Agilent 70900B Service Manual

Service Guide

HP 70900B

Local Oscillator Source

ABCDE

HP Part No. 70900-90293

Printed in USA June 1995

Edition A.0.0

Notice

The information contained in this document is subject to change without notice.

Hewlett-Packard makes no warranty of any kind with regard to this material, including,

but not limited to, the implied warranties of merchantability and tness for a particular

purpose. Hewlett-Packard shall not be liable for errors contained herein or for incidental or

consequential damages in connection with the furnishing, performance, or use of this material.

Restricted Rights Legend.

Use, duplication, or disclosure by the U.S. Government is subject to restrictions as set forth

in subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer Software clause at

DFARS 252.227-7013 for DOD agencies, and subparagraphs (c) (1) and (c) (2) of the Commercial

Computer Software Restricted Rights clause at FAR 52.227-19 for other agencies.

c



Copyright Hewlett-Packard Company 1989, 1990, 1995

All Rights Reserved. Reproduction, adaptation, or translation without prior written permission

is prohibited, except as allowed under the copyright laws

1400 Fountaingrove Parkway, Santa Rosa, CA 95403-1799, USA

.

Certication

Hewlett-Packard Company certies that this product met its published specications at the

time of shipment from the factory. Hewlett-Packard further certies that its calibration

measurements are traceable to the United States National Institute of Standards and

Technology, to the extent allowed by the Institute's calibration facility, and to the calibration

facilities of other International Standards Organization members.

Warranty

This Hewlett-Packard instrument product is warranted against defects in material and

workmanship for a period of one year from date of shipment. During the warranty period,

Hewlett-Packard Company will, at its option, either repair or replace products which prove to

be defective.

For warranty service or repair, this product must be returned to a service facility designated by

Hewlett-Packard. Buyer shall prepay shipping charges to Hewlett-Packard and Hewlett-Packard

shall pay shipping charges to return the product to Buyer. However, Buyer shall pay all

shipping charges, duties, and taxes for products returned to Hewlett-Packard from another

country.

Hewlett-Packard warrants that its software and rmware designated by Hewlett-P

ackard for

use with an instrument will execute its programming instructions when properly installed on

that instrument. Hewlett-Packard does not warrant that the operation of the instrument, or

software, or rmware will be uninterrupted or error-free.

Limitation of Warranty

The foregoing warranty shall not apply to defects resulting from improper or inadequate

maintenance by Buyer, Buyer-supplied software or interfacing, unauthorized modication or

misuse, operation outside of the environmental specications for the product, or improper

site preparation or maintenance.

NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. HEWLETT-PACKARD SPECIFICALLY

DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A

PARTICULAR PURPOSE.

Exclusive Remedies

THE REMEDIES PROVIDED HEREIN ARE BUYER'S SOLE AND EXCLUSIVE REMEDIES.

HEWLETT-PACKARD SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL,

INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT, TORT,

OR ANY OTHER LEGAL THEORY.

Assistance

Product maintenance agreements and other customer assistance agreements are available for

Hewlett-Packard products.

For any assistance, contact your nearest Hewlett-Packard Sales and Service Oce.

iii

Safety Symbols

The following safety symbols are used throughout this manual. Familiarize yourself with each

of the symbols and its meaning before operating this instrument.

The

CAUTION

WARNING

DANGER

CAUTION

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

WARNING

which, if not correctly performed or adhered to, could result in injury

to the user. Do not proceed beyond a

conditions are fully understood and met.

The

DANGER

reader of a procedure which, if not correctly performed or adhered to,

could result in injury or loss of life. Do not proceed beyond a

sign until the indicated conditions are fully understood and met.

sign denotes a hazard. It calls attention to a procedure which, if

CAUTION

sign denotes a hazard. It calls attention to a procedure

WARNING

sign denotes an imminent hazard to people. It warns the

sign until the indicated

sign

DANGER

iv

General Safety Considerations

WARNING

WARNING

The instructions in this document are for use by qualied personnel

only.To avoid electrical shock, do not perform any servicing unless you

are qualied to do so.

The opening of covers or removal of parts is likely to expose dangerous

voltages. Disconnect the instrument from all voltage sources while it is

being opened.

The power cord is connected to internal capacitors that may remain live

for ve seconds after disconnecting the plug from its power supply.

This is a Safety Class 1 Product (provided with a protective earthing

ground incorporated in the power cord). The mains plug shall only be

inserted in a socket outlet provided with a protective earth contact.

Any interruption of the protective conductor inside or outside of the

instrument is likely to make the instrument dangerous. Intentional

interruption is prohibited.

For continued protection against re hazard, replace fuse only with

same type and ratings, (type nA/nV). The use of other fuses or materials

is prohibited.

Before this instrument is switched on, make sure it has been properly

grounded through the protective conductor of the ac power cable to a

socket outlet provided with protective earth contact.

Any interruption of the protective (grounding) conductor, inside

or outside the instrument, or disconnection of the protective earth

terminal can result in personal injury.

Before this instrument is switched on, make sure its primary power

circuitry has been adapted to the voltage of the ac power source

.

Failure to set the ac power input to the correct voltage could cause

damage to the instrument when the ac power cable is plugged in.

v

Servicing at a Glance

vi

The local oscillator source is a module that is used in HP 70000 Series modular measurement

systems. A standard modular spectrum analyzer system includes a mainframe with an

RF section, IF section, local oscillator, an optional display, and an optional precision frequency

reference.

Software and documentation supplied

which includes:

HP 70900B Service Guide

HP 70900B Component Level Information Packages

Module verication software disks.

Tools needed

may be needed during servicing.

Antistatic precautions

electricity. If possible, work at a static-safe work station. For further information, refer to

\Preparing a Static-Safe Work Station" in Chapter 4.

Before servicing, refer to Chapter 5 for a list of the tools and accessories that

Electrical components are easily damaged by small amounts of static

This service guide is part of an Option OB3 package

vii

In This Book

This book describes all of the service procedures necessary to test, adjust, calibrate,

troubleshoot, and repair your local oscillator source in an HP 70000 Series modular

measurement system.

Each module in the HP 70000 Series modular measurement system has its own service guide.

For further information related to the servicing of additional and alternate modules that can be

used in this system, refer to that module's service guide.

This service guide is part of an Option OB3 package which consists of two manuals.

Manual 1

Chapter 1 provides information to help get you started so that your local oscillator source is

serviced properly.

Chapter 2 contains information needed to use module verication software while servicing

your local oscillator source.

Chapter 3 contains information to help identify and resolve some common problems that may

occur with your local oscillator source before extensive servicing.

Chapter 4 contains information about troubleshooting your local oscillator source . It

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

.

Chapter 5 contains tables with a complete listing of all equipment that may be required for

servicing.

Chapter 6 contains the setups for all adjustment procedures that are used to optimize module

performance when assemblies are changed, repaired, or adjusted.

Chapter 7 contains the setups for all module verication tests that are used to optimize

module performance when assemblies are changed, repaired, or adjusted.

Chapter 8 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 9 contains procedures for removal and replacement of major assemblies in your

local oscillator source. It also contains information needed to order mechanical parts for your

local oscillator source.

Chapter 10 contains information on all overall parts identication drawings that should be

used when performing the troubleshooting procedures descibed in this service guide.

An index is also added at the end of this service guide to aid the user in nding key items of

interest.

Manual 2

Manual 2 contains packets of component-level repair information for each

local oscillator source board assembly that has eld-replaceable parts. Each packet includes

the parts list, component-location drawing, and schematics for a specic board-assembly part

number. This manual also contains a table that can be used to cross reference dierent board

assemblies that have dierent serial prex breaks.

Before you begin servicing

information on how to use this module verication software

, you must become familiar with module verication software.For

, refer to Chapter 2.

viii

Contents

1. Getting Started

What Is Servicing? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

When Is Servicing Needed? . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

If You Want Hewlett-Packard to Service Your Local Oscillator Source ...... 1-3

Determining Your Local Oscillator Source's Serial Number ...... .... 1-3

Returning Your Local Oscillator Source for Service . . . . . . . . . . . . . . 1-5

2. Module Verication Software

Computer Compatibility ........................... 2-2

Alternate Key Labels ...... ...... ...... ...... ... 2-2

Computer Language Compatibility .....................

Printer Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Conguring the Hardware .......... ...... ...... ....

Installing Module Verication Software ....................

Module Verication Software Overview . . . . . . . . . . . . . . . . . . . .

Testing Multiple Modules . . . . . . . . . . . . . . . . . . . . . . . . . .

Error Messages or Warnings Dened .. ...... ...... ..... .

Final Tests Dened . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Single Tests Dened ...... ...... ...... ..... .....

Printing Test 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

Parameter Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Parameter Menu Edit Screen . . . . . . . . . . . . . . . . . . . . . . .

Parameter 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 Address Menu .......................... 2-16

Test Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

Test 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

3. Before Extensive Servicing

If the System's Power-On Self Test Fails . . . . . . . . . . . . . . . . . . . . 3-2

If Your HP 70900B Local Oscillator Source Is Powered On But Not Responding

Correctly ................................ 3-4

If the STATUS ERR Indicator LED on the HP 70900B Local Oscillator Source is

Flashing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

If More Than One Module's Error Indicator Is Flashing . . . . . . . . . . . . . 3-6

4. Troubleshooting

Preparing a Static-Safe Work Station ...... ...... ...... ... 4-2

Troubleshooting Flow Chart ......................... 4-4

If Operating Errors Messages (2000{2999) Occur . . . . . . . . . . . . . . . . 4-7

If Hardware Error Messages (7000{7999) Occur ...... ...... .... 4-8

If Series 8000 Error Messages (8000{8999) Occur . . . . . . . . . . . . . . . . 4-18

If Series 9000 Error Messages (9000{9999) Occur . . . . . . . . . . . . . . . . 4-19

A1A1 Host/Processor and A1A2 1/4 MB RAM/ROM Troubleshooting . . . . . . . 4-20

A3 Power Supply Troubleshooting ...................... 4-23

A4 Idler Phase-Lock Loop Troubleshooting .................. 4-25

A6 YTO Phase-Lock Loop/A8 Frequency Control Troubleshooting . . . . . . . . 4-31

A7 FRAC'N Synthesizer Troubleshooting ................... 4-37

If You Have Verication Test Failures .....................

If You Have Adjustment Procedure Failures .. .... ...... ......

Performing Related Adjustments and Verication Tests . . . . . . . . . . . . .

The State Worksheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Overall Block Diagram of Local Oscillator Source ...............

4-40

4-47

4-53

4-57

4-59

5. Recommended Test Equipment Tables

300 MHz Up-Converter Construction Procedure .. ...... ...... ..

Snier Loop Construction Procedure .......... ...... .....

Resistive Divider Construction Procedure ...... ...... ...... .

6. Adjustment Procedures

Before You Begin ..............................

Types of Adjustments ...... ...... ...... ..... .....

Adjustment 01. Video Processor .... ...... ...... ...... .

Adjustment 02. 100 MHz Reference/300 MHz Bandpass Filter . . . . . . . . . . 6-11

Adjustment 03. 300 MHz Bandpass Filter .. ...... ...... ..... 6-15

Adjustment 04. Calibrator Output Frequency ................. 6-18

Adjustment 05. Calibrator Output Amplitude .. ...... ..... .... 6-19

Adjustment 06. 300 MHz Reference Output Amplitude . . . . . . . . . . . . . 6-20

Adjustment 07. FFS VCO...........................

Adjustment 08. FFS Tune/Comp Coarse . . . . . . . . . . . . . . . . . . . .

Adjustment 09. FFS Reference Null . . . . . . . . . . . . . . . . . . . . . .

Adjustment 10. FFS API 1 ..........................

Adjustment 11. FFS API 2 ..........................

Adjustment 12. FFS API 3 ..........................

Adjustment 13. FFS Tune/Comp Fine . . . . . . . . . . . . . . . . . . . . .

Adjustment 14. FFS Spurious Responses ...................

Adjustment 15. Low Idler .......................... 6-36

Adjustment 16. Sweep Oset . . . . . . . . . . . . . . . . . . . . . . . . . 6-38

Adjustment 17. Frequency Control Voltage References . . . . . . . . . . . . .

Adjustment 18. YTO Frequency Endpoints .... ...... ...... ..

Adjustment 19. FM Gain . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjustment 20. Sweep Overshoot . . . . . . . . . . . . . . . . . . . . . . .

Adjustment 21. Tune + Span Oset .....................

5-4

5-9

5-10

6-2

6-6

6-8

6-22

6-24

6-26

6-28

6-30

6-31

6-32

6-34

6-40

6-42

6-45

6-47

6-49

Contents-2

Adjustment 22. Idler Buer ......................... 6-51

7. Module Verication Tests

Verication Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . 7-3

Test 01. 300 MHz Reference Output Power and Harmonics . . . . . . . . . . . 7-4

Test 02. LO Output Power and Harmonics . . . . . . . . . . . . . . . . . . . 7-5

Test 03. Residual FM (Span>10 MHz) . . . . . . . . . . . . . . . . . . . . . 7-6

Test 04. LO Output Spurious Response .................... 7-7

Test 05. LO Display Sidebands ........................ 7-9

Test 06. LO 40 kHz Sidebands .... ...... ...... ...... .. 7-11

Test 07. Reference Oscillator Accuracy .................... 7-13

Test 08. Calibrator Amplitude Accuracy . . . . . . . . . . . . . . . . . . . . 7-15

Test 09. 300 MHz Reference Amplitude Accuracy .......... ..... 7-16

Test 10. Video Detector Tracking . . . . . . . . . . . . . . . . . . . . . . . 7-17

Test 11. External Triggering ......................... 7-18

Test 12. Video Processor Noise . . . . . . . . . . . . . . . . . . . . . . . . 7-19

Test 13. LO Frequency and Span Accuracy (Span>10 MHz) .......... 7-20

Test 14. LO Span Accuracy (Phase-Locked Spans) ............... 7-21

Test 15. LO Frequency Accuracy (Span10 MHz) ............... 7-22

Test 16. LO Frequency Error versus Sweep Time ...............

Test 17. Tune + Span Output Accuracy ...................

Test 18. SWP Output Accuracy . . . . . . . . . . . . . . . . . . . . . . . .

Test 19. HSWP Output Voltage ........................

Test 20. Line Triggering ...........................

Test 21. LED Check .............................

Test 22. Video Bandwidth ..........................

Test 23. 300 MHz Reference 40 kHz Sidebands . . . . . . . . . . . . . . . . .

Test 24. Calibrator Harmonics ........................

Test 25. Calibrator Output Impedance . . . . . . . . . . . . . . . . . . . . .

Test 26. 300 MHz Reference Isolation . . . . . . . . . . . . . . . . . . . . .

Test 27. External Reference .........................

Test 28. Reference Oscillator Noise and Stability . . . . . . . . . . . . . . . .

Test 29. YTO Linearity . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7-23

7-24

7-25

7-26

7-27

7-29

7-30

7-31

7-33

7-34

7-36

7-38

7-40

7-41

8. System Calibration

External Frequency Reference ........................ 8-2

Spectrum Analyzer/RF Cable Calibration .. ...... ...... ..... 8-6

9. Replacing Major Assemblies

A1A1 Host/Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A1A2 1/4 MB RAM/ROM ...........................

A2 Video Processor .............................

A3 Power Supply ...... ...... ...... ..... ...... .

A4 Idler Phase-Lock Loop ...... ...... ...... ...... ..

A4A1 300 MHz Amplier . . . . . . . . . . . . . . . . . . . . . . . . . . .

A4A2 Idler Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A6 YTO Phase-Lock Loop ..........................

A6A1 100 MHz Reference ...... ...... ...... ..... ... 9-18

A6A2 YTO Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-20

A6A3 Idler Buer ..............................

A6A4 YTO Lock Microcircuit . . . . . . . . . . . . . . . . . . . . . . . . .

A6A5 YTO .................................

A7 FRAC'N Synthesizer for Serial #3219A01388 and Above . . . . . . . . . . .

A7 FRAC'N Synthesizer for Serial #3144A01387 and Below . . . . . . . . . . .

9-3

9-5

9-6

9-7

9-9

9-11

9-13

9-15

9-22

9-23

9-25

9-27

9-31

Contents-3

A8 Frequency Control ............................ 9-37

A9 Front Panel ............................... 9-38

10. Overall Parts Identication Drawings

Front View Identication . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2

Rear View Identication ...... ...... ...... ...... ... 10-4

Top View Identication . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-6

Bottom View Identication . . . . . . . . . . . . . . . . . . . . . . . . . . 10-15

Side View Identication ........................... 10-16

Side View Identication (A4 Idler Phase-Lock Loop) . . . . . . . . . . . . . . 10-18

Side View Identication (A6 YTO Phase-Lock Loop) .... ...... .... 10-19

Side View Identication (A7 FRAC'N Synthesizer) ............... 10-21

Index

Contents-4

Figures

1-1. Typical Serial Number Label .. ...... ...... ...... .... 1-3

2-1. Main Menu Softkeys . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

2-2. Mass Storage Menu and Parameter Menu Softkeys . . . . . . . . . . . . . . 2-20

2-3. Equipment Menu and HP-MSIB Map Screen Menu Softkeys . . . . . . . . . . 2-21

2-4. Test Menu Softkeys ............................ 2-22

3-1. Line Voltage Selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

3-2. Line Fuse Removal and Replacement .................... 3-2

4-1. Static-Safe Work Station .. ...... ...... ...... ...... 4-2

4-2. Troubleshooting Flow Chart ........................ 4-4

4-3. Block Diagram of A7 FRAC'N Synthesizer for Serial #3144A01387 and Below . 4-59

4-4. Overall Block Diagram of Local Oscillator Source .... ...... .... 4-61

5-1. 300 MHz Up-Converter Block Diagram ...................

5-2. 300 MHz Up-Converter Assembly Diagram . . . . . . . . . . . . . . . . . .

5-3. Power Levels through RF Chain ...... ...... ...... ....

5-4. Snier Loop Assembly Diagram . . . . . . . . . . . . . . . . . . . . . . .

5-5. Resistive Divider Schematic Diagram ....................

5-6. Resistive Divider Assembly Diagram ....................

6-1. Equipment Setup for Adjustment 01. Video Processor ............

6-2. Locations for Adjustment 01. Video Processor . . . . . . . . . . . . . . . .

6-3. Equipment Setup for Adjustment 02. 100 MHz Reference/300 MHz Bandpass

Filter ...... ...... ...... ...... ...... ...

6-4. Locations for Adjustment 02. 100 MHz Reference/300 MHz Bandpass Filter .. 6-11

6-5. Placing A1A1 Host/Processor and A3 Power Supply on Extender Cables . . . .

6-6. Equipment Setup for Adjustment 03. 300 MHz Bandpass Filter . . . . . . . .

6-7. Locations for Adjustment 03. 300 MHz Bandpass Filter . . . . . . . . . . . .

6-8. Placing A1A1 Host/Processor and A2 Video Processor on Extender Cables . . .

6-9. Equipment Setup for Adjustment 04. Calibrator Output Frequency . . . . . . 6-18

6-10. Equipment Setup for Adjustment 05. Calibrator Output Amplitude . . . . . . 6-19

6-11. Equipment Setup for Adjustment 06. 300 MHz Reference Output Amplitude . 6-20

6-12. Locations for Adjustment 06. 300 MHz Reference Output Amplitude ..... 6-20

6-13. Equipment Setup for Adjustment 07. FFS VCO ............... 6-22

6-14. Locations for Adjustment 07. FFS VCO ...................

6-15. Equipment Setup for Adjustment 08. FFS Tune/Comp Coarse . . . . . . . . .

6-16. Locations for Adjustment 08. FFS Tune/Comp Coarse ............

6-17. Equipment Setup for Adjustment 09. FFS Reference Null .. ...... .. 6-26

6-18. Locations for Adjustment 09. FFS Reference Null .............. 6-26

6-19. Equipment Setup for Adjustment 10. FFS API 1 . . . . . . . . . . . . . . .

6-20. Locations for Adjustment 10. FFS API 1 (1 of 2) . . . . . . . . . . . . . . .

6-21. Locations for Adjustment 10. FFS API 1 (2 of 2) . . . . . . . . . . . . . . .

