HP 8590 schematic

Service Guide

8590 Series Analyzers

Assembly-Level Repair

Manufacturing Part Number: 08590-90316

Supersedes: 08590-90300

Printed in USA

April 2001

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

Agilent Technologies makes no warranty of any kind with regard to this material, including but not limited to, the implied warranties of merchantability and ﬁtness for a particular purpose. Agilent Technologies shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.

Certiﬁcation

Agilent Technologiescertiﬁesthat this product met its published speciﬁcations at the time of shipment from the factory.Agilent Technologies 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.

Regulatory Information

The speciﬁcations and characteristics chapter in this manual contain regulatory information.

Warranty

This Agilent Technologies instrument product is warranted against defects in material and workmanship for a period of one year from date of shipment. During the warranty period, Agilent Technologies 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 Agilent Technologies. Buyer shall prepay shipping charges to Agilent Technologies and Agilent Technologies shall pay shipping charges to return the product to Buyer. However, Buyer shall pay all shipping charges, duties, and taxes for products returned to Agilent Technologies from another country.

Agilent Technologies warrants that its software and ﬁrmware designated by Agilent Technologies for use with an instrument will execute its programming instructions when properly installed on that instrument. Agilent Technologies does not warrant that the operation of the instrument, or software,orﬁrmware 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. AGILENT TECHNOLOGIES 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. AGILENT TECHNOLOGIES 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 Agilent Technologies products.

For any assistance, contact your nearest Agilent Technologies Sales and Service Ofﬁce.

8590 E-Series and L-Series Spectrum Analyzer Documentation Description

The following guides are shipped with your 8590 E-Series or L-Series spectrum analyzer.

8590 E-Series Spectrum Analyzers and 8591C Cable TV Analyzer Calibration Guide

• Tells you how to test your analyzer to determine if the analyzer meets its speciﬁcations.

8590 E-Series and L-Series Spectrum Analyzers User’s Guide

• Tells you how to make measurements with your analyzer.

• Describes the analyzer features.

• Tells you what to do in case of a failure.

8590 E-Series and L-Series Spectrum Analyzers Quick Reference Guide

• Describes how to make a simple measurement with your analyzer.

• Brieﬂy describes the analyzer functions.

• Lists all the programming commands.

8591C Cable TV Analyzer Documentation Description

The following guides are shipped with your cable TV analyzer.

8590 E-Series Spectrum Analyzers and 8591C Cable TV Analyzer Calibration Guide

• Tells you how to test your analyzer to determine if the analyzer meets its speciﬁcations.

8591C Cable TV Analyzer User’s Guides

Cable TV Measurements

• Tells you how to make cable TV measurements with your analyzer.

• Describes the cable TV analyzer mode features.

Spectrum Analyzer Reference

• Tells you how to make measurements using the spectrum analyzer

mode.

• Describes the spectrum analyzer mode features.

• Tells you what to do in case of a failure.

8591C Cable TV Analyzer Getting Started and Quick Reference Guide

• Describes how to make a simple measurement with your analyzer.

• Brieﬂy describes the cable TV and spectrum analyzer functions.

• Provides a quick reference for cable TV and spectrum analyzer

softkeys.

8590 E-Series and L-Series Spectrum Analyzers, and 8591C Cable TV Analyzer Programmer’s Guide

• Describes analyzer operation via a remote controller (computer) for

Parallel/RS-232 or Parallel/GPIB interface. This manual is provided when ordering either Option 041, Option 043, or 8591C.

8594Q QAM Analyzer Documentation Description

The following guides are shipped with your QAM analyzer.

8590 Series Analyzers Calibration Guide

• Tells you how to test your analyzer to determine if the analyzer meets its speciﬁcations.

8594Q QAM Analyzer User's Guides

Option 190/195 DVB-C/Data Measurements

• Tells you how to make QAM measurements with your analyzer.

• Describes the QAM analyzer mode features.

Spectrum Analyzer Reference

• Tells you how to make measurements using the spectrum analyzer

mode.

• Describes the spectrum analyzer mode features.

• Tells you what to do in case of a failure.

8594Q Option 190/195 DVB-C/Data Measurement QAM Analyzer Getting Started and Quick Reference Guide

• Provides a quick reference for QAM and spectrum analyzer softkeys.

Documentation Options

Option 041 or 043: Programmer's Guide

8590 E-Series and L-Series Spectrum Analyzers, and 8591C Cable TV Analyzer Programmer's Guide

• Describes analyzer operation via a remote controller (computer) for Parallel/RS-232 or Parallel/GPIB interface.

