5
(or
4
Return
. Press
5
).
Module V erication Software 2-5
Page 31
6. Load the Operating Disk as directed. The Operating Disk probably needs to remain in the
drive specied as the MSI default drive .
Loading the Operating Disk may require up to two minutes .
An error message may be displayed at this point. If the device under test (DUT) does not
match the module listed in the HP-MSIB A ddress Map , o r i f the software you are using
belongs to another module of your system, refer to \Error Messages" at the end of this
chapter to determine a course of action.
7.
Insert the Driver Disks into the drive specied on-screen and press
NNNNNNNNNNNNNNNNNNNNNNN
PROCEED
.
Note
This process may require up to six minutes . I f the date and time prompt appears , enter the
date and time in the specied format. (This message appears only if date and time are not
current.)
If you have not entered serial numbers for passive devices that require calibration data for
test purposes , on-screen prompts request the data now . Enter the data via the Calibration
Data screen.
F or a detailed explanation of entering calibration data, refer to \Edit Calibration Data" under
\Menus" in this chapter . Enter the serial number for each device specied, or bypass the
device to continue if it is not used now
this prompt screen will not reappear .
Note
After all drivers have loaded and all required calibration data have been entered, a menu
with the following options is displayed:
Select
present, automatically .
Press
the status of the equipment in the menu (make it unavailable
private bus , and so on). Refer to \Equipment Menu" under \Menus" in this chapter
Press
Be sure that the Driver Disk you load is the disk that belongs with the module
you are testing.
. After entering and storing data for passive devices
In the future , you can access calibration data stored on the Operating Disk,
rather than enter the data for passive devices of a given serial number each
time you begin testing. The program displays any additional passive devices
requiring serial numbers and calibration data. Serial numbers are only required
for passive devices that need their calibration data stored on the Operating
Disk. Y ou are prompted to enter serial numbers for these devices only
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
FINAL TEST
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
equipment menu
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
test menu
to perform procedures for which the required test equipment is
and return to the Equipment Menu. From here you can modify
, readdress it, change the
to choose between verication tests or adjustment procedures .
.
.
,
If you have already entered either the verication test or adjustment menus , b e aware
that changing menus purges status information for any tests you have already run. Y ou
determine individual tests or individual adjustments to perform via the menu you select.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Press
MAIN MENU
If you wish to change to the other menu, select
available , use the
been selected, a key to change to the other menu becomes available
2-6 Module V erication Software
to customize your test process via any other menu.
4
PREV
5 or 4
NNNNNNNNNNNNNNNNNNNNNNNNNNNN
N
MORE KEYS
5
keys on your keyboard. Once one of these keys have
NEXT
NNNNNNNNNNNNNNNNNNNNNNNNNNNN
N
;i f
MORE KEYS
.
is not
Page 32
Module V erication Software Overview
T esting Multiple Modules
Module V erication Software tests only one module at a time . I f you have more than one
module to test in your system, test them separately . I f you have tested a module and want to
change the module being tested without turning o the controller , follow the steps below .
N
1.
Return to the Main Menu, then press
2. In the Equipment Menu edit screen, move the item indicator to the Device Model number
column next to the DUT .
3. Press
4.
5.
NNNNNNNNNNNNNNNNNNNN
SELECT
N
NNNNNNNNNNNNN
Press
DONE
From the Main Menu, press
under test is ____; but the software supports the ____ module
NNNNNNNNNNNNNNNNNNNN
RELOAD
access to the Equipment Menu or HP-MSIB A ddress Menu. From the Equipment Menu, you
can select the module under test's model number and modify it to the module number of
the software now loaded. From the HP-MSIB A ddress Menu, select the module to test that
matches the software you already have loaded. Otherwise , press
, modify the model number , and press
N
, then
and follow the on-screen prompts to load test software ,o r
NNNNNNNNNNNNNNNNNNNNNNNNNNNN
main menu
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
.
test menu
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
equipment menu
.I f
ERROR MESSAGE: Selected instrument
.
4
ENTER
5
.
appears , press either
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
CHANGE DUT
NNNNNNNNNNNNNNNNN
ABORT
.
to gain
Error Messages or W arnings Dened
There are three kinds of error messages or warnings generated by the program.
One appears briey at the bottom of the CRT display
to a menu that asks you for corrections or modications
Another type of error message begins with
These errors are user-correctable and anticipated by the program. There is usually a
Possible Fix
The nal type begins with
of an unanticipated error . There is no suggested x displayed. If you cannot recover from
one of these errors , please contact your Hewlett-P ackard Sales and Service Oce .
Final T ests Dened
T ests dened as Final T ests are a subset of all available verication tests for a given module
After
any
the Final T ests , install it into any mainframe and expect performance within its specied
characteristics .P erform tests classied as A dditional T ests after troubleshooting or adjustments
to be sure of the proper operation of specic assemblies . The
dened purpose while performing adjustments .
message displayed to help you clear the problem.
ERROR
module-level adjustment or repair , run Final T ests . Once a module has passed
and provides no special softkeys . The message informs you
ERROR MESSAGE
. The program then goes automatically
.
and provides special softkeys .
.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
N
FINAL TEST
softkey has no
Module V erication Software 2-7
Page 33
Single T ests Dened
Y ou may select individual tests with this program. Refer to \T est Menu" under \Menus" in this
chapter for a description of selecting individual tests . A s explained in \Final T ests ," specic
assembly performance is checked by running assembly-associated performance tests .
Printing T est Results
The program shows whether each procedure passed or failed. Y ou may congure the computer
operations to format and print test results via the P arameter Menu. If an HP-IB printer is on
the bus and an address is provided in the Equipment Menu, and you congured the P arameter
Menu to print test results , the program automatically prints the test results . The printout
includes a title and summary page .
The title page lists the following data:
Module software used and the test date .
Serial number of the module tested.
Firmware version of the module tested.
P ower line frequency .
T est person's identication.
T est equipment model numbers and names , addresses , and ID or serial number .
The Summary P age lists total test time beside the titles of tests performed. The Summary P
also includes test results beneath one of the following categories:
Not all Final Tests have been completed
The following Final Tests need to be completed:
The following tests showed insufficient performance:
The following tests met the appropriate requirements:
The following additional tests were not completed:
...
and so forth
age
2-8 Module V erication Software
Page 34
Menus
Menu Structure
The rst menu presented allows you to go to the Main Menu, to begin Final T ests , o r t o return
to the Equipment Menu. From the Main Menu, access any of the following menus:
Main Menu
Mass Storage Menu
P arameter Menu
Equipment Menu
Edit Calibration Data
HP-MSIB A ddress Menu
T est Menu
Except for the T est Menu, these menus are conguration menus through which you initialize
the software for program operation. Via these menus , you enter information about disk drives ,
environment conditions , test equipment, the module under test, and so on. Refer to the
information following the menu name in this chapter for details .
In the T est Menu, you select and execute module-related procedures . The T est Menu provides
some testing options . Refer to \T est Menu" in this chapter for details .
The Mass Storage Menu, the P arameter Menu, and the Equipment Menu have two menu
screens . One is the edit screen, the other is the command screen. (The previously mentioned
menus use only the command screen.)
In edit screens , you can edit displayed data or input data to the screen.
In command screens , you may perform various menu-specic functions , which include storing
edited data, selecting test mode , accessing the help screen, accessing the Main Menu, and so
on.
Edit and Command Screen Menus
The following softkeys are present for menus that appear in Figure 2-1 through Figure 2-4 . Not
all of the menus have edit screens , but all have command screens . When softkey labels are
written in lowercase letters , a sub-level softkey menu exists for that particular softkey . Softkey
labels written in uppercase letters indicate that no further sub-level softkey menus exist for
that softkey .
Edit Screen Menus
The following softkeys are present for edit menus that appear in Figure 2-1 through Figure 2-4 .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SELECT OR SELECT/TOGGLE
NNNNNNNNNNNNNN
DONE
Command Screen Menus
either one of these keys appears in the Edit Menu.
activates the column item where the cursor is located, while
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SELECT/TOGGLE
exits the edit screen, then displays the menu's command
screen.
activates predened choices in the menu.
NNNNNNNNNNNNNNNNNNNN
SELECT
The following softkeys are present for the command menus pictured in Figure 2-1 through
Figure 2-4 . A n additional softkey ,
command screen. Refer to \Equipment Menu Command Screen" for information about this
softkey .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
edit cal data
, appears only in the Equipment Menu
Module V erication Software 2-9
Page 35
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
main menu
NNNNNNNNNNNNNN
EDIT
NNNNNNNNNNNNNNNNN
STORE
returns you to the \Main Menu." Refer to \Main Menu" in this chapter for
details .
appears if there is an edit screen in the menu you are working in. Pressing this
key returns you to the menu's edit screen.
appears if you have data that needs to be stored on the Operating Disk. The
HP-MSIB A ddress Menu does not require this softkey , therefore it does not
appear in that command menu.
NNNNNNNNNNNNNNNNNNNN
CREATE
NNNNNNNNNNNNNNNNNNNN
REPEAT
NNNNNNNNNNNNNNNNN
ABORT
appears if you tried to store data without an existing le
available .
le on the Operating Disk.
appears if the correct Operating Disk containing calibration
data is not in the disk drive . This key allows you to insert the
Operating Disk into the disk drive and try again.
displays the Main Menu screen.
special task screens but never in a menu screen. In general,
pressing this key a time or two will display the Main Menu,
which has a
NNNNNNNNNNNNNNNNNNNN
CREATE
NNNNNNNNNNNNNN
quit
activates the store function and creates a
NNNNNNNNNNNNNNNNN
ABORT
softkey .
is available in various
NNNNNNNNNNNNNN
HELP
NNNNNNNNNNNNNN
quit
4
RUN
NNNNNNNNNNNNNNNN
N
ABORT
, pressing
5
, which
.
.
.
If the Main Menu has not appeared for the rst time
NNNNNNNNNNNNNNNN
N
ABORT
returns you to where you were when you pressed
accesses menu and softkey descriptions . Listed below are softkey selections
and functions available via this softkey .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NEXT PAGE
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
PREVIOUS PAGE
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
PRINT HELP
NNNNNNNNNNNNNN
DONE
displays the quit screen. This softkey is available only from menu command
screens . After you press
B ASIC operating system. The following two softkey selections are available via
NNNNNNNNNNNNNN
the
quit
softkey .
NNNNNNNNNNN
YES
NNNNNNNN
NO
stops the program, retains any data les you stored before
pressing
(Y ou can press
Main Menu. The program retains all previously entered and
stored data.)
displays the edit screen of the previous menu, or the command
screen if there is no edit screen.
produces a message asking you to press
takes you to the top of the next available menu page
returns you to the top of the preceding menu page
generates a printout of help-screen information.
returns you to the command or edit screen of the menu
you were previously in.
NNNNNNNNNNNNNN
quit
, you are asked if you really want to return to
NNNNNNNNNNNNN
N
quit
, and returns you to B ASIC operating system.
4
5
to restart the program and return to the
RUN
Cursor K eys and Menu Selections
When a cursor is present, use either the cursor arrow-keys or the RPG (rotary pulse generator)
knob to position the cursor at the column item you wish to edit.
2-10 Module V erication Software
Page 36
Note
Main Menu
From the Main Menu screen you can access all other menus . There is no edit screen for this
menu. Figure 2-1 illustrates the Main Menu softkey organization.
In most cases , there are more selections available than are displayed
on-screen. Be sure to move the cursor to the right and down as far as you can.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NEXT PAGE
searches .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
and
PREVIOUS PAGE
keys are provided to speed your vertical
Aside from the common softkeys , there are two special softkeys presented in the Main Menu.
One is
NNNNNNNNNNNNNNNNNNNNNNN
RESTART
test a dierent module . Pressing this key aects the test status column of both the T est
Menu edit screen and HP-MSIB address screen. The remaining Main Menu softkeys include
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
mass storage
detail in their sections of this chapter .
If you have stored calibration data on another HP 70000 Software Product Operating Disk,
replace your current Operating Disk with that one and access the data. Be sure to return the
Operating Disk belonging with your module under test to the default drive
Mass Storage Menu
The B ASIC operating system can use a number of mass storage devices
disk drives , external disk drives , and SRM systems .Y ou are prompted to assign the areas where
the program stores system and operation data. Y
msus
location. A mass storage V olume is composed of one or more les . Files are data items or
subprograms .A V olume might consist entirely of les on a oppy disk, or some number of les
on a small portion of a hard disk. The Mass Storage Menu lists V
location of certain types of program information. These V olume Labels are explained below .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
FINAL TESTS
softkey . Press
(mass storage unit specier). An msus is a string expression that points to a mass storage
D A T A i s where the test results are temporarily stored.
, which begins the nal test sequence for a module . The second is the
NNNNNNNNNNNNNNNNNNNNNNN
RESTART
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
,
parameter menu
to recongure the program and retest a module ,o r t o
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
, and
equipment menu
ou do this by assigning V olume Labels to an
. Each of these menus is explained in
.
. These include internal
olume Labels that show the
ERROR LOG is where unanticipated errors are recorded for possible future use .
OPERA TING is where all the program data is stored.
The program retrieves specic information from the following V olume Labels:
SYSTEM contains the Driver Disk 3 program code . There must be an msus assigned to this
V olume Label.
OPERA TING contains the menu conguration les and calibration data.
DRIVER DISK contains the driver instrument control program code . There must be an msus
assigned to this V olume Label.
TEST DISK contains the module performance tests programs .
ADJUST DISK contains the module adjustment procedures .
V olume Labels each have a default msus . From the Mass Storage Menu, you can reassign the
current msus or directory path designation to another designation. Y ou cannot edit V olume
Labels , but you may edit their msus designations and directory path data elds
Module V erication Software 2-11
.
Page 37
Mass Storage Menu Edit Screen
The Mass Storage Menu softkeys and their functions are described below .
NNNNNNNNNNNNNNNNNNNN
SELECT
NNNNNNNNNNNNNN
DONE
1. Use either the keyboard arrow keys or the RPG knob to position the cursor next to the
column item you wish to edit. The annotations
scroll the screen left or right to view o-screen column items .
2.
NNNNNNNNNNNNNNNNNNNN
Press
SELECT
entry for the selected item is complete .
activates the column item where the cursor is located.
exits the edit screen, then displays the Mass Storage Menu command screen.
<=more
. Key in the new location (msus or Directory P ath). Press
and
more=>
indicate that you must
4
ENTER
5
when data
Note
3. Repeat steps 1 and 2 until you have nished editing. Press
Menu command screen.
The Data V olume is predened to use RAM DISK
initialized to at least 1040 records , o r contains additional les not required by module
verication, B ASIC error 64 may occur . Either reinitialize the RAM disk or use the Mass Storage
Menu edit screen to select another medium.
Mass Storage Menu Command Screen
From the command screen, you can press
Menu data for the rst time causes an error message prompting you to create a le
simply by pressing
Next, press
Mass Storage Menu edit screen.
P arameter Menu
Y ou may determine some operating conditions of the software program in the P arameter Menu.
Y ou can select the printer and its output parameters , decide whether you want the program
beep feature on or o, include a message on the test-results output, and so on. Use the
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SELECT/TOGGLE
state . The parameter items and their appropriate selections are dened below .
Leave the Directory P ath eld blank unless you are using an SRM system, or
HP B ASIC 5.0 (or later version) that uses directory path hierarchy .
NNNNNNNNNNNNNN
DONE
to display the Mass Storage
":MEMORY,0,0"
NNNNNNNNNNNNNNNNN
STORE
NNNNNNNNNNNNNNNNNNNN
CREATE
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
main menu
softkey to select the parameter item and enter data, or toggle to a predened
.
to return to the Main Menu screen, or press
to save the edited data. Saving Mass Storage
. I f this RAM disk is not
NNNNNNNNNNNNNN
EDIT
and return to the
. D o this
P arameter Menu Edit Screen
Results sent to: Y our choices are Screen or Printer . Press
Output F ormat:
2-12 Module V erication Software
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SELECT/TOGGLE
When
Screen
When
Printer
and printed out.
