HP (Hewlett-Packard) 8560A User Manual

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Service Manual

HP 8560A Spectrum Analyzer

SERIAL NUMBERS

Prefix

3207A

and Above

HEWLETT

Eiia

HP Part No. 08560-90081

Printed in USA

PACKARD

August 1992

@Copyright Hewlett-Packard Company 1990, 1992 All Rights Reserved. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. 1212 Valley House Drive, Rohnert Park, CA 94928-4999, USA

Certification

Hewlett-Packard Company certifies that this product met its published specifications at the time of shipment from the factory. Hewlett-Packard further certifies 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 HP. Buyer shall prepay shipping charges to HP and HP shall pay shipping charges to return the product to Buyer. However, Buyer shall pay all shipping charges, duties, and taxes for products returned to HP from another country.

HP warrants that its software and firmware designated by HP for use with an instrument will execute its programming instructions when properly installed on that instrument. HP does not warrant that the operation of the instrument, or software, or firmware 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 modification or misuse, operation outside of the environmental specifications for the product, or improper site preparation or maintenance.

NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. HP 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. HP 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

Ofice.

. . .

III

Safety Symbols

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

of the symbols and its meaning before operating this instrument.

Caution

Warning

The caution sign denotes a hazard. It calls attention to a procedure which, if not correctly performed or adhered to, could result in damage to or destruction of the instrument. Do not proceed beyond a caution sign until the indicated conditions are fully understood and met.

The

warning

if not correctly performed or adhered to, could result in injury or loss of life. Do not proceed beyond a understood and met.

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

warning

General Safety Considerations

Warning

Before this instrument is switched on,

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.

sign until the indicated conditions are fully

make sure it has been properly grounded

Warning

Caution

There are many points in the instrument which can, if contacted, cause personal. injury. Be extremely careful.

Any adjustments or service procedures that require operation of the instrument with protective covers removed should be performed only by trained service personnel.

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.

HP 8560A Spectrum Analyzer Documentation Outline

For ordering information, contact a Hewlett-Packard Sales and Service Office.

Manuals Shipped with Your Instrument

HP 8560A Installation and Verification Manual

n Tells you how to install the spectrum analyzer.

n Tells you what your analyzer’s specifications are.

856OA/8561 B/8563A

Tells you how to make measurements with your spectrum analyzer.

Tells you how to program your spectrum analyzer.

perating

and Programming Manual

HP 8560A Quick Reference Guide

Is an abbreviated version of the HP

856OA/8561B/8563A

Operating and Programming

iWanua1

n Provides you with a listing of all remote programming commands.

Options

Option 915:

HP 8560A

ervice

Component Level Information

The service manual provides information to service your analyzer to the assembly-level (not

always immediately available for new products).

n The component-level information binder provides component-level information for

component-level repair of the analyzer or analyzer family (not always immediately available for new products).

Manual and HP 8560A/6lB/63A Spectrum Analyzer

Option 910: Extra Manual Set

Doubles all documentation shipped with a standard instrument.

Option 916: HP 8560A Quick Reference Guide

Adds an extra HP 8560A Quick Reference Guide to the document package.

Contents

1. General Information

Manual Organization Manual Text Conventions Serial Numbers Covered by This Manual Instrument Variations HP 85629B Test and Adjustment Module Service Kit Recommended Test Equipment Electrostatic Discharge

Reducing Potential for ESD Damage Static-Safe Accessories

Returning Instruments for Service

Service Tag Original Packaging Other Packaging

Sales and Service Offices

2. Adjustment Procedures

Introduction

Safety Considerations Which Adjustments Should Be Performed? Test Equipment Adjustable and Factory-Selected Components Adjustment Tools Instrument Service Position

Using the TAM

Test Equipment Adjustment Indicator

1. High-Voltage Power Supply Adjustment

2. Display Adjustment

3. IF

4. IF Amplitude Adjustments

5. DC Log Amplifier Adjustments

6. Sampling Oscillator Adjustment

7. YTO Adjustment

8. First LO Distribution Amplifier Adjustment

9. Tracking Generator Power Level Adjustments

10. Frequency Response Adjustment

11. Calibrator Amplitude Adjustment

12. 10 MHz Reference Adjustment (Non-Option 003 only)

13. Demodulator Adjustment

14. External Mixer Bias Adjustment

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Bandpass

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l-l l-2 l-2 l-3 l-6 l-6 1-6 l-7 l-7 1-8 1-8 l-8 l-8 1-8

1-11

2-l 2-2 2-2 2-2 2-2 2-3 2-3 2-9 2-9

2-9 2-12 2-14 2-20 2-25 2-29 2-33 2-37 2-40 2-42 2-45 2-48 2-50 2-52 2-55

Contents-l

15. External Mixer Amplitude Adjustment

16. Second IF Gain Adjustment

17. Signal ID Oscillator Adjustment

18. 600 MHz Amplitude Adjustment

19. 10 MHz Reference Adjustment (Option 003)

20. Tracking Oscillator Adjustment (Option 002)

3. Assembly Replacement

Access to Internal Assemblies Cable Color Code

Procedure 1. Analyzer Cover Procedure 2. Al Front Frame/Al8 CRT Procedure 3. Procedure 4. Procedure 5. A2, A3, A4, and A5 Assemblies Procedure 6. A6 Power Supply Assembly

Procedure 7. Procedure 8. A7 through Al3 Assemblies A7 1st LO Distribution Amplifier A8 Low Band Mixer A9 Input Attenuator A10 Tracking Generator (Option 002)

AllYTO

Al3 Second Converter Procedure 9. Al4 and Al5 Assemblies Procedure 10. Al7 CRT Driver Procedure 11. Bl Fan Procedure 12. Procedure 13. Rear Frame/Rear Dress Panel Procedure 14. W3 Line Switch Cable Procedure 15. EEROM (A2U501)

Procedure 16. A21 OCXO (Option 003)

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AlAl

Keyboard/Front Panel Keys

AlA

RPG

A6Al

High Voltage Assembly

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BTl

Battery

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2-57 2-60 2-63 2-66 2-68

2-71

3-2 3-2 3-3 3-4

3-11 3-12 3-13 3-19

3-22 3-25 3-28

3-29

3-30

3-31

3-32 3-33 3-34 3-37 3-38

3-39

3-40 3-44 3-50

3-51

4. Replaceable Parts

Ordering Information

Direct Mail-Order System

Direct Phone-Order System Parts List Format Firmware-Dependent Part Numbers

5. Major Assembly and Cable Locations

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-l

Contents-2

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4-l 4-l

4-2 4-2 4-2

6. General Troubleshooting

Introduction .............................

Assembly Level Text Block Diagrams

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Assembly Test Points

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Pad.. .............................

Test Jack

Ribbon Cables

WR PROT/WR ENA Troubleshooting to a Functional Section Using the TAM

Diagnostic Functions

TAM Requirements

Test Connectors

Revision Connectors

Inconsistent Results

Erroneous Results

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Softkey

Menus

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Blank Display ...........................

Automatic Fault Isolation

Display/Power Supply Controller Check

ADC/Interface

IF/LOG Check

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Check

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LO Control Check

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RF Check ............................

Manual Probe Troubleshooting Cal Osc. Troubleshooting Mode

Error Messages

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Viewing Multiple Messages Error Message Elimination System Analyzer Programming Errors (100 to 150)

ADC Errors (200 to 299)

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LO and RF Hardware/Firmware Failures (300 to 399)

YTO Loop Errors (300 to 301) Roller PLL Errors (302 to 316) YTO Loop Errors (317 to 318) Roller Oscillator Errors (321 to 329) YTO Loop Errors (331) 600 MHz Reference Loop (333) YTO Leveling Loop (334)

Sampling Oscillator (335) Automatic IF Errors (400 to 599) System Errors (600 to 651) Digital and Checksum Errors (700 to 799)

EEROM Checksum Errors (700 to 704)

Program ROM Check-sum Errors (705 to 710)

RAM Check Errors (711 to 719)

Microprocessor Error (717) Battery Problem (718)

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Model Number Error (719) System Errors (750 to 757)

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6-1 6-l 6-l 6-2 6-2 6-2 6-2 6-6

6-8 6-10 6-10 6-11 6-11 6-11 6-12 6-12 6-12 6-12 6-12 6-12 6-13 6-13 6-13 6-13 6-13 6-14 6-15 6-15 6-16 6-16 6-17 6-18 6-18 6-18 6-20 6-20 6-21 6-21 6-22 6-22 6-22 6-31 6-31 6-31 6-32 6-33 6-33 6-33 6-34 6-34

Contents-3

Option Module Errors (800 to 899) User-Generated Errors (902 to 904)

Block Diagram Description

RF Section .............................

A7 LODA ............................

A8 Low Band Mixer ........................

A9 Input Attenuator All YTO Al3 Second Converter

A15Al

Third Converter (P/O A15) Flatness Compensation Amplifiers (P/O A15)

Synthesizer Section

Sweeping the First LO Reference PLL (P/O A15) YTO PLL (A7, All, P/O A14, P/O A15) Offset Lock Loop (P/O A15) Roller Oscillator PLL (P/O A14)

IF Section .............................

A4 LOG Amplifier/Cal Oscillator assembly A5 IF Assembly

ADC/Interface

ADC ..............................

Log Expand/Video Functions (P/O A3)

Triggering ............................

Controller Section

EEROM Firmware Display ASM

Display/Power Supply Section

A6 Power Supply Al7 CRT Display Driver

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Second IF Distribution Amplifier (P/O A15)

Section

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6-34 6-34 6-35 6-36 6-36 6-36 6-36 6-36 6-37 6-37 6-37 6-37 6-37 6-37 6-38 6-38 6-38 6-39 6-39 6-40 6-40 6-41 6-42 6-42 6-42 6-42 6-43 6-43 6-43 6-43 6-43 6-43

7. ADC/Interface Section

Troubleshooting Using the TAM

Automatic Fault Isolation

Keyboard/RPG Problems

Keyboard Interface

RPG Interface Triggering Problems Flatness Control (RF Gain DACs) A3 Assembly’s Video Circuits

Log Offset/Log Expand

Video MUX

Video Filter

Video Filter Buffer Amplifier

Positive/Negative Peak Detectors

Peak Detector Reset

Rosenfell Detector

ADCMUX

Variable Gain Amplifier (VGA)

Contents-4

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7-4

7-4 7-7 7-7 7-8

7-9 7-11 7-12

14 7-15 7-15 7-16 7-17 7-18 7-18 7-19

7-21

Track and Hold

A3 Assembly’s ADC Circuits

ADC Control Signals ADC Start/Stop Control ADC ASM

ADC ...............................

Ramp Counter

A3 Assembly’s Control Circuits

Analog Bus Drivers Analog Bus Timing Interface Strobe Select

8. IF Section

Troubleshooting Using the TAM

Troubleshooting A4 Log Amplifier with the TAM Troubleshooting A5 with the TAM Troubleshooting A4 Cal Oscillator with the TAM

Automatic IF Adjustment

Parameters Adjusted Requirements

Performance Test Failures

IF Gain Uncertainty Performance Test Scale Fidelity Performance Test Resolution Bandwidths Performance Tests

A4 Assembly’s Log Amplifier Circuits

Log Amplifier Linear Amplifiers Video Offset Video Output Frequency Counter AM/FM Demodulator

4.8 kHz IF Filters

4.8 kHz and 10.7 MHz IF Filters

10.6952 MHz VCXO Input Switch LO Switch Synchronous Detector

Limiter Isolation Amplifier Detector/Mixer

Log Offset/Gain Compensation

Log Offset Compensation Log Gain Compensation

Video Mux

A5 IF Section

IF Signature Common IF Signature Problems

1 MHz Resolution Bandwidth Problems 30 kHz Resolution Bandwidth Problems 3 kHz and 10 kHz Resolution Bandwidth Problems Step Gains

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Prescaler/Conditioner

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7-21

7-22 7-22 7-23 7-24 7-24 7-25 7-26 7-26 7-27 7-28

8-3 8-4 8-4 8-8

8-9

8-10 8-11 8-12 8-12 8-13 8-13 8-14 8-14 8-15 8-16 8-16 8-17 8-17 8-17 8-18

8-19 8-19 8-19

8-20 8-20 8-20 8-20 8-21 8-21 8-21 8-21 8-22 8-23 8-28 8-30 8-32 8-32

8-33

Contents-5

A4 Assembly’s Cal Oscillator Circuit

Cal Oscillator Unlock at Beginning of IF Adjust

Inadequate CAL OSC AMPTD Range

300 Hz to 3 kHz Resolution Bandwidth Out of Specification Low-Pass Filter Sweep Generator

AM/FM Demodulation, Audio Amplifier, and Speaker

9. Controller Section

Troubleshooting Using the TAM

Blank Display ...........................

Digital Signature Analysis (DSA) Display Problems

Line Generators

Blanking

Display Jumbled or Trace Off Screen

Intensity ..............................

Bad Characters or Graticule

Long Lines Dimmer Than Short Lines Analog Zero-Span Problems Frequency-Count Marker Problems Frequency Counter State- and Trace-Storage Problems Keyboard Problems

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8-34 8-35 8-35 8-36 8-40 8-40 8-40

9-l 9-2 9-4 9-4 9-4 9-5

9-7 9-10 9-10 9-11 9-12 9-13 9-14 9-15 9-16

10. Synthesizer Section

Confirming a Faulty Synthesizer Section Troubleshooting Test Setup Troubleshooting Using the TAM General PLL Troubleshooting

PLL Locked at Wrong Frequency

Unlocked PLL

Frequency Span Accuracy Problems

Determining the First LO Span

Confirming Span Problems YTO Main Coil Span Problems (LO Spans YTO FM Coil Span Problems (LO Spans 1.01 MHz to 20 MHz) Roller Oscillator Span Problems (LO Spans 51 MHz)

First LO Span Problems (All Spans)

Unlocked YTO PLL

Operation Troubleshooting an Unlocked YTO PLL

Unlocked Roller Oscillator PLL

Operation

Confirming an Unlocked Condition

Offset Oscillator PLL Transfer Oscillator PLL Main Oscillator PLL

Unlocked Offset Lock Loop (Sampling Oscillator)

Operation Troubleshooting

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>20

MHz)

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10-2 10-7

10-8

10-13 10-13 10-13 10-15 10-15

lo-16 lo-16

10-17

lo-18

10-21

lo-23 lo-23 lo-25 lo-32 lo-32 lo-32

10-33 10-35 10-37 10-39 10-39 10-39

Contents-6

Unlocked Reference PLL

Operation Troubleshooting Third LO Driver Amplifier

Sampler and Sampler IF Sweep Generator Circuit

A21 OCXO (Option 003 only)

11. RF Section

Troubleshooting Using the TAM Low Band Problems (50 Hz to 2.9 GHz) Low Band Problems A7 LODA (LO Distribution Amplifier)

A9 Input Attenuator

Al3 Second Converter

Al4 Frequency Control Assembly ....................

A7 LODA Drive

Al5 RF Assembly

Confirming a Faulty Third Converter Confirming Third Converter Output Third Converter Flatness Compensation Control Control Latches SIG ID Oscillator 10 MHz Reference

A10 Tracking Generator (Option 002)

Block Diagram Description

Tracking Oscillator ........................

Upconverter ...........................

Pentupler ............................

Modulator ............................

Coupler .............................

Output Mixer

Output Amplifier .........................

Bias Board ............................

Output Goes Unleveled (ERR 900 or ERR 901) Excessive Residual FM Flatness Out-of-Tolerance Vernier Accuracy Out-of-Tolerance Harmonic/Spurious Outputs Too High Power Sweep Not Functioning Properly No Power Output

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lo-42 lo-42 lo-42

10-44 10-45 10-47

lo-52

11-2 11-4 11-5 11-6 11-7 11-8 11-9

11-9 11-10 11-10 11-11 11-11 11-13 11-13 11-13 11-14

11-18 11-18 11-18 11-18 11-18 11-18 11-18 11-18 11-19 11-19 11-19 11-20 11-21 11-21 1 l-22 11-23 11-23

Contents-7

12. Display/Power Supply Section

Troubleshooting Using the TAM

Blank Display

Display Distortion Focus Problems Intensity Problems A6 Power Supply Assembly

Dead Power Supply Line Fuse Blowing Supply Restarting Every 1.5 Seconds (Kick Start) Low Voltage Supplies High Voltage Supplies CRT Supply Dropping Out Blanking Signal Buck Regulator Control DC-DC Converter Control Power Up

A. Component-Level Information Packets

Index

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12-4 12-5 12-6 12-7 12-8

12-9 12-11 12-11 12-13 12-13 12-13 12-14 12-15 12-15 12-16 12-16 12-17

Contents-8

Figures

l-1. Serial Number Label Example l-2. Example of a Static-Safe Workstation

1-3. HP 8560A Shipping Container and Cushioning Materials 2-1. High-Voltage Power Supply Adjustment Setup 2-2. Display Adjustment Setup 2-3. CRT Adjust Pattern 2-4. A2 Display Adjustment Locations 2-5. IF 2-6. IF Amplitude Adjustment Setup 2-7. IF Amplitude Adjustment Locations 2-8. Sampler Adjustment Setup 2-9. Coarse-Tune Adjustment Setup

2-10. YTO Adjustment Setup 2-11. First LO Distribution Amplifier Adjustment Setup 2-12. Tracking Generator Power Level Adjustments Setup and Adjustment

2-13. Frequency Response Adjustment Setup 2-14. Calibrator Amplitude Adjustment Setup 2-15. 10 MHz Frequency Reference Adjustment Setup 2-16. Demodulator Adjustment Setup 2-17. External Mixer Bias Adjustment Setup 2-18. External Mixer Amplitude Adjustment Setup 2-19. Location of 2-20. Signal ID Oscillator Adjustment Setup 2-21. 600 MHz Amplitude Adjustment Setup 2-22. 10 MHz Reference Adjustment (Option 2-23. Tracking Oscillator Adjustment Setup

3- 1.