Option 910: Additional User's Documentation

Provides an additional copy of the user's guides, the calibration guide, and the quick reference guide.

Option 915: Service Guide and Component-Level Information

Describes troubleshooting and repair of the analyzer. Option 915 consists of two manuals:

8590 Series Analyzers Assembly-Level Repair Service Guide

• Describes adjustment and assembly level repair of the analyzer.

8590 Series Analyzers Component-Level Repair Service Guide

• Provides information for component-level repair of the analyzer.

How to Order Guides

Each of the guides listed above can be ordered individually. To order, contact your local Sales and Service Ofﬁce.

How to Use This Guide

This guide uses the following conventions.

Front-Panel Key This represents a key physically located on the instrument

front panel.

Softkey This indicates a “softkey,” a key whose label is determined by

the instrument's ﬁrmware. Softkeys are located on the display bezel.

Screen Text This indicates text displayed on the instrument screen.

Contents

1. Introduction

The 8590 Series Analyzers Assembly-Level Repair Service Guide. . . . . . . . . . . . . . . . . . . . . 14

Service Guide Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Analyzer Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Firmware Revision Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Firmware Upgrade Kit Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Reliability Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Adjustment Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Test Equipment You Will Need . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

When A 3335A Source Is Not Available . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

If There Are Abnormal Indications During Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Periodically Verifying Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Standard-Value Replacement Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

If You Replace or Repair an Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

2. Making Adjustments

Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

1a. Display (with four access holes in top of shield) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

1b. Display (with eight access holes in top of shield) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

2. Sampler Match . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

3. 10 MHz Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

4. 10 MHz Precision Frequency Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

5. Crystal and LC Bandwidth Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

6. Cal Attenuator Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

7. Log and Linear Ampliﬁer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

8. CAL FREQ Adjustment Routine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

9. CAL AMPTD Adjustment Routine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

10. CAL YTF Adjustment Routine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

11. CAL MXR Adjustment Routine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

12. Second Converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

13. Third Converter and Second IF Bandpass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

14. Comb Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

15. Frequency Response of the 8590L, 8591C, and 8591E . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

16. Frequency Response of the 8592L/94L, 8593E/94E/95E/96E, and 8594Q . . . . . . . . . . . 106

17. Time and Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

18. Modulator Offset and Gain for Option 010 or 011 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

19. Entering External ALC Correction Constants for Option 010 or 011 . . . . . . . . . . . . . . 129

20. Checking the External ALC for Option 010 or 011 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

21. Correcting for External ALC Error for Option 010 or 011 . . . . . . . . . . . . . . . . . . . . . . . 135

22. First LO Distribution Ampliﬁer for Option 009 or 010 . . . . . . . . . . . . . . . . . . . . . . . . . . 139

23. BITG Power Level for Option 010 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

24. Tracking Oscillator for Option 010 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

25. Checking the Absolute Amplitude Accuracy for Option 050 . . . . . . . . . . . . . . . . . . . . . . 151

26. Correcting for Absolute Amplitude Accuracy for Option 050 . . . . . . . . . . . . . . . . . . . . . 157

27. Checking the Absolute Amplitude Accuracy for Option 051 . . . . . . . . . . . . . . . . . . . . . . 160

28. Correcting for Absolute Amplitude Accuracy for Option 051 . . . . . . . . . . . . . . . . . . . . . 171

Contents

2a. Making Adjustments: If 3335A Source Not Available

Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .178

6a. Cal Attenuator Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .179

7a. Log and Linear Ampliﬁer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .186

15a. Frequency Response of the 8590L, 8591C, and 8591E . . . . . . . . . . . . . . . . . . . . . . . . . .191

3. Backing Up and Reloading Correction Constants

Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .200

Backing Up Analyzer Correction Constants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .201

Analyzer Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .204

Reloading the Correction Constants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .207

Instrument Calibration after Reloading the Correction Constants . . . . . . . . . . . . . . . . . . . .209

4. Troubleshooting the Analyzer

Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .216

Problems at Instrument Power-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .219

Troubleshooting an Inoperative Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .221

Troubleshooting the A2 Display Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .227

Isolating an RF, LO, IF, or Video Problem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .232

Using the Internal Service-Diagnostic Routines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .238

Troubleshooting the A16 Processor/Video Board Assembly . . . . . . . . . . . . . . . . . . . . . . . . . .249

5. Troubleshooting the IF Section

Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .254

Service Equipment You Will Need . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .254

After an Analyzer Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .255

IF Section Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .255

IF Power-Level Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .256

Troubleshooting the A15 Motherboard Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .266

