Agilent Technologies 8922S Specifications

Assembly Level Repair

HP/Agilent Technologies

8922 Series GSM Test Set

Agilent Part No. 08922-90213

Printed in UK

January 1998

© Copyright 1998, Agilent Technologies. All rights reserved. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws.

Introduction

Introduction

The HP/Agilent 8922 product family uses an assembly level repair service strategy. The

HP/Agilent 8922 may be sent to an Agilent Technologies Sales and Service office or may be repaired on site. This book is used for both Agilent Technologies service and owner service.

The HP/Agilent 8922 product family currently contains the HP/Agilent 8922A, HP/

Agilent 8922B, HP/Agilent 8922E, HP/Agilent 8922F, HP/Agilent 8922G, HP/

Agilent 8922H, HP/Agilent 8922M and HP/Agilent 8922S. There are differences in both the hardware and in the operation. In examples and task sequences this book presents general usage, and graphical instrument representations may not exactly match the HP/

Agilent 8922 that you are servicing.

Repairing the HP/Agilent 8922

To repair the HP/Agilent 8922, follow the chapters in this book starting at the beginning and following the “where to go next” guidelines.

Book Organization

This book contains problem identification sections, assembly replacement sections, reference information and concept information. The chapters are sectioned in three parts;

Service Procedures, Reference Information and Theory. This sectioning helps to identify the type of information found in a group of chapters.

i

Introduction ii

Contents

Introduction i

1 Localizing the Problem

Introduction 1-2

Localizing the Problem - Flow Chart (Power-Up) 1-3

Power-Up Checks 1-4

If Power-Up Checks FAILED 1-5

If Power-Up Happened Correctly 1-10

2 Running Diagnostics

Introduction 2-2

Running Memory Card or ROM Based Diagnostics 2-3

Loading and Running the Ram Test 2-7

3 Verifying Performance

Introduction 3-2

Installing and Operating the Software 3-2

Using the Compatibility Switch for the HP/Agilent 8922F/

H or M/S 3-3

4 Using the HP/Agilent 83210A Service Kit

Introduction 4-2

Configuring the RF Extender 4-3

Extending Modules 4-5

Making Measurements 4-6

5 Troubleshooting the Controller/Display

Introduction 5-2

Parallel Bus 5-3

Serial Bus 5-4

Display 5-5

Keyboard 5-6

Contents-1

Contents

Contents-2

6 Troubleshooting the Power Supply

Introduction 6-2

Power Cord Verification 6-3

Line Voltage Selection / Line Fuse Replacement 6-5

Transformer / Power Switch 6-6

A28 Power Supply 6-7

Where To Go Next 6-8

7 Adjustments and Calibration

Introduction 7-2

Timebase Adjustments 7-3

Periodic Calibrations 7-5

Sum Loop Adjustment Procedure 7-6

8 Assembly and Disassembly Procedures

Introduction 8-2

Top and Bottom Cover Removal 8-3

Inside Protective Covers 8-4

AF, Digital and RF Assemblies Removal 8-5

A1 Front Panel Removal 8-7

A10 Power Supply Regulator Removal 8-9

A11 Receiver Mixer Removal 8-10

A12 Pulse Attenuator Removal 8-12

A21 GPIB Interface Removal 8-14

A22 Display Removal 8-16

A23 Input Section Removal 8-18

A24 Attenuator Removal 8-19

A28 Power Supply Removal 8-20

Fan Removal 8-22

Transformer Removal 8-24

Contents

9 Replacing a Part

Introduction 9-2

Replaceable Parts 9-3

Firmware Upgrades 9-29

10 Service Screen

Introduction 10-2

11 Self-Test Error Messages

Introduction 11-2

12 Module I/O Specifications

Introduction 12-2

A2 Audio Analyzer 2 12-3

A3 Audio Analyzer 1 12-5

A4 Modulation Distribution 12-8

A5 Premodulation Filter and NSM 12-10

A6 Signaling Source/Analyzer 12-13

A9 Global Test and Demod 12-15

A11 Receiver Mixer 12-19

A13 Output 12-22

A14 Pulse Driver 12-24

A15 Reference 12-26

A16 Receiver 12-32

A18 Spectrum Analyzer 12-36

A19 Measurement 12-38

A23 Input (HP/Agilent 8922A.B,E,F,G,H) Only 12-43

A23 Input (Agilent 8922M/S Only) 12-47

A25 Sum Loop 12-50

A17, A26 Step Loop 12-53

A27 DAC/Upconverter 12-56

Contents-3

Contents

A28 Power Supply 12-58

A33 Hop Controller 12-59

13 Instrument Block Diagrams

Introduction 13-2

14 Block Diagram Theory of Operation

Introduction 14-2

Technical Discussion 14-3

Block Diagram 1 14-4


Block Diagram 3

HP/Agilent 8922B Only 14-15



15 Diagnostics Theory

Introduction 15-2

AF_DIAGS 15-3

RF_DIAGS 15-5

MS_DIAGS 15-11

GSM and DCS Diagnostic Tests 15-12

Interpreting Results 15-13

Contents-4

Contents

16 Measurement Theory

Introduction 16-2

17 GSM Theory

Introduction 17-2

The GSM System 17-3

E-GSM, DCS1800 and PCS1900 Systems 17-4

Index 1

Contents-5

Contents

This Page Intentionally Left Blank

Contents-6

1

Localizing the Problem

1-1

Localizing the Problem

Introduction

Introduction

This chapter helps to determine if a problem actually exists and which section of the instrument has a problem.

This chapter comprises of four sections.

❒ Localizing the Problem Flow Chart (Power-Up)

❒ Power-Up Checks

❒ If Power-Up Failed

• Power-Up Self Test Diagnostics

❒ If Power-Up Happened Correctly

• Checking the RF Analyzer using the RF Generator

• Checking the RF Analyzer using the AF Generator

1-2


Localizing the Problem - Flow Chart (Power-Up)

Figure 1-1

Localizing the Problem - Flow Chart (Power-Up)

See "Power Up Checks", in this Chapter, for details of the steps given in the flow chart below.

Power On

Goto;

NO

"Troubleshooting the

Power Supply"

Goto;

"Power-Up Self Test

Diagnostics"

Failure

Reported by

Diagnostics ?

NO

Fan On?

NO

YES

Beep after

6 seconds?

NO

YES

Messages

OK?

NO

YES

Keys &

Controls OK?

YES

Goto;

"If Power-Up

Happened Correctly"

YES

Goto the relevant trouble shooting section;

• "Trouble Shooting The Controller/Display" - Chapter 5.

• "Trouble Shooting The Power Supply" - Chapter 6.

• "Running Diagnostics" - Chapter 2

Localizing the Problem - Flow Chart

1-3


Power-Up Checks

Figure 1-2

NOTE

Power-Up Checks

The following checks show whether the instrument is powering up correctly.

(a) Depress the power button on the front panel (see diagram).

(b) Check that the fan on the rear panel is working.

(c) Listen for a single “beep” after pressing the power switch. This can be from 6 to 20 seconds, depending on model type.

(d) Check the display on the front panel for any error messages. (The normal message which will appear is “All host processor self-tests passed.” and/or "Frequency

Reference Cal lost. Perform Reference Calibration".)

(b)

(Rear Panel Vent)

(d)

(c)

"Beep"

(a)

Power-Up Checks - Agilent 8922x

If an error message appears after power up it may not be the only message which has appeared. Only the last message will be shown on this message line.

Press SHIFT , error messages.

TESTS (MSG) to access the message screen for a list of all the

1-4


If Power-Up Checks FAILED

Table 1-1


If the power up checks failed, continue with this section.

❒ If the fan did not start, see "Troubleshooting the Power Supply", Chapter 6.

❒ If the fan started, but any of the other power-up checks failed, see "Power-Up Self Test

Diagnostics".

❒ If an error message occurs, refer to the Agilent 8922x Users Guide for additional information.

Error Message Numbers

If the error message refers to a self test error it will be of the form:

One or more self tests failed: Error Code XXXX

Where xxxx corresponds to the error message number shown in the table below.

Error Message Numbers

Failure

Fatal Error - Host Processor Failure

Fatal Error - ROM Checksum Failure

Fatal Error - RAM Failure

Fatal Error - RAM Failure

Fatal Error - Timer Failure

Real Time Clock Failure

Keyboard Failure

Serial I/O Failure

Internal Serial Bus Communication Failure

CRT Failure

Miscellaneous Hardware Failure

Error

Number

0002

0004

0008

0010

0020

0040

0080

0100

0200

0400

0800

Suspect Assembly

A7 Controller

A8 Memory

A8 Memory

A8 Memory

A7 Controller

A8 Memory

A1 Keyboard

A21 GPIB

Serial Bus

A19 CRT Drive

Miscellaneous H/W

1-5



Power-Up Self Test Diagnostics

If the power-up sequence failed, the power-up self-tests can be re-run with the covers off.

The LED’s on the controller board give the results of the power-up self-test.

(a) Remove the instrument covers. Refer to the section "Top and Bottom

Covers", Chapter 8, for details.

(b) Power up the instrument.

(c) Read the LED sequence given on the controller board. These LED’s can be read with the shields in place (refer to the diagram below)

3 2 1 0

Location of LED’s

Front Panel

(View from top)

Figure 1-3

NOTE

Self Test LED Location

For multiple failures, the patterns for each failure will appear in sequence.

1-6



Table 1-2

The following conventions are used to represent the LED’s throughout this chapter.

LED Conventions

LED shown in tables Represnts

A ’lit’ LED

An ‘off’ LED

A flashing LED

LED Sequences

The LED error sequence will show two states, pass or fail, which are outlined below. The suspect assembly is given in the following tables, before moving on consult the section

"Self-Test Diagnostic Result".

No Failures

Detected The LED’s will light for approximately 10 seconds, then all will turn off.

3 2 1 0

Lit for 10 seconds.

Failure Detected 1 The LED’s will initially all light.

2 The next pattern blinks rapidly, and shows that an assembly has failed.

3 The third sequence flashes twice and gives further information on the area of the board that has failed.

4 The LED’s will light then go out.

1-7



Table 1-3

NOTE

Sequence of LED Patterns

1

3 2 1 0

2

3 2 1 0

Assembly failure.

3

3 2 1 0 3 2 1 0

Serial Bus

Communication

Failures

4

3 2 1 0 3 2 1 0

No more errors.

1. The third patterns are only documented for a serial bus communication failure. This is represented by the two outside LED’s flashing.

2. The second and third patterns will be the same. It will appear as if the same pattern has flashed twice.

For more than one error in the Agilent 8922x the LED’s will flash in the same sequence for each assembly that is faulty.

1-8



Where to Go Next

❒ If the LED’s did not light at all, go to Chapter 6, "Troubleshooting the Power Supply".

❒ If an error messgae occurs, use it in Chapter 2, "Running Diagnostics" to choose which diagnostic test to run. See also Chapter 11 "Self Test Error Messages".

❒ If this section is used due to display problems, go to Chapter 5 "Troubleshooting the

Controller/Display" before the error messages are repaired.

GPIB/

1-9


If Power-Up Happened Correctly

NOTE


If power-up happened correctly and no problem is indicated, this section is used to functionally check most of the hardware. The generators are checked first with external measurements, then the analyzers are checked with the generator. The RF Generator is checked at 935 MHz and 10 dBm. The AF Generator is checked at 1 kHz and 1 V. These checks are for indication only, performance tests in Chapter 3, “Verifying Performance”, will test specifications.

If you possess an Agilent 8922S or Agilent 8922M, you should first re-configure your instrument as an HP/Agilent 8922E or HP/8922G. To do this, select the following keys:

• CONFIG (this is accessible from the Cell Control screen in the bottom right-hand corner).

•

• Compatible , select (HP 8922E or HP 8922G)

PRESET

Referring to Figure 1-4, ensure the connections are made.

Figure 1-4

NOTE

AUDIO RF OUT

AUDIO OUT

AF To Oscilloscope

RF To Spectrum Analayzer

Front Panel Connections

Press RF GEN/RF ANL .

On the HP/Agilent 8922A/B, press RF GEN/RF ANL

On the HP/Agilent 8922E/F/G/H/M/S, press SHIFT

.

, CELL CNTL (RFG/RFA).

1-10

Highlight the RF Output field (1).

Select AUX RF OUT from the list of choices.

Set the RF Generator Amplitude field to 10 dBm (2).

Set the AF Generator Amplitude field to 1 V (3).

1 2



3

Figure 1-5 RF Analyzer Settings


• If the generators are within specifications, go to the next section, “Checking the RF

Analyzer Using the RF Generator”.

• If one or both of the generators appear to be faulty, go to Chapter 2, “Running

Diagnostics” and run the appropriate tests.

1-11



Checking the RF Analyzer Using the RF Generator

This section tests the RF Analyzer using the RF Generator as a signal source. This task assumes the same setting used in the previous section.

• Connect the RF In/Out to the Aux RF Out.

Figure 1-6

NOTE

Front Panel Connections for the RF Analyzer

Press RF GEN RF ANL .

On the HP/Agilent 8922A/B, press RF GEN RF ANL

On the HP/Agilent 8922E/F/G/H/M/S, press SHIFT ,

.

CELL CNTL (RF GEN RF ANL).

1-12



• Set the RF Analyzer Frequency field to 935 MHz (1).

• Set the RF Analyzer Amplitude field to 10 dBm (2).

• Set the Mod Source GMSK field to Off (3).

• Select More in the bottom right-hand corner of the screen (4).

1 2 3

Figure 1-7 RF Generator/Analyzer Settings

4

1-13



• Select CW/AF ANL from the list of choices, and read the CW Freq (5) and CW Power

(6) fields.

5 6

Figure 1-8 CW Readings


• If the analyzer measurement was within the specification, go to the next section,

“Checking the AF Analyzer using the AF Generator”.

• If the measurement was faulty, go to Chapter 2, “Running Diagnostics”, and run the test related to the RF Analyzer.

1-14



Checking the AF Analzyer Using the AF Generator

This section tests the AF Analyzer with the AF Generator as a source. The AF Generator settings are the same as the first task, and displays the CW MEAS/AF ANL screen.

• Connect the AUDIO OUT to the AUDIO IN.

Figure 1-9 Front Panel Connections for the Audio Check

• Select More and from the list, select CW MEAS/AF ANL .

• Highlight AF Anl In and select AUDIO IN (1).

• Read the AC Level (2) and the AF Freq (3) reading.

2 3

1

Figure 1-10 Audio Measurements

1-15



Where to go next

• If the analyzer measurement was within specification, go to Chapter 2, “Running

Diagnostics” and run all the tests.

• If the analyzer measurement was faulty, go to Chapter 2, “Running Diagnostics” and run the tests relating to the AF Analyzer.

1-16

2

Running Diagnostics

2-1

Running Diagnostics

Introduction

Introduction

There are two types of diagnostics for the HP/Agilent 8922: diagnostic tests and the HP/

Agilent 8922B specific “RAM Test”. The latter is appropriate for the HP/Agilent 8922B only. The diagnostic tests are contained either on the memory card, part number 08922-

10003 or in ROM memory for instruments with firmware revision code A.03.00 and above. The HP/Agilent 8922B specific “RAM Test” is contained on the “08922-10001,

8922B Driver” disk supplied with the HP/Agilent 8922B.

Most of the diagnostic tests relate to a fault in a specific instrument section. Therefore, if chapter 1 identified a specific section of the instrument, only those tests need to be run.

The diagnostic tests whose names begin with E or G are specifically for the HP/Agilent

8922E/G. The other tests are for any HP/Agilent 8922.

This chapter comprises two sections. The first section, “Running Memory Card or RAM

Based Diagnostics”, shows how to load and run the memory card based or ROM based diagnostics. The second section, “Loading and Running the RAM Test”, shows how to load and run the HP/Agilent 8922B RAM test. Equipment requirements and installation procedures are given in the HP/Agilent 8922B User’s Guide, Part Number 08922-90020.

This chapter uses the diagnostic test names from an early memory card revision. ROM based diagnostic test names may differ from the names used in this chapter.

2-2

Running Diagnostics

Running Memory Card or ROM Based Diagnostics


Do these steps in the order shown

1 - Press PRESET

3 Press TESTS

2 - Insert Memory Card (Optional)

2-3

Running Diagnostics


6

Move cursor here and press knob.

4

For Memory Cards:

If CARD is displayed, go to step 6, if not move the cursor to this field, press knob and continue at step 5.

8

Move cursor here and press knob. Follow the instructions to start.

5 Select CARD

7 Select,

AF_DIAGS,

RF_DIAGS1,

MS_DIAGS1,

CAL_REV,

LOOP_BACK

To select another test;

• To select another tests from the same program use the RESUME user key.

• To select a test from another program press

TESTS key and begin at step 6.

2-4

Running Diagnostics


Reading Memory Card Diagnostic Test Results

Test Results

Assemblies suspected to be defective

Probability Indicator

Troubleshoot the assembly with the highest probability first and re-run test. Continue this process with all assemblies listed until the defect is found. See also Chapter 15 "Diagnostic Theory'.

2-5

Running Diagnostics


Selecting Memory Card Diagnostic Test Execution Conditions

WHILE RUNNING A TEST BEFORE RUNNING A TEST

Specifies whether to run measurements continuously or stop after completion of each measurement. This choice can be modified when a diagnostic program is running.

Specifies whether to stop testing or continue when a failure occurs. This choice can be modified when a diagnostic program is running.

This feature is not used by the diagnostic program.

Specifies whether to print diagnostic test results.

These options are used for controlling various parts of the tests. These options can be changed depending on the test program. They are selected by using the cursor and knob.

Where to Go Next:

If any high-probability failures occurred, those assemblies can be replaced and the test rerun. When the tests pass, the performance tests can be run to verify performance (refer to

Chapter 3). If low-probability failures occur, the performance tests can be run for further indication or measurements can be made to individual assemblies using Chapters 4, 12 and 13.

2-6

Running Diagnostics

Loading and Running the Ram Test


Your HP/Agilent 8922B comes with software to test the Data Buffer.

Loading the RAM Test

1 Locate the floppy disk labeled “08922-10001, 8922B Driver.”

2 Insert the disk into the drive.

3 Type MSI A: (substitute your drive specifier for A: if your drive is not drive A) and press ENTER .

4 Type LOAD “DRIVER22B”,1 and press ENTER .

5

The Data Buffer Driver will now be loaded and will begin to run.

Press K3, "Test RAM

6 Use the cursor to select the output device.

7 Select the area of RAM to test and Press

8 Repeat selection for each area of RAM.

K0, "Accept .

Where to go next

• If any of the RAM areas tested bad go to chapters 8 and 9.

•

Selecting from a List

⇓

• Use and ⇓ of the list.

⇓

• Use SHIFT to scroll through the list. A beep will sound when you reach an end

or PG UP to move to the first item in the list.

Use SHIFT ⇓ or PG DOWN to move to the last item in the list.

• Use screen.

ENTER or to select the current item and move to the next field on the

• Use to select the current item and move to the previous field on the screen.

2-7

Running Diagnostics



2-8

3

Verifying Performance

3-1

Verifying Performance

Introduction

Introduction

Because of the specialized nature of the HP/Agilent 8922 and the equipment required to support it, it is recommended that calibration and repair be performed only by specially equipped Agilent Technologies service centers.

A list of specifications and verfication tests can be found in the HP/Agilent 8922x User’s

Guide.

Verification

Performance Test Software provided with the product is used to verify the electrical performance of the HP/Agilent 8922 GSM Test Set. If the instrument passes this verification, its operation and specifications are assured within the measurement uncertainties provided in the performance test print out.

Installing and Operating the Software

Performace Test Software

This is supplied on a 3.5-inch, double-sided floppy disk and is written to run with BASIC

5.0 and later. Modifications to the program should be limited to changing the default addresses and storing copies for back-up purposes.

Understanding the Tests

Test Descriptions contains a description of each test that is performed by the Performance

Test software. This description is intended to help locate problems if the software fails to execute properly or to help users understand the test methodology that is used in each performance test. The descriptions are not step by step procedures for manual performance tests.

3-2


Using the Compatibility Switch for the HP/Agilent 8922F/H or M/S

To Load the Program in the Agilent 8922M/S.

To verify the performance of the HP/Agilent 8922H/M you need to convert the instrument back from an HP/Agilent 8922G, or convert the HP/Agilent 8922F/S to an HP/Agilent

8922E.

You are now ready to run the Performance Test Software.

1) Put the disk in the disk drive.

2) Type ``LOAD "PT_8922"'', press ENTER.

After you have completed the Performance Tests, return the instrument back to the

HP/Agilent 8922F/S or HP/Agilent 8922H/M using the same process in reverse.

Using the Compatibility Switch for the

HP/Agilent 8922F/H or M/S

Back Conversion

To turn the instrument from the HP/Agilent 8922H/M or HP/Agilent 8922F/S back to an

HP/Agilent 8922G or an HP/Agilent 8922E, select the following keys:

❒ CONFIG (this is accessible from the Cell Control screen in the bottom right-hand corner).

❒ Compatible, select HP 8922G or HP 8922E

❒ HP-IB Adrs (22)

❒ PRESET

The instrument is now set up as an HP/Agilent 8922G or HP/Agilent 8922E and ready for

Performance Verification testing.

Forward Conversion

To return the instrument from an HP/Agilent 8922G back to an HP/Agilent 8922H/M or an HP/Agilent 8922E to an HP/Agilent 8922F/S, select the following keys:

❒ More (this is accessible from the Cell Control screen in the bottom right-hand corner).

Scroll down the list and select CONFIG.

❒ Compatible, select HP 8922H/M or HP 8922F/S

❒ HP-IB Adrs (14)

❒ PRESET

The instrument is returned to an HP/Agilent 8922H/M or HP/Agilent 8922F/S.

3-3


Using the Compatibility Switch for the HP/Agilent 8922F/H or M/S

To Configure the GPIB Addresses

1) With the program loaded, type ``EDIT DEFAULT_ADDRESS'', press ENTER.