6-22. Equipment Setup for Adjustment 13. FFS Tune/Comp Fine . . . . . . . . . . 6-32

6-23. Equipment Setup for Adjustment 14. FFS Spurious Responses ........ 6-34

6-24. Equipment Setup for Adjustment 15. Low Idler ............... 6-36

6-25. Locations for Adjustment 15. Low Idler . . . . . . . . . . . . . . . . . . .

6-26. Equipment Setup for Adjustment 16. Sweep Oset ...... ...... .

6-27. Locations for Adjustment 16. Sweep Oset .................

6-28. Equipment Setup for Adjustment 17. Frequency Control Voltage References . 6-40

5-4

5-6

5-7

5-9

5-10

5-10

6-8

6-9

6-11

6-12

6-15

6-15

6-16

6-22

6-24

6-24

6-28

6-28

6-29

6-36

6-38

6-38

Contents-5

6-29. Locations for Adjustment 17. Frequency Control Voltage References ..... 6-40

6-30. Equipment Setup for Adjustment 18. YTO Frequency Endpoints ....... 6-42

6-31. Locations for Adjustment 18. YTO Frequency Endpoints (1 of 2) ....... 6-42

6-32. Locations for Adjustment 18. YTO Frequency Endpoints (2 of 2) ....... 6-43

6-33. Equipment Setup for Adjustment 19. FM Gain . . . . . . . . . . . . . . . . 6-45

6-34. Locations for Adjustment 19. FM Gain ................... 6-45

6-35. Equipment Setup for Adjustment 20. Sweep Overshoot ........... 6-47

6-36. Locations for Adjustment 20. Sweep Overshoot .... ...... ..... 6-47

6-37. Equipment Setup for Adjustment 21. Tune + Span Oset .......... 6-49

6-38. Locations for Adjustment 21. Tune + Span Oset . . . . . . . . . . . . . . 6-49

6-39. Equipment Setup for Adjustment 22. Idler Buer .............. 6-51

6-40. Locations for Adjustment 22. Idler Buer . . . . . . . . . . . . . . . . . . 6-52

7-1. System Rear-Panel Connections . . . . . . . . . . . . . . . . . . . . . . . 7-3

7-2. 300 MHz Reference Output Power and Harmonics Test Setup . . . . . . . . . 7-4

7-3. LO Output Power and Harmonics Test Setup . . . . . . . . . . . . . . . . . 7-5

7-4. Residual FM (Span>10 MHz) Test Setup . . . . . . . . . . . . . . . . . . . 7-6

7-5. LO Output Spurious Response Test Setup .................. 7-7

7-6. LO Display Sidebands Test Setup ...................... 7-9

7-7. LO 40 kHz Sidebands Test Setup .. ...... ...... ...... .. 7-11

7-8. Reference Oscillator Accuracy Test Setup .................. 7-13

7-9. Calibrator Amplitude Accuracy Test Setup . . . . . . . . . . . . . . . . . .

7-10. 300 MHz Reference Amplitude Accuracy Test Setup .............

7-11. Video Detector Tracking Test Setup . . . . . . . . . . . . . . . . . . . . .

7-12. External Triggering Test Setup .......................

7-13. Test Setup for Test 12. Video Processor Noise .... ...... ......

7-15

7-16

7-17

7-18

7-19

7-14. LO Frequency and Span Accuracy (Span>10 MHz) Test Setup ........ 7-20

7-15. LO Span Accuracy (Phase-Locked Spans) Test Setup .............

7-16. LO Frequency Accuracy (Span10 MHz) Test Setup .............

7-17. LO Frequency Error versus Sweep Time Test Setup ...... ..... ..

7-18. Tune + Span Output Accuracy Test Setup . . . . . . . . . . . . . . . . . .

7-19. SWP Output Accuracy Test Setup . . . . . . . . . . . . . . . . . . . . . .

7-20. HSWP Output Voltage Test Setup ......................

7-21. Line Triggering Test Setup .........................

7-22. Test Setup for Test 21. LED Check ........ ...... ...... .

7-23. Video Bandwidth Test Setup ........................

7-21

7-22

7-23

7-24

7-25

7-26

7-27

7-29

7-30

7-24. 300 MHz Reference 40 kHz Sidebands Test Setup .............. 7-31

7-25. Calibrator Harmonics Test Setup ...................... 7-33

7-26. Calibrator Output Impedance Test Setup . . . . . . . . . . . . . . . . . . . 7-34

7-27. 300 MHz Reference Isolation Test Setup . . . . . . . . . . . . . . . . . . . 7-36

7-28. External Reference Test Setup .... ...... ...... ..... .. 7-38

7-29. Reference Oscillator Noise and Stability Test Setup . . . . . . . . . . . . . .

7-30. Test Setup for Test 29. YTO Linearity . . . . . . . . . . . . . . . . . . . .

8-1. Preferred Frequency Reference Connections ................

8-2. Using an HP 70310A Precision Frequency Reference . . . . . . . . . . . . .

7-40

7-41

8-3

8-4

8-3. Using an HP 70310A Precision Frequency Reference and a House Standard .. 8-4

8-4. Using an HP 8566B Spectrum Analyzer and a House Standard ........ 8-5

8-5. Reference Calibration Test Setup ......................

8-6. IF Calibration Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . .

8-6

8-6

8-7. RF Calibration Test Setup ......................... 8-7

9-1. A1A1 Host/Processor Removal/Replacement . . . . . . . . . . . . . . . . . 9-4

9-2. A2 Video Processor Removal/Replacement . . . . . . . . . . . . . . . . . .

9-3. A3 Power Supply Removal/Replacement . . . . . . . . . . . . . . . . . . .

9-4. A4 Idler Phase-Lock Loop Removal/Replacement ..............

9-5. A4A1 300 MHz Amplier Removal/Replacement . . . . . . . . . . . . . . .

9-6. A4A2 Idler Lock and A4A3 Idler V

CO Microcircuit Removal/Replacement ... 9-14

9-6

9-8

9-10

9-12

Contents-6

9-7. A6 YTO Phase-Lock Loop Removal/Replacement (1 of 2) . . . . . . . . . . . 9-16

9-7. A6 YTO Phase-Lock Loop Removal/Replacement (2 of 2) . . . . . . . . . . . 9-17

9-8. A6A1 100 MHz Reference Removal/Replacement . . . . . . . . . . . . . . . 9-19

9-9. A6A2 YTO Lock Removal/Replacement .. ...... ...... ..... 9-21

9-10. A6A3 Idler Buer Removal/Replacement .................. 9-22

9-11. A6A4 YTO Lock Microcircuit Removal/Replacement ........ ..... 9-24

9-12. A6A5 YTO Removal/Replacement . . . . . . . . . . . . . . . . . . . . . . 9-26

9-13. A7 FRAC'N Synthesizer Removal/Replacement for Serial #3219A01388 and

Above . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-28

9-14. A7A1 FFS Phase Lock Loop Removal/Replacement for Serial #3219A01388 and

Above . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-30

9-15. A7 FRAC'N Synthesizer Removal/Replacement for Serial #3144A01387 and

Below . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-32

9-16. A7A1 FFS Phase Lock Loop Removal/Replacement for Serial #3144A01387 and

Below . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-34

9-17. A7A2 FFS Analog Removal/Replacement for Serial #3144A01387 and Below . . 9-36

9-18. A8 Frequency Control Removal/Replacement ................ 9-37

9-19. A9 Front Panel Removal/Replacement . . . . . . . . . . . . . . . . . . . . 9-38

10-1. Overall Parts Identication Drawing, Front View (A9 Front Panel) ...... 10-2

10-2. Overall Parts Identication Drawing, Front View .............. 10-3

10-3. Overall Parts Identication Drawing, Front View (Panel Removed) ...... 10-3

10-4. Overall Parts Identication Drawing, Rear View (Rear-Frame) ........ 10-4

10-5. Overall Parts Identication Drawing, Rear Panel Connectors .........

10-6. Overall Parts Identication Drawing, Top View ...............

10-5

10-6

10-7. Overall Parts Identication Drawing, Top View (Assembly Locations) ..... 10-8

10-8. Overall Parts Identication Drawing, Top View (Cable Locations) ....... 10-10

10-9. Overall Parts Identication Drawing, Top View (Connector Locations) . . . . .

10-10. Overall Parts Identication Drawing, Bottom View . . . . . . . . . . . . . .

10-11. Overall Parts Identication Drawing, Side View ...............

10-12. Overall Parts Identication Drawing, Left-Side View . . . . . . . . . . . . .

10-13. Overall Parts Identication Drawing, Side View (A4 Idler Phase-Lock Loop) . .

10-7. Overall Parts Identication Drawing, Side View (A6 YTO Phase-Lock Loop)

10-14

10-15

10-16

10-17

10-18

.. 10-20

10-8. Overall Parts Identication Drawing, Side View (A7 FRAC'N Synthesizer) . . . 10-21

Contents-7

Tables

1-1. Hewlett-Packard Sales and Service Oces . . . . . . . . . . . . . . . . . . 1-4

1-2. Packaging for a 2/8 Module . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

3-1. Default HP-MSIB Address Map ....................... 3-3

4-1. Static-Safe ESD Accessories ........................ 4-3

4-2. A3 Power Supply Measurements ........ ...... ...... .. 4-24

4-3. Measurements at A6A1 100 MHz Reference (J6) and (J7) Pin 4 ........ 4-37

4-4. State Worksheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-57

5-1. Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . 5-1

5-2. Components for the 300 MHz Up-Converter . . . . . . . . . . . . . . . . . 5-5

5-3. 300 MHz Up-Converter Parts List . . . . . . . . . . . . . . . . . . . . . . 5-6

5-4. Snier Loop Assembly Parts List ...................... 5-9

5-5. Resistive Divider Parts . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-1. Adjustable Components ...... ...... ..... ...... ...

6-2. Equipment Required for Adjustments . . . . . . . . . . . . . . . . . . . .

9-1. Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-11

6-4

6-5

9-2

Contents-8

1

Getting Started

This chapter provides information to help get you started so that your local oscillator source 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 local oscillator source to Hewlett-Packard for

servicing.

Getting Started 1-1

What Is Servicing?

Servicing includes testing, adjusting, calibrating, troubleshooting, and repairing.

There are dierent categories of testing available. These categories are module verication

tests, system verication of operation tests, and system performance tests.

Module

Verication Tests

Module verication tests are used to test modules so that when assembled

into a system, the system meets the system's specications. These sets of

tests are used during servicing.

System

Verication of

Operation Tests

System verication 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 specications. These sets of

tests are subsets of system performance tests.

System

Performance

System performance tests are used to verify the proper operation of a

complete modular measurement system (MMS) to full system specications.

Tests

This service guide provides information related to testing, adjusting, calibrating,

troubleshooting, and repairing your local oscillator source ; it also provides information on

module verication tests. These sets of tests are used during servicing.

For information related to system verication of operation tests

Spectrum Analyzer Installation and Verication Manual

, and for information related to

, refer to the

HP 70000 Modular

system performance tests, refer to the documentation for HP 11990A system performance test

software.

When Is Servicing Needed?

Servicing is needed:

if error messages are displayed on your HP 70000 Series display

if an ERROR LED or FAULT LED is on

to perform repairs or adjustments or both

to verify the correct operation of your local oscillator source

or, if applicable, when upgrading rmware

If you determine that your local oscillator source needs servicing, you can perform

the servicing yourself using the information in this manual or, you can return your

local oscillator source to a Hewlett-Packard service center.

1-2 Getting Started

If You Want Hewlett-Packard to Service Your

Local Oscillator Source

Before calling Hewlett-Packard or returning your local oscillator source for service, please read

your warranty information. Warranty information is printed at the front of this service guide.

In any correspondence or telephone conversations, refer to the local oscillator source by

its full model number and full serial number. With this information, the Hewlett-Packard

representative can determine whether your unit is still within its warranty period.

Determining Your Local Oscillator Source's Serial Number

When a module is manufactured by Hewlett-Packard, 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

prex and consists of four digits and a letter. The second part makes up the serial number

sux and consists of the last ve digits on the serial number label. The serial number prex is

the same for all identical modules; it only changes when a change in the electrical or physical

functionality is made. The serial number sux, however, changes sequentially and is dierent

for each module.

Figure 1-1. Typical Serial Number Label

Getting Started 1-3

Table 1-1. Hewlett-Packard Sales and Service Oces

US FIELD OPERATIONS EUROPEAN OPERATIONS INTERCON OPERATIONS

HEADQUARTERS HEADQUARTERS HEADQUARTERS

Hewlett-Packard Company Hewlett-Packard S.A. Hewlett-Packard Company

19320 Pruneridge Avenue 150, Route du Nant-d'Avril 3495 Deer Creek Rd.

Cupertino, CA 95014, USA 1217 Meyrin 2/Geneva Palo Alto, California 94304-1316

[phone] Switzerland [phone]

(41 22) 780.8111

California Australia

Hewlett-Packard Co.

France

Hewlett-Packard Australia Ltd.

1421 South Manhattan Ave. Hewlett-Packard France 31-41 Joseph Street (P.O. Box 221)

Fullerton, CA 92631 1Avenue Du Canada Blackburn, Victoria 3130

[phone] Zone D'Activite De Courtaboeuf (61 3) 895-2895

F-91947 Les Ulis Cedex

Hewlett-Packard Co. France

Canada

301 E. Evelyn (33 1) 69 82 60 60 Hewlett-Packard (Canada) Ltd.

Mountain View, CA 94041 17500 South Service Road

[phone]

Germany

Trans-Canada Highway

Hewlett-Packard GmbH Kirkland, Quebec H9J 2X8

Colorado

Hewlett-Packard-Strasse Canada

Hewlett-Packard Co. 61352 Bad Homburg [phone]

24 Inverness Place, East Germany

Englewood, CO 80112 ([phone]

[phone]

Georgia

Great Britain

Hewlett-Packard Ltd. 1-27-15 Yabe, Sagamihara

Japan

Yokogawa-Hewlett-Packard Ltd.

Hewlett-Packard Co. Eskdale Road, Winnersh Triangle Kanagawa 229, Japan

2000 South Park Place Wokingham, Berkshire RG11 5DZ (81 427) 59-1311

Atlanta, GA 30339 England

[phone] (44 734) 696622

China

Illinois

China Hewlett-Packard, Co.

Hewlett-Packard Co. 38 Bei San Huan X1 Road

5201 Tollview Drive Shuang Yu Shu

Rolling Meadows, IL 60008 Hai Dian District

[phone] Beijing, China

(86 1) 256-6888

New Jersey

Hewlett-Packard Co.

Singapore

150 Green Pond Road Hewlett-Packard Singapore

Rockaway, NJ 07866 Pte. Ltd.

[phone] Alexandra P.O. Box 87

Singapore 9115

Texas

(65) 271-9444

Hewlett-Packard Co.

930 E. Campbell Rd.

Taiwan

Richardson, TX 75081 Hewlett-Packard Taiwan

[phone] 8th Floor, H-P Building

337 Fu Hsing North Road

Taipei, Taiwan

(886 2) 712-0404

1-4 Getting Started

Returning Your Local Oscillator Source for Service

Hewlett-Packard has sales and service oces around the world to provide complete support

for your local oscillator source . To obtain servicing information or to order replacement parts,

contact the nearest Hewlett-Packard sales and service oce listed in Table 1-1 .

Use the following procedure to return your local oscillator source to Hewlett-Packard 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 specic 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 Performance Test record

any other specic data on the performance of the local oscillator source

CAUTION

Damage can result if the original packaging materials are not used. Packaging

materials should be anti-static and should cushion the local oscillator source 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.

2. Place the local oscillator source in its original packaging materials

.

If the original packaging materials are not available, you can contact a Hewlett-Packard

sales and service oce 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 local oscillator source with at least 3 to 4 inches of its original packing material

or bubble-pack to prevent the local oscillator source from moving in its shipping container

.

4. Place the local oscillator source, 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

local oscillator source and allow at least 3 to 4 inches on all sides for packing material.

5. Seal the shipping container securely with strong nylon adhesive tape.

6. Mark the shipping container \FRAGILE, HANDLE WITH CARE" to help ensure careful

handling.

7. Retain copies of all shipping papers.

Getting Started 1-5

1-6 Getting Started

Table 1-2. Packaging for a 2/8 Module

Item Description HP Part Number Qty

1 Carton-outer 5180-8479 1

2 Carton-inner 9211-4781 1

3 Carton-sliders 5180-2369 1

4 Foam inserts 4208-0493 1

5 Foam pads 5180-8469 2

Module Verication Software

Module Verication Software is a program that is designed to automate module verication

tests and adjustment procedures. Included in this chapter is a step-by-step procedure to load

the software and get the verication tests or adjustment procedures underway.For more

detailed information, refer to the sections regarding individual menus.

This documentation supports Module Verication 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 Verication Manual

conguration information for predened models of HP 70000 Series modular spectrum

analyzer systems. The software automatically reads your system conguration data from the

Hewlett-Packard Modular System Interface Bus (HP-MSIB) to determine which system or

modules you are using.

contains

2

Module Verication Software 2-1

Computer Compatibility

Module Verication Software is written in HP BASIC 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

dierences appear in the menus and softkeys displayed on-screen. (Refer to \Alternate Key

Labels" for an explanation of keyboard dierences.)

Alternate Key Labels

For 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.

Keyboard Key Labels

4

EXECUTE

4

ENTER

4

RUN

5

::::: ::::::: :::::: ::::::: ::::::: ::::::: ::::::::::::: ::::::: :::::: ::::::: :::: ::::

5

:::::: :::::: ::::::: ::::::: ::::::: :::::: :::::::::::::: :::::: ::::::: ::::::: :::: :::::

5

:::::: ::::::: :::::: ::::::: ::::::: :::::: :::::::::::::: :::::: :::::::

::::: ::::::: ::::::: :::::: ::::::: ::::::: ::::::::::::

Alternate Key Labels

4

RETURN

4

RETURN

press

4

SYSTEM

5

, then

NNNNNNNNNN

N

RUN

NNNNNNNNNNNNNNNNNNNNNNNNNN

press

4

CONTINUE

5

::::::: ::::::: :::::: ::::::: ::::::: :::::: ::::::::::::::

4

SYSTEM

5

, then

CONTINUE

Computer Language Compatibility

Module Verication Software runs on HP BASIC 4.0, or later, with the BIN les in RAM that are

listed below. A procedure for loading HP BASIC is provided in \Installing Module Verication

Software".

CLOCK ERR HPIB MAT

CS80* GRAPH IO MS

DISK

y

GRAPHX KBD PDEV

z

*Optional { supports Winchester disk drives.

y

Optional { supports microoppies and older Winchester disk drives

z

Optional { provides debugging features for program development.

.

5

5

In a shared resource management (SRM) environment, the following BIN les are also required:

DCOMM

SRM

Note

If you have set up some RAM memory for specic usage

, be aware that this

program uses RAM memory Volume \:MEMORY, 0, 15". Move any information

stored at this Volume to another location before running Module Verication

Software.

2-2 Module Verication Software

Printer Compatibility

Module Verication 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 Verication Software 2-3

Conguring the Hardware

1. Connect the HP 70000 Series modular spectrum analyzer system to the computer port

determined by the following criteria:

For 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. If needed,

refer to the

For 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 0.5 meter HP-IB cable (HP 10833D BNC 0.5 meter HP-IB cable, or 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 Peripheral Installation Guide,Volume 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 specied for the verication 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. If you nd this occurring, connect the disk drive to a

separate HP-IB interface.

2-4 Module Verication Software

Installing Module Verication Software

Use the following steps to get the program loaded and running. Later sections of this chapter

contain more specic program-operation information.

Two assumptions are made with the Module Verication Software. One is that you are using

standard HP-IB addresses for the active devices of the microwave test station. The second

is that all passive devices for the microwave test station are available. If either of these

assumptions is inaccurate, you are prompted for data during program execution.

1. View the version number of the software program after loading the rst program disk.

Look in the right-hand side of the initial display. Specic numbers vary, but the version

number looks like this:

Rev. A.02.00

2. Locate the program part number printed on the disk labels.

3. Load HP BASIC 4.0 or later, with the appropriate binaries, into an HP 9000 Series 200/300

controller. If necessary, refer to an HP BASIC reference manual.

CAUTION

Make backup copies of all write-protected disks. If 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.