6. Troubleshooting the RF Section

Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .282

Service Equipment You Will Need . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .283

After an Analyzer Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .283

6a. 8590L, 8591C, and 8591E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .284

6b. 8592L/94L, 8594Q, and 8593E/94E/95E/96E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .287

7. Replacing Major Assemblies

Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .294

Service Equipment You Will Need . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .294

After an Analyzer Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .295

Removal and Replacement Procedures in this Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . .295

Instrument Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .296

A1 Front-Frame Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .298

A1A1 Keyboard/Front-Panel Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .302

A2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .303

RF Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .308

A3 Front-End Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .311

Contents

A7 Analog Interface Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318

A8 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322

A15 Motherboard and IF Extrusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324

A16 Processor/Video Board and A16A1 Memory Board Assembly . . . . . . . . . . . . . . . . . . . . 330

A16 Processor/Video Board Firmware ROMs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335

A16A1BT1 Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337

A17 Memory Card Reader Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339

A25 Counter-Lock Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342

B1 Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344

Rear-Frame Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 346

8. If You Have A Problem

Contacting Agilent Technologies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350

Check the Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 351

Calling Agilent Technologies Sales and Service Ofﬁces . . . . . . . . . . . . . . . . . . . . . . . . . . . . 352

Returning Your Analyzer for Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355

9. Assembly Descriptions and Block Diagrams

Assembly Descriptions and Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 358

RF and LO Section for 8590L, 8591E, and 8591C Spectrum Analyzers . . . . . . . . . . . . . . . 359

RF and LO Section for 8592L, 8593E, 8594E, 8594L, 8594Q,

8595E, and 8596E Analyzers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 365

IF Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 373

10. Analyzer Options and Block Diagrams

Analyzer Options and Block Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 394

Option Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 397

Troubleshooting Analyzer Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408

Tracking Generator 8593E, 8594E, 8595E, 8596E Option 010 . . . . . . . . . . . . . . . . . . . . . . 410

First LO Distribution Ampliﬁer (LODA) 8593E, 8594E, 8594Q, 8595E, 8596E

Option 009 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 419

Option 190 DVB-C Connection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 433

Option 190 DVB-C Service Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 434

11. Major Assembly and Cable Locations

Major Assembly and Cable Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 454

12. Replaceable Parts

Replaceable Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 486

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 487

Standard-Value Replacement Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 497

Component-Level Information Packets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 521

13. Softkey Descriptions

Softkey Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 554

Contents

14. Analyzer Messages

Interpreting Analyzer Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .614

15. Service Equipment and Tools

Service Equipment and Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .660

16. Safety and Regulatory Information

Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .668

Safety Symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .668

Instrument Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .669

General Safety Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .670

Protection from Electrostatic Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .672

1 Introduction

The 8590 Series Analyzers Assembly-Level Repair Service Guide provides the information needed to adjust and repair the 8590 E-Series and L-Series spectrum analyzers, the 8591C cable TV analyzer and 8594Q QAM analyzer to the assembly level.

Introduction

The 8590 Series Analyzers Assembly-Level Repair Service Guide

The 8590 Series Analyzers Component-Level Repair Service Guide provides component-level information for the repair of individual analyzer assemblies. The binder contains Component-Level Information Packets (CLIPs) for selected assemblies. Each CLIP contains component-level schematics, a component parts list, and illustrations for component location by reference designator.Each CLIP has its own part number which is changed whenever the part number for its related analyzer assembly is changed. A list of all CLIP part numbers for the 8590 E-Series and L-Series spectrum analyzers, 8591C cable TV analyzers, and 8594Q QAM analyzers is provided in Chapter

12 of this service guide.

Figure 1-1 8590 E-Series and L-Series Spectrum Analyzers, 8591C Cable TV

Analyzers, and 8594Q QAM Analyzer

14 Chapter1

Introduction

Service Guide Organization

The guide is divided into the following chapters.

• Chapter 1, “Introduction,” contains information on the analyzer identiﬁcation, ﬁrmware revisions and upgrades, and safety and reliability considerations.

• Chapter 2, “Making Adjustments,” contains the adjustment procedures needed to adjust the analyzer to meet its speciﬁcations.

• Chapter 2a, “Making Adjustments: 3335A Source Not Available,” contains the adjustment procedures needed to adjust the analyzer to meet its speciﬁcations when a 3335A source is not available.

• Chapter 3, “Backing Up and Reloading Correction Constants,” contains information for safe-guarding the correction data stored in the analyzer and restoring the analyzer memory.