2) Modify each line to indicate the proper instrument address (700-730).

It is now possible to re-store the program as "PT_8922" or store it under a different name.

To Run the Program

1) Type ``RUN'', press ENTER.

2) Follow the directions as they appear on the screen.

Notes on Running the Program.

The first screen which appears is the GPIB status of each piece of test equipment that is supported. It is only necessary to have the instruments responding that will be used in each particular test. Make certain that each instrument you will be using is responding at the proper address. Duplicate addresses may make an instrument appear to be responding but this is not allowed. Press "I" (for Ignore) to continue past this screen.

The second screen prompts you for the instrument model. If you have disk 08922-10006, select HP 8922G (for HP/Agilent 8922H/M performance testing) or HP 8922E (for

HP/Agilent 8922F/S performance testing). The third screen which will appear is the main

Performance Tests selection menu. Three options are available on this screen:

❒ Select the performance test to run, remember the test instruments and UUT must be responding over GPIB.

❒ Turn the printer function ON or OFF. If the printer function is turned on it must be responding over GPIB or the program will lock up.

❒ Exit from the program.

Press the key corresponding to the option that you would like to perform.

The other screens that appear are connection instructions, error messages and output results.

3-4

4

Using the HP/Agilent 83210A Service Kit

4-1

Using the HP/Agilent 83210A Service Kit

Introduction

Introduction

This section is a supplement to the diagnostics program for troubleshooting the

HP/Agilent 8922 to the assembly level. The extender boards should be used when the diagnostics cannot correctly isolate a defective assembly, or when it is necessary to verify the module level performance of the HP/Agilent 8922.

The section provides the information necessary to extend and troubleshoot the input and output signals for most RF, audio, and digital assemblies.

4-2


Configuring the RF Extender

Table 4-1


To extend RF modules, it is necessary to use the RF extender board (08922-60129) with the correct coax jumper cables. These cables route the RF signals to and from the module and allow the signal path to be accessed for measurements. The following table and diagram shows the coax jumpers that are required for each RF module.

Coax Jumpers for RF Extender Board

Assembly

Number

ForA13 X

For A14 X

For A15

ForA16

For A17

On PLUG 1 Connect Pin Number On PLUG 3 Connect Pin Numbers

3 7 9 13 17 3 9 13 15 17 20

X

X

X

For A18 X

For A25 X

For A26 X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

ForA27 X X X X

4-3



The following example shows how to interpret table 4-2 and install the coax jumpers on the extender board. This example shows the configuration for the A13 assembly.

Figure 4-1 RF Extender Board

4-4


Extending Modules

Table 4-2

Extending Modules

The modules shown in the following table can be extended using the appropriate extender boards from the HP/Agilent 83210A Service Kit. Assemblies that cannot be extended can usually be accessed directly while the assembly is installed in the instrument.

Extender Board Part Numbers

A19

A20

A25

A26

A27

A33

A15

A16

A17

A18

A8

A9

A13

A14

A5

A6

A7

REF # DESCRIPTION

A2 Audio Analyzer 2

A3

A4

Audio Analyzer 1

Modulation Distribution

Premod Filter and NSM

Signaling Source / Analyzer

Controller

Memory

Global Test and Demod

Output

GSM Timing Gen

Reference

Receiver

Step Loop B

Spectrum Analyzer

Measurement

CRT Driver

Sum Loop

Step Loop A

DAC / Upconverter

Hop Controller

EXTENDER

08920-60142

08920-60142

08920-60141

08922-60132

08920-60140

08920-60133

08920-90135

08922-60132

08922-60133

08922-60129

08922-60129

08922-60129

08922-60129

08922-60129

08922-60129

08920-60138

08920-60135

08922-60129

08922-60129

08922-60129

08920-60133

4-5


Making Measurements


Audio / Digital Assemblies

The extender boards for the audio and digital assemblies allow the boards to be extended above the instrument. This provides better access to signals going to and from these assemblies. Refer to the “Block Diagrams” (chapter 13) or “Module I/O Specs”

(chapter 12) for pin numbers and typical I/O characteristics for each assembly. Use the extender board shown.

RF ASSEMBLIES

The extender boards for the RF assemblies extend the modules above the instrument. This allows better access to control signals and allows the RF input and output signal paths to be opened for making measurements. The following procedure outlines the steps necessary to make measurements on the RF modules with the RF extender board.

1. Configure the RF extender card with the proper coax jumpers. Refer to table 4-2 and figure 4-1.

2. Decide the signal path that needs to be measured. Find the correct plug number and pin number on the “Block Diagrams” (chapter 13) or “Module I/O Specs” (chapter 12).

4-6



3. Remove the correct coax jumper and connect a measurement instrument as shown in the following diagram. To measure signals going TO the module, measurements should be made on the lower row of connectors on the extender module. Outputs coming

FROM the modules (going into the instrument) are measured on the top row of connectors on the extender board.

4. Turn off the instrument’s power switch. Remove the module from the instrument.

Install the module onto the extender board and install the extender board into the instrument.

5. Power on the instrument and make the measurements.

4-7




4-8

5

Troubleshooting the Controller/Display

5-1

Troubleshooting the Controller/Display

Introduction

Introduction

This chapter helps isolate problems in the control sections of the instrument, the sections are:

• A1 Keyboard

• A7 Controller

• A8 Memory

• A20 CRT Driver

• A21 HP-IB Interface

• A33 Hop Controller

Problems in the Control sections can be broken into four types, these types are:

• Parallel Bus

• Serial Bus

• Display

• Keyboard

This chapter addresses each category in a separate section. This chapter assumes that

Chapter 13, Instrument Block Diagram will be used as a reference.

5-2


Parallel Bus

Parallel Bus

The parallel bus is at the center of the control section. The parallel bus is defined as direct connections to the A7 Controller. These connections include the data bus, address bus and dedicated parallel control lines.

The assemblies on the parallel bus are:

• A1 Keyboard

• A6 Signalling Source/Analyzer

• A7 Controller

• A8 Memory

• A9 Global Test/Demod

• A19 Measurement Board

• A20 CRT Driver

• A21 GPIB Interface

• A32 GSM Controller

• A33 Hop Controller

Most problems with the parallel bus are accounted for in the power-up self-tests. The selftests check the A7 Controller first, then the A8 Memory. If these two tests pass, the instrument will beep once after approximately 10 seconds. If these tests do not pass, the problem is probably on one of the two boards or something is pulling down the parallel bus.

The assemblies that are not directly checked by the power-on self-tests are the A1

Keyboard and the A21 GPIB Interface.

5-3


Serial Bus

Serial Bus

The serial bus controls many of the assemblies through individual serial control lines. The serial control lines are generated at the A33 Hop Controller.

The A33 Hop Controller takes parallel data from the A7 Controller and de-multiplexes the data for the assemblies on the serial bus. In the power-up self-tests, the A33 Hop

Controller and the assemblies on the serial bus are tested. If a power-up self-test serial bus failure occurs and no A33 failures have occurred, the problem could be between the A33

Hop Controller and the assembly identified in the failure.

5-4


Display

Display

The display section contains the A22 CRT, and the A20 CRT Drive. The A20 CRT Drive receives parallel data from the A7 Controller and generates the drive signals for the A22

CRT. The A20 CRT Drive is tested during the power-up self-tests for the ability to receive data and to respond back to the A7 Controller. If the A20 CRT Drive passes the power-up self-tests and the display does not respond the signals going to the A22 CRT can be checked at J6 on the A29 Motherboard.

Line Name Pin Number Description

INTHIGH J6(1) CRT intensity reference high. Up to 100 V with respect to INTLOW. Floating with respect to ground. From the A22 CRT to bias the intensity drive circuit at the A20 CRT Drive.

INTW J6(2)

INTLOW J6(3)

CRT intensity control voltage. Up to 100 V with respect to INTLOW. Floating with respect to ground.

From the A20 CRT Drive to the A22 CRT to vary the intensity of the display.

CRT intensity reference low. Floats with respect to ground. From the A22 CRT to the low side of the intensity drive circuit at the A20 CRT Drive.

HSYNC J6(4)

+12CRT

VID

VSYNC

J6(5)

J6(6)

J6(7)

Horizontal sync pulse for the A22 CRT. A TTL pulse at approximately 19 kHz. From the A20 CRT

Drive to the A22 CRT. The HP/Agilent 8922F/H/M/S use a 15 kHz PAL signal.

Filtered +12AUX for the A22 CRT. There is a 20 kHz low pass filter on the A29 Motherboard to filter the +12AUX for the A22 CRT.

Video signal for the A22 CRT. A TTL signal to turn the signals off and on. The rate is approximately

6.25 MHz. From the A20 CRT Drive to the A20

CRT.

Vertical sync pulse for the A22 CRT. A TTL signal from the A20 CRT Drive to the A22 CRT at a rate of approximately 60 Hz.

GND J6(8)

5-5


Keyboard

Table 5-1

Keyboard

The A1 Keyboard assembly contains both the keys and the knob. The keyboard is configured in a matrix with the rows being scanned with pulses from the A7 Controller and the columns being read by the controller. The column lines are pulled up through resistors and are pulled low when a key is pressed. The A7 Controller determines which key is being pressed by reading which column line is pulled low and which row the column line is being pulled low through. Since the row outputs are tri-state, the low-going pulses are not seen on the output until a key is pressed and the current path is completed.

The keyboard can be checked with an oscilloscope by disconnecting the ribbon cable from the keyboard and checking for the pull-up voltages on the column pins. Then with the keyboard connected, check that the lines are being pulled low at the A7 Controller connector J4. The pin numbers on A7-J4 are the same as those on A1-J1. The ribbon cable connector has a mark to indicate to pin 1. Pin 2 is directly opposite pin 1.

HP/Agilent 8922E/F/G/H/M/S Keyboard (HP/Agilent 8922 A/B keys shown in parenthesis)

Column 4

Pin 13

L1(K4)

Column 5

Pin 14

L2(K5)

Column 0

Pin 9

CELL

CONFIG

(RF GEN/

RF ANL)

CELL

CNTL

(HOP

CNTRL)

MEAS

SYNC

Column 1

Pin 10

ORGCALL

(K1)

INCR

÷

10

INCRSET

PREV

TESTS

MEAS

ARM

INCR

7

8

×

RECALL 9

LOCAL ENTER

10

Column 2

Pin 11

RCVCALL

(K2) down arrow

PRESET up arrow

4

5

6

GHZ dBm

Column 3

Pin 12

ENDCALL

(K3) not used not used not used

1

2

3

MHz V

.

SHIFT not used not used

0

+/kHzmV

CANCEL not used leftarrow

ON/OFF ppm W

% dB

Hz

µ

µ

V

V

5-6


Keyboard

If the pull-up voltages are present at the end of the ribbon cable and the voltages are not pulled down when a key is pressed, the problem is most likely on the A1 Keyboard assembly. If the pull up voltages are present and are pulled down when a key is pressed but the controller does not respond, the problem is most likely at the A7 Controller assembly.

The knob can be checked with an oscilloscope at the J4 connector on the A7 Controller.

When the knob is turned, pulses should be present on A7-J4 pins 19 and 21. When the knob is pushed the level at A7-J4 pin 23 should change states. The A1 Keyboard end of the ribbon cable should also be checked for +5 V on pins 15 and 16. If the signals are getting to the A7 Controller the problem is most likely at the A7 Controller assembly.


If either the A1 Keyboard or A7 Controller assemblies measured in-correctly, go to chapters 8 and 9.

5-7


Keyboard


5-8

6

Troubleshooting the Power Supply

6-1

Troubleshooting the Power Supply

Introduction

NOTE

Introduction

This chapter helps verify that the power supply is at fault when no indication for power is present upon power-up. If the power supply appears defective, the problem can be localized to the line module, mains (line) fuse, transformer, power supply, regulator, motherboard, or power switch. This chapter is arranged to check each section of the power supply. The views of the instrument in this chapter are both top and bottom views with the covers removed. Refer to chapter 8 “Assembly/Disassembly” for help in removing the covers.

The mains (line) fuses and power supply DC fuses in the HP/Agilent 8922 are all fast-blow fuses (not “slow-blow”).

6-2


Power Cord Verification

Table 6-1


Use this diagram to verify that the correct line cord is being used.

Line Cords

PlugType

Cable

Agilent

Part

Number

C

D

8120-1351

8120-1703

0

4

Plug Description

90/Straight BS1363A a

90

Length, inches

(mm)

Cable

Color

90 (229)

90 (229)

Mint

Gray

Mint

Gray

For Use In

Country

United Kingdom,

Cyprus, Nigeria,

Rhodesia,

Singapore

8120-1369

8120-0696

0

4

Straight

NZSS198/ASC112 a

Straight/90

8120-1689

8120-1692

7

2

Straight

90

79 (201)

87 (221)

79 (201)

79 (201)

Gray

Gray

Mint

Gray

Mint

Gray

Australis,

Argentina,

New Zealand,

Mainland China

East and West

Europe, Central

African Republic,

Arabia, Egypt

8120-1378

8120-4753

8120-1521

8120-4754

1

6

1

Straight NEMA5-15P a

Straight

90

90

8120-1348

8120-1538

2

3

Straight

90

8120-2104 3

8120-2296

8120-3997

4

4

8120-0698 6

Straight SEV 1011

1959-24507, Type 12

Straight/90

Straight/90

Straight/NEMA6-15P

80 (203)

90 (230)

80 (203)

90 (230)

80 (203)

80 (203)

79 (201)

79 (201)

177 (402)

90 (230)

Jade

Gray

Jade

Gray

Jade

Gray

Dark

Gray

Dark

Gray

Gray

Gray

Gray

Black

United States,

Canada, Mexico,

Phillipines, Taiwan,

Japan

Switzerland

United States,

Canada

Continued Over

6-3



Table 6-1 Line Cords

PlugType

Cable

Agilent

Part

Number

8120-2956

8120-2957

8120-3997

3

4

4

C

D

Plug Description

90/Straight

90/90

Straight/Straight

Length, inches

(mm)

Cable

Color

79 (201) Gray

Gray

Gray

For Use In

Country

Denmark

8120-4211

8120-4600

7

8

Straight IEC83-B1 a

Straight/90

79 (201)

79 (201)

Black

Gray

South Africa, India

8120-1860

8120-1575

8120-2191

8120-4379

6

0

8

8

Straight CEE22-V1

(Systems Cabinet Use)

Straight/Straight

Straight/90

90/90

59 (150)

31 (79)

59 (150)

80 (203)

Jade

Gray

Jade

Gray

Jade

Gray

Jade

Gray a.Part number shown for plug is industry identifier for plug only. Number shown for cable is Agilent Part Number for complete cable including plug. E = Earth Ground; L = Line; N = Neutral.

6-4


Line Voltage Selection / Line Fuse Replacement

Line Voltage Selection / Line Fuse Replacement

Use this diagram to verify that the line module is set to the correct line voltage, that the fuse is not blown, and that it is the correct value.

6-5


Transformer / Power Switch

Transformer / Power Switch

Use this diagram to verify that the correct voltages are present when the instrument’s power cord is connected. The table shows the expected values and pin numbers.

6-6


A28 Power Supply


Use this diagram to verify that the regulated voltages are present and correct at the output of the power supply board, and at the mother board connection to the regulator. Use this diagram also to check the fuses on the fuse board. The tables show the voltages, connectors, pin numbers, and fuse values.

6-7


Where To Go Next

Where To Go Next

If any part of the power supply is defective refer to chapter 8 “Assembly/Disassembly” and chapter 9 “Replacing a Part” for removal and replacement. After the power supply is repaired, go to chapter 1 “Localizing the Problem” to verify that no other problems exist.

6-8

7

Adjustments and Calibration

7-1

Adjustments and Calibration

Introduction

Introduction

This chapter contains information to perform the necessary calibrations and adjustments for periodic maintenance or following repairs. Each year the timebase and periodic calibration adjustments should be performed. Also, the overall performance of the instrument should be verified each year with the automated performance tests in chapter 3

“Running Performance Tests”.

The calibrations and adjustments covered in this chapter are divided into three sections:

❒ Timebase Adjustments

• Standard Timebase

• Optional High Stability Timebase

❒ Periodic Calibrations (ROM based)

• Voltmeter Reference

• Audio Frequency Generator Gain

• External Modulation Path Gain

• Audio Analyzer 1 Offset

❒ Sum Loop Adjustment Procedure

7-2


Timebase Adjustments

NOTE


Standard Timebase Adjustment Procedure (Reference Calibration)

This procedure should only be performed after the instrument has warmed up at least 30 minutes. It should be performed after replacement of the reference section A15, or if the instrument gives an error message “Frequency reference cal lost. Perform reference calibration.”

1. Connect a 10 MHz source to the rear panel REF IN connector.

2. On the configuration screen, select the “Calibrate” field.

3. Wait approximately 15 seconds; the reference will be calibrated.

7-3



NOTE

Option 001 High Stability Timebase Adjustment Procedure

1. Remove the instrument top cover. Power up the instrument and let it warm up for approximately 1 hour.

2. Remove the rear-panel cable between the Opt. 001 REF OUT and REF IN connectors

(if present).

3. Attach a high accuracy frequency counter to the rear panel OPT 001 REF OUT. The frequency counter resolution and accuracy should be at least 1 Hz at 10 MHz.

4. Adjust the high stability timebase (see figure 7-1) until the frequency counter reads 10

MHz.

After performing this calibration, it is necessary to install a cable from the OPT 001 REF

OUT to the REF IN connector for the instrument to use the high stability timebase as the reference.

Adjust to

10 Mhz

Figure 7-1 High Stability Timebase Adjustment

7-4


Periodic Calibrations

Periodic Calibrations

To Run the Periodic Self-Calibration Program

1. Press TESTS to access the TESTS screen.

2. Select the field to the right of the colon under Procedure .

3. Select ROM under the Choices: menu.

4. Select the field to the left of the colon under Procedure .

5. Select PER_CAL under the Choices: menu.

6. Select RUN TEST .

7. Follow the instructions on the screen.

7-5


Sum Loop Adjustment Procedure

NOTE


This procedure should be performed whenever Step Loop A Assembly (A26) or Sum

Loop Assembly (A25) is replaced. It is not necessary to perform this adjustment for a periodic calibration.

A spectrum analyzer is required to measure the instrument’s output during these procedures. It is recommended to use a synthesized spectrum analyzer if possible.

Procedure:

1. Turn off the HP/Agilent 8922.

2. Remove the instrument top cover and the DAC/Upconverter Module (A27). (It is necessary to remove the RF Cover plate that holds the module in the instrument.)

3. Power up the instrument, select the RF GENERATOR/RF ANALYZER screen, and set the RF Gen Amplitude to

−

20 dBm at the RF IN/OUT connector.

4. Prepare the spectrum analyzer. Set the reference level to

−

10 dBm. Connect the HP/

Agilent 8922 RF IN/OUT to the spectrum analyzer input.

First Adjustment

5. Again from the RF GENERATOR screen, set the HP/Agilent 8922 frequency to 800

MHz.

6. Set the spectrum analyzer center frequency to 786.6 MHz. (The output from the HP/

Agilent 8922 is 13.4 MHz lower than was entered because the DAC/Upconverter is gone).

7. Set the spectrum analyzer span to 10 MHz per division. ADJUST R32 “OFFSET” on top of Sum Loop (A25) until the signal on the spectrum analyzer is between 776.6 and

796.6 MHz.

8. Reduce the spectrum analyzer span to 1 MHz per division and adjust R32 again until the signal on the spectrum analyzer is centered within 2 divisions (2 MHz).

Some modules (prefix 3050A and lower) only need to be centered within 10 MHz for all of these adjustments.

7-6



Second Adjustment

9. Now set the HP/Agilent 8922 frequency to 502 MHz.

10. Set the spectrum analyzer center frequency to 488.6 MHz with a span of 10 MHz per division.

11. Adjust R180 “GAIN” on top of Sum Loop (A25) until the signal on the spectrum analyzer is centered within 10 MHz.

12. Reduce the spectrum analyzer span to 1 MHz per division, and adjust R180 again until the signal on the spectrum analyzer is centered within 2 divisions (2 MHz).

Final Adjustment

13. Set the HP/Agilent 8922 frequency to 1000 MHz.

14. Set the spectrum analyzer frequency to 986.6 MHz, then set the span to 10 MHz per division.

15. Adjust R160 “KNEE GAIN” on top of Sum Loop (A25) until the signal on the spectrum analyzer is centered within 1 division (10 MHz).

16. Reduce the spectrum analyzer span to 1 MHz per division, then adjust R160 again until the signal on the spectrum analyzer is centered within 2 divisions (2 MHz).

Final Check

17. Repeat the above procedures until all three adjustments pass without any further fine tuning.

18. Turn the instrument power off and reinstall the DAC/Upconverter Module. The adjustment is now complete.

7-7




7-8

8

Assembly and Disassembly Procedures

8-1

Assembly and Disassembly Procedures

Introduction

CAUTION

Introduction

Removing and replacing assemblies is straightforward. This chapter contains tool lists, hints and drawings to help you do it effectively. Detailed step-by-step procedures are not given for all assemblies.

After replacing certain assemblies you will need to load new calibration data into the HP/

Agilent 8922 or perform adjustments. The calibration data is supplied on a Memory Card that is included with the replacement assembly.

Refer to chapter 9, “Replacing a Part”, for information about adjustments that are required after replacing certain assemblies.

Perform the following procedures only at a static safe work station. The printed circuit assemblies in this instrument are very sensitive to STATIC ELECTRICITY DAMAGE.

Wear an anti-static wrist strap that is connected to earth ground.

Recommended Torque

1. Screws: Tighten until just snug.

2. RF connectors (SMC SMA): 62 N-cm (5.5 lb-in.)

3. Nuts holding semi-rigid coax: 51 N-cm (4.5 lb-in.)

Further Information

For further information, refer to chapter 9. This chapter contains more information about:

• Part numbers for replaceable parts.