4. Assign the MSI (mass storage is) to the drive you will use as the default drive

example, assigning the MSI to a disk drive looks like this:

5. Insert Executive Disk 1 into the assigned default drive

MSI ":,700,0"

. Type the following command line:

.Asan

LOAD "MOD_VERF",1

6. Press

7. Follow the on-screen prompts and load Executive Disk 2. Press

Note

4

EXECUTE

5

. The software version number appears in the screen that is next displayed.

Executive Disk 2 may require up to two minutes

Be sure the Executive Disk 3 you load is the disk that belongs with the module

4

CONTINUE

5

. Loading

.

you wish to test.

NNNNNNNNNNNNNNNNNNNNNNN

8. Replace Executive Disk 2 with Executive Disk 3, then press

PROCEED

. If the date and time

prompt appears, enter the date and time in the specied format. (This message appears

only if date and time are not current.)

9. If you are using your module's software for the rst time, a message appears stating that

mass storage data is needed. Press

NNNNNNNNNNNNNNNNNNNNNNN

PROCEED

and follow the on-screen prompts to create a

mass storage data le. Once mass storage data is stored, this message will not reappear

.

10. An error message may be displayed at this point. If the DUT (device under test) does not

match the module listed in the HP-MSIB Address Map, or if 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.

11. Load the Operating Disk as directed. The Operating Disk probably needs to remain in the

drive specied as the MSI default drive. Load the Driver Disks into the drive specied

on-screen.

NNNNNNNNNNNNNNNNNNNNNN

12. Load all Driver Disks. Insert each Driver Disk and press

N

PROCEED

. This process may

require up to six minutes.

13. 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

Module Verication Software 2-5

Data screen. Press

CREATE

to access this screen. For a detailed explanation of entering

calibration data, refer to \Edit Calibration Data" under \Menus" in this chapter. Enter

the serial number for each device specied, or bypass the device to continue if it is not

used now. After entering and storing data for passive devices, this prompt screen will not

reappear.

NNNNNNNNNNNNNNNNNNNN

Note

In the future, you can access calibration data stored on Operating Disks, 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.

You are prompted to enter serial numbers for these devices only.

14. You may perform any of the items listed below after satisfying the above conditions:

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Select

FINAL TEST

to perform procedures for which the required test equipment is present,

automatically.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Press

equipment menu

and return to the Equipment Menu. From here you can modify the

status of the equipment in the menu (make it unavailable, readdress it, change the private

bus, and so on). Refer to \Equipment Menu" under \Menus" in this chapter

NNNNNNNNNNNNNNNNNNNNNNNNNNNN

N

Press

test menu

already entered either the verication test or adjustment menus

choose one or the other does not reappear.To retrieve the Test or Adjust selection screen,

select

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

main menu

aware that pressing

to choose between verication tests or adjustment procedures. If you have

, the screen allowing you to

from the Test Menu softkeys. In the Main Menu, press

NNNNNNNNNNNNNNNNNNNNNNN

RESTART

purges status information for any tests you have already run.

.

NNNNNNNNNNNNNNNNNNNNNNN

RESTART

.Be

You determine individual tests or individual adjustments to perform via the menu you select.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Press

MAIN MENU

to customize your test process via any other menu.

2-6 Module Verication Software

Module Verication Software Overview

Testing Multiple Modules

Module Verication Software tests only one module at a time. If you have more than one

module to test in your system, test them separately. If you have tested a module and want to

change the module being tested without turning o the controller, follow the steps below.

N

1.

Get to the Main Menu, then press

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

equipment menu

.

2. In the Equipment Menu edit screen, move the item indicator to the Device Model number

column next to the Module Under Test.

NNNNNNNNNNNNNNNNNNNN

3. Press

4.

5.

Press

SELECT

N

NNNNNNNNNNNNN

DONE

, modify the model number, and press

N

, then

NNNNNNNNNNNNNNNNNNNNNNNNNNNN

main menu

.

4

ENTER

5

.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

From the Main Menu, press

under test is ____; but the software supports the ____ module

NNNNNNNNNNNNNNNNNNNN

RELOAD

and follow the on-screen prompts to load test software,or

test menu

.If

ERROR MESSAGE: Selected instrument

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

CHANGE DUT

appears, press either

to gain

access to the Equipment Menu or HP-MSIB Address 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 Address Menu, select the module to test that

matches the software you already have loaded. Otherwise, press

NNNNNNNNNNNNNNNNN

ABORT

.

Error Messages or Warnings Dened

There are three kinds of error messages or warnings generated by the program.

One appears briey at the bottom of the CRT display

to a menu that asks you for corrections or modications

Another type of error message begins with

ERROR MESSAGE

. The program then goes automatically

.

and provides special softkeys.

These errors are user-correctable and anticipated by the program. There is usually a

Possible Fix

The nal type begins with

message displayed to help you clear the problem.

ERROR

and provides no special softkeys. The message informs you

of an unanticipated error. There is no suggested x displayed. If you cannot recover from

one of these errors, please contact your Hewlett-Packard Sales and Service Oce.

Final Tests Dened

Tests dened as Final Tests are a subset of all available verication tests for a given module

After

any

module-level adjustment or repair, run Final Tests. Once a module has passed

.

the Final Tests, install it into any mainframe and expect performance within its specied

characteristics.Perform tests classied as Additional Tests after troubleshooting or adjustments

to be sure of the proper operation of specic assemblies. The

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

N

FINAL TEST

softkey has no

dened purpose while performing adjustments.

Module Verication Software 2-7

Single Tests Dened

You may select individual tests with this program. Refer to \Test Menu" under \Menus" in this

chapter for a description of selecting individual tests. As explained in \Final Tests," specic

assembly performance is checked by running assembly-associated performance tests.

Printing Test Results

The program shows whether each procedure passed or failed. You may congure the computer

operations to format and print test results via the Parameter Menu. If an HP-IB printer is on

the bus and an address is provided in the Equipment Menu, and you congured the Parameter

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.

Power line frequency.

Test person's identication.

Test equipment model numbers and names, addresses, and ID or serial number.

The Summary Page 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 Verication Software

Menus

Menu Structure

The rst menu presented allows you to go to the Main Menu, to begin Final Tests, or to return

to the Equipment Menu. From the Main Menu, access any of the following menus:

Main Menu

Mass Storage Menu

Parameter Menu

Equipment Menu

Edit Calibration Data

HP-MSIB Address Menu

Test Menu

Except for the Test Menu, these menus are conguration 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 Test Menu, you select and execute module-related procedures. The Test Menu provides

some testing options. Refer to \Test Menu" in this chapter for details.

The Mass Storage Menu, the Parameter 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-specic 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

either one of these keys appears in the Edit Menu.

activates the column item where the cursor is located, while

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

SELECT/TOGGLE

activates predened choices in the menu.

exits the edit screen, then displays the menu's command

NNNNNNNNNNNNNNNNNNNN

SELECT

screen.

Command Screen Menus

The following softkeys are present for the command menus pictured in Figure 2-1 through

Figure 2-4. An additional softkey,

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

edit cal data

, appears only in the Equipment Menu

command screen. Refer to \Equipment Menu Command Screen" for information about this

softkey.

Module Verication Software 2-9

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 VOLUME.

The HP-MSIB Address Menu does not require this softkey, therefore it does not

appear in that command menu.

NNNNNNNNNNNNNNNNNNNN

CREATE

appears if you tried to store data without an existing le

available.

NNNNNNNNNNNNNNNNNNNN

CREATE

activates the store function and creates a

le on the OPERATING VOLUME.

NNNNNNNNNNNNNNNNNNNN

REPEAT

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.

NNNNNNNNNNNNNNNNN

ABORT

displays the Main Menu screen.

NNNNNNNNNNNNNNNNN

ABORT

is available in various

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

NNNNNNNNNNNNNN

quit

softkey.

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

produces a message asking you to press

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

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.

displays the quit screen. This softkey is available only from menu command

screens. After you press

BASIC operating system. The following two softkey selections are available via

NNNNNNNNNNNNNN

the

quit

softkey.

NNNNNNNNNNN

YES

stops the program, retains any data les you stored before

pressing

(You can press

NNNNNNNNNNNNNN

quit

, you are asked if you really want to return to

NNNNNNNNNNNNN

N

quit

, and returns you to BASIC operating system.

4

5

to restart the program and return to the

RUN

Main Menu. The program retains all previously entered and

stored data.)

NNNNNNNN

NO

displays the edit screen of the previous menu, or the command

screen if there is no edit screen.

Cursor Keys 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 Verication Software

Note

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

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

and

PREVIOUS PAGE

keys are provided to speed your vertical

searches.

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.

Aside from the common softkeys, there are two special softkeys presented in the Main Menu.

One is

NNNNNNNNNNNNNNNNNNNNNNN

RESTART

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

FINAL TESTS

softkey. Press

, which begins the nal test sequence for a module. The second is the

NNNNNNNNNNNNNNNNNNNNNNN

RESTART

to recongure the program and retest a module,orto

test a dierent module. Pressing this key aects the test status column of both the Test

Menu edit screen and HP-MSIB address screen. The remaining Main Menu softkeys include

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

mass storage

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

,

parameter menu

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

, and

equipment menu

. Each of these menus is explained in

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 BASIC operating system can use a number of mass storage devices

. These include internal

disk drives, external disk drives, and SRM systems.You are prompted to assign the areas where

the program stores system and operation data. Y

msus

(mass storage unit specier). An msus is a string expression that points to a mass storage

ou do this by assigning Volume Labels to an

location. A mass storage Volume is composed of one or more les. Files are data items or

subprograms.AVolume 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

olume Labels that show the

location of certain types of program information. These Volume Labels are explained below.

DATA is where the test results are temporarily stored.

ERROR LOG is where unanticipated errors are recorded for possible future use.

OPERATING is where all the program data is stored.

The program retrieves specic information from the following Volume Labels:

SYSTEM contains the Executive Disk 3 program code. There must be an msus assigned to this

Volume Label.

OPERATING contains the menu conguration les and calibration data.

DRIVER DISK contains the driver instrument control program code. There must be an msus

assigned to this Volume Label.

TEST DISK contains the module performance tests programs.

ADJUST DISK contains the module adjustment procedures.

Volume Labels each have a default msus. From the Mass Storage Menu, you can reassign the

current msus or directory path designation to another designation. You cannot edit Volume

Labels, but you may edit their msus designations and directory path data elds

.

Module Verication Software 2-11

Mass Storage Menu Edit Screen

The Mass Storage Menu softkeys and their functions are described below.

NNNNNNNNNNNNNNNNNNNN

SELECT

NNNNNNNNNNNNNN

DONE

activates the column item where the cursor is located.

exits the edit screen, then displays the Mass Storage Menu command screen.

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

<=more

and

more=>

indicate that you must

scroll the screen left or right to view o-screen column items.

Press

NNNNNNNNNNNNNNNNNNNN

SELECT

. Key in the new location (msus or Directory Path). Press

4

ENTER

5

when data

2.

entry for the selected item is complete.

Note

Leave the Directory Path eld blank unless you are using an SRM system, or

HP BASIC 5.0 (or later version) that uses directory path hierarchy.

NNNNNNNNNNNNNN

3. Repeat steps 1 and 2 until you have nished editing. Press

DONE

to display the Mass Storage

Menu command screen.

The Data Volume is predened to use RAM DISK

":MEMORY,0,0"

. If this RAM disk is not

initialized to at least 1040 records, or contains additional les not required by module

verication, BASIC 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

NNNNNNNNNNNNNNNNN

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

NNNNNNNNNNNNNNNNNNNN

CREATE

.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Next, press

main menu

to return to the Main Menu screen, or press

STORE

to save the edited data. Saving Mass Storage

. Do this

NNNNNNNNNNNNNN

EDIT

and return to the

Mass Storage Menu edit screen.

Parameter Menu

You may determine some operating conditions of the software program in the Parameter Menu.

You 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

softkey to select the parameter item and enter data, or toggle to a predened

state. The parameter items and their appropriate selections are dened below.

Parameter Menu Edit Screen

Results sent to: Your choices are Screen or Printer. Press

When

When

Screen

Printer

is displayed, the test results appear on the CRT.

is displayed, test results are displayed on-screen

and printed out.

Output Format:

Your choices are Graph or Table. Press

Graph

is displayed, test results are generated in a graph format

if appropriate for the particular test results (a graphics printer

is required if

Table

is displayed, the test results are output in a table format.

Printer

and

Graph

are both selected). When

2-12 Module Verication Software

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

SELECT/TOGGLE

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

SELECT/TOGGLE

.

. When

Printer Lines:

Lines allowed are from 50 to 70. Press

SELECT/TOGGLE

. Enter

a number from 50 to 70 to set the number of lines per printed

page.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Line Frequency: Valid frequency selections are 50 Hz, 60 Hz, and 400 Hz. Press

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

SELECT/TOGGLE

until the power line frequency for your system

is displayed. The line frequency value aects some test results.

Beeper to be activated:

Your choices are Yes or No. Press

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

SELECT/TOGGLE

. When

Yes

is displayed, the warning and time-lapse reminder beeps are

activated. WhenNois displayed, the program's beep feature is

disabled.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Verify equipment on HP-IB: Your choices are Yes or No. Press

your choice.

Yes

causes the program to verify the presence

SELECT/TOGGLE

to indicate

of each instrument on HP-IB at the address shown in the

Equipment Menu. SelectNoto bypass this feature.

Test person's ID:

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Press

SELECT/TOGGLE

, then enter your name or ID number to

include it on the output report.

Number lines added: Lets you include a printed message with the test results

Depending on the program, you can enter up to 30 lines

.

, with

no more than 30 characters per line. Enter the message you

wish to have printed in this screen by selecting User Line

User Line: 1. Position the cursor to the left-hand side of a User Line in the

menu. Press

2. The prompt,

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

SELECT/TOGGLE

.

Enter additional information

, appears.

.

Type in your message (up to 30 characters per line), then

press

4

5

ENTER

.

3. After you have entered your message, reposition the cursor

at

Number lines added:

your message occupies, then press

. Enter the number of user lines

4

ENTER

5

.

Parameter Menu Command Screen

NNNNNNNNNNNNN

N

Press

DONE

when you are nished with the Parameter Menu edit screen. The next screen

displayed is the command screen. Press

to return to the edit screen, or

NNNNNNNNNNNNNNNNNNNNNNNNNNNN

N

main menu

Saving Parameter Menu data for the rst time causes an error message

you to create a le. Do this simply by pressing

NNNNNNNNNNNNNNNN

N

STORE

to save any edited Parameter Menu data,

to return to the Main Menu screen.

NNNNNNNNNNNNNNNNNNNN

CREATE

.

NNNNNNNNNNNNN

N

EDIT

. The message prompts

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 PRIVATE 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 verication and adjustment testing. Refer to Chapter 7

and Chapter 6 for individual test descriptions and test setups

.

Module Verication Software 2-13

Equipment Menu Edit Screen

From the Equipment Menu edit screen you can enter data about your test equipment. You

cannot edit the DEVICE TYPE column.

You 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.Tests tagged with

NNNNNNNNNNNNNNNNNNNN

SELECT

, type the model number, then press

, edit the address, then press

Missing ETE

4

5

.

4

ENTER

ENTER

5

. If the DEVICE MODEL has no address in

is included in the Status column next to the tests that

Missing ETE

are not performed.

Valid 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.

For example, an HP 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

s that function as

slaves should match their master device's address.

Address passive devices (non-programmable devices such as sensors, directional bridges, and

detectors) as either

Available

in the address column requires entering calibration data and a serial number for

the device. The calibration data for a passive device is stored on Operating Disks

Passive devices tagged

AvailableorNot Available

Not Available

in the address column cause

.For some of the passive devices, entering

.

Missing ETE

to be

printed next to the test names on the test results that are output for any procedure that

required the missing device.Tests 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

Available

displayed in the address column must also have a serial-number entry

Missing ETE

are not performed.

. Press

4

5

ENTER

. Some passive devices

NNNNNNNNNNNNNNNNNNNN

SELECT

,

.

4. Enter 19 in the PRIVATE BUS column if you are to use a Microwave or Full Microwave

source with a network analyzer. Congure these instruments by connecting the source's

HP-IB cable to the network analyzer's SYSTEM INTERFACE connection.

a. Move the cursor through the DEVICE TYPE column until you reach the Full Microwave

or Microwave source, then move horizontally to the PRIVATE BUS column.

b. Enter19and press

4

ENTER

5

. The program enters the ADDRESS column data for the

selected source when 19 appears in the PRIVATE 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

NNNNNNNNNNNNNN

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. Do this simply by pressing

NNNNNNNNNNNNNNNNN

STORE

to save the edited data.

NNNNNNNNNNNNNNNNNNNN

CREATE

.

DONE

to enter the Equipment

This command screen displays the following additional softkeys:

2-14 Module Verication Software

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

edit cal data

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

NO ADDRESS

displays the Select Passive Device screen. From this screen, move the

cursor to the passive device that needs its calibration data edited.

NNNNNNNNNNNNNNNNNNNN

Press

SELECT

, then enter the required data. Refer to \Edit Calibration

Data" in this chapter for more information.

appears only if the program cannot nd an instrument at a specied

HP-IB address.To check which instruments are not responding, follow

the steps below.

1. Access 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

the ashing address and either correct the address or press

to delete all fault-addresses from the edit menu.

Note

Either exiting the Equipment Menu or entering the Test Menu causes the

program to search the addresses in the Equipment Menu for instruments

assigned to HP-IB, if this feature is selected in the Parameter Menu.

4. Press

to enter calibration data for passive devices. Pressing

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

main menu

edit cal data

to return to the Main Menu, or

displays the Select Passive Device screen. Refer to

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

edit cal data

the following section for more information.

Edit Calibration Data

The Select Passive Device screen displays all passive devices needing calibration data entered.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

N

Press

edit cal data

to enter the Select Passive Device screen. The program requires

calibration data for some of the passive devices listed in the Equipment Menu edit screen.

Note

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

to access the calibration data from that disk. If you only need to

NNNNNNNNNNNNNNNNNNNN

CREATE

to enter the Edit

Calibration Data screen, then begin at step 4.

1. Locate the cursor beside the device and press

SELECT

. The next screen displayed allows

you to delete or edit data related to the passive device.

NNNNNNNNNNNNNNNNNNNN

Note

Not all frequencies are listed on the screen at once. Be sure to enter calibration

data for frequencies listed on the next pages of the display.

2. If you edit the factory default FREQUENCY or CAL FACTORS values, enter valid calibration

factors for each frequency edited.

Module Verication Software 2-15

Note

For 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.

Passive Device

Mixers

:::::: ::::::: :::::: ::::::: ::::::: :::::: :::::::::::::: :::::: ::::::: ::::::: :::: :::

Directional Couplers

Noise Sources

Sensors

::::::: ::::::: ::::::: :::::: ::::::: ::::

:::::: :::::: ::::::: ::::::: ::::::: :::::: :::::::::::::: :::::: :

Calibration Factors

::::: ::::::: ::::::: :::::: ::::::: ::::::: ::::::::::::: ::::::: :::::: :

:::::: ::::::: :::::: ::::::: ::::::: :::::: :::::::::::::: :::::: ::::::: ::::::

0.3 to 1.6 (stored as a percentage by the program)

Edit Calibration Data Edit Screen

NNNNNNNNNNNNNNNNNNNN

1. Move the cursor to a column item and press

calibration factor, then press

4

ENTER

5

. (It is not necessary to enter new frequency values in

SELECT

. Enter the new frequency or

numeric order. The program sorts them before storing them on the Operating Disk.)

2.

To delete an item, move the cursor to the column item. Press

NNNNNNNNNNNNNNNNNNNN

SELECT

, clear the line, then

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

NNNNNNNNNNNNN

1. After you have entered the necessary data, press

N

DONE

. The Equipment Menu command

screen is displayed.

N

2.

From the command screen, you can press

NNNNNNNNNNNNNNNNNNNNNNNNNNNN

main menu

when you are ready to continue with

the program.

HP-MSIB Address Menu

16 to 24 dB

8to 11 dB

12 to 16 dB

The HP-MSIB Address 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. In other words, the address of the master

module determines the address of the system. For information on conguring the software to

test a specic module, refer to \Equipment Menu" in this chapter.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

There is no edit screen for this menu. The command screen has a

but requires no

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

SELECT MODULE

NNNNNNNNNNNNNNNNN

STORE

softkey. Locate the cursor next to the module you wish to test. Press

. Be sure the module selected here matches the

SELECT MODULE

Module Under Test

softkey

listed in

the Equipment Menu.