• Chapter 4, “Troubleshooting the Analyzer,”contains information for starting to troubleshoot a analyzer failure.

• Chapter 5, “Troubleshooting the IF Section,” contains speciﬁc troubleshooting information for selected assemblies in the IF section and the A15 Motherland assembly.

• Chapter 6, “Troubleshooting the RF Section,” contains troubleshooting information for the RF and LO sections of the 8590 E-Series and L-Series spectrum analyzer and 8591C cable TV analyzer. The information is separated by the following tabs.

• Chapter 6a, “8590L, 8591C and 8591E,” contains speciﬁc troubleshooting information for selected assemblies within the RF and LO sections of the 8590L, 8591E spectrum analyzers, and 8591C cable TV analyzers.

• Chapter 6b, “8592L/94L, 8594Q, and 8593E/94E/95E/96E,” contains speciﬁc troubleshooting information for selected assemblies within the RF and LO sections of the 8592L, 8594L, 8593E, 8594E, 8595E, 8596E spectrum analyzers, and the 8594Q QAM analyzer.

• Chapter 7, “Replacing Major Assemblies,” contains instructions for the removal and replacement of most major assemblies.

• Chapter 8, “Contacting Agilent Technologies,” contains information on how to contact Agilent Technologies and return the analyzer for repair.

• Chapter 9, “Assembly Descriptions and Block Diagrams,” contains information and block diagrams describing analyzer operation and individual assemblies.

Chapter 1 15

Introduction

Analyzer Description

• Chapter 10, “Analyzer Options and Block Diagrams,” contains information on the available analyzer options.

• Chapter 11, “Major Assembly and Cable Locations,” contains ﬁgures identifying all major assemblies and cables.

• Chapter 12, “Replaceable Parts,” contains information needed to order assemblies and component-level information for the analyzer.

• Chapter 13, “Softkey Descriptions,” contains a description of the calibration, service, and diagnostic softkeys.

• Chapter 14, “Analyzer Messages,” contains a description of the analyzer messages that are displayed when there is a problem with the analyzer.

• Chapter 15, “Service Equipment and Tools,” contains information about equipment and tools used to service the analyzer.

Analyzer Description

The 8590 E-Series and L-Series spectrum analyzers, 8591C cable TV analyzers, and 8594Q QAM analyzers provide measurement capabilities over the RF and Microwave frequency ranges.

The frequency ranges of 8590 E-Series and L-Series spectrum analyzers, 8591C cable TV analyzers, and 8594Q QAM analyzers are described below.

All 8590 E-Series spectrum analyzers, 8591C cable TV analyzers and 8594Q QAM analyzers are equipped with a memory card reader. The memory card reader allows the analyzer to use downloadable software programs. The functional “personality” of the analyzer can also be altered using the memory card reader. This feature provides the user with one analyzer that can perform the function of other types of microwave test equipment.

Further information about the 8590 E-Series and L-Series spectrum analyzers, and the available options, is provided in Chapter 10,

“Analyzer Options and Block Diagrams,” of this service guide and

the 8590 E-Series and L-Series Spectrum Analyzers User's Guide. Further information about the 8591C cable TV analyzer and 8594Q QAM analyzer is provided in the spectrum analyzer reference for your instrument. Further information about the 8594Q QAM analyzer is provided in 8594Q QAM Analyzer Spectrum Analyzer Reference User's Guide.

16 Chapter1

Introduction

Analyzer Description

Table 1-1 8590 E-Series and L-Series Spectrum Analyzer, 8591C Cable TV

Analyzer and 8594Q QAM Analyzer Frequency Ranges

Analyzer Model Frequency Range

8590L 9 kHz to 1.8 GHz 8591E 9 kHz to 1.8 GHz 8591C 1 MHz to 1.8 GHz 8592L 9 kHz to 22.0 GHz

8592L (Option 026) 9 kHz to 26.5 GHz

8593E 9 kHz to 22.0 GHz

8593E (Option 026) 9 kHz to 26.5 GHz

8594E 9 kHz to 2.9 GHz 8594L 9 kHz to 2.9 GHz 8594Q 9 kHz to 2.9 GHz 8595E 9 kHz to 6.5 GHz 8596E 9 kHz to 12.8 GHz

Chapter 1 17

Introduction

Firmware Revision Date

When the analyzer is ﬁrst turned on, a display appears that contains the copyright date and ﬁrmware revision date. (If the analyzer has either Option 041, IB and parallel I/O, or Option 043, RS-232 and parallel I/O, the display will also contain the entries shown on the ﬁrst line of the example below.)