Y our choices are Graph or T able . Press
Graph
if appropriate for the particular test results (a graphics printer
is required if
Table
is displayed, test results are generated in a graph format
is displayed, the test results are output in a table format.
is displayed, the test results appear on the CRT .
is displayed, test results are displayed on-screen
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SELECT/TOGGLE
Printer
and
Graph
are both selected). When
.
. When
Page 38
Printer Lines:
Lines allowed are from 50 to 70. Press
a number from 50 to 70 to set the number of lines per printed
page .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SELECT/TOGGLE
. Enter
Line Frequency: V alid frequency selections are 50 Hz , 6 0 H z , and 400 Hz . Press
Beeper to be activated:
V erify equipment on HP-IB: Y our choices are Y es or No . Press
T est person's ID:
Number lines added: Lets you include a printed message with the test results
User Line: 1. P osition the cursor to the left-hand side of a User Line in the
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SELECT/TOGGLE
is displayed. The line frequency value aects some test results .
Y our choices are Y es or No . Press
is displayed, the warning and time-lapse reminder beeps are
activated. When No is displayed, the program's beep feature is
disabled.
your choice .
of each instrument on HP-IB at the address shown in the
Equipment Menu. Select No to bypass this feature .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Press
SELECT/TOGGLE
include it on the output report.
Depending on the program, you can enter up to 30 lines
no more than 30 characters per line . Enter the message you
wish to have printed in this screen by selecting User Line
menu. Press
2. The prompt,
Type in your message (up to 30 characters per line), then
press
4
ENTER
until the power line frequency for your system
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SELECT/TOGGLE
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SELECT/TOGGLE
Yes
causes the program to verify the presence
, then enter your name or ID number to
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SELECT/TOGGLE
Enter additional information
5
.
.
. When
to indicate
, appears .
Yes
.
, with
.
3. After you have entered your message , reposition the cursor
at
Number lines added:
your message occupies , then press
P arameter Menu Command Screen
NNNNNNNNNNNNN
N
Press
DONE
when you are nished with the P arameter Menu edit screen. The next screen
displayed is the command screen. Press
to return to the edit screen, or
Saving P arameter Menu data for the rst time causes an error message
you to create a le . D o this simply by pressing
Equipment Menu
The Equipment Menu edit screen displays a list of all the equipment required to test your
DUT completely . Next to each DEVICE TYPE in the equipment list is a column labeled
DEVICE MODEL for the model number , ADDRESS for the HP-IB address , SERIAL or ID NO .
(for example , calibration lab number), and PRIV A TE BUS for private bus designation (as for
HP 8757C scalar network analyzers , and so on).
Chapter 4 contains a table of required test equipment. Using preferred models of test
equipment assures the most complete verication and adjustment testing. Refer to Chapter 8
and Chapter 7 for individual test descriptions and test setups
NNNNNNNNNNNNNNNNNNNNNNNNNNNN
N
main menu
NNNNNNNNNNNNNNNN
N
STORE
to save any edited P arameter Menu data,
to return to the Main Menu screen.
NNNNNNNNNNNNNNNNNNNN
CREATE
. Enter the number of user lines
4
5
ENTER
.
.
.
. The message prompts
NNNNNNNNNNNNN
N
EDIT
Module V erication Software 2-13
Page 39
Equipment Menu Edit Screen
From the Equipment Menu edit screen you can enter data about your test equipment. Y ou
cannot edit the DEVICE TYPE column.
Y ou may use either the cursor arrow keys or the RPG knob to position the cursor at the column
item you wish to edit.
1. Edit a DEVICE MODEL item by locating the cursor beside the model number you wish to
edit. Press
2. Edit an ADDRESS by locating the cursor beside the address you want to edit. Press
NNNNNNNNNNNNNNNNNNNN
SELECT
the ADDRESS column,
required the device .T ests tagged with
V alid active device addresses are restricted to the following ranges:
700 to 730 and 800 to 830 for an HP 70000 Modular Spectrum Analyzer master module .
700 to 730 for any other device type .
These three-digit HP-IB address include the HP-IB select code and the actual HP-IB address .
F or example , a n H P 70000 Series modular spectrum analyzer system HP-IB select code of 8
and an HP-IB address of 21 yields an address of 821. The addresses of DUT
slaves should match their master device's address .
A ddress passive devices (non-programmable devices such as sensors , directional bridges , and
detectors) as either
Available
the device . The calibration data for a passive device is stored on the Operating Disk.
P assive devices tagged
printed next to the test names on the test results that are output for any procedure that
required the missing device .T ests tagged with
3.
Edit a SERIAL NUMBER by locating the cursor beside the serial number
enter the new serial number (10 digits or less), then press
that have
NNNNNNNNNNNNNNNNNNNN
SELECT
, edit the address , then press
in the address column requires entering calibration data and a serial number for
Available
, type the model number , then press
4
5
ENTER
Missing ETE
Available or Not Available
Not Available
displayed in the address column must also have a serial-number entry
is included in the Status column next to the tests that
. I f the DEVICE MODEL has no address in
Missing ETE
.F or some of the passive devices , entering
in the address column cause
Missing ETE
4
5
ENTER
are not performed.
.
Missing ETE
are not performed.
4
5
ENTER
. Some passive devices
s that function as
to be
. Press
NNNNNNNNNNNNNNNNNNNN
SELECT
,
.
4. Enter 19 in the PRIV A TE BUS column if you are to use a Microwave or Full Microwave
source with a network analyzer . Congure these instruments by connecting the source's
HP-IB cable to the network analyzer's SYSTEM INTERF A CE connection.
a. Move the cursor through the DEVICE TYPE column until you reach the Full Microwave
or Microwave source , then move horizontally to the PRIV A TE BUS column.
b. Enter 19 and press
selected source when 19 appears in the PRIV A TE BUS column. Nineteen is the only
allowable address for sources on a private bus . Refer to the network analyzer's manual
for addressing information.
Equipment Menu Command Screen
After you have nished editing the Equipment Menu, press
Menu command screen. Press
Saving Equipment Menu data for the rst time generates an error message prompting you to
create a le . D o this simply by pressing
This command screen displays the following additional softkeys:
2-14 Module V erication Software
4
ENTER
5
. The program enters the ADDRESS column data for the
NNNNNNNNNNNNNN
DONE
NNNNNNNNNNNNNNNNN
STORE
to save the edited data.
NNNNNNNNNNNNNNNNNNNN
CREATE
.
to enter the Equipment
Page 40
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
edit cal data
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NO ADDRESS
displays the Select P assive Device screen. From this screen, move the
cursor to the passive device that needs its calibration data edited.
NNNNNNNNNNNNNNNNNNNN
Press
SELECT
Data" in this chapter for more information.
appears only if the program cannot nd an instrument at a specied
HP-IB address .T o check which instruments are not responding, follow
the steps below .
1. A ccess the Equipment Menu edit screen.
2. Scroll the ADDRESS column for ashing addresses , then be sure that
the instrument is on.
NNNNNNNNNNNNNNNNNNNN
3.
SELECT
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NO ADDRESS
, then enter the required data. Refer to \Edit Calibration
the ashing address and either correct the address or press
to delete all fault-addresses from the edit menu.
Note
Edit Calibration Data
The Select P assive Device screen displays all passive devices needing calibration data entered.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
N
Press
edit cal data
calibration data for some of the passive devices listed in the Equipment Menu edit screen.
Note
Either exiting the Equipment Menu or entering the T est Menu causes the
program to search the addresses in the Equipment Menu for instruments
assigned to HP-IB , i f this feature is selected in the P arameter Menu.
4. Press
to enter the Select P assive Device screen. The program requires
Selecting a passive device needing a serial number generates a prompt
requesting that you enter the number via the Equipment Menu. If you have
formerly entered calibration data for a passive device of a given serial number
and you would rather not reenter the data, replace your current Operating
Disk with one containing data for passive devices from previous testing. Press
NNNNNNNNNNNNNNNNNNNN
REPEAT
enter the passive device's calibration data, press
Calibration Data screen, then begin at step 4.
to access the calibration data from that disk. If you only need to
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
main menu
to enter calibration data for passive devices . Pressing
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
edit cal data
the following section for more information.
to return to the Main Menu, or
displays the Select P assive Device screen. Refer to
NNNNNNNNNNNNNNNNNNNN
CREATE
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
edit cal data
to enter the Edit
1. Locate the cursor beside the device and press
you to delete or edit data related to the passive device .
Note
2. If you edit the factory default FREQUENCY or CAL F A CTORS values , enter valid calibration
factors for each frequency edited.
Not all frequencies are listed on the screen at once . B e sure to enter calibration
data for frequencies listed on the next pages of the display .
NNNNNNNNNNNNNNNNNNNN
SELECT
. The next screen displayed allows
Module V erication Software 2-15
Page 41
Note
F or power sensors , you must enter a frequency and calibration factor for
10 MHz and 300 MHz, even if the device has no factor listed at 10 MHz
or 300 MHz . Enter the values from the list of valid factors , below . Other
frequencies outside the normal range of the device may also be required. Prior
to using your device , you may need to calibrate it at these frequencies to
ensure accurate measurement results .
P assive Device
Mixers
Directional Couplers
Noise Sources
Sensors
Edit Calibration Data Edit Screen
1. Move the cursor to a column item and press
calibration factor , then press
numeric order . The program sorts them before storing them on the Operating Disk.)
2.
T o delete an item, move the cursor to the column item. Press
move to another item. Repeat the above process as needed to edit frequency values or
calibration data for any passive devices .
Edit Calibration Data Command Screen
1. After you have entered the necessary data, press
screen is displayed.
2.
From the command screen, you can press
the program.
HP-MSIB A ddress Menu
: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: :
::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: ::
: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :
: : : : : : : ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :
:: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :
0.3 to 1.6 (stored as a percentage by the program)
NNNNNNNNNNNNNNNNNNNN
4
ENTER
SELECT
5
. (It is not necessary to enter new frequency values in
N
NNNNNNNNNNNNNNNNNNNNNNNNNNNN
main menu
. Enter the new frequency or
NNNNNNNNNNNNNNNNNNNN
SELECT
NNNNNNNNNNNNN
N
DONE
. The Equipment Menu command
when you are ready to continue with
Calibration F actors
, clear the line , then
16 to 24 dB
8t o 1 1 d B
12 to 16 dB
The HP-MSIB A ddress Menu lists the names and HP-MSIB addresses of the modules in the
HP 70000 Series modular spectrum analyzer system that you may select to test. The HP-MSIB
address of the master and the system are the same . I n other words , the address of the master
module determines the address of the system. F or information on conguring the software to
test a specic module , refer to \Equipment Menu" in this chapter .
There is no edit screen for this menu. The command screen has a
but requires no
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SELECT MODULE
the Equipment Menu.
T est Menu
Pressing
ERROR MESSAGE: The ____ is listed as the DUT in the Equipment Menu, but the ____ is
selected in the HP-MSIB Address Menu
select either
wish to test.
If you press
number to the module you want to test. If you press
2-16 Module V erication Software
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
test menu
NNNNNNNNNNNNNNNNN
STORE
. B e sure the module selected here matches the
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
MODIFY MODULE
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
MODIFY MODULE
softkey . Locate the cursor next to the module you wish to test. Press
from the Main Menu screen accesses the T est or A djust selection screen. If
appears , the possible x information suggests you
to enter new ROM data or
, on-screen commands help you change the model and serial
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
CHANGE DUT
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
CHANGE DUT
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SELECT MODULE
Device Under Test
to select the module you
, g o either to the Equipment
softkey
listed in
Page 42
Menu to change the model number or to the HP-MSIB A ddress Map to select the module
number you want to test.
T o begin the testing process , select
adjustments procedures . Press
If you have pressed
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
main menu
and want to get to the verication tests , press
NNNNNNNNNNNNNNNNNNNNNNN
,
RESTART
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
FINAL TEST
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
,
TEST MENU
NNNNNNNNNNNNNN
TEST
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
main menu
, and wish to get to the adjustment procedures , press
to run verication tests or
to return to the Main Menu.
, then
NNNNNNNNNNNNNNNNNNNN
ADJUST
. I f you are in the adjustment procedures
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
main menu
NNNNNNNNNNNNNNNNNNNNNNN
,
RESTART
NNNNNNNNNNNNNNNNNNNN
ADJUST
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
,
TEST MENU
to perform
, then
NNNNNNNNNNNNNN
TEST
.
CA UTION
After selecting
column for tests performed.
A dditional test equipment is required to perform tests beside which
review which additional test equipment is required, locate the cursor beside the test name
then press
test.
A message stating that calibration data for passive devices is missing may also appear
correct Operating Disk is in the default drive , store the calibration data there . Press
build the data le . After the problem is cleared, the T est Menu is displayed.
T est Menu Command Screen
The T est Menu only has a command screen. It deviates from the command screen formats
previously described. The following list denes the softkeys available in this menu.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
FINAL TEST
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
N
RESUME TESTING
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SINGLE TEST
Pressing either
purges T est Menu Status column information. Selecting a new module to
test in the HP-MSIB Map Screen Menu also deletes the Status column data.
The assumption is that verication-test status will most likely be modied if
you are moving between modules , ETE model numbers , o r t o the adjustment
procedures .
Tests
, the names of the verication tests are displayed. Review the Status
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SINGLE TEST
begins a sequence of nal tests , which are a subset of verication tests .A
full calibration requires all verication tests . Review the T est Menu T est
Name list for all available tests . During the nal test sequence , the keys
listed below are also available .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
END SEQUENCE
NNNNNNNNNNNNNNNNN
ABORT
allows you to continue the nal test sequence after you have pressed
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
FINAL TEST
lets you select an individual test to run. If
Status column, you can review which test equipment is missing. Locate
the cursor beside that test name , then press
ETE screen is displayed. If you choose to return to the T
Menu via the T est Menu to install the missing test equipment, you lose
NNNNNNNNNNNNNNNNNNNNNNN
RESTART
. The Missing ETE screen displays the missing test equipment for that
followed by
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
or
equipment menu
interrupts the test sequence at the end of the test
in progress . The T est Menu is displayed with an
additional softkey labeled
this key to resume the test sequence where the
program left o.
ends the testing process and displays the T est Menu.
From there you may choose some other action.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
END SEQUENCE
any time after testing begins
Missing ETE
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
RESUME TESTING
.
Missing ETE
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SINGLE TEST
is listed. T o
. I f the
NNNNNNNNNNNNNNNNNNNN
CREATE
. Press
is listed in the
. The Missing
est Equipment
,
to
Module V erication Software 2-17
Page 43
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
multiple test
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
N
repeat mult.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
more keys
the status of any tests that have run. T o run a single test that has
the necessary ETE, locate the cursor beside the test name and press
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SINGLE TEST
softkey lets you organize a group of tests sequentially . Locate the cursor
beside the test you want to run. Press
of the series to that test. Continue to locate the cursor and press
until you have organized the tests you want to run. Press
when you are ready to begin testing. During testing, the following
softkeys are also available .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
N
END SEQUENCE
NNNNNNNNNNNNNNNNN
ABORT
softkey allows you to select a test sequence (you determine the quantity
and order). The tests loop through this sequence until you decide to stop
them. Locate the cursor beside the test you want to run, press
move the cursor to the next test, press
selecting tests until you are ready to begin testing. It is acceptable to
select the same test for repeated testing. Press
sequence . During testing, the following softkeys are also available
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
END SEQUENCE
toggles between
the previously explained T est Menu command screen softkeys .
NNNNNNNNNNNNNNNNNNNNNNN
SUMMARY
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
select output
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
PURGE CAL DATA
.
NNNNNNNNNNNNNNNNNNNN
SELECT
interrupts the test sequence at the end of the test in
progress , then displays the T est Menu.
ends the testing process and displays the T est Menu.
From there you may choose some other action.
NNNNNNNNNNNNNNNNNNN
N
SELECT
interrupts the test sequence at the end of the test in
progress , then displays the T est Menu.
the testing process and displays the T est Menu. From
there you may choose some other action.
NNNNNNNNNNNNNNNNNNNNNNN
SUMMARY
gives you a printout of the current tests run.
chooses an output device .Y ou can print test results
by pressing
display by pressing
to the previous set of softkeys in the T est Menu
command screen.