Test Menu

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Pressing

test menu

from the Main Menu screen accesses the Test or Adjust selection screen. If

ERROR MESSAGE: The ____ is listed as the DUT in the Equipment Menu, but the ____ is

selected in the HP-MSIB Address Menu

select either

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

MODIFY MODULE

to enter new ROM data or

appears, the possible x information suggests you

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

CHANGE DUT

to select the module you

wish to test.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

If you press

number to the module you want to test. If you press

MODIFY MODULE

, on-screen commands help you change the model and serial

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

CHANGE DUT

, go either to the Equipment

2-16 Module Verication Software

Menu to change the model number or to the HP-MSIB Address Map to select the module

number you want to test.

To begin the testing process, select

adjustments procedures. Press

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

main menu

NNNNNNNNNNNNNN

TEST

to run verication tests or

to return to the Main Menu.

NNNNNNNNNNNNNNNNNNNN

ADJUST

to perform

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

If you have pressed

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

main menu

NNNNNNNNNNNNNNNNNNNNNNN

,

RESTART

and want to get to the verication tests, press

FINAL TEST

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

,

TEST MENU

, and wish to get to the adjustment procedures, press

, then

NNNNNNNNNNNNNNNNNNNN

ADJUST

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

main menu

. If you are in the adjustment procedures

NNNNNNNNNNNNNNNNNNNNNNN

,

RESTART

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

,

TEST MENU

, then

NNNNNNNNNNNNNN

TEST

.

CAUTION

Pressing either

NNNNNNNNNNNNNNNNNNNNNNN

RESTART

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

or

equipment menu

any time after testing begins

purges Test 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 verication-test status will most likely be modied if

you are moving between modules, ETE model numbers, or to the adjustment

procedures.

After selecting

Tests

, the names of the verication tests are displayed. Review the Status

column for tests performed.

Additional 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

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

SINGLE TEST

. The Missing ETE screen displays the missing test equipment for that

Missing ETE

is listed. To

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

. If the

NNNNNNNNNNNNNNNNNNNN

CREATE

build the data le. After the problem is cleared, the Test Menu is displayed.

Test Menu Command Screen

The Test Menu only has a command screen. It deviates from the command screen formats

previously described. The following list denes the softkeys available in this menu.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

FINAL TEST

begins a sequence of nal tests, which are a subset of verication tests.A

full calibration requires all verication tests. Review the Test Menu Test

Name list for all available tests. During the nal test sequence, the keys

listed below are also available.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

END SEQUENCE

interrupts the test sequence at the end of the test

in progress. The Test Menu is displayed with an

additional softkey labeled

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

RESUME TESTING

. Press

this key to resume the test sequence where the

program left o.

NNNNNNNNNNNNNNNNN

ABORT

ends the testing process and displays the Test Menu.

From there you may choose some other action.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

N

RESUME TESTING

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

SINGLE TEST

allows you to continue the nal test sequence after you have pressed

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

FINAL TEST

followed by

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

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

END SEQUENCE

.

Missing ETE

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

SINGLE TEST

is listed in the

. The Missing

est Equipment

Menu via the Test Menu to install the missing test equipment, you lose

,

to

Module Verication Software 2-17

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

multiple test

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

N

repeat mult.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

more keys

the status of any tests that have run. To 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

.

NNNNNNNNNNNNNNNNNNNN

SELECT

to assign the rst number

NNNNNNNNNNNNNNNNNNNNNNNNNN

NNNNNNNNNNNNNNNNNNNN

SELECT

END LIST

when you are ready to begin testing. During testing, the following

softkeys are also available.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

N

END SEQUENCE

interrupts the test sequence at the end of the test in

progress, then displays the Test Menu.

NNNNNNNNNNNNNNNNN

ABORT

ends the testing process and displays the Test Menu.

From there you may choose some other action.

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

NNNNNNNNNNNNNNNNNNN

N

SELECT

, and so on. Continue

NNNNNNNNNNNNNNNNNNNNNNNNN

N

END LIST

sequence. During testing, the following softkeys are also available

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

END SEQUENCE

interrupts the test sequence at the end of the test in

progress, then displays the Test Menu.

NNNNNNNNNNNNNNNNNNN

N

SELECT

to start the test

.

NNNNNNNNNNNNNNNNN

n

ABORTnends

the testing process and displays the Test Menu. From

there you may choose some other action.

toggles between

NNNNNNNNNNNNNNNNNNNNNNN

SUMMARY

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

,

select output

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

, and

PURGE CAL DATA

and

the previously explained Test Menu command screen softkeys.

NNNNNNNNNNNNNNNNNNNNNNN

SUMMARY

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

select output

gives you a printout of the current tests run.

chooses an output device.You can print test results

by pressing

display by pressing

NNNNNNNNNNNNNNNNNNNNNN

N

PRINTER

, or you can print the current

NNNNNNNNNNNNNNNNNNN

N

SCREEN

. Press

NNNNNNNNNNNNNNNNNNN

N

RETURN

to return

to the previous set of softkeys in the Test Menu

command screen.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

PURGE CAL DATA

Pressing this softkey deletes stored calibration data

for the spectrum analyzer and any other calibration

routines used for testing. Before module verication

tests can be run again, equipment calibration routines

have to be redone.

,

2-18 Module Verication Software

Figure 2-1. Main Menu Softkeys

Module Verication Software 2-19

Figure 2-2. Mass Storage Menu and Parameter Menu Softkeys

2-20 Module Verication Software

Figure 2-3. Equipment Menu and HP-MSIB Map Screen Menu Softkeys

Module Verication Software 2-21

2-22 Module Verication Software

Figure 2-4. Test Menu Softkeys

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

HP BASIC Language Reference

for system error

information.

Aborted

You 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 specied 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).

You 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

to appear on-screen. You are returned to the Test Menu.

Undefined function or

Equipment list is not acceptable.

You attempted to enter the Test Menu, but the program could not locate all the instruments

for which you have specied HP-IB addresses.Verify 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

Address column.

ERROR: Address matches system disk drive

.

You 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.

You entered an HP-IB address outside the range 700 to 730, inclusive.

ERROR: Duplicate HP-IB address.

You attempted to exit the Equipment Menu after assigning the same HP-IB address to

dierent 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.)

.

.

ERROR: Non-responding HP-IB address

.

You attempted to exit the Equipment Menu after assigning an HP-IB address to an

instrument not responding on HP-IB.

Module Verication Software 2-23

ERROR: Search for ____ unsuccessful.

The program tried to nd the disk identied but could not. Either assign a drive to the disk

and press

NNNNNNNNNNNNNNNNNNNN

REPEAT

or insert the required disk into its appropriate drive. Press

NNNNNNNNNNNNNNNNNNNN

REPEAT

ERROR: Some devices listed as Available require serial numbers.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

You pressed

View Cal Data

, then selected a device to which you have not assigned a

required serial number. Display the Equipment Menu edit screen and assign the serial

number.

ERROR MESSAGE: Address is HP-IB controller address.

You 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:

NNNNNNNNNNNNNNNNNNNN

Press

REPEAT

to try again.

NNNNNNNNNNNNNNNNNNNN

Press

CREATE

to create a new le.

NNNNNNNNNNNNNNNNN

Press

ABORT

to return to the Main Menu.

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:

N

Press

NNNNNNNNNNNNNNNNNNN

REPEAT

to try again.

NNNNNNNNNNNNNNNNNNNN

Press

CREATE

to create a new le.

NNNNNNNNNNNNNNNNN

Press

ABORT

to return to the Main Menu.

.

ERROR MESSAGE: Attempt to Edit Mass Storage failed.

Your 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.

You pressed

NNNNNNNNNNNNNNNNN

Press

ABORT

NNNNNNNNNNNNNNNNN

ABORT

after pressing

to return to the Main Menu.

NNNNNNNNNNNNNNNNN

STORE

mass storage. The Mass Storage Menu failed.

ERROR MESSAGE: Bad instrument address in equipment list. Address matches

controller.

You entered an HP-IB address matching that of the controller

. HP-IB protocol allows only

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

. Enter valid frequencies for the

values that are ashing.

2-24 Module Verication Software

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

NNNNNNNNNNNNNNNNNNNN

REPEAT

to try again or press

4

CONTINUE

5

.

ERROR MESSAGE: DUT does not have an address.

You attempted to leave the Test Equipment Menu, but the program cannot verify the DUT

at the specied HP-IB address. First check the address. If 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 specied address, or HP-IB is at fault, or main power is o on the

DUT. Press

NNNNNNNNNNNNNNNNN

ABORT

, then return to the Equipment Menu to verify the address

.

ERROR MESSAGE: DUT was not found at address in equipment list.

NNNNNNNNNNNNNNNNN

The address specied for the DUT is not valid. Press

ABORT

, then return to the Equipment

Menu to verify the address.

ERROR MESSAGE: Equipment address matches external disk drive.

You 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. If the data le is available in a

Possible

location other than the one currently specied 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

NNNNNNNNNNNNNNNNNNNN

REPEATor4

CONTINUE

5

.

ERROR MESSAGE: Equipment does not have an address.

There is no address assigned to the DUT

. Return to the Equipment Menu edit screen and

verify or enter an address in the Address column.

ERROR MESSAGE: ERROR XXX in XXXXX ____ .

Module Verication Software 2-25

An unanticipated occurrence in the program caused a program failure.For clarication, call

your Hewlett-Packard Sales and Service Oce.

ERROR MESSAGE: File ____ not found while assigning I/O path.

NNNNNNNNNNNNNNNNN

You attempted to

the current Operating Disk.

STORE

a list (equipment, mass storage, or parameter) for the rst time on

Possible Fix

instructions appear with the on-screen error

message.Follow 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

to retry, or select

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

mass storage

to return to the Mass Storage Menu. From here

you can indicate a dierent mass storage drive.

ERROR MESSAGE: Parameter Menu data not found on ____.

The program could not nd Parameter Menu data le on the Operating Disk.

Fix

instructions appear with the on-screen error message. If the data le is available in a

Possible

location other than the one currently specied 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

NNNNNNNNNNNNNNNNNNNN

REPEATor4

CONTINUE

arameter

5

.

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

NNNNNNNNNNNNNNNNNNNN

REPEAT

to try again or

4

CONTINUE

5

to use default values.

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

. Either

load the correct software or select a dierent 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.

Possible Fix

instructions appear with the on-screen error message. If the data le is available in a

location other than the one currently specied 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

REPEATor4

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 Address Map do not agree.You are given

suggested x instructions either to modify the module or change the DUT.

ERROR MESSAGE: The Operating Disk is write protected.

Make a working copy of the Operating Disk and store the original in a safe place

, or remove

the write-protect.

2-26 Module Verication Software

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

to try again.

NNNNNNNNNNNNNNNNNNNN

Press

Press

CREATE

N

NNNNNNNNNNNNNNNN

ABORT

to create a new le.

to return to the Main Menu.

ERROR MESSAGE: Wrong device at specified address. DUT was expected at address ____.

The address specied for the DUT is actually that of a test instrument.

Possible Fix

instructions appear with the on-screen error message. If necessary, return to the Equipment

Menu.

ERROR MESSAGE: ____ Volume was not located.

NNNNNNNNNNNNNNNNNNNN

The program cannot access the listed Volume. If the Volume is correct, press

retry. If the Volume is incorrect, press

From here you can indicate a dierent mass storage medium for the V

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

mass storage

to return to the Mass Storage Menu.

olume in question.

REPEAT

FORMAT ERROR: Observe date format and character position.

You entered the date/time in an unacceptable format. Enter date/time in the format

yyyy

and

hh:mm

, then press

4

ENTER

5

.

Hdw Broken

Actual test results far exceed the expected results. This is often an indication of a hardware

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, or 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.

to

dd mmm

Passed

The module meets the tested characteristics.

You pressed

4

PAUSE

5

on the computer keyboard. Press

PAUSED. PRESS CONTINUE.

4

CONTINUE

5

to resume program

execution.

PRGM ERROR

The program detected an error within itself. For clarication contact Hewlett-Packard

Santa Rosa Systems Division

.

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 specied in the error message

.

Module Verication Software 2-27

Return to Equipment Menu to enter serial number for ____.

You 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-Packard

Santa Rosa Systems Division

for assistance.

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-Packard

Santa Rosa Systems Division

for assistance.

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 Verify HP-IB is set to ON in the P

arameter Menu, this error message displays the ETE

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

. Program

execution will resume in 10 seconds.

The 8902A needs repair (Error 6).

There is a problem related to the HP 8902A measuring receiver

to the Equipment Menu where you can enter a dierent model number

. Correct the fault or return

.

The DUT must have an HP-IB address.

You 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.

NNNNNNNNNNNNNNNNNNNN

You pressed

SELECT

with the cursor positioned in the rst column of the Mass Storage edit

screen or the Equipment Menu edit screen. This column cannot be edited.

THIS IS ____ AND FOUND DUPLICATE FILES: ____.

Contact Hewlett-Packard

Santa Rosa Systems Division

for assistance.

This test can not be selected because of missing ETE.

You were in either Multiple Tests or Repeat Multiple, then tried to select a test that has

missing ETE. This is not allowed. Check the Status column of the Test Menu to verify a

Missing ETE

tag next to the test name you attempted to select.

Timed Out

The program aborted the test.

2-28 Module Verication Software

WARNING: Duplicate Address

You entered a duplicate HP-IB address to an item in the Equipment Menu. (You may have

to scroll through the menu to nd the duplication.)

WARNING: Duplication may exclude specific tests.

You assigned two generic device functions to one ETE. (For 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.

You entered too many characters in a user's line of the Parameter Menu edit screen. Select

the line and enter 30 or fewer characters.

Write protected.

You attempted to store data on a write-protected disk. After correcting the fault, press

4

CONTINUE

5

.

Module Verication Software 2-29

3

Before Extensive Servicing

This chapter contains information to help identify and resolve some common problems that

may occur with your HP 70900B local oscillator source before extensive servicing.

Symptoms to 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 HP 70900B local oscillator source needs further servicing and

your HP 70900B local oscillator source is not experiencing any of the symptoms presented in

this chapter, refer to \Performing Related Adjustments and Verication Tests" in Chapter 4 to

determine which adjustments and verication tests must be performed and also Table 5-1 for a

list of recommended test equipment to use when assemblies are changed, repaired, or adjusted.

Note

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 Work Station" in Chapter 4.) If you do not wish to perform

the servicing yourself, return your HP 70900B local oscillator source to a

Hewlett-Packard service center. (Refer to \If You Want Hewlett-Packard to

Service Your Local Oscillator Source" in Chapter 1.)

Before Extensive Servicing 3-1

If the System's Power-On Self Test Fails

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 STATUS 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 local oscillator module

begins blinking on and o (triggered by the system sweep), and the ACT LED on each active

module's front panel is turned on.

If any module fails the self test, it will not establish a link with the display. If 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.

To 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, on the bottom of the HP 70001A mainframe

HP 70206A system graphics display.

, or on the rear panel of the

Figure 3-1. Line Voltage 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 by 20 mm 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

Check the A3 power supply by removing the module from the mainframe and installing it on

an extender cable (HP part number 70001-60013). With the power turned o, remove the

module's outer cover. Conrm that the yellow and green LEDs on the top of the A3 power

supply are lit. If any of these LEDs is not lit, the A3 power supply may need servicing.

Check the address map. (Refer to Table 3-1.)

Check the system interconnections.

If necessary, obtain service from Hewlett-Packard. Refer to \If You Want Hewlett-Packard to

Service Your Local Oscillator Source" in Chapter 1.

Table 3-1. Default HP-MSIB Address 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, HP 70905A/B RF section,

blank HP 70310 blank

RF sections

1

HP 70300 HP 70620 or HP 70621

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

HP 70906A/B RF section , HP 70908A RF section , HP 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.

For more information about addressing criteria, refer to

Installation and Verication Manual

.

2

3

HP 70810

HP 70000 Modular Spectrum Analyzer

Before Extensive Servicing 3-3

If Your HP 70900B Local Oscillator Source Is Powered On But

Not Responding Correctly

Many dierent things could cause this type of symptom.

To solve this problem:

Check the HP 70000 Series modular spectrum analyzer system display for error messages.

Check the address map to see that the HP 70900B local oscillator source is located at

row 0, column 18. All other modules should be in the order given in the address map

guidelines. (Refer to Table 3-1.)

Check that other modules in the system, cables, and connectors are connected and operating

correctly.

If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want Hewlett-Packard to

Service Your Local Oscillator Source" in Chapter 1.)

3-4 Before Extensive Servicing

If the STATUS ERR Indicator LED on the HP 70900B Local

Oscillator Source is Flashing

The HP 70900B local oscillator source communicates with the HP 70000 Series modular

spectrum analyzer system over the HP-MSIB. When the STATUS ERR indicator LED on the

HP 70900B local oscillator source ashes at a 1 Hz rate, the module cannot communicate over

the HP-MSIB.

To 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

Table 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

connections look correct, you may try replacing the HP-MSIB cables with new ones

If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want Hewlett-Packard to

Service Your Local Oscillator Source" in Chapter 1.)

. If these cable

.

Before Extensive Servicing 3-5

If More Than One Module's Error Indicator Is Flashing

The HP 70900B local oscillator source communicates with the HP 70000 Series modular

spectrum analyzer system over the HP-MSIB. When the STATUS ERR indicator LED on a

particular module ashes at a 1 Hz rate, the module cannot communicate over the HP-MSIB.

To 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

Table 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. If these cable

connections look correct, you may try replacing the HP-MSIB cables with new ones

If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want Hewlett-Packard to

Service Your Local Oscillator Source" in Chapter 1.)

.

3-6 Before Extensive Servicing

4

Troubleshooting

This chapter contains information about troubleshooting your local oscillator source . It 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 ow chart (as shown in Figure 4-2) directs you to the appropriate troubleshooting

procedures.

A listing of adjustments and verication tests that must be performed, as well as the

recommended test equipment that should be used when assemblies are changed, repaired, or

adjusted are presented at the end of this chapter.

Troubleshooting 4-1

Preparing a Static-Safe Work 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

Figure 4-1. Static-Safe Work Station

These two types of ESD protection must be used together. Refer to Table 4-1 for a list of

static-safe accessories and their HP part numbers.

CAUTION

4-2 Troubleshooting

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.Paper or

lint particles left on the contact surface can cause intermittent electrical

connections.

.

Preparing a Static-Safe Work Station

Reducing ESD Damage

To 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.

Personnel 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. If 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

short the center and outer conductors of the cable together.

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

. This procedure

should be performed at a static-safe work station.

Static-Safe ESD Accessories

Table 4-1. Static-Safe ESD Accessories

HP Part

Description

Number

2

9300-0797 Set includes: 3M static control mat 0.6 m

1.2m(2ft24 ft) and 4.6 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)

9300-1383 Wrist-strap, color black, stainless steel, without cord, has four adjustable

links and a 7 mm post-type connection.

9300-1169 ESD heel-strap (reusable 6 to 12 months).

Order the following by calling HP DIRECT at [phone] or through any Hewlett-P

Sales and Service Oce.

ackard

Troubleshooting 4-3

Troubleshooting Flow Chart

The (\Troubleshooting Flow Chart") for the HP 70900B local oscillator source directs you to

troubleshooting procedures in this chapter. The major decision blocks are described in the

following sections.

Figure 4-2. Troubleshooting Flow Chart

Does the Module Complete Power-Up?

The power-up sequence is performed automatically by the local oscillator source each time

power is applied. If the local oscillator source can't complete its power-up sequence, it will not

establish a link with the display. If this happens, all local oscillator source front panel LEDs

will ash on and o. (Refer to \If the System's Power-On Self Test Fails" in Chapter 3.)

4-4 Troubleshooting

Troubleshooting Flow Chart

Any Errors from the Analyzer Test?

To perform the analyzer-test sequence, press

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

ANALYZER TEST

on the system display. Always wait at least 30 seconds after power-up

before performing the analyzer-test sequence.

4

5

MENU

MISC

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Analyzer Test

NNNNNNNNNNNNNN

NNNNNNNNNNNNNN

,

MORE

NNNNNNNNNNNNNNNNNNNNNNN

,

SERVICE

, and

checks for the presence of

key reference signals, the ability of the three phase-lock loops to lock at their maximum and

minimum points, the linearity of all digital-to-analog converters (DACs), and analog-to-digital

converter (ADC) performance.