The version of ﬁrmware installed in the analyzer is identiﬁed by the year, month, and day in the following format.

Whenever you contact Agilent Technologies about your analyzer, be sure to provide the ﬁrmware date along with the complete serial number and option designation. This will ensure that you obtain accurate service information.

Firmware Upgrade Kit Ordering Information

There are occasions when the factory revises the analyzer ﬁrmware to correct defects or make performance improvements. When a ﬁrmware revision is needed, a service note is distributed by the factory to all Agilent Technologies service centers. The service note identiﬁes, by serial-number preﬁx, the analyzers that require the latest ﬁrmware upgrade kit.

If your analyzer requires a ﬁrmware upgrade kit, it can be obtained by ordering as described in Chapter 12, “Replaceable Parts.”Instructions for the replacement of the ﬁrmware ROMs is located under “A16 Processor/Video Board Firmware ROM” in Chapter 7, “Replacing Major

Assemblies,” of this guide.

18 Chapter1

Introduction

Reliability Considerations

Analyzer Input Protection

The analyzer input circuitry can be damaged by power levels that exceed the maximum safe input-level speciﬁcations. Table 1-2 through

Table 1-5 provides the input speciﬁcations. To prevent input damage,

these speciﬁed levels for your analyzer must not be exceeded. The analyzer input can also be damaged by large transients. If it is

likely that your analyzer will be exposed to potentially damaging transients, take whatever precautions are necessary to protect its input circuitry.

The analyzer input can easily be protected by disconnecting it from the signal source whenever it is likely that large transients will be present. When it is impractical to disconnect the analyzer, a transient-limiting device should be used.

The 11947A Transient Limiter is an analyzer accessory that protects the input circuitry from transients and accidental overloads. Contact your local Agilent Technologies sales or service ofﬁce for more information about the 11947A.

CAUTION Transients are often produced during electromagnetic interference

(EMI) conducted emissions testing. One type of device, the line impedance stabilization network (LISN), can produce large transients when its switch position or voltage input is changed.

Chapter 1 19

Introduction

Reliability Considerations

Table 1-2 8590L and 8591E Spectrum Analyzer and 8591C Cable TV

Analyzer &Maximum Safe Input Level

INPUT 50Ω (Input

Attenuation ≥10 dB)

Average Continuous Power Peak Pulse Power

dc 25 Vdc 100 Vdc

+30 dBm (1 W) +30 dBm (1 W)

INPUT 75Ω (Input

Attenuation ≥10 dB)

+75 dBmV (0.4 W) +75 dBmV (0.4 W)

Table 1-3 8592L and 8593E Spectrum Analyzer Maximum Safe Input

Level

INPUT 50Ω (Input Attenuation

≥10 dB bands 1 through 4)

Average Continuous Power Peak Pulse Power

dc 0 Vdc

+30 dBm (1 W, 7.1 V rms), input attenuation ≥10 dB

+50 dBm (100 W) for <10 µs pulse width and <1% duty cycle, ssfs input attenuation ≥30 dB

Table 1-4 8594E and 8594L Spectrum Analyzer and 8594Q Analyzer

Maximum Safe Input Level

INPUT 50Ω (Input Attenuation ≥10 dB)

Average Continuous Power Peak Pulse Power

dc 0 V (dc coupled)

+30 dBm (1 W, 7.1 V rms) +50 dBm (100 W) for <10 µs pulse width and

<1% duty cycle, input attenuation ≥30 dB

50 V (ac coupled)

Table 1-5 8595E and 8596E Spectrum Analyzer Maximum Safe Input

Level

INPUT 50Ω (Input Attenuation ≥10 dB

above 2.75 GHz)

Average Continuous Power Peak Pulse Power

dc 0 V (dc coupled)

+30 dBm (1 W, 7.1 V rms) +50 dBm (100 W) for <10 µs pulse width and

<1% duty cycle, input attenuation ≥30 dB

50 V (ac coupled)

20 Chapter1

Introduction

Adjustment Procedures

The following table lists the analyzer adjustments in Chapter 2 and Chapter 2a and the models that they apply to. Select the model of the analyzer being adjusted and note the adjustments marked in the analyzer model column to determine which adjustments should be performed.

Table 1-6 8590 E-Series and L-Series Spectrum Analyzer, 8591C Cable TV

and 8594Q QAM Analyzer Adjustment Procedures

Adjustment for Spectrum Analyzer Model:

Adjustment Procedure Name

8590L

8591C

1. Display •••••••••

2. Sampler Match •••••••••

3. 10 MHz Reference •••••••••

4. 10 MHz Precision Frequency Reference

5. Crystal and LC Bandwidth Filter •••••••••

6a.