3-2. Discharging the Post-Accelerator Cable 3-3. A9, A18, and Line-Switch Assembly Mounting Screws 3-4. Front-Frame Mounting Screws 3-5. Installing the CRT and Front-Frame Assemblies 3-6. Placing the CRT into the Front Frame 3-7. A2, A3, A4, and A5 Assembly Removal 3-8. Assembly Cables (1 of 2) 3-8. Assembly Cables (2 of 2) 3-9. Coaxial Cable Clip

3-10. HP-IB and 3-11. A6 Power Supply Connections 3-12. Power Supply Cover 3-13. Al7 CRT Driver Mounting Screws 3-14. Assembly Locations

Bandpass

Locations

Hinged Assemblies

Adjustment Setup

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A15Al

AlAl Wl

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Cable Placement

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003)/Setup

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and Adjustment Location

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l-2 1-7

l-10 2-12 2-14 2-17 2-18 2-20 2-25 2-26 2-33 2-35 2-37 2-40

2-43

2-45 2-48 2-50

2-52

2-55 2-57

2-61 2-63

2-66

2-69

2-72

3-3 3-5 3-6 3-7 3-8

3-9 3-14 3-15 3-16 3-17 3-18 3-20 3-21 3-23 3-26

Contents-9

3-15. RF Section Bias Connections . . . . . . . . . . . . . . . . . . . . .

3-16. A9 Mounting Screws at Right Frame 3-17. A10 Tracking Generator Mounting Screws 3-18. All Mounting Screws

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3-19. Al4 and Al5 Assembly Removal 3-20. Al4 and Al5 Assembly Cables 3-21. Al7 Mounting Screws 3-22. Main Deck Screws 3-23. A6 Power-Supply Cover

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3-24. W3 Dress and Connection to A6 Power Supply 3-25. Line Switch Mounting Screw and Cable Dress 3-26. W3 Cable Connector 3-27. Side Frame Mounting Screws 3-28. A21 OCXO Mounting Screws

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4-l. Parts Identification, Assembly Mounting 4-2. Parts Identification, Cover Assembly 4-3. Parts Identification, Main Chassis 4-4. Parts Identification, RF Section

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4-5. Parts Identification, Front Frame 4-6. Parts Identification, Rear Frame

1. Hinged Assemblies

5-2. Top View (A2 Unfolded)

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5-3. Top View (A2 and A3 Unfolded) 5-4. Top View (A2, A3, A4, and A5 Unfolded) 5-5. Bottom View (Al5 Unfolded)

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5-6. Bottom View (Al5 and Al4 Unfolded) 5-7. Front End 5-8. Rear View 6-l. Assembly Test Points

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6-2. Ribbon Cable Connections (1 of 2) 6-3. WR ENA Softkey Menu 6-4. Functional Sections 6-5. Phase Lock Loops

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6-6. Simplified Block Diagram

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6-7. HP 8560A Overall Block Diagram (Sheet 1 of 3) 6-7. HP 8560A Overall Block Diagram (Sheet 2 of 3) 6-7. HP 8560A Overall Block Diagram (Sheet 3 of 3) 7-l. A3 Test Connectors

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7-2. A3 Interface Assembly Block Diagram 8-1. A4 and A5 Test Connectors

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8-2. IF Section Troubleshooting with TAM 8-3. IF Adjust Signature

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8-4. Detailed IF Adjust Signature (1) 8-5. Detailed IF Adjust Signature (2) 8-6. Detailed IF Adjust Signature (3) 8-7. Detailed IF Adjust Signature (4) 8-8. Detailed IF Adjust Signature (5) 8-9. Noisy Signature

8-10. Noise with Correct Shape 8-11. Region B Amplitude Variation 8-12. Region B Amplitude Offset

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3-27 3-30 3-31 3-32 3-34 3-36

3-37 3-41 3-43

3-45

3-46

3-47 3-49 3-51 4-21 4-33 4-35 4-37 4-39 4-41

5-4 5-4 5-5

5-6 5-7 5-8

5-9

5-10

6-3 6-4

6-7 6-35 6-39 6-45 6-47 6-49 6-51

7-4

7-29

8-3

8-7 8-25 8-25 8-26 8-26 8-27

8-27 8-28 8-29 8-29 8-30

Contents-10

8-13. Faulty Crystal Short 8-14. Faulty LC Pole

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8-15. Faulty Crystal Symmetry

........................

......................

8-16. Output Waveform, 10 kHz Resolution Bandwidth 8-17. Output Waveform, 3 kHz Resolution Bandwidth 8-18. Output Waveform, 1 kHz Resolution Bandwidth 8-19. Output Waveform, 300 Hz Resolution Bandwidth 8-20. Failed Crystal Set Symptoms 8-21. A4 Log Amplifier Block Diagram

8-22. A5 IF Assembly Block Diagram 8-23. Cal Oscillator Block Diagram

9-l. A2 Test Connectors

.........................

9-2. Line Generator Output Waveforms 9-3. Blanking Waveforms

........................

9-4. Expanded Blanking Waveforms 9-5. Switch Driver Waveform LCHAR 9-6. Distorted X/Y Line Generator Waveforms 9-7. Expanded X/Y Line Generator Waveforms 9-8. Normal X/Y Line Generator Waveforms 9-9. Delta X Waveform

9-10.

Delta Y Waveform

11.

DEFl

Synchronization

.........................

........................

9-12. A2 Controller Block Diagram 10-l. YTO Loop Test Setup

........................

10-2. Sampler and Sampling Oscillator Test Setup 10-3. Al4 and Al5 Test Connectors 10-4. PLL Locked at Wrong Frequency 10-5. Unlocked PLL

...........................

10-6. Input to YTO FM Coil Driver 10-7. Input to

Main/FM/VCO

10-8. Troubleshooting an Unlocked YTO PLL

10-9.

Simplified Sweep Generator 10-10. Simplified Sweep Generator during Retrace 10-11. Simplified Synthesizer Section 10-12. Simplified Al4 Assembly Block Diagram 10-13. Simplified Al5 Assembly Block Diagram 10-14. Frequency Control Block Diagram 10-15. RF Assembly Block Diagram

11-l. Al4 and Al5 Test Connectors 11-2. A7 LODA Drive

..........................

11-3. 10 MHz Reference at A15J302 11-4. 10 MHz TTL-Reference at

.....................

...................

....................

.....................

..................

....................

...................

...............

................

.....................

..............

....................

...................

....................

Sweep Switch

................

.....................

...............

....................

................

...................

.....................

....................

U303

Pin 5

.................

11-5. HP 8560A RF Section Troubleshooting Block Diagram 12-l. Simplified Section Block Diagram 12-2. Al7 Test Connector 12-3. Probe Power Socket 12-4. Buck Regulator Waveform

.........................

......................

12-5. A6 Power Supply Block Diagram 12-6. Al7 CRT Driver Block Diagram

A-l. Interconnect Diagram

........................

...................

............

.........

8-31 8-31 8-33 8-37 8-38 8-38 8-39 8-39 8-43 8-45 8-47

9-3 9-5 9-6

9-7 9-8 9-9

9-9 9-10 9-11 9-12 9-13 9-17

10-5

10-6

10-8

10-13 10-14

lo-18

10-19

lo-26

10-47

lo-48

10-49 10-50 10-51 10-53 10-54

11-2 11-10 11-15

11-16 11-25

12-2

12-5

12-7

12-12 12-19 12-21

A-7

Contents-l 1

Tables

l-l. Service Kit Contents l-2. Static-Safe Accessories l-3. Hewlett-Packard Sales and Service Offices

1-4. Recommended Test Equipment 2-l. Related Adjustments (1 of 2) 2-l. Related Adjustments (2 of 2) 2-2. Adjustable Components (1 of 3) 2-2. Adjustable Components (2 of 3) 2-2. Adjustable Components (3 of 3) 2-3. Factory Selected Components 2-4. TAM Adjustments 2-5. Required Test Equipment for TAM 2-6. Factory-Selected LC Filter Capacitors 2-7. LC Factory-Selected Capacitor Selection 2-8. Factory-Selected XTAL Filter Capacitors 2-9. XTAL Factory-Selected Capacitor Selection

2-10. Capacitor Part Numbers 2-11. Sampling Adjustments 2-12. Conversion Loss Data 2-13. A15U802 Values 2-14. Tracking Oscillator Range Centering

3-l. Required Tools ...........................

4-2. Reference Designations, Abbreviations and Multipliers (1 of 4) 4-2. Reference Designations, Abbreviations, and Multipliers (2 of 4) 4-2. Reference Designations, Abbreviations, and Multipliers (3 of 4) 4-2. Reference Designations, Abbreviations, and Multipliers (4 of 4) 4-3. Manufacturers Code List (1 of 3) 4-4. Replaceable Parts 6-l. Location of Assembly Troubleshooting Text 7-l. W2 Control Cable Connections (1 of 2) 7-2. Automatic Fault Isolation References 7-3. TAM Tests Versus A3 Test Connectors 7-4. Keyboard Matrix 7-5. Counter Frequencies 7-6. Trigger MUX Truth Table 7-7. A3U102 Latch Outputs 7-8.

HMUX-SELO/l

7-9. Logic Levels at A3U108 7-10. Demultiplexer A3U410 Truth Table 7-11. Demultiplexer A3U500 Truth Table

8-l. Automatic Fault Isolation References

8-2. TAM Tests Versus Test Connectors (1 of 2)

8-3. Sweep Width Settings

Versus Detector Mode

........................

...............

....................

.....................

...................

...’................

.....................

.........................

..................

.................

................

...............

..............

.......................

........................

..........................

.................

......

...................

..........................

..............

.................

................

..........................

.........................

......................

.......................

................

.......................

..................

.................

..............

........................

l-6

l-8 1-12 1-13

2-4 2-5 2-6 2-7 2-8

2-8 2-10 2-10 2-22 2-22 2-23 2-23 2-24 2-36 2-59 2-62 2-73

3-2

4-3

4-4

4-5

4-6

4-7 4-10

6-9

7-2

7-5

7-6

7-7

7-9

7-9 7-16

7-18 7-20 7-28

7-28

8-4

8-5

8-9

Contents-12

8-4. Available Reference Level Range 8-5. Signal Level for Reference Level Display 9-l. TAM Tests Versus Test Connectors

9-2. Gate Times 10-l. Center Frequency Tuning Values 10-2. Sampling Oscillator Test Frequencies 10-3. YTO Frequency in TEST Position 10-4. Automatic Fault Isolation References (1 of 2) 10-4. Automatic Fault Isolation References (2 of 2) 10-5. TAM Tests versus Test Connectors (1 of 2) 10-5. TAM Tests versus Test Connectors (2 of 2) 10-6. Sweep Signal Destination versus Span 10-7. Harmonic Mixing Number versus Center Frequency 10-8. Settings of Sweep Switches

10-9.

Settings of Sweep Switches 10-10. Settings for Switches and Comparators

lo-

11. Amplifier Polarities 10-12. YTO Frequency Errors with A14J23 on Pins 2 and 3 10-13. Voltages in FM Coil and Main Loop Drivers 10-14. Main Coil Coarse and Fine DACs Voltages 10-15. Sampling Oscillator PLL Divide Ratios

11-1. Automatic Fault Isolation References 11-2. TAM Tests versus Test Connectors 11-3. Attenuator Pin Values 11-4. RF Section Mnemonic Table 12-1. Wl Power-Cable Connections (1 of 2) 12-1. Wl Power-Cable Connections (2 of 2) 12-2. Automatic Fault Isolation References 12-3. TAM Tests versus Test Connectors

A-l. HP 8560A Spectrum Analyzer Documented Assemblies A-2. A4 and Al6 Assemblies Shipped with HP 8560As Serial Prefixed below 3207A A-3. Al5 RF Assemblies Shipped with HP 8560As Serial Prefixed below 3029A .

............................

......................

.........................

........................

...................

................

..................

...................

.................

..................

..............

...............

.................

...........

................

..........

..............

...............

................

.................

..................

.....................

.................

....,.............

.........

8-12 8-12

9-2

14 10-3 10-7

10-8

10-9

10-10 10-11 10-12 10-15 10-15 10-17 10-19 10-22

lo-25 lo-28

10-30 10-31 10-40

11-3 11-4 11-7

11-17

12-3 12-4 12-4 12-5

A-2 A-4 A-5

Contents-13

General Information

This HP 8560A Spectrum Analyzer Service Manual contains information required to adjust and service the HP 8560A Spectrum Analyzer to the assembly level.

For component-level information, refer to the HP

Component Level Information.

856OA/61B/63A

Spectrum Analyzer

Manual Organization

Chapter 1, General Information, contains information about service kit contents,

recommended test equipment, returning an instrument for service, and sales and service offices.

Chapter 2, Adjustment Procedures, contains the necessary adjustment procedures to adjust

the instrument properly after repair. Chapter 3, Assembly Replacement, contains instructions for removal and replacement of all

major assemblies. Chapter 4, Replaceable Parts, contains the information necessary to order parts or assemblies

for the instrument. Chapter 5, Major Assembly and Cable Locations, contains figures identifying all major

assemblies and cables. Chapter 6, General Troubleshooting, contains instrument-level troubleshooting information,

block diagrams, and troubleshooting information covering the instrument’s six functional areas.

Chapters 7 through 12 contain troubleshooting information covering the instrument’s six

functional areas. Appendix contains the component-level documented assemblies matrix and the HP 8560A

Interconnect Diagram.

General Information

1-l

Manual Text Conventions

The following text conventions are used throughout this manual:

Softkeys

Display

Text

Serial

This service manual applies directly to HP 8560A spectrum analyzers with serial numbers prefixed 3207A and above. For HP 8560A spectrum analyzers with serial numbers prefixed below

Hewlett-Packard makes frequent improvements to its products to enhance their performance, usability, or reliability. HP service personnel have access to complete records of design changes to each type of equipment, based on the equipment’s serial number. Whenever you contact HP about your analyzer, have the complete serial number available to ensure obtaining the most complete and accurate information possible.

3207A, order HP Part Number 08560-90038.

Boxed text in this typeface represents a mechanical key physically located on the instrument.

Shaded text indicates a

activated by pressing corresponding keys surrounding the display. The labels displayed are determined by the mechanical front-panel key depressed and the

instrument’s firmware. Text printed in this typeface indicates text appearing on the screen.

N.umbers

Covered by This Manual

softkey. Softkey labels appear on the display and can be

The serial number label is attached to the rear of the analyzer. The serial number has two

parts: the prefix (the first four numbers and a letter), and the suffix (the last five numbers).

See Figure l-l.

The first four numbers of the prefix are a code identifying the date of the last major design change incorporated in your analyzer. The letter identifies the country in which the unit was manufactured. The five-digit suffix is a sequential number and is different for each unit. Whenever you list the serial number or refer to it in obtaining information about your analyzer, be sure to use the complete number, including the full prefix and the suffix.

Figure l-l. Serial Number Label Example

l-2 General Information

Instrument Variations

The following text lists the unique assemblies contained in the HP 8560A Options 001, 002,

003, and all combinations.

HP 8560A Option 001 (Rear-Panel 2nd IF Output)

Al5 RF Assembly

w19

Rear-panel JlO

HP 8560A Option 002 (Tracking Generator)

A10 Tracking Generator Al5 RF Assembly

Front dress-panel w14 W16 W36 W42 w43

W46 w47 W48

unique part number added added

added unique part number unique part number added added

deleted deleted added added added added

Rear-panel J 11 Front-panel Front-panel J6

HP 8560A Option 012 (001 + 002)

Al5 RF Assembly unique part number

w19

Rear-panel JlO A10 Tracking Generator Front dress-panel w14 added

W16

W36 W42 deleted w43

added deleted added

added added

added unique part number

added deleted

added

General Information 1-3

W46

added

w47 W48 Rear-panel J 11 Front-panel Front-panel J6

HP 8560A Option 003 (Precision Frequency Reference)

Al5 RF Assembly

A21 OCXO w49

w50

HP 8560A Option 013 (001 + 003)

Al5 RF Assembly

w19

Rear-panel JlO

added added added deleted

added

unique part number added added added

unique part number added

added A21 OCXO w49

w50

HP 8560A Option 023 (002 + 003)

Al5 RF Assembly

A10 Tracking Generator

Front dress-panel w14 W16 W36 W42

w43 W46 w47

W48

added added added

unique part number added

unique part number

added added deleted deleted added added

added added

Rear-panel

Front-panel

1-4 General Information

Jll

added deleted

Front-panel J6

added

A21 OCXO w49 added

w50

HP 8560A Option 123 (001 + 002 + 003)

Al5 RF Assembly

w19

Rear-panel JlO A10 Tracking Generator Front dress-panel w14 W16 W36

W42 w43 W46

added

unique part number added added added

unique part number added added deleted deleted added added

w47 W48 Rear-panel Front-panel J3

Front-panel J6 A21 OCXO w49

w50

Jll

added added

added deleted added added added added

General Information l-5

HP 85629B Test and Adjustment Module

When attached to the spectrum analyzer’s rear panel, the HP 85629B Test and Adjustment

Module (TAM)

rovides diagnostic functions for the HP 8560A. Because the TAM connects directly to the analyzer’s internal data and address bus, it controls the analyzer’s hardware directly. It would be impossible to control the hardware to the same extent either from the analyzer’s front panel or over the HP-IB.