Can the Symptom Be Observed on the LO Output?

Reaching this point in the troubleshooting ow chart means the local oscillator source's

three phase-lock loops (PLLs) can lock. These PLLs are the A4 idler phase-lock loop, A6 YTO

phase-lock loop/A8 frequency control, and A7 FRAC'N synthesizer. Any remaining problems

are likely due to noise or sidebands, frequency-dependent unlocks, intermittent unlocks, faulty

rear panel outputs, or video detector failures. Can noise, sidebands, or unlock conditions be

observed on the local oscillator source 's rear panel LO signal? (The rear panel jack is A6A4

YTO lock microcircuit (J3).) If the symptom is present at A6A4 YTO lock microcircuit (J3),

observe the idler output. If the symptom is not present, observe the 300 MHz rear panel output

to verify that it meets its amplitude specication.

Can the Symptom Be Observed on the Idler Output?

Place the local oscillator source on an HP 70001-60013 extender module

. Remove the

local oscillator source cover. Can the noise, sidebands, or unlock conditions be observed on

the idler signal at A4A3 idler VCO microcircuit (J2)? If the symptom cannot be observed,

the problem is in the YTO lock loop. If it is observed at A4A3 idler V

CO microcircuit (J2),

inspect the signal at A7A1 FFS phase lock loop (J1). If the symptom is observed at A7A1

FFS phase lock loop (J1), refer to \A7 FRA

C'N Synthesizer Troubleshooting". If the symptom

is not observed at A7A1 FFS phase lock loop (J1), refer to \A4 Idler Phase-Lock Loop

Troubleshooting".

Can the Symptom Be Observed on the Rear-Panel 300 MHz Output?

Can the symptoms be observed on the two rear panel 300 MHz outputs? Measure the power of

the 300 MHz front panel calibrator signal. The power should be010 dBm60.3 dB.

Is the A2 Video Processor OK?

Perform the following steps to test the A2 video processor:

1. Set an HP 3325B synthesized function/sweep generator to the following settings:

FREQ

AMPTD

:::::: ::::::: ::::::: :::::: ::::::: ::::::: ::::::::::::: ::::::: ::::::: :::::: ::::: ::::::

:::::: :::::: ::::::: ::::::: :::::: ::::::: ::::::::::::: ::::::: ::::::: ::::::: :::: :::::::

DC OFFSET

FUNCTION

::::::: ::::::: :::::: ::::::: ::::::: :::::: :::::::::::::: :::::: ::::::: ::::::: :::: ::

::::: ::::::: :::::: ::::::: ::::::: :::::: :::::::::::::: :::::: ::::::: ::::

Triangle wave

20 Hz

2V

1V

2. Set the HP 70900B local oscillator source to the following settings:

SPAN

SWEEP TIME

SWEEP

Cal corrections

EXTERNAL TRIGGER

::::::: :::::: ::::::: ::::::: ::::::: :::::: :::::::::::::: :::::: ::::::: ::::::: :::: :::::::

::::::: ::::::: :::::: ::::::: ::::::: :::::: :::::::::::::: :::::: ::::::: ::::::: :

::::::: ::::::: :::::: ::::::: ::::::: :::::: :::::::::::::: :::::: ::::::: ::::::

:::::: ::::::: :::::: ::::::: ::::::: :::::: :::::::::::::: :::::: ::::::: ::::

::::::: ::::::: :::::: ::::::: ::::::: :::::: :::::::::::::: :::::: ::::::: ::

0Hz

60 ms

CONTINUOUS

ALL OFF

ON

Troubleshooting 4-5

Troubleshooting Flow Chart

3. Connect the front panel SYNC OUT of the HP 3325B synthesized function/sweep generator

to the HP 70900B local oscillator source's rear panel EXT TRIG. Connect the HP 3325B

synthesized function/sweep generator SIGNAL output to the HP 70900B local oscillator

source's rear panel VIDEO jack.

4. Verify that the triangle wave on the spectrum analyzer's display is linear. Check the

analog-to-digital converter bits. If necessary, use the dB/DIV and reference level to expand

the scale to inspect the least signicant bit (LSB). (1 LSB0.27 dB500V.) If the CRT

display is linear, either the A2 video processor or the A1A1 host/processor is faulty.

5. Check the detectors on the A2 video processor. With a signal on the screen and a span less

than 10 MHz, press the

SAMPLE, and NORMAL detectors all give similar amplitude readings in the uncorrected

mode (61 dB referenced to SAMPLE detector). If any problems are found, run the video

processor adjustment procedure described in Chapter 6. If the assembly cannot be adjusted,

change the A2 video processor.

Are the A9 Front Panel Indicators OK?

Run the LED Check verication test. If the test passes, run the remaining verication tests.

4

MENU

5

key,

NNNNNNNNNNNNNNNNN

TRACE

, then

NNNNNNNNNNNNNNNNNNNNNNNNNN

DETECTOR

.Verify that POS PK, NEGPK,

4-6 Troubleshooting

If Operating Errors Messages (2000{2999) Occur

If Operating Errors Messages (2000{2999) Occur

These operating errors occur when the processor on the A1A1 host/processor receives an

unrecognizable command.

2011

2034

Memory Overow

To solve this problem:

1. Conrm that the error is caused by the HP 70900B local oscillator source.

2. Make sure the error is not caused by a user-dened function, or any other

user-input command or program.

3. Execute a

Analyzer Programming Manual

DISPOSE ALL

command (refer to the

) and set N STATES to 0. This will erase all user

HP 70000 Modular Spectrum

input programs.

4. If the problem still exists, replace the A1A1 host/processor or A1A2 1/4 MB

RAM/ROM.

Test Switch Is On

To solve this problem:

1. Conrm that the error is caused by the HP 70900B local oscillator source

.

2. Make sure the error is not caused by a user-dened function, or any other

user-input command or program.

3. Set A1A1 host/processor (S2) switch 1 to the \1" position (open) when this error

code appears.

4. If the switch is already in the \1" position, replace the A1A1 host/processor

.

Troubleshooting 4-7

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.

Because HP 70900B local oscillator source assemblies operate inner-dependently, a single

problem can cause multiple errors. Troubleshoot these errors in the order in which they are

reported.

One or more of the following hardware error messages may appear on your system display;

these errors can occur at any time:

7000

7001,

7002

7003

7004

ROM check

This hardware error occurs when a checksum computed on the ROM at power-up fails.

To solve this problem:

1. Replace the A1A1 host/processor or the A1A2 1/4 MB RAM/ROM.

2. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want

Hewlett-Packard to Service Your Local Oscillator Source " in Chapter 1.)

1st LO unleveled

This hardware error, sent from slave modules, indicate the LO signal is unleveled.

To solve this problem:

1. Check the LO power at A6A4 YTO lock microcircuit (J3), the rear panel LO jack.

Refer to \YTO Unlock" under \A6 YTO Phase-Lock Loop/A8 Frequency Control

Troubleshooting".

2nd LO unlocked

2nd LO unlocked

These hardware errors, sent from slave modules, indicates a second LO is unlocked.

To solve this problem:

1. Check rear panel 300 MHz outputs. (Refer to \A4 Idler Phase-Lock Loop

Troubleshooting".)

2. Check 2nd LO and 2nd Mixer in front end.

7008

FFS handshake

The A1A1 host/processor originates this hardware error when it cannot communicate

with the A7A2 FFS analog through the W14 ribbon cable

To solve this problem:

1. Refer to \A7 FRAC'N Synthesizer Troubleshooting".

7010

FFS is unlocked

This hardware error, sent from the A7A2 FFS analog to the A1A1 host/processor,

indicates the A7 FRAC'N synthesizer is unlocked. It is sent from A7A2 FFS analog (J5)

pin 11, through ribbon cable W14, when the tune voltage to the A7A1 FFS phase lock

loop exceeds limits.

To solve this problem:

1. Refer to \A7 FRAC'N Synthesizer Troubleshooting".

4-8 Troubleshooting

.

If Hardware Error Messages (7000{7999) Occur

7011

7012

125 kHz to FFS

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

This hardware error, reported during a power-up or

N

Analyzer Test

sequence,

occurs when no 125 kHz signal is present at the 125 kHz detector in the A6A1 100

MHz reference. The detector converts the signal to a voltage that is sent from A6A1

100 MHz reference (J7) pin 2, through the A11 wiring harness, and to the A2 video

processor. The A1A1 host/processor reads this voltage with the analog-to-digital

converter in the A2 video processor. The error occurs also when the detected voltage

falls outside the +0.65 V to +0.85 V range.

To solve this problem:

1. Measure the voltage at A6A1 100 MHz reference (J7) pin 2. If the voltage is out of

range, the A6A1 100 MHz reference is faulty.

2. If the voltage at A6A1 100 MHz reference (J7) pin 2 is in range, measure the

voltage at A2 video processor (J3) pin 7. If this voltage is out of range, replace the

A11 wiring harness.

3. If the voltage at A2 video processor (J3) pin 7 is correct, the problem is a faulty A2

video processor.

Cannot lock YTO

This hardware error occurs when the A6 YTO phase-lock loop fails to phase lock. The

A1A1 host/processor attempts to lock the YTO at the beginning of a sweep by moving

the error voltage at A6A2 YTO lock (J2) o of the maximum or minimum rail value

.

The controller attempts to move the error voltage by changing the start-frequency

tune DAC on the A8 frequency control.

7013

To solve this problem:

1. Refer to \A6 YTO Phase-Lock Loop/A8 Frequency Control Troubleshooting".

Cannot ne tune YTO

This hardware error occurs when the A6 YTO phase-lock loop cannot be ne-tuned.

The A1A1 host/processor locks the YTO at the start of a sweep and tries to move the

error voltage at A6A2 YTO lock (J6) to 0 V by changing the start-frequency correction

DAC on the A8 frequency control.

To solve this problem:

1. Refer to \A6 YTO Phase-Lock Loop/A8 Frequency Control Troubleshooting".

Troubleshooting 4-9

If Hardware Error Messages (7000{7999) Occur

7014

7015

12.5 MHz to YTO lock

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

This hardware error, reported during a power-up or

N

Analyzer Test

sequence, occurs

when no 12.5 MHz signal is present at the 12.5 MHz detector in the A6A1 100 MHz

reference. The detector converts the signal to a voltage that is sent from A6A1 100

MHz reference (J5) pin 1, through the A11 wiring harness, to the A2 video processor.

The A1A1 host/processor reads this voltage with the digital-to-analog converter in the

A2 video processor. This error occurs also when the detected voltage falls outside the

+0.65 V to +0.85 V range.

To solve this problem:

1. Measure the voltage at A6A1 100 MHz reference (J5) pin 1. If the voltage is out of

range, the A6A1 100 MHz reference is faulty.

2. If the voltage at A6A1 100 MHz reference (J5) pin 1 is in range, measure the

voltage at A2 video processor (J3) pin 6. If this voltage is out of range, replace the

A11 wiring harness.

3. If the voltage at A2 video processor (J3) pin 6 is correct, the problem is a faulty A2

video processor.

YTO is unleveled

This hardware error occurs when the A6A5 YTO output fails to level. The signal

(HYOLVL) is sent from the A6A5 YTO through W15 pin 7 to the A8 frequency control,

where it is read by the A1A1 host/processor. This error usually occurs at an LO

frequency of 3 GHz, caused by the YTO.

7016

To solve this problem:

1. Refer to \A6 YTO Phase-Lock Loop/A8 Frequency Control Troubleshooting".

YTO is unlocked

This hardware error indicates an unlocked YTO PLL. The error occurs when the error

0

voltage at A6A2 YTO lock (J6) exceeds a

9 V to +9 V range. The signal is sent from

A6A2 YTO lock (J6) to the A1A1 host/processor through the A8 frequency control.

To solve this problem:

1. Refer to \A6 YTO Phase-Lock Loop/A8 Frequency Control Troubleshooting".

4-10 Troubleshooting

If Hardware Error Messages (7000{7999) Occur

7018

7019

50 MHz to sampler

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

This hardware error is reported during a power-up or

Analyzer Test

sequence,

and occurs when no 50 MHz signal is present at the 50 MHz detector in the A6A1

100 MHz reference. The detector converts this signal to a voltage that is sent from

A6A1 100 MHz reference (J7) pin 3, through the A11 wiring harness, and to the A2

video processor. The A1A1 host/processor reads this voltage with the analog-to-digital

converter in the A2 video processor. This error also occurs when the detected voltage

falls below 0.5 V.

To solve this problem:

1. Measure the voltage at A6A1 100 MHz reference (J7) pin 3. If it is between 0.35 V

and 0.5 V, replace the A6A1 100 MHz reference. If the voltage level is less than

0.35 V, the A6A1 100 MHz reference or A6A4 YTO lock microcircuit probably are

faulty.

2. If the voltage at A6A1 100 MHz reference (J7) pin 3 is correct, measure the voltage

at A2 video processor (J3) pin 1. If the voltage is out of range, replace the A11

wiring harness.

3. If the voltage at A2 video processor (J3) pin 1 is correct, the problem is a faulty A2

video processor.

300 MHz post lter

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

This hardware error is reported during a power-up or

N

Analyzer Test

sequence,

and occurs when no 300 MHz signal is present at the 300 MHz detector in the A4A1

300 MHz amplier. The detector converts this signal to a voltage that is sent from

A4A1 300 MHz amplier (J2) pin 1, through the A11 wiring harness

, to the A2 video

processor. The A1A1 host/processor reads this voltage with the analog-to-digital

converter in the A2 video processor. This error also occurs when the voltage falls

below +0.2 V.

To solve this problem:

1. Measure the voltage at A4A1 300 MHz amplier (J2) pin 1. If it is less than +0.2 V

the A4A1 300 MHz amplier is faulty.

2. If the voltage at A4A1 300 MHz amplier (J2) pin 1 is correct, measure the voltage

at A2 video processor (J3) pin 5. If the voltage is out of range, replace the A11

wiring harness.

3. If the voltage at A4A1 300 MHz amplier(J2) pin 1 is correct, the problem is a

faulty A2 video processor.

,

Troubleshooting 4-11

If Hardware Error Messages (7000{7999) Occur

7020

7021

300 MHz AGC

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

This hardware error is reported during a power-up or

Analyzer Test

sequence, and

occurs when the leveling-loop automatic gain control (AGC) voltage of the A4A1 300

MHz amplier is incorrect. The AGC voltage is sent from A4A1 300 MHz amplier

(J2) pin 2, through the A11 wiring harness, to the A2 video processor. The A1A1

host/processor reads this voltage with the analog-to-digital converter in the A2 video

processor. The error occurs when the voltage exceeds a +0.2 V to +1.5 V range.

To solve this problem:

1. Measure the voltage at A4A1 300 MHz amplier (J2) pin 2. If the voltage is out of

range, the A4A1 300 MHz amplier is faulty.

2. If the voltage at A4A1 300 MHz amplier (J2) pin 2 is correct, measure the voltage

at A2 video processor (J3) pin 3. If this voltage is out of range, replace the A11

wiring harness.

3. If the voltage at A2 video processor (J3) pin 3 is correct, the problem is a faulty A2

video processor.

600 MHz to idler

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

This hardware error is reported during a power-up or

Analyzer Test

sequence. The

600 MHz signal is output from an A4A1 300 MHz amplier doubler circuit and used in

the A4A3 idler VCO microcircuit. The error occurs when no 600 MHz signal is present

at the 600 MHz detector in the A4A1 300 MHz amplier

. The detector converts the

signal to a voltage that is sent from A4A1 300 MHz amplier (J6) pin 3, through the

A11 wiring harness, to the A2 video processor. The A1A1 host/processor reads this

voltage with the analog-to-digital converter in the A2 video processor

reported when the detected voltage falls below 1.1 V

.

. An error is

7022

To solve this problem:

1. Measure the voltage at A4A1 300 MHz amplier (J6) pin 3. If it is less than 1.1 V

,

the A4A1 300 MHz amplier is faulty.

2. If the voltage at A4A1 300 MHz amplier (J6) pin 3 is correct, measure the voltage

at A2 video processor (J3) pin 4. If this voltage is out of range

, replace the A11

wiring harness.

3. If the voltage at A2 video processor (J3) pin 4 is correct, the problem is a faulty A2

video processor.

Low idler range

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

This hardware error, reported from a power-up or

when the A4A2 idler lock detects an unlocked idler PLL loop

Analyzer Test

. The tests tune the idler

sequence, occurs

oscillator to its extremes in the low idler function (3.530 to 3.565 GHz) and check for

an unlock condition.

To solve this problem:

1. Refer to \Idler Unlock" under \A4 Idler Phase-Lock Loop Troubleshooting".

4-12 Troubleshooting

If Hardware Error Messages (7000{7999) Occur

7023

7024

High idler range

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

This hardware error, reported from a power-up or

Analyzer Test

sequence, occurs

when the A4A2 idler lock detects an unlocked idler PLL loop. The tests tune the idler

oscillator to its extremes in the high idler function (5.330 to 5.365 GHz) and check for

an unlock condition.

To solve this problem:

1. Refer to \Idler Unlock" under \A4 Idler Phase-Lock Loop Troubleshooting".

Tune DAC

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

This hardware error is reported only from the

Analyzer Test

sequence. It indicates

a nonlinear A8 frequency control start-frequency tune digital-to-analog converter

(DAC). The sweep DAC and binary span-attenuator DAC are set to 0 counts on the

A8 frequency control. The start-frequency tune DAC is then checked for linearity

through the tune + span line. This signal leaves through A8 frequency control (J5) pin

1, then passes through the A10 motherboard to the A2 video processor. The A1A1

host/processor monitors the signal with the DAC in the A2 video processor.

To solve this problem:

1. Check the A8 frequency control. A nonlinear

, start-frequency tune DAC is usually

caused by that assembly.

2. Check the A2 video processor. A nonlinear, start-frequency tune DAC; also can be

caused by the A2 video processor when the wrong multiplexer channel is enabled,

or when the A2 video processor is out of adjustment.

7025

Decade span

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

This hardware error is reported only from the

Analyzer Test

sequence.It

indicates a faulty decade-span attenuator on the A8 frequency control. The sweep

digital-to-analog converter (DAC) and binary span-attenuator DAC on the A8 frequency

control are set to 4,095 counts (fully on), and the start-frequency tune D

0 counts. During

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Analyzer Test

the decade span attenuator is stepped through its

AC is set to

positions, and the resulting output is sent to the tune + span line with A8 frequency

control (J5) pin 1. This signal passes through the A10 motherboard to the A2 video

processor. The A1A1 host/processor monitors this signal with the analog-to-digital

converter in the A2 video processor.

To solve this problem:

1. Check the A8 frequency control.

2. Check the A2 video processor. This error can occur when the wrong multiplexer

channel is enabled or when the A2 video processor is out of adjustment.

Troubleshooting 4-13

If Hardware Error Messages (7000{7999) Occur

7026

7027

Binary attenuator

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

This hardware error is reported only from the

Analyzer Test

sequence. It indicates

a faulty binary span attenuator digital-to-analog converter (DAC) on the A8 frequency

control. The A8 frequency control sweep DAC is set to 4,095 counts (fully on), the

decade span attenuator is set for zero attenuation, and the start frequency tune

DAC is set to 0 counts. The binary span attenuator DAC is then checked for linearity

with the tune + span line. This signal leaves through A8 frequency control (J5) pin

1, then passes through the A10 motherboard to the A2 video processor. The A1A1

host/processor monitors this signal with the analog-to-digital converter in the A2 video

processor.

To solve this problem:

1. Check the A8 frequency control.

2. Check the A2 video processor. This error can occur when the wrong multiplexer

channel is enabled or when this assembly is out of adjustment.

Sweep DAC

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

This error is reported only from the

N

Analyzer Test

sequence. It indicates a faulty

sweep digital-to-analog converter (DAC) on the A8 frequency control. The A8

frequency control binary span attenuator DAC and decade span attenuator are set for

zero attenuation, and the start-frequency tune DAC is set to 0 counts. The linearity

of the sweep DAC is then checked with the tune+span line. This signal leaves

through A8 frequency control (J5) pin 1, then passes through the A10 motherboard

to the A2 video processor. The A1A1 host/processor monitors this signal with the

analog-to-digital converter in the A2 video processor.