• Ordering information.

• Adjustments required after assemblies are replaced.

8-2


Top and Bottom Cover Removal

Top and Bottom Cover Removal

1. Remove four 2-pt. Pozidriv top bumper mounting screws.

2. Remove four 2-pt. Pozidriv side mounting screws and bumpers.

3. Remove four 2-pt. Pozidriv screws and standoffs.

4. Remove fourteen TX-10 screws and top cover.

5. Remove two TX-10 screws and bottom foot.

6. Remove two TX-15 screws and bottom cover.

Tools Required

• TX-15 screw driver


• 2-pt. Pozidriv screw driver

SIDE VIEW

1

3

To remove covers, pull sides slightly apart, slide them back a few inches and lift off.

2

(Both Sides)

4

(Both Sides)

6

(Both Sides)

8-3


Inside Protective Covers

493-

498

506-

521

499-

501

Washer

502-

504

Nut

Inside Protective Covers

All covers can be removed with a TX-15 screw driver. Screws shown circled only require loosening.

492 Top Cover (B, E and G)

505 Bottom Plate (B,E and G)

252

240 GPIB

Mounting

Bracket and

241-242

Screws

244

458

(Opt. 001)

114 Regular

Mounting

Bracket and

115-118

Screws

(Not Shown)

416-

421,

427-

456

424

3

8-4

12 CRT Bracket 426


AF, Digital and RF Assemblies Removal


A16

A18

A17

A14

A27

A28

A25

A13

A15

A11

A20

A19

A32

A2 A3 A4 A5 A6 A9 A8 A7 A33 A34, (A,G)

A37 (B)

A31, (G)

A36, (B)

8-5



This can only be done once the top cover and inside protective covers have been removed.

RELEASE LEVERS

PULL

RING

CAUTION Before pulling ring on the A8 Memory Board loosen the securing screw.

8-6

Use a TX-10 Torx head screwdriver to loosen.


A1 Front Panel Removal

NOTE


Done with top, bottom, and inside protective covers removed.

Removing Modules

1. Remove RF cover.

2. Remove RF modules.

Disconnecting Cables

3. Disconnect RF cable on mixer assembly. (1/4-inch SMA connector)

4. Disconnect cable from connector J77 on motherboard.

5. Disconnect top cable from pulse switch.



8. Disconnect ribbon cable from front panel.

Detaching Front Panel

9. Remove TX-15 top CRT mounting screw.

10. Remove 2 TX-15 side CRT mounting screws.

11. Remove 8 TX-10 front panel mounting screws. (both sides)

Steps 12 and 13 are necessary only when complete removal of the front panel is desired.

Most repairs can be made without completing these steps.

12. Remove 15 5/8-inch hex nuts.

13. Pull front panel assembly away from chassis until speaker assembly is visible. Remove

3 TX-10 mounting screws and disconnect the speaker cable from J7 on motherboard.

Tools Required



• 2-pt. Pozidriv

• 5/8-inch wrench

• 1/4-inch wrench

8-7



(A1 Mounting Screws)

7-11

47 35

A1

6

(Trim)

548

27-30

546

(Trim)

38-43,

45, 46,

65

34

W31

Power

Switch 70 J1

37

32 33

36

48

31

(Nut under

volume knob)

1

(Panel

Dress)

2

(Frame)

RFI Gaskets

Top 532

Bottom 533

Right Side 528, 529

Left Side 530,531

49-52,

54-63,

66

547

(Trim)

8-8


A10 Power Supply Regulator Removal

A10 Power Supply Regulator Removal

Done with top cover removed.

1. Remove Digital cover.

2. Remove A33 Hop Controller to expose A10 screw.

3. Loosen TX-15 screw.

4. Disconnect attached cable and remove power regulator.

Tools Required



• 1/4-inch wrench

TOP VIEW

2

3

1

8-9


A11 Receiver Mixer Removal



1. Remove RF cover.

2. Remove at least three RF modules.

3. Remove three TX-10 screws.

4. Disconnect all cables and remove the A11 Receiver Mixer assembly.

Tools Required



• 1/4-inch wrench

8-10

SIDE VIEW

MIXER



1

TOP VIEW

2

3

8-11


A12 Pulse Attenuator Removal



1. Remove RF cover.

2. Remove at least three RF modules.

3. Remove two TX-10 screws.

4. Disconnect all cables and remove A12.

Tools Required


• TX-10 screwdriver

• 1/4-inch wrench

8-12

PULSE

SWITCH

SIDE VIEW



1

TOP VIEW

2

3

8-13


A21 GPIB Interface Removal



1. Remove four TX-15 power supply cover screws.

2. Remove two 7mm bolts.

3. Remove one TX-10 screws.

4. Disconnect ribbon cable.

Tools Required



• 7mm wrench

8-14

2

3

4

TOP VIEW

1



8-15


A22 Display Removal

NOTE


Done with instrument top and bottom covers removed.

1. Do steps 1 through 11 of the A1 Front Panel removal instructions.

The front panel assembly must be separated from the main chassis. Considerable pulling force is required to pull the front panel from the chassis.

2. Disconnect RF cable. (5/16-inch SMC connector.)

3. Remove front bezel. (Slide a flat-blade screw driver under the left bottom corner of the bezel and pry it forward until it pops loose.)

4. Remove four TX-15 front panel mounting screws.

5. Remove two 5/18-inch hex nuts.

6. Pull the CRT assembly and the front panel apart. (Be careful not to damage RF cabling.)

7. Remove four TX-15 CRT bracket mounting screws.

8. Loosen two TX-15 input mounting screws.

9. Slide the monitor out of the CRT shield.

Tools Required



• 2-pt. Pozidriv

• 5/8-inch wrench

• 1/4-inch wrench

• 5/16-inch wrench

• flat blade screw driver

8-16

3

4

(4 places)

CRT SIDE VIEW

5

7

8

6



CRT

2

8-17


A23 Input Section Removal

NOTE

A23 Input Section Removal

Done with instrument top and bottom cover removed.



2. Remove two 5/8-inch hex nuts.

3. Remove two TX-15 side mounting screws.

4. Remove one TX-15 bottom mounting screw.

5. Disconnect all cabling and remove input section assembly.

Tools Required



• 2-pt. Pozidriv

• 5/8-inch wrench

• 1/4-inch wrench

FRONT PANEL

AND SIDE VIEW

A22 Display

RIBBON

CABLE

1/4" SMC CONNECTOR

1/4" SMC

CONNECTOR

2

(2 places)

4

BOTTOM VIEW

3

8-18


A24 Attenuator Removal

NOTE

A24 Attenuator Removal

Done with instrument top and bottom covers removed.



2. Remove two TX-15 attenuator mounting screws.

3. Disconnect two RF cables. (5/16-inch SMA connectors.)

4. Push the top of the attenuator firmly away from the CRT until it becomes free.

Tools Required



• 2-pt. Pozidriv

• 5/8-inch wrench

• 1/4-inch wrench

• 5/16-inch wrench

2

3 (5/16" SMA)

4

8-19


A28 Power Supply Removal


Done with instruments top and bottom covers removed.

1. Remove power supply cover.

2. Remove standard plate. If installed remove option 001.

3. Remove five TX-10 screws that attach power supply board to the main chassis.

4. Remove the eight 2-pt. Pozidriv rear panel mounting screws (four on each side).

5. Remove the four TX-10 transformer mounting screws.

6. Remove the eight TX-10 connector plate mounting screws.

7. Disconnect cables from connectors J1 and J2.

8. Carefully slide power supply away from instrument.

Tools Required



• 2-pt. Pozidriv

2

1

3

8-20

TOP VIEW BOTTOM VIEW



8-21


Fan Removal

Fan Removal


1. Remove four TX-15 power supply cover screws and remove cover.

2. Remove four 2-pt. fan mounting Pozidriv screws.

3. Disconnect cable and remove fan.

Tools Required


• 2-pt. Pozidriv

8-22


Fan Removal

8-23


Transformer Removal

Transformer Removal

Done with top and bottom covers removed.

1. Do steps 1 through 8 of the A28 Power Supply Removal instructions.

2. Disconnect cables and remove transformer using illustration below.

Tools Required


• 2-pt. Pozidriv

• Soldering equipment

• TX-10 screwdriver

8-24

9

Replacing a Part

9-1

Replacing a Part

Introduction

Table 9-1

Introduction

To order parts contact your local Agilent Technologies Sales and Service office.

Assembly Replacements

For most parts, you can either order a new assembly or an exchange assembly. Exchange assemblies are factory-repaired, inspected, and tested. If you order an exchange assembly you must return the defective assembly for credit.

With some assemblies you will receive a Memory Card that contains factory-generated calibration data for the assembly. There will also be an instruction sheet for loading the calibration data into the instrument after you replace the defective assembly. With exchange assemblies, you must return the Memory Card with the defective assembly to receive full credit.

Adjustments after Replacing Assemblies

The following table shows which adjustments should be performed after replacing assemblies. The adjustments and calibrations are described in chapter 8, “Assembly/

Disassembly”.

Adjustments After Replacement

A15

A19

A25

A26

Assembly

Replaced

A3

A4

Calibration or Adjustment

Required

Periodic Self Cal

Periodic Self Cal

Timebase Adjustment (standard)

Periodic Self Cal

Sum Loop Adjustment

Step Loop Adjustment

9-2

Replacing a Part

Replaceable Parts


The following tables and figures list part numbers for replaceable parts. For more information or details of replaceable parts, contact your local Agilent Technologies Sales and Service Office.

9-3

Replacing a Part


Table 9-2

2

6

1

1

W31

W31

1

6

7-11


Item

A1

J1

Agilent Part

Number

08920-60201

1250-1811

08922-61037

08922-61085

08922-00009

08922-00079

08922-00053

08922-21002

08922-40002

08922-40003

0515-2126

27-30

31

32,33

34

35

36

37 08920-21023

47

47

47

47

48

38-43,

45,46,65

0515-1940

47

47

47

47

08922-00041

08922-00042

08922-00080

08922-00082

08922-00038

08922-00083

08922-00086

08922-00085

0370-1001

49-52,

54-63,

66

70

2950-0035

5041-0944

546-547 5001-0540

548

0515-0380

2950-0196

2950-0054

08922-00056

08922-40001

0370-2110

5041-8802

6

7

3

2

2

0

2

3

4

8

1

1

8

1

1

1

C

D

3

5

8

6

2

2

1

4

2

8

1

1

1

1

5

Qty. Description

1

1

1

1

1

1

1

1

1

BD AY KEY

ADAPT FN F SMA (CONN, TP N)

Mfr. Code Mfr.Part

Number

28480 08920-60201

00000 ORDER BY

DESCRIPTION

08922-61037 SWITCH/SPKR HARNESS ASSY (G/H/M Only) 28480

SWITCH/SPKR HARNESS ASSY (E/F/S Only)

PANEL DRESS (A/B Only)

28480

28480

PANEL DRESS (E/F/S Only)

PANEL DRESS (G/H/M Only)

MACH FRAME (FRONT DIE)

KEY PAD (A/B Only)

28480

28480

28480

28480

08922-61085

08922-00009

08922-90079

08922-00053

08922-21001

08922-40002

KEY PAD (E/F/G/H/M/S Only)

SMM3.0 6SEMPNTX

28480

28480

4

1

SMM4.0 10SEMPNTX

NUT HEX 1/4-36

00000

00000

08922-40003

ORDER BY

DESCRIPTION

ORDER BY

DESCRIPTION

ORDER BY

DESCRIPTION

2 NUT HEX 1/2-28 THD 00000

1

9

6

6

1

6

1

1

5

1

1

15

CLIP WINDOW

BEZEL - CRT

KNOB BASE .250 JG

CRT WINDOW

SMM2.5 6PCHPNTX

NAME PLATE (A Only)

NAME PLATE (B Only)

NAME PLATE (E Only)

NAME PLATE (F Only)

NAME PLATE (G Only)

NAME PLATE (H Only)

NAME PLATE (M Only)

NAME PLATE (S Only)

KNOB RND .125 GY

NUT-HEX 15/32-32 THD.

28480

28480

00000

00000

00000

28480

28480

28480

28480

28480

28480

28480

28480

00000

00000

ORDER BY

DESCRIPTION

08922-00056

08922-40001

ORDER BY

DESCRIPTION

ORDER BY

DESCRIPTION

ORDER BY

DESCRIPTION

08922-00041

08922-00042

08922-00080

08922-00082

08922-00038

08922-00083

08922-00086

08922-00085

ORDER BY

DESCRIPTION

ORDER BY

DESCRIPTION

4 1

2 2

9 1

KEY CAP “POWER”

TRIM SIDE, 177H

TRIM, TOP FM

00000

00000

00000

ORDER BY

DESCRIPTION

ORDER BY

DESCRIPTION

ORDER BY

DESCRIPTION

9-4

Replacing a Part


(A1 Mounting Screws)

7-11

47 35

A1

6

(Trim)

548

27-30

546

(Trim)

38-43,

45, 46,

65

34

W31

Power

Switch 70 J1

37

32 33

36

48

31

(Nut under

volume knob)

1

(Panel

Dress)

2

(Frame)

RFI Gaskets

Top 532

Bottom 533

Right Side 528, 529

Left Side 530,531

49-52,

54-63,

66

547

(Trim)

9-5

Replacing a Part


Table 9-3 Replaceable Parts

Item

A2

A3

A4

Agilent Part

Number

C D Qty.

08920-60212 7 1

Description

AUDIO ANALYZER 2 (Order 08920-61812)

08920-60171 6

08920-60209 1

1

1

AUDIO ANALYZER 1

MODULATION DISTRIBUTION (Order 08920-61809)

Mfr.

Code

Mfr.Part

Number

A8

A8

A8

A8

A8

A8

A8

08922-60156

08922-60163 9

08922-60158 2

08922-60165 2

08922-60166 2

08920-60279

08922-60175

1

1

1

1

1

1

1

8922A/B MEMORY (Order 08922-60175)

8922E MEMORY (Order 08922-60175)

8922G MEMORY (Order 08922-60175)

8922F MEMORY (Order 08922-60175)

8922H MEMORY (Order 08922-60279)

8922H/S/M MEMORY Without EPROM’s

8922A/E/F/G MEMORY BOARD Without EPROM’s

28480 08920-60209

A5

A6

A7

08922-60105 9

08920-60208 2

08920-60307 0

1

1

1

PREMOD FILTER / NSM BOARD

SIGNAL SOURCE/ANALY (Order 08920-61849)

CONTROLLER (DCU) (A,B,E,F,G) (Order 08922-61811)

28480 08922-60105

A7

A7

A7

08920-60395 5

08920-60395 5

08920-60395 5

1

1

1

CONTROLLER (DCU) (H) (Order 08922-61812)

CONTROLLER (DCU) (S) (Order 08922-61813)

CONTROLLER (DCU) (M) (Order 08922-61814)

A7U65 08920-87168 Order this BOOT ROM with above DCU (M only)

Note: New HOST Firmware must be downloaded to the Agilent 8922M DCU Assembly by an external controller. Contact your local Agilent Technologies Sales and Service Office for more information

28480

28480

28480

28480

28480

28480

08922-60163

08922-60158

08922-60165

08922-60166

08922-60175

A9

A10

A11

A12

A13

A14

08922-60121 9

08920-60256 8

08922-61007 2

08922-61044 7

08920-61031 0

08922-61023 2

1

1

1

1

1

1

GLOBAL TEST/DEMOD BOARD (A,B,E,F,G,H,M,S)

POWER SUPPLY REGULATOR (Order 08920-61856)

RECEIVER MIXER (Order 08922-61807)

PULSE ATTENUATOR (Order 08922-61844)

OUTPUT (Order 08920-61831)

GSM TIMING GEN / PULSE DRIVER

28480 08922-60121

28480 08922-61023

9-6

Replacing a Part


9-7

Replacing a Part



Item Agilent Part

Number

C

D


A15 08922-61019 6 1 MOD-PCB REF SECTION

Mfr.

Code

Mfr.Part

Number

28480 08922-61019

A16 08922-61004 9 1

A17 08922-61013 0 1

RECEIVER (Order 08922-61804)

STEP LOOP B MOD

A18 08922-61045 8 1

A18 08922-61845 6 1

A18 08922-69845 6 2

SPECTRUM ANALYZER (Order Replacement Below)

SPECTRUM ANALYZER Replacement (New)

SPECTRUM ANALYZER Replacement (Exchange)

A19 08920-60331 0 1 MEASUREMENT BD (Order 08920-61836)

A20 08920-60224 1 1 CRT DRIVER (New A/B/E/G Only)

28480 08922-61013

28480 08922-61845

28480 08922-69845

A20 08920-60192 2 1

A21 08922-60259 3 1

A22 08920-61005 8 1

44 08922-00096 6 1

CRT DRIVER (New F/H/M/S Only)

GPIB INTERFACE

DISPLAY Assembly

CRT SHIELD

A23 08922-61001 6 1

A23 08922-61801 4 1

A23 08922-69001 2 1

A23 08922-61133 6 1

A23 08922-61897 4 1

A23 08922-69097 4 1

INPUT SECTION (Order Replacement Below) (A,B,E,G,F,H)

INPUT SECTION Replacement (New) (A,B,E,G,F,H)

INPUT SECTION Replacement(Exchange) (A,B,E,G,F,H)

INPUT SECTION (Order Replacement Below) (M,S)

INPUT SECTION Replacement (New)(M,S)

INPUT SECTION Exchange (M,S)

28480 08922-61859

28480 08920-61005

28480 08922-00096

28480 08922-61801

28480 08922-69001

28480 08922-61801

28480 08922-61801

A24 08920-61010 5 1

A24 08920-61810 3 1

A24 08920-69010 2 1

High Power

Attn. for:

A24 08922-61101 2 1

A24 08922-61808 2 1

A24 08922-69101 2 1

Low Power

Attn. for:

HIGH POWER ATTENUATOR (Order Replacement Below)

HIGH POWER ATTENUATOR Replacement (New)

HIGH POWER ATTENUATOR Replacement (Exchange)

A, B, E, G, G option R10, G option R11

28480 08920-61810

28480 08920-69010

8dB LOW POWER ATTENUATOR (Order Replacement Below)

8dB LOW POWER ATTENUATOR Replacement (New)

8dB LOW POWER ATTENUATOR Replacement (Exchange)

E option R71, E option R73, G option R72, G option R74, F, H, M, S

28480 08922-61101

28480 08922-61808

28480 08922-69101

A25 08922-61010 7 1

A26 08922-61013 0 1

A27 08922-61006 1 1

SUM LOOP (Refer to ADJUSTMENT, Chapter 7)

STEP LOOP A (Refer to ADJUSTMENT, Chapter 7)

DAC/UPCONVERTER

28480 08922-61010

28480 08922-61013

28480 08922-61006

9-8

Replacing a Part


9-9

Replacing a Part



C D Qty. Description Item Agilent Part

Number

A28 08922-61043

08645-60132

08645-60133

0515-1860

08645-60134

08645-61155

08645-61122

08922-60141

0515-1137

0515-1851

0515-1960

0590-1794

2110-0010

2190-0584

2190-0585

2190-0586

2360-0229

3050-0686

3050-0892

9100-4757

08645-21005

08645-21031

08645-21032

0

1

2

9

4

6

3

9

7

6

5

0

6

6

7

2

3

5

0

8

8

2

1

8

4

4

1

2

4

1

8

1

1

4

1

1

1

1

8

4

1

1

8

4

4

4

Mfr. Code Mfr.Part Number

POWER SUPPLY

BD AY-PWR S STBD

BD AY-FUSE

28480

28480

28480

SCREW 1.5FM 3.5 TX 00000

BD AY-PWR Q PORT 28480

FAN ASSY 2 CKT 28480

PWR LN MDL ASSY 28480

BD AY-POWER SPLY 28480

SMM3.0 50 PN TX 00000

SMM3.0 6SEMPTX

SMM4.0127 PN TX

00000

00000

NUT-SHMET U 6-32

FUSE 5A 250V F

WSHR-LK HLCL

WSHR LK 3.5ID

00000

00000

00000

00000

WSHR LK M4.OID

SM 632 .562PNPD

WSHR FL .156ID 6

WSHR FL M3.5 ID

00000

00000

00000

00000

XFMR PWR100/240V 00000

PANEL REAR MCHND 28480

WSHR-SHLDR, INSUL 28480

WSHR-SHLDR, INSUL 28480

08922-61043

08645-60132

08645-60133

ORDER BY DESCRIPTION

08645-60134

08645-61115

08645-61122

08922-60141













08645-21005

08645-21031

08645-21032

9-10

Replacing a Part


9-11

Replacing a Part


Table 9-6

A31

A32

A32

A32

A32



Number

C

D


08922-60247 9 1 MGSM / CODEC (E/F/G/H/M/S Only)

08922-60146 8 1

08922-60162 8 1

08922-60167 8 1

08922-60176 8 1

GSM CONTROLLER (Order 08922-60176)



GSM CONTROLLER Without EPROMS

A33 08922-60202 7 1 HOP CONTROLLER

A34

A34

08922-60142 4 1

08922-60244 6 1

RTI BYPASS 8922 (A Only)

GSM RTI 8922 (E/F/G/H/M/S Only)

A35

A35

08922-60160 6 1

08922-60152 6 1

PROTOCOL INTERFACE (G/H Opt 003 Only)

”B” REFERENCE (B Only)

A36

A37

A38

08922-60154 8 1

08922-60151 5 1

08645-60137 1 1

457

458

08922-00017

08922-00018

459,460 2360-0195

6

7

0

1

1

2

461 2190-0102 8 1

462 2950-0035 8 1

W27 08922-61056 1 1

W100 08645-61089 4 1

Y1 10811D 4 1

FIFO GPIO 8922B (B Only)

SEQ CONTROLLER (B Only)

BD-AY-TIMEBASE (Opt.001 Only)

BRACKET-TIMEBASE

COVER-TIMEBASE

SM 632 .312PNPD

WSHR LK .472ID

NUT-HEX 15/32-32

CX F SMC-BNC (CABLE)

CA MCNDCT 6CKT (RIBBON CABLE)

XTAL OSC-10 MHZ

Mfr.