The TAM measures voltages at key points in the circuitry and flags a failure whenever the voltage falls outside the limits. The TAM locates the failure to a small functional area which can be examined manually.

Service Kit

The HP 8560A Service Kit (HP part number 08562-60021)

contains service tools required to

repair the instrument. Refer to Table l-l for a list of items in the service kit.

Table l-l. Service Kit Contents

Description

Cable Puller PC Board Prop Line Filter Assembly Line Switch Cable Extender Cable BNC to SMB (snap-on) Cable Connector Extractor Tool Kit

Quantity

1 1 1 1

1 2 1

HP Part Number

5021-6773 5021-7459 5061-9032 5062-0728 5062-0737

85680-60093

8710-1791

Recommended Test Equipment

Equipment required for operation verification, performance tests, adjustments, troubleshooting, and the Test and Adjustment Module is listed in Table l-4. Other equipment may be substituted if it meets or exceeds the critical specifications listed in the table. Refer to the HP 856OA Installation and Verification Manual for the performance tests.

1-6 General Information

Electrostatic Discharge

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-free workstation. Figure l-2 is an example of a static-safe work station using two kinds

of ESD protection:

Conductive table mat and wrist-strap combination.

n Conductive floor mat and heel-strap combination.

These methods may be used together or separately.

Bui

lding

Ground

MegOhm

Resistor

I /TV

hhirist

StroD\

5111125

Figure 1-2. Example of a Static-Safe Workstation

Reducing Potential for ESD Damage

The suggestions that follow may help reduce ESD damage that occurs during testing and servicing.

Before connecting any coaxial cable to an analyzer connector for the first time each day,

momentarily ground the center and outer connectors of the cable.

n Personnel should be grounded with a resistor-isolated wrist strap before touching the center

in of any connector and before removing any assembly from the unit.

n Be sure all instruments are properly earth-grounded to prevent build-up of static discharge.

General Information

nstrument

l-7

Static-Safe Accessories

Table 1-2. Static-Safe Accessories

HP Part

Number

9300-0797

9300-0980

9300-1383

9300-l169

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

Set includes: 3M static control mat 0.6 m x 1.2 m (2 ft x 4 ft) and 4.6 cm (15 ft) ground wire. (The wrist-strap and wrist-strap cord are not included. They must be ordered separately.)

Wrist-strap cord 1.5 m (5 ft) Wrist-strap, color black, stainless steel, without cord, has four adjustable links

and a 7 mm post-type connection.

Description

Returning Instruments for Service

Service Tag

If you are returning the instrument to Hewlett-Packard for servicing, fill in and attach a blue service tag. Service tags are supplied in the back of this chapter.

Please be as specific as possible about the nature of the problem. If you have recorded any

error messages that appeared on the screen, or have completed a performance test record, or have any other specific data on the performance of the analyzer, please send a copy of this information with the unit.

Original Packaging

Before shipping, pack the unit in the original factory packaging materials if they are available. If the original materials are unavailable, identical packaging materials may be acquired through’any Hewlett-Packard Sales and Service Office. Descriptions of the packaging materials are listed in Figure l-3.

Other Packaging Caution

Repackage the analyzer in the original packaging materials or with commercially available materials described in steps 4 and 5, below.

1. Attach a completed service tag to the instrument.

1-8 General Information

Analyzer damage can result from using packaging materials other than those specified. Never use styrene pellets in any shape as packaging materials. They do not adequately cushion the equipment or prevent it from shifting in the carton. They cause equipment damage by generating static electricity and by lodging in the analyzer fan.

2. Install the front-panel cover on the instrument.

3. Wrap the instrument in antistatic plastic to reduce the possibility of damage caused by electrostatic discharge.

4. Use the original materials or a strong shipping container that is double-walled, corrugated cardboard carton with 159 kg (350 lb)

ursting strength. The carton must be both large

enough and strong enough to accommodate the analyzer and allows at least 3 to 4 inches

on all sides of the analyzer for packing material.

5. Surround the equipment with at least 3 to 4 inches of packing material, or enough to prevent the equipment from moving in the carton. If packing foam is unavailable, the best

alternative is SD-240 Air Cap Air Cap looks like a plastic sheet covered with

from Sealed Air Corporation (Commerce, CA 90001).

l-1/4

inch air-filled bubbles. Use the pink-colored Air Cap to reduce static electricity. Wrap the equipment several times in this material to both protect the equipment and prevent it from moving in the carton.

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

7. Mark the shipping container

“FRAGILE, HANDLE WITH CARE” to assure careful

handling.

8. Retain copies of all shipping papers.

General Information

l-9

SK1126

Item

2 3

Figure 1-3. HP 8560A Shipping Container and Cushioning Materials

l-1 0 General Information

Description

9211-5636 08590-80013

08590-80014

HP Part Number

Outer Carton Pads (2)

Bottom Tray

Sales and Service Offices

Hewlett-Packard has sales and service offices around the world providing complete support for Hewlett-Packard products. To obtain servicing information, or to order replacement parts, contact the nearest Hewlett-Packard Sales and Service Office listed in Table l-3.

In any correspondence, be sure to include the pertinent information about model numbers, serial numbers, and assembly part numbers.

Note

Within the USA, a toll-free phone number is available for ordering

replacement parts. Refer to the “Ordering Information” section in Chapter 4,

“Replaceable Parts,” for the phone number and more information.

General Information l-l 1

Table 1-3. Hewlett-Packard Sales and Service Offices

US FIELD OPERATIONS EUROPEAN OPERATIONS HEADQUARTERS

HEADQUARTERS

Hewlett-Packard Company Hewlett-Packard S.A. 19320 Pruneridge Avenue

Cupertino, CA 95014, USA 1217 Meyrin

(800) 752-0900

150, Route du Nant-d’Avri1

2/Geneva

Switzerland (41 22) 780.8111

California

Hewlett-Packard Co.

France

1421 South Manhattan Ave. Hewlett-Packard France Fullerton, CA 92631 (714) 999-6700

1 Avenue Du Canada Blackburn, Victoria 3130 Zone

D’Activite

De Courtaboeuf (61 3) 895-2895

F-91947 Les Ulis Cedex Hewlett-Packard Co. 301 E. Evelyn

France

(33 1) 69 82 60 60 Mountain View, CA 94041 (415) 694-2000

Colorado

Hewlett-Packard Co. 24 Inverness Place, East Englewood, CO 80112

Germany

Hewlett-Packard

GmbH

Berner Strasse 117 Canada 6000 Frankfurt 56 West Germany (49 69) 500006-O

(303) 649-5000

Great Britain

Georgia

Hewlett-Packard Co. 2000 South Park Place Atlanta, GA 30339

(404) 955-1500

IlklOiS

Hewlett-Packard Ltd. Eskdale Road, Winnersh Triangle Kanagawa 229, Japan Wokingham, Berkshire

RGll

England (44 734) 696622

Hewlett-Packard Co. 5201 Tollview Drive Rolling Meadows, IL 60008 (708) 255-9800

New Jersey

Hewlett-Packard Co.

120 W. Century Road Paramus, NJ 07653 (201) 599-5000

Texas

Hewlett-Packard Co. 930 E. Campbell Rd. Richardson, TX 75081 (214) 231-6101

INTERCON OPERATIONS

HEADQUARTERS

Hewlett-Packard Company

3495 Deer Creek Rd. Palo Alto, California 94304-1316 (415) 857-5027

Australia

Hewlett-Packard Australia Ltd. 31-41 Joseph Street

Canada

Hewlett-Packard (Canada) Ltd.

17500 South Service Road Trans-Canada Highway Kirkland, Quebec H9J 2X8

(514) 697-4232

Japan

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

5DZ (81 427) 59-1311

China

China Hewlett-Packard, Co. 38

Bei

San Huan Xl Road Shuang Yu Shu

Hai Dian District

Beijing, China (86 1) 256-6888

Singapore

Hewlett-Packard Singapore Pte. Ltd. 1150 Depot Road Singapore 0410 (65) 273 7388

Taiwan

Hewlett-Packard Taiwan 8th Floor, H-P Building 337 Fu Hsing North Road

Taipei, Taiwan (886 2) 712-0404

1-12 General Information

Table 1-4. Recommended Test Equipment

Instrument

Synthesized

Sweeper

(two required)

Synthesizer/

Level Generator

Synthesized

Signal Generator Residual SSB Phase Noise at 10 kHz offset

Pulse/Function Frequency Range: 10 kHz to 50 MHz HP 8116A

Generator

AM/FM

Signal Generator

Microwave Frequency Range: 9 MHz to 6.9 GHz

Frequency Counter Time base Accuracy (Aging): <5 x

Universal

Counter

Oscilloscope

Spectrum Analyzer

* Part of Microwave Workstation P

Performance Tests; A = Adjustments; M = Test & Adjustment Module; T = Troubleshooting;

V = Operation Verification

Frequency Range: 10 MHz to 7 Frequency Accuracy (CW): 1 x Leveling Modes: Internal & External

Modulation Modes: AM & Pulse Power Level Range: -80 to

Frequency Range: 200 Hz to 80 MHz Frequency Accuracy: 1 x Flatness: f0.15 dB Attenuator Accuracy: <&0.09 dB Frequency Range: 5 MHz to 2.5

(320 MHz <fc <640 MHz): <-131 dBc/Hz

Pulse Width: 200 ns; Output Amplitude: 5 V peak-to-peak Functions: Pulse

TTL Sync Output

Frequency Range: 1 MHz to 200 MHz HP 8640B Frequency Modulation Mode

Modulation Oscillator Frequency: 1

FM Peak Deviation: 5 kHz

External Frequency Reference Input Modes: TI Time Interval Measurement Range: 20 ms to 75 s Frequency Measurement Range: 17 Frequency Resolution: 1 MHz at 10 MHz

External Frequency Reference Input Time base accuracy (Aging):

Bandwidth (3 Minimum Vertical Deflection Factor: <2 mV/div Frequency Range: 4 Typical Residual FM: <l Hz Pk-to-Pk in 100 ms (Fundamental Mixing)

Critical Specifications

for Equipment Substitution

GHz

10eg/day

+16 dBm

10e7/month

GHz

Triangle

kHz

lo-“/day

AFB, Frequency Count

kHz to 11 MHz

10m7/month

dB): dc to 100 MHz

kHz to 7 GHz

Recommended Use

Model

8340A*

3335A*

HP 8663A

5343A*

Option 001

5334A/B

1980A/B* A,T

8566A/B

P,A,M,V

PAT,

M,V

PAT,

M,V

p,v

PAT

General Informationl- 13

Table 1-4. Recommended Test Equipment (continued)

Instrument

Measuring

Receiver

Power Sensor

4mplifier

Digital Voltmeter Range: -15 V dc to +120 V dc

DVM Test Leads 10 dB Step Attenuation Range: 30 dB

Attenuator Frequency Range: dc to 80 MHz

1 dB Fixed Attenuation Range: 12 dB

Attenuator

’

Part of Microwave Workstation

P = Performance Tests; A = Adjustments; M = Test & Adjustment Module; T = Troubleshooting

V = Operation Verification

Compatible w/Power Sensors

dB Relative Mode

Resolution: 0.01 dB Reference Accuracy: <&1.2% Frequency Range: 50 MHz to 6.9 GHz Maximum SWR:

1.15 (2.0 to 6.5 GHz)

Frequency Range: 250 MHz to 350 MHz Power Range: 100 nW to 10

Maximum SWR: 1.15 (250 to 350 MHz) Frequency Range: 100 kHz to 2.9 GHz HP 8482A*

Maximum SWR:

1.1 (1 MHz to 2.0 GHz)

1.30 (2.0 GHz to 2.9 GHz)

Frequency Range: 2.0 to 2.9 GHz HP 11975 Minimum Output Power (Leveled)

2.0 to 8.0 GHz: $16

Output SWR (Leveled):

Accuracy: Input Impedance: 21

236

Connectors: BNC (f)

Frequency Range: dc to 80 MHz Connectors: BNC (f)

Critical Specifications

for Equipment Substitution Model

1.15 (50 to 100 MHz)

1.10 (100 MHz to 2 GHz)

1.20 (12.4 to 18 GHz)

dBm

<1.7

<fl

mV on 10 V Range

inches, alligator clips, probe tips

Recommended Use

8902A*

8485A*

HP 8484A

3456A*

HP 34118A

HP 355D

HP 355C

PAT,

M,V

PAT,

M,V

P,A

PAT,

M,V

A,T

p,v

P,V,A

1-14 General Information

Table 1-4. Recommended Test Equipment (continued)

Instrument

20 dB Fixed

Attenuator

Frequency Range: dc to 6.5 GHz Attenuation Accuracy:

Critical Specifications

for Equipment Substitution

<fl

Recommended

Model

HP 8491B

Option 020

Use

p,v

Maximum SWR: 1.2 (dc to 6.5 GHz)

10 dB Fixed

Attenuator

Frequency Range: dc to 6.5 GHz Attenuation Accuracy:

<f0.6

HP 8491B

Option 010

p,v

Maximum SWR: 1.2 (dc to 6.5 GHz)

Signature Multimeter

Reference Attenuator

Termination

Clock Frequency

>lO

MHz

Supplied with HP 8484A Frequency Range: dc to 22 GHz Impedance: Maximum SWR:

5OQ

<1.22

5005A/B

HP 11708A

909D

P,A

P,M,V

Connector: APC 3.5

Low-Pass Filter

Cutoff Frequency: 50 MHz

0955-0306

P,M,V

Rejection at 80 MHz: >50 dB

12 MHz Low-Pass-Filter Cutoff Frequency: 12 MHz

0955-0518

P g-element Tchebychev, 0.1 dB ripple Rejection at 18 MHz: >45 dB

Directional

Bridge

Frequency Range: 5 MHz to 50 MHz

Coupling: 6.0 dB (nominal)

HP 8721A

Directivity: 30 dB minimum

Power Splitter

VSWR: Frequency Range: 1 kHz to 22 GHz

<1.45

HP 11667B

P,A,M,V

Insertion Loss: 6 dB (nominal) Output Tracking:

Equivalent Output SWR: Product Support Kit No Substitute Adapter

Type N (f) to BNC (m) Adapter Type N (m) to BNC (f)

(three required)

Adapter Adapter Adapter

(two required)

Adapter

Type N (f) to BNC (f) Type N (f) to APC 3.5 (m) Type N (m) to APC 3.5 (m)

Type N (m) to APC 3.5 (f)

<0.25

<1.22

08562-60021

1250-1477 1250-1476

1250-

1474 1250-1750 A 1250-1743

P,A,M,V

1250-1744

A,T

p,v

P,A,V

P = Performance Tests; A = Adjustments; M = Test & Adjustment Module; T = Troubleshooting; V = Operation Verification

General Information 1-15

Table 1-4. Recommended Test Equipment (continued)

ment Substitution

Type N (m) to SMA (f)

Length:

Cable,

Cable, HP-IB

5052

Coaxial Connectors: BNC (m)

(five

required)

Length: 2 122 cm (48 in.) Required w/Performance Test Software

(12 required) Required w/HP 85629B Test

291

cm (36 in.)

Adjustment Module

HP 10503A

HP 10833B

P,A,V

PAM

Length: 2 m (6.6 ft.)

Cable Frequency Range: 10 kHz to 6.9 GHz

(three required) Maximum SWR:

<1.4

at 6.9 GHz

8120-4921

P,A,M,V

Maximum Insertion Loss: 2 dB Connectors: APC 3.5 (m), both ends

Length: 2 91 cm (36 in.)

Photometer/

No Substitute

JlG-TV

Tek

Radiometer

Controller

Required to run Operation Verification Software

No substitute.

HP 9816A,

9836A/C,

or HP 310

Power Supply

Tuning Tool

Output Voltage:

224

V dc

Output Voltage Accuracy:

N/A

<f0.2

HP 6114A

8710-1010

P = Performance Tests; A = Adjustments; M = Test & Adjustment Module; T = Troubleshooting V = Operation Verification

1-16 General Information

Adjustment Procedures

Introduction

This chapter contains information on automated and manual adjustment procedures for the HP 8560A spectrum analyzer. Perform the automated procedures using the HP 85629B Tests and Adjustment Module (TAM). N Adjustments should be performed after a repair or performance test failure.

Introduction

Safety Considerations

Which Adjustments Should Be Performed? ..........................................

Test Equipment

Adjustable and Factory-Selected Components ........................................

Adjustment Tools Instrument Service Position

Using the TAM

Test Equipment ....................................................................

Adjustment Indicator ..............................................................