7028

To solve this problem:

1. Check the A8 frequency control;

2. Check the A2 video processor. This error also may occur if the wrong multiplexer

channel is enabled on the A2 video processor or if this assembly is out of

adjustment.

Correction DAC

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

This error is reported only from the

Analyzer Test

sequence. It indicates the

start-frequency correction digital-to-analog converter (DAC) on the A8 frequency

control is nonlinear.Testing the linearity of the start-frequency correction DAC

requires the A6 YTO phase-lock loop to lock. The start-frequency correction DACis

checked for linearity with the lock and roll oset line. This signal leaves through A8

frequency control (J5) pin 50, then passes through the A10 motherboard to the A2

video processor. A1A1 host/processor monitors this signal with the analog-to-digital

converter in the A2 video processor.

To solve this problem:

1. If the HP 70900B local oscillator source phase-locks when set to a 3 GHz CW

frequency or a 6.6 GHz CW frequency, the A8 frequency control is faulty.

2. If phase-locking does not occur, refer to \YTO Unlock" under \A6 YTO Phase-Lock

Loop/A8 Frequency Control Troubleshooting".

4-14 Troubleshooting

If Hardware Error Messages (7000{7999) Occur

7029

7030

7031

Video proc: 0 volt

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

This hardware error is reported during a power-up or

Analyzer Test

sequence.It

indicates that the analog-to-digital converter (ADC) on the A2 video processor is not

calibrated to a 0 V input.

The A1A1 host/processor checks ADC calibration by selecting the grounded

multiplexer input (A2 video processor (U3) pin 8) and reading its value with the ADC.

To solve this problem:

1. Refer to \Adjustment 01. Video Processor" in Chapter 6.

Video proc: 2 volt

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

This hardware error is reported during a power-up or

Analyzer Test

sequence.

It indicates the analog-to-digital converter (ADC) on the A2 video processor is not

calibrated to a 2 V input. The A1A1 host/processor checks ADC calibration by

selecting the 2 V input of the multiplexer (A2 video processor (U3)).

To solve this problem:

1. Refer to \Adjustment 01. Video Processor" in Chapter 6.

Idler is unlocked

This hardware error is reported from the A4A2 idler lock and occurs when the tune

voltage to the idler exceeds its limits.

The signal is sent from A4A2 idler lock (J1) pin 1, through the A11 wiring harness

,to

the A8 frequency control. The A1A1 host/processor monitors this signal.

7041

7042

To solve this problem:

1.

When errors 7019, 7020, and 7021 are also reported from

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Analyzer Test

troubleshoot them rst.

2. Refer to \Idler Unlock" under \A4 Idler Phase-Lock Loop Troubleshooting".

FFS won't tune low

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

This hardware error is reported during a power-up or

Analyzer Test

sequence.It

occurs when the A7 FRAC'N synthesizer unlocks when tuned to 35 MHz.

To solve this problem:

1. Refer to \A7 FRAC'N Synthesizer Troubleshooting".

FFS won't tune high

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

This hardware error is reported during a power-up or

Analyzer Test

sequence.It

occurs when the A7 FRAC'N synthesizer unlocks when tuned to 70 MHz.

To solve this problem:

1. Refer to \A7 FRAC'N Synthesizer Troubleshooting".

,

Troubleshooting 4-15

If Hardware Error Messages (7000{7999) Occur

7043

7044

Freq. assembly adjust

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

This hardware error is reported only from the

Analyzer Test

sequence. The sweep

and binary span digital-to-analog converters (DACs) are turned o and the zero-tune

DAC is set to 200 counts (00.5 V at A8 frequency control (TP1-2) and 4.5 V at A8

frequency control (TP1-1). This signal leaves through A8 frequency control (J5-1)

and passes through the A10 motherboard to A2 video processor (J2) pin 25 on the A2

video processor. The A1A1 host/processor reads the signal with the analog-to-digital

converter in the A2 video processor. This error occurs when the voltage at A8

frequency control (TP1-1) is greater than650 mV from 4.5 V.

To solve this problem:

1. Refer to \Adjustment 17. Frequency Control Voltage References" in Chapter 6,

\Adjustment 21. Tune + Span Oset" in Chapter 6, and \Adjustment 01. Video

Processor" in Chapter 6.

2. If the error persists, replace the A8 frequency control or A2 video processor.

YTO tuning range

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

This hardware error is reported during a power-up or

Analyzer Test

sequence.It

indicates the A6 YTO phase-lock loop has become unlocked at either 3 GHz or 6.6 GHz

(CW frequencies).

To solve this problem:

1. Refer to \YTO Unlock" under \A6 YTO Phase-Lock Loop/A8 Frequency Control

Troubleshooting".

7047

7048

RAM failure

This hardware error indicates a RAM failure.

To solve this problem:

1. Replace the A1A1 host/processor.

2. Replace the A1A2 1/4 MB RAM/ROM.

FFS won't unlock

This hardware error occurs when the A1A1 host/processor slews the A7 FRAC'N

synthesizer from one rail to another very quickly. It monitors the FFS unlock indicator

while it slews, looking for the proper unlock condition.

To solve this problem:

1. Check the A7A2 FFS analog.

4-16 Troubleshooting

If Hardware Error Messages (7000{7999) Occur

7050

Hardware conguration failure

This hardware error occurs when the conguration test, run shortly after power-up,

fails to determines if the local oscillator source is an HP 70900A local oscillator

source or an HP 70900B local oscillator source. The HP 70900B local oscillator source

contains circuitry on the A8 frequency control that adds a gain of 5 to the output of

the correction DAC. Using this circuit, the conguration test begins by tuning the

local oscillator source to a CW frequency of 3.1 GHz with the gain switch in the

gain-of-1 position. The correction DAC is loaded with a value that creates a DC oset

in the EYO tune voltage. This tune voltage is read by the processor through the A-to-D

on the A2 video processor. Next, the gain switch is set to the gain-of-5 position, and

the tune voltage again is read by the processor. A \hardware conguration failure" is

reported if the tune voltage with the switch in the gain-of-1 position is not stable,orif

the tune voltage with the switch in the gain-of-5 position falls outside a gain-of-2-to-10

window.

To solve this problem:

1. If other errors are reported with error 7050, troubleshoot those other errors rst, in

the order in which they appear.

2. Tune the local oscillator source to a CW of 3.1 GHz, while monitoring the LO output

on a spectrum analyzer with a span of about 50 MHz. A \hardware conguration

failure" will occur if the LO signal is o frequency

acquiring lock.

3. Check the A8 frequency control.

, unlocked, or shows noise while

Troubleshooting 4-17

If Series 8000 Error Messages (8000{8999) Occur

Series 8000 errors can be caused by problems in downloaded code.

To solve these problems:

1. Conrm that the error is caused by the HP 70900B local oscillator source. Make

sure the error is not caused by a user-dened function or by any other user-input

command or program.

2. If down-loaded code is not the source of the error, check the A1A1 host/processor

or the A1A2 1/4 MB RAM/ROM.

4-18 Troubleshooting

If Series 9000 Error Messages (9000{9999) Occur

If Series 9000 Error Messages (9000{9999) Occur

Series 9000 errors can be caused by incorrect information sent to the HP 70900B local oscillator

source from other modules in the system.

To solve these problems:

1. Conrm that the error is caused by the HP 70900B local oscillator source. Make

sure the error is not caused by a user-dened function or by any other user-input

command or program.

2. Check the A1A1 host/processor or the A1A2 1/4 MB RAM/ROM.

Troubleshooting 4-19

A1A1 Host/Processor and A1A2 1/4 MB RAM/ROM

Troubleshooting

Make sure that no two modules have the same HP-MSIB address. Duplicate addresses cause the

HP-IB to lock up. Install the HP 70900B local oscillator source on an HP 70001-60013 extender

module and remove the cover.

Power-Up Sequence Failures

The HP 70900B local oscillator source has failed its power-up sequence when any of the

following conditions exist:

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

No analyzer display appears when you press

4

DISPLAY

5

SELECT INST

.

All front panel LEDs stay on.

No front panel LEDs are on.

LEDs other than MEASURE are blinking.

If any of the above conditions exist, check the power supplies for the A1A1 host/processor at

the following points:

A1A1 host/processor (J6) pin 48

A1A1 host/processor (J6) pin 49

::::: ::::::: ::::::: ::::::: :::::: ::::::: ::::::::::

::::: ::::::: ::::::: :::::: ::::::: ::::::: ::::::::

If these voltages are incorrect, refer to \A3 P

ower Supply Troubleshooting".

+5.2 V60.1 V

+13.5 V60.2 V

If the voltages are correct, check the MSIB cable W20.

To check the cable:

1. Substitute the backplane interconnect cable (HP part number 5062-1933) from the

HP 70900B local oscillator source service kit.

2. Connect one end of the cable to A1A1 host/processor (J4) and the other end to the

extender module.

3. Connect the interconnect cable's power supply jack to A3 power supply (J4).

4. Power up the local oscillator source.

5. If the local oscillator source completes its power-up sequence, replace W20.

Front-Panel Self-Test LED Troubleshooting

If the SELF TEST LED on the front panel of the HP 70900B local oscillator source is on or

ashing after power up, it indicates one of the errors listed below

If the local oscillator source cannot complete the power-up sequence

.

, replace the

A1A2 1/4 MB RAM/ROM.

If the problem still occurs, replace the A1A1 host/processor.

SELF TEST and IDL LEDs on:

The ROM checksum test has failed. The ACT LED will also be on if more than one error has

been detected. Replace the A1A2 1/4 MB RAM/ROM if any of the following conditions are met:

No other LEDs on

SRQ on

TLK on

TLK and SRQ on

LSN on

4-20 Troubleshooting

A1A1 Host/Processor and A1A2 1/4 MB RAM/ROM Troubleshooting

LSN and SRQ on

LSN and TLK on

LSN,TLK, and SRQ on

SELF TEST, IDL, and FFS LEDs on:

The RAM checksum test has failed. The ACT LED will also be on if more than one error has

been detected. Replace the A1A2 1/4 MB RAM/ROM if any of the following conditions exist:

No other LEDs on

SRQ on

TLK on

TLK and SRQ on

SELF TEST, IDL, FFS, and YTO LEDs on:

The interrupt checksum test has failed. The ACT LED will also be on if more than one error

has been detected. Replace the A1 if any of the following conditions exist:

SRQ on

TLK on

TLK and SRQ on

LSN on

LSN and SRQ on

LSN and TLK on

LSN, TLK, and SRQ on

HP-IB Troubleshooting

To troubleshoot the HP-IB:

1. Verify the HP-IB address:

a.

Press

4

DISPLAY

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

5

ADDRESS MAP

.

b. Rotate the RPG knob until the HP 70900B local oscillator source address shows on the

map (the ACT LED should light when the address-map cursor encloses the LO module

address). Verify that the HP-IB address in the box is the desired address

.

c. If not, change the address, cycle power, and try again.

d. Verify that the LO SW/MEM switch is in the \MEM" position.

2. If the HP-IB address is correct, check A1S1 (HP-IB enable switch):

a. Verify that the HP-IB enable switch is in the \ON" position.

b. If it is not, set it to \ON" and try again.

3. Test the W20 back-plane interconnect cable:

a. Replace the W20 back-plane interconnect cable with the interconnect cable (HP part

number 5062-1933) from the HP 70900B local oscillator source service kit.

b. Plug the 50-pin interconnect into A1A1 host/processor (J4), then reinstall the A1A1

host/processor; into the HP 70900B local oscillator source.

c. Connect the interconnect to the extender module and the power supply connection to A3

power supply (J4).

d. Power up the local oscillator source .

e. If it now functions normally over HP-IB, replace the W20 back-plane interconnect.

4. If there is still a problem, replace the A1A1 host/processor

.

Troubleshooting 4-21

A1A1 Host/Processor and A1A2 1/4 MB RAM/ROM Troubleshooting

Normal/Test Switch Troubleshooting

CAUTION

If the HP 70900B local oscillator source will not complete its power-up sequence

above methods of isolating the problem have not succeeded:

1. Set the A1A1 host/processor (S2) NORMAL/TEST switch to the TEST position, and cycle the

local oscillator source's power.

If the local oscillator source still fails the power-up sequence, replace the A1A1

host/processor or A1A2 1/4 MB RAM/ROM.

If the local oscillator source passes the sequence, set the switch to the NORMAL position

and cycle the power.

If the local oscillator source cannot complete the power-up sequence, replace the A1A1

host/processor or A1A2 1/4 MB RAM/ROM.

Setting the NORMAL/TEST switch A1A1 host/processor (S2) to the TEST

position, then cycling power will cause all downloaded programs, user-dened

keys, contents of the recall registers, and all memory functions in the

HP 70900B local oscillator source to be erased.

and all

4-22 Troubleshooting

A3 Power Supply Troubleshooting

A3 Power Supply Troubleshooting

Check the two banks of LEDs on the top of the A3 power supply.Power supplies with green

LEDs (DS2) are fused by F1 (closest to the back of the local oscillator source). Power supplies

with yellow LEDs (DS1) are fused by F2. Both fuses are rated 2 A. All power supplies are

distributed to the board assemblies through the A11 wiring harness, except those listed below,

which are distributed through the A10 motherboard. The supply for the A9 front panel comes

from the A1A1 host/processor through the A10 motherboard.

A1A1 host/processor: +5.2 V, +13.5 V

A2 video processor: +15 V, +13.5 V, +5.2 V,05.3 V,013.5 V

A8 frequency control: +15 V, +13.5 V, +5.0 V,013.5 V

Blown Fuse Troubleshooting

The quickest way to troubleshoot a blown fuse is:

1. Remove the connectors from A3 power supply (J1) and A3 power supply (J2) (A11 wiring

harness connectors on top of the A3 power supply). Replace the blown fuse and power up

the HP 70900B local oscillator source

.

If the new fuse does not blow, replace A3 power supply (J1).

If the fuse does blow, remove all A11 wiring harness connectors from the top of the A4

Idler Phase-Lock Loop and A7 FRAC'N synthesizer. Then, replace the fuse. Replace the

A11 wiring harness connectors one at a time until the fuse blows and indicates the faulty

assembly.

CAUTION

Be careful not to oset the A11 wiring harness connectors when

connecting them to an assembly. Improper connection can damage the

local oscillator source.

2. If the fuse did not blow when A3 power supply (J1) was replaced:

a. Remove all A11 wiring harness connectors from the A6 YTO phase-lock loop

b. Follow the procedure above for A3 power supply (J2).

3. If the fuse blows again after removing the A3 power supply (J1) and A3 power supply (J2)

connectors:

a. Remove the A1A1 host/processor and power up the HP 70900B local oscillator source.

b. Then remove the A2 video processor and power up the HP 70900B local oscillator source

c. Finally, remove the A8 frequency control and power up the HP 70900B local oscillator

source.

d. If the fuse continues to blow after removing these assemblies, replace the A3 power

supply.

.

Troubleshooting 4-23

A3 Power Supply Troubleshooting

Loaded-Down Power Supply Troubleshooting

Use the procedure for blown fuses to troubleshoot individual power supply problems.Valid

power supply measurements are listed in Table 4-2. If the power supplies are close to their

ranges, it does not necessarily mean that the A3 power supply is faulty. More likely, a supply is

loaded down by another assembly.

Table 4-2. A3 Power Supply Measurements

Supply Measurement Point Valid Range

0

3.25 V A3 power supply (J1) pin 1

0

5.0 V A3 power supply (J1) pin 6

0

5.3 V A3 power supply (J1) pin 2

0

13.5 V A3 power supply (J1) pin 3

0

10 V A3 power supply (J1) pin 4

0

25 V A3 power supply (J1) pin 5

0

3.15 V to03.35 V

0

4.93 V to05.07 V

0

5.22 V to05.36 V

0

13.88 V to013.65 V

0

9.45 V to010.45 V

0

23.49 V to026.43 V

+5.0 V A3 power supply (J1) pin 7 +4.95 V to +5.08 V

+5.2 V A3 power supply (J4) pin 11 +5.1 V to 5.3 V

+13.5 V A3 power supply (J1) pin 9 +13.30 V to +13.65 V

+15 V A3 power supply (J1) pin 10 +14.25 V to +15.75 V

4-24 Troubleshooting

A4 Idler Phase-Lock Loop Troubleshooting

A4 Idler Phase-Lock Loop Troubleshooting

Idler Unlock

If an FFS unlock is reported along with an idler unlock, repair the FFS unlock before

performing this procedure.

1. Connect an HP 8566B spectrum analyzer to A6A3 idler buer (J3) idler buer out. Complete

\The State Worksheet", and then verify the power output under the following conditions:

Condition Power

IDLER is low

IDLER is high

:::::: ::::::: ::::::: :::::: ::::::: ::::::: ::::::::::::: ::::::: ::::015 to017 dBm

:::::: :::::: ::::::: ::::::: :::::: ::::::: :::::::::::::: :::::: ::::015 to016 dBm

If the power measured in step 1 is incorrect, connect an HP 8566B spectrum analyzer to

A4A3 idler VCO microcircuit (J2) idler PLL output. Verify the power output under the

following conditions:

Condition Power

IDLER is low

IDLER is high

:::::: ::::::: ::::::: :::::: ::::::: ::::::: ::

::::::: :::::: ::::::: ::::::: :::::: ::::::: :::

4to014 dBm (harmonics<0

0to010 dBm (harmonics<0

11 dBc)

9 dBm)

0

If the power or harmonics measured in step 2 are incorrect, refer to \A4 Idler Phase-Lock

Loop Troubleshooting".

If the power and harmonics levels are correct, check the power supplies going to A6A3 idler

buer (J2) at A11 wiring harness (P7). (A11 wiring harness (P7) is the A11 wiring harness

jack connected to A6A3 idler buer (J2).)

A11 wiring harness Power Supply

0

A11 wiring harness (P7) pin 1 (8 wire from A6A2 YTO lock)

A11 wiring harness (P7) pin 4 (91 wire from A3 power supply)

:::::: ::::::: :::::::

:::::: ::::::: :::

If the voltages measured in step 3 are correct, replace the A6A3 idler buer

.

5to012 V

+5 V60.2 V

If the power or harmonics in step 2 are incorrect and the A4A2 idler lock procedure reveals

no problem on the A4A2 idler lock, replace the A4A3 idler VCO microcircuit.

Frequency Error

1. Connect an HP 8566B spectrum analyzer to A7A1 FFS phase lock loop (J1) FFS VCO output.

a. Complete \The State Worksheet".

b. Verify that the FFS START and FFS STOP frequencies match the results on the

worksheet.

c. Measure the output power.

If the power is greater than 0 dBm, refer to \A7 FRAC'N Synthesizer Troubleshooting".

If the frequencies and power at A7A1 FFS phase lock loop (J1) are correct, refer to \A4

Idler Phase-Lock Loop Troubleshooting".

2. If the A4A2 idler lock is working properly:

a. Connect an HP 8566B spectrum analyzer to A4A3 idler V

CO microcircuit (J2).

b. Connect a DVM to A4A2 idler lock (J3).

Troubleshooting 4-25

A4 Idler Phase-Lock Loop Troubleshooting

c. Remove the cable from A4A2 idler lock (J2). The voltage should measure more negative

than023 V.

3. If the voltage is incorrect, replace the A4A2 idler lock. The signal on the HP 8566B

spectrum analyzer should measure within the following frequency ranges:

Condition Frequency

IDLER is low

IDLER is high

:::::: ::::::: ::::::: ::::::: :::::: ::::::: ::::::::::::: ::::::: ::::::: :::>

:::::: :::::: ::::::: ::::::: ::::::: :::::: :::::::::::::: :::::: ::::::: :::>

3585 MHz

5385 MHz

4. Reconnect the cable to A4A2 idler lock (J2), then remove the RF cable from A4A1 300 MHz

amplier (J1). The voltage at A4A2 idler lock (J3) should measure more positive than02V.

If the voltage is incorrect, replace the A4A2 idler lock. The signal on the HP 8566B

spectrum analyzer should be within the following frequency ranges:

Condition Frequency

IDLER is low

IDLER is high

5. If the frequencies measured in steps 3 and 4 are incorrect, replace the A4A3 idler V

:::::: ::::::: ::::::: ::::::: :::::: ::::::: ::::::::::::: ::::::: ::::::: :::<

:::::: :::::: ::::::: ::::::: ::::::: :::::: :::::::::::::: :::::: ::::::: :::<

3510 MHz

5310 MHz

CO

microcircuit. If the frequencies are correct, reconnect the RF cable to A4A1 300 MHz

amplier (J1).