Code

Mfr.Part Number

28480 08922-60147

28480 08922-60146

28480 08922-60162

28480 08922-60167

28480 08922-60167

28480 08922-60202

28480 08922-60142

28480 08922-60144

28480 08922-60160

28480 08922-60152

28480 08922-60154

28480 08922-60151

28480 08645-60137

28480 08922-00017

28480 08922-00018

00000 ORDER BY

DESCRIPTION

00000 ORDER BY

DESCRIPTION

00000 ORDER BY

DESCRIPTION

28480 08922-61056

28480 08645-61089

28480 10811D

9-12

Replacing a Part


9-13

Replacing a Part



W37

W38

W39

W40

W41

W42

W43

W44

W45

W29

W30

W31

W32

W33

W34

W35

W36

W21

W22

W23

W24

W25

W26

W27

W28

W13

W14

W15

W16

W17

W18

W19

W20

W5

W6

W7

W8

W9

W10

W11

W12


Number

A22-W1 08920-61020

W1

W2

W3

W4

08920-61012

08922-61028

08920-61016

08920-61013

08922-61027

08922-61033

08922-61035

08922-61036

08922-61034

08922-61024

08922-61016

08922-61018

08922-61026

08922-61017

08922-61020

08922-61025

08922-61022

08922-61021

08922-61015

08922-61032

08922-61008

08922-61014

08922-61031

08922-61009

08922-61029

08922-61030

08922-61056

08922-61057

08922-61059

08922-61058

08922-61037

08922-61061

08922-61055

08922-61041

08922-61040

08922-61054

08922-61039

08922-61060

08922-61005

08922-61067

08922-61068

08922-61069

08922-61051

08922-61052

08922-61053

C D Qty. Description

4

3

1

2

8

1

2

4

3

1

2

3

1

0

9

4

5

4

6

5

5

3

6

5

6

4

1

8

7

7

7

6

7

8

5

6

0

4

0

7

3

9

0

4

8

8

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

CABLE (RIBBON) CRT-MBOARD

CABLE RF OUT ATTEN

CABLE M-BD J14 TO SCOPE IN

CABLE (RIBBON) INPUT CONTROL

CABLE ATTEN INPUT/HEATSINK

CABLE M-BD J11 TO MOD AM

CABLE M-BD J58 TO MOD DATA

CABLE MBD J83 TO MEAS TRIG

CABLE M-BD J84 TO MOD PL5

CABLE M-BD J59 TO MOD CLK

CABLE M-BD J2 TO AUD IN H

FM DEMOD CABLE

DEMOD DATA CABLE

CABLE M-BD J3 TO AUD IN L

PULSE DEMOD CABLE

DEMOD CLOCK CABLE

CABLE M-BD J4 TO AUD OUT

MONITOR CABLE

DEMOD VALID CABLE

CABLE M-BD J61 TO 10M OUT

CABLE M-BD J85 TO AM IN

CABLE M-BD J63 TO E LO OUT

CABLE M-BD J62 TO 13M OUT

CABLE M-BD J78 TO MONITOR

CABLE M-BD J60 TO REF IN

CABLE M-BD J68 TO AUX IF

CABLE M-BD J64 TO VIDEO

CABLE SMC TO BNC OPT. 001

CABLE SMC TO BNC

CABLE SMC TO SMC

CABLE SMC TO SMC 8

SPEAKER HARNESS ASSY

RIBBON CBL 26 CONDUCTOR


SR CABLE PULSE TO OUT

SR CABLE M-BD TO PULSE

POWER SUPPLY CABLE



POWER SUPPLY CABLE ASSY

COAX SMC-BNC (B Only)

COAX SMC-BNX (B Only)

COAX SMC-BNC (B Only)

RIBBON CABLE 50 CND (B Only)

B REF RIBBON 16 CND (B Only)

COAX SMC-SMC (B Only)

Mfr.

Code

Mfr.Part Number

28480 08920-61020

28480 08920-61012

28480 08922-61028

28480 08920-61016

28480 08920-61013

28480 08922-61027

28480 08922-61033

28480 08922-61035

28480 08922-61036

28480 08922-61034

28480 08922-61024

28480 08922-61016

28480 08922-61018

28480 08922-61026

28480 08922-61017

28480 08922-61020

28480 08922-61025

28480 08922-61022

28480 08922-61021

28480 08922-61015

28480 08922-61032

28480 08922-61008

28480 08922-61014

28480 08922-61031

28480 08922-61009

28480 08922-61029

28480 08922-61030

28480 08922-61056

28480 08922-61057

28480 08922-61059

28480 08922-61058

28480 08922-61037

28480 08922-61061

28480 08922-61055

28480 08922-61041

28480 08922-61040

28480 08922-61054

28480 08922-61039

28480 08922-61060

28480 08922-61005

28480 08922-61067

28480 08922-61068

28480 08922-61069

28480 08922-61051

28480 08922-61052

28480 08922-61053

9-14

Replacing a Part


Table 9-7

W46

W47

W48

W49

W50

W51

W52



Number

08922-61050

08922-61077

08922-61078

08922-61080

08922-61081

08922-61082

08922-61077


1

1

1

1

1

1

1

3

6

1

2

5

6

7

EMMI CABLE (G Only)

RIBBON 16 CND

RIBBON 26 CND

CABLE

CABLE

CABLE SMC TO SMC

RIBBON CABLE 16 CND

Mfr.

Code

Mfr.Part Number

28480 08922-61050

28480 08922-61077

28480 08922-61078

28480 08922-61080

28480 08922-61081

28480 08922-61081

28480 08922-61077

9-15

Replacing a Part


9-16

Replacing a Part


9-17

Replacing a Part




Number

5040-3881 1

3

6

9

11

5060-4475

5001-8663

0515-1114

0535-0023

522 08645-40015

523,524 0515-1860

525 08922-00065

537-540 0515-1232

549-552 5041-8821

554 08922-00066

5041-8801

569-572 0515-1444

573-576 08922-40004

577-580 0515-0419

581-584 0515-0380

585 01650-84502

586-589 0590-0025

589-592 3050-0894

593 5060-4479

595-598 0515-0899

604-605 08922-61076

607 5062-3990

08922-21008

5 4

8 4

2 4

7 1

0 4

0 4

8 1

8 4

5 2

0 1

5 2

2 1

5 2

4 1

5 4

2 4

5 1

8 4

1 4

C

D


2 1 TOP FLANGE

4 2

6 1

2 4

2 1

SIDE FLANGE

INTERNAL LID

SCREW (M4X10)

NUT + HEX DBL-CHAN

FOOT-REAR

SCREW 1.5 FM 3.5TX

COVER BOTTOM

SCREW, MM 3.5 X 6.8 MM

STNDOFF-REAR PNL

TOP COVER

FOOT FULL MOD

SCR-MACH 3.5 X .60

BUMPER

SMM5.0 16PN P2

SMM4.0 10SEMPNTX

POUCH ACCESORY

NUT HEX

WSHR FL MS.OID

COVER-ASSY KIT

SMM4.0 20PL PNPD

Order 08922-21008

FRONT HANDLE KIT

HANDLE ASSY (Option 002)

Mfr.

Code

Mfr.Part Number

00000 ORDER BY DESCRIPTION





28480 08645-40015


28480 08922-00065



28480 08922-00066



28480 08922-40004



00000 ORDER BY DESRIPTION





28480 08922-61076


28480 08922-61076

9-18

Replacing a Part


9-19

Replacing a Part




Number

08922-61011 3

12

114

08922-00004

08922-00030

115-117 0515-1950

118 0515-0380

240 08922-00028

241,242 0515-1950

244

252

08922-00055

08922-00007

416-421 0515-0380

424 08922-00032

425

426

08922-00015

08922-00031

427-456 0515-0380

458 08922-00018

492

492

08922-00044

08922-00072

493-498 0515-1950

499-501 2190-0124

502-504 2950-0078

505 08922-00043

506-521 0515-1950


2

7

4

4

2

5

2

4

9

4

4

2

8

1

3

9

8

4

4

4

9

3

1

2

3

1

1

1

1

AY-FRAME, (CHASSIS).

CRT BRACKET

BRACKET-REG, PCA

SCREW MACH M3 X .5

SMM4.0 10SEMPNTX

BRACKET HP-IB

SCREW M3 X .5

6

1

1

1

PLATE STANDARD

COVER, POWER SUPPLY

SMM4.0 10SEMPNTX

RF COVER

1

1

COVER, AIR DIGITAL

COVER-AIR,AUDIO

29 SMM4.0 10SEMPNTX

1 TIMEBASE COVER (Opt. 001)

6

3

1

1

COVER (B Only)

COVER (G/H Opt. 003 Only)

SCREW MACH M3 X .5

WSHR-LK .1941D

3

1

NUT-HEX 10-32

PLATE

15 SCREW MACH M3 X .5


28480

28480

00000

28480

28480

28480

00000

28480

28480

28480

28480

00000

00000

28480

00000

28480

28480

00000

00000

00000

28480

00000

08922-61011

08922-00004

08922-00030



08922-00028


08922-00055

08922-00007


08922-00032

08922-00015

08922-00031


08922-00018

08922-00044

08922-00072




08922-00043


9-20

Replacing a Part


493-

498

506-

521

499-

501

Washer

502-

504

Nut

416-

421,

427-

456

424

3

492 Top Cover (B, E and G)

505 Bottom Plate (B,E and G)

252

240 GPIB

Mounting

Bracket and

241-242

Screws

244

458

(Opt. 001)

114 Regular

Mounting

Bracket and

115-118

Screws

(Not Shown)

12 CRT Bracket 426

9-21

Replacing a Part



Item

21

Agilent Part

Number

0515-0456

91-95 0515-1860

96-100 3050-0227

119

120

08922-00014

08922-00022

121 08922-00050

122-153 0515-0380

196-201 0515-0380


3

7

2

3

3

5

3

2

1

1

5

SMM4.0 20MML

SCREW 1.5 FM 3.5 TX

WASHER .375 OD

1

1

RF COVER (ON MOTHERBOARD)

MBD COVER-DGTL

1 COVER-MTHR, SYS BUS

32 SMM4.010SEMPNTX

6 SMM4.010SEMPNTX


00000

00000

00000

28480

28480

28480

00000

00000

ORDER BY

DESCRIPTION

ORDER BY

DESCRIPTION

ORDER BY

DESCRIPTION

08922-00014

08922-00022

08922-00050

ORDER BY

DESCRIPTION

ORDER BY

DESCRIPTION

9-22

Replacing a Part


9-23

Replacing a Part




Number

22,23, 112,113 0515-0380

24,25 0515-2126

83-86, 104-107 0515-1331

87-90

268-270

560

0515-1860

0515-1950

0515-0380


2

8

5

5

3

2

4

2

8

4

4

1

SMM4.0 10SEMPNTX

SMM3.0 6SEMPNTX

SCREW M4 X 6

SCREW 1.5 FM 3.5 TX

SCREW M3 X .5

SMM4.0 10SEMPNTX


00000

00000

00000

00000

00000

00000







9-24

Replacing a Part




Number

79-82, 108-111 0515-1331

203,204

561

0515-0380

0515-0380


1

2

2

8

2

1

SCREW M4 X 6


00000

SMM4.0 10SEMPNTX 00000

SMM4.0 10SEMPNTX 00000




9-25

Replacing a Part



Item

209

Agilent Part

Number

08922-00005

C

D


2 1

Serial Prefix 3216A and Below

PLATE REAR PANEL (A Only)

Mfr.

Code

Mfr.Part Number

28480 08922-00005

209 08922-00073 4 1

Serial Prefix 3217A and Above

PLATE REAR PANEL (A Only) 28480 08922-00073

211,212

213-221

222-230

231-237, 239,243 0515-1950

245-246

247,249

461

462

482

482

483,485

486-488

489

541

541

0380-2079

2950-0035

2190-0102

0380-0644

2190-0577

2190-0102

2950-00035

3

8 9

8 9

4

4

4

8

2

9

2

2

1

8 1

08922-00048 3 1

08922-00074 5 1

2190-0102

2950-0035

1251-0218

8

8

6

2

3

1

08922-00075 6 1

08922-00049 4 1

CONN SCREWLOCK

NUT-HEX (A/G Only)

WASHER LK.

00000 ORDER BY

DESCRIPTION

00000 ORDER BY

DESCRIPTION

00000 ORDER BY

DESCRIPTION

SCREW M3 X .5

00000 ORDER BY

DESCRIPTION

STANDOFF, METRIC (For G/H Opt.003 Only) 00000 ORDER BY

DESCRIPTION

WSHR LK .1941D

WASHER LK.(A/G/H Only)

00000 ORDER BY

DESCRIPTION

00000 ORDER BY

DESCRIPTION

NUT HEX (A/G/H Only) 00000 ORDER BY

DESCRIPTION


PLATE-REAR PANEL (B Only)

Serial Prefix 3217A and Above

PLATE-REAR PANEL (B Only)

WASHER LK (A/G/H Only)

28480 08922-00048

NUT-HEX

POST CONNECTOR, LOCK (B Only)

28480 08922-00074

00000 ORDER BY

DESCRIPTION

00000 ORDER BY

DESCRIPTION

00000 ORDER BY

DESCRIPTION


8922E All Prefixes

PLATE REAR PANEL (E/F/G/H/M/S Only)

8922G Prefix 3240A00250 and Above

PLATE REAR PANEL (G Only)

28480

28480

08922-00075

08922-00049

9-26

(

Replacing a Part


9-27

Replacing a Part


Table 9-14 Miscellaneous Replaceable Parts

C D Qty. Description Item Agilent Part

Number

26,205-207 1400-0249

53

64,208

67-69,78

71-77

08590-80007

1400-1391

5041-7250

0400-0112

210

544

544

545

238

534-536

490

491

553

654,661

08920-00063

1400-0249

0400-0112

1400-0611

6960-0132

2110-0083

2110-0055

9230-0260

08642-00138

08922-00076

5180-1871

1

1

1

1

2

9

1

1

1

1

3

4

7

4

1

3

3

7

2

2

2

1

9

5

0

0

0

9

5

0

0

5

CABLE TIE

LBL WARNING-CRT

CLAMP CABLE

CABLE CLIPS

GROMMET, SNAP-IN

CAUTION LABEL

CABLE TIE

GROMMET, SNAP-IN

CLAMP CABLE

PLUG

FUSE 2.5A MED

FUSE 4A MED

ENV VOLT WARNING

LBL-2 PERSONLIFT

PLATE BLOCK

LBL-BLK SERIAL


00000

00000

00000

00000

00000

00000

28480

28480

00000

00000

00000

00000

00000

00000

28480

00000

ORDERBY DESCRIPTION

ORDER BYDESCRIPTION




08920-00063

ORDERBY DESCRIPTION







08642-00138

08922-00076


9-28

Replacing a Part

Firmware Upgrades


In The Agilent 8922M

HOST and GSM Firmware are upgraded using an external controller or Personnal

Computer.

In The HP/Agilent 8922A, B, E, G, F, H, S

The firmware for the HP/Agilent 8922A,B,E,G,F,H,S is grouped in single ROM sets.

These sets are listed below. It is recommended that a complete set is used each time a firmware upgrade needs to be made.

HP Part Number

08922-61087

08922-61088

08922-61089

08922-61116

08922-61117

08922-61149

Description

8922A/B ROM Upgrade

8922E ROM Upgrade

8922G ROM Upgrade

8922F ROM Upgrade

8922H ROM Upgrade

8922S ROM Upgrade

9-29

Replacing a Part



9-30

10

Service Screen

10-1

Service Screen

Introduction

Introduction

This chapter describes the fields on the service screen. The service screen is intended to support component level repair and the features are of greatest use with component level documentation. Component level documentation is beyond the scope of this book and

Agilent Technologies does not currently support component level support for the HP/

Agilent 8922 product family outside of the factory.

1. Voltage

This field displays the voltage measured at the selected voltmeter connection.

2. Frequency

This field displays the frequency measured at the selected counter connection.

3. Voltmeter Connection

This field selects the voltage test point. The voltage will be measured and displayed in the voltage field.

10-2

Service Screen

Introduction

4. Counter Connection

This field selects the frequency test point. The frequency will be counted and displayed in the frequency field.

5. Gate Time

This field selects the gate time used by the frequency counter.

6. Latch

This field selects the data latch to be read or written to.

7. Value

This field displays the present value of the selected latch. This field is also used to set the latch value of writable latches.

8. RAM Initialize

This field clears all RAM memory. RAM memory contains recall registers and test programs.

A quick RAM initialize can be carried out by holding in the LOCAL and Hz keys while powering on the HP/Agilent 8922. Release the keys after the self test beep.

10-3

Service Screen

Introduction


10-4

11

Self-Test Error Messages

11-1

Self-Test Error Messages

Introduction

Introduction

This chapter lists the error messages that appear on the status line of the display and on the message screen when the self-tests are run on power-up. This list does not include all of the messages that can appear under all circumstances.

”Battery Backed RAM Initialized. Structures corrupt.”

”Battery Backed RAM Initialized. Option RAM not maintained.”

”Battery Backed RAM Initialized.Optional RAM not found.”

”Battery Backed RAM Initialized. Standard RAM not maintained.”

”All host processor self-tests passed.”

”PANIC - UNKNOWN ERROR OCCURRED.”

”Attempt to write EEPROM failed.”

”Communication failure with the Rcvr Step Loop Board.”

A serial communications failure occurred with the A17 Step Loop assembly.

”Communication failure with the Sig Gen Step Loop Board.”

A serial communications failure occurred with the A26 Step Loop A assembly.

”Communication failure with the NSM/PMF Board.”

A serial communications failure occurred with the A5 Premod Filter and NSM assembly.

”Hop Controller communication channel Failure.”

”Self-test failure in Hop Controller.”

The A33 Hop Controller assembly failed its self-test.

”Hop Controller did not post self-test results.”

”DSP Analyzer communication Channel Failure.”

”Self-test failure in DSP Analyzer.”

The A9 Global Test and Demod assembly failed its self-test

”DSP Analyzer did not post self-test results.”

”Protocol Processor Communication Channel Failure.”

”Self-test failure in Protocol Processor.”

The A32 GSM Controller assembly failed its self-test.

11-2

12

Module I/O Specifications

12-1

Module I/O Specifications

Introduction

Introduction

This chapter contains tables of module input/output specifications.

These do not include tables for some of the digital boards due to complexity. In most cases it will be quicker to verify digital failures using board swap than to verify through measurement.

This chapter is used with the Using the Service Kit, Instrument Block Diagram and Block

Diagram Theory chapters to verify a specific module or assembly failure when diagnostics and performance tests do not provide a high level of certainty.

12-2

A2 Audio Analyzer 2

Use extender card 08920-60142

Power Supplies

+5 V

+12 V

-12 V

GND (Analog)

GND (Digital)

J1(21,22)

J1(19)

J1(20)

J1(6,7,10,13,14,17,18)

J1(23,24,25,27)

200 mA

80 mA

80 mA

Inputs

From A3 Audio Analyzer 1

AUDIO INPUT MUX

Selected Input — FIL_AUD J1(12)

Input Z

Voltage Range

1 M

Ω

DC Coupled

±

5 Vp

From Modulation Distribution Board

Selected Input — MOD_MON J1(16)

Input Z 100 k

Ω

DC Coupled

From A3 Audio Analyzer 1

DC AUDIO INPUT

DC_AUD J1(15)

Input Z 100 k

Ω

Voltage range

±

5.0 Vp



12-3



Outputs

AUDIO OUT MEAS MUX

To A19 Measurement Board

AUD2_VM J1(11)

Response Time

DC Offset

Selected path = POS/NEG peak detectors. Input = FILT_AUD

Detector Range

< 1 ms (Rise time)

<

±

15 mV

0.424 to 5 V Peak

Selected path = Pre Notch RMS detectors. Input=FILT_AUD

Specified Meas. Range 0.296 to 1.67 V rms

Selected path = Post Notch RMS detectors. Input FILT_AUD

RMS detector settling time Slow (<= 200 Hz) < 673

µ s

Fast (> 200 Hz) < 93

µ s

Specified Meas. Range 0.200 to 1.67 V rms

Gain < 40 dB

0.095 to 1.67 V rms

Gain = 40 dB

3 dB Bandwidth

Notch Attenuation

> 160 kHz 70 dB total Gain

> 40 dB 1 kHz

±

20 Hz

> 65 dB 1 kHz

±

5 Hz

Input Impedance

Selected path = DC_AUDIO Input =FILT_AUD

100 k

Ω

DC Offset 16 mV Over Temp

DC Offset

Available Gain

Selected path = Pre Notch Audio Input = FILT_AUD

<

±

16 mV Over Temp

30 dB

DC Offset

Available Gain

Selected path = Post Notch Audio Input = FILT_AUD

<

±

16 mV Over Temp

70 dB

SPEAKER

Max Output (8

Ω

)

Amp Gain Adjust Range

ALC circuit output level

SPK1 J1(2)

250 mW Input = FILT_AUD

0 to 20

0.25 Vp ALC Mode

12-4




Use extender card 08920-60142.

The Primary function of Audio Analyzers 1 and 2 is to provide oscilloscope functions.

Power Supplies

+5 V

+12 V

-12 V

GND (Analog)

GND (Digital)

J1(21,22)

J1(19)

J1(20)

J1(3,4,8,12,13,17,18)

J1(23,24,26,27)

20 mA

60 mA

60 mA

Inputs

AUDIO INPUT MUX

Input Z

DEMOD_AUD J1(6)

MOD_MON J1(10)

EXT_SCOPE J1(11)

AUX_IN2 J1(5)

DET_LO J1(7)

AUD_IN_HI J1(1)

AUD_IN_LO J1(2)

1 M

Ω

100 k

Ω

= 1 M

Ω

< 65 pF to GND. (Non-

Floating GND input).