1. High-Voltage Power Supply Adjustment .........................................

2. Display Adjustment

3. IF

4. IF Amplitude Adjustments

5. DC Log Amplifier Adjustments

6. Sampling Oscillator Adjustment ................................................

7. YTO Adjustment

8. First LO Distribution Amplifier Adjustment

9. Tracking Generator Power Level Adjustments

10. Frequency Response Adjustment

11. Calibrator Amplitude Adjustment

12. 10 MHz Reference Adjustment (Non-Option 003 only)

13. Demodulator Adjustment

14. External Mixer Bias Adjustment ..............................................

15. External Mixer Amplitude Adjustment ........................................

16. Second IF Gain Adjustment

17. Signal ID Oscillator Adjustment ...............................................

18. 600 MHz Amplitude Adjustment ..............................................

19. 10 MHz Reference Adjustment (Option 003)

20. Tracking Oscillator Adjustment

.........................................................................

..............................................................

....................................................................

..................................................................

........................................................

.......................................................................

..........................................................

Bandpass

Adjustment .......................................................

.....................................................

.............................................................

....................................................

.................................................

perform adjustments as routine maintenance.

ever

................................................

....................................

..................................

..............................................

.............................................

.........................

.................................. .2-68

...............................................

..2- 2

..2- 3

..2- 9

..2-14

.2-29

..2-3 7

.2-42

.2-45

..2-5 2

.2-55

..2-6 0

.2-71

..2-

.2-2

..2- 2

.2-2

..2- 3

.2-9

..2- 9

.2-12

2-20 2-25

2-33

.2-40

2-48

.2-50

.2-57

2-63

.2-66

Note

Before performing any adjustments, allow the instrument to warm up for 5 minutes.

Adjustment Procedures

2-l

Safety Considerations

Although this instrument has been designed in accordance with international safety standards, this manual contains information, cautions, and warnings which must be followed to ensure safe operation and to prevent damage to the instrument. Service and adjustments should be performed only by qualified service personnel.

Warning

Adjustments in this section are performed with power supplied to the instrument

and protective covers removed. There are voltages at many points in the instrument which can, if contacted, cause personal injury. Be extremely careful.

Adjustments should be performed only by trained service personnel.

Power is still applied to this instrument with the m switch in the off position. Before removing or installing any assembly or printed circuit board, remove the line-power cord.

Capacitors inside the instrument may still be charged, even if the instrument has been disconnected from its source of supply.

Use a nonmetallic adjustment tool whenever possible.

Which Adjustments Should Be Performed?

Table 2-1 lists the manual adjustments that should be performed when an assembly is repaired

or changed. It is important to perform the adjustments in the order indicated to ensure that the instrument meets its specifications.

Test Equipment

The equipment required for the manual adjustment procedures is listed in Table 1-4,

“Recommended Test Equipment

given in the table may be substituted for the preferred test equipment.

Any equipment that satisfies the critical specifications

.”

Adjustable and Factory-Selected Components

Table 2-2 lists the adjustable components by reference designation and name. For each component, the table provides a description and lists the adjustment number.

Refer to Table 2-3 for a complete list of factory-selected components used in the instrument along with their functions. schematic diagrams.

2-2 Adjustment Procedures

Factory-selected components are identified with an asterisk on the

Adjustment Tools

For adjustments requiring a nonmetallic tuning tool, use fiber tuning tool, HP part number 8170-0033. For adjustments to the IF Bandpass, use tuning tool, HP part number 8710-1010. Never try to force an adjustment control. This is especially critical when tuning variable capacitors or slug-tuned inductors.

Required service accessories, with part numbers, are listed in “Service Kit” in Chapter 1.

Instrument Service Position

Refer to Chapter 3 for information on removing the analyzer cover assembly and accessing all internal assemblies.

Adjustment Procedures 2-3

Table 2-1. Related Adjustments (1 of 2)

Assembly Changed

or Repaired

AlAl

Keyboard

AlA

RPG

A2 Controller

A3 Interface

A4 Log Amp/Cal Osc

A5 IF

A6 Power Supply

A6Al

HV Module

1ST

Distribution Amplifier

A8 Low Band Mixer

A9 Input Attenuator

A10 Tracking Generator

All YTO

Perform the Following Related Adjustments in the Order Listed

No related adjustment No related adjustment Display Adjustment If the old EEROM cannot be used in a new A2

or if an EEROM must be replaced, the following adjustments must be performed:

External Mixer Amplitude Adjustment

Frequency Response Adjustment Display Adjustment (Fast Zero Span) Frequency Response Adjustment Display Adjustment (Fast Zero Span) Demodulator Adjustment

IF Amplitude Adjustment

DC Log Amplifier Adjustment

Bandpass

Adjustment

IF Amplitude Adjustment

High Voltage Power Supply Adjustment Display Adjustment High Voltage Power Supply Adjustment Display Adjustment First LO Distribution Amplifier Adjustment Frequency Response Adjustment (or perform the Frequency

Response performance test in the

HP 8560A Installation and Verification Manual.

The adjustment must be performed if the performance test fails.)

Frequency Response Adjustment Frequency Response Adjustment (or perform the Frequency

Response performance test in the

HP 856OA Installation and Verification Manual.

The adjustment must be performed if the performance test fails.)

Tracking Generator Power Level Adjustment Frequency Response Adjustment YTO Adjustment

Frequency Response Adjustment (or perform the Frequency

Response performance test in the HP 8560A Installation and Verification Manual.

The adjustment must be performed if the performance test fails.)

kdjustment

Number

15 10

4 5

3 4

10 10

2-4 Adjustment Procedures

Table 2-1. Related Adjustments (2 of 2)

Assembly Changed

or Repaired

Al3 2nd Converter Al4 Frequency Control

Al5 RF

Al5Al

2nd IF Amplifiel

Al5A2 Sampler

Al7 CRT Driver

Perform the Following Related Adjustments in the Order Listed

Frequency Response Adjustment Display Adjustment (Fast Zero Span) YTO Adjustment

First LO Distribution Amplifier Adjustment Frequency Response Adjustment

10 MHz Reference Adjustment (TCXO) Calibrator Amplitude Adjustment External Mixer Bias Adjustment Sampling Oscillator Adjustment

Signal ID Oscillator Adjustment

External Mixer Amplitude Adjustment Frequency Response Adjustment 600 MHz Amplitude Adjustment

Second IF Gain Adjustment Sampling Oscillator Adjustment Display Adjustment

Adjustmeni

Number

2 7 8

10 12 11

6 17 15 10 18

6 2

418Vl

CRT A19 HP-IB A21 OCXO

Display Adjustment No related adjustment

10 MHz Reference Adjustment (OCXO)

Adjustment Procedures 2-5

Table 2-2. Adjustable Components (1 of 3)

Reference

Designator

A2R206 A2R209

A2R215 A2R218

A2R262

A2R263

A2R268

A2R271

A4C707 A4R445 A4R531 A4R544 A4R826

A5L300

A5L301

A5L700

A5L702

A5R343

A5T200

A5T202

Adjustment

Name

DGTL X GAIN SWEEP OFFSET

DGTL Y GAIN VIDEO OFFSET

STOP BLANK

START BLANK

VIDEO GAIN

SWEEP GAIN

FM DEMOD LIMITER PHASE LOG AMP TOS LIN FIDELITY BOW

CAL OSC AMPTD

LC CTR 1

LC CTR 2

LC CTR 3

LC CTR 4

15 DB ATT

XTAL CTR 1

XTAL CTR 2

Adjustment

Number

2 2

5 5 4

Description

Adjusts the horizontal gain in the X line generator. Adjusts the beginning of the trace to the leftmost

vertical graticule line in fast-analog, zero-span mode. Adjusts the vertical gain in the Y line generator. Adjusts the vertical position in fast-analog, zero-span to match the digital zero-span input. Adjusts the blanking at the end of a vector on the display. Adjusts the blanking at the start of a vector on the display. Adjusts the vertical gain in fast-analog, zero-span to match with the digital zero-span input. Adjusts the end of the trace to the rightmost vertical-graticule line in fast-analog,

zero-span mode. Adjusts the FM demodulation for a peak response.

Adjusts Limiter Phase for peak response Minimizes Log error near Top of Screen Minimizes Linearity Fidelity error. Sets calibration oscillator output power

(nominally -35 the IF during the AUTO IF ADJUST routines.

Adjusts center frequency of first stage of LC bandwidth filter to 10.7 MHz. Adjusts center frequency of second stage of LC bandwidth filter to 10.7 MHz. Adjusts center frequency of third stage of LC bandwidth filter to 10.7 MHz. Adjusts center frequency of fourth stage of LC bandwidth filter to 10.7 MHz. Adjusts the attenuation of the Reference 15 dB attenuator for 15 db between minimum and maximum attenuation. Adjusts center frequency of first stage of crystal bandwidth filter to 10.7 MHZ. Adjusts center frequency of second stage of crystal bandwidth filter to 10.7 MHZ.

dBm).

This power is injected into

2-6 Adjustment Procedures

Table 2-2. Adjustable Components (2 of 3)

Reference

Designatol

A5T500

A5T502

A6R410

AlOR

AlOC3

A14R42

A14R76

A14R93

A14R621

414R628

415ClOO

A15C210

A15C629

A15R237

Adjustment

Name

XTAL CTR 3

XTAL CTR 4

HV ADJ

-10 dB ADJ

3 dB ADJ

TRK

OSC CTR

5.01 GHz

FM SPAN

3.2

GHz

AMPTD

>ATE BIAS

;MPL

MATCH 1

VCO RANGE

298 MHz ADJ

SMPL PWR ADJ

Adjustmend

Number

Description

Adjusts center frequency of third stage of crystal bandwidth filter to 10.7 MHz. Adjusts center frequency of fourth stage of crystal bandwidth filter to 10.7 MHz.

Adjusts the voltage between to the voltage marked on the

Module. Offsets power level range of A10 Tracking Generator.

Adjusts gain of power level range of A10 Tracking Generator. Centers range of A10 Tracking Generator’s tracking oscillator. Adjusts the main coil tune driver current at a YTO frequency of 6.01 GHz (near the upper YTO frequency limit).

Adjusts the FM span accuracy by affecting the sensitivity of the FM coil driver. Adjusts the main coil fixed driver current at a YTO frequency of 3.2 GHz (near the lower YTO frequency limit). Adjusts the amplitude of the first LO by changing the reference voltage for the leveling loop.

Adjusts the gate bias for the A7 LO Distribution Amplifier. Transforms the sampler input impedance to 50 ohms

3ver

the 280 to 298 MHz range. Adjusts the VCO tank capacitance so that 21 V on the VCO tune line equals 298 MHz VCO frequency. Fine adjusts the 298 MHz SIG ID Oscillator

frequency to optimize its performance.

Adjusts the signal power level to the Sampler.

A6TP405

A6Al

and A6TP401

High Voltage

A15U302

A15R453

A15R726

10 MHz ADJ

PHASE DET BIAS

500

MHz

4MPLITUDE

Adjusts frequency of the temperature compensated crystal oscillator (TCXO) to 10 MHz. Adjusts bias at pin 3 of phase detector A15U408 to

Adjusts input power to ECL divide-by-two chip.

Adjustment Procedures 2-7

1.80 V.

Table 2-2. Adjustable Components (3 of 3)

Reference

Designator

A15R561

A15R926 EXT BIAS ZERO A17R4 Z GAIN A17Rll A17R21 A17R26 A17R34 A17R55 A17R57 Al7R75 A17R77 A17R90 A17R92 417R93

Adjustment Adjustment Description

Name

CAL AMPTD

CUTOFF Z FOCUS X FOCUS COARSE FOCUS X GAIN

X POSN Y GAIN Y POSN TRACE ALIGN

DDD

ASTIG

Number

2 2 2 2 2

2 2 2 2 2 2 2

Adjusts amplitude of the 300 MHz calibrator signal to -10.0

Adjusts zero bias point of external mixer bias. Adjusts maximum intensity. Adjusts intensity to turn off blanked lines. Adjusts focus for lines of different brightness. Adjusts focus at the left and right corners of the display Adjusts focus at the center of the display. Adjusts the horizontal-deflection amplifier gain. Adjusts the CRT horizontal position. Adjusts the vertical-deflection amplifier gain. Adjusts the CRT vertical position. Adjusts the display axis rotation. Adjusts focus of the center of the display. Adjusts for the spot roundness on the CRT display.

dBm.

Reference Adjustment

Designator Number

A5C204 A5C216 A5C326 A5C327

A5C505 A5C516 A5C717 A5C718 A15U802

3 3 3 3 3 3 3 3

Table 2-3. Factory Selected Components

Basis of Selection

Selected to optimize center frequency of LC tank that loads the crystal.

Selected to optimize LC pole center frequency. Selected to, optimize LC pole center frequency. Selected to optimize center frequency of LC tank that loads the crystal. Selected to optimize center frequency of LC tank that loads the crystal. Selected to optimize LC pole center frequency. Selected to optimize LC pole center frequency. Selected to set the gain of the second IF to 12 dB.

2-6 Adjustment Procedures

Using the TAM

The HP 85629B TAM can be used to perform approximately half of the HP 8560A adjustment procedures. Table 2-4 lists the TAM adjustments and their corresponding manual adjustments.

The TAM adjustments do not include procedures for choosing factory-selected components. If an adjustment cannot be made and a factory-selected component must be changed, refer to the corresponding manual adjustment.

To select an adjustment, press Position the pointer next to the desired adjustment using either the knob or step keys. Press

EXECUTE, then follow the on-screen instructions displayed.

(m)

to display the TAM Main Menu, then press ADJUST.

Test Equipment

During the TAM adjustments, instructions for setting test equipment controls are displayed, with the exclusion of the test listed below. Test equipment for this adjustment is controlled automatically.

Test 8. Low Band Flatness

Table 2-5 lists the test equipment needed to perform each TAM adjustment. Required models

must be used. Substitutions may be made for recommended models. Substitute sources must operate over the frequency ranges indicated. Recommended substitutes are listed in the Configuration Menu. If you must substitute the source with a user-defined model, the adjustments run faster using a synthesized source rather than an unsynthesized source.

Note

When connecting signals from the HP to the adjustment setup, use a high-frequency test cable with minimum attenuation to 22 GHz. HP part number 8120-4921 is recommended for its ruggedness, repeatability, and low insertion loss.

8340A/B

(or any microwave source)

Adjustment Indicator

To aid in making adjustments, the TAM displays an “Analog Voltmeter Display Box” along the left-hand side of the display. A horizontal line moves inside the box to represent the

needle of an analog voltmeter. A digital readout appears below the box. Tick marks are often

displayed on the inside edges of the box indicating the desired needle position. (The tick

marks and needle are intensified when the needle is within this acceptable region.) During

some adjustments, an arrow appears along the right edge of the box. This arrow always

indicates the highest position the needle has reached. The arrow is useful when a component must be adjusted for a peak response; if the peak is overshot, the arrow indicates where the peak was. The component can be readjusted until the needle is at the same position as the arrow.

Adjustment Procedures 2-9

Table 2-4. TAM Adjustments

TAM Adjustment

1. IF Bandpass, LC Poles

2. IF Bandpass, Crystal Poles

3. IF Amplitude

4. Limiter Phase

5. Linear Fidelity

6. Log Fidelity

7. Sampling Oscillator

8. YTO YTO Adjustment

9. LO Distribution Amp

10. Low Band Flatness

11. Calibrator Amplitude Calibrator Amplitude Adjustment

12. 10 MHz Reference Oscillator 10 MHz Reference Adjustment - TCXO

13. External Mixer Bias *

14. External Mixer Amplitude * External Mixer Amplitude Adjustment

Adjustment excluded if the HP 8560A is an Option 002.

IF IF IF Amplitude Adjustment DC Log Amplifier Adjustments, A4 Limiter Phase DC Log Amplifier Adjustments, A4 Linear Fidelity DC Log Amplifier Adjustments, A4 Log Fidelity

Sampling Oscillator Adjustment

First LO Distribution Amplifier Adjustment Frequency Response Adjustment

External Mixer Bias Adjustment

Corresponding Manual Adjustment

Bandpass Bandpass

(Option 003)

Adjustment

Number

3 3 4 5 5

5 6 7 8

10 11 19

14 15

Table 2-5. Required Test Equipment for TAM

Adjustment

1. IF

Bandoass.

2. IF Bandpass, Crystal Poles None

3. IF Amplitude Synthesizer/Level Generator HP 3335A

4. Limiter Phase

5. Linear Fidelity

LC Poles

Equipment Used Required Recommended

Model Model

None

Test Cable (SMB to BNC) Manual Probe Cable Synthesizer/Level Generator HP 3335A Test Cable BNC Synthesizer/Level Generator HP 3335A Test Cable BNC

85680-60093

HP 10503A

2-10 Adjustment Procedures

Table 2-5. Required Test Equipment for TAM (continued)

Adjustment

6. Log Fidelity

7. Sampling Oscillator

8. YTO

9. LO Distribution Amplifier Power Meter

10. Low Band Flatness

11. Calibrator Amplitude

12. 10 MHz Reference Oscillator

13. External Mixer Bias

14. External Mixer Amplitude Power Meter

Synthesizer/Level Generator HP 3335A Test Cable BNC

Manual Probe Cable

Frequency Counter (3 to 6.8 GHz)

Power Sensor

(3 to 6.8 GHz, 10 to 20

Source (10 MHz to 2.9 GHz)

Power Meter

Power Sensor

(10 MHz to 2.9 GHz)

Power Splitter

(10 MHz to 2.9 GHz)

Power Meter

Power Sensor

Frequency Counter

(9 to 11 MHz)

Manual Probe Cable

Power Sensor

(310.7 MHz,

Source (310.7 MHz, -30

Equipment Used Required

-25 to -35

dBm)

Model

HP 8482A,

8481A

Recommended

Model

HP 10503A

HP 5342A, HP 5343A HP 8902A, HP 436A, HP 438A

HP 8485A

8340A/B

HP 8902A, HP 436A,

HP438A

HP 8482A, HP

HP 11667B

HP 8902A, HP 436A, HP 438A

HP 5342A, HP 5343A

HP 8902A, HP 436A, HP 438A HP 8484A

8340A/B

8481A

Adjustment Procedures 2-11

1. High-Voltage Power Supply Adjustment

Assembly Adjusted

A6 Power Supply

Related Performance Test

There is no related performance test for this adjustment.