6.

Press

4

MENU

NNNNNNNNNNNNNNNNNNNNNNN

5

BW, Swp

7. If the voltage at A4A2 idler lock (TP2) is between

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

SINGLE SWEEP

to initiate a sweep.

0

3 V and021 V and the HP 70900B local

oscillator source front panel IDL LED is on:

a. Measure the voltage at A1A1 host/processor (TP3) LIDLK.

b. If the voltage is a TTL high, troubleshoot the A4A2 idler lock.

c. If the voltage measured is a TTL low

, measure the voltage at A1 (J6) pin 41 on the A1A1

host/processor.

d. If the voltage is a TTL low, the A1A1 host/processor or A1A2 1/4 MB RAM/ROM is faulty

e. If the voltage is a TTL high, follow the LIDLK line through the A10 motherboard to the

A8 frequency control to see where the LIDLK changes state

.

.

8. Connect an HP 8566B spectrum analyzer to A4A2 idler lock (TP1) using a 1:1 probe and a

DC-blocking capacitor.

a. Check for a signal between 5 MHz and 130 MHz with an amplitude greater than

0

55 dBm.

If the signal meets these specications, the A4A2 idler lock is faulty.

If the signal falls out of the frequency range or has low amplitude

, change the A4A3 idler

VCO microcircuit.

A4A1 300 MHz Amplier Troubleshooting

1. Test the A6A1 100 MHz reference (J1) connection:

a. Connect an HP 436A power meter with an HP 8482A N(m) power sensor to A6A1 100

MHz reference (J1) 300 MHz out.

b. Verify that the power is greater than 0 dBm.

c. Connect an HP 8566B spectrum analyzer to A6A1 100 MHz reference (J1).

If the harmonics are025 dBc or greater, refer to \A6 YTO Phase-Lock Loop/A8

Frequency Control Troubleshooting".

4-26 Troubleshooting

A4 Idler Phase-Lock Loop Troubleshooting

If the harmonics at A6A1 100 MHz reference (J1) are less than025 dBc:, reconnect the

cable to A6A1 100 MHz reference (J1).

2. Test the CALIBRATOR connection:

a. Connect the power meter to the local oscillator source's front panel CALIBRATOR.

b. Verify that the power is010 dBm,60.3 dB.

If the power is incorrect, adjust or replace the A4A1 300 MHz amplier.

3. Test the rear panel 300 MHz #1 jack:

a. Connect the power meter to the local oscillator source's rear panel 300 MHz 1 jack.

b. Verify that the power is 0 dBm,61dB.

If the power out is incorrect, rst perform \Adjustment 05. Calibrator Output

Amplitude" in Chapter 6, then perform \Adjustment 06. 300 MHz Reference Output

Amplitude" in Chapter 6 as described in Chapter 6.

c. Connect the spectrum analyzer to the jack and measure the harmonics.

If the harmonics are030 dBc or greater, replace the A4A1 300 MHz amplier.

4. Repeat this procedure for the rear panel 300 MHz #2 jack.

5. Measure the voltage at A4A1 300 MHz amplier (J2) pin 1 (300 MHz post-lter detector).

If the voltage is less than or equal to +0.2 V

6. Measure the voltage at A4A1 300 MHz amplier (J2) pin 2 (A

If the voltage is greater than or equal to +1.2 V

Note

Component-level repairs should not be attempted on the M block of the

, replace the A4A1 300 MHz amplier.

GC voltage).

, replace the A4A1 300 MHz amplier.

schematic for A4A1 300 MHz amplier. This circuit (doubler 300 MHz to 600

MHz), has components that must be factory adjusted. The A4A1 300 MHz

amplier should be replaced if this circuit is suspect.

7. Measure the voltage at A4A1 300 MHz amplier (J6) pin 3 600 MHz detector

If the voltage is less than or equal to +1.1 V

, replace the A4A1 300 MHz amplier.

.

A4A2 Idler Lock Troubleshooting

1. Remove the A7 FRAC'N synthesizer and install it on extender cables.

2. Remove the A4A2 idler lock's cover.

3. To determine if the IDLER STATE is high or low, refer to \The State Worksheet".

4. Measure the voltage at A4A2 idler lock (J1) pin 3.

If the IDLER STATE is low, the voltage should be a TTL high.

If the IDLER STATE is high, the voltage should be a TTL low.

5. Measure the voltage at A4A2 idler lock (J4).

If the IDLER STATE is low, the voltage should be from03.5 V to09V.

0

If the IDLER STATE is high, the voltage should be from

0.5 V to +0.5 V.

6. If the voltage is incorrect, troubleshoot the A4A2 idler lock.

Troubleshooting 4-27

A4 Idler Phase-Lock Loop Troubleshooting

7. Measure the voltage at A4A2 idler lock (J5). For ambient temperatures (20Cto30C),

the voltage should be +12.0 V60.6 V.

If the voltage is incorrect, troubleshoot the A4A2 idler lock.

8. Measure the voltage at A4A2 idler lock (J6). If the IDLER STATE is low, the voltage should

be from00.5 V to +0.5 V. If the IDLER STATE is high, the voltage should be from07.5 V

to09V.

If the voltage is incorrect, troubleshoot the A4A2 idler lock.

9. Measure the voltage at A4A2 idler lock (J8). The voltage should be from +4 V to +5.1 V.

If the voltage is incorrect, troubleshoot the A4A2 idler lock.

10. Measure the voltage at A4A2 idler lock (J9). The voltage should be from09.0 V to010.1

V.

If the voltage is incorrect, troubleshoot the A4A2 idler lock.

Spurious/Sideband/Noise

In the following instructions assume that the frequency and power at the rear panel 300 MHz

outputs and at A4A3 idler VCO microcircuit (J2) (A4 idler phase-lock loop output) are correct.

If the rear panel 300 MHz signals are incorrect, refer to \A4 Idler Phase-Lock Loop

Troubleshooting".

If the A4 idler phase-lock loop output is incorrect, refer to \Idler Unlock" and \Frequency

Error" under \A4 Idler Phase-Lock Loop Troubleshooting".

Use this procedure to troubleshoot spurious signals, sidebands, or noise. This section applies if:

Spurious signals, sidebands, or high-noise conditions are found on the rear panel LO output

and at A4A3 idler VCO microcircuit (J2) A4 Idler Phase-Lock Loop output but not at A1 (J1)

FFS PLL output.

Spurious signals, sidebands, or noise conditions are found on the rear panel 300 MHz outputs

A4A1 300 MHz amplier (J4-J5) but not at A6A1 100 MHz reference (J1) A6A1 100 MHz

reference 300 MHz output.

1. If spurious, sidebands, or noise are on the A4 idler phase-lock loop output, perform steps 1a

and 1b.

a. Connect an HP 8566B spectrum analyzer to A4A3 idler VCO microcircuit (J2) A4 idler

phase-lock loop output. Spurious signals should be less than071 dBc for osets below

15 kHz. Spurs beyond the 15 kHz oset fall outside the YTO lock loop's bandwidth and

should be less than060 dBc.

If the spurs do not meet these specications, connect the spectrum analyzer to A1 (J1)

FFS PLL output.

If the spurs are on the FFS signal, refer to \A7 FRAC'N Synthesizer Troubleshooting".

b. The phase noise at A4A3 idler VCO microcircuit (J2) should be less than091 dBc at a 1

kHz oset (measured in a 1 Hz resolution bandwidth). If the phase-noise is not within

the this limit, connect the spectrum analyzer to the output of the A1 (J1) FFS PLL. The

phase noise should be less than094 dBc at a 1 kHz oset (measured in a 1 Hz resolution

bandwidth).

If the phase noise is not within the limit, refer to \A7 FRA

Troubleshooting".

4-28 Troubleshooting

C'N Synthesizer

A4 Idler Phase-Lock Loop Troubleshooting

Note

Phase noise measurements made with an HP 8566B spectrum analyzer are

based on the spectrum analyzer's typical noise performance rather than its

specied noise performance.

2. If spurious signals, sidebands, or noise are on the rear panel 300 MHz outputs and on the A4

Idler Phase-Lock Loop output (but not on the FFS PLL output), perform steps 2a and 2b.

a. Connect an HP 8566B spectrum analyzer's RF input, through a 300 MHz up-converter

to A4A1 300 MHz amplier (J5). (Refer to the end of Chapter 7 for information on

constructing the up-converter.)

b. Measure the phase noise at A4A1 300 MHz amplier (J5). The spurs should be less than

0

69 dBc and phase noise less than091 dBc (1 Hz) at a 1 kHz oset.

c. If the phase noise and spurs measure within these limits, continue with step 5.

d. If the limits are not met, connect A6A1 100 MHz reference (J1) (300 MHz out) to the

up-converter.

If the spur and noise performance still do not meet the limits, replace the A6A1 100

MHz reference.

If the specications are met, change or troubleshoot the following assemblies in the

order listed:

A4A3 idler VCO microcircuit

A4A2 idler lock

A4A1 300 MHz amplier

Note

The069 dBc spur limit out of the 300 MHz up-converter is not an HP 70900B

local oscillator source performance specication; it is an indication of

performance. A spur at this level would produce a spur on the high idler (worst

case) at about071 dBc.

3. The idler PLL produces output in two frequency ranges

, low and high. The range in use

depends on the LO frequency selected. The preceding steps checked for spurs in the idler

range used at that time. The following steps change the LO frequency so that the idler

output is switched to the frequency range not yet inspected. You can then check for spurs

in this range. If the spurs are not found in this frequency range, replace the A4A3 idler VCO

microcircuit.

4. Connect an HP 8566B spectrum analyzer to A4A3 idler VCO microcircuit (J2) and conrm

that spurs are present on the idler PLL output. (The HP 70000 Series modular spectrum

analyzer system must be in zero span.)

5. Press the following keys on the HP 70000 modular spectrum analyzer:

4

MENU

NNNNNNNNNNNNNNNNN

5

State

NNNNNNNNNNNNNN

More

NNNNNNNNNNNNNN

More

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Show states

.

Write down the LOSTART frequency. (LOSTART should equal LOSTOP.) The idler PLL output

changes its frequency range when the LO frequency passes through 4.4375 GHz:

LO Frequency Idler Frequency Range



4.4375 GHz

4.4375 GHz

:::::: ::::::: ::::::: :::::: ::::::: ::::::: ::::::::::::: :::

::::::: ::::::: :::::: ::::::: ::::::: :::::: :::::::::::::: :::

low (3.530 to 3.565 GHz)

high (5.330 to 5.365 GHz)

Troubleshooting 4-29

A4 Idler Phase-Lock Loop Troubleshooting

6. A change in the analyzer's center frequency produces an equal change in the analyzer's LO

and idler PLL frequencies.To change the idler PLL frequency range, press

then change the center frequency of the analyzer according to the following rules:

a. Change the center frequency by the amount needed for the LO frequency to pass

through the 4.4375 GHz point. For example, if the LO frequency is 5.0 GHz, decrease the

analyzer's center frequency more than 625 MHz. (5.0 GHz04.375 GHz = 0.625 MHz)

b. The change in center frequency must be a multiple of 25 MHz. This ensures that the FFS

PLL output frequency will not change. In the example in step a, the analyzer frequency

could be decreased by 650 MHz.

7. Locate the idler PLL output signal on the HP 8566B spectrum analyzer.

If no spurs are present, change the A4A3 idler VCO microcircuit.

If the spurs are present in both the low and high frequency ranges, the most likely causes

are the A4A2 idler lock or the A4A3 idler VCO microcircuit, (in that order).

NNNNNNNNNNNNNN

Freq

NNNNNNNNNNNNNNNNNNNN

Center

,

4-30 Troubleshooting

A6 YTO Phase-Lock Loop/A8 Frequency Control Troubleshooting

A6 YTO Phase-Lock Loop/A8 Frequency Control

Troubleshooting

YTO Unlock

The following measurement criteria are for functional values and are not intended as test

limits.Test limits are veried by HP Module Verication Software

Note

Any idler unlock or FFS unlock should be repaired before troubleshooting the

A6 YTO phase-lock loop/A8 frequency control.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Make sure

analyzer-test routine, press

Analyzer Test

has been run before starting this procedure.To perform the

4

MENU

NNNNNNNNNNNNNN

5

misc

NNNNNNNNNNNNNN

MORE

NNNNNNNNNNNNNNNNNNNNNNN

SERVICE

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

ANALYZER TEST

on the system

display. Always wait at least 30 seconds after power-up before performing the test.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Analyzer Test

checks the presence of key reference signals, the ability of the three

phase-lock loops to lock at their maximum and minimum points, the linearity of all

digital-to-analog converters (DACs), and analog-to-digital converter (ADC) performance

.

If any errors other than YTO unlocks 7012, 7013, 7016, or 7028 are reported, refer to the

HP 70000 Modular Spectrum Analyzer Installation and Verication Manual

1. Conrm that correct voltage levels are supplied to A6A1 100 MHz reference

.

, A6A2 YTO

lock, A6A3 idler buer, and A6A4 YTO lock microcircuit on the A11 wiring harness wiring

harness connectors.

2. The voltage at A6A1 100 MHz reference (J5) pin 1 should measure from 0.65 V to 0.85 V

This is the 12.5 MHz detector voltage (the 12.5 MHz signal is the YTO PLL's reference).

3. The voltage at A6A1 100 MHz reference (J7) pin 2 should measure from 0.65 V to 0.85 V

This is the 125 kHz detector voltage (the 125 kHz signal is the FFS PLL's reference).

4. The voltage at A6A1 100 MHz reference (J7) pin 3 should measure from 0.5 V to 2.1 V

is the 50 MHz detector voltage (the 50 MHz signal is the sampler bias level).

.

.

. This

5. Tune the analyzer to the settings that cause a YTO PLL unlock and ll in \The State

Worksheet".

6. Measure the A6 YTO phase-lock loop/A8 frequency control output power at the rear panel

LO jack (A6A4 YTO lock microcircuit (J3)). The power should be5 dBm but less than

12 dBm . If the power is not within this range, measure the power out of the A6A5 YTO.

The power should be 11 dBm63dB.

If the power is incorrect, replace the A6A5 YTO

.

If the power is correct, run \Adjustment 18. YTO Frequency Endpoints" in Chapter 6.

7. If the unlock condition still exists, with the analyzer in zero span, measure the power and

frequency of the Idler PLL signal supplied to A6A4 YTO lock microcircuit (J1).

a. Disconnect A6 YTO phase-lock loop (W18) at A6A4 YTO lock microcircuit (J1).

b. Measure the signal out of A6 YTO phase-lock loop (W18).

The correct idler frequency is calculated on \The State Worksheet", lled out at the start

of this procedure. The power should be within the limits below

.

Idler State Idler PLL Output Power to A6A4 YTO lock microcircuit (J1)

0

Low

:::::: ::::::: ::::::: :::::: ::::::: ::::::: ::::::::::::: ::::::: :::::: ::::::

15 to017 dBm

Troubleshooting 4-31

A6 YTO Phase-Lock Loop/A8 Frequency Control Troubleshooting

High

:::::: ::::::: :::::: ::::::: ::::::: :::::: :::::::::::::: :::::: ::::::: ::::::015 to016 dBm

If the power or frequency values are not correct, refer to \A4 Idler Phase-Lock Loop

Troubleshooting".

8. Reconnect A6 YTO phase-lock loop (W18). Monitor A6A2 YTO lock (TP1) with an

oscilloscope and a 10:1 probe. When the YTO is locked, there should be a 12.5 MHz

rectangular waveform of about 0.8 Vp-p (ECL levels through a capacitor). When the YTO is

unlocked, the waveform frequency will be in the 0 to 25 MHz range.

9. If the waveform at A6A2 YTO lock (TP1) has rounded edges:

a. Write down the spectrum analyzer's span and sweep-time settings.

b. Set the spectrum analyzer to a 1 GHz span with a sweep time of 20 seconds.

c. Initiate a sweep on the spectrum analyzer.

10. After the sweep is initiated, the waveform at A6A2 YTO lock (TP1) should be rectangular,

sweeping from 0 to 25 MHz.

If the waveform is still rounded or missing, place the A8 frequency control on extender

cables and remove the A6A2 YTO lock casting cover. (This does not require removing the

entire A6 YTO phase-lock loop.)

11. Use an HP 8566B spectrum analyzer and a 1:1 probe with a DC-blocking capacitor to check

0

A6A2 YTO lock (J1-1) for a signal level between

22 dBm and030 dBm, from 0 to 25 MHz.

If the signal is missing or low, check the voltages supplied to the A6A4 YTO lock

microcircuit.

If the voltages measure correctly, replace A6A4 YTO lock microcircuit.

0

If the signal at A6A2 YTO lock (J1-1) is greater than

22 dBm and the waveform is still

rounded, replace the A6A2 YTO lock.

12. Connect an oscilloscope with a 10:1 probe to A6A2 YTO lock (U3) pin 11. Conrm that a

12.5 MHz ECL rectangular wave is present.

If no signal is found, refer to \A6 YTO Phase-Lock Loop/A8 Frequency Control

Troubleshooting".

13. Set the HP 70000 Series modular spectrum analyzer system to a 100 Hz span. Use an SMB

snap-on tee to connect a digital voltmeter (DVM) between A6A2 YTO lock (J6) and (W4).

Connect an oscilloscope to A6A2 YTO lock (J5) pin 8. Refer to the \The State W

orksheet",

for the lock polarity value.

14. Find the values of A6A2 YTO lock (J5) pin 8 and the lock polarity in the following table

follow the instructions in the \Action/Status" column.

YTO PLL State

TTL Logic at

Lock Polarity Action/Status

A6A2 YTO lock (J5) pin 8

TTL High POS Functioning properly

TTL Low NEG Functioning properly

TTL Low POS Replace A8 frequency control

TTL High NEG Replace A8 frequency control

15. Remove the cable to A6A2 YTO lock (J4) and observe the voltage at A6A2 YTO lock (J6).

Find the values of A6A2 YTO lock (J5) pin 8, A6A2 YTO lock (J6), and the lock polarity in

the following table, then follow the instructions in the \A

ction/Status" column.

4-32 Troubleshooting

A6 YTO Phase-Lock Loop/A8 Frequency Control Troubleshooting

YTO PLL State (W19 Removed)

TTL Logic at

Lock Polarity Voltage at A6A2 YTO lock (J6) Action/Status

A6A2 YTO lock (J5) pin 8

TTL High NEG or POS +9 V Functioning properly

TTL High POS

TTL Low NEG or POS

TTL Low NEG

<

+9 V* Replace A6A2 YTO lock

<09V* Functioning properly

>09V

y

Replace A6A2 YTO lock

*<indicates \more negative than"

y>indicates \more positive than"

16. Replace the cable to A6A2 YTO lock (J4). Remove the power supply connector on top of

A6A4 YTO lock microcircuit and observe the voltage at A6A2 YTO lock (J6). Find the

values of A6A2 YTO lock (J5) pin 8, A6A2 YTO lock (J6), and the lock polarity in the

following table, then follow the instructions in the \Action/Status" column.

YTO PLL State (Power Removed)

TTL Logic at

Lock Polarity Voltage at A6A2 YTO lock (J6) Action/Status

A6A2 YTO lock (J5) pin 8

TTL High NEG or POS

TTL High POS

TTL Low NEG or POS

TTL Low NEG

<09V* Functioning properly

>09V

>

<

+9 V

y

y

Replace A6A2 YTO lock

Functioning properly

+9 V* Replace A6A2 YTO lock

*<indicates \more negative than"

y>indicates \more positive than"

17. Replace the power supply connector on top of A6A4 YTO lock microcircuit. Install the

connector with the red wire toward the rear panel. Initiate an analyzer sweep

0

If the voltage at A6A2 YTO lock (J6) is between

UNLOCKED

is still displayed, check A6A2 YTO lock (J5) pin 6 for a TTL low.

8 V and +8 V and the message

.

YTO IS

If A6A2 YTO lock (J5) pin 6 is not TTL low, replace the A6A2 YTO lock.

18. Connect an HP 3325B synthesized function/sweep generator to A8 frequency control (J1).

Set the function generator for a09 V to +9 V sine wave of 1 kHz.