Ground AUD_IN_LO

Floating = 1 M

Ω

GND

Maximum Input

(Hardware Limit)

65 pF to GND.

< 200

Ω

12 Vp

9.8 Vp

98 Vp

From A16 Receiver

From Mod Distribution

From Front Panel

From Input Section



DEMOD_AUD, MOD_MON

EXT_SCOPE, AUX_IN2, DET_LO

AUD_IN_HI

DEMOD_AUD, MOD_MON

EXT_SCOPE, AUX_IN2, DET_LO

AUD_IN_HI,AUD_IN_LO

12-5



To Audio Analyzer 2

Outputs

FIL_AUD J1(15)

Output Z < 1

Ω

Unit Gain Opamp

Selected Inputs (DEMOD_AUD,MOD_MON,EXT_SCOPE, AUX_IN2, DET_LO)

Total Path Accuracy 0.02 to 10 kHz

0.02 to 25 kHz

0.02 to 75 kHz

±

0.45 %

±

1.05 %

±

7.7 %

0,20,40 dB, No Filters

DC Offset < 13 mV 0 dB Gain

< 1.3 V 40 dB Gain

THD + Noise < .07% 1 kHz Rate, 15 kHz BW.

Total Path Accuracy

Selected Inputs (AUD_IN_HI,AUD_IN_LO)

.02 to 12 kHz

.02 to 25 kHz

.02 to 75 kHz

±

0.704 %

±

1.3 %

±

7.95 %

-20,0,20 dB, No Filters

3 dB Freq, Thru Path -20 dB

0.0 dB

+20 dB

< 1 Hz and > 200 kHz



12-6




Output Z

DC Offset

Response Time

DC Offset

Specified input range

Accuracy

B.W. (3 dB)

AUD1_VM J1(16)

> 1

Ω

<

±

9 mV

Unity Gain buffer

Selected input =Range/Over-voltage detector

< 1 ms (Rise time)

±

15 mV

.29 to 5 Vp

±

2% 20 Hz to 50kHz

20 Hz to >200 kHz.

Filter 3 dB BW

Step Response (1%)

DC Offset

DC Offset

DC Offset drift

DC path gain accuracy

Selected input = DC Audio Path

2.1 Hz

<400 ms

±

21 mV

±

.1 mV

±

3 mV

Uncalibrated

Calibrated

OverTemperature

To Audio Analyzer 2

DC Offset

DC_AUDIO J1 (14)

Front Panel Input

Other Inputs

±

15 mV

±

6.3 mV

12-7


A4 Modulation Distribution


Use extender card 08920-60141

Power Supplies

+12 V

+5 V

-12 V

GND (Analog)

GND (Digital)

J1(29)

J1(33,34)

J1 (30)

J1(27,28)

J1(35,36,37)

120 mA + Audio Output Drive

12 mA

120 mA + Audio Output Drive

Inputs

From Front Panel BNC input

Input Z

EXT_MOD J1(1)

600

Ω

Max Input Level 15 Vp

Full Scale Input 1 Vp

From A6 Signal Source/Analyzer

AFG1 J1(11), AFG2 J1(13), AFG_GND J1(12)

Input Z

GND Input Z

13.36 k

Ω

46.7 k

Ω

Full Scale Input 3.5 Vp

1.3 V rms

AFG1 and AFG2 are both sine wave signals with the audio frequency set on the RF

Generator page, the attenuation takes place on the modulation distribution board. To obtain a signal for measuring AFG2, select TEST MENU, then AF_diags. From the AF diags submenu, select MODULATION DISTRIBUTION INTERNAL TEST, using single step, stop on test #1. AFG1 will measure at >500 mV rms

and > 1.8 Vp-p

12-8



To Front Panel BNC

Outputs

Output Z

Maximum Output Voltage

Max Output Current

Full Scale Gain (Uncal)

Attenuator Accuracy

AUDIO_OUT_HI J1(7)

< 1

Ω

5 V rms

OpenCircuit

40 mA Peak Hardware spec.

20 mA peak Spur Requirements

5.953

±

1.51% LFS1/2 to FP, DAC=255, 600

Ω

Load.

±

.02 dB (DC) (20,40,60 dB)

The output of AUDIO_OUT_HI can be set on the RF Analyzer page.

AM MOD Ouptut Z

Full Scale output

Uncalibrated Path Gain

Gain (F.P. Input)

Attenuator Accuracy

High Freq roll off

Low Freq roll off

< 400

Ω

AM_MOD J1(20)

Load 100 k

Ω

/4000 pF

4 Vp

2.37

±

1.5% DAC=255, 1 kHz Gain (AFG1 Path)

5.12

±

2.5% DAC=255 , 1 kHz

±

0.02 dB ( 1 kHz) (20 dB)

< 3 dB 150 kHz

< 1 dB 20 Hz AM port EXT AC Standard AM load.

To route the input signal AFG1 to the output AM_MOD, access the SERVICE Screen.

Select the latch ’dstr_mod_destination’ and change the value to any odd number (for example ’3’). Select ’dstr_afg1_to_mod’ and change the value to any even number (for example ’2’) and measure.

Output Z

MOD_MON J1(18)

< 1 k

Ω

MOD_MON can also be accessed using the SERVICE Screen. Use latch

’dstr_monitor_select’.

’2’ signal at un-attenuated values of AFG1.

’3’ use external source connected to ’Modulation_In_AmSpeech’

’4’ signal at levels set up at RF Generator page.

12-9


A5 Premodulation Filter and NSM



Power Supplies

+15 V J1(12) J2(20)

-15 V J1(11) J2(23,24)

+5 V J1(15,16) J2(23,34)

-5 V J1(19)

Ground J1(2-4,6-10,13-14,17-18,20-21,23-40)

J2(2-4,17-18,21-22,25-26,28-32,34-37)

TP 2

TP 3

TP 1

TP 4

TP 5

15 mA

15 mA

1.1 A

5 mA

Inputs

From A34 GSM-RTI Assembly

Level:

Frequency:

PMF_CLK J1(5)

TTL

270.833

±

2 kHz

Clock signal input is a square wave of duty cycle 50% and approximately 4.4Vp-p when measured on an oscilloscope. To view on a spectrum analyzer, set centre frequency to

270 kHz and span to 540 kHz, the peak marker should read approximately +12dBm.

4 Vp-p

12-10



From A34 GSM-RTI Assembly

Level:

Rate:

Format:

PMF_DATA J1(1)

TTL

270.833 kbps

Non-differential data encoded

The PMF_DATA signal is difficult to measure accurately without a high speed oscilloscope or logic analyzer. Using a Spectrum Analyzer, an increased noise floor can be seen when probed about the centre frequency of 270 kHz. Using an oscilloscope, the signal can be measured at 4.4 Vp-p. On a DVM, 2.25 Vdc.

From A15 Reference GSM-RTI Assembly

10 MHz Ref B J2(33)

Frequency: 10 MHz

±

500 Hz

Wave Shape: Sine

Level:

Harmonics:

>10 dBm

<

−

25 dBc

NOTE:

The 10 MHz Reference signal can be measured on an oscilloscope at 880 mV rms

and

2.6 Vp-p. On a Spectrum Analyzer, the marker will be approximately +10dBm.

The Premodulation Filter and NSM assembly are used to convert User Digital Data and clock signals into GMSK.

To A27 DAC/Upconverter

Outputs

Frequency:

Level:

NSM_IF_CLK J2(1)

17.3333 MHz

±

250 Hz

TTL

The NSM_CLK signal can be sensed on the SERVICE Screen using the

’nsm_pmf_clk_pres_int_sense’ latch, a value of 1 for lock and ’0’ for OOL (Out Of Lock) state. An OOL condition can cause high phase and frequency error problems. See

Figure 4-1 on page 12-12 for typical oscilloscope readings. On a Spectrum Analyzer, the peak marker should be >+6 dBm.

12-11



Figure 4-1 Typical Oscilloscope Display

Channel 1 = 500.0 mvolts/div

Timebase = 20.0 ns/div

Ch. 1 Parameters

Rise Time

Frequency

= 13.660 ns

= 17.3310 MHz

+ Width

Overshoot

RMS Volts

= 32.710 ns

= 250.0 mvolts

= 2.343 volts

Offset = 1.810 volts

Delay

P-P Volts

Fall Time

Period

= 0.000 s

= 3.187 volts

= 7.540 ns

= 57.700 ns

- Width

Preshoot

= 24.990 ns

= 187.5 mvolts

Duty Cycle = 56.68%

Trigger mode: Edge on positive edge on Chan1

Trigger Levels

Chan1 = 1.810 volts

Holdoff = 70.000 ns

From A34 RTI Assembly

Serial I/O

Hop Control E/I_NSM J2(38)

CLK_NSM J2(39)

DAT_NSM J2(40)

Levels:

Clock Rate:

TTL

≅

100 kHz (bursted) non-hopping generator

≅

1 MHz (bursted) hopping generator

The HOP CONTROL lines can be measured at +5Vdc

12-12

A6 Signaling Source/Analyzer


Power Supplies

+12 V

+5 V

-12 V

D_Ground

A_Ground

J1(9)

J1(37,39,40)

J1(10)

J1(13,14,31,32)

J1(2,7)

21 mA

650 mA

41 mA

Inputs

From A2 Audio Ananlyzer 2

PROC_AUD J1(11)

Input Impedance 41.6 k

Minimum Input Level

Maximum Input Level

Analyzer timebase

0.2 Vpk

5 Vpk

12 MHz

±

0.01%



12-13



Outputs

To A4 Modulation Distribution Assembly

Freq Range

Freq Resolution

Freq Accuracy

Output level (Max)

Output Lvl Resolution

Output Lvl Acc (Uncal)

Output Channel Clock

Output Impedance

THD+Noise (Sine)

AFG1 J1(3), AFG2 J1(5)

DC to 25 kHz

0.1 Hz

0.01 % of setting

2.5 Vpk

12 Bits (LSB = 5V/4096)

±

0.0183% F.S.

838.8608 kHz

1.336 k

Ω

(680 pF Shunt )

0.10% (Output = 2.5 Vpk)

(Meas BW 80 kHz)

(20 Hz to 25 kHz)

For levels and setting up signals for measuring, see “A4 Modulation Distribution”, page 12-8.

12-14


A9 Global Test and Demod

From A16 Receiver



Power Supplies

+15 V

-15 V

+5 V

-5 V

Ground

J2(29,30) - TP 15

J2(25,26)

J2(23,24)

J2(21,22)

J1(1,33,4,17,18,20)

J3(1-4,6-14,16-20) - TP 14/16

Inputs

140 mA

80 mA

1.0 A

20 mA

Frequency:

Level:

Harmonics:

10.7M_IF J1(7)

10.7 MHz

±

50 kHz

3 dBm

±

1 dB

<- 40 dBc

The 10.7 MHz is orginated from the A16 Receiver. It is down converted to 700 kHz

±

50 kHz within the Global Test and Demod assembly. To obtain a reading either with an oscilloscope (See Figure 4-2 on page 12-16) or spectrum analyzer, the signal needs to be looped back. This can be done using the RF diagnostics and pausing on test #1 for

Receiver Down converters (with spectrum analyzers).

If the generator path is in doubt, use a known working reference signal into a port, remembering to check settings on RF analyzer page for frequency and port settings.

12-15



Figure 4-2 Expected Output



Ch. 1 Parameters

Rise Time

Frequency

= 27.540 ns

= 10.6998 MHz

+ Width

Overshoot

RMS Volts

= 46.790 ns

= 31.25 mvolts

= 482.0 volts

Offset = -50.00 volts

Delay

P-P Volts

Fall Time

Period

= 0.0000 s

= 1.468 volts

= 27.000 ns

= 93.460 ns

- Width

Preshoot

= 46.670 ns

= 93.75 mvolts

Duty Cycle = 50.06%


Trigger Levels

Chan1 = -50 mvolts

Holdoff = 70.000 ns

12-16



From A15 Reference Section

Wave Shape:

Frequency:

Level: >

Harmonics:

Spurs (> 5 kHz offsets):

20M_REF_A J1(11)

Sine

20 MHz

±

1 ppm Requires Ext Ref of 1 ppm

0 dBm (500 mV rms

)

< -25 dBc

< -110 dBc

Figure 4-3 on page 12-17 shows the expected oscilloscope reading. This signal can also be clearly seen on a spectrum analyzer.

Figure 4-3 Expected Display



Ch. 1 Parameters

Rise Time

Frequency

= 14.810 ns

= 20.2347 MHz

+ Width

Overshoot

RMS Volts

= 25.510 ns

= 0.0000 mvolts

= 290.6 mvolts

Offset = -24.00 volts

Delay

P-P Volts

Fall Time

Period

= 0.0000 s

= 887.5 volts

= 16.770 ns

= 49.420 ns

- Width

Preshoot

= 23.880 ns

= 50.00 mvolts

Duty Cycle = 51.67%


Trigger Levels

Chan1 = -24.00 mvolts

Holdoff = 70.000 ns

12-17



Output to Rear Panel System Bus

Waveshape:

Levels:

Frequency:

F_CNT J1(21)

Sine

100 mV minimum, +5 dBm

700 kHz

To set up this signal for measuring, follow the same procedure as for "10.7M_IF J1(7)", page 12-15, by running the RF Diagnostics. The signal can be seen on a spectrum analyzer or measured on an oscilloscope, see Figure 4-4 on page 12-18 for a typical reading.

Figure 4-4 Typical Display

Channel 1 = 1.000 volts/div

Timebase = 2000 ns/div

Ch. 1 Parameters

Rise Time

Frequency

= 423.590 ns

= 699.580 kHz

+ Width

Overshoot

RMS Volts

= 740.980 ns

= 0.0000 mvolts

= 1.617 volts

Offset

Delay

P-P Volts

Fall Time

Period

= -280.0 mvolts Trigger mode: Edge on positive edge on Chan1

= 0.0000 s

= 4.625 volts

= 423.660 ns

= 1.42943 ns

- Width

Preshoot

= 688.450 ns

= 62.49 mvolts

Duty Cycle = 51.83%

Trigger Levels

Chan1

Holdoff

= -280.00 mvolts

= 70.000 ns

12-18


A11 Receiver Mixer


No extender card required.

Power Supplies

+5 V

GND

PC1

Chassis

70 mA

From A23 Input Section

Inputs

1st_MIX_IN J2

Frequency Range

Level - using known reference connected to RF IN/OUT

0.4 to 1000 MHz

-20 dB compared to reference setting

NOTE:

From A17 Step Loop B

Ensure the reference setting and RF Analyzer are set to the same frequency.

Frequency Range

Input Level

EXT_REF_IN J1

500 to 1000 MHz

3

±

3 dBm

LO (Local Oscillator) Frequency will be 114.3 MHz or 614.3 MHz away from frequency set on RF Analyzer page depending on which one is furthest away from chosen analyzer frequency. See Figure 4-5 on page 12-20 for a typical display.

12-19





Timebase = 875 ps/div

Ch. 1 Parameters

Rise Time

Frequency

= 410 ps

= 714.286 MHz

+ Width

Overshoot

RMS Volts

= 690 ps

= 0.0000 volts

= 135.7 mvolts

Offset = 0.000 volts

Delay

P-P Volts

Fall Time

Period

= 0.0000 s

= 387.5 mvolts

= 420 ps

= 1.40 ns

- Width

Preshoot

= 710 ps

= 0.000 volts

Duty Cycle = 49.28%


Trigger Levels

Chan1 = 0.000 volts

Holdoff = 70.000 ns

12-20



To A16 Receiver

NOTE:

Outputs

RCVR_IN J3

Typical Output Levels

Normal

Underrange

−

27 to

−

37 dBm

−

37 to

−

60 dBm

Conversion Gain

−

10

±

2 dB Temp, .4 to 1000 MHz In.

Flatness Uncal (

±

5 Mhz) (Referenced from I.F.center )

614 MHz I.F.

114.3 MHz I.F.

±

1.5 dB

±

1.5 dB

IF Filter 114.3 MHz

Center

B.W. (1 dB)

Rejection

114.3

±

5 MHz

40 MHz

±

5 MHz

> 35 dB +885 MHz

IF Filter 614.3 MHz

Center

B.W. (1 dB)

Rejection

614.3

±

10 MHz

0.1 MHz Adjustable.

±

0.1 MHz

> 50 dB + 885 MHz

To measure RCVR_IN, the connection must T’ed and a DC blocking capacitor used on the measurement cable. This is to maintain the DC controlling voltage from A16 Receiver, which controls the filters within the receiver mixer. It also the blocking capacitor prvents the controlling voltage being loaded by measurement equipment.

Use a known working reference into RF IN/OUT port, or if in doubt, directly into RF socket on receiver mixer. Ensure frequency and port settings are correct on the RF

Analyzer page. Reduce expected input level if oscilloscope or spectrum analyzer do not show a signal.

12-21


A13 Output

A13 Output


Use coax jumpers on Plug 1, pins 3, 17 and Plug 3, pin 13.

Power Supplies

+5 V J2(4)

+12 V J2(2)

−

12 V J2(3)

+38 V J2(1)

GND J1(1,2,4,5,6,7,8,9,10,11,12,13,14,15,16,18,19,20)

J3(1,2,3,4,5,6,7,8,9,10,11,12,14,15,16,17,18,19,20)

50 mA

310 mA

80 mA

10 mA

Inputs2

From Sum Loop A25 (Change frequency on RF Generator page)

Freq Range

(Coax jumper connection) SGS_500_10000M J1(17)

Input Level required

480 - 1015 MHz

0 dBm

±

2 dB

Spectral Purity required

Harmonics

Spurs

2nd < -10 dBc 3rd - 5th < -15 dBc

< -70 dBc

From A15 Reference Assembly

(Coax jumper connection) OUT_1G_REF J1(3)

Input Level 1 dBm

±

3 dB

Harmonics < -10 dBc

Spurs < -80 dBc > 5 kHz offsets 500-1500 MHz

< -40 dBc < 500 MHz and > 1500 MHz.

OUT_1G_REF only present for RF Generator frequencies from 0 to 291 MHz, used for frequency translation.

12-22


A13 Output

From A4 Modulation Distribution

Input Z

Sensitivity

AM_MOD J2(7)

25 k

Ω

5000 pF parallel shunt.

25% AM / V

See "A4 Modulation Distribution", page 12-8 for measurement procedure.

To A12 Pulse Attenuator

Outputs

Freq

(Coax jumper connection) MAIN_RF_OUT J3(13)

Main Band 501 to 1000 MHz

Divide Band 249 to 500 MHz

Heterodyne Band 0.25 to 248.9999999 MHz

Output Level

Maximum Output Power 0.25 - 249 MHz > 13 dBm

249 - 500 MHz > 15 dBm

Calibrated vernier rng

500 - 1000 MHz > 16 dBm

1 to 8 dBm Normal

0 tp 16 dBm

Minimum Output Lvl(Off) <

−

40 dBm

Overrange

Modulator Rangefor AM.

Spectral Purity — (Only contributions of the outputmodule)

Spurs < -65 dBc

Harmonics < -36 dBc

> 5 kHz Offset 5x4,3x2,RF

D feed, and L.O. feedthrough.

Ampl < +1 dBm + atten loss

(atten loss = 9 dB worst case)

12-23


A14 Pulse Driver



Use coax jumpers on Plug 1, pins 3, 13 and 17. Plug 3, pins 3, 9 and 17.

Power Supplies

+15 V

-15 V

+5 V

Ground

J2(2)

J2(3)

J2(4)

J3(1-2,4-8,10-16,18-20)

J1(1,4,6-12,14,16,18-19)

Inputs

From A15 Reference Section

Frequency:

Levels:

Duty Cycle:

Waveshape

Duty Cycle

Amplitude

Level

1M_REF_C P3(3)

1 MHz

±

5 Hz

CMOS

800 ns high, 200 ns low

Square Wave (Not a true square wave)

25%

4.4 Vp-p

> 7 dBm

Vp-p

225 ns 775 ns

12-24



Outputs

To 13 MHz output on Rear Panel

13M_REF_OUT_A P3(17)

Waveshape: Sine

Level:

Nominal Output Impedance:

Amplitude

>7.5 dBm

50

Ω

3.75 Vp-p

1.7 V rms

To A34 RTI Assembly

Waveshape:

Level:

Amplitude

13M_REF_OUT_B

Frequency and

Harmonics

>7.5 dBm

5.3 Vp-p

HP/Agilent 8922E,G,H,

M Only

To A12 Pulse Attenuator

Level

ATTEN_SELECT

P1 (11, 13, 15, 17, 20)

Pin 20

+5 vdc

Pins 11-17

-12 Vdc

12-25


A15 Reference

A15 Reference


Use coax jumpers on Plug 1, pins 3, 9, 13 and 17. Plug 3, pins 9, 13 and 17.

Power Supplies

+15 V

-15 V

J2(2)

J2(3)

+5 V J2(4)

Ground J3(3,6-8,10-12,14-16,18-19)

J1(1-2,4-8,10-12,14-16,18-20)

90 mA

60 mA

400 mA

Inputs

From Rear Panel

Frequency:

Nominal Impedance:

Signal Level:

Max DC voltage:

EX_REF_IN J1(9)

1,2,5,10, or 13 MHz

±

5 ppm to phase lock

±

1 ppm for accurate global phase measurements.

50

Ω

Between -2.5 dBm and +23 dBm

±

15 V

From A14 Pulse Driver

High Level:

13M_OUT_LOCK J2(7)

(PLL is locked)

Low Level: (PLL is unlocked)

To test, check for presence of 13 MHz out on BNC Rear Panel.