Pressing this softkey deletes stored calibration data
for the spectrum analyzer and any other calibration
routines used for testing. Before module verication
tests can be run again, equipment calibration routines
have to be redone .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
,
select output
NNNNNNNNNNNNNNNNNNNNNN
N
PRINTER
, o r you can print the current
NNNNNNNNNNNNNNNNNNN
N
SCREEN
to assign the rst number
NNNNNNNNNNNNNNNNNNNNNNNNNN
END LIST
, and so on. Continue
NNNNNNNNNNNNNNNNNNNNNNNNN
N
END LIST
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
, and
PURGE CAL DATA
. Press
to start the test
n
NNNNNNNNNNNNNNNNNNN
N
RETURN
NNNNNNNNNNNNNNNNNNNN
SELECT
NNNNNNNNNNNNNNNNNNN
N
SELECT
.
NNNNNNNNNNNNNNNNN
ABORT n ends
and
to return
,
2-18 Module V erication Software
Page 44
Figure 2-1. Main Menu Softkeys
Module V erication Software 2-19
Page 45
Figure 2-2. Mass Storage Menu and P arameter Menu Softkeys
2-20 Module V erication Software
Page 46
Figure 2-3. Equipment Menu and HP-MSIB Map Screen Menu Softkeys
Module V erication Software 2-21
Page 47
2-22 Module V erication Software
Figure 2-4. T est Menu Softkeys
Page 48
Error and Status Messages
User interface messages used with HP 70000 Series software products are alphabetized in
this section. The messages are designed to provide information about test results , operator
errors , and system conditions . Refer to your
information.
Aborted
Y ou aborted the test indicated.
EEPROM for ____ is defective.
The EEPROM needs to be replaced.
Failed
The module under test needs adjustment or repair to pass the test number indicated.
CAUTION: Passthru address is incorrect. (See Edit Screen).
The address of the microwave source is not set to 19, or the address specied in the
Equipment Menu does not match the address of the synthesized source . Return to the edit
screen of the Equipment Menu to modify addresses in either the address column or the
private bus column.
CAUTION: Some Model #'s are not supported. (See Edit Screen).
HP B ASIC Language R eference
for system error
Y ou have model numbers in the Equipment Menu that are not supported by the software
Ignore this caution if you are sure program memory contains a driver for these models
A driver that is required but missing causes the error message
subprogram
Equipment list is not acceptable.
Y ou attempted to enter the T est Menu, but the program could not locate all the instruments
for which you have specied HP-IB addresses .V erify that the indicated equipment is turned
on, then return to the Equipment Menu edit screen to verify accuracy of addresses that are
ashing in either the address column or the private bus column.
Equipment list shows no analyzer to test.
The DUT has no assigned HP-IB address . Return to the Equipment Menu and edit the
A ddress column.
ERROR: Address matches system disk drive
Y ou entered an HP-IB address matching that of the computer's external disk drive . HP-IB
protocol allows only one instrument per address .
Address not in acceptable range.
Y ou entered an HP-IB address outside the range 700 to 730, inclusive .
ERROR: Duplicate HP-IB address.
Y ou attempted to exit the Equipment Menu after assigning the same HP-IB address to
dierent model numbers . HP-IB protocol allows only one instrument per address . (It is
acceptable to assign the same address to identical model numbers , implying multiple use of
the same instrument.)
to appear on-screen. Y ou are returned to the T est Menu.
.
Undefined function or
.
.
ERROR: Non-responding HP-IB address
Y ou attempted to exit the Equipment Menu after assigning an HP-IB address to an
instrument not responding on HP-IB .
.
Module V erication Software 2-23
Page 49
ERROR: Search for ____ unsuccessful.
The program tried to nd the disk identied but could not. Either assign a drive to the disk
and press
ERROR: Some devices listed as Available require serial numbers.
Y ou pressed
required serial number . Display the Equipment Menu edit screen and assign the serial
number .
ERROR MESSAGE: Address is HP-IB controller address.
Y ou entered an HP-IB address matching the computer's address . HP-IB protocol allows only
one instrument per address .
ERROR MESSAGE: Attempt to close file ____ failed.
There is a problem with the data le on the Operating Disk. Correct the problem, then do
one of the following:
Press
Press
Press
ERROR MESSAGE: Attempt to create file ____ failed.
There is a problem with the data le on the Operating Disk. Correct the problem, then do
one of the following:
Press
Press
Press
NNNNNNNNNNNNNNNNNNNN
REPEAT
NNNNNNNNNNNNNNNNNNNN
REPEAT
NNNNNNNNNNNNNNNNNNNN
CREATE
NNNNNNNNNNNNNNNNN
ABORT
N
NNNNNNNNNNNNNNNNNNN
REPEAT
NNNNNNNNNNNNNNNNNNNN
CREATE
NNNNNNNNNNNNNNNNN
ABORT
or insert the required disk into its appropriate drive . Press
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
View Cal Data
to try again.
to create a new le .
to return to the Main Menu.
to try again.
to create a new le .
to return to the Main Menu.
, then selected a device to which you have not assigned a
NNNNNNNNNNNNNNNNNNNN
REPEAT
.
ERROR MESSAGE: Attempt to Edit Mass Storage failed.
Y our edits to the Mass Storage Menu were not valid. Return to this menu and correct the
errors .
ERROR MESSAGE: Attempt to store Mass Storage failed.
ABORT
NNNNNNNNNNNNNNNNN
ABORT
to return to the Main Menu.
after pressing
Y ou pressed
NNNNNNNNNNNNNNNNN
Press
ERROR MESSAGE: Bad instrument address in equipment list. Address matches
controller.
Y ou entered an HP-IB address matching that of the controller
one instrument per address and only one controller per HP-IB system. (The factory preset
controller address is 21.)
ERROR MESSAGE: Calibration data frequency exceed acceptable limits.
Return to the Calibration Data edit screen and correct the data entries that are ashing.
ERROR MESSAGE: Calibration data frequency is less than minimum range of ____.
The frequency entered next to the device in the Cal Data edit screen is out of the device's
operating range . The return to this screen is automatic
values that are ashing.
NNNNNNNNNNNNNNNNN
STORE
mass storage . The Mass Storage Menu failed.
. HP-IB protocol allows only
. Enter valid frequencies for the
2-24 Module V erication Software
Page 50
ERROR MESSAGE: Calibration data frequency is greater than maximum range of ____.
The frequency entered next to the device in the Cal Data edit screen is out of the device's
operating range . The return to this screen is automatic . Enter valid frequencies for the
values that are ashing.
ERROR MESSAGE: Calibration data for ____ is blank for some frequencies listed.
Return to the Calibration Data edit screen to enter the calibration data for frequencies
indicated with ashing markers .
ERROR MESSAGE: Calibration data for ____ is less than minimum range of ____.
The factor entered next to the device in the Cal Data edit screen is out of the device's
operating range . The return to this screen is automatic . Enter valid values for the ones that
are ashing.
ERROR MESSAGE: Calibration data for ____ is greater than maximum range of ____.
The factor entered next to the device in the Cal Data edit screen is out of the device's
operating range . The return to this screen is automatic . Enter valid values for the ones that
are ashing.
ERROR MESSAGE: Calibration data file not found for ____ with serial number ____.
The data le cannot be found or there is a problem with the data le on the Operating Disk.
Correct the problem, then either press
ERROR MESSAGE: DUT does not have an address.
Y ou attempted to leave the T est Equipment Menu, but the program cannot verify the DUT
at the specied HP-IB address . First check the address . I f the address is correct, cycle the
main power of the system under test.
ERROR MESSAGE: DUT was not at address in the equipment list. DUT was expected at
address ____.
The DUT is not at the specied address , o r HP-IB is at fault, or main power is o on the
DUT . Press
ERROR MESSAGE: DUT was not found at address in equipment list.
The address specied for the DUT is not valid. Press
Menu to verify the address .
ERROR MESSAGE: Equipment address matches external disk drive.
Y ou entered an equipment address matching that of the external disk drive . HP-IB protocol
allows only one instrument per address .
ERROR MESSAGE: Equipment Menu data not found on ____.
The program could not nd the Equipment Menu data le on the Operating Disk.
Fix
instructions appear with the on-screen error message . I f the data le is available in a
location other than the one currently specied in the Mass Storage Menu, return to that
menu and change the msus and/or the directory path of the Operating Disk. It may also be
that the Operating Disk accessed by the program is not the one containing the Equipment
Menu le . Insert the correct Operating Disk, then press
NNNNNNNNNNNNNNNNN
ABORT
, then return to the Equipment Menu to verify the address
NNNNNNNNNNNNNNNNNNNN
REPEAT
to try again or press
NNNNNNNNNNNNNNNNN
ABORT
, then return to the Equipment
NNNNNNNNNNNNNNNNNNNN
REPEAT or 4
4
CONTINUE
CONTINUE
5
.
.
5
.
Possible
ERROR MESSAGE: Equipment does not have an address.
There is no address assigned to the DUT
verify or enter an address in the A ddress column.
. Return to the Equipment Menu edit screen and
Module V erication Software 2-25
Page 51
ERROR MESSAGE: ERROR XXX in XXXXX ____ .
An unanticipated occurrence in the program caused a program failure .F or clarication, call
your Hewlett-P ackard Sales and Service Oce .
ERROR MESSAGE: File ____ not found while assigning I/O path.
Y ou attempted to
the current Operating Disk.
message .F ollow the on-screen instructions or return to the Mass Storage Menu to change
the location of the Operating Disk.
ERROR MESSAGE: Incorrect Volume found. ____ required.
The wrong disk is in the required storage medium. Either correct the fault and press
NNNNNNNNNNNNNNNNNNNN
REPEAT
you can indicate a dierent mass storage drive .
ERROR MESSAGE: Parameter Menu data not found on ____.
to retry , o r select
NNNNNNNNNNNNNNNNN
STORE
a list (equipment, mass storage , o r parameter) for the rst time on
Possible Fix
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
mass storage
instructions appear with the on-screen error
to return to the Mass Storage Menu. From here
The program could not nd P arameter Menu data le on the Operating Disk.
Fix
instructions appear with the on-screen error message . I f the data le is available in a
location other than the one currently specied in the Mass Storage Menu, return to that
menu and change the msus and/or the directory path of the Operating Disk. It may also be
that the Operating Disk accessed by the program is not the one containing the P
Menu data le . Insert the correct Operating Disk, then press
ERROR MESSAGE: Read ____ data from file ____ failed.
There is a problem with the data le on the Operating Disk. Correct the problem, then
either press
ERROR MESSAGE: Selected instrument under test is ____; but the software supports the
____.
The module entered in the HP-MSIB map is not currently supported by software
load the correct software or select a dierent module in the Equipment Menu or HP-MSIB
Map Menu.
ERROR MESSAGE: Sensor model # ____ not supported.
Software does not support the sensor model number entered for the Signal Sensor in the
Equipment Menu. Return to the Equipment Menu and select a sensor with a model number
that is supported. (Refer to Chapter 5 for a list of supported equipment.)
ERROR MESSAGE: Test Parameter data file not found on ____.
The program could not nd parameter-list data le on the Operating Disk.
instructions appear with the on-screen error message . I f the data le is available in a
location other than the one currently specied in the Mass Storage Menu, return to that
menu and change the msus and/or the directory path of the Operating Disk. It may also
be that the Operating Disk being accessed by the program is not the one containing the
parameter-list data le . Insert the correct Operating Disk, then press
NNNNNNNNNNNNNNNNNNNN
REPEAT
to try again or
4
CONTINUE
5
to use default values .
NNNNNNNNNNNNNNNNNNN
N
REPEAT or 4
NNNNNNNNNNNNNNNNNNNN
REPEAT or 4
Possible
arameter
5
CONTINUE
Possible Fix
.
. Either
CONTINUE
5
.
ERROR MESSAGE: The ____ is listed as the DUT in the Equipment Menu, but the ____ is
selected in the HP-MSIB Address Menu.
The DUT and the model selected in the HP-MSIB A ddress Map do not agree .Y ou are given
suggested x instructions either to modify the module or change the DUT
2-26 Module V erication Software
.
Page 52
ERROR MESSAGE: The Operating Disk is write protected.
Make a working copy of the Operating Disk and store the original in a safe place , o r remove
the write-protect.
ERROR MESSAGE: Too many Cal Data frequencies were eliminated. There must be at least
two frequencies.
Only one Cal Frequency remains in the Cal Data edit screen. Return to that screen and
enter more frequencies in the Frequency column.
ERROR MESSAGE: Write ____ data to file ____ failed.
There is a problem with the data le on the Operating Disk. Correct the problem, then do
one of the following:
NNNNNNNNNNNNNNNNNNNN
Press
REPEAT
NNNNNNNNNNNNNNNNNNNN
Press
CREATE
NNNNNNNNNNNNNNNNN
Press
ABORT
ERROR MESSAGE: Wrong device at specified address. DUT was expected at address ____.
to try again.
to create a new le .
to return to the Main Menu.
The address specied for the DUT is actually that of a test instrument.
instructions appear with the on-screen error message . I f necessary , return to the Equipment
Menu.
ERROR MESSAGE: ____ Volume was not located.
The program cannot access the listed V olume . I f the V olume is correct, press
retry . I f the V olume is incorrect, press
From here you can indicate a dierent mass storage medium for the V
FORMAT ERROR: Observe date format and character position.
Y ou entered the date/time in an unacceptable format. Enter date/time in the format
yyyy
and
hh:mm
, then press
Hdw Broken
A ctual test results far exceed the expected results
failure (hardware broken) or incorrect connections .
Logging errors to ERRORLOG failed. Operating Disk is write protected.
The program tried to store error data onto the Operating Disk and could not because of the
write-protect. Make a working copy of the Operating Disk and store the original in a safe
place , o r remove the write-protect.
KEYBOARD SYSTEM CRASH WITH KEYBOARD: ____.
The software program does not support the current keyboard. Install a keyboard having
one of the part numbers listed at the beginning of this chapter , then restart the program.
4
ENTER
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
mass storage
5
.
to return to the Mass Storage Menu.
. This is often an indication of a hardware
Possible Fix
NNNNNNNNNNNNNNNNNNNN
REPEAT
olume in question.
to
dd mmm
Passed
The module meets the tested characteristics .
Y ou pressed
execution.
PRGM ERROR
The program detected an error within itself. F or clarication contact Hewlett-P ackard
Santa R osa Systems Division
4
P A USE
5
on the computer keyboard. Press
PAUSED. PRESS CONTINUE.
4
CONTINUE
.
5
to resume program
Module V erication Software 2-27
Page 53
Reading errors from ERRORLOG failed. Check disk at ____.
The program tried to read error data from the Operating Disk. Check that the Operating
Disk is installed in the drive specied in the error message .
Return to Equipment Menu to enter serial number for ____.
Y ou must return to the Equipment Menu edit screen and enter a SERIAL or ID NO . for the
passive device selected before you can edit the device's calibration data.
Setup Error
The program aborted the test after attempting to verify the test setup . Ensure that all
required ETE is present, has been turned on, and is properly connected.
SORRY, but your SERIAL NUMBER must end in a NUMERIC -- This is ____.
Contact Hewlett-P ackard
Test can not be done.
Required ETE is missing. Return to the Equipment Menu and enter all ETE listed as
required for the current test.
TEST_LIST is not compatible.
A bad test list exists . Contact Hewlett-P ackard
The controller does not have sufficient memory. This software cannot load. See the
computer hardware system documentation for information on adding additional memory.
Either refer to the appropriate manual to extend the memory capability of your system, or
o-load some data to make room for the program.
The ____ at address ____ was not found on HP-IB.
When V erify HP-IB is set to ON in the P
with the address that is either missing or not set to ON.
The 436A is in lowest range, waiting 10 seconds.
The current power measurement requires the lowest power-meter range
execution will resume in 10 seconds .
The 8902A needs repair (Error 6).
There is a problem related to the HP 8902A measuring receiver . Correct the fault or return
to the Equipment Menu where you can enter a dierent model number .