Description

The high-voltage power supply is adjusted to the voltage marked on the The

A6Al

HV Module is characterized in the factory to ensure that the display filament voltage is set to 6.0 V rms when the on the HV Module.

Warning

Note

To minimize shock hazard, use a nonmetallic adjustment tool when adjusting the A6 Power Supply.

The following procedure probes voltages that, if contacted, could cause personal injury or death.

Adjustment of the high-voltage power supply should not be a routine maintenance procedure. Any adjustments should be done only if the A6 Power Supply,

You must perform the display adjustments after this adjustment if either the display or HV Module has been replaced.

A6Al

HV Module, or Al8 CRT (display) is repaired or replaced.

+llO

Vdc (

nominal) supply is set to the voltage marked

A6Al

HV Module.

DIGITAL VOLTMETER

Figure 2-1. High-Voltage Power Supply Adjustment Setup

2-12 Adjustment Procedures

SK11

1. High-Voltage Power Supply Adjustment

Equipment

Digital Multimeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3456A

DVM Test Leads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 34118A

Procedure Warning

1. Set the HP 8560A (LINE) switch off, disconnect the power cord, and remove the analyzer cover. Fold down the A2 Controller, A3 Interface, A4 Log Amplifier, and A5 IF assemblies. Remove the A6 Power Supply cover.

2. Position the HP 8560A as shown in Figure 2-l. Connect the positive DVM lead to

A6TP405

3. Set the HP 3456A controls as follows:

FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DCVOLTS

RANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4. Reconnect the power cord to the HP 8560A and set the

5. Record the voltage marked on the

6. Adjust A6R410 HV ADJ for a voltage equal to the voltage recorded in step 5.

7. Set the HP 8560A (LINE) switch off and disconnect the power cord. Wait at least 30 seconds

for the high-voltage power supply capacitors to discharge.

After disconnecting the ac power cord, allow capacitors in the high-voltage supply to discharge for at least 30 seconds before removing the protective cover from the A6 Power Supply.

and the negative DVM lead to

A6Al

A6TP401.

1OOOVOLTS

switch on.

HV Module.

Voltage marked on A6Al HV Module =

Vdc

8. Disconnect the DVM test leads from A6TP401 and cover.

A6TP405.

Reinstall the power supply

Adjustment Procedures2- 13

2. Display Adjustment

Assembly Adjusted

A2 Controller Al7 CRT Driver

Related Performance Test

Sweep Time Accuracy (Sweep Times

<30

ms)

Description

Coarse adjustment of the deflection amplifiers, Z-axis amplifiers, and line generators is done using the CRT adjust pattern. amplitude adjustments correct for differences between analog and digital display modes. The displayed sweep time accuracy is adjusted in the fast zero-span sweep adjustments.

Fine adjustments use the graticule. The fast zero-span

SPECTRUM ANALYZER

BNC CABLE

SK12

Figure 2-2. Display Adjustment Setup

Equipment

10 dB VHF Step Attenuator Photometer/Radiometer

.......................................

Adapters

Type N (m) to BNC (f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1250-1476

Cables

BNC, 122 cm (2 required)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A

2-14 Adjustment Procedures

HP 355D

TEK

JlG-TV

Procedure

2. Display Adjustment

1. Set the analyzer’s

switch off. Remove the analyzer’s cover and fold out the A2 Controller and A3 Interface assemblies as illustrated in Figure 2-2. Connect the CAL OUTPUT to the INPUT. Adjustment locations are shown on the CRT neck for Al7

adjustments and in Figure 2-4 for the A2 adjustments.

Preliminary Adjustments

2. Set A17R55 X GAIN, A17R75 Y GAIN, A17R92 DDD, A17R93 ASTIG, A2R206 DGTL X GAIN, A2R215 DGTL Y GAIN, A2R262 STOP BLANK, and A2R263 START BLANK to midrange. Also set the rear-panel X POSN, Y POSN, and TRACE ALIGN to midrange.

3. Set A17R21 Z FOCUS, A17R26 X FOCUS, and

A17Rll

CUTOFF fully counterclockwise.

4. Set A17R4 Z GAIN fully clockwise.

5. Turn the analyzer on and allow it to warm up for at least 3 minutes. Adjust

A17Rll

CUTOFF until the display is visible and A17R34 COARSE FOCUS for best possible

focus.

Cutoff Adjustment

6. Press

(=I,[-),

FOCUS

,127[=],

INTENSITY,255[jK$,

STORE FOCUS

,then

STORE INTENSITY, MORE I of 2,

GRAT OFF.

Adjust

A17Rll

CUTOFF until the line between the bottom of trace A and the annunciators at the bottom of the display just disappears.

Deflection Adjustments

Press CRAT ON, MORE 2 of 2,

of 2 , and CRT ADJ PATTERN . Fold up the A3 Interface assembly.

8. Refer to Figure 2-3 for locating the lines used for adjusting DGTL X GAIN and DGTL Y GAIN. Each of these lines is actually two lines adjusted for coincidence. The two lines will

form an “X” if they are not adjusted properly.

9. Adjust A2R206 DGTL X GAIN until the two vertical lines near the left edge of the

display appear to be one single line.

10. Adjust A2R215 DGTL Y GAIN until the two horizontal lines near the top edge of the display appear to be one single line.

11. Adjust A2R262 STOP BLANK and A2R263 START BLANK for the sharpest corners of the outer box in the test pattern. The intensity of the corners should be the same as the middle of the lines between the corners.

12. Adjust the rear-panel TRACE ALIGN until the leftmost line of the test pattern is parallel with the CRT bezel. See Figure 2-3.

13. Adjust the rear-panel X POSN and A17R55 X GAIN until the leftmost ‘Q” characters and the

softkey

labels appear just inside the left and right edges of the CRT bezel.

INTENSITY,80('),

STORE

INTENSITY,a,

Adjustment Procedures 2-15

2. Display Adjustment

14. Adjust the rear-panel Y POSN and A17R75 Y GAIN until the softkey labels align with their appropriate softkeys.

15. Press

[m).

If necessary, readjust STOP BLANK and START BLANK for the best-looking intersection of the graticule lines. center vertical and horizontal graticule lines.

This will be most noticeable along the

2-16 Adjustment Procedures

2. Display Adjustment

Intensity Adjustments

16.

Press

17.

Press (CAL), MORE 1 of 2, and CRT ADJ PATTERN. Locate the dot just below the HP

(-1

should almost completely fill the screen with the noise floor. Press

then set the REF LVL to -70 dB and the LOG dB/DIV to 1. This

(SWP).

Adjust

A17R4 Z GAIN until the intensity at the center of the screen is 15 NITS, as indicated by

the TEK

JlG-TV

Photometer/Radiometer.

logo. Adjust A17R93 ASTIG for the smallest round dot possible.

DEFLECTION ADJUSTMENTS

Adjust START BLANK and STOP BLANK for

sharp corners

Adjust DGTL X GAIN

unti

I only one

line appears

Adjust TRACE ALIGN to place this line

parallel to left

edge of CRT bezel

Adjust DGTL Y GAIN

until only one

line

appears

jRECALLl

SOFTKEY

856X

Adjust MIN

unti I dotsIn these

areas just disappear

INTEN

SOFTKEY SOFTKEY

SOFTKEY

EX I T

SK13

Figure 2-3. CRT Adjust Pattern

Adjustment Procedures 2-17

2. Display Adjustment

AZR206

DGTLY GAIN

AZR215

DGTLY GAIN START BLANK STOP BLANK

A2R263

AZR262

A2R268

VIDEO GAIN

SK14

Figure 2-4. A2 Display Adjustment Locations

18. Adjust A17R34 COURSE FOCUS and A17R92 DDD for the best focus of the characters at the center of the screen.

19. Adjust

20. Adjust A17R26 X FOCUS for best focus of the

A17R21

Z FOCUS for the best focus of the test pattern’s outside box.

“@”

characters at the corners of the test

pattern.

21. Repeat steps 17 through 20 to obtain the best overall focus quality.

2-18 Adjustment Procedures

2. Display Adjustment

Fast Zero Span Adjustments

22. Set A2R209 SWEEP OFFSET, A2R218 VIDEO OFFSET, A2R268 VIDEO GAIN and

A2R271 SWEEP GAIN to midrange. Adjustment locations are shown in Figure 2-4 for

these A2 adjustments.

23. Set the HP 355D Attenuator to provide 30 dB attenuation.

24. Press

(-1

on the analyzer, and connect the equipment as shown in Figure 2-2. Set

the HP 8560A controls as follows:

CENTERFREQ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...300 MHz

SPAN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 Hz

REF LVL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RES BW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

VIDEO BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

-4OdBm 1kHz

300Hz

Sweep time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 ms

25. Press

26. Press (SAVE), SAVE STATE, and STATE 0.

(MKR), (MKR->),

MARKER-B REF LVL again.

MARKER-> REF LVL .If the marker is not at the top graticule, press

27. Set sweeptime to 10 ms.

28. Press (SAVE), SAVE STATE, and STATE 1 .

29. Adjust A2R209 SWEEP OFFSET to place the beginning of the trace at the leftmost vertical graticule line.

30. Adjust A2R271 SWEEP GAIN to place the end of the trace at the tenth vertical graticule line (one division from the right edge of the graticule).

31. Press

[AMPLITUDE)

and press the (up) key seven times.

32. Press

33.

Set the sweep time to 50 ms. Press

34. Press

35.

Switch between STATE1 and STATE2. Adjusting A2R268 and A2R218 so that in STATE1

(SAVE],

SAVE STATE , and STATE 2.

(m),

RECALL STATE, and STATE 1 .

ISAVE),

SAVE STATE, and STATE 3 .

the trace is lined up with the top graticule and in STATE2 the trace is lined up with the

eighth graticule (from the top line). Repeat until they align to within

&0.2

divisions.

36. Adjust A2R209 and A2R271 until the start of sweep is aligned to the leftmost vertical graticule line and the stop sweep is aligned with the right most vertical graticule line.

37. Press STATE2 and STATE3. The two traces should be aligned within +/-.l divisions.

38. Press STATE0 and STATE1 . The two traces should be aligned within +/-.l divisions.

Adjustment Procedures 2-19

3. IF

Bandpass

Adjustment

Assembly Adjusted

A5 IF Assembly

Related Performance Test

Resolution Bandwidth Accuracy and Selectivity

Description

The center frequency of each IF

bandpass

filter pole is adjusted by DAC-controlled varactor

diodes and an inductor (for the LC poles) or a transformer (for the crystal poles). The inductors and transformers are for coarse tuning and the varactors are for fine tuning by the microprocessor. The inductors and transformers are adjusted such that the varactor diodes are biased near the middle of their capacitance range. The varactor diode bias is measured with the DVM.

Note

This procedure is not a routine adjustment. It should be performed only

if repairs to the A5 IF assembly are made. If the entire A5 IF assembly is

replaced, the assembly arrives pre-adjusted from the factory and requires no

further adjustment.

SPECTRUM

ANALYZER

BOARD

SK15

Figure 2-5. IF Bandpass Adjustment Setup

Equipment

Digital Voltmeter

DVM Test Leads

Special Tuning Tool

2-20 Adjustment Procedures

................................................

...............................................

..............................................

HP 3456A

HP 34118A

8710-1010

Procedure

3. IF

Bandpass

Adjustment

1. Set the HP 8560A cover and fold down the A2 Controller, A3 Interface, A4 Log Amp, and A5 IF assemblies.

Reconnect the power cord and set the (LINE) switch on.

at least 30 minutes.

2. Connect the negative DVM lead to pin 6 of A5J6. See Figure 2-5. Set the HP 3456A controls as follows:

FUNCTION

RANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..lOV

3. On the HP 8560A press (PRESET) (SPAN) 2

4. On the HP 8560A, press ADJ to disappear before continuing with the next step.

5. Read the voltage on

less than

t6.26

6. Repeat steps 4 and 5 until the voltage reads

+6.06

Vdc, turn LC CTR 1 counterclockwise.

switch off and disconnect the power cord. Remove the analyzer

Allow the analyzer to warm up for

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DC VOLTS

INIHz) LCAL)

LC Bandpass Adjustments

CURR

IF STATE. Wait for the IF ADJUST STATUS message

A5TP5

Vdc, turn A5L300 LC CTR 1 clockwise. If the voltage is greater than

is is an empty-hole type of test point). If the voltage is

(th

t6.16

and IF ADJ OFF.

Vdc

flO0

mV.

Note

Caution

7. Move the positive DVM lead to

8. Adjust

9. Move the positive DVM test lead to

10. Adjust A5L700 LC CTR 3 by repeating steps 4 through 6.

11. Move the positive DVM test lead to

12. Adjust A5L702 LC CTR 4 using the procedure in steps 4 through 6.

If the range for the LC CTR adjustment is insufficient, replace the appropriate factory-selected capacitor as listed in Table 2-6. To determine the correct replacement value, center the LC CTR adjustment and press

ADJ CURR IF STATE. After the IF ADJUST STATUS message disappears, read

the DVM display. Choose a capacitor value from Table 2-7, based on the

DVM reading and the presently loaded capacitor value. Table 2-10 lists a few

capacitor part numbers.

Set the HP 8560A

A5L301

LC CTR 2 by repeating steps 4 through 6.

switch off before removing or replacing any shield.

A5TP6.

A5TPl

A5TP2

(this is a resistor-lead type of test point).

Adjustment Procedures 2-21

3. IF

Bandpass

Adjustment

CC CTR Adjustment Fixed Factory Select Capacitor

Table 2-6. Factory-Selected LC Filter Capacitors

A5L300 LC CTR 1 A5L301 LC CTR 2 A5L700 LC CTR 3 A5L702 LC CTR 4

A5C326 A5C327 A5C717 A5C718

Table 2-7. LC Factory-Selected Capacitor Selection

DVM Reading (V)

Replace

6.8 with:

0 to 1.5

1.5 to 2.5

2.5 to 3.5

3.5 to 4.5

4.5 to 5.5

5.5 to 6.5

6.5 to 7.5

7.5 to 8.5

8.5 to 9.5

9.5 to 10

* Indicates a condition that should not exist; suspect broken hardware.

18 15 10

8.2 no change no change

* * *

Currentl!

Replace

8.2 with: *

18 15 12 10

no change no change

6.8 *

Loaded

Replace

no change no change no change no change

CaDacitor

Replace

with:

* *

18 18 15 12

8.2

6.8

6.8 8.2

with:

* *

15 15

8.2

Value (pF)

Replace

no change

with:

* *

18 18

12 12

Replace

18 with:

* * * * *

no change no change

15 15

XTAL Bandpass Adjustments

13. On the HP

14. Move the positive DVM test lead to

15. On the HP 8560A, press ADJ CURR IF STATE. Wait for the IF ADJUST STATUS message

856OA,

press

@ii)

and

A5TP7.

ICAL).

to disappear before continuing to the next step.

16. Read the voltage displayed on the DVM. If the voltage is less than

A5T200

CTR 1 counterclockwise.

17. Repeat steps 15 and 16 until the voltage reads

XTAL CTR 1 clockwise. If the voltage is greater than

t6.16

Vdc

flO0 mV.

t6.06

Vdc, turn

t6.26

Vdc, turn XTAL

2-22 Adjustment Procedures

3. IF

Bandpass

Adjustment

Note

If the range for the XTAL CTR adjustment is insufficient, replace the appropriate factory-selected capacitor as listed in Table 2-8. To determine the correct replacement value, center the XTAL CTR adjustment, and press

ADJ CURR IF STATE. After the IF ADJUST STATUS message

the DVM display. Choose a capacitor value from Table 2-9, based on the DVM reading and the presently loaded capacitor value. Table 2-10 lists a few capacitor part numbers.

Caution

18. Move the positive DVM test lead to

Set the HP 8560A luNE) switch off before removing or replacing any shield.

A5TP8.

19. Adjust A5T202 XTAL CTR 2 using the procedure in steps 15 through 17.

20. Move the positive DVM test lead to

A5TP3.

21. Adjust A5T500 XTAL CTR 3 using the procedure in steps 15 through 17.

22. Move the positive DVM test lead to

A5TP4.