12-26


A15 Reference

To A33 Hop Controller

Hop Control

Levels:

Clock Rate:

Amplitude

Outputs

J2(5,8,9)

TTL

≅

180 kHz (bursts)

+5 Vdc

To Rear Panel

Waveshape:

EX_10M_REF_OUT J1(13)

Sine

Harmonics:

Signal Level:

<-25 dBc

>+7.5 dBm

Spurious at >5 kHz offsets:

Nominal Output Impedance:

<-110 dBc

50

Ω

To A26 Step Loop A

Frequency:

Levels:

Duty Cycle:

Amplitude

Waveshape

Duty Cycle

1M_REF_A P3(4)

1 MHz

±

5 Hz

CMOS


+4 Vdc square wave (not a true square wave)

80%

See

Figure 4-6 on page 12-28

To A17 Step Loop B

Frequency:

Levels:

Duty Cycle:

Amplitude

Waveshape

Duty Cycle

1M_REF_B P3(1)

1 MHz

±

5 Hz

CMOS


+4 Vdc square wave (not a true square wave)

80%

See

Figure 4-6 on page 12-28

12-27


A15 Reference

4.8 Vp-p

200 ns 800 ns

Figure 4-6

To A14 Pulse Driver

Typical Display

Frequency:

Levels:

Duty Cycle:

Amplitude

Waveshape

Duty Cycle

1M_REF_C J3(2)

1 MHz

±

5 Hz

CMOS

800 ns low, 200 ns high

≅

1 Vdc square wave (not a true square wave)

20%

See Figure 4-7 on page 12-28


5.0 Vp-p

200 ns 800 ns

12-28

To A18 Spectrum Analyzer

Frequency:

Waveshape:

Harmonics:

Subharmonics:

SA_20M_REF J3(5)

20 MHz

±

100 Hz

Sine

<-25 dBc

<-30 dBc

Signal Level:


Amplitude

>+3 dBm (+10 dBm typical)

<-70 dBc

1 V rms

2.8 Vp-p

To A19 Measure Assembly (Readings same as SA_20M_REF)

Frequency:

Waveshape:

MEAS_20M_REF J3(13)

20 MHz

±

100 Hz

Sine

Harmonics:

Subharmonics:

<-25 dBc

<-30 dBc

Signal Level:


>+5 dBm

<-70 dBc

To A27 DAC Upconverter

Frequency:

Waveshape:

Signal Level:

Harmonics:


Amplitude

10M_REF_C J3(9)

10 MHz

±

50 Hz

Sine

>+10 dBm

<-25 dBc

<

−

70 dBc

1.2 V rms

3.75 Vp-p


A15 Reference

12-29


A15 Reference

To A5 Premodulation Filter and NSM

10M_REF_B J3(17)

Frequency:

Waveshape:

Signal Level:

Harmonics:


10 MHz

±

50 Hz

Sine

>+10 dBm

<-25 dBc

<-70 dBc

For measurement procedure and waveform, refer to "A5 Premodulation Filter and NSM", page 12-10.

To A9 Global Test and Demod Assembly

Frequency:

Waveshape:

20M_REF_A J3(20)

20 MHz

±

20 Hz Requires 1 ppm reference in

Sine

Signal Level: >+5 dBm

Harmonics:

Subharmonics:

<

−

25 dBc

<

−

30 dBc

Spurious at >5 kHz offsets: <

−

70 dBc

Refer to "A9 Global Test and Demod", page 12-15, for measurement procedure and waveform.

To A13 Output

OUT_1G_REF J1(3)

Frequency:

Waveshape:

Signal Level:

Harmonics:

Spurious at >5 kHz offsets 500 MHz to 1500 MHz:

Phase Noise At 20 kHz offset:

1 GHz

Sine

±

5kHz

1 dBm

±

2 dB

<

−

25 dBc

<

−

60 dBc

<

−

105 dBc

12-30


A15 Reference

To A16 Receiver Assembly

OUT_1G_REF is only present for RF Generator settings up to 291 MHz. Used for frequency translation. Refer to "A13 Output", page 12-22, for readings.

Frequency:

Waveshape:

Signal Level:

Harmonics:

Amplitude

500M_REF J1(17)

500 MHz

±

2.5 kHz

Sine

0 dBm

±

2 dB


Residual FM 0.3 to 3 kHz BW:

Phase Noise At 20 kHz offset:

<-25 dBc

<

−

60 dBc

<3 Hz

<

−

110 dBc

164 mV rms

500 mVp-p

To A19 Measurement Assembly, Voltmeter MUX

1G_DIAG J2(1)

Level if present:

Level if not present or turned off:

>0.20 V

<0.10 V

To A19 Measurement Assembly, Voltmeter MUX

500M_DIAG J2(6)

Level if present:

Level if not present or turned off:

0.20 V

<0.10 V

12-31


A16 Receiver

A16 Receiver


Use coax jumpers on Plug 1, pins 3, 7 and 13. Plug 3, pins 3, 9 and 13.

Power Supplies

+15 V

-15 V

+5 V

Ground

J2(2)

J2(3)

J2(4)

J1(1-2,4-6,8,10-12,15-20)

J3(1-2,4-8,10-12,14-20)

380 mA

80 mA

100 mA

From A33 Hop Controller

Inputs

Levels:

Clock Rate:

Hop Control P(2,5,8)

TTL

≅

180 kHz (bursted)

From A15 Reference

500M_REF P3(3)

Freq:

Input Level:

500 MHz

0

±

2 dBm

±

2.5 kHz

Spurs at >5 kHz offsets: <

−

110 dBc

Waveshape sine

Amplitude 164 mV rms

500 mVp-p

From A11 Receiver Mixer

Frequency:

Input Level:

RCVR_IN J1(3)

114.3 MHz or 614.3 MHz

−

14 dBm to

−

53 dBm

±

5 MHz

CAUTION

Connection must be T’ed and measurement line must have DC blocking capacitor. Refer to "A11 Receiver Mixer", page 12-19, for full measurement procedure.

12-32


A16 Receiver

Outputs

To A9 Global Test and Demod

Sensitivity into

UNMUTED_FM J1(14)

≥

100 k

Ω

load: 20

µ

V/Hz

Max Deviation: 100 kHz peak

Amplitude 1.8 Vdc

See Figure 4-8 on page 12-33

Figure 4-8

To Front Panel

NOTE:

Typical Display

PULSE_DEMOD J1(7)

Level Pulse ON into open circuit:

Level Pulse OFF:

Output Impedance:

10-90% Rise/Fall time:

+2 V

0 V

600

Ω

<2.5

µ s

To test Pulse Demod apply RF Carrier with AM modulation to RF Input, measure Pulse

Demod Out on oscilloscope ≅ 180

mV x %MOD

Ensure correct settings on RF Analyzer page (frequency/amplitude). If the RF Input level is greater than 5 dBm below RF Analyzer setting, the measurement will not register.

12-33


A16 Receiver

To Front Panel

NOTE:

Output Impedance:

FM_DEMOD J1(13)

Sensitivity into open circuit: 20

µ

V/Hz

600

Ω

Max Deviation:

Accuracy DC to 270 kHz:

Sensitivity into oscilloscope

100 kHz peak

±

5%

325

µ

V/Hz

To test FM Demod apply RF Carrier with FM modulation to RF Input, measure FM

Demod on oscilloscope.

Ensure correct settings on RF Analyzer page (frequency/amplitude). If the RF Input level is greater than 5 dBm below RF Analyzer setting, the measurement will not register.

To A3 Audio Analyzer

DEMOD_AUD J2(6)

Output impedance: <10

Ω

Maximum Voltage Output: 12 Vp

DC coupled AM

Depth:

Sensitivity:

DC coupled FM

0 to 95%

0.01 V/% AM

Max Deviation:

Sensitivity:

100 kHz

20

µ

V/Hz

To A9 Global Test and Demod

Freq:

Level:

10.7M_IF J3(9)

Output Impedance:

Global Phase Error:

10.7 MHz

±

50 kHz

+3 dBm

±

0.2 dB

50

Ω

< 0.8

°

RMS

< 1.5

°

Peak

Global Freq Error:

Harmonics:

< 1.5 Hz

<

−

40 dBc

Refer to "A9 Global Test and Demod", page 12-15, for measurement procedure.

12-34

To A18 Spectrum Analyzer

Frequency:

Level

SA_114.3_M J3(13)

114.3 MHz

±

5 MHz

-20 dBm

To A19 Measurement Assembly Voltmeter MUX

AUX7_VM J2(7)

Voltage range:

±

5 V


A16 Receiver

12-35


A18 Spectrum Analyzer



Use coax jumpers on Plug 1, pins 3 and 17. Plug 2, pin 17.

Power Supplies

+12 V

-12 V

+5 V

Ground

J2(2)

J2(3)

J2(4)

J1(1,2,4-20) J3(1-16,18-20)

165 mA

300 mA

225 mA

Inputs

From A16 Receiver (Needs Reference Input to obtain a reading)

Frequency:

SA_114.3M P3(17)

114.3 MHz

±

5 MHz

Max Ref Level -12 dBm (Corresponds to -23 dBm input at 8922 Aux RF In with

20 dB RF attenuation and 20 dB Step Gain.) -20 dBm on

Spectrum Analyzer with Reference signal connected, and expected input level set to same as reference signal on RF analyzer page

Max second harmonic:

.1 dB Compression:

< -48 dBc

> -12 dBm

From A15 Reference

SA_20MREF J1(3)

Waveshape: Sine

Level: > +3 dBm on spectrum analyzer =

+10 dBm Typical

Nominal input impedance: 50

Ω

Amplitude 1 V rms

2.8 Vp-p

12-36



From A19 Measurement Assembly

SWP_STRT J1(6)

Levels: CMOS

High = Sweep Start

Low = Sweep Stop

CLK_REF_SA J2(8) Serial Bus

E/I_SA J2(9) to/from A33

DAT_REF_SA J2(5) Hop Controller

Levels:

Clock Rate:

TTL

≅

80 kHz (bursts)

Outputs

To A19 Measurement Assembly

SA_SCPT J1(7)

Output Impedance:

Detector Output (Max, Top of Screen):

Input:

Res BW:

Step Gain:

Variable Gain

Sensitivity:

Det Dynamic Range:

Det Linearity (Uncal):

Log Amp output with no RF applied:

100

Ω

1.532 V

-12 dB

100 kHz

0 dB

0 dB

17.6 mV/dB typical

>80 dB

±

1.5 dB

120 mV Typical

12-37


A19 Measurement

A19 Measurement


Power Supplies

+5 V

+12 V

-12 V

+38 V

J1(15,16) J2(21,24)

J2(26)

J2(25)

J3(17)

+12 V Aux J2(28)

420 mA

120 mA

120 mA

< 1 mA

0 mA

12-38


A19 Measurement

Inputs

Voltmeter Multiplexer

Input Z

Full scale input

DC Offset

Vref (-)

Vref (+)

Vref Aging

+5 J2(24,21) J1(15,16)

+12 J2(26) - FM Motherboard

+38 J3(17) - FM Motherboard

-12 J2(25)

+12 AUX J2(28)

IN_TEMP J3(4)

IN_VOLT J3(5)

DET_LO J3(7)

DET_HI J3(6)

AUD1_VM J3(8) - FM Audio Analyzer 1

AUD2_VM J3(3) - FM Audio Analyzer 2

RI_VM_ID J3(10)

RI_VM J2(12)

RSYN_DIAG J3(9)

1G_DIAG J3(11) - From Reference Section A15

500M_DIAG J3(13) - From Reference Section A15

LFS1_VM J3(21) - FM SIG Source/Analyzer A6

LFS2_VM J3(20) - FM SIG Source/Analyzer A6

OUT1_DIAG J3(15) - FM Output Section A13

PS_VM Internal

CURRENT_SEN_VM J2(30)

SGND Internal

AUX1_VM J3(8) - From Step Loop A A26

AUX2_VM J3(30) - From Step Loop B A17

AUX3_VM J3(14) - From Sum Loop A25

AUX4_VM J3(16) - From DAC/Up Convertor A27

AUX5_VM J3(18) - FM Motherboard

AUX6_VM J3(19) - FM Motherboard

SCOPE_1 Internal

SCOPE_2 Internal

+VREF Internal

-VREF Internal

> 1 M

Ω

// 1000 pF

±

5 V

< 100 mV Uncalibrated

5 V

±

3 mV Env (

±

.15 mV)

-5V

±

3 mV Env (

±

.15 mV)

±

0.125 mV/1000 hrs

12-39


A19 Measurement

Scope Multiplexer

PROC_AUD J3(24) - FM Audio Analyzer 2 A2

SA_SCP J3(23) - From Spectrum Analyzer A18

RI_SCP J3(26) - From Spectrum Analyzer A18

AUX_SCP J3(21)

DET_LO Internal

DET_HI Internal

GROUND Internal

CALIBRATION REFERENCE Internal

No Minimum Input

Max Input

Input Z

DC Offset

AD Ref Voltage

Sample Rate

10 V

> 1 M

Ω

(No capacitance)

< 100 mV Uncalibrated

2

±

.10 V (Full 8 Bits)

10 Mega Samples/S — in bursts

Max Input Voltage

3 dB Bandwidth

10.0 V

500 kHz

12-40


A19 Measurement

Counter Inputs

AUDIO1_CNT J1(6) - FM Audio Analyzer 1 A3

RI_CNT J1(8)

IN_CNT J1(5) - From Input Section A23

IF_CNT J1(9) - From Global Board A9

TIME BASE REF 20 MHz J3(29)

MIXED_IF Internal

STRIG Internal

GND Internal

20 MHz Time Base Standard The 20 MHz Sine wave drives a divide by 2 circuit which provides the 10 MHz reference for the counter.

Input Impedance 50

Ω

Input Level > +5 dBm Sinewave

2nd Harmonics

IN_CNT

Input Z

Minimum input

< -25 dBc

Input module prescaler count signal

2.35 k

Ω

— .1 uF AC Coupling

100 mV Peak

10 kHz to 4 MHz Freq Range

IF_CNT

Input Z

Minimum input

Freq

AUD1_CNT

RI_CNT

Maximum Count Time

Minimum Count Time

Count time step size

Accuracy

Gate Time Jitter

Resolution

Receiver Module I.F. Count

2.35 k

Ω

— 100 pF AC Coupling

100 mV Peak

10.7 MHz

HCMOS Vih > 4 V, Vil < 1 V

HCMOS Vih > 4 V, Vil < 1 V

25.6

µ

S x 216 = 1.6777216 S

25.6

µ

S

25.6

µ

S same as 10 MHz Ref

<

±

10 nS 100 mV Input

0.01 ppm/gate time

12-41


A19 Measurement

Trigger Input

Trigger Logic

SIGN_SCP_TRIG

RI_SCP_TRIG

EXT_TRIG

Maximum Input

Scope Trigger Internal

SIGN_SCP_TRIG J1(10)

RI_SCP_TRIG J1(7)

EXT_TRIG J1(4)

INTERNAL TRIGGER Internal

HCMOS (Vih > 4 V, Vil < 1 V)

HCMOS

HCMOS

±

15 V EXT_TRIG

12-42


A23 Input (HP/Agilent 8922A.B,E,F,G,H) Only

NOTE:


Applies to Mechanical Attenuator only.


Power Supplies

+12 V

+5 V

-12 V

+12 V Aux

43.5

J6(9)

J6(12)

J6(10)

J6(5)

No relays

With relays

+ Prescaler

20 mA

215 mA

15 mA

190 mA

206

220 mA

360 mA

460 mA

J6 (11)

Inputs

From Front Panel

Freq Range

Max Meas Level

AUX RF INPUT J3

.4 to 1000 MHz

.10 Watts (+20 dBm)

Trip Level +25 < Level < +28 dBm

From A12 Pulse Attenuator

Freq Range

SG IN J4

.4 to 1000 MHz

To avoid removing bottom cover and motherboard covers, measure MAIN_RF_OUT on

A13 output section.

12-43



From Front Panel

RF IN/OUT Output J1

Freq Range .4 to 1000 MHz

Outputs

From Front Panel

Freq Range

AUX RF OUT J2

.4 to 1000 MHz

Relative path loss with respect to siggen input,thru path (0 dB).

.4 MHz

1000 MHz

Loss < 1 dB

Loss < 6 dB

Relative path loss with respect to siggen input,atten 5 to 125 dB.

.4 MHz Loss < 3 dB

1000 MHz Loss < 10 dB


DET LO J6(14)

.4 to 1000 MHz Meas Freq Range

Output level (Uncal)

OFFSET VOUT (LOW)

VOUT (LOW)

VOUT (HIGH)

100 mV +- 50 mV No input Power.

280 mV +- 50 mV + OFFSET (+10 dBm, 50 MHz)

.53 * V(LOW)

12-44



To A11 Receiver Mixer

Freq Range

Underrange

1st_MIX_IN J5

Output Level Normal

.4 to 1000 MHz

−

12 dBm to

−

22 dBm

−

22 dBm to

−

50 dBm

Measure using known reference signal, refer to "A11 Receiver Mixer", page 12-19, for procedure.

12-45




AUTO_RNG_DET

Output Level

AUTO_RNG_ALC

Range

TEMP_DET

Nominal Output

Sensivitity

DUPLEX_DET

Nominal

Trip Level

ANT_DET

Nominal

Trip Level

FILTER_OUT_DET

Nominal

DET_HIGH

Output

GND

Nominal

IN_VOLT J6(15)

Prescaler AGC RF peak detector voltage.

4.71

±

.5 V When AGC has active control.

Prescaler AGC modulator control voltage.

0 to + 4 V

Temperature sensor voltage.

2.98

±

.1 Volts @ 25 Deg C

10 mV / C

Duplex port RF peak detector Voltage.

100 mV

±

20 mV @ +10 dBm

400 mV

±

10 mV with relay closed.

785 mV

±

10 mV with relay opened.

Antenna port RF peak detector voltage.

100 mV

±

20 mV @ +10 dBm

400 mV

±

10 mV

Receiver Output Port RF peak det. Voltage.

10 mV

±

5 mV @ -10 dBmOutput.

RF Power peak detector high level voltage.

See DET HI/LO specs (RF Power Detector).

Input Section Analog Ground.

±

10 mV

12-46


A23 Input (Agilent 8922M/S Only)

NOTE:


Applies to Electronic Attenuator only.


Power Supplies

+12 V

+5 V

-12 V

+12 V Aux

43.5

J6(9)

J6(12)

J6(10)

J6(5)

20 mA

226 mA max

15 mA

286 mA max

360 mA max

J6 (11)

Inputs

From Front Panel

Freq Range

Max Meas Level

AUX RF INPUT J3

20 to 1000 MHz

.10 Watts (+20 dBm)

Trip Level +25 < Level < +28 dBm

From A12 Pulse Attenuator

Freq Range

SG IN J4

20 to 1000 MHz

To avoid removing bottom cover and motherboard covers, measure MAIN_RF_OUT on

A13 output section.

From Front Panel

RF IN/OUT Output J1

Freq Range 20 to 1000 MHz

12-47



Outputs

From Front Panel

Freq Range

AUX RF OUT J2

20 to 1000 MHz

Relative path loss with respect to siggen input,thru path (0 dB).

20 MHz

1000 MHz

Loss < 6 dB

Loss < 8 dB

Relative path loss with respect to siggen input,atten 5 to 125 dB.

20 MHz Loss < 3 dB

1000 MHz Loss < 3 dB


DET LO J6(14)

90 to 1000 MHz Meas Freq Range

Output level (Uncal)

OFFSET VOUT (LOW)

VOUT (LOW)

VOUT (HIGH)

100 mV +- 50 mV No input Power.

280 mV +- 50 mV + OFFSET (+10 dBm, 50 MHz)

.53 * V(LOW)

To A11 Receiver Mixer

Freq Range

Underrange

1st_MIX_IN J5

Output Level Normal

20 to 1000 MHz

−

12 dBm to

−

22 dBm

−

22 dBm to

−

50 dBm

Measure using known reference signal, refer to "A11 Receiver Mixer", page 12-19, for procedure.

12-48




TEMP_DET

Nominal Output

Sensivitity

DUPLEX_DET

Nominal

Trip Level

ANT_DET

Nominal

Trip Level

FILTER_OUT_DET

DET_HIGH

Output

GND

Nominal

IN_VOLT J6(15)

Temperature sensor voltage.

2.98

±

.1 Volts @ 25 Deg C

10 mV / C

Duplex port RF peak detector Voltage.

100 mV

±

20 mV @ +10 dBm

785 mV

±

10 mV

Antenna port RF peak detector voltage.

150 mV

±

50 mV @ +10 dBm

400 mV

±

10 mV

Receiver Output Port RF peak det. Voltage.

RF Power peak detector high level voltage.

See DET HI/LO specs (RF Power Detector).

Input Section Analog Ground.

±

10 mV

12-49


A25 Sum Loop

A25 Sum Loop


Use coax jumpers on Plug 1, pin 3. Plug 3, pins 3, 17.

Power Supplies

+15 V

-15 V

+5 V

Ground

J2(2)

J2(3)

J2(4)

J1(1-2,4-20)

J3(1-2,4-16,18-20)

300 mA

70 mA

100 mA

Inputs

From A27 DAC/Upconverter

Frequency:

Level:

Waveshape

Amplitude

DAC_UP_OUT J3(3)

13.4 MHz

±

50 kHz + Modulation

0 dBm

±

3dB - measured on spectrum analyzer sine (no modulation)

4 V rms

≅

12 Vp-p

From A26 Step Loop A

Voltage

SUM_LP_PTUNE J2(7)

-12 Vdc to +12 Vdc - measured on spectrum analyzer 0

± 3 dBm at

RF Generator frequency

12-50


A25 Sum Loop

From A26 Step Loop A

STEP_LP_OUT/A J3(17)

Frequency: 486 - 1015 MHz

Resolution:

Level:

Waveshape

100 kHz

3 dB

±

3 dB - on spectrum analyzer sine

Channel 1

If difficulty is found measuring STEP_LP_OUT, set RF Generator to 250 MHz and use oscilloscope settings from list shown below.