7a.

8. CAL FREQ Adjustment Routine •••••••••

9. CAL AMPTD Adjustment Routine •••••••••

10. CAL YTF Adjustment Routine • • •

11. CAL MXR Adjustment Routine • • •

Cal Attenuator Error Cal Attenuator Error Log and Linear Ampliﬁer Log and Linear Ampliﬁer

•• •• ••

•••••••••

8591E

8592L

8593E

8596E

8594E

8594L

8594Q

8595E

12. Second Converter • • •

13. Third Converter and Second IF Bandpass

14. Comb Generator • •

15. Frequency Response of the 8590L, 8591C, and 8591E

Chapter 1 21

•••••••••

•••

Introduction

Adjustment Procedures

Table 1-6 8590 E-Series and L-Series Spectrum Analyzer, 8591C Cable TV

and 8594Q QAM Analyzer Adjustment Procedures

Adjustment for Spectrum Analyzer Model:

Adjustment Procedure Name

8590L

8591C

15a. Frequency Response of the 8590L,

8591C, and 8591E

16. Frequency Response of the 8592L, 8593E,8594E, 8594L, 8594Q,8595E, 8596E

17. Time and Date •••••••••

18. Modulator Offset and Gain for Option 010 or 011

19. Entering External ALC Correction Constants for Option 010 or 011

20. Checking the External ALC for Option 010 or 011

21. Correcting the External ALC Error for Option 010 or 011

22. First LO Distribution Ampliﬁer for Option 009 or 010

23. BITG Power Level for Option 010 • • •

•••

8592L

8591E

••••••

8593E

8596E

•• •

8594E

8594L

8594Q

8595E

24. Tracking Oscillator for Option 010 • • •

25. Checking the Absolute Amplitude Accuracy for Option 050

26. Correcting for Absolute Amplitude Accuracy for Option 050

27. Checking the Absolute Amplitude Accuracy for Option 051

28. Correcting for Absolute Amplitude Accuracy for Option 051

••• •

••• `•

a. If a 3335A source is not available, use the alternative adjustment with the same

number found in Chapter 2a , “Making Adjustments: If 3335A Source Not Avail-

able.”

b. If a 3335A source is not available, substitute this adjustment for the one with the

same number found in Chapter 2 , “Making Adjustments.”

22 Chapter1

Introduction

Safety

Familiarize yourself with the safety symbols marked on the analyzer, and read the general safety instructions and the symbol deﬁnitions given in Chapter 16 , “Safety and Regulatory Information,” before you begin the procedures in this chapter.

Test Equipment You Will Need

Refer to Chapter 1 of the calibration guide for your instrument for a list of recommended equipment for the analyzer adjustments. Any equipment that meets the critical speciﬁcations given in the table can be substituted for the recommended model.

If a 3335A Synthesizer/Level Generator is not available, see Chapter 1 of the calibration guide for your instrument for alternative recommended test equipment, accessories, and adapters.

When A 3335A Source Is Not Available

The 3335A Synthesizer Level Generator signal source has become obsolete because parts used in the manufacture of this instrument are no longer available from suppliers. To meet the need of our customers, this service guide has been revised to add new adjustments that do not use the 3335A Synthesizer Level Generator. This revision includes the addition of signal sources required to replace the 3335A, changes i to the test equipment setup illustrations, and changes in the steps required to execute the adjustments.

Since all of our customers will not need to replace their 3335A Synthesizer Level Generators immediately, the original adjustments which use the 3335A signal generator have been retained. The revisions have been incorporated in this service guide as Chapter 2a ,

“Making Adjustments: If 3335A Source Not Available.”

Chapter 1 23

Introduction

If There Are Abnormal Indications During Adjustment

If the indications received during an adjustment do not agree with the normal conditions given in the adjustment procedures, a fault exists in your analyzer. The fault should be repaired before proceeding with any further adjustments. Refer to the troubleshooting and repair information in Chapter 4, “Troubleshooting the Analyzer,” of this guide.

Periodically Verifying Calibration

The analyzer requires periodic veriﬁcation of operation. Under most conditions of use, you should test the analyzer at least once a year with either operation veriﬁcation or the complete set of performance veriﬁcation tests located in the calibration guide for your instrument.