Santa R osa Systems Division
Santa R osa Systems Division
arameter Menu, this error message displays the ETE
for assistance .
for assistance .
. Program
The DUT must have an HP-IB address.
Y ou attempted to leave the Equipment Menu, but the program cannot nd the
HP 70000 system at the assigned HP-IB address .
THIS COLUMN CAN NOT BE EDITED.
Y ou pressed
screen or the Equipment Menu edit screen. This column cannot be edited.
THIS IS ____ AND FOUND DUPLICATE FILES: ____.
Contact Hewlett-P ackard
This test can not be selected because of missing ETE.
Y ou were in either Multiple T ests or Repeat Multiple , then tried to select a test that has
missing ETE. This is not allowed. Check the Status column of the T
Missing ETE
2-28 Module V erication Software
NNNNNNNNNNNNNNNNNNNN
SELECT
tag next to the test name you attempted to select.
with the cursor positioned in the rst column of the Mass Storage edit
Santa R osa Systems Division
for assistance .
est Menu to verify a
Page 54
Timed Out
The program aborted the test.
WARNING: Duplicate Address
Y ou entered a duplicate HP-IB address to an item in the Equipment Menu. (Y ou may have
to scroll through the menu to nd the duplication.)
WARNING: Duplication may exclude specific tests.
Y ou assigned two generic device functions to one ETE. (F or example , the TOI test will not
be run if you assign a single HP 3335A synthesizer/level generator as both the required level
generator and the required general source .)
WARNING: String is too long. It has been truncated.
Y ou entered too many characters in a user's line of the P arameter Menu edit screen. Select
the line and enter 30 or fewer characters .
Write protected.
Y ou attempted to store data on a write-protected disk. After correcting the fault, press
4
CONTINUE
5
.
Module V erication Software 2-29
Page 55
Page 56
Before Extensive Servicing
This chapter contains information to help identify and resolve some common problems that
may occur with your RF section before extensive servicing.
Symptoms of various problems are listed at the top of each page . Most symptoms have a brief
description or explanation to help provide more insight into their cause . A possible cause for
the symptom and a checklist of possible solutions are then presented. Use this checklist as an
aid to correct the problem.
If you determine that your RF section needs further servicing and your RF section is not
experiencing any of the symptoms presented in this chapter , refer to \P erforming Related
A djustments and V erication T ests" in Chapter 4 t o determine which adjustments and
verication tests must be performed and also T able 5-1 for a list of recommended test
equipment to use when assemblies are changed, repaired, or adjusted.
3
Note
If your RF section is still in warranty , o r i f you do not wish to perform the
servicing yourself, return your RF section to a Hewlett-P
center . (Refer to \If Y ou W ant Hewlett-P ackard to Service Y our RF Section "
in Chapter 1.)
If you decide to perform the servicing yourself, prepare a static-safe work
station before you begin any servicing procedures . (Refer to \Preparing a
Static-Safe W ork Station " i n Chapter 4.)
ackard service
Before Extensive Servicing 3-1
Page 57
If the System's P ower-On Self T est F ails
Each time the HP 70000 Series modular spectrum analyzer system is turned on, the system runs
through an initializing routine (power-on self test) during which the front panel ST A TUS LEDs
on each module ash on momentarily and then turn o.
If the system passes the power-on self test, the MEASURE LED on the HP 70900B local
oscillator source begins blinking on and o (triggered by the system sweep), and the A CT LED
on front panel of each active module is turned on.
If any module fails the self test, it will not establish a link with the display . I f the front panel
LEDs on the HP 70900B local oscillator source ash on and o, it means the instrument has
failed the power-on self test.
T o solve this problem:
Check that the HP 70900B local oscillator source is powered on.
Check that the HP 70000 Series modular spectrum analyzer system display and mainframe
are plugged into the proper ac line voltage .
Check that the line socket has ac line voltage .
Check that the line voltage selector switch is set to the correct voltage for the ac line voltage
being used. The line voltage selector switch is located on the left side of the HP 70004A
color display , o n the bottom of the HP 70001A mainframe
HP 70206A system graphics display .
, o r o n the rear panel of the
Figure 3-1. Line V oltage Selector
Check the line fuse on the display or the mainframe to ensure that it is not damaged. The
line fuse is located inside the power-cord receptacle housing on the rear of the display and
mainframe . Also included in this housing is a spare fuse . The fuse is a 5 b y 2 0 m m fuse rated
at 6.3 A , 250 V ( HP part number 2110-0703). This line fuse can be used with both 120 V and
230 V line voltage .
Figure 3-2. Line Fuse Removal and Replacement
3-2 Before Extensive Servicing
Page 58
If the System's P ower-On Self T est F ails
Check the address map . (Refer to T able 3-1 .)
Check the system interconnections .
Check the A10 power supply/driver by removing the module from the mainframe
and installing it on an extender cable (HP part number 70001-60013). Remove the
outer cover of the module . Conrm that the yellow and green LEDs on the top of the
A10 power supply/driver are lit. If any of these LEDs is not lit, the A10 power supply/driver
may need servicing.
If necessary , obtain service from Hewlett-P ackard. Refer to \If Y ou W ant Hewlett-P ackard to
Service Y our RF Section " i n Chapter 1.
T able 3-1. Default HP-MSIB A ddress Map
Column 18 Column 19 Column 20
Row 7
Row 6
Row 5
Row 4
Row 3
Row 2
Row 1
Row 0
1
This includes: HP 70904A RF section , H P 70905A/B RF section ,
HP 70906A/B RF section , H P 70908A RF section , H P 70909A or
HP 70910A RF section .
2
When preamplifying the lightwave section's input signal.
3
When preamplifying the preselector's or RF section's input signal.
F or more information about addressing criteria, refer to
Installation and V erication Manual
blank HP 70310 blank
RF sections
HP 70907 HP 70301 blank
HP 70903 blank HP 70810 Option 850
HP 70911 HP 70620 or HP 70621
HP 70700 HP 70600 or HP 70601 blank
HP 70902 blank blank
HP 70900 blank blank
1
HP 70300 HP 70620 or HP 70621
.
2
3
HP 70000 Modular Spectrum Analyzer
HP 70810
Before Extensive Servicing 3-3
Page 59
If Y our HP 70908A RF Section is P owered On But Not
Responding Correctly
If the HP 70908A RF section does not complete its power-up sequence , o r i f i t causes the bus to
hang up , the following procedure may be used to help troubleshoot the problem.
T o solve this problem:
Set the mainframe line switch to OFF . Remove the RF section from the mainframe , and then
remove the left-hand side cover from the module to gain access to the A12 controller .
Install the module service extender (HP part number 70001-60013) and connect the RF
section to the extender cable .
Set the mainframe line switch to ON.
Measure the +5 V supply at A12U17 pin 3.
If +5 V i s present, there is a problem with the A12 controller .
If +5 V i s not present, remove the ribbon cable to the A14 front panel board .
Remeasure the voltage at A12U17 pin 3.
If +5 V i s present, the A14 front panel board is loading down the +5 V
If +5 V i s not present, check A12U17 pin 1 for +8 V (unregulated).
If the voltage on the A12U17 pin 1 measures +8 V
If pin 1 does not measure +8 V , refer to \Troubleshooting the A10 P ower Supply/Driver "i n
Chapter 4.
If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard to
Service Y our RF Section " i n Chapter 1.)
, there is a problem on the A12 controller .
.
3-4 Before Extensive Servicing
Page 60
If One or More Modules' Error Indicator is Flashing
If One or More Modules' Error Indicator is Flashing
The HP 70908A RF section communicates with the HP 70000 Series modular spectrum analyzer
system over the HP-MSIB . When the ST A TUS ERR indicator LED on a particular module ashes
at a 1 Hz rate , the module cannot communicate over the HP-MSIB .
T o solve this problem:
Try turning o the power to the system and then turning it on again.
If front panel keys are still responding, check the address map to see that all modules are
located in their designated coordinates .
If front panel keys are not responding and the address map cannot be checked, power-down
the system, pull out each module , and check its address setting by looking at its address
switches .
All modules should conform to the required coordinates on the address map . (Refer to
T able 3-1 .)
If your system contains more than one mainframe , check that the HP-MSIB cables are
connected such that two cable connections are made to each mainframe . I f these cable
connections look correct, you may try replacing the HP-MSIB cables with new ones
If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard to
Service Y our RF Section " i n Chapter 1.)
.
Before Extensive Servicing 3-5
Page 61
Page 62
4
Troubleshooting
This chapter contains information about troubleshooting your RF section . I t presents
information on preparing a static-safe work station and then it presents a set of troubleshooting
procedures that can be used to optimize repair time .
A djustment and verication tests that must be performed, when assemblies are changed,
repaired, or adjusted are presented at the end of the chapter .
T roubleshooting 4-1
Page 63
Preparing a Static-Safe W ork Station
Electrostatic discharge (ESD) can damage or destroy electronic components . Therefore ,
all work performed on assemblies consisting of electronic components should be done at a
static-safe work station.
Figure 4-1 shows an example of a static-safe work station. Two types of ESD protection are
shown:
a conductive table mat and wrist strap combination
a conductive oor mat and heel strap combination
These two types of ESD protection must be used together . Refer to T able 4-1 for a list of
static-safe accessories and their HP part numbers .
CA UTION
4-2 T roubleshooting
Do not touch the edge-connector contacts or trace surfaces with bare hands
Always handle board assemblies by the edges .
Do not use erasers to clean the edge-connector contacts . Erasers generate
static electricity and degrade the electrical quality of the contacts by
removing the thin gold plating.
Do not use paper of any kind to clean the edge-connector contacts .P aper or
lint particles left on the contact surface can cause intermittent electrical
connections .
Figure 4-1. Static-Safe W ork Station
.
Page 64
Preparing a Static-Safe W ork Station
Reducing ESD Damage
T o help reduce the amount of ESD damage that occurs during testing and servicing use the
following guidelines:
Be sure that all instruments are properly earth-grounded to prevent buildup of static charge .
P ersonnel should be grounded with a resistor-isolated wrist strap before touching the center
pin of any connector and before removing any assembly from a piece of equipment.
Use a resistor-isolated wrist strap that is connected to the HP 70000 Series modular spectrum
analyzer system mainframe's chassis . I f you do not have a resistor-isolated wrist strap , touch
the chassis frequently to equalize any static charge .
Before connecting any coaxial cable to an instrument connector for the rst time each day ,
momentarily
Handle all PC board assemblies and electronic components only at static-safe work stations .
Store or transport PC board assemblies and electronic components in static-shielding
containers .
PC board assembly edge-connector contacts may be cleaned by using a lintfree cloth with a
solution of 80% electronics-grade isopropyl alcohol and 20% deionized water
should be performed at a static-safe work station.
short the center and outer conductors of the cable together .
. This procedure
Static-Safe ESD A ccessories
T able 4-1. Static-Safe ESD A ccessories
HP P art
Number
9300-0797 Set includes: 3M static control mat 0.6 m
(15 ft) ground wire . (The wrist-strap and wrist-strap cord are not included.
They must be ordered separately .)
9300-0865 Ground wire , 4.6 m (15 ft)
9300-0980 Wrist-strap cord 1.5 m ( 5 ft)
9300-1367 Wrist-strap , color black, stainless steel, without cord, has four adjustable
links and a 7 m m post-type connection.
9300-1308 ESD heel-strap (reusable 6 t o 1 2 months).
Order the above by calling HP DIRECT at (800) 538-8787 or through any Hewlett-P
Sales and Service Oce .
Description
2
1 . 2 m( 2f t 2 4 ft) and 4.6 m
ackard
T roubleshooting 4-3
Page 65
If Operating Errors Messages (2000{2999) Occur
Operating errors are generated when a module in the HP 70000 Series modular spectrum
analyzer system is not used properly . These errors can occur at any time , but are most common
during remote operation. Operating errors range from 2000{2999 and are reported by the
HP 70900B local oscillator source .
The A12 controller received a command it did not recognize and caused the HP 70000 Series
modular spectrum analyzer system to display one or more of the following operating errors:
Operating error messages (2000{2999) are reported by the HP 70900B local oscillator source .
2001
2002
2006
2009
Illegal cmd
Illegal parameter
The remote command sent over the bus or executed as part of a DLP was not a legal
remote command.
T o solve this problem:
1. Use the \DEBUG ON OFF" key to turn on debug mode and determine exactly which
command is generating the error .
2. Check for missing terminators and the proper number of parameters
3. V erify that delimited strings are properly ended.
4. Refer to the programming manual for proper syntax.
P aram out of range
A change was made to an instrument setting that was beyond the capabilities of the
hardware . This could be remote , DLP , o r front panel changes .
T o solve this problem:
1. F or remote applications use \DEBUG ON OFF" key , t o verify which setting caused
the error .
2. Refer to the
Manual
Protocol error
This is an internal error due to illegal communication caused by hardware failure
HP 70000 Modular Spectrum Analyzer Installation and V erication
for descriptions of hardware capability .
.
.
T o solve this problem:
1. Document all details possible that preceded the error .
2. Obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard to
Service Y our RF Section " i n Chapter 1.)
4-4 T roubleshooting
Page 66
If Hardware Error Messages (7000{7999) Occur
If Hardware Error Messages (7000{7999) Occur
Hardware errors are generated when a module in the HP 70000 Series modular spectrum
analyzer system is not working properly . These errors can occur at any time . Hardware errors
range from 7000{7999 . Troubleshoot these errors in the order reported by the HP 70900B local
oscillator source .
One or more of the following hardware error messages may appear on your system display:
7000
7002
ROM check error
This hardware error occurs when there is a dierence between the programmed
checksum and the computed checksum for the lower half of the addresses of A12U7.
T o solve this problem:
1. Replace A12U7.
2. If problem remains , troubleshoot the A12 controller . (Refer to \Troubleshooting the
A12 Controller ".)
3. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant
Hewlett-P ackard to Service Y our RF Section " i n Chapter 1.)
1st LO unleveled
This hardware error indicates an unleveled 1st LO signal. It occurs when the voltage
at A13U4 pin 1 o n the A13 ALC/bias goes positive
it will cause the output of A13U4 to swing all the way to its positive rail. This voltage
is sent to the A12 controller where it is monitored by A12U19 (TTL low = error
condition).
T o solve this problem:
1. Check that the LO IN signal is actually getting power to the RF section. This
normally comes from the HP 70900B local oscillator source LO
should be between +4 and +12 dBm .
2. Check that the power into the A1 leveling amplier is between +4 and +12 dBm .
3. If correct, troubleshoot the A1 leveling amplier . (Refer to \Troubleshooting the
A1 Leveling Amplier ".)
4. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant
Hewlett-P ackard to Service Y our RF Section " i n Chapter 1.)
. I f that point goes slightly positive ,
. The power level
7003
2nd LO unlocked
This hardware error occurs when the voltage at A9TP1 (A9 2nd converter PLL )
exceeds a 0 8.8 V t o +8.6 V range . This voltage is sent to A12TP2-1 (A12 controller )
where it is sensed, translated to TTL, and read by the controller
at A12TP2-1 indicates a locked condition.
T o solve this problem:
1. P erform the 2nd converter alignment adjustments .
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant
Hewlett-P ackard to Service Y our RF Section " i n Chapter 1.)
. A TTL low measured
T roubleshooting 4-5
Page 67
If Hardware Error Messages (7000{7999) Occur
7004
7009
300 MHz error
This hardware error occurs when the detected level of 300 MHz at A11J2 falls below
the reference voltage set by A11CR5 (about 0.3 V). Capacitor A11C46 charges up
to a voltage proportional to the 300 MHz input power , and that voltage is sensed
at A11U4A. The output of A11U4A is sent to the A12 controller where the error
condition (TTL low) is reported to the master module of the spectrum analyzer .
T o solve this problem:
1. V erify that the 300 MHz signal is actually getting to the RF section. This normally
comes from the HP 70900B local oscillator source LO . The power level should be 0
6
2 dBm.
2. Troubleshoot the A11 last converter . (Refer to \Troubleshooting the
A11 Last Converter ".)
3. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant
Hewlett-P ackard to Service Y our RF Section " i n Chapter 1.)