= 200.0 mvolts/div

Timebase = 500 ps/div

Ch. 1 Parameters

Rise Time

Frequency

= 590 ps

= 483.092 MHz

+ Width

Overshoot

RMS Volts

= 1.060 ns

= 0.0000 mvolts

= 1.617 volts

Offset

Delay

P-P Volts

Fall Time

Period

= -24.00 mvolts Trigger mode: Edge on negative edge on Chan2

= 0.0000 s

= 1.1 volts

= 620 ps

= 2.070 ns

- Width

Preshoot

= 1.010 ns

= 12.50 mvolts

Duty Cycle = 51.20%

Trigger Levels

Chan1

Holdoff

= -24.00 mvolts

= 70.000 ns

Outputs

To A26 Step Loop A

Level:

High

Low

SUM_LOCK J2(1)

TTL (High = Out of Lock)

Typically + 7 Vdc

Typically < 0.3 Vdc


Level:

AUX3_VM J2(6)

-5 V to +5

12-51


A25 Sum Loop

To A13 Output

SGS_500_1000M J1(3)

Frequency:

Level:

Harmonics:

500 to 1015 MHz

0 dBm

±

2 dB

< -20 dBc

Spurious >5 kHz offset: < -60 dBc

Change frequency on RF Generator page. Select modulation types on or off. On spectrum analyzer, GMSK Modulation can be seen between centre frequency and first harmonics by level of increased noise floor.

12-52


A17, A26 Step Loop



Use coax jumpers on Plug 1, pin 3. Plug 3, pin 3.

Power Supplies

+15 V

-15 V

+5 V

Ground

J2(2)

J2(3)

J2(4)

J1(1-2,4-20)

J3(1-2,4-20)

250 mA

100 mA

450 mA

Inputs

From A15 Reference

1M_REF_A/B P3(3)

Frequency: 1 MHz

±

5 Hz

Level: CMOS

For measurement procedure refer to "A15 Reference", page 12-26.

From A25 Sum Loop for A26 (Step Loop A) only

Level:

High

Low

SUM_LOCK J2(1)

TTL (High = Out of Lock)

Typically + 7 Vdc

Typically < 0.3 Vdc

12-53



From A33 Hop Controller

Hop Control J2(5,8,9)

Levels: TTL

1 MHz (bursted) Clock Rate:

Levels

Pin 5

Pin 8

Pin 9

5 Vdc

-1.25 Vdc

0 Vdc

Outputs

To A25 Sum Loop Assembly

SUM_LP_PTUNE J2(7)

Level: -12 Vdc to +12 Vdc

See "A25 Sum Loop", page 12-50, for measurement procedure.

To A25 Sum Loop (A26 Step Loop A), To A11 Receiver Mixer (A17 Step Loop B)

Frequency:

Resolution:

STEP_LP_OUT J1(3)

486 - 1015 MHz

Level:

Harmonics:

100 kHz

3 dB

±

3 dB

< -20 dBc

Spurs (>5 kHz offsets): < -60 dBc

Waveshape sine

Levels 350 V rms

1 Vp-p

Step Loop B(A17) To achieve lowest frequency from available range (to compensate for digital oscilloscope frequency range to measure higher RF frequencies), select 380.8 MHz from RF analyzer page (This uses 495.1 MHz from step loop and 114.3 MHz IF).

Step Loop A(A26) Levels same as Step Loop B, except for set frequency on RF Generator page. To obtain lowest frequency at step loop A, output set to 249.1 MHz.

12-54


AUX1/2_VM J2(6)

Voltage Range: -5 V to +5 V - typically +5 Vdc for default/Preset settings



12-55


A27 DAC/Upconverter



Use coax jumpers on Plug 1, pins 7, 9 and 13. Plug 3, pin 15.

Power Supplies

+15 V

-15 V

+5 V

-5 V

Ground

J2(2)

J2(3)

J2(4)

J2(1)

J1(1,3,4,17,18,20)

J3(1-4,6-14,16-20)

20 mA

50 mA

25 mA

150 mA

Inputs

From A5 Premod Filter and NSM

Frequency:

NSM_IF_CLK J1(2)

17.3333 MHz

±

250 Hz

Level: TTL

See "A5 Premodulation Filter and NSM", page 12-10, for measurement procedure.

NSM_IF_DATA J1(5-16)

Level: TTL

The NSM_IF_DATA can be probed on SMC connectors Plug 1 (pins 7, 9 and 13). The

NSM Data Stream is difficult to measure on a digital oscilloscope.

The Table shown are typical settings for an oscilloscope. To obtain a reading the display persistance must be increased. Typically 1 bit of the data stream will be

≅

60 ns.

12-56



Channel 2

Timebase

Delta T

Start

Delta V

Vmarker1

= 500.0 mvolts/div

= 50.0 ps/div

= 1.880 ps

= -248.380 ns

= 2.470 volts

= 420.0 mvolts

Offset

Delay

= 1.450 volts

= 0.0000 s

Stop = -246.500 ns

Vmarker2 = 2.890 volts

Trigger mode: Edge on negative edge on Chan2

Trigger Levels

Chan1 = 1.450 volts

Holdoff = 70.000 ns

From A15 Reference

10 MHz Ref C J1(19)

Waveshape: Sine

Level:

Harmonics:

Frequency:

>10 dBm

< -25 dBc

10 MHz

See "A15 Reference", page 12-26, for measurement procedure.

Outputs


AUX4-VM J2(6)

13.4 MHz present level:

13.4 MHz not present level:

0.3 to 0.5 Vdc into 1M

Ω

-0.3 to -0.5 Vdc into 1M

Ω

To A25 Sum Loop A

Frequency:

Resolution:

Level:

Harmonics:

DAC_UP_OUT J3(15)

13.4 MHz

±

50 kHz + Modulation

1 Hz

0 dBm

±

3 dB

< -30 dBc

Spurs >5 kHz offsets: < -60 dBc

See "A25 Sum Loop", page 12-50, for measurement procedure.

12-57




This spec is for the complete assembly which includes the transformer and plug-in boards.

Input

Nominal Line Voltages: 100, 120, 22, 240

Tolerance: +7%, -14%

Frequency Range: 48 to 440 Hz

❒ Overvoltage protected.

❒ +21 Volts and +25 Volt supplies always on, all other supplies controlled with front panel power switch.

❒ Short circuit protected.

❒ Thermal shutdown capability.

❒ Two supply short protection (shorting +25 unregulated is protected only by fuse).

❒ Fan turns off with power down.

❒ Fan speed is a function of temperature.

Outputs

Supply

Voltage

+38 V

+15 V

-15 V

+5.2 V

-5/2 V

Tolerance incl. load

1%

1%

1%

1%

4%

+12 Aux V 1%

+25 Unreg -10%

+21 V 1% limit

.3A

4.2 A

2.6 A

12.8 A

3.0 A

2.0 A

+60%

1 A

Line Rel.

Ripple RMS

.1 mV

.1 mV

.1 mV

.1 mV

.1 mV

.1 mV

3A fuse

Max CW

Spur a

RMS

1

µ

V

1

µ

V

1

µ

V

1

µ

V

1

µ

V

1

µ

V

1V

Total noise 20

Hz-20 MHz

1mV

.3 mV

.3 mV

.1 mV

.1 mV

.2 mV

10

µ

V

Noise nV/

√

Hz

@20 kHz

400

150

150

50

50

100

Three terminal regulator a.

This is the spec for rates greater than 60 kHz. For rates less then 60 kHz the spec increases by 6 dB per octave until we reach a maximim of 100

µ

V at rates less than 600 Hz.

12-58


A33 Hop Controller

From Rear Panel


Power Supplies

+15 V

-15 V

+5 V

Ground

J21(100)

J21(40,59,60,61,91,92)

J21(99)J2(1)

J21(17,18,42,43,56,69,87,93,94)

< 5 mA

0 mA (not used)

< 1 A

Inputs

Hop Control Input Bus

Amplitude:

Low drive requirement:

Format:

HOP_ADDR J21(5-15)

High drive requirement:

TTL levels

100

µ

A

-1 mA unsigned binary, high = 1

Amplitude:


Triggered by:

TX_HOP J21(4)


TTL levels

100

µ

A

-2 mA

Rising edge

12-59



From Rear Panel

From Rear Panel

From Rear Panel

RX_HOP J21(3)

Amplitude:



Triggered by:

TTL levels

100

µ

A

-2 mA

Rising edge

Amplitude:


Triggered by:

SEQ_HOP J21(2)


TTL levels

100

µ

A

-2 mA

Rising edge

SEQ_HOP_RESET J21(1)

Amplitude:



TTL levels

100

µ

A

-2 mA

Active Level: Low

Format:

RESET_SELECT J21(19)

Amplitude: TTL levels

High drive requirement: 100

µ

A

Low drive requirement: -1 mA high = reset to zero low = reset to table location specified by the HOP_ADDRESS

12-60

Front Panel Input

ON latency:

OFF latency:

Amplitude:

High:

Low:

PULSE_MOD_IN J21(68)

≅

25

µ

S

≅

10

µ

S

TTL levels



No attenuation of sig gen output

Attenuate sig gen output

100

µ

A

-1 mA

Host Processor Interface

GADDR

GDATA

GLDS

G-R/W

IO_INT

J21(57,58,62-66,80,81,78,79)

J21(83-86,88-90,95)

J21(76)

J21(77)

J21(97)

Outputs

SEQ_TRIG_OUT J21(21)


EA60_SW0/2 J21(71,72,73)




12-61



Fast Hop Busses I/O

Clock, Data, and Enable

INPUT SECTION J21(40,46,44)

STEP LOOP/A J21(29,27,30)

STEP LOOP/B J21(37,35,36)

PREMOD FILTER & NSM

J21(25,23,26)

Amplitude:

Clock Rate:

TTL Levels

1 MHz (bursted)

Slow Busses

Clock, Data, and Enable

RECEIVER J21(41,39,34)

OUTPUT SECTION J21(41,39,28) (Clock and data shared with Rcvr)

REFERENCE SECTION J21(31,33,32)

SPECTRUM ANALYZER J21(31,33,38) (Clk & data shared with ref)

MODULATION DISTRIBUTION J21(53,54,52)

AUDIO 1 J21(53,54,49)

AUDIO 2 J21(53,54,50)

INPUT SECTION J21(53,54,51)

(Clk & data shared between MOD, AUD1,AUD2, INPUT2)

Amplitude:

Clock Rate:

TTL Levels

Approximately 180 kHz (bursted)

12-62

13

Instrument Block Diagrams

13-1

Instrument Block Diagrams

Introduction

Introduction

This chapter contains the block diagrams for the HP/Agilent 8922A/B/E/F/G/H/M/S.

Additional information for troubleshooting to the block diagram level can be found in the following chapters.

Chapter 4, Using the Service Kit, explains how to use the HP/Agilent 83210A Service Kit to extend the modules and make signal measurements.

Chapter 5, Troubleshooting the Controller/Display, gives procedures for troubleshooting display problems or problems with the HP/Agilent 8922 Controllers.

Chapter 6, Troubleshooting the Power Supply, contains information about the power supply and regulator circuits as well as test points and power distribution.

Chapter 12, Module I/O Specs, contains detailed descriptions of the input and output signal characteristics for most RF and Audio modules.

Chapter 14, Block Diagram Theory, has a detailed technical discussion of the function of each assembly in the block diagrams.

Reading the Pin Numbers

The signal names and pin numbers are shown on the diagrams, the pin numbers are numbered according to the plug number found on the module, the jack number found on the mother board, and the pin number.

For example: P2/J23(14)

P2 indicates that the signal is found on the module at Plug 2.

J23 indicates the signal is found on the mother board on Jack 23.

(14) indicates that pin number 14 (On plug 2 and Jack 23) carries the signal.

Block Diagram 1

Block Diagram 1 contains the RF and Audio Analyzer circuits in the HP/Agilent 8922.

These are the primary circuits used to make measurements. The Spectrum Analyzer is an option in the HP/Agilent 8922F/H/M/S. The 14 dB input attenuator is replaced with an 8 dB attenuator in the HP/Agilent 8922F/H/M/S.

Block Diagram 2

Block Diagram 2 contains the RF and Audio Generator circuits. This block diagram contains the generator hardware that is common to all three models of HP/Agilent 8922.

13-2


Introduction

Block Diagram 3

Block Diagram 3 contains circuits found only in the HP/Agilent 8922B. These circuits are used with the RF Generator circuits (BD2) to generate GSM signals. These circuits can only be controlled with the rear-panel GPIO connector on the HP/Agilent 8922B.

Block Diagram 4

Block Diagram 4 illustrates the modules that are primarily digital and are used to generate the digital information and control signals required to set up a call with a GSM mobile radio. These are not found in the the HP/Agilent 8922A or B.

Block Diagram 5

Block Diagram 5 is an overall block diagram. It illustrates the interconnecting control signals and busses between the modules. This block diagram also shows detailed pin labels for the A19 Measurement board and A33 Hop Controller. The A19 board measures voltages and frequencies from most of the analog modules. It is the primary tool used for the internal diagnostic measurements and many other measurements. The A33 Hop

Controller contains the circuits that communicate with the analog analyzer and generator modules.

13-3


Introduction


13-4

14

Block Diagram Theory of Operation

14-1

Block Diagram Theory of Operation

Introduction

Introduction

The HP/Agilent 8922 is a specialized instrument designed to test GSM and PCN mobile radios and base station transmitters. The HP/Agilent 8922A contains the analog audio and

RF hardware necessary to generate 0.3 Gaussian Minimum Shift Key (GMSK) signals.

Digital hardware has been added to the HP/Agilent 8922B to allow it to buffer digital data from a computer and properly format it for the GSM protocol. The HP/Agilent 8922E/F/

G/H/M/S adds complete digital control and allows it to test a mobile radio by simulating a calibrated base station. For more information on the capabilities of the HP/Agilent 8922 family of test sets, refer to the appropriate technical data sheets.

The complexity of the HP/Agilent 8922 circuits combined with the convenient modular architecture, allows the HP/Agilent 8922 to be repaired more quickly and economically with Assembly Level Repair (ALR). This is the recommended repair strategy, and this manual is focused to support this type of repair. The block diagram discussion provides sufficient technical detail to understand the overall hardware of the HP/Agilent 8922 and allows in-depth troubleshooting to isolate failures to a single assembly.

The primary troubleshooting method for the HP/Agilent 8922 is to use the memory card diagnostics supplied with this manual. This section is important reading for anyone trying to understand the overall hardware of the HP/Agilent 8922, and should be used as a tutorial or when the diagnostics cannot correctly locate a faulty assembly.

14-2


Technical Discussion

Technical Discussion

The HP/Agilent 8922 can be divided into two instruments, a signal generator and a signal analyzer. This discussion is intended to follow the block diagrams in chapter 13. The assemblies in Block Diagrams 1 and 2 are covered first. These are the primary assemblies where it is possible to do assembly level measurement and troubleshooting. All the hardware in Block Diagrams 1 and 2 are common to all HP/Agilent 8922 instruments.

Block Diagrams 3 and 4 illustrate hardware that is unique to the HP/Agilent 8922B and

HP/Agilent 8922E/F/G/H respectively. Because these modules are primarily digital, the discussion on this hardware is limited to a high level functional description. Often troubleshooting these boards is difficult at the module level without sophisticated logic or signature analysis. Module swap is the fastest way to troubleshoot hardware problems for these assemblies. The final discussion focuses on the modules in Block Diagram 5. More information about troubleshooting display and controller problems is also included in chapter 5.

When important, the input and output specifications for most assemblies are tabulated in chapter 12, Module I/O Specs. For additional details on the exact signal levels and frequencies for assembly inputs and outputs, refer to chapter 12, Module I/O Specs.

14-3


Block Diagram 1

Block Diagram 1

RF Analyzer

Audio Analyzer

Spectrum Analyzer

A23 Input

A24 High Power Attenuator

The A23 Input assembly is both the input for the RF Analyzer section and the final output from the RF Generator section. Additional information on how the A23 Input assembly is used in the signal generator is covered in the Block Diagram 2 discussion.

The RF input signal is input to the HP/Agilent 8922 using either the RF IN/OUT connector (for high power applications > 20 dBm) or using the AUX RF IN connector for lower power input signals. The input signal on the front panel RF IN/OUT connector is first sent to the A24 High Power Attenuator. This attenuates the signal by approximately

14 dB (8 dB on the HP/Agilent 8922F,H,M,S) where it can be directly used by the A23

Input assembly.

The A23 Input assembly has an RF power detector that converts the power on the RF IN/

OUT connector to a dc voltage. This dc signal is sent to the A19 Measurement assembly where it is measured. These dc signals are sent to the A19 Measurement assembly using the det_lo and det_hi inputs to the A19 Measurement assembly. The det_lo signal is lower sensitivity (for the highest power signals) and det_hi is high sensitivity (for lower power signals). Accurate RF power measurement can only be made using the RF IN/OUT connector on the HP/Agilent 8922. These circuits are used to measure both CW and

Pulsed RF power. For accurate RF power measurements it is necessary to zero the power meter and enter the frequency of the RF input signal. These two functions will cause the power meter to use the proper correction factors to compensate for temperature changes and frequency losses.

After the power detector, the RF IN/OUT connector is routed to a power splitter and then an RF switch. This switch selects between the RF IN/OUT signal or the AUX RF IN signal.

Selectable input attenuators in the A23 Input assembly are switched in and out, manually or automatically. This keeps the input level within a range that works best for the mixers,

IF amplifiers, and detector in the remainder of the HP/Agilent 8922. Filters are automatically switched in to remove images and other interfering signals. The frequency ranges of the 4 different filters are shown on Block Diagram 1.

The A23 Input assembly contains a voltage multiplexer (mux) to route internal diagnostic voltages to the A19 Measurement assembly. Diagnostics individually check that all the input attenuator switches provide attenuation, although the accuracy of this measurement

14-4


Block Diagram 1 is limited. The diagnostics also verify the input filters and a connectivity check is provided to verify the connections going into and out of the A23 Input assembly. This section is a likely cause of power measurement problems, especially if the diagnostics pass indicating that the measurement board is responding correctly.

A17 StepLoop B

This assembly creates RF reference signals from 500 to 1000 MHz. These signals are derived from a 1 MHz output from the A15 Reference section assembly and digital inputs from the A33 Hop Controller assembly. The HP/Agilent 8922 has the ability to change RF frequencies very quickly; to “frequency Hop”. This is necessary because the radios and base stations change frequencies and the HP/Agilent 8922 must be able to change along with them. The A33 Hop Controller assembly controls which frequency the A17 Step

Loop assembly will create. Most radio and base station testing is done at carrier frequencies near 900 MHz. For these frequencies, A17 STEP LOOP B is approximately

114.3 MHz lower than the RF input signal that was entered. Unlike some RF analyzers, the HP/Agilent 8922 cannot automatically “tune” to the RF input signal. This information must be entered for the 8922 to set up the proper filters and LO frequencies.

A26 Step Loop A assembly and A17 Step Loop B assembly have exactly the same hardware and can be interchanged if necessary. IMPORTANT: The A25 Sum Loop assembly is adjusted to match the Step Loop A assembly. If either the A25 Sum Loop or

A26 Step Loop A assembly is changed, it is necessary to readjust the A25 Sum Loop assembly using the instructions in chapter 7 section of this manual.

Early versions of the HP/Agilent 8922 provided the A17 Step Loop B assembly output to the rear panel, which was then normally routed back into the instrument using an external coax cable. Newer instruments now route the signal directly from the A17 Step Loop B assembly to the A11 Receiver Mixer assembly.

The diagnostic procedures check the A17 Step Loop B assembly at various frequencies but can only verify operation during static (non-hopped) operations. If the instrument meets its specifications during static operation but fails during frequency hopping, it may be that the A17 Step Loop B assembly is slow to lock-up to the correct new frequency. The error would appear as a high phase or frequency error at the beginning of the frequency hop.


This modules mixes the input signal from the A23 Input assembly with the LO signal from the A17 Step Loop B assembly (or rear panel signal on early versions). The sum or difference signal will always be within

±

50 kHz of 114.3 MHz or 614.3 MHz. This signal is then filtered by the A11 Receiver Mixer assembly and passed onto the receiver section.

The control voltage to select the filter is provided by the A16 Receiver assembly. This control voltage is fed into the A11 Receiver Mixer assembly (as a dc voltage) on the same cable that is used for the RF output to the A16 Receiver assembly.

14-5


Block Diagram 1

To measure this signal it is necessary to “tee” the connection so that the dc control voltage is always available to the A11 Receiver Mixer assembly from the A16 Receiver assembly.

It is then possible to measure the dc voltages with an external voltmeter or using a blocking capacitor, a spectrum analyzer can be connected to view the RF signal from the mixer. Failure to use a blocking capacitor will cause the switch in the A11 Receiver Mixer assembly to be indeterminate and accurate measurements cannot be made. Although the

A11 Receiver Mixer assembly does not contain any diagnostic test points, it is used extensively during diagnostics to route RF test signals into the A16 Receiver and A18

Spectrum Analyzer assemblies.

A16 Receiver

The A16 Receiver assembly input signal from the A11 Receiver Mixer assembly is either

114.3 MHz or 614.3 MHz. If the signal is 614.3 MHz it is immediately downconverted to an IF of 114.3 MHz by a 500 MHz reference signal from A15 Reference assembly.

This signal at 114.3 MHz is then filtered and split. It is routed to the A18 Spectrum

Analyzer assembly and to another mixer where it is further downconverted for demodulation. The LO for the next downconversion is 125 MHz which is derived from the same 500 MHz reference signal that was used earlier. The signal is now at 10.7 MHz

±

50 kHz. This signal is a duplicate of the input signal except the frequency has been translated.

It still contains the pulse and modulation information. The primary signal path for this signal is to the A9 Global Test and Demod assembly where frequency and phase accuracy are measured.