23. Adjust A5T502 XTAL CTR 4 using the procedure in steps 15 through 17.

Table 2-8. Factory-Selected XTAL Filter Capacitors

disappears,read

XTAL CTR Adjustment Fixed Factory Select Capacitor

A5T200 XTAL CTR 1

A5T202 XTAL CTR 2 A5T500 XTAL CTR 3 A5C505 A5T502 XTAL CTR 4 A5C516

A5C204

A5C216

Table 2-9. XTAL Factory-Selected Capacitor Selection

DVM Reading (V)

Replace

with:

0 to 1.5

1.5to2.5

2.5

3.5

3.5to4.5

4.5to5.5

5.5 to 6.5 no change no change no change no change no change no change

6.5 to 7.5 no change no change no change no change no change no change

7.5

8.5

9.5

9.5to10

* * *

27 22 18 18

Currently Loaded Capacitor Value (pF)

Replace Replace Replace

with:

Replace Replace

* * *

* * 27 27 22 24 20 22

15 15

18 15

* * * 27 27 24 27

18 18

with:

* *

22 24 20 24 20 24

* Indicates a condition that should not exist; suspect broken hardware.

with:

Adjustment Procedures 2-23

3. IF

Bandpass

Adjustment

Table 2-10. Capacitor Part Numbers

Capacitor Value (pF) HP Part Number

6.8

8.2 10

12 15 18 20 22

0160-4793 0160-4792 0160-4791 0160-4790 0160-4789 0160-4788 0160-5699 0160-4787 0160-5903 0160-4786

2-24 Adjustment Procedures

4. IF Amplitude Adjustments

The IF Amplitude Adjustments consist of the Cal Oscillator Amplitude adjustment and the Reference 15 dB Attenuator adjustment.

Assembly Adjusted

A4 Log Amp/Cal Oscillator A5 IF Assembly

Related Performance Tests

IF Gain Uncertainty Test Scale Fidelity Test

Equipment

Frequency Synthesizer

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3335A

Adapters

Type N (m) to BNC (f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1250-1476

Cables

BNC,122cm

Test Cable

(48in)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...85680-60093

FREQUENCY

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A

_--------------------,

I I I

I I

TEST CABLE

SPECTRUM ANALYZER

Figure 2-6. IF Amplitude Adjustment Setup

Adjustment Procedures 2-25

4. IF Amplitude Adjustments

J4’

A5 IF

R445

JIO

(REVISION

CONNECTOR)

Jll

R531'

A4 LOG AMP

Figure 2-7. IF Amplitude Adjustment Locations

A4 Log Amp/Cal Oscillator Amplitude Adjustment

J7 R826

J2 38

R544

SK190

This adjustment sets the output amplitude of the A4 Log Amp/Cal Oscillator and the absolute amplitude of the reference 15 dB attenuator.

The output of the A4 Log Amp/Cal Oscillator is adjusted so that a -55 applied to the 10.7 MHz IF input on the A5 IF assembly

of -60

dBm.

The effect of this adjustment is visible only after the ADJ CURR IF STATE

(A5J3)

causes a displayed signal

dBm

signal

sequence is complete. ADJ CURR IF STATE causes the IF gain adjustment to use the “new” output amplitude from the A4 Log Amp/Cal Oscillator. When the adjustment sequence

is complete, the result of the adjustment should cause the -35

displayed at -60

dBm.

dBm

signal at A5J5 to be

This procedure also sets the attenuator of the reference 15 dB attenuator so that a source amplitude change of 50 dB combined with a spectrum analyzer reference level change of 50 dB

displays an amplitude difference of 50 dB.

Note

The 15 dB Reference Attenuator adjustment is preset at the factory and need

not be done if the entire A5 IF assembly is replaced.

2-26 Adjustment Procedures

Procedure

4. IF Amplitude Adjustments

1. Set the HP 8560A in the service position as illustrated in Figure 2-6. See Figure 2-7 for adjustment location.

2. Disconnect W29, violet coax cable, from the 50 R output of the HP 3335A. Set the HP 8560A (LINE) switch on.

3. Set the HP 8560A controls as follows:

CENTERFREQ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SPAN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200kHz

REF LVL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ATTEN dB/DIV

RES BW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300kHz

VIDEO BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4. On the HP 8560A, press

5. Set the HP 3335A controls as follows:

FREQUENCY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

AMPLITUDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55dBm

6. Note the marker value. Ideally it should read -60

7. If the marker reads below -60.1

clockwise for every 0.1 dB below -60

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..ldB/DIV

switch to off. Remove the analyzer cover and place the analyzer

A5J3. Connect the test cable between A5J3 and

..10.7MHz

-6OdBm

100Hz

INIKR) LCAL)

and IF ADJ OFF.

10.7MHz

dBm

+/-.l dB.

dBm,

rotate A4R826 CAL OSC AMPTD one-third turn

dBm.

See Figure 2-7 for the location of A4R826.

OdB

8. If the marker reads above -59.9 counter clockwise for every 0.1 dB above -60 will not be seen at this point.

Note

9. Press

adjustments, the displayed amplitude and marker reading should change.

10. Repeat steps 7 and 8 until the marker reads -60

11. Disconnect the test cable from A5J3 and reconnect W29 to

If A4R826 has inadequate range, refer to “Inadequate CAL OSC AMPTD Range” in Chapter 9.

AD3

CURR IF STATE . After allowing the analyzer time to complete the

dBm,

rotate A4R826 CAL OSC AMPTD one-third turn

dBm.

A change in the displayed amplitude

dBm

+/-.l dB.

A5J3.

Adjustment Procedures 2-27

4. IF Amplitude Adjustments

A5 Reference Attenuator Adjustment

12. Set the HP 3335A (AMPLITUDE) to -60

dBm.

13. Connect a BNC cable between the 50 R output of the HP 3335A and the HP 8560A

INPUT

14. On the HP

500. 856OA,

press (CAL) and REF LEVEL ADJUST. Use the front-panel knob or step

keys to place the peak of the displayed signal 3 dB to 5 dB below the reference level.

15.

On the HP 8560A press [PEAK SEARCH] and MARKER DELTA. Set the analyzer reference

level to -10

16. Change the HP 3335A

17. On the HP 8560A press

dBm.

(AMPLITUDE)

to -10

ICAL).

dBm.

18. Note the AMKR amplitude. Ideally, it should read 50.00 dB +/-.l dB.

19. If the AMKR amplitude is less than 49.9 dB, rotate A5R343 (15 dB

ATTEN)

one-half turn counterclockwise for each 0.1 dB below 50.00 dB. If the AMKR amplitude is greater than 50.1

dB,

rotate A5R343 one-half turn clockwise for each 0.1 dB above 50.00 dB. Do

not adjust A5R343 more than five turns before continuing with the next step.

20. On the HP 8560A press ADJ

21.

Set the HP 8560A reference level to -60

CXJRR

IF STATE. Note the AMKR amplitude reading.

dBm

and press

INIKR)

and MARKERS OFF .

22. Repeat steps 12 through 21 until the AMKR amplitude reading is 50.00 dB +/-.l dB.

A5 Adjustment Verification

23. On the HP the 50 R output of the HP 3335A.

24. Set the HP 8560A reference level to -10

25. Set the HP 3335A

26.

On the HP 8560A press

27. The MARKER amplitude should read -10 this range, repeat steps 4 through 21.

28. On the HP

CENTERFREQ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SPAN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 Hz

REF LVL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RES BW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300kHz

29. Connect a BNC cable between the HP 8560A CAL OUTPUT and INPUT

30. On the HP 8560A, press

31. Use the knob or step keys to adjust the REF LEVEL CAL setting until the MKR reads

-10.00

856OA,

disconnect W29 from A5J3. Connect the test cable between A5J3 and

[n)

LMKR)

and MARKER NORMAL.

8560A, reconnect W29 to

[E)

dBm

+/-.l dB.

dBm.

to -5

dBm.

A5J3.

dBm

+/-.13 dB. If the reading is outside of

Press

(PRESET)

(CAL) and REF LVL ADJ .

and set the controls as follows:

..300MHz

-1OdBm

500.

32. On the HP 8560A, press STORE REF LVL .

2-28 Adjustment Procedures

5. DC Log Amplifier Adjustments

There are three DC Log adjustments; Limiter Phase, Linear Fidelity, and Log Fidelity. These adjustment need only be done under the following conditions: Limiter Phase Only if a repair is made to blocks F, G, H, I, or J. Linear Fidelity

Log Fidelity Only if a repair is made to blocks D, F, H, K, IF Gain Accuracy, RBW

If multiple adjustments are required they should be done in the following order:

1. Limiter Phase

2. Linear Fidelity

3. Log Fidelity All adjustments should be made with all of the shields on and only after allowing at least a

20-minute warm up.

Only if a repair is made to blocks C, D, F, G, H, I, J, K, 0, IF Gain Accuracy, RBW switching, or Log Fidelity.

switching, or Log Fidelity.

Assembly Adjusted

A4 Log Amplifier

Related Performance Tests

IF Gain Uncertainty Test Scale Fidelity Test

Equipment

Frequency Synthesizer

Adapters

Type N (m) to BNC (f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1250-1476

Cables

BNC,122 cm(48in)

Test Cable

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...85680-60093

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3335A

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A

A4 Limiter Phase Adjustment

This adjustment consists of adjusting A4R445 for maximum on screen amplitude under the following conditions.

Adjustment Procedures 2-29

5. DC Log Amplifier Adjustments

Procedure

1. Set the HP 8560A the service position as illustrated in Figure 2-6. See Figure 2-7 for adjustment location.

2. Connect the HP 3335 50 0 output to the HP 8560A 50 0 input. Set the HP 8560A (LINE) switch on.

3. Set the HP 8560A controls as follows

CENTERFREQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...15 MHz

SPAN

REF LVL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

dB/DIV RES BW

IF Adjust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . off

4. Set up an HP 3335A as follows:

FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...15 MHz

AMPLITUDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -18dBm

5. Press

6. Adjust A4R445 for maximum on-screen amplitude. Refer to Figure 2-7 for the location of

A4R445.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..O

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..ldB/DIV

ICAL),

ADJ CURR IF STATE , wait for the analyzer to complete adjustments then press

switch to off. Remove the analyzer cover and place the analyzer in

-1OdBm

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300kHz

A4 Linear Fidelity Adjustment

This adjustment consists of adjusting A4R544 until the delta marker reads -40 dB under the following conditions.

Procedure

1. Set the HP 8560A (LINE) switch to off. Remove the analyzer cover and place the analyzer in the service position as illustrated in Figure 2-6. See Figure 2-7 for adjustment location.

2. Connect the HP 3335 50 R output to the HP 8560A 50 R input. Set the HP 8560A switch on.

Press(PRESET)(AMPLITUDE),

IF ADJ OFF.

4. Set the HP 8560A controls as follows: CENTERFREQ

SPAN RES BW

REF LVL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5. Set up an HP 3335A as follows: FREQUENCY

AMPLITUDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -18dBm

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...5 MHz

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300kHz

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...15 MHz

LINEAR, MORE 1 of 3, AMPD UNITS,dBm,(CAL),

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...15 MHz

-1OdBm

6. Press [PEAK SEARCH), MARKER DELTA .

2-30 Adjustment Procedures

5. DC Log Amplifier Adjustments

7. Reduce the input power by 40

dB,

to -58

dBm

use an attenuator or a source with a

(

good relative amplitude accuracy).

8. If the signal is lower on the screen than expected (delta marker reads a change of greater than 40 dB, such as

and press

LCAL),

ADJ CURR IF STATE .

-4ldB)

then adjust A4R544 (

Allow sufficient time for the analyzer to complete

see Figure 2-7) for an even lower level

the adjustment.

9. If the signal is higher on the screen than expected (delta marker reads a change of less than 40

press

dB,

such as reads -39

LCAL),

ADJ CURR IF STATE . Allow sufficient time for the analyzer to complete the

dB)

then adjust A4R544 for an even higher level signal and

adjustment.

10. Repeat the adjustment and adjust current state until the delta marker reads -40 dB

dB.

Adjustment Procedures 2-31

5. DC Log Amplifier Adjustments

A4 LOG Fidelity Adjustment

This adjustment consists of adjusting A4R531 until the error is adjusted to zero.

Procedure

1. Set the HP 8560A (LINE) switch to off. Remove the analyzer cover and place the analyzer in the service position as illustrated in Figure 2-6. See Figure 2-7 for adjustment location.

2. Connect the HP 3335 50 R output to the HP 8560A 50 R input. Set the HP 8560A (LINE) switch on.

3. Press

4. Set the HP 8560A controls as follows:

5. Set up an HP 3335A as follows:

6. Press

8. Set the source power to -10

9. Adjust A4R531 (

10. Repeat to check. Readjust as necessary to get error adjusted to zero.

[m),

CENTERFREQ SPAN RES BW

REF LVL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

FREQUENCY

AMPLITUDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(MKR),

Calcuate

ADJ CURR IF STATE.

ICAL),

IF ADJ OFF, ADJ CURR IF STATE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .O

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 kHz

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

MARKER DELTA and decrease the source power to -26

the error. The error = Delta Marker reading + 16 ( in

dBm.

see Figure 2-7) to read two times the error, press

dB).

LCAL),

..15MHz

-1OdBm

..15MHz

-1OdBm

dBm.

2-32 Adjustment Procedures

6. Sampling Oscillator Adjustment

Assembly Adjusted

Al5 RF Assembly

Related Performance Test

There is no related performance test for this adjustment procedure.

Description

The phase detector bias is adjusted for 1.8 Vdc. The sampling oscillator tank circuit is adjusted for a tuning voltage of 0.9 Vdc when the oscillator is set to 288 MHz. The voltage monitored is actually the tuning voltage divided by 4.05. A coarse-tune procedure is also included, but should only be necessary when the coaxial resonator is replaced. The power and match of the sampling oscillator signal to the A15A2 Sampler are also adjusted.

SPECTRUM ANALYZER

DIGITAL VOLTMETER

Figure 2-8. Sampler Adjustment Setup

Equipment

An asterisk (*) indicates equipment used only for the coarse-tune procedure.

Digital Voltmeter DVM Test Leads Frequency Counter* Active Probe* Power Supply*

1 MR Resistor*

Adapters

Type BNC (f) to BNC

................................................

...............................................

.............................................

..................................................

(f)’

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1250-0059

w PC

BOARD PROP

HP 3456A

HP 34118A

HP 5343A HP

1121A

HP 6114A

0757-0080

SK17

Cables

BNC,122cm(48in)*

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A

Adjustment Procedures 2-33

6. Sampling Oscillator Adjustment

Procedure

1. Set the HP 8560A analyzer cover and fold down the Al5 RF and Al4 Frequency Control assemblies. Prop up the Al4 Frequency Control assembly. Reconnect the line power cord and set the (LINE) switch on. Connect the equipment as illustrated in Figure 2-8.

2. Press

3. Set the HP 3456A controls as follows:

4. Connect the negative DVM lead to A15J200 pin 6, and the positive lead to A15J200 pin

5. Adjust A15R453 PHASE DET BIAS for a DVM reading of

(PRESET]

CENTER FREQ

CF STEP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...30 MHz

SPAN

FUNCTION

RANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..lOV.MANUAL

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 Hz

switch to off and disconnect the line power cord. Remove the

on the HP 8560A and set the controls as follows:

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .661 MHz

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DCVOLTS

Phase Detector Bias Adjustment

+1.8

f0.02 Vdc.

Sampling Oscillator Fine-Tune Adjustment

6. Connect the positive DVM lead to A15J200 pin 13. Leave the negative DVM lead connected to A15J200 pin 6.

7. Adjust A15C210 VCO RANGE for a DVM reading of

Note

8. Connect the negative DVM test lead to A15J400 pin 6, and the positive DVM test lead to

A15J400 pin 1.

9. Press

sampling oscillator to 288 MHz.

10. Adjust

Note

If A15C210 cannot be adjusted for 5.18 Vdc, perform the coarse-tune adjustment located at the end of this procedure.

Power and Sampler Match Adjustments

(-1

A15ClOO

and set the HP 8560A center frequency to 511 MHz. This sets the

SMPL MATCH 1 to peak the voltage displayed on the DVM.

If a peak cannot be obtained, the sampling oscillator power might be too low. Adjust A15R237 SMPL PWR ADJ clockwise one-eighth turn and repeat step

10. If necessary, continue increasing the oscillator power, but do not allow the

displayed voltage to exceed +3 Vdc when peaked.

t5.18 &to.05

Vdc.

11. Adjust A15R237 SMPL PWR ADJ to set the displayed voltage to

2-34 Adjustment Procedures

to.9

f0.2 Vdc.

6. Sampling Oscillator Adjustment

12. Record the displayed voltage in Table 2-11 as the displayed voltage for the sampling oscillator frequency of 288 MHz.

13. Press

(m)

on the HP 8560A. Use the step keys to set the analyzer center frequency to the frequencies listed in Table 2-11. At each listed frequency, record the displayed voltage in the table.

’

14. If the difference between the maximum and minimum voltages is less than 0.50 V, and all voltage readings are between

15. Locate the center frequency at which the voltage is lowest. Use the

to.5

and

t2.5

Vdc, proceed to step 19.

II]

and

II]

keys to set

the HP 8560A to this frequency.

16. Readjust SMPL MATCH 1 to set the displayed voltage to 0.8

$0.1

Vdc.