When test results show proper operation and calibration, no adjustments are necessary. However, if test results indicate that the instrument does not meet speciﬁcations, the cause should be determined and rectiﬁed. Refer to the troubleshooting information in

Chapter 4, “Troubleshooting the Analyzer,” before attempting

recalibration.

Standard-Value Replacement Components

Part numbers for standard-value replacement components used in the adjustment procedures are located in Chapter 12, “Replaceable Parts,” of this service guide.

24 Chapter1

Introduction

If You Replace or Repair an Assembly

If one or more analyzer assemblies has been replaced or repaired, related adjustment procedures should be done prior to verifying operation. Refer to Table 1-7 to determine which adjustment to perform after replacing or repairing an assembly. Find the assembly that has been repaired or replaced in the left-hand column. Then perform the adjustments marked across the adjustment column for that assembly. It is important that adjustments are performed in the order indicated to ensure that the instrument meets all of its speciﬁcations.

Table 1-7 Adjustments and Tests for Replaced or Repaired Assemblies

Replaced or Repaired Assembly

A1 Front Frame CAL AMPTD Frequency Response

A2 Display Display

A3A1 Comb Generator Comb Generator

A3A2 Microwave Switch

A3A3 Low-Pass Filter CAL FREQ

A3A4 Second Converter

Related Adjustments and Adjustment Routines

CAL AMPTD

CAL YTF

CAL FREQ CAL AMPTD CAL YTF

CAL AMPTD CAL YTF

CAL FREQ CAL AMPTD CAL YTF

Related PerformanceVeriﬁcationTests

Residual Responses Frequency Response

Residual Responses Comb Generator Frequency Accuracy

Frequency Response Residual Responses

Noise Sidebands System Related Sidebands Frequency Response Other Input Related Spurious Responses Spurious Response Gain Compression Displayed Average Noise Residual Responses

A3A5 Input Attenuator CAL FREQ

CAL AMPTD CAL YTF Frequency Response

Chapter 1 25

Frequency Response Residual Responses

Introduction

If You Replace or Repair an Assembly

Table 1-7 Adjustments and Tests for Replaced or Repaired Assemblies

Replaced or Repaired Assembly

A3A6 Dual Mixer or Low Band Mixer

A3A7 YIG-Tuned Oscillator

A3A8 YIG-Tuned Filter or A3A8 Switched YIG-Tuned Filter

Related Adjustments and Adjustment Routines

CAL FREQ CAL AMPTD CAL YTF CAL MXR Frequency Response

First LO Distribution Ampliﬁer for Option 009 or 010

CAL FREQ CAL AMPTD CAL YTF

CAL FREQ CAL AMPTD CAL YTF CAL MXR Frequency Response

Related PerformanceVeriﬁcationTests

Noise Sidebands System Related Sidebands Frequency Response Other Input Related Spurious Responses Spurious Response Gain Compression Displayed Average Noise Residual Responses

Frequency Readout & Marker Count Accy Noise Sidebands System Related Sidebands Residual FM Frequency Span Readout Accy Frequency Response Other Input Related Spurious Responses Spurious Response Residual Responses

Noise Sidebands System Related Sidebands Frequency Response Other Input Related Spurious Responses Spurious Response Displayed Average Noise Residual Responses

A3A9 Bandpass Filter CAL FREQ

CAL AMPTD

A3A10 Directional Coupler

A3A11 Step-Recovery Diode

A3A12 3 dB Attenuator CAL FREQ

A3A13 Isolator CAL FREQ

CAL FREQ CAL AMPTD CAL YTF

CAL FREQ CAL AMPTD

CAL AMPTD

CAL AMPTD CAL YTF

None

System Related Sidebands Frequency Response Other Input Related Spurious Responses Spurious Responses Residual Responses

Comb Generator Frequency Accuracy

None

System Related Sidebands Frequency Response Other Input Related Spurious Responses Spurious Responses Residual Responses

26 Chapter1

Introduction

If You Replace or Repair an Assembly

Table 1-7 Adjustments and Tests for Replaced or Repaired Assemblies

Replaced or Repaired Assembly

A3A14 LO Distribution Ampliﬁer (LODA)

A3A15 Tracking Generator

A3 Input Attenuator CAL FREQ

Related Adjustments and Adjustment Routines

First LO Distribution Ampliﬁer for Option 009 or 010 only

CAL FREQ CAL AMPTD CAL YTF

First LO Distribution Ampliﬁer for Option 009 or 010

CAL FREQ CAL AMPTD CAL YTF BITG Power Level for Option 010

CAL AMPTD

Related PerformanceVeriﬁcationTests

Frequency Readout and Marker Count Accy Noise Sidebands System Related Sidebands Residual FM Frequency Span Readout Accuracy Frequency Response Other Input Related Spurious Responses Spurious Response Residual Responses