ROM #2 check error
This hardware error occurs when there is a dierence between the computed
checksum and programmed checksum of the upper half of the addresses of A12U7.
T o solve this problem:
1. Replace A12U7.
2. If problem remains , troubleshoot the A12 controller . (Refer to \Troubleshooting the
A12 Controller ".)
3. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant
Hewlett-P ackard to Service Y our RF Section " i n Chapter 1.)
7033
P ower supply fault
This hardware error occurs when any of the power supply sense lines to A10U191 or
U192 fall below +2.5 V . This happens when a supply is loaded down.
T o solve this problem:
1. Troubleshoot the A10 power supply/driver . (Refer to \Troubleshooting the
A10 P ower Supply/Driver ".)
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant
Hewlett-P ackard to Service Y our RF Section " i n Chapter 1.)
4-6 T roubleshooting
Page 68
If Hardware Error Messages (7000{7999) Occur
7074
Discriminator unlock
This hardware error occurs when the power level supplied from the multiplier to the
discriminator (dierence between the LO and preselector frequencies) is greater than
the discriminator loop lock range . The A10 power supply/driver reports the error
when the voltage at A10TP1-5 exceeds the 0 10.4 V t o +10.4 V range .
T o solve this problem:
1. Isolate the problem to the HP 70900B local oscillator source or the HP 70908A
RF section .
Since the HP 70900B local oscillator source could cause frequency error , i t i s the
rst place to start troubleshooting.
Checking for HP 70900B local oscillator source failures:
Run the HP 70900B Tune + Span oset adjustment procedure for the A8
frequency control assembly .
Note the voltage displayed on the DVM and subtract it from 4.5 V before
making any adjustment (keep track of the sign of the dierence).
Make the rst adjustment. When nished, press
adjustment.
Again, note the voltage displayed on the DVM before making any adjustment.
A dd the dierence from the previous calculation to the DVM reading, and then
subtract it from 4.5 V .
If either of the dierences is greater than 11 mV , there is a problem with the
HP 70900B local oscillator source . Refer to the adjustment procedure failures
section in the
If there is no problem found using the HP 70900B Tune + Span oset adjustment
procedure , run the YTO linearity verication test in the
Guide
.
If the YTO linearity test fails , refer to the HP 70900B frequency control
reference voltage adjustments and the YTO frequency endpoints adjustment.
Then rerun the YTO linearity test.
If it still fails , refer to the YTO linearity adjustment troubleshooting section of
the
HP 70900B Service Guide
HP 70900B Service Guide
.
.
NNNNNNNNNNNNNN
DONE
to get to the other
HP 70900B Service
7076
Checking for HP 70908A RF section failures:
If both of the above procedures pass , the problem is caused by the HP 70908A
RF section . Refer to \Troubleshooting the A3 SYTFMD " and \Troubleshooting the
A10 P ower Supply/Driver ".
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant
Hewlett-P ackard to Service Y our RF Section " i n Chapter 1.)
Multiplier unleveled
This hardware error occurs when a low output is detected from the
A10 power supply/driver . The error is reported when the voltage at A13U1 pin14
(A13 ALC/bias ) i s less than +0.65 V . This voltage is sent to the
A10 power supply/driver where it is translated to TTL (TTL low = unleveled). The
TTL information is sent to the A12 controller where the error condition is reported to
the system controller .
T o solve this problem:
1. Troubleshoot the A2 LO multiplier . (Refer to \Troubleshooting the
A2 LO Multiplier ".)
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant
Hewlett-P ackard to Service Y our RF Section " i n Chapter 1.)
T roubleshooting 4-7
Page 69
If Hardware Error Messages (7000{7999) Occur
7078
Tune + Span
This hardware error occurs when the voltage at A10U17 pin 11
(A10 power supply/driver ) drops below +2.48 V . When this occurs , A10U11 pin 13
goes to a positive rail of about +11 V . This is sent to the A12 controller where the
error condition is reported.
T o solve this problem:
1. V erify that the Tune + Span signal is actually getting to the RF section .
2. If correct, check the output of A10U17 pin 13.
3. If the output is a negative voltage , there is a problem on the A12 controller . (Refer
to \Troubleshooting the A12 Controller ".)
4. If it is not a negative voltage , troubleshoot the A10 power supply/driver . (Refer to
\Troubleshooting the A10 P ower Supply/Driver ".)
4-8 T roubleshooting
Page 70
If Y ou Have A djustment Procedure F ailures
If Y ou Have A djustment Procedure F ailures
The following troubleshooting instructions are grouped according to module adjustment
procedures . I f the RF section fails an adjustment, look up the procedure in the list and follow
the instructions . Before troubleshooting, always check to ensure that the failure is not caused
by the test equipment.
If A djustment 01. LOLA Gate Bias F ails
The gate bias voltage for the A1 leveling amplier comes from the A13 ALC/bias .
T o solve this problem:
1. Troubleshoot function block G. (Refer to the A13 ALC/bias schematic diagram.)
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If A djustment 02. Multiplier Gate Bias F ails
The gate bias voltage for the A2 LO multiplier comes from the A13 ALC/bias .
T o solve this problem:
1. Troubleshoot function block B . Refer to the A13 ALC/bias schematic diagram.)
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If A djustment 03. Reference V oltage F ails
If the reference voltage cannot be adjusted within test limits
A10 power supply/driver .
T o solve this problem:
1. Troubleshoot the A10 power supply/driver .
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If A djustment 04. LOLA P ower Out F ails
If the voltage printed on the A1 leveling amplier cover cannot be obtained with an input
signal of 3 GHz at 8 dBm , the failure is most likely the A1 leveling amplier or A13 ALC/bias .
T o solve this problem:
1. Troubleshoot the A1 leveling amplier .
2. Troubleshoot the A13 ALC/bias .
3. Troubleshoot function block F . (Refer to the A13 ALC/bias schematic diagram.)
4. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
, the failure is most likely the
T roubleshooting 4-9
Page 71
If Y ou Have A djustment Procedure F ailures
If A djustment 05. LOLA Tuned Filter F ails
If A djustment 05. LOLA Tuned Filter fails , the failure is most likely the A1 leveling amplier .
P erforming A djustment 01. LOLA Gate Bias and A djustment 04. LOLA P ower Out verify that
the A1 leveling amplier stays leveled over an LO input frequency range of 3 GHz to 6.6 GHz
at power levels of +5, +8, and +12 dBm .
T o solve this problem:
1. P erform A djustment 04. LOLA P ower Out.
2. If procedure still fails , troubleshoot the A1 leveling amplier .
3. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If A djustment 06. SYTFMD Oset Coil F ails
If the oset coil current for the A3 SYTFMD cannot be adjusted within test limits , the problem
is most likely the A10 power supply/driver .
T o solve this problem:
1. Remove A10J203. Measure the resistance between pin 8 and pin 9. A measurement
between 6 t o 8 ohms indicates a good A3 oset coil.
2. Replace the A3 SYTFMD if needed.
3. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If A djustment 07. SYTFMD Main Coil Preset or A djustment 09. SYTFMD
Main Coil Alignment F ails
If either adjustment fails , analyze the failure to determine the location of the malfunction.
T o solve this problem:
1. P erform A djustment 06. SYTFMD Oset Coil.
2. If A djustment 07. SYTFMD Main Coil Preset still fails
drive in the A10 power supply/driver .
3. If the main coil drive is not the problem, troubleshoot the A3 SYTFMD .
4. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If A djustment 08. Multiplier P ower Leveling F ails
If A djustment 08. Multiplier P ower Leveling fails , analyze the failure to determine the location
of the malfunction.
T o solve this problem:
1. V erify that the input power to the A2 LO multiplier is 15 dBm .
2. If the power is not 15 dBm , troubleshoot the A1 leveling amplier .
3. If the power is 15 dBm and the adjustment cannot be made , troubleshoot the
A2 LO multiplier .
4. If the failed assembly is not located, the problem is either on the A13 ALC/bias or
A2 LO multiplier .
5. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
, refer to troubleshooting the main coil
4-10 T roubleshooting
Page 72
If 2nd Converter F ails
If 2nd Converter F ails
If any 2nd converter adjustment fails , use the following procedures to determine the cause of
the malfunction.
CA UTION
Note
If A djustment 10. V CO Tune-Line V oltage F ails
T o solve this problem:
1. If A9R7 cannot be adjusted for 0 5V , troubleshoot the A9 2nd converter PLL .
2. V erify that the A5 V CO sampler is not loading down the tune line .
3. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If A djustment 11. V CO 2nd LO Frequency/Amplitude F ails
T o solve this problem:
LO Frequency
1. If the V CO will not oscillate , check for an open electrical connection between the
A9 2nd converter PLL and the A5 V CO sampler . The connection is made using spring
contacts underneath the A9 2nd converter PLL . I f the electrical connection is good, the
voltage at A9J4 pin 2 (Vcc) will measure about +10.7 V and the voltage at A9J4 pin 3 ( V
will measure about 0 2.7 V . The assembly must be disassembled to verify the contacts for
A9J4 pin 1 and A9J2 pin 3.
2. If the V CO oscillates but cannot reach 3.3 GHz from the low side
holding the cavity block. Push the whole cavity block towards the front and bottom of the
module , and tighten the screws while holding it in that position. The positioning of the LO
cavity to the antenna probe inside the cavity is critical. Loosening the A5 V CO sampler ,
rotating it CCW , and re-tightening it may x this problem.
3. If the V CO oscillates and then jumps to some other unadjustable frequency at a lower
amplitude , center the LO adjust slug and cycle the power . This problem usually occurs when
the V CO is being adjusted away from 3.3 GHz . I t i s possible to have the bandpass lter
adjustment slugs in so far that they short out against the bottom of the casting.
4. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
The 2nd converter contains extremely static-sensitive components . Before
proceeding, refer to \Preparing a Static-Safe W ork Station ".
If the cover of the 2nd converter is removed to make an adjustment, replace
it with an HP 5022-1150 2nd converter test cover during testing to assure
consistent ground connection and proper converter alignment.
ee)
, loosen all of the screws
LO Amplitude
1. If there are two or fewer threads showing on the SMA (2ND LO OUT) connector , replace the
A5 V CO sampler .
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
T roubleshooting 4-11
Page 73
If 2nd Converter F ails
If A djustment 12. 2nd Converter LO F eedthrough F ails
T o solve this problem:
1. Refer to the A djustment 22. 2nd Converter Bandpass Filter Tune . I f the 3.3 GHz
feedthrough cannot be adjusted within specication, the failure is most likely either
C2 feedthrough cap , A 8 321.4 MHz matching network , o r A 7 2nd mixer .
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If A djustment 13. Sampler IF Out DC F ails
T o solve this problem:
1. Replace the A5 V CO sampler .
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If A djustment 14. Sampler IF Out A CF ails
T o solve this problem:
1. Replace the A5 V CO sampler .
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If A djustment 15. Search Oscillator Duty Cycle and P eriod F ails
T o solve this problem:
1. If the search oscillator does not work, the problem is most likely A9U1.
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If A djustment 16. Search Oscillator Square W ave Min/Max F ails
T o solve this problem:
1. P erform A djustment 15. Search Oscillator Duty Cycle and P eriod.
2. If this test still fails after adjusting the search oscillator , the problem is probably on the
A9 2nd converter PLL , o r there is too much ac and/or dc coming out of the A5 V CO sampler .
(Refer to the sampler ac and dc tests .)
3. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If A djustment 17. Search Oscillator Tune Line P eak F ails
T o solve this problem:
1. If A2R6 cannot be adjusted to stop the search oscillator , there is probably a problem with
the phase-lock loop .P erform the phase lock check in the following adjustment.
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
4-12 T roubleshooting
Page 74
If 2nd Converter F ails
If A djustment 18. Phase Lock Check F ails
T o solve this problem:
1. Remove the 300 MHz cable at A9J1.
2. Set the spectrum analyzer to a center frequency of 300 MHz and a span of 1 MHz. The
3.3 GHz oscillator will now be enabled.
3. Connect an oscilloscope to A9TP1. There should be a pulse with a 35% to 70% duty cycle
with the peaks about 6 9.5 V .
If the pulse is missing, troubleshoot the search oscillator and perform A djustment 15.
Search Oscillator Duty Cycle and P eriod.
If the pulse is present, phase-lock amplier A9U1 is operating correctly .
4. Measure the voltage at A9J4 pin 3. It should read about 0 2.7 V .
If it is near 0 V , check A9J2 pin 4 ( V CO Control) for a TTL high. A TTL high indicates that
the oscillator is enabled.
If the voltage on pin 4 i s not a TTL high, the V CO control signal is not correct.
Troubleshoot the A12 controller .
5. V erify that there is a 300 MHz , 3 dBm signal going into A9J1. If the signal is low or not
present, refer to troubleshooting the A11 last converter .
6. Connect a spectrum analyzer with a 1:1 probe to A9J4 pin 4 and look for a 300 MHz ,
0
10 dBm signal. The power level will depend upon the type of probe used.
If there is no 300 MHz signal present, troubleshoot the A9 2nd converter PLL .
If the 300 MHz signal is present, the A5 V
contacts are open. T o verify that the spring contacts are making a good connection, refer
to the procedure in A djustment 11. V CO 2nd LO Frequency/Amplitude .
If no failure is found, perform A djustment 11. V CO 2nd LO Frequency/Amplitude .
7. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
CO sampler is probably at fault or the spring
If A djustment 19. V CO Tune Range Preliminary Check F ails
T o solve this problem:
1. If the V CO cannot be adjusted to remain locked at the extremes
Search Oscillator Square W ave Min/Max passes , there is a problem on the A5 V
2. If A djustment 16. Search Oscillator Square W ave Min/Max fails , there is a problem with the
A9 2nd converter PLL .
3. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If A djustment 20. Lock Range Measurement F ails
T o solve this problem:
1. P erform A djustment 19. V CO Tune Range Preliminary Check.
2. If the adjustment cannot be performed, refer to the preceding V CO tune range preliminary
adjustment failure information and \Troubleshooting and Alignment of the A5, A7, A8, A9".
3. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
, and if A djustment 16.
CO sampler .
T roubleshooting 4-13
Page 75
If 2nd Converter F ails
If A djustment 21. Mixer Bias F ails
T o solve this problem:
1. P erform A djustment 11. V CO 2nd LO Frequency/Amplitude .
2. If A djustment 11. V CO 2nd LO Frequency/Amplitude passes , the problem is probably either
feedthrough capacitor C1 or the A7 2nd mixer diode . The A8 321.4 MHz matching network
can also cause this to fail.
3. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If A djustment 22. 2nd Converter Bandpass Filter Tune F ails
T o solve this problem:
1. If the bandpass response is greatly over-coupled or under-coupled and cannot be adjusted
at, the IF input SMA connector may be screwed in too far or not far enough.
F eedthrough capacitor C1 (from the mixing diode to the matching network) can aect the
bandpass shape . I t i s usually manifest by a skewing of the bandpass to one side or another ,
and higher-than-normal conversion loss .
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If A djustment 23. V CO Tune Range Final F ails
T o solve this problem:
1. If the V CO cannot be adjusted so that it remains locked at the extremes
16. Search Oscillator Square W ave Min/Max passes , the problem is probably on the
A5 V CO sampler .
2. If the A djustment 16. Search Oscillator Square W ave Min/Max fails , then the problem is on
the A9 2nd converter PLL .
3. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
, and if A djustment
4-14 T roubleshooting
Page 76
If Y ou Have A djustments Procedure F ailures
If Y ou Have A djustments Procedure F ailures
If A djustment 24. Last Converter Bandpass Filter F ails
After
any
repair or replacement of the last converter , run this test to help adjust and verify
last converter alignment.
T o solve this problem:
1. V erify that the 2nd converter bandpass lter is adjusted properly .
2. Troubleshoot the A11 last converter . Refer to \Troubleshooting the A11 Last Converter ".
3. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If A djustment 25. Noise Figure Last Converter F ails
After
any
repair or replacement of the last converter , run this test to verify the noise gure of
the last converter .