17. Move the positive DVM test lead to A15J400 pin 3.

18. Set the HP 8560A center frequency to 511 MHz.

19. Readjust A15R237 SMPL PWR ADJ if necessary, until the voltage at A15J400 pin 3 is

-0.5 to -2.5 Vdc and the voltage at A15J400 pin 1 is -0.5 to i-2.5 Vdc.

20. Disconnect the DVM probes from A15J400.

Coarse-Tune Adjustment

Note

This adjustment should be necessary only if the coaxial resonator 2200 has been replaced or if there was insufficient range in the Sampling Oscillator

Fine-Tune Adjustment.

FREQUENCY

COUNTER

POWER

SUPPLY

A14

SPECTRUM ANALYZER

SK18

Figure 2-9. Coarse-Tune Adjustment Setup

21. Set the HP 8560A

switch off and remove the top shield over the sampling oscillator.

Connect the equipment as shown in Figure 2-9.

22. Remove any existing shorts from the exposed center-conductor of coaxial resonator 2200 to the ground plane.

Adjustment Procedures

2-35

6. Sampling Oscillator Adjustment

23. Set the HP 6114A Power Supply for a 21 Vdc output

50.2

V. Connect the positive supply

lead to X201 pin 1 and the negative supply lead to X201 pin 4.

24. Connect the active probe to TP201.

25. Set the HP 8560A [LINE] switch on and set the controls as follows: CENTERFREQ

SPAN

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 Hz

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

..661MHz

26. Set the HP 5343A Frequency Counter as follows:

SAMPLE RATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Counterclockwise

50R--MO

SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

500

10 Hz-500 MHz/500 MHz-26.5 GHz SWITCH . . . . . . . . . . . 10 Hz-500 MHz

RESOLUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 kHz

27. Starting at the end of 2200 nearest X201, short the center conductor to a hole in the

ground plane with the lead of a 1

MR resistor (HP part number 0757-0059) until the

frequency counter reads 298 MHz f4 MHz.

28. Once the proper tap has been found, solder the resistor lead to the ground plane and the

center conductor of 2200. Cut away the rest of the resistor.

29. Remove the power supply leads and the active probe.

30. Set the HP 8560A (LINE) switch off and reinstall the top shield. Set the

switch on.

31. Repeat the procedure beginning at step 2 for the remaining center frequencies listed in

Table 2-11.

Table

2-l

1. Sampling Adjustments

511

541 571 601 631

661

288

290 292 294 296 298

2-36 Adjustment Procedures

7. YTO Adjustment

Assembly Adjusted

Al4 Frequency Control Assembly

Related Performance Tests

Frequency Span Accuracy Frequency Readout Accuracy and Frequency Count Marker Accuracy

Description

The YTO main coil adjustments are made with the phase-lock loops disabled. The YTO endpoints are adjusted to bring these points within the capture range of the main loop. The YTO FM coil is adjusted to place the 300 MHz CAL OUTPUT signal at the center vertical

graticule in a 20 MHz span.

FREQUENCY

COUNTER

SPECTRUM ANALYZER

Al4 FREQ CONTRO

Al5 RF

Figure 2-10. YTO Adjustment Setup

Equipment

Microwave Frequency Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 5343A Option 001

Adapters

Type N (m) to BNC (f)

...........................................

Type N (f) to APC 3.5 (f) (Option APC 3.5 (f) to APC 3.5 (f)

........................................

Cables

BNC,122cm(48in) SMA,61cm(24in)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...8120-1578

026

only).

........................

.1250-1476 .1250-1745 .5061-5311

SK19

Adjustment Procedures 2-37

7. YTO Adjustment

Procedure

Note

This adjustment cannot be performed if the analyzer preselected external

mixer mode is selected.

YTO Main Coil Adjustments

Set the HP 8560A

switch off. Remove the analyzer cover and fold down the Al5 RF

and Al4 Frequency Control assemblies.

Disconnect the shown in Figure 2-10. Set the

Move the jumper on A14523 from the NORM position (pins 1 and 2 jumpered) to the

50R

termination from the

LuNE)

1ST

switch on.

LO OUTPUT. Connect the equipment as

TEST position (pins 2 and 3 jumpered).

On the HP 8560A, press the following keys:

(CONFIG) (AUX-)

(FREQUENCY) CENTER

ISAVE)

EXT MXR UMPR

(EXTERNAL MIXER) LOCK HARMONIC 6

ZERO SPAN

FREQ

18.8893

SAVE LOCK OFF SAVE STATE STATE 0.

(GHz) (WSWP),

IHz)

then press

Press[m)35.7493(GHz

(SAVE) SAVE STATE STATE 1 , then press

On the HP 5343A, press

(SHIFT)

7 and set the controls as follows:

(m)

RECALL STATE STATE 0.

SAMPLE RATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fully Counterclockwise

10 Hz-500

Adjust A14R93 3.2 GHz for the appropriate frequency counter reading of 3.200 GHz

MHz.

On the HP 8560A, press STATE 1.

Adjust A14R42 6.01 GHz for a frequency counter reading of 6.010 GHz fl MHz.

On the HP 8560A, press STATE 0.

Repeat steps 6 through 9 until both of these interacting adjustments meet their

10.

MHz/506

MHz-26.5 GHz SWITCH . . . . . . . . 500 MHz-26.5 GHz

tolerances.

11.

Place the jumper on A14523 in the NORM position (pins 1 and 2 jumpered).

12.

Disconnect the SMA cable from the

termination on the

1ST

LO OUTPUT.

1ST

LO OUTPUT jack and reconnect the

500

2-38 Adjustment Procedures

YTO FM Coil Adjustments

7. YTO Adjustment

13. On the HP CENTER FREQ

SPAN

856OA,

press

(PRESET)

and set the controls as follows:

. . . :. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300 MHz

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...20 MHz

14. Adjust A14R76 FM SPAN until the 300 MHz CAL OUTPUT SIGNAL is aligned with the

center vertical graticule line.

Adjustment Procedures 2-39

8. First LO Distribution Amplifier Adjustment

Assembly Adjusted

Al4 Frequency Control Assembly

Related Performance Test

First LO OUTPUT Amplitude

Description

The gate bias for the A7 LO Distribution Amplifier is adjusted to the value specified on A7. LO AMPTD is adjusted so that the LO SENSE voltage is 6 mV more negative than the value specified on the A7 LODA label.

MEASURING RECEIVER

DVM TEST LEADS

DIGITAL VOLTMETER

SPECTRUM

ANALYZER

Figure 2-11. First LO Distribution Amplifier Adjustment Setup

Equipment

Measuring Receiver .............................................. HP 8902A

DVM .......................................................... HP 3456A

Power Sensor ................................................... HP 8485A

DVMTest

Adapters

Type N (f) to APC (m) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1250-1750

Leads ................................................ HP 34118A

SKI10

Procedure

1. Set the HP 8560A (LINE) switch off and disconnect the line cord. Remove the cover and fold down the Al5 RF and Al4 Frequency Control assemblies. Reconnect the line cord.

2. Remove the

3. Connect the positive lead of the DVM probe to pin 15 of A14J18. Connect the DVM ground lead to pin 6 of A14J18. See Figure 2-11.

2-40 Adjustment Procedures

500

termination from the

1ST

LO OUTPUT.

4. Set the HP 3456A controls as follows:

8. First LO Distribution Amplifier Adjustment

FUNCTION

RANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1OV

RESOLUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..lmV

5. Turn the HP 8560A

6. Adjust A14R628 GATE BIAS for a DVM reading within 5% of the GATE BIAS voltage printed on the A7 LO Distribution Amplifier label.

7. Zero and calibrate the HP Enter the power sensor 1 GHz Cal Factor into the HP 8902A.

8. Connect the power sensor to the

9. On the HP

10. Connect the positive DVM lead to A14J18 pin 13.

11. Note the LO SENSE voltage printed on the A7 LODA label. Adjust A14R621 LO AMPTD until the DVM reads 6 mV more negative than the LO SENSE voltage printed on the A7 LODA label. For example, if the LO SENSE voltage is -170

A14R621 until the DVM reads -176 mV.

12. Check that the HP 8902A power level reads greater than

13. Disconnect the power sensor from the termination.

8560A,

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DCVOLTS

switch on.

8902A/HP

press (PRESET) (SPAN) ZERO

8485A in LOG mode (power levels read in

1ST

LO OUTPUT on the HP 8560A.

SPAN (w)

+15.2 dBm.

1ST

LO OUTPUT and reconnect the

1.0893

(GHz).

mV,

adjust

5052

dBm).

14. Disconnect the DVM leads from A14J18.

Adjustment Procedures 2-41

9. Tracking Generator Power Level Adjustments

Assembly Adjusted

A10 Tracking Generator Assembly

Related Performance Test

Absolute Amplitude and Vernier Accuracy

Description

The A10 Tracking Generator has two adjustments for setting the output power.

-10 dB ADJ sets the power level when the TRK GEN RF POWER is set to -10

AlOR

The -10 dB ADJ acts as an offset adjustment while 0 dB ADJ acts as a gain adjustment. These adjustments are set in the factory for a 10 dB difference in output power between

the -10

tracking generator, it should only be necessary to adjust -10 dB ADJ (the offset adjustment) to account for variations in cable loss from the tracking generator to the RF OUT 50 connector. This adjustment is done at a 0 that the absolute power level with a 0 little effect, if any, on the vernier accuracy.

In some cases, the power level at the -10 of tolerance. In such cases, the -10 dB ADJ is set at a TRK GEN RF POWER of -10 and the 0 dB ADJ is set at a TRK GEN RF POWER of 0 be iterated until the power level at the two settings are within the given tolerance.

0 dB ADJ sets the power level when the TRK GEN RF POWER is set to 0

dBm

and 0

dBm

TRK GEN RF POWER settings. When installing a replacement

dBm

TRK GEN RF POWER setting. This ensures

dBm

TRK GEN RF POWER setting is 0

dBm

TRK GEN RF POWER setting might be out

dBm.

These two adjustments must

AlOR

dBm

and

dBm.

with

dBm

Equipment

Measuring Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8902A

Power Sensor

Cable

Type N, 62 cm (24 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 11500B/C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8482A

Procedure

1. Set the HP 8560A LINE switch off. Remove the analyzer’s cover and place the analyzer in the service position as illustrated in Figure 2-12.

2-42 Adjustment Procedures

MEASURING RECEIVER

9. Tracking Generator Power Level Adjustments

SPECTRUM ANALYZER

POWER SENSOR

-10 db ADJ

0 db

ADJ

SJll

Figure 2-12. Tracking Generator Power Level Adjustments Setup and Adjustment Locations

Connect the Type N cable between the RF OUT

500

and RF INPUT

50R

connectors on

the HP 8560A. Press (PRESET) on the HP 8560A and set the controls as follows:

3. CENTER FREQ

SPAN

On the HP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8560A,press

(K),(AUXCTRTI),

TRACKING GENRATOR, SRC PWR ON

.300 MHz

OHz

,@,and

On the HP 8560A, press MORE 1 OF 3 , TRACKING PEAK. Wait for the “PEAKING”

message to disappear.

Zero and calibrate the measuring receiver/power sensor combination in log mode (power

levels readout in

dBm).

Enter the power sensor’s 300 MHz Cal Factor into the measuring

receiver. Disconnect the Type N cable from the RF OUT

RF OUT

5Ofl.

50R

and connect the power sensor to the

On the HP 8560A, press @,

9. Adjust

AlOR

-10 dB ADJ for a 0

and

(mSWP).

dBm

+/-.05 dB reading on the measuring receiver.

Adjustment Procedures 2-43

9. Tracking Generator Power Level Adjustments

10. Set the TRK GEN RF POWER to -10

dBm.

Note the power displayed on the measuring

receiver.

Power at -10

dBm

Setting

11. Proceed with steps 12 through 14 only if the power level noted in the previous step was outside the range of -10

12. With the TRK GEN RF POWER set to -10

-10

dBm

+/-.l dB reading on the measuring receiver.

dBm

+/-.23 dB.

dBm,

adjust

AlOR

-10 dB ADJ for a

Refer to Figure 2-12 for adjustment

location.

13. Set the TRK GEN RF POWER to 0

f0.2

dB reading on the measuring receiver. Refer to Figure 2-12 for adjustment location.

dBm.

Adjust

AlOR

0 dB ADJ for a 0

dBm

14. Repeat steps 12 and 13 until the output power level is within the tolerances indicated at both the -10

only with the TRK GEN RF POWER set to -10

the TRK GEN RF POWER set to 0

dBm

and 0

dBm

TRK GEN RF POWER settings. Adjust -10 dB ADJ

dBm

and adjust 0 dB ADJ only with

dBm.

dBm

2-44 Adjustment Procedures

10. Frequency Response Adjustment

Assembly Adjusted

Al5 RF Assembly

Related Performance Tests

Displayed Average Noise Level Frequency Response

Description

A signal of the same known amplitude is applied to the spectrum analyzer at several different frequencies. At each frequency, the DAC controlling the flatness compensation amplifiers is adjusted to place the peak of the displayed signal at the same place on the screen. The

preselector is centered at each frequency before setting the DAC value. The DAC values are

stored in EEROM.

REF

Figure 2-13. Frequency Response Adjustment Setup

Adjustment Procedures 2-45

SJ12

10. Frequency Response Adjustment

Equipment

Synthesized Sweeper

...........................................

Measuring Receiver..............................................

Power Sensor...................................................

Power Splitter

..................................................

8340A/B

HP 8902A HP 8482A

HP 11667A

Adapters

Type N (m) to Type N (m) Type N (f) to APC 3.5 (m)

........................................

Type APC 3.5 (f) to APC 3.5 (f)

...................................

1250-1475 1250-1750

5061-5311

Cables

BNC,122cm (48in)............................................

APC

3.5,91cm(36in)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...8120-4921

HP 10503A

Procedure

1. Connect the equipment as shown in Figure 2-13. Do not connect the HP 8482A Power Sensor to the HP 11667B Power Splitter.

2. Zero and calibrate the HP out in

dBm)

and connect the power sensor through an adapter to the power splitter.

3. Place the WR PROT/WR ENA jumper on the A2 Controller assembly in the WR ENA position.

8902A/HP

8482A

combination in log mode (power levels read

4. Press

5. Press

[PRESET)

on the HP 8560A and set the controls as follows:

CENTERFREQ SPAN RES BW

dB/DIV

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OHz

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300kHz

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2dB

@NSTR

PRESET) on the HP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..lO MHz

8340A/B

and set the controls as follows:

CW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..lO MHz

POWERLEVEL

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -4

6. On the HP 8560A, press

IhnKR) ICAL)

MORE 1 OF 2 SERVICE CAL DATA, then FLATNESS.

dBm

The current value of the RF Gain DAC should be displayed in the active function area.

7. Enter the appropriate Power Sensor Calibration factor into the HP 8902A.

8. Set the HP

8340A/B

the HP 8560A display. Adjust the HP

[cw)

output to the frequency indicated in the active function area of

8340A/B

POWER LEVEL for a -10

on the HP 8902A.

9. On the HP

8560A,

until the marker reads -10

10. On the HP 8560A, press

adjust the RF Gain DAC value using the front-panel knob or keypad

dBm

+/-.10 dB.

II)

to proceed to the next frequency.

11. Repeat steps 7 through 10 for all low band frequencies.

dBm

reading

12. Press PREV MENU STORE DATA

2-46 Adjustment Procedures

,then

YES on the HP

856OA.

10. Frequency Response Adjustment

13. Place the WR PROT/WR ENA jumper on the A2 Controller assembly in the WR PROT position.

Adjustment Procedures 2-47

11. Calibrator Amplitude Adjustment

Assembly Adjusted

Al5 RF Assembly

Related Performance Test

Calibrator Amplitude and Frequency Accuracy

Description

The CAL OUTPUT amplitude is adjusted for panel CAL OUTPUT connector.

10.00

dBm

measured directly at the front

MEASUR I NG

RECEIVER

SPECTRUM ANALYZER

Figure 2-14. Calibrator Amplitude Adjustment Setup

Equipment

Measuring Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8902A

Power Sensor

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8482A

Adapters

Type N (f) to BNC (m) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1250-1477

Procedure Note

The HP 8560A should be allowed to warm up for at least 30 minutes before performing this adjustment.

PC BOARD

PROP

SK113

1. Place the HP 8560A in the service position shown in Figure 2-14. Prop the Al4 Frequency

Control Board assembly in the service position.

2. Zero and calibrate the HP

8902A/HP

8482A combination in log display mode. Enter the

power sensor 300 MHz Cal Factor into the HP 8902A.

2-48 Adjustment Procedures

11. Calibrator Amplitude Adjustment

3. Connect the HP 8482A through an adapter directly to the HP 8560A CAL OUTPUT connector.

4. Adjust A15R561 CAL AMPTD for a -10.00

dBm

reading on the HP 8902A display.

Adjustment Procedures 2-49

12. 10 MHz Reference Adjustment (Non-Option 003 only)

Assembly Adjusted

Al5 RF Assembly

Related Performance Test

10 MHz Reference Output Accuracy

Description

The frequency counter is connected to the CAL OUTPUT, which is locked to the 10 MHz reference. This yields better effective resolution. The temperature-compensated crystal oscillator (TCXO)

is adjusted for a frequency of 300 MHz as read by the frequency counter.