19. Connect an HP 8566B spectrum analyzer to the rear panel LO jack (A6A4 YTO lock

microcircuit (J3)).

If the signal excursion is between 30 to 45 MHz, the A6 YTO phase-lock loop/A8

frequency control is probably functioning properly.

If the signal excursion at A6A4 YTO lock microcircuit (J3) is outside this range, connect

an oscilloscope to A8 frequency control (TP4-4).

20. The signal at A8 frequency control (TP4-4) should be a09 V to +9 V,60.5 V sine wave.

If the sine wave is not present, replace A8 frequency control.

If it is present but the signal excursion is incorrect, change the A6A5 YTO

.

21. Change the function generator frequency to 20 Hz.

If the signal excursion on the HP 8566B spectrum analyzer is not between 30 and 45

MHz, replace the A8 frequency control.

Troubleshooting 4-33

A6 YTO Phase-Lock Loop/A8 Frequency Control Troubleshooting

A6A1 100 MHz Reference Troubleshooting

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Fill out \The State Worksheet" and make sure

this procedure.To perform the analyzer-test routine, press

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

ANALYZER TEST

on the system display. Always wait at least 30 seconds after power-up before

Analyzer Test

4

MENU

has been run before starting

NNNNNNNNNNNNNN

5

NNNNNNNNNNNNNN

misc

MORE

NNNNNNNNNNNNNNNNNNNNNNN

SERVICE

performing the test.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Analyzer Test

checks the presence of key reference signals, the ability of the three

phase-lock loops to lock at their maximum and minimum points, the linearity of all

digital-to-analog converters (DACs), and analog-to-digital converter (ADC) performance.

If any errors other than YTO unlocks 7012, 7013, 7016, or 7028 are reported, refer to the

HP 70000 Modular Spectrum Analyzer Installation and Verication Manual

.

1. Set an HP 8566B spectrum analyzer to the following settings:

Center Frequency

Span

:::::: ::::::: :::::: ::::::: ::::::: :::::: :::::::::::::: :::::: ::::::: ::::::: :::: ::::::

Resolution BW

:::::: ::::::: :::::: ::::::: ::::::: :::::: :::::::::::::: :::::: :::::::

100 MHz

::::: ::::::: ::::::: ::::::: :::::: ::::::: ::::::::::::: ::::::: ::::::: ::::::

1 MHz

10 kHz

2. Connect the HP 8566B spectrum analyzer to A6A1 100 MHz reference (J1). If the signal

measures less than02 dBm, perform \Adjustment 03. 300 MHz Bandpass Filter" in

Chapter 6. After performing this adjustment, the signal at A6A1 100 MHz reference (J1)

should be greater than02 dBm. If the power is still low

, check \The State Worksheet" for

the value of REF.

If REF is INTERNAL, perform step 2a.

If REF is EXTERNAL and no external reference is applied, perform step 2b

.

a. Connect a DVM to A6A1 100 MHz reference (J3) pin 5.

If the voltage at A6A1 100 MHz reference (J3) pin 5 is a TTL high, replace the A6A1

100 MHz reference.

If the voltage at A6A1 100 MHz reference (J3) pin 5 is other than a TTL high, change

the A8 frequency control.

b. Check A6A1 100 MHz reference (J3) pin 2 with a DVM.

If the voltage is greater than +25 mV, replace the A6A1 100 MHz reference.

If it is less than or equal to +25 mV

, replace the A2 video processor.

3. Connect an HP 8663A synthesized signal generator to A6A1 100 MHz reference (J2). Set

the generator to 100 MHz at 0 dBm.

4. Set the HP 70000 Series modular spectrum analyzer system to continuous-sweep mode.

If the analyzer's extended state shows internal reference, measure A6A1 100 MHz

reference (J3) pin 2 with a DVM.

If the voltage at pin 2 measures less than or equal to +50 mV, replace the A2 video

processor.

If the voltage at A6A1 100 MHz reference (J3) pin 3 is less than +50 mV, replace the

A6A1 100 MHz reference.

5. Connect an oscilloscope with a 10:1 probe to A6A1 100 MHz reference (J4). Check for an

emitter-coupled logic (ECL) signal at 12.5 MHz.

If a signal of approximately 0.8 Vpp is not present, change the A6A1 100 MHz reference.

6. Tune the HP 70000 Series modular spectrum analyzer system to a center frequency of 300

MHz and a span of 1 MHz.

7. Use an HP 5316B universal counter to verify that a 125.00 kHz pulse is present at A6A1

100 MHz reference (J6).

4-34 Troubleshooting

A6 YTO Phase-Lock Loop/A8 Frequency Control Troubleshooting

If no pulse is found, check A6A1 100 MHz reference (J7) pin 4 with a DVM.

If the voltage at A6A4 YTO lock microcircuit (J7) measures05V, change the A6A1 100

MHz reference.

If it measures 0 V, change the A8 frequency control.

8. Tune the spectrum analyzer to a center frequency of 300 MHz and a span of 100 Hz.

9. Use the universal counter to verify that a 124.84 kHz signal is present at A6A1 100 MHz

reference (J6).

If no signal is found, check A6A1 100 MHz reference (J7) pin 4 with a DVM.

If the DVM measures 0 V, change the A6A1 100 MHz reference.

If it measures05V, change the A8 frequency control.

10. Check A6A1 100 MHz reference (J8):

a. Place the A1, A3 power supply, and A8 frequency control on extenders.

b. Remove semirigid cable W17 (A4A3 idler VCO microcircuit (J2) to A6A3 idler buer

(J1)).

c. Unsnap semirigid cable A6 YTO phase-lock loop (W16) (A6A5 YTO to AT1) from the clips

on the A10 motherboard.

d. Remove the four screws securing the A6 YTO phase-lock loop to the

local oscillator source's frame.

e. Remove the A6A1 100 MHz reference cover.

f. Connect an oscilloscope with a 10:1 probe to A6A1 100 MHz reference (J8).

If a 50 MHz waveform is not present, change the A6A1 100 MHz reference

.

Spurious/Sideband

All spurious signals and sidebands are referred to as spurs in this procedure

. The

troubleshooting procedure is the same for both. This procedure applies to HP 70900B local

oscillator sources that have spurs on A6A1 100 MHz reference (J1) (300 MHz output) or spurs

on the rear panel LO output, but not on A6A3 idler buer (J3) idler buer output.

1. Complete \The State Worksheet" to determine key frequencies and switch positions at the

settings where the spurs occur.

If the power or frequency of the rear panel LO output jack is incorrect, refer to \YTO

Unlock" under \A6 YTO Phase-Lock Loop/A8 Frequency Control Troubleshooting".

If the power or frequency of the front panel CALIBRATOR jack or rear panel 300 MHz

jacks is incorrect, refer to A6A1 100 MHz reference.

2. Connect an HP 8566B spectrum analyzer to the local oscillator source 's rear panel LO

output jack (A6A4 YTO lock microcircuit (J3)). Refer to \External Frequency Reference

Chapter 8 to lock the local oscillator source's reference to the HP 8566B spectrum analyzer

3. Initiate a sweep on the HP 70000A modular spectrum analyzer to enable the external

reference.

4. If the spurs disappear, the internal reference is causing the spurs. Replace the A6A1 100

MHz reference. Leave the external reference connected.

5. If the spurs are not caused by the internal reference and occur in osets less than 1 kHz,

place the HP 70900B local oscillator source on an HP 70001-60013 extender module.

"in

.

If no spurs are present or if they are greatly reduced in amplitude, replace the A8

frequency control.

6. Perform \LO Output Spurious Response Test" in Chapter 7.

If the test fails, perform \Adjustment 14. FFS Spurious Responses" in Chapter 6.

Troubleshooting 4-35

A6 YTO Phase-Lock Loop/A8 Frequency Control Troubleshooting

If the spurs at A6A4 YTO lock microcircuit (J3) are 24 kHz sidebands, replace the A6A5

YTO or A8 frequency control.

If the spurs are 40 kHz sidebands, connect the HP 8566B spectrum analyzer to the idler

output (A4A3 idler VCO microcircuit (J2)).

If 40 kHz spurs of similar amplitude are present on the idler output, replace the A3

power supply.

If the sideband amplitude is dierent or if no 40 kHz sideband is found, replace the

A6A5 YTO.

7. All spurs should be less than071 dBc at room temperature.

If the spurs are071 dBc, connect an HP 8566B spectrum analyzer to A6A3 idler buer

(J3) idler buer output.

If the spurs at A6A3 idler buer (J3) are present, refer to \Spurious/Sideband/Noise"

under \A4 Idler Phase-Lock Loop Troubleshooting".

8. If no spurs are present at A6A3 idler buer (J3), connect the HP 8566B spectrum analyzer

to A6A1 100 MHz reference (J4) (12.5 MHz reference output) through a DC-blocking

capacitor.

If the spurs are at A6A1 100 MHz reference (J4), replace the A6A1 100 MHz reference

9. If spurs are not found:

a. Connect A6A1 100 MHz reference (J1) 300 MHz reference output to the input of the 300

MHz up-converter.

b. Connect the output of the up-converter to the input of the HP 8566B spectrum analyzer

(Instructions for assembling the 300 MHz up-converter are included in Chapter 7.)

If the spurs of interest are greater than069 dBc, change the A6A1 100 MHz reference.

10. If no failed assembly has been found, the most probable causes of the spurs are the A6A5

YTO and the A8 frequency control, in that order

.

.

.

4-36 Troubleshooting

A7 FRAC'N Synthesizer Troubleshooting

A7 FRAC'N Synthesizer Troubleshooting

FFS Unlock

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Make sure

analyzer-test routine, press

Analyzer Test

has been run before starting this procedure.To perform the

4

MENU

NNNNNNNNNNNNNN

5

misc

NNNNNNNNNNNNNN

MORE

NNNNNNNNNNNNNNNNNNNNNNN

SERVICE

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

ANALYZER TEST

on the system

display. Always wait at least 30 seconds after power-up before performing the test.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Analyzer Test

checks the presence of key reference signals, the ability of the three

phase-lock loops to lock at their maximum and minimum points, the linearity of all

digital-to-analog converters (DACs), and analog-to-digital converter (ADC) performance.

If any errors other than YTO unlocks 7012, 7013, 7016, or 7028 are reported, refer to the

HP 70000 Modular Spectrum Analyzer Installation and Verication Manual

.

Tune the HP 70000 analyzer to the settings where any A7 FRAC'N synthesizer unlock occurs.

Fill out \The State Worksheet", and troubleshoot the unlock conditions with the following

procedure. If the A7A2 FFS analog was replaced, make sure that the SMB cables were

correctly reconnected.

1. Connect an HP 5316B universal counter to A6A1 100 MHz reference (J6).

If no signal is present, refer to A6A1 100 MHz reference

.

2. Connect a DVM to A6A1 100 MHz reference (J7) pin 4. Measure the frequency at A6A1

100 MHz reference (J6) with the universal counter. The signal should be at ECL levels

(high00.98 V, low01.63 V). Table 4-3 shows the correct voltage and frequency values

for the \divide" number listed on the state worksheet.

If the voltage is incorrect, change the A8 frequency control.

If the voltage is correct but the frequency is not, change A6A1 100 MHz reference

.

Table 4-3.

Measurements at A6A1 100 MHz Reference (J6) and (J7) Pin 4

Divide Number A6A1 100 MHz reference (J7) Pin 4 A6A1 100 MHz reference (J6)

4

800

4

801 0V 124.84 kHz

0

5V 125 kHz

3. Check A7A1 FFS phase lock loop (J1):

a. Connect an HP 8566B spectrum analyzer to A7A1 FFS phase lock loop (J1) (A7 FFS V

output).

b. Connect +10 V from a DC power supply to A7A1 FFS phase lock loop (J3) (FFS V

CO

tune). The signal frequency should be less than 33.5 MHz, with a power level greater

than 0dBm.

CO

c. Connect07 V from a DC power supply to A7A1 FFS phase lock loop (J3). The signal

frequency should be greater than 70 MHz with a power level greater than 0 dBm.

If the power level is low or the frequency extremes cannot be met, change the A7A1 FFS

phase lock loop.

4. Reconnect cable W3:

a. Lay the HP 70900B local oscillator source on its side so the A1A1 host/processor is on the

bottom.

Troubleshooting 4-37

A7 FRAC'N Synthesizer Troubleshooting

b. Remove the three screws securing the A7 FRAC'N synthesizer to the bottom of the

local oscillator source.

c. Remove cable W3 (125 kHz reference) from A7A2 FFS analog (J2).

d. Slide the assembly upward about one-half inch, and pull the end with the LED outward.

e. Rotate the assembly 180 degrees so the top of the assembly is against the top cabling of

the rest of the local oscillator source .

f. Reconnect cable W3 to A7A2 FFS analog (J2).

5. Check the pulse at ECL levels:

a. Connect an HP 3325B synthesized function/sweep generator to the high-impedance input

of an oscilloscope.

b. Set the function generator to a 10 MHz square wave at ECL levels (high00.98 V, low

0

1.63 V).

c. Connect the function generator to A7A1 FFS phase lock loop (J5).

d. Connect a cable from A6A1 100 MHz reference (J6) to A7A1 FFS phase lock loop (J6)

(125 kHz).

e. Connect an oscilloscope to A7A1 FFS phase lock loop (J4).

f. Verify that a pulse at ECL levels is present.

If a pulse is not found or is at a level other than ECL, replace the A7A1 FFS phase lock

loop.

If the pulse is present, replace the cables to the A7A1 FFS phase lock loop

.

6. Check the signal at A7A1 FFS phase lock loop (J7):

a. Remove the cable connected to A7A1 FFS phase lock loop (J3) and place a 50  load on

the jack.

b. Connect an oscilloscope, using the 50  impedance setting, to A7A1 FFS phase lock loop

(J7).

c. Verify that a signal greater than 50 mVpp is present at A7A1 FFS phase lock loop (J7).

If the signal is less than or equal to 50 mVpp, replace the A7A1 FFS phase lock loop.

If the amplitude is above this value, replace the A7A2 FFS analog.

Spurious Signals/Noise

When the A7 FRAC'N synthesizer is the source of spurious signals or noise

, troubleshoot with

the procedure below.

If noise is the problem, connect a spectrum analyzer through a DC-blocking capacitor to

A6A1 100 MHz reference (J7).

If the spurious signal or noise is present on the 124.84/125 kHz signal, replace the A6A1 100

MHz reference.

1. If no spurious signal or noise is found, check if the noise increases when the FFS PLL output

frequency is closer to 70 MHz than when it is near 45 MHz. For every 1 Hz increase in LO

frequency, the FFS PLL output decreases 1 Hz. This process is repeated every 25 MHz.

2. Determine the FFS frequency from \The State W

orksheet", and then tune the LO

accordingly.

4-38 Troubleshooting

A7 FRAC'N Synthesizer Troubleshooting

If the noise does increase, replace the A7A1 FFS phase lock loop.

If the noise occurs in osets greater than 3 kHz, the most probable cause is the A7A1 FFS

phase lock loop.

3. If the noise occurs in osets less than 3 kHz:

a. Connect an HP 8663A synthesized signal generator to the HP 70900B local oscillator

source rear panel 100 MHz input.

b. Set the signal generator to 100 MHz at 0 dBm.

c. Initiate a sweep on the HP 70900B local oscillator source to enable the external

reference.

If the noise is gone, replace the A6A1 100 MHz reference.

If the noise remains, replace the A7A2 FFS analog.

Troubleshooting 4-39

If You Have Verication Test Failures

These troubleshooting suggestions are listed by verication test number. If the

local oscillator source fails a verication test, look up that test in the list and follow the

instructions.

Before troubleshooting, always make sure the failure is not caused by the test equipment.

If a previous repair involved removing assemblies, make sure that the connector pins were not

bent during replacement.

If Test 01. 300 MHz Reference Output Power and Harmonics Fails

To solve this problem:

1. Perform a calibrator output amplitude adjustment (see Chapter 6).

2. Perform a 300 MHz reference output amplitude adjustment (see Chapter 6).

3. Otherwise, troubleshoot the A4A1 300 MHz amplier.

4. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want Hewlett-Packard

to Service Your Local Oscillator Source " in Chapter 1.)

If Test 02. LO Output Power and Harmonics Fails

To solve this problem:

1. If the power-out test fails, troubleshoot the A6 YTO phase-lock loop.

2. If the harmonics test fails, replace the A6A5 YTO.

3. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want Hewlett-Packard

to Service Your Local Oscillator Source " in Chapter 1.)

If Test 03. Residual FM (Span>10 MHz) Fails

This test checks the residual FM of the A6A5 YTO and the tuning control of the A8 frequency

control in a non-phase-locked condition.

To solve this problem:

1. Check the A6A5 YTO.

2. Check the A8 frequency control.

3. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want Hewlett-Packard

to Service Your Local Oscillator Source " in Chapter 1.)

If Test 04. LO Output Spurious Response Fails

To solve this problem:

1. Perform the low-idler adjustment (see Chapter 6).

2. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want Hewlett-Packard

to Service Your Local Oscillator Source " in Chapter 1.)

4-40 Troubleshooting

If You Have Verication Test Failures

If Test 05. LO Display Sidebands Fails

To solve this problem:

1. Replace the A6A5 YTO.

2. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want Hewlett-Packard

to Service Your Local Oscillator Source " in Chapter 1.)

If Test 06. LO 40 kHz Sidebands Fails

To solve this problem:

1. Check the A3 power supply and A6 YTO phase-lock loop housing:

a. Remove the A1A1 host/processor and install it on board extender cables.

b. Remove the screws that fasten the A3 power supply to the A6 YTO phase-lock loop

housing.

c. Install the HP 70900B local oscillator source on an HP 70001-60013 extender module.

d. Tune the local oscillator source to the frequency that failed and monitor the sideband

with a spectrum analyzer.

e. Gently pull the A3 power supply away from the A6 YTO phase-lock loop housing.

f. If the sideband amplitude changes more than 2 dB, replace the A3 power supply

.

2. Troubleshoot the A6A5 YTO or the A8 frequency control.

3. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want Hewlett-Packard

to Service Your Local Oscillator Source " in Chapter 1.)

If Test 07. Reference Oscillator Accuracy Fails

To solve this problem:

1. Perform a calibration output frequency adjustment (see Chapter 6), and retest.

2. Troubleshoot the A6A1 100 MHz reference.

3. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want Hewlett-Packard

to Service Your Local Oscillator Source " in Chapter 1.)

If Test 08. Calibrator Amplitude Accuracy Fails

To solve this problem:

1. Perform a calibrator output amplitude adjustment (see Chapter 6) and retest.

2. Troubleshoot the A4A1 300 MHz amplier.

3. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want Hewlett-Packard

to Service Your Local Oscillator Source " in Chapter 1.)

Troubleshooting 4-41

If You Have Verication Test Failures

If Test 09. 300 MHz Reference Amplitude Accuracy Fails

To solve this problem:

1. If this test fails for power only, perform a calibrator output amplitude adjustment, then

perform a 300 MHz reference output amplitude adjustment (see Chapter 6).

2. If the test still fails, or if the harmonics test fails, troubleshoot the A4A1 300 MHz amplier.

3. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want Hewlett-Packard

to Service Your Local Oscillator Source " in Chapter 1.)

If Test 10. Video Detector Tracking Fails

To solve this problem:

1. Troubleshoot the A2 video processor; make sure it is correctly adjusted.

2. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want Hewlett-Packard

to Service Your Local Oscillator Source " in Chapter 1.)

If Test 11. External Triggering F

ails

To solve this problem:

1. Check the A1A1 host/processor.

2. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want Hewlett-Packard

to Service Your Local Oscillator Source " in Chapter 1.)

If Test 12. Video Processor Noise Fails

To solve this problem:

1. Check the A2 video processor.

2. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want Hewlett-Packard

to Service Your Local Oscillator Source " in Chapter 1.)

If Test 13. LO Frequency and Span Accuracy (Span>10 MHz) Fails

1.

Run the

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Analyzer Test

(refer to Figure 4-2).

2. If no errors are reported, perform a frequency control voltage references adjustment, then a

YTO frequency endpoints adjustment (see Chapter 6). Rerun T

est 11. External Triggering.

3. Check the A6A5 YTO.

4. Check the A8 frequency control.

5. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want Hewlett-Packard

to Service Your Local Oscillator Source " in Chapter 1.)

4-42 Troubleshooting