T o solve this problem:
1. V erify that the 2nd converter bandpass lter is adjusted properly
2. Troubleshoot the A11 last converter . Refer to \Troubleshooting the A11 Last Converter ".
3. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If A djustment 26. Noise Figure 2nd Converter F ails
T o solve this problem:
1. Unless the A djustment 11. V CO 2nd LO Frequency/Amplitude also fails , the problem is
usually the A7 2nd mixer diode .
2. A poorly-tuned bandpass lter can also cause this test to fail.
3. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If A djustment 27. 21.4 MHz IF Frequency Response F ails
This test veries correct alignment of the 2nd converter , SYTFMD , and last converter at
300 MHz in 1H 0 band and at 2.7 GHz in 1L 0 band.
T o solve this problem:
1. If the test fails , troubleshoot the A11 last converter . Refer to \Troubleshooting the
A11 Last Converter ".
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
.
T roubleshooting 4-15
Page 77
If Y ou Have V erication T est F ailures
The following troubleshooting instructions are grouped according to module verication tests .
If the RF section fails a verication test, look up the test in the list and follow the instructions .
Before troubleshooting, always check to ensure that the failure is not caused by the test
equipment.
If T est 01. Flatness or T est 02. Low Frequency Flatness < 10 MHz F ails
If any atness calibration and verication routines fail, analyze the failure to determine the
location of the malfunction.
T o solve this problem:
1. If the failure occurs in band 1H 0 (100 Hz to 2.9 GHz), anything between the RF input
connector and the A11 last converter can cause the problem. V erify that there is a 1 5 dBm
LO output signal going into the A15 RF 1st converter LO input jack at the failing center
frequency . I f the LO signal is missing, troubleshoot the A1 leveling amplier . Also check
the A9 2nd converter PLL . (Refer to \Troubleshooting the A1 Leveling Amplier " and
\Troubleshooting and Alignment of the A5, A7, A8, A9".
2. If the failure is not frequency-dependent but exists across the entire band, check the
A4 input attenuator and IF paths for high conversion or insertion loss
0
3. If the failure occurs in bands 1L
signal from the multiplier to the A3 SYTFMD is 14 dBm (+12.5 dBm in 4L
not, troubleshoot the A2 LO multiplier . (Refer to \Troubleshooting the A2 LO Multiplier ".)
Anything between the RF input connector and the A3 SYTFMD can cause a failure in these
bands .
4. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
,2 L 0 ,o r 4 L 0 (2.7 to 22 GHz), verify that the LO input
.
0
band). If it is
If T est 03. Attenuator A ccuracy F ails
If any attenuator accuracy routines fail, the failure must be analyzed to determine the location
of the malfunction.
T o solve this problem:
1. If the failure is greater than 8 d B , troubleshoot the A12 controller circuitry
(A12U8, U9, U20) .
2. If the failure is less than 8 d B o r i f the A12 controller is not at fault, troubleshoot the
A4 input attenuator .
3. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If T est 04. Front P anel LEDs F ails
If any front panel LED routines fail, the failure is most likely on the A12 controller .
T o solve this problem:
1. Check that A14 front panel board is receiving signals from the A12 controller (A12J7).
2. Check that transistors A12Q1 and Q2 have +0.7 V a t the emitter when the LEDs are on.
3. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
4-16 T roubleshooting
Page 78
If Y ou Have V erication T est F ailures
If T est 05. 10.7 MHz Rejection F ails
If any 10.7 MHz rejection routines fail, the problem is most likely the A11 last converter
321.4 MHz bandpass lter or 10.7 MHz trap (A11C28, A11L10).
T o solve this problem:
1. Troubleshoot the A11 last converter .
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If T est 06. F eedthrough Out 21.4 MHz P ort F ails
If any 21.4 MHz output feedthrough routines fail, the failure is most likely the lters in the IF
path.
T o solve this problem:
1. Check the stop-band response of all the lters in the IF path.
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If T est 07. Harmonics Out 21.4 MHz P ort F ails
This test checks the overall lter response of the HP 70908A RF section IF output.
If any 21.4 MHz output harmonics routines fail, the failure is most likely caused by
A11 last converter .
T o solve this problem:
1. Check that no RFI gaskets are missing from covers and underneath printed circuit boards
2. If test falls within the test limits of the 21.4 MHz output port, troubleshoot the
A11 last converter . (Refer to \Troubleshooting the A11 Last Converter ".)
3. If test does not fall within the test limits
found.
4. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If T est 08. Residual Emissions Out 21.4 MHz P ort F ails
This test checks for N x 300 MHz and LO feedthrough emissions from the rear panel 21.4 MHz
output.
If any 21.4 MHz output residual emissions response routines fail, analyze the failure to
determine the location of the malfunction.
T o solve this problem:
1. If the N x 300 MHz emissions test fails , troubleshoot the A11 last converter (either the
diplexer circuit out of the mixer or the 21.4 MHz output bandpass lter). Ensure that the
polyiron gasket is installed in the A11 last converter casting.
2. If the LO feedthrough test fails , verify that the LO signal is 15 dBm at the input of
A15 RF 1st converter .
3. If the power level is correct, replace the A15 RF 1st converter .
4. If the power is too high, perform A
5. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
, check the IF path until the faulty assembly is
djustment 04. LOLA P ower Out.
.
T roubleshooting 4-17
Page 79
If Y ou Have V erication T est F ailures
If T est 09. Image Rejection F ails
If any image rejection routines fail, the failure is most likely poor stopband response in one of
the lters in the signal path.
T o solve this problem:
1. Check for cracked solder joints on cables , loose connectors , and bad grounds (radiated).
2. Check the stop-band response of all the lters in the signal path.
3. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If T est 10. IF Rejection F ails
T o solve this problem:
1. Check signal rejection in the IF path until the faulty assembly is found.
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If T est 11. 2nd Converter Startup F
T o solve this problem:
1. If any 2nd converter startup verication routines fail, perform
A djustment 22. 2nd Converter Bandpass Filter Tune .
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If T est 12. IF Sub-Harmonics F ails
T o solve this problem:
1. Troubleshoot the A11 last converter 10.7 MHz trap (A11L10, A11C28) and 321.4 MHz
bandpass lter .
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If T est 13. Residual Responses F ails
If any residual responses routines fail, the failure is most likely caused by a harmonic of the 1st
LO mixing with a harmonic of the 3.3 GHz oscillator to produce a signal at an IF frequency .
T o solve this problem:
1. Check modules for cracked solder joints on cables
attaching printed-circuit boards and covers .
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
ails
, loose connectors , and loose screws
4-18 T roubleshooting
Page 80
If Y ou Have V erication T est F ailures
If T est 14. Miscellaneous Residual Responses F ails
This verication test checks for specic known residuals .
If any miscellaneous residual responses routines fail, the failure must be analyzed to determine
the location of the malfunction.
T o solve this problem:
1. Remove the A4 input attenuator ribbon cable from the A12 controller . I f the residual
disappears , replace the A4 input attenuator .
2. F or N x 300 MHz residuals , verify that the \D" shaped chromerics and the RFI gasket,
located in the grooves of the A9 2nd converter PLL cover , have no discontinuities . Ensure
that the polyiron gasket is installed in the A11 last converter casting.
3. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If T est 15. 321.4 MHz IF Out Frequency Response F ails
The usual cause of test failure in 1H 0 band is 2nd-converter bandpass-lter alignment. F ailures
in the 1L 0 band may be caused by YTF tracking of the A3 SYTFMD .
If any 321.4 MHz output frequency response routines fail, the failure must be analyzed to
determine the location of the malfunction.
T o solve this problem:
1. If 1H 0 band fails , perform A djustment 22. 2nd Converter Bandpass Filter Tune .
2. If 1L 0 band fails , perform A djustment 06. SYTFMD Oset Coil and A djustment 09. SYTFMD
Main Coil Alignment.
3. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If T est 16. 21.4 MHz IF Frequency Response F ails
This test checks the overall lter response of the RF section IF output. At 300 MHz in 1H
band and at 6.0 GHz in 1L 0 band, the test veries correct alignment of the A3 SYTFMD ,
A9 2nd converter PLL , and A11 last converter .
The response is normally a function of the 321.4 MHz bandpass lter on the A11 last converter .
However , i f any lters before the A11 last converter are not correct, this test can fail.
If any 21.4 MHz output frequency response routines fail, analyze the failure to determine the
location of the malfunction.
T o solve this problem:
1. Check that the RFI gaskets are not missing from covers or underneath printed circuit boards
2. Check the output response of the 321.4 MHz at the rear panel jack.
3. If the response falls within the test limits of the 21.4 MHz output port, troubleshoot the
A11 last converter .
4. If the response does not fall within the test limits of the 21.4 MHz output port, check the IF
path until the faulty assembly is found.
5. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
0
.
T roubleshooting 4-19
Page 81
If Y ou Have V erication T est F ailures
If T est 17. Step Gain F ails
If any step gain routines fail, the failure is most likely caused by A11 last converter .
T o solve this problem:
1. P erform A djustment 24. Last Converter Bandpass Filter .
2. If the test still fails , troubleshoot the A11 last converter . (Refer to \Troubleshooting the
A11 Last Converter ").
3. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If T est 18. Gain Compression F ails
If any gain compression routines fail, the failure is most likely caused by A11 last converter .
T o solve this problem:
1. Check the IF output at the rear panel 321.4 MHz output port. (The 321.4 MHz output must
be enabled.)
2. If gain compression cannot be seen at that port, troubleshoot the A11 last converter .
3. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If T est 19. A ux LO P ower and Harmonics F ails
If any LO output power and harmonics routines fail, the failure is most likely caused by
A1 leveling amplier .
T o solve this problem:
1. P erform A djustment 01. LOLA Gate Bias ,A djustment 04. LOLA P ower Out, and A djustment
05. LOLA Tuned Filter .
2. If the test still fails its limits , troubleshoot the A1 leveling amplier .
3. If A1J3 or A1J4 are heavily loaded down, this test may also fail.
4. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If T est 20. Diagnostics F ails
In order to run this test, all loops must be able to lock and all error bits must show no errors .
In general, this test causes conditions that toggle each error-reporting bit from a \no error" to
\error" state . The power supply fault bit is not tested.
Use the following information when troubleshooting this failure
LO unleveled
This test veries that the LO leveling loop is leveled with a 5 dBm LO input power to the
HP 70908A RF section and that it is unleveled with a power less than 5 dBm .
T o solve this problem:
.
1. Troubleshoot a 7002 error code .
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
4-20 T roubleshooting
Page 82
If Y ou Have V erication T est F ailures
Multiplier unleveled
This test veries that the multiplier leveling loop is leveled with a 5 dBm LO input power to
the HP 70908A RF section and that it is unleveled with a power less than 5 dBm .
T o solve this problem:
1. Troubleshoot a 7076 error code .
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
21.4 MHz detector
This test veries the operation of the 21.4 MHz detector on the A11 last converter . I t also tests
the error-reporting circuits on the A10 power supply/driver and the A12 controller . Both
321.4 MHz inputs to the A11 last converter are tested.
T o solve this problem:
1. Troubleshoot the A11 last converter . (Refer to \Troubleshooting the A11 Last Converter ".)
2. Troubleshoot the A10 power supply/driver . (Refer to \Troubleshooting the
A10 P ower Supply/Driver ".)
3. Troubleshoot the A12 controller . (Refer to \Troubleshooting the A12 Controller ".)
4. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
300 MHz present
This test veries the operation of the 300 MHz detector on the A11 last converter . I t also tests
the error-reporting circuits on the A10 power supply/driver and the A12 controller .
T o solve this problem:
1. Troubleshoot a 7004 error code .
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
Discriminator unlock
This test veries the operation of the discriminator lock loop and the error-reporting circuits on
the A10 power supply/driver and the A12 controller .
T o solve this problem:
1. Troubleshoot a 7074 error code .
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
Tune + Span present
This test veries the operation of the Tune + Span detector
+4.5 V t o +9.9 V signal from the HP 70900A/B local oscillator source . The signal is
proportional to the 3 t o 6.6 GHz LO output frequency (1.5 V/GHz) .
T o solve this problem:
1. Troubleshoot a 7078 error code .
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
. Tune + Span is a
T roubleshooting 4-21
Page 83
If Y ou Have V erication T est F ailures
2nd LO unlocked
This test veries the operation of the A9 2nd converter PLL unlock detector and the unlock
reporting circuits on the A10 power supply/driver and A12 controller .
T o solve this problem:
1. Troubleshoot a 7003 error code .
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If T est 21. LO Input Amplitude Range F ails
If any LO input amplitude range routines fail, the failure is most likely caused by
A1 leveling amplier .
T o solve this problem:
1. P erform A djustment 01. LOLA Gate Bias ,A djustment 04. LOLA P ower Out, and A djustment
05. LOLA Tuned Filter .
2. If LO input amplitude range routines still fail, refer to troubleshooting the
A1 leveling amplier .
3. The test may also fail if either A1J3 or A1J4 are heavily loaded down.
4. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If T est 22. RF Input Emissions F ails
This test measures the LO emissions at the front panel RF INPUT
routines fail, the failure must be analyzed to determine the location of the malfunction.
T o solve this problem:
0
1. If the failure occurs in band 1H
\Troubleshooting the A15 RF 1st Converter ".)
2. If the failure occurs in bands 1L 0 ,2 L 0 , and 4L 0 , troubleshoot the A3 SYTFMD . (Refer to
\Troubleshooting the A3 SYTFMD ".)
3. If test results are degraded by 10 dB , troubleshoot the A4 input attenuator . (Refer to
\Troubleshooting the A4 Input Attenuator ".)
4. Check the LO to RF isolation of the A15 RF 1st converter .
5. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If T est 23. RF Input Return Loss F ails
If any RF input return loss routines fail, the failure must be analyzed to determine the location
of the malfunction.
T o solve this problem:
1. Troubleshoot the A4 input attenuator . (Refer to \Troubleshooting the
A4 Input Attenuator ".)
2. If failures are from .0000001 to 2.9 GHz, check everything between and including the RF
input connector and the A15 RF 1st converter .
3. If failures are from 2.9 to 22 GHz, check everything between and including the RF input
connector and the A3 SYTFMD .
4. Use the block diagram to determine which troubleshooting procedures to perform.
5. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
, troubleshoot the A15 RF 1st converter . (Refer to
. I f any RF input emissions
4-22 T roubleshooting
Page 84
If Y ou Have V erication T est F ailures
If T est 24. LO Output Return Loss F ails
If any LO output return loss routines fail, the failure can be anything between and including
A1 leveling amplier A UX jack and the rear panel LO input.
T o solve this problem:
1. Use the block diagram to determine which troubleshooting procedures to perform.
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If T est 25. LO Input Return Loss F ails
If any LO input return loss routines fail, the failure can be anything between and including the
A1 leveling amplier and the rear panel LO input.
T o solve this problem:
1. Use the block diagram to determine which troubleshooting procedures to perform.
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If T est 26. Reference Return Loss F ails
If any 300 MHz reference input return loss routines fail, the failure is most likely the
A11 last converter
T o solve this problem:
1. Troubleshoot the A11 last converter . (Refer to \Troubleshooting the A11 Last Converter ".)
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If T est 27. Wide IF Output Return Loss F ails
If any LO input return loss routines fail, the failure can be anything between and including the
A11 last converter and the rear panel 321.4 MHz output.
T o solve this problem:
1. Use the block diagram to determine which troubleshooting procedures to perform.
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
If T est 28. Narrow IF Output Return Loss F ails
If any 21.4 MHz output return loss routines fail, the failure is most likely the
A11 last converter .
T o solve this problem:
1. Troubleshoot the A11 last converter . (Refer to \Troubleshooting the A11 Last Converter ".)
2. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
T roubleshooting 4-23
Page 85
If Y ou Have V erication T est F ailures
If T est 29. Noise Figure F ails
Noise gure failures can be traced to two causes: high conversion/insertion loss , o r excess noise
addition in the signal path.