FREQUENCY COUNTER

Figure 2-15. 10 MHz Frequency Reference Adjustment Setup

Equipment

Microwave Frequency Counter

Cables

BNC,122cm

(48in)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A

Procedure Note

Allow the HP 8560A to warm up for at least 30 minutes before performing this adjustment.

PC BOARD PROP

. . . . . . . . . . . . . . . . . . . . . . . . . . HP 5343A Option 001

SK114

1. Connect the equipment as shown in Figure 2-15. Prop up the Al4 Frequency Control Assembly.

2. Set the HP 5343A controls as follows:

SAMPLE RATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Midrange

5052-1Mfl SWITCH

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

500

10 Hz-500 MHz/500 MHz-26.5 GHz SWITCH . . . . . . . . . . . . . . . . 10 Hz-500 MHz

2-50’

Adjustment Procedures

12. 10 MHz Reference Adjustment (Non-Option 003 only)

3. Press

Note

CjCTRL),

10 MHz INT.

REAR PANEL , and ensure that the 10 MHz reference is set to

When the 10 MHz reference is set to

MHz EXT , the TCXO is not operating

and warmed up. If the reference is set to 10 MHz EXT , set the reference to

10 MHz INT and allow 30 minutes for the TCXO to warm up.

4. Remove dust cap from A15U302, TCXO. The dust cap is toward the rear of the HP 8560A.

5. Adjust 10 MHz ADJ on A15U302 for a frequency counter reading of 300.000000 MHz

f30

Hz.

6. Replace the

dustcap

on A15U302.

Adjustment Procedures 2-51

13. Demodulator Adjustment

Assembly Adjusted

A4 Log Amplifier Assembly

Related Performance Test

There is no related performance test for this adjustment procedure.

Description

A 5 kHz peak-deviation FM signal is applied to the INPUT monitored by an oscilloscope. FM DEMOD is adjusted to peak the response displayed on the oscilloscope.

SIGNAL GENERATOR

OUTPUT

5Ofl.

The detected audio is

OSCILLOSCOPE

ADAPTER ADAPTER

SK115

Figure 2-16. Demodulator Adjustment Setup

Equipment

AM/FM Signal Generator Oscilloscope

Adapters

Type N (m) to BNC (f) (2 required) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1250-1476

2-52 Adjustment Procedures

...................................................

.........................................

HP 8640B

HP 1980A/B

13. Demodulator Adjustment

Cables

BNC,122cm(48in)

1:l

Oscilloscope Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10084A

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A

Procedure

1. Set the HP 8560A

luNE)

switch off. Place the analyzer in the service position as

illustrated in Figure 2-16.

2. Connect the to

A4J4).

1:l

probe from the oscilloscope Channel 1 input to A4R718 (the end closest

Set the HP 8560A

switch on.

Connect the HP 8640B RF OUTPUT to

the HP 8560A INPUT 50R.

3. Set the HP 8640B controls as follows:

RANGE MHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61-128

FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OUTPUT LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -10

lOO.OOOMHz

dBm

RF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ON

AM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OFF

FM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..INT

MODULATION FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000 Hz

PEAK DEVIATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 kHz

SCALEFM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..(k/MHz)

4. Adjust the HP 8640B FM Deviation vernier for a full-scale reading on the meter. Set the FM to off.

5. Set the HP 1980A/B controls as follows:

CH 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ON

CH 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OFF

lVOLTS/DIV

TIMEBASE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..MAIN

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

..50mV

CHACOUPLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC

SECS/DIV

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.00

ms/DIV

TRIGGER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..INT

HF REJ............................................................ ON

TRIGGER COUPLING.............................................. AC

6. On the HP 8560A, press

(m)

and set the controls as follows:

CENTER FREQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .lOO MHz

SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...5 MHz

REF LVL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -10

RES BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7. On the HP 8560A, press (PEAK SEARCH) MARKER b CF. Press

(SCTRL)

8. Set the FM to INT on the HP 8640B.

AM/FM DEMOD FM DEMOD ON

ITRIG)

and SINGLE.

ZERO SPAN, then

dBm

100kHz

9. A 1 kHz sine wave should be observed on the oscilloscope.

10. Adjust A4C707 FM DEMOD for a maximum peak-to-peak response on the oscilloscope. See Figure 2-7 for adjustment location.

Adjustment Procedures 2-53

13. Demodulator Adjustment

Note

11. Set

the.HP

It is possible to do this procedure without an oscilloscope by adjusting

A4C707 FM DEMOD for the loudest audio tone from the internal speaker.

This adjustment method may give broader and less accurate results than when using the oscilloscope to peak the response.

8560A

LuNE)

switch to off. Disconnect the probe from A4R718.

2-54 Adjustment Procedures

14. External Mixer Bias Adjustment

Assembly Adjusted

Al5 RF Assembly

Related Performance Test

There is no related performance test for this adjustment procedure.

Description

A voltmeter is connected to the HP 8560A IF INPUT with the external mixer bias set to off. The bias is adjusted for a 0 Vdc output.

SPECTRUM

DIGITAL VOLTMETER

ADAPTER

Al4 FREQUENCY

^ ^- -

ANALYZER

kRD

PROP

SK1

Al5 RF

Figure 2-17. External Mixer Bias Adjustment Setup

Equipment

DVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3456A

Adapters

Type BNC (f) to SMA (m) Type BNC (f) to dual banana plug

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1250-1200

. . _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1251-2816

Cables

BNC,122 cm(48in)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A

Procedure

1. Set the HP 8560A (LINE) switch off and disconnect the ac power cord. Remove the analyzer cover and connect the equipment as illustrated in Figure 2-17. Reconnect the power cord and set the (LINE) switch on.

2. Set the HP 3456A controls as follows:

FUNCTION

RANGE...........................................................O.lV

RESOLUTION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DCVOLTS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..lOOmV

Adjustment Procedures 2-55

14. External Mixer Bias Adjustment

3. On the HP 8560A press

[m)

EXTERNAL MIXER BIAS, then BIAS OFF.

4. Adjust A15R926 EXT BIAS ZERO for a DVM reading of 0.000 Vdc

512.5

mV.

2-56 Adjustment Procedures

15. External Mixer Amplitude Adjustment

Assembly Adjusted

Al5 RF Assembly

Related Performance Test

IF Input Amplitude Accuracy

Description

The slope of the flatness compensation amplifiers is determined. The user-loaded conversion losses for K-band are recorded and reset to 30 dB. A 310.7 MHz signal is applied to the power sensor and the power level of the source is adjusted for a -30 applied to the IF INPUT. The flatness compensation amplifiers are then adjusted (via DACs) to place the displayed signal at the reference level. Only the determination of the Flatness

Compensation Amplifier slope is performed if the HP 8560A has Option 002.

SYNTHESIZED

SWEEPER

FREQUENCY STANDARD EXT

dBm

reading. The signal is then

BNC

CABLE

Figure 2-18. External Mixer Amplitude Adjustment Setup

Equipment

Synthesized Sweeper Measuring Receiver Power Sensor

....................................................

50 MHz Reference Attenuator

(supplied with HP 8484A)

............................................

...............................................

SPECTRUM

POWER SENSOR

OUT

8340A/B

HP 8902A HP 8484A

..................................... HP 11708A

;K117

Adjustment Procedures 2-57

15. External Mixer Amplitude Adjustment

Adapters

Type N (f) to SMA (f) Type N (m) to BNC (f) Type APC 3.5 (f) to APC 3.5 (f)

............................................

...........................................

...................................

Cables

BNC,122cm SMA,61cm

(48in).............................................

(24in)

...............................................8120-1578

Procedure

.1250-1772 .1250-1476 .5061-5311

HP 10503A

1. Set the HP 8560A cover and reconnect the power cord.

2. Set up the equipment as illustrated in Figure 2-18. Do not connect the SMA cable to the HP 8560A.

3. Move the WR PROT/WR ENA jumper on the A2 Controller assembly to the WR ENA position. Set the HP 8560A luNE) switch on.

On the HP 8560A, press

CNV LOSS VS

On the HP 8560A, press

CAL 3RD AMP GAIN. Wait until the message ADJUSTMENT-DONE appears in the active

function block.

Note

6. Press Record any conversion loss reading not equal to 30 dB in Table 2-12 at the appropriate

frequency.

7. If all conversion loss values equal 30

Perform the following steps only if the HP 8560A does not have Option 002.

or @ to display the conversion loss value for each frequency listed in Table 2-12.

FREQ

(LINE]

switch off and disconnect the power cord. Remove the analyzer

(AUX)

LCAL),

MORE 1 OF 2, SERVICE CAL DATA, 3RD IF AMP, and

EXTERNAL MIXER

dB, skip to step 8, otherwise continue to step a.

AMPTD CORRECT , then

a. Refer to Table 2-12 and press

loss value does not equal 30 dB.

b. Use the analyzer front-panel keys to set the conversion loss value to 30 dB.

c. Repeat steps a and b for all frequencies having a conversion loss value other than

dB.

8. Press [INSTR PRESET) on the HP 8340A/B

CW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310.7 MHz

POWERLEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30

2-58 Adjustment Procedures

II]

to select a frequency at which the conversion

and set the controls as follows:

dBm

16. Second IF Gain Adjustment

Assembly Adjusted

Al5 RF Assembly

Related Performance Test

IF Input Amplitude Accuracy

Description

The gain of the Second IF (between A15J801 INT Second IF and the third mixer) is set to

dB.

Note

This adjustment is necessary after replacing either or A15U802 Second IF pad.

A15Al

Second IF Amplifier

Equipment

No test equipment or test setup is required for this adjustment procedure.

Procedure

1. Set the HP 8560A cover. Fold down the Al5 RF and Al4 Frequency Control assemblies. Prop up the Al4

Frequency Control assembly.

2. Remove the shield covering the third converter and Figure 2- 19.

3. Read the gain printed on the from Table 2-13 based upon the gain of the Second IF Amplifier.

4. Reinstall the shield on the Al5 assembly.

5. Perform the External Mixer Amplitude Adjustment.

Note

If the second IF input switch is repaired, there might be insufficient range in the External Mixer Amplitude Adjustment. If this is the case, select a new

value for A15U802. Greater attenuation values of

amplitude, and lower attenuation values will increase the signal amplitude.

switch off, disconnect the power cord, and remove the analyzer

A15Al

Second IF Amplifier label. Select a value for A15U802

Second IF Amplifier. See

U802

will lower the signal

2-60 Adjustment Procedures

16. Second IF Gain Adjustment

c c c

A15Al

(BENEATH 5~ I ELD)

SK118

Figure 2-19. Location of

AlSAl

Adjustment Procedures 2-61

16. Second IF Gain Adjustment Table 2-13. A15U802 Values

Second IF Amplifier

Gain Range

13.1to14.2

14.3to15.2

15.3to16.2

16.3to17.2

17.3to18.2

18.3to19.2

19.3to20.2

(dB)

U802

(dB)

Value

1 2 3 4 5 6 7

Second

IFA

Part Number

0955-0308 0955-0309

0955-0310 0955-0311 0955-0312 0955-0313 0955-0314

Pad

2-62 Adjustment Procedures

17. Signal ID Oscillator Adjustment

Assembly Adjusted

Al5 RF Assembly

Related Performance Test

There is no related performance test for this adjustment procedure.

Description

The frequency range of the 298 MHz Signal ID Oscillator is determined by counting the

10.7 MHz IF as A15C629 is rotated through its range of adjustment. The Signal ID Oscillator

is then set to the frequency determined by the following equation:

Oscillator frequency = 298 MHz

FREQUENCY

COUNTER

SIGNAL

ANALYZER

Al5 RF

ADAPTER

TEE

TEST CABLE

Oscillator frequency range

Al4 FREOUENCYFREOUENCY

A15J601

SPECTRUM ANALYZER

PC BOARD

,’

PROP

SK1 19

Figure 2-20. Signal ID Oscillator Adjustment Setup

Equipment

Microwave Frequency Counter

Spectrum Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP

Adapters

Type N (m) to BNC (f) (2 required) BNC Tee

(f,m,f)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...1250-0781

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 5343A

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1250-1476

Adjustment Procedures 2-63

8566A/B

17. Signal ID Oscillator Adjustment

Cables

BNC, 122 cm (48 in) (2 required) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A

Test Cable, BNC (m) to SMB (f)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85680-60093

Procedure

Set the HP 8560A cover. Fold down the Al5 RF and Al4 Frequency Control assemblies. Prop up the A14 Frequency Control assembly.

Connect the HP 8560A CAL OUTPUT to the INPUT the W29 cable from A15J601 (10.7 MHz IF out) and connect the SMB end of the test cable to A15J601. Connect the rest of the equipment as shown in Figure 2-20.

Reconnect the power cord and set the complete, set the HP 8560A controls as follows:

LuNE)

switch off, disconnect the power cord, and remove the analyzer

500

using an adapter. Disconnect

luNE)

switch on. After the power-on sequence is

CENTERFREQ SPAN

Press

Press (INSTR PRESET) on the HP

CENTER FREQUENCY

FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 kHz

Set the HP 5343A controls as follows:

SAMPLE RATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fully Counterclockwise

50R-1MR

10 Hz-500 MHz/500 MHz-26.5 GHz SWITCH . . . . . . . . . . . .10 Hz-500 MHz

If no signal is displayed on the HP

displayed.

Note

8. Rotate A15C629 SIG ID slightly while observing the HP displayed signal frequency does not change, press SGL SWP on the HP 8560A.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 Hz

(mCTRL)

INTERNAL MIXER SIG ID ON SGL SWP.

SWITCH

If the 298 MHz SIG ID oscillator is severely mistuned, it might be necessary to widen the span on the HP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8566A/B

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . 10.7 MHz

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

and set the controls as follows:

8566A/B,

adjust A15C629 SIG ID until a signal is

8566A/B

to see the shifted sweep.

8566A/B

display. If the

..300MHz

500

2-64 Adjustment Procedures

17. Signal ID Oscillator Adjustment

9. While observing the HP

8566A/B

display, adjust A15C629 SIG ID for the highest obtainable frequency with less than 3 dB decrease in amplitude from maximum. Read this frequency from the frequency counter and record as Fs dB

10. Observe the HP

8566A/B

display as you adjust A15C629 SIG ID for the lowest obtainable

HIGH.

F3 dB

HIGH =

frequency with less than 3 dB decrease in amplitude from maximum. Record the frequency counter reading as Fs dB

11. Calculate the difference between Fs dB Enter the result as

12. Add

FOFFSET

FOFFSET.

to Fs dB

LOW

recorded in step 10 and record the result as

LOW.

HIGH

and Fs dB

F3 dB LOW =

LOW,

then divide results by four.

FOFFSET =

FSIGID.

SIGID

MHz

kHz

MHz

13. Adjust A15C629 for a frequency counter reading equaling

frequency must equal 10.7 MHz

f50

kHz.

FSIGID.

The final adjusted

Adjustment Procedures 2-65

18. 600 MHz Amplitude Adjustment

Assembly Adjusted

Al5 RF Assembly

Related Performance Test

There is no related performance test for this adjustment procedure.

Description

The HP 8566 Spectrum Analyzer is used to monitor the CAL OUTPUT signal of the HP 8560A. Potentiometer R726 is then adjusted to minimize the displayed noise floor and thus ensure proper input power to the ECL divide-by-two chip.

Equipment

Spectrum Analyzer

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8566

Adapters

Type N (m) to BNC (f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1250-1476

Cables

BNC,122

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A

Procedure

1. Set the HP 8560A (LINE) switch off, disconnect the power cord, and remove the analyzer’s cover. Fold down the Al5 RF and Al4 Frequency Control assemblies. Prop up the Al4 Frequency Control Assembly.

2. Connect the equipment as shown in Figure 2-21.

S I GNAL

ANALYZER

FREOIJENCY CONTROL ,~

SPECTRUM

PC BOARD PROP

Al5 Ri

Figure 2-21. 600 MHz Amplitude Adjustment Setup

3. Reconnect the power cord and set the (LINE) switch on.

2-66 Adjustment Procedures

SJl3

HP (Hewlett-Packard) 8560A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Certification

Warranty

Limitation of Warranty

Assistance

Safety Symbols

General Safety Considerations

HP 8560A Spectrum Analyzer Documentation Outline

Manuals Shipped with Your Instrument

Options

General Information

Manual Organization

Manual Text Conventions

Instrument Variations

HP 85629B Test and Adjustment Module

Service Kit

Recommended Test Equipment

Electrostatic Discharge

Reducing Potential for ESD Damage

Returning Instruments for Service

Service Tag

Original Packaging

Sales and Service Offices

Adjustment Procedures

Introduction

Using the TAM

1. High-Voltage Power Supply Adjustment

2. Display Adjustment

4. IF Amplitude Adjustments

5. DC Log Amplifier Adjustments

6. Sampling Oscillator Adjustment

7. YTO Adjustment

8. First LO Distribution Amplifier Adjustment

9. Tracking Generator Power Level Adjustments

10. Frequency Response Adjustment

11. Calibrator Amplitude Adjustment

12. 10 MHz Reference Adjustment (Non-Option 003 only)

13. Demodulator Adjustment

14. External Mixer Bias Adjustment

15. External Mixer Amplitude Adjustment

16. Second IF Gain Adjustment

17. Signal ID Oscillator Adjustment

18. 600 MHz Amplitude Adjustment