Frequency Response

A4 First Converter Frequency Response

CAL FREQ CAL AMPTD

A5 Second Converter Second Converter

CAL FREQ CAL AMPTD

A6 YIG-Tuned Oscillator

CAL FREQ CAL AMPTD

Noise Sidebands System Related Sidebands Frequency Response Spurious Response Gain Compression Displayed Average Noise Residual Responses

Noise Sidebands Residual FM System Related Sidebands Frequency Response Spurious Response Gain Compression Displayed Average Noise Residual Responses

Noise Sidebands Residual FM System Related Sidebands Frequency Span Readout Accuracy Frequency Response Spurious Response Displayed Average Noise Residual Responses

Chapter 1 27

Introduction

If You Replace or Repair an Assembly

Table 1-7 Adjustments and Tests for Replaced or Repaired Assemblies

Replaced or Repaired Assembly

A7 Analog Interface CAL FREQ

A7A1 Tracking Generator Control

Related Adjustments and Adjustment Routines

CAL AMPTD CAL YTF (8592L, 8593E, 8595E, 8596E only)

Modulator Offset and Gain for Option 010 or 011 Entering External ALC Correction Constants for Option 010 or 011 Checking the External ALC for Option 010 or 011 Correcting the External ALC Error for Option 010 or 011

Related PerformanceVeriﬁcationTests

Frequency Readout and Marker Count Accy Noise Sidebands Residual FM System Related Sidebands Frequency Span Readout Accuracy Sweeptime Accuracy Scale Fidelity Reference Level Accuracy Absolute Amplitude Calibration and Resolution Bandwidth Switching Uncertainties Frequency Response

Absolute Amplitude, Vernier, and Power Sweep Accuracy Tracking Generator Level Flatness Harmonic Spurious Outputs Non-Harmonic Spurious Outputs Tracking Generator Feedthrough

A8 Power Supply None System Related Sidebands

Spurious Responses Residual Responses

A9 Third Converter Third Converter

&Second IF Bandpass CAL FREQ CAL AMPTD BITG Power Level for Option 010 only

A10 LODA Control (Opt. 009) or Tracking Generator Control (Opt. 010)

First LO Distribution Ampliﬁer for Option 009 or 010 only CAL FREQ CAL AMPTD CAL YTF

Noise Sidebands System Related Sidebands Absolute Amplitude Calibration and Resolution Bandwidth Switching Uncertainties Other Input Related Spurious Spurious Responses Displayed Average Noise Residual Responses

Frequency Response Absolute Amplitude, Vernier and Power Sweep Accuracy Tracking Generator Level Flatness

28 Chapter1

Introduction

If You Replace or Repair an Assembly

Table 1-7 Adjustments and Tests for Replaced or Repaired Assemblies

Replaced or Repaired Assembly

A11 Bandwidth Crystal and IC

A12Amplitude Control CAL FREQ

A13 Bandwidth Crystal and IC

A14 Log Ampliﬁer Log and Linear

A15 Motherboard CAL FREQ

A16 Processor/Video A16A1 Memory

Related Adjustments and Adjustment Routines

Bandwidth Filter CAL FREQ CAL AMPTD

CAL AMPTD

Bandwidth Filter CAL FREQ CAL AMPTD

Ampliﬁer CAL FREQ CAL AMPTD

CAL AMPTD 10 MHz Reference

CAL FREQ CAL AMPTD CAL YTF (8592L, 8593E, 8595E, 8596E only) CAL MXR † (8592L, 8593E, 8595E, 8596E only) Cal Attenuator Error † Frequency Response † Time and Date

Related PerformanceVeriﬁcationTests

Resolution Bandwidth Accuracy Absolute Amplitude Calibration and Bandwidth Switching Uncertainties

Scale Fidelity Displayed Average Noise

Resolution Bandwidth Accuracy Absolute Amplitude Calibration and Bandwidth Switching Uncertainties

Scale Fidelity Reference Level Accuracy

Complete Operation Veriﬁcation

Reference Level Accuracy Frequency Response

† These adjustments are not necessary if valid correction constants are recovered from the defective A16 processor/video assembly. See the A16 processor/video board assembly replacement procedure in this service guide.

Chapter 1 29

Introduction

If You Replace or Repair an Assembly

30 Chapter1

+ 644 hidden pages