T o solve this problem:
1. V erify that the cables are not causing the problem.
2. T o isolate the problem, run A djustment 26. Noise Figure 2nd Converter .
3. If this adjustment test fails , perform A djustment 25. Noise Figure Last Converter .
4. If A djustment 25. Noise Figure Last Converter passes , the problem is probably the
A15 RF 1st Converter . (Refer to \Troubleshooting the A15 RF 1st Converter ".)
5. High insertion loss of either the 321.4 MHz bandpass lter or the 1st IF lowpass lter may
also be causing the failure .
6. If necessary , obtain service from Hewlett-P ackard. (Refer to \If Y ou W ant Hewlett-P ackard
to Service Y our RF Section " i n Chapter 1.)
4-24 T roubleshooting
Page 86
Troubleshooting the A1 Leveling Amplier
Troubleshooting the A1 Leveling Amplier
The A1 leveling amplier amplies the 3 t o 6.6 GHz, +4 to 12 dBm LO signal from the
HP 70900A/B local oscillator source and levels the output at 15 dBm . A tunable 6 t o 8 GHz
notch lter removes the 3 t o 4 GHz LO 2nd harmonic . Two internal switches direct the LO
signal to either the A2 LO multiplier or A15 RF 1st converter .
This section contains the following troubleshooting information:
P ower Supply/Bias
V oltage Reference
Internal Switches
P ower Detector
LO Harmonics
Filter Drive W aveform
CA UTION
P ower Supply/Bias
The A1 leveling amplier uses +7 V for Vdd. The gate bias (G1, G2, G3) comes from the
A13 ALC/bias . P erform A djustment 01. LOLA Gate Bias ,A djustment 04. LOLA P ower Out,
and A djustment 05. LOLA Tuned Filter . I f the power out of the A1 leveling amplier is not
15 dBm , o r i f the LOLA still goes unleveled, there is a problem with the A1 leveling amplier .
V oltage Reference
The voltage reference out of the A1 leveling amplier should be a nominal
of this reference is to track the temperature coecient of the detector diode of the leveling
amplier . Its absolute accuracy is not important.
Internal Switches
The voltage that controls the internal switches comes from the A13 ALC/bias . Refer to
T able 4-2 for switch control voltages . Measure the voltages on the top of the assembly .
The A1 leveling amplier is extremely static-sensitive . Before proceeding, refer
to \Preparing a Static-Safe W ork Station ".
0
0.3 V . The purpose
T able 4-2. A1 Switch Control V oltages
Band Frequency
Range (GHz)
1H
1L
2L
4L
0
0
0
0
.0000001 to 2.9
2.7 to 6.2 +11 V
6.0 to 12.8 +11 V
12.6 to 22 +11 V
Switch 1
(SW1)
0
11 V +11 V A1J3
Switch 2
(SW2)
0
11 V A1J4
0
11 V A1J4
0
11 V A1J4
Signal Out
T roubleshooting 4-25
Page 87
Troubleshooting the A1 Leveling Amplier
P ower Detector
The power-sensing detector has positive detection with negative bias for increased sensitivity .
T o verify the operation of the detector , monitor the A1 DET pin with a DVM (digital voltmeter).
Remove the LO input cable from the rear panel of the module while observing the voltage . The
voltage should go more negative when the LO power is removed.
The detected power out is sent to the A13 ALC/bias , where the dierence between the
reference and the detected output is integrated. The integrated output is sent back to the
A1 leveling amplier A TTEN input. As LO input power to the A1 increases , pin 2 drive linearly
decreases until A13Q9 is biased o. This leaves a constant current that is proportional to
maximum attenuation through PIN diode 2. PIN diode 1 responds to the smaller input power
changes . Refer to A13 ALC/bias troubleshooting for verifying the leveling loop-drive circuitry .
LO Harmonics
The A1 leveling amplier also provides the rear panel 3 t o 6.6 GHz LO output that is
unleveled at +5 to 10 dBm . Harmonics of the LO signal to the A3 SYTFMD or to the
A15 RF 1st converter should be less than 0 25 dB c . Harmonics of the rear panel 3 t o 6.6 GHz
LO signal should be less than 0 20 dBc .
Filter Drive W aveform
The lter drive comes from the A10 power supply/driver
place the module on an HP 70001-60013 extender module and make all connections needed for
spectrum analyzer operation. P erform the following steps:
1. On the HP 70000 Series modular spectrum analyzer system, initiate an instrument preset
and set the controls as follows:
Span
:: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :
P athlock
LO ST ART
LO STOP
Sweep time
2. Set an oscilloscope to the following settings:
Display
Channel A
Channel B
3. Connect channel A o n the oscilloscope to the VTF pin on the A1 leveling amplier . Connect
channel B t o the rear panel SWP jack of the HP 70900A/B local oscillator source .A djust
the horizontal position of the the oscilloscope to place the start of the trace at the left-most
graticule .A djust the position of channel so that 0 V is one division above the bottom of the
CRT .
4. The lter drive waveform should look like Figure 4-2 , with the horizontal axis corresponding
to the LO frequency and the vertical axis to waveform amplitude .F or an HP 70900A/B
local oscillator source sweep of 3.0214 to 6.5214 GHz the waveform should have a squared
response approximately +6 V t o +26 V , remaining at +26 V for the remainder of the sweep .
If there is a problem with the lter drive , refer to A10 power supply/driver troubleshooting.
:: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: ::
:: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: ::
::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :
::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: ::
:: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: :::
: : : : : : : ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :
: : : : : ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :
.T o observe the lter drive waveform,
NNNNNNNNNNNNNN
SPAN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
,
PATHLOK ON
NNNNNNNNNNNNNNNNN
,
START
NNNNNNNNNNNNNN
STOP
NNNNNNNNNNNNNNNNNNNNNNN
,
SWPTIME
A v s B mode
ON (press
3 GHz (press
5 s (press
0 H z (press
4
MENU
4
MENU
6.6 GHz (press
4
MENU
NNNNNNNNNNNNNNNNNNNN
5
,
config
NNNNNNNNNNNNNN
5
,
Freq
NNNNNNNNNNNNNNNNNNNN
5
,
BW,Swp
0.5 V/Div (with 10:1 Probe)
0.1 V/Div (with 10:1 Probe)
,3
, 6.6
,0
,5
NNNNNNNN
Hz
NNNNNNNNNNN
GHz
NNNNNNNNNNN
GHz
NNNNN
s
)
)
)
)
)
4-26 T roubleshooting
Page 88
Troubleshooting the A1 Leveling Amplier
Figure 4-2. Notch-Filter W aveform
T roubleshooting 4-27
Page 89
Troubleshooting the A2 LO Multiplier
The purpose of the A2 LO multiplier is to provide a leveled 3.0214 to 22.3214 GHz fundamental
LO signal to mix RF input signals down to the IF frequency . The output is a nominal 14 dBm
for an LO input signal of 15 dBm , 3 to 6.6 GHz . The A2 LO multiplier contains doublers , lters ,
and amplier stages that are switched in as needed to produce the desired LO frequency .
F or band 1L 0 (2.7 to 6.2 GHz) a 4 GHz lowpass lter is switched in the LO signal path when the
A2 output signal is between 3 GHz to 4 GHz. The lter is switched out for output frequencies
greater than 4 GHz.
F or band 2L 0 (6.0 to 12.8 GHz) an 8 GHz lowpass lter is switched in after the rst frequency
doubler . I t i s switched out for A2 output frequencies greater than 8 GHz.
F or band 4L 0 (12.6 to 22 GHz) a 6.4 to 11.2 GHz bandpass lter , a doubler , and a 12.8 to
22.3 GHz bandpass lter are added to the signal path.
CA UTION
Switch Control
Refer to T able 4-3 for control voltages for the internal switches of the A2 LO multiplier .
If the output power is incorrect, but the switch voltages are correct, refer to
A djustment 08. Multiplier P ower Leveling . I f the switch voltages are incorrect, refer to
A13 ALC/bias troubleshooting.
P ower Supply/Bias
The A2 LO multiplier uses +4 V (four places), +5 V , + 7 V (two places), and +8 V t o power the
ampliers , lters , and doublers . The gate bias comes from the A13 ALC/bias . These voltages
can be veried by running the A djustment 02. Multiplier Gate Bias . The voltage reference
should be a nominal +0.2 V when the 2 t o 2 2 GHz path is selected. The purpose of this
reference is to track the temperature coecient of the detector diode
not important.
The A2 LO multiplier is extremely static-sensitive . Before proceeding, refer to
\Preparing a Static-Safe W ork Station ".
T able 4-3. A2 Switch Logic
Band Frequency
Range (GHz)
1H
1L
2L
4L
0
0
0
0
.0000001 to 2.9 0V 0V 0V
2.7 to 6.2 +12 V 0V 0V
6.0 to 12.8 0V +12 V 0V
12.6 to 22 0V 0V +12 V
Switch 1
(S1, pin 5)
Switch 2
(S2, pin 9)
Switch 3
(S3, pin 11)
. Its absolute accuracy is
P ower Detector/Leveling
The power-sensing detector uses negative detection with a slight positive bias for increased
sensitivity .T o verify detector operation, monitor the A2 DET pin with a DVM. Observe the
DVM while removing the LO input cable from the rear panel of the module . The voltage should
move more positive when the LO signal is removed.
The leveling drive circuitry is on the A13 ALC/bias . Refer to A13 ALC/bias troubleshooting for
drive circuitry verication.
4-28 T roubleshooting
Page 90
Troubleshooting the A2 LO Multiplier
Pin Attenuator
T o verify the operation of the A2 pin attenuator , connect a jumper from the A2 REF pin to
ground and connect a power meter to A2J2. The jumper causes maximum power output from
A2J2. Removing the jumper should cause the power to decrease .
Bandpass-Filter Drive
The bandpass lter is a voltage-tuned lter whose drive voltage comes from the
A10 power supply/driver .T o observe the drive waveform of the lter , perform the following
steps:
1. On the HP 70000 Series modular spectrum analyzer system, initiate an
set its controls as follows:
Span
: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :
P athlock
LO ST ART
LO STOP
Sweep time
2. Set an oscilloscope to the following settings:
Display
Channel A
Channel B
3. Connect channel A o f the oscilloscope to the A2 FL
SWP jack on the HP 70900A/B local oscillator source rear panel. A
position on the oscilloscope to place the start of the trace at the leftmost graticule
4. The drive waveform should look like Figure 4-3 , with the horizontal axis corresponding to
LO frequency and the vertical axis to the waveform amplitude
should be about +9 V a t the beginning of each band, quickly sweep to +12 V
to 0 V for the remainder of the sweep
for circuit verication.
:: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::
: : : : : : : ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::
: : : : : ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :
: : : : : ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :
: : : : : : : ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: ::
: : : ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: :::
: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: ::
. Refer to A10 power supply/driver troubleshooting
ON (press
3 GHz (press
5 s (press
TR pin. Connect channel B t o the
4
MENU
4
MENU
6.6 GHz (press
4
MENU
. The voltage to the lter
4
Instrument Preset
0 H z (press
NNNNNNNNNNNNNNNNNNNN
5
,
config
NNNNNNNNNNNNNN
5
,
Freq
NNNNNNNNNNNNNNNNNNNN
5
,
BW,Swp
0.5 V/Div (with 10:1 Probe)
0.1 V/Div (with 10:1 Probe)
djust the horizontal
,
NNNNNNNNNNNNNNNNN
,
START
NNNNNNNNNNNNNN
STOP
NNNNNNNNNNNNNNNNNNNNNNN
,
SWPTIME
, and then drop
5
, and
NNNNNNNNNNNNNN
SPAN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
,0
PATHLOK ON
NNNNNNNNNNN
,3
NNNNNNNNNNN
, 6.6
,5
A v s B mode
.
NNNNNNNN
Hz
GHz
GHz
NNNNN
)
)
)
)
s
)
Figure 4-3. Bandpass-Filter Drive W aveform
T roubleshooting 4-29
Page 91
Troubleshooting the A2 LO Multiplier
Troubleshooting the A3 SYTFMD
The A3 SYTFMD provides RF preselection for input signals of 2.7 to 22 GHz. The A3 SYTFMD
also down-converts 2.7 to 22 GHz input signals , resulting in a 1st IF of 321.4 MHz .
RF preselection is accomplished using a tunable RF bandpass lter and a tunable LO bandpass
lter . Refer to the overall block diagram. The LO bandpass lter is used to keep the RF
bandpass lter tuned to the input frequency of the analyzer . A feedback circuit, partially on
the A10 power supply/driver , ensures that the LO bandpass lter tracks the LO frequency .
Because the RF bandpass lter is tuned by the same tune line as the LO bandpass lter , any
frequency change in the LO bandpass lter will be tracked by the RF bandpass lter .A n
additional tune current is applied to the LO bandpass lter to compensate for the 321.4 MHz
oset between the LO and RF input frequencies .
The feedback circuit of the LO bandpass lter works by tuning the center frequency of
the lter to maintain a constant 90 degrees of phase shift. (The phase shift caused by
a lter will change as a signal is swept through its bandpass .) The LO signal gates the
phase-shifted LO signal through a diode pair . The resulting tune signal leaves the A3 SYTFMD
at A3J11 and is amplied and integrated by the A10 power supply/driver . I t then leaves the
A10 power supply/driver at J203 and is applied to the LO bandpass lter tune line . Because the
tune line changes the center frequency of the lter to maintain a 90-degree phase shift, the
center frequency will always track the LO frequency .
Information on the following topics is included in this section:
Mixer Conversion Loss/BW
PIN Switch V oltage
Discriminator Output Amplitude
Discriminator Output W aveform
CA UTION
Mixer Conversion Loss/B W
T able 4-4 lists preselected-mixer conversion and insertion loss values for the A3 SYTFMD .
In band 1H 0 , 100 Hz to 2.9 GHz, the signal passes unconverted through the assembly . The
insertion loss should not exceed the value given in the table . I n bands 1L 0 ,2 L 0 , and 4L 0 ,
2.7 GHz to 22 GHz , the signal is converted with the typical loss values listed in the table . The
3 d B bandwidth of the lter should typically be 17 to 50 MHz .
The A3 SYTFMD is extremely static-sensitive . Before proceeding, refer to
\Preparing a Static-Safe W ork Station ".
T able 4-4. Typical Conversion/Insertion Loss V alues
Band Frequency
Range (GHz)
1H
1L
2L
4L
0
0
0
0
.0000001 to 2.9
2.7 to 6.2
6.0 to 12.8
12.6 to 22
Input Signal
Level (dBm)
0
8 | 2
0
20 17 |
0
20 17 |
0
20 16 |
Conversion
Loss (dB)
Insertion
Loss (dB)
4-30 T roubleshooting
Page 92
Troubleshooting the A3 SYTFMD
Pin Switch V oltage
The pin switch voltage should typically be 0 4.5 V when an IF output of 321.4 MHz is directed
out A3J10. The voltage should be about +12 V when an output of 100 MHz to 2.9 GHz is
directed out A3J9. If the voltages are incorrect, perform the following steps:
N
1.
On the HP 70000 Series modular spectrum analyzer system press
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
MORE 1 o f 3
the analyzer .
2. Remove the A3 SYTFMD control cable from A10J203 and turn the power back on.
3. Check A10J203 pin 4 for about 0 11.4 V (bands 1L 0 ,2 L 0 ,4 L 0 ) and +12 V (band 1H 0 ). If
these voltages are not correct, refer to A10 power supply/driver troubleshooting. If they are
correct, there is a problem with the A3 SYTFMD . Turn the spectrum analyzer o before
replacing the connector to A10J203.
Discriminator Output Amplitude
Before troubleshooting, perform A djustment 06. SYTFMD Oset Coil and A djustment 07.
SYTFMD Main Coil Preset.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
,
MORE 2 o f 3
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
,
MORE 3 o f 3
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
, and
POWERON LAST
4
MENU
. Turn o the power on
5
,
NNNNNNNNNNNNNNNN
State
,
CA UTION
P erform the following procedure to verify that the output of the discriminator is greater than
0.2 V peak to peak into a 10k ohm load when swept through its range:
1. On the HP 70000 Series modular spectrum analyzer system, initiate an
set its controls as follows:
Start frequency
Sweep time
2. Set an oscilloscope to the following settings:
Display
Channel A
Channel B
Channel B Gain
3. Construct a test connector using the Hewlett-P ackard parts listed below . Snap the RF
adapter and RF connector together as illustrated in Figure 4-4 . Solder the 10k ohm resistor
across the outer- and center-conductor posts of the RF connector .
RF adapter
RF connector:
Resistor: 10k ohm, 0.1%, .125W
The discriminator is extremely static-sensitive . Before proceeding, refer to
\Preparing a Static-Safe W ork Station ".
4
Instrument Preset
:: ::: :: :: :: :: ::: :: :: :: ::: :: :
:: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: ::
: : : : : : : ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: ::
:: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :
: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: ::
: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: :
:: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: ::
: : : : : ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: :::
: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :
2.9 GHz (press
30 s (press
4
MENU
4
MENU
HP 1250-1391 50 SMB tee(m) (f) (m)
NNNNNNNNNNNNNN
5
],
Freq
NNNNNNNNNNNNNNNNNNNN
5
,
BW,Swp
0.01 V/Div (with 10:1 Probe)
0.1 V/Div (with 10:1 Probe)
A dj. for full screen trace
NNNNNNNNNNNNNNNNN
,
START
NNNNNNNNNNNNNNNNNNNNNNN
,
SWPTIME
A v s B mode
HP 1250-0543 SMB(m)
HP 0698-6360
5
, 2.9
, and
NNNNNNNNNNN
GHz
,3 0
NNNNN
)
s
)
T roubleshooting 4-31
Page 93
Troubleshooting the A3 SYTFMD
Figure 4-4. T est Connector Construction
4. Connect channel B o f the oscilloscope to A10TP1-5. Remove the discriminator output cable ,
W8, from A10J4 and connect it to one side of the test connector
to connect the other side of the test connector to channel A o n the oscilloscope
5. The amplitude of the oscilloscope trace should be greater than 0.2 V peak to peak. See
Figure 4-5 for illustrations of possible waveforms . I f there are any problems with the
amplitude of the discriminator output, perform A djustment 08. Multiplier P ower Leveling.
If the module passes the procedure , but there is still a problem with the waveform, tune to
the oending frequency and verify that the power out of the A2 LO multiplier is greater
than or equal to +12.5 dBm with a power meter
If the power out of the A2 meets or exceeds +12.5 dBm, replace the A3 SYTFMD for low
discriminator output.
. I f i t i s not, replace the A2 LO multiplier .
. Use an SMB to BNC cable
.
4-32 T roubleshooting
Page 94
Troubleshooting the A3 SYTFMD
Figure 4-5. Discriminator Output W aveform
T roubleshooting 4-33
Page 95
Troubleshooting the A4 Input Attenuator
The A4 input attenuator is a four-section attenuator with one 10 dB and three 20 dB sections .
The switching drive comes from the A12 controller . Refer to function block E o f the
A12 controller schematic .
Each attenuator section is controlled by two lines .F or example , when 40 dB of attenuation is
used, attenuator sections two and four will be enabled. T o switch in section two , control line
SECT 2-20 will be +0.5 V and control line SECT 2-0 will be +25 V . The control line voltages
will be reversed on sections that are not enabled. With 40 dB of attenuation, SECT 1-10 will
measure +25 V and SECT 1-0 will measure 0.5 V .
1. If the switching logic is correct, but the signal attenuation is not, replace the
A4 input attenuator .
2. If the switching logic is incorrect, replace the A12 controller .
4-34 T roubleshooting
Page 96
Troubleshooting and Alignment of the A5, A7, A8, A9
Troubleshooting and Alignment of the A5, A7, A8, A9
The ve parts that make up the 2nd converter are the A5 V CO sampler , A 7 2nd mixer ,
A8 321.4 MHz matching network , A 9 2nd converter PLL , and 3.6 GHz cavity bandpass lter
and oscillator .
The A5 V CO sampler provides two functions: (1) varactor tuning for the 3.3 GHz local
oscillator , and (2) sampler-phase detector for the 3.3 GHz oscillator .
The A8 321.4 MHz matching network provides the necessary loads to the output of the 2nd
converter and the input of A11 last converter .
The A9 2nd converter PLL provides two functions: (1) 300 MHz amplication for use as the
sampling signal, and (2) 3.3 GHz oscillator frequency correction voltage .
Refer to the A djustment 22. 2nd Converter Bandpass Filter Tune for additional help .
CA UTION
Note
V CO A djust
1. Turn on mainframe power .
2. Turn A9R6 (sampler oset adjustment) fully CW (clockwise).
3. A djust A9R7 (tuning range adjustment) for 0 5.0 V a t A5J4-1 (V CO tune line).
4. Connect the HP 8566B spectrum analyzer RF INPUT to A8 321.4 IF OUT
5. A djust LO ADJ (V CO cavity tuning screw) for an IF output frequency of 3300 MHz
6. If the oscillator will not adjust for an output frequency of 3300 MHz, perform the following
steps .
Measure the V CO bias voltages at J4-2 and J4-3. They should be +10.4 V and
respectively . I f J4-2 measures +12 V o r i f J4-3 measures
between the spring clips on the A5 and feedthroughs on the V
5086-1626).
P ositioning of the bandpass lter relative to the antenna-probe screw can be critical.
Typically , the casting should be as far as possible from the wall of the centerbody casting.
T o re-position the lter , loosen all screws in the bandpass casting. While holding the
casting down and away from the top of the module , tighten all screws in a criss-cross
pattern.
P ositioning of the V CO/sampler board is also critical. T o reposition, loosen the SMA
connector nut and the two grounding screws . Typically the board is positioned toward the
left corner and rotated CCW .
V erify that none of the bandpass lter tuning screws are screwed all the way in.
7. Connect the power meter to the 2nd LO auxiliary output SMA connector on the V CO cavity .
Set the output power to 0 7.75 dBm by turning the SMA connector in or out of the cavity
housing. (This power level directly aects the SAMPLER A C I F OUTPUT .)
The A5 V CO sampler , A 7 2nd mixer , A 8 321.4 MHz matching network , and
A9 2nd converter PLL are extremely static-sensitive . Before proceeding, refer
to \Preparing a Static-Safe W ork Station ".
If the cover of the 2nd converter is removed to make an adjustment, replace
it with an HP 5022-1150 2nd converter test cover during testing to assure
consistent ground connection and proper converter alignment.
.
6
1 MHz.
0
2.7 V ,
0
12 V , there may be no contact
CO feedthrough cover (HP
This power level should be close to correct with two threads showing on the aux out
coupling connector . I f not, the failure is most likely a faulty oscillator transistor (TC131) or
incorrect supply voltages at the oscillator circuit.
8. Tighten the SMA connector locknut; then tighten the set screw
.
T roubleshooting 4-35
Page 97
Troubleshooting and Alignment of the A5, A7, A8, A9
Sampler DC IF Output
1. Connect the semi-rigid cable between the 2nd LO A UX OUT and the SAMPLER input.
2. Connect the synthesizer RF output (300 MHz , 0 dBm ) t o the 300 MHz reference input on the
DUT rear panel.
3. Connect the DVM between TP-2 and J4-4 to measure the sampler IF OUTPUT . The voltage
should be no greater than 6 50 mVdc with the cable connected from the aux out.
4. Disconnect the DVM.
Sampler A C I F Output
1. Connect the semi-rigid cable between the 2nd LO A UX OUT and the SAMPLER input.
2. Connect the oscilloscope (or DVM) between J4-4 and ground.
3. P eak the response on the oscilloscope by tuning the synthesizer from 299.9 MHz to
300.1 MHz . The A C I F OUTPUT should be 196 mV peak to peak. Check the power level at
the 300 MHz A ux port (+2 to 8 dBm ) and at the SRD driver amp (15 dBm ). If these power
levels are correct, the failure is most likely either a defective sampler or feedthrough J4-4.
Search Oscillator A djust
1. Connect the oscilloscope between A9TP1 and ground.
2. Set the reference frequency to 302 MHz.
3. A djust R6 (sampler oset pot) for a 50% duty-cycle square wave at A9TP1. The square wave
0
should switch between greater than +9.5 V and less than
4. Set the reference frequency to 298 MHz and check the duty cycle of the A9TP1 waveform.
If the duty cycle is not 50%, repeat steps 2 through 4. If the search oscillator is not
working, the failure is most likely A9U1 (phase-lock-loop amplier).
9.5 volts .
Search Oscillator P eak
1. Connect the oscilloscope between A9J4-1 and ground.
0
2. A djust R7 (tune range pot) for a square wave peak between 0 and
Phase Lock
1. Set the reference frequency to 300 MHz , and then verify 2nd LO phase lock.
2. V erify a stable 0 4t o 0 5 V at J4-1.
V CO Tuning Range Preliminary
1. Connect the DVM between A9TP1 and ground.
2. Set the reference frequency to 300.6 MHz.
3. A djust the V CO cavity adjustment screw (usually CCW) until the 2nd LO phase
locks . The following are phase lock indicators: the green 2nd LO LOCKED LED on
A10 power supply/driver , a stable negative voltage (approximately 0 10 to 0 8 V ) a t A2TP1, a
stable oscillator signal as viewed on the spectrum analyzer .
4. Set the reference frequency to 299.35 MHz.
5. A djust R7 (usually CW) for 2nd LO phase lock. The DVM will indicate a positive voltage (6
to 9 V).
6. Repeat steps 2 through 5 until the 2nd LO remains locked at both reference frequencies
without further adjustment of R7.
Mixer Bias Check
1. Connect the DVM between A8TP1 and ground.
2. The mixer bias should be in the range of +0.6 to +1.3 V . I f mixer bias is higher than +1.3 V ,
check the value of the 100 ohm resistor on A8. If the bias is lower than +.6 V , the failure is
most likely a bad mixer or poor 2nd LO coupling to the mixer
the mixer diode is backwards , but this will not aect operation.
. I f the bias is 0 0.6 to 0 1.3 V ,
2 Vdc .
4-36 T roubleshooting
Page 98
Troubleshooting and Alignment of the A5, A7, A8, A9
Bandpass Filter A djustment
1. The program provided for 2nd converter BPF alignment requires an HP 8756A scalar
network analyzer or HP 8757A scalar network analyzer . Run the program found under the
adjustment tests menu for 2nd BPF alignment.
2. In wide span (100 MHz) the bandpass lter center frequency will be to the right of center
screen on the network analyzer .
3. Turn A8L1 all the way out.
4. Tune IF ADJ 3 for a peak at center frequency .
5. Tune IF ADJ 2 for a dip at center frequency .P eaks on either side of the dip should be
nearly the same amplitude .
6. Tune IF ADJ 1 for a peak and an overall well-shaped bandpass .
7. A djust A8L1 for overall bandpass atness and symmetry .
8. If the 3 d B bandwidth limits and atness cannot be met, adjust the input coupling connector
for more or less coupling. This will necessitate readjustment of IF ADJ 1, 2, and 3.
V CO Tuning Range Final
Repeat the adjustment steps found under A djustment 19. V CO Tune Range Preliminary Check.
2nd Converter Conversion Loss and Noise Figure
Run A djustment 26. Noise Figure 2nd Converter .
T roubleshooting 4-37
Page 99
Troubleshooting the A10 P ower Supply/Driver
The A10 power supply/driver contains the power supplies and driver circuits for the various
assemblies of the module . Troubleshooting procedures are provided for both circuits . Circuit
descriptions for the driver circuit are also provided.
P ower Supply Troubleshooting
The following power supplies are provided by A10 power supply/driver :
+4 V (unregulated)
+5 V
+8 V
+8 V (unregulated)
+11 V (unregulated)
+12 V
+25 V
+35 V (unregulated)
0
12 V
T o troubleshoot power supply problems , turn o the power on the HP 70000 Series modular
measurement system, remove the rear panel LO INPUT cable
to the following A10 power supply/driver jacks:
Jack Provides P ower T o
, and remove the cables attached
A10J201
A10J201
A10J201
A10J201
A10J203
A10J301
A10J301
A10J301
If the fuse is blown, replace it. Turn on the power of the HP 70000 Series modular
measurement system. If the supply voltages are incorrect or if the fuse still blows , the problem
is on the A10 power supply/driver . I f these problems do not occur , turn o the power of
the HP 70000 Series modular measurement system, replace one cable , and then turn the
power back on. Continue to replace one cable at a time until the problem shows , and then
troubleshoot the faulty assembly serviced by the cable .
Driver Circuit Descriptions
In the following descriptions , the term block refers to the function blocks on the
A10 power supply/driver schematic diagram.
BLOCK C
This is 1.5 V/GHz of LO output frequency . This signal is used as a reference for the
frequency-dependent break points , frequency-dependent lter drives , and frequency-dependent
loop gain.
:: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::
: : : ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: ::
:: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :
::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :
: : : ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: ::
: : : : : : : ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: :::
:: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :
: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: ::
receives the Tune + Span signal from the HP 70900A/B local oscillator source .
A9 2nd converter PLL
A11 last converter
A12 controller
A14 front panel board
A3 SYTFMD
A1 leveling amplier
A2 LO multiplier
A13 ALC/bias
BLOCKS D and E
proportional to the center frequency of the A3 SYTFMD . The proportional relationship varies
with the band setting.
BLOCK L
tuning in the A3 SYTFMD .
4-38 T roubleshooting
provides frequency-dependent linearity compensation for approximating linear YTF
attenuate the Tune + Span signal so the output of A10U2 is a voltage ramp
Page 100
Troubleshooting the A10 P ower Supply/Driver
BLOCK G
(1) hysteresis from block F and the discriminator , (2) linearity breakpoint information from
block L, and (3) dc oset information from block M.
BLOCK F
The faster the rate of change the deeper into saturation U5A and U5B go , causing the duty
cycle of the output pulse to change . U6C and U6D change the gain of U5A depending on which
frequency band the A3 SYTFMD is tuned to .
BLOCK M
YTF to track 321.4 MHz below the LO input frequency .
BLOCK R
correction from block L and a slope correction to provide linearization of the oset coil
response . This is added to a d c oset proportional to 321.4 MHz (the dierence in frequency
between the LO input of the A3 SYTFMD and YTF).
BLOCK S
A3 SYTFMD .
BLOCKS K and N
closed-loop gain.
BLOCK V
information and changing its heater current.
BLOCKS O and A
discriminator loop is unlocked.
sums the output of block D with correction information from the following sources:
responds only to the fast change in voltage of the Tune + Span signal during retrace .
provides a d c oset proportional to 321.4 MHz to the A3 SYTFMD . This causes the
provides an oset-coil summing node which adds together a squared oset error
uses the signal from block R t o drive current in the discriminator oset coil of the
buer the output from the A3 SYTFMD and provide frequency-dependent
controls the A3 SYTFMD temperature by reacting to temperature-sensing
shorten lock-acquisition time . The search oscillator is enabled when the
BLOCK P
the YTF main coil to force a 321.4 MHz frequency dierence between the LO input of the
A3 SYTFMD and YTF .
BLOCKS A, I, and X
Circuit Conditions Reported
A1 LO Leveling Amplier
A2 LO Multiplier
Discriminator Lock Loop
Tune + Span Signal
BLOCK T
local oscillator source frequencies from 3 t o 4.0 GHz.
BLOCK U
to reference the lter drive . The lter reduces in-band harmonics when the HP 70900A/B local
oscillator source is tuned between 3 t o 3.3 GHz
Driver Troubleshooting
The following seven procedures are provided for troubleshooting driver circuits:
Main Coil Drive
Loop Gain versus Frequency
Hysteresis and Delay
Linearity Compensation
A1 LOLA Filter Drive
Multiplier V oltage-Tuned Filter Drive
Interface Block
integrates the discriminator frequency-error information. The output is applied to
provide the A12 controller with the following status information:
: : : : : ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :
:: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: ::
: : : : : ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: :
: : : ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: ::
drives the lter switch of the A2 LO multiplier . The lter is on for HP 70900A/B
drives the lter of the A1 leveling amplier . The circuit uses the Tune + Span signal
.
leveled/unleveled
leveled/unleveled
locked/unlocked
present/not present
T roubleshooting 4-39