The 10.7 MHz signal also drives an FM discriminator and pulse detector that demodulate the signal. The demodulated waveforms are then routed to the front panel, A3 Audio

Analyzer 1 assembly, or A9 Global Test and Demod assembly depending on the switch settings. These connections are detailed in Block Diagram 1.

The A16 Receiver assembly has extensive diagnostics which test the internal filters, switches, and demodulators. The most critical signals from the A16 Receiver assembly are the 114.3 MHz signal for the A18 Spectrum Analyzer assembly and the 10.7 MHz to the

A9 Global Test and Demod assembly. The signal to the A9 Global Test and Demod assembly should be near +3 dBm for good signal to noise ratio (and no compression) in the A9 Global Test and Demod assembly.


The first function of the A9 Global Test and Demod assembly is to downconvert the 10.7

MHz signal from the receiver to 700 kHz

±

50 kHz. This signal is then routed to a counter on the A19 Measurement assembly. The frequency of this signal is measured and is used to calculate the RF input signal frequency. Measuring an RF input signal frequency is a good method of determining if the frequency translation hardware up to the A9 Global

Test and Demod assembly is functioning properly.

14-6


Block Diagram 1

The primary measurements of the A9 Global Test and Demod assembly are phase, frequency, and amplitude information of the 0.3 GMSK modulation signals. The A9

Global Test and Demod assembly measures these by digitizing the 700 kHz IF signal and using high speed DSP hardware and algorithms. The DSP hardware must be “armed” and then “triggered” to synchronize with the incoming modulation signal. These various trigger signals are shown on Block Diagram 1 and the operation of these is described in the HP/Agilent 8922 Users Guide.

The results of these measurements are displayed using the DSP ANL screen on the HP/

Agilent 8922. The digital data information is also used by the HP/Agilent 8922E/F/G/H to setup and maintain a call with a GSM mobile phone. This is done in “real time” as the HP/

Agilent 8922E/F/G/H and mobile phone simultaneously send and receive from each other.

A18 Spectrum Aanalyzer

The A18 Spectrum Analyzer assembly receives the 114.3 MHz signal from the A16

Receiver assembly. The analyzer can only view frequency spans up to 4 MHz due to the bandwidth of this input signal. A phase lock loop inside the spectrum analyzer is used to downconvert the 114.3 MHz signal which is then amplified, filtered, and detected. The synchronization signal for the display is controlled by the A19 Measurement assembly.

This causes the PLL signal to sweep across the frequency span selected. In addition to normal spectrum analysis, the HP 8922 spectrum analyzer is used to help measure the amplitude profile of the pulsed GSM signal. The upper 30 dB of the pulse envelope is accurately determined by the A9 Global Test and Demod assembly, however, the lower level portions of the pulse amplitude is measured with the wide dynamic range of the A18

Spectrum Analyzer assembly.

This internal spectrum analyzer is a useful tool to view the incoming RF signal and verify that the A23 Input and A11 Receiver Mixer assemblies are working correctly. The A18

Spectrum Analyzer assembly contains diagnostic test points to verify gain, attenuation, and bandwidth controls. Because of the wide dynamic range of the A18 Spectrum

Analyzer assembly it is used by the diagnostics to measure pulse on/off ratio of the A12

Pulse Attenuator assembly.

A2 Audio Analyzer 2 A3 Audio Analyzer 1

These modules are leveraged from an earlier product, the HP/Agilent 8920A, which is primarily an analog communications test set. Many of the audio circuits in these assemblies are not used by the HP/Agilent 8922 and will not be covered in this discussion.

Refer to the HP/Agilent 8920A Assembly Level Repair manual if further detail on these modules is required.

For the HP/Agilent 8922, the primary function of these assemblies is to provide the oscilloscope functions. The HP/Agilent 8922 contains no specialized oscilloscope module, only these two analyzer assemblies and the A19 Measurement assembly. These

14-7


Block Diagram 1 two analyzer modules provide gain, attenuation, and distribution functions of the audio signals. The A19 Measurement assembly does the actual voltage measurement. The interconnection of these modules is shown on Block Diagram 1.

The diagnostics for these modules are extensive. Like the hardware, the diagnostics have been leveraged from the HP/Agilent 8920A and test more of the circuits than are actually used in the HP/Agilent 8922. The diagnostic output from these modules documents the exact circuits in the modules which are tested.

14-8


Block Diagram 2

Block Diagram 2

RF Generator

AF Generator

A15 Reference

The A15 Reference assembly contains the circuits necessary to generate reference signals for the other assemblies in the HP/Agilent 8922. The A15 Reference assembly can be locked to an external signal of 1, 2, 5, 10 or 13 MHz or can operate without an external reference by using its own 10 MHz TCXO.

An optional high stability oscillator (Option 001) is available for the HP/Agilent 8922 that provides a more accurate and stable reference. The output from this oscillator is routed to the rear panel, where it must be connected to the Reference Input for the HP/Agilent 8922 to lock onto this signal. The frequency of the (optional) high stability timebase is adjusted with a screwdriver while the (standard) internal Temperature-Compensated Crystal

Oscillator (TCXO) is adjusted by setting internal DAC values. Both of these adjustments are thoroughly explained in chapter 7, Adjustments and Calibration.

If the A15 Reference assembly is replaced, an error message “Frequency Reference

Calibration Lost” will be seen during instrument power-up. It is necessary to perform the adjustment for the internal TCXO to remove the error message and restore calibrated operation.

A special feature of the A15 Reference assembly is the ability to offset all reference signals in the HP/Agilent 8922. The amount of offset can be set by the user by changing the A15 Reference assembly DAC value. The primary screen to control operation of the

A15 Reference assembly is the Configure Screen; refer to the Users Guide for a more complete discussion on the operation of the Reference section.

Diagnostic procedures for the A15 Reference assembly check lock detectors to make sure that the internal loops are locked, and level detectors to check if RF power is available on key reference signals. The diagnostics cannot check the frequency accuracy of the internal oscillators.

A5 Premod Filter and NSM

The A5 Premod Filter and NSM assembly contains the necessary circuits to convert the user’s digital input data and clock signals into a GMSK waveform. The inputs to the module are a very accurate 270.833 kHz clock signal and digital TTL level data. On the

HP/Agilent 8922A these two signals are provided directly by the user at the front panel; on the other HP/Agilent 8922’s, these signals are generated by other assemblies.

14-9


Block Diagram 2

Compared to common modulation formats like AM, FM, and phase modulation, the 0.3

GMSK format is more complex and requires special equipment (like the HP/Agilent

8922) to generate and analyze signals. A brief explanation is included here as an overview of the format of 0.3 GMSK.

The 0.3 GMSK format was chosen because it is very efficient in terms of the amount of information that can be transmitted in a given amount of frequency spectrum. To understand 0.3 GMSK, it is necessary to first understand MSK (Minimum Shift Keying).

MSK is phase modulation where the carrier is shifted + or - 90 degrees as each data bit is received. This instantaneous phase shift causes “splatter” in the frequency domain and appears as noise spikes on a spectrum analyzer. This is not a good system for digital communications because it would cause noise in adjacent communication channels. To eliminate this noise, the digital signals are first low-pass filtered to eliminate the instantaneous phase shifts. The filter cut-off frequency chosen was 0.3 times the data rate

270.833 kHz = 81.25 kHz. The shape of the filter chosen was Gaussian, which explains where the “G” in “0.3 GMSK” was derived. The effect of the 0.3 Gaussian filter is to smooth out the sharp digital transitions and causes a more continuous phase modulation that has low spectral splatter.

To further reduce the frequency splattering in the frequency spectrum, the digital input data is “Differentially Encoded”. This means that the modulation (either + or - 90 degrees) is determined by examining the current data input (1 or 0) and deciding if it is the same or different than the previous data bit. If the current data bit is different than the previous bit, the carrier is modulated -90 degrees; if the current data is the same as the previous bit, the carrier is modulated +90 degrees. For example, a series of data…01010101.…, would cause the carrier to be continuously modulated -90 degrees each clock period. Similarly, a series of all 1’s or all 0’s would cause the carrier to be continuously modulated +90 degrees each clock period. This can be seen by viewing the HP/Agilent 8922 output with constant 1 or 0 data input. With modulation turned on, the carrier is “offset” +67.7 kHz.

This is caused because the carrier is modulated at +90 degrees times 270.833 kHz = 67.7

kHz. This also explains the common misunderstanding about why the carrier seems

“offset” when no data is being applied.

Because of ISI (Inter Symbol Interference) caused by the low-pass filtering, the effects of previous data bits can be seen on the RF output. To generate this complex signal, the A5

Premod Filter and NSM uses a shift register to hold the current data bit, as well as the previous 6 data bits. These seven bits are used along with a look-up ROM to find the exact phase output that the HP/Agilent 8922 should generate, given the effects of ISI and 0.3

Gaussian filtering.

This information is given digitally to the NSM (Numerical Synthesis Machine) chip. This

IC is a digital synthesizer that converts the digital input data into a digitally coded analog waveform that can be used to directly drive the A27 DAC/Upconverter assembly to get the correct analog waveform.

The diagnostics program checks the A5 Premod Filter and NSM assembly by making sure the internal loop can lock to an external 270.833 kHz signal. Since the HP/Agilent 8922B and HP/Agilent 8922G clock signals are generated internally in other modules, it may be

14-10


Block Diagram 2

IMPORTANT necessary to do manual troubleshooting to find out if the A5 Premod Filter and NSM assembly is correctly locking to these other clock signals. By using the service screen and viewing the latch (NSM_PMF_CLK), it can be determined if the loop is locked. A “1” on the latch indicates lock, while a “0” indicates no lock. If for some reason the loop is not locked, the generator will exhibit a high frequency and phase error.


This assembly contains the circuits necessary to create a 0.3 GMSK waveform at 13.4

MHz. The inputs to this module are the digital signals from the A5 Premod Filter and

NSM assembly, as well as a 10 MHz reference signal from the A15 Reference assembly.

These two are combined together as shown in Block Diagram 2, to produce the output signal at 13.4 MHz.

An important characteristic of this signal is extremely low phase and frequency error. The output from this module can be accessed using the extender boards in the service kit and measured with either another HP/Agilent 8922 or a downconverter and HP/Agilent

11836A software. The HP/Agilent 11836A software method is recommended if it is necessary to have a highly accurate measurement.

The diagnostics procedure for this module only checks that an RF signal is present on the output. This output is fed into the A25 Sum Loop assembly where the signal is translated up to the RF frequency that was selected on the front panel.

A26 Step Loop A

This assembly creates RF reference signals from 486.6 MHz to 1016.6 MHz spaced 100 kHz apart. These signals are derived from a 1 MHz output from the A15 Reference assembly and digital inputs from the A33 Hop Controller assembly. The HP 8922 has the ability to change RF frequencies very quickly. This is necessary because the radios and base stations change frequencies and the HP/Agilent 8922 must be able to change along with them. The A33 Hop Controller assembly controls which frequency the A26 Step

Loop A assembly will create. Most radio and base station testing is done at carrier frequencies near 900 MHz. For these frequencies, the A26 Step Loop A assembly output is approximately 13.4 MHz lower than the RF output that was selected.

A26 Step Loop A and A17 Step Loop B assemblies have exactly the same hardware and can be interchanged if necessary.

The A25 Sum Loop assembly is adjusted to match the A22 Step Loop A assembly. If either the A25 Sum Loop or A26 Step Loop A assembly is changed, it is necessary to readjust the A25 Sum Loop using the instructions in chapter 7,

Adjustments and Calibration.

14-11


Block Diagram 2

To speed up the operation during frequency changes, a Sum Loop pretune line is provided by the A26 Step Loop A assembly and drives the A25 Sum Loop assembly. This pretunes the VCO in the A25 Sum Loop assembly to allow it to lock more quickly as the A26 Step

Loop A and A27 DAC/Upconverter assemblies change frequencies.

The diagnostics procedures check the A26 Step Loop A assembly at various frequencies but can only verify operation during static (non-hopped) operations. If the instrument meets its specifications during static operation but fails during frequency hopping, it may be that the A25 Sum Loop or A26 Step Loop A assemblies are slow to lock-up to the correct new frequency. The error might appear as a high phase or frequency error at the beginning of a new frequency hop, or the instrument may occasionally lose lock during a frequency hop. These might be symptoms of a mis-adjusted A25 Sum Loop or possibly a faulty A26 Step Loop A or A25 Sum Loop assembly.

A25 Sum Loop

This assembly contains the circuity to add together the CW signal from the A26 Step Loop

A assembly and the modulated signal from the A27 DAC/Upconverter assembly. A pretune line is provided from the A26 Step Loop A assembly to speed up the ability of the

A25 Sum Loop A assembly to phase lock. The output from this assembly is a 0.3 GMSK modulated signal at 500 to 1000 MHz, depending on the frequency that was selected.

The A25 Sum Loop assembly is adjusted to match the tuning characteristics of the A26

Step Loop A assembly. Whenever either of these two assemblies are changed, it is necessary to re-adjust the A25 Sum Loop assembly using the procedures in chapter 7.

The diagnostic program checks the A25 Sum Loop assembly at various frequencies but can only verify operation during static (non-hopped) operations. Measurements are made to determine if the A25 Sum Loop assembly can phase lock and that RF power is available on the output. If the instrument meets its specifications during static operation but fails during frequency hopping, refer to the previous discussion about the A26 Step Loop A assembly.

A13 Output

The main purpose of this assembly is to provide the ability to translate the RF signal from the A25 Sum Loop assembly to different frequency bands and to amplify the RF level. For frequencies between 500 MHz and 1000 MHz, the path through the A13 Output assembly is “straight through” and the RF frequency remains constant. A “divide by 2” is used to create output frequencies from 250 MHz to 500 MHz. For frequencies below 250 MHz, a heterodyne section is used to mix the frequencies down to the desired output frequency.

In addition to frequency translation and level correction, the A13 Output assembly provides AM modulation capabilities. The connections into and out of the A13 Output assembly are shown on Block Diagram 2.

The diagnostic procedures verify the tracking filters, ALC loop controls and, DAC values, and measure RF output power at various frequency and power settings.

14-12


Block Diagram 2

A12 Pulse Attenuator

In addition to 0.3 GMSK modulation, the RF signals must also be pulse modulated because the GSM system uses TDMA (time division multiplexing). The function of the

A12 Pulse Attenuator assembly is to pass the RF output signal with 0 dB, 30 dB or > 80 dB of attenuation. The A12 Pulse Attenuator assembly allows “straight through” operation to simulate the RF carrier ON or it provides >80 dB of attenuation to turn the RF carrier

OFF. In addition to these two functions, the A12 Pulse Attenuator assembly can provide a calibrated 30 dB of attenuation. This is used to test a radios ability to recover a weak signal with other high power signals in adjacent time slots.

The diagnostics procedures check this assembly by using the internal RF spectrum analyzer. The pulse attenuator itself is solid state and highly reliable. Diagnosing the attenuator requires many other assemblies in the HP/Agilent 8922. Diagnostic failures of the Pulse Attenuator could also be caused by the A23 Input, A11 Receiver Mixer, A16

Receiver, A17 Step Loop B, or A18 Spectrum Analyzer assemblies, or a missing LO cable on the rear panel (early instruments).

A23 Input

A24 High Power Attenutor

The A23 Input assembly is both the input for the Signal Analyzer section and the final output from the Signal Generator section. For additional information on how the A23

Input assembly is used in the signal analyzer, refer to the Block Diagram 1 discussion.

The RF output signal is received from the A12 Pulse Attenuator assembly. The A23 Input assembly has a step attenuator (5 dB/step) that can attenuate the RF signal up to 125 dB.

The A23 Input assembly also contains a switch to select the proper output port. For high output levels, the port AUX RF OUT is available. For most operations, the RF signal is routed to the RF IN/OUT port and connected directly to a radio or transmitter. The radios are “duplex”, meaning they simultaneously transmit and receive at different frequencies.

The most common setup is to have the HP/Agilent 8922 Signal Generator routed to the RF

IN/OUT connector to simulate a base station and is “transmitting” to the radio-under-test.

At the same time, the radio-under-test is “transmitting” to the HP/Agilent 8922 Signal

Analyzer at a frequency offset by 45 MHz. This signal comes in the HP/Agilent 8922 RF

IN/OUT connector and is routed to the Signal Analyzer section.

The 14 dB (8 dB with the HP/Agilent 8922F,H,M,S) A24 High Power Attenuator assembly is shown on Block Diagram 1 inside the A23 Input block. It is actually external to the Input Module and provides 14 dB attenuation of all signals going into or coming out of the RF IN/OUT connector on the front panel.

Diagnostic procedures individually check that all the step attenuator switches provide attenuation, although the accuracy of this measurement is limited. A connectivity check is provided with the diagnostics to verify the connections going into and out of the A23

Input assembly. This section is the most likely cause of output level accuracy problems, especially “hard failures” where the output is incorrect by 5 to 20 dB (indicating an attenuator pad has failed).

14-13


Block Diagram 2



These modules are leveraged from an earlier product, the HP/Agilent 8920A, which is primarily an analog communications test set. Many of the audio circuits in these assemblies are not used by the HP/Agilent 8922 and will not be covered in this discussion.

Refer to the HP/Agilent 8920A Assembly Level Repair manual if further detail on these modules is required.

For the HP/Agilent 8922, the function of the A6 Signaling Source/Analyzer is simply to create sinusoidal audio signals. The analyzer capabilities of this module are not used in the

HP/Agilent 8922. The A4 Modulation Distribution assembly provides gain, attenuation, and distribution functions of these audio signals as well as the AM/Speech input from the front panel. The interconnection of these modules is shown on Block Diagram 2.

The diagnostic procedures for these modules are extensive. Like the hardware, the diagnostics have been leveraged from the HP/Agilent 8920A and test more of the circuits than are actually used in the HP/Agilent 8922. The diagnostic output from these modules documents the exact circuits in the modules which are tested.

14-14


Block Diagram 3 HP/Agilent 8922B Only

Block Diagram 3

HP/Agilent 8922B Only

The HP/Agilent 8922B contains 3 modules: A35 “B” Reference; A36 FIFO/GPIO; and

A37 Sequence Controller assemblies that are not used in either the HP/Agilent 8922A or

HP/Agilent 8922G. The function of these three modules can only be controlled using the rear panel GPIO connector (found only on the HP/Agilent 8922B) and the special control software that is supplied with the HP/Agilent 8922B. At power-up, the HP/Agilent 8922B appears to be an “A” version and should respond exactly the same as an HP/Agilent

8922A. The overall operation of the HP/Agilent 8922B is to buffer and synchronize data from an external computer. This data is then transmitted by the HP/Agilent 8922

Generator hardware. The internal connections of this hardware are illustrated in Block

Diagram 3.

To the user at the front panel and for the memory card diagnostics, the instrument appears to be an HP/Agilent 8922A. Any signals that are generated by the HP/Agilent 8922B hardware appear as “external” for the control settings.

For diagnosing problems with these modules, it is necessary to use the HP/Agilent 8922B software. The software contains testing routines that load the buffers with data and read the data back. The software is also necessary to control the switches and circuits within the modules.

A35 “B” Reference

This module contains the VCO and divider circuits necessary to lock to most common reference frequencies used for GSM radio testing. These include 1, 2, 5, 10, and 13 MHz, as well as 270.833 kHz data rate clock and 216.667 kHz frame rate clock. The frequency must be selected using the software provided with the HP/Agilent 8922B.

This module provides a 10 MHz signal to the rear panel and a 270.833 kHz signal to the

A37 Sequence Controller assembly.

A36 FIFO/GPIO

The A36 FIFO/GPIO assembly has 2 primary functions. The first is to communicate through the GPIO bus to an external controller and relay these control signals to the other

HP/Agilent 8922B modules. To control any of the HP/Agilent 8922B modules it is necessary that the A36 FIFO/GPIO assembly communications are working correctly. The second function of the A36 FIFO/GPIO assembly is to store and send the digital data information that is “transmitted” by the RF Generator portion of the HP/Agilent 8922. The diagnostic software has a FIFO RAM test to verify that the hardware can send and receive data from the external computer.

14-15


Block Diagram 3 HP/Agilent 8922B Only

A37 Sequence Controller

The A37 Sequence Controller assembly contains the switches which cause an HP/Agilent

8922B to function like an HP/Agilent 8922B instead of an HP/Agilent 8922A. Activating the switches causes the Clock, Data, Pulse Modulation, and Frequency Hop data to be generated using the HP/Agilent 8922B modules.

The 270.833 kHz clock and data signals, which are normally routed from the front panel, are now received from the A36 FIFO/GPIO assembly with the clock and data all properly synchronized. The pulse modulation and frequency hop information from the external computer is stored in the A37 Sequence Controller assembly, where it is synchronized and routed to the signal generator portion of the HP/Agilent 8922B to be transmitted.

Like the A36 FIFO/GPIO assembly, the HP/Agilent 8922B software also contains a Frame

Control RAM test, and a HOP RAM test, to verify the ability of the external computer to read and write to the A37 Sequence Controller assembly.

14-16


Block Diagram 4

Block Diagram 4

This block diagram illustrates the assemblies that are unique to the HP/Agilent 8922E/F/

G/H. These modules are primarily digital and represent the hardware necessary to create the digital protocol to set up and maintain a phone call with a GSM mobile phone. A special diagnostics “loopback” program is included on the diagnostic memory card. This program causes the HP/Agilent 8922E/F/G/H to set up a phone call to itself (loopback), and measure the bit error rate. This exercises most of the digital hardware and gives a high confidence that the A31 CODEC, A32 GSM Controller, and A34 GSM RTI assemblies are operating correctly.

A31 CODEC

A32 GSM Controller

A34 GSM RTI

The A31 CODEC assembly provides the speech processing (coding and decoding) to convert the analog speech to and from the GSM format. This assembly also provides many of the real time channel processing functions that keeps the HP/Agilent 8922G synchronized with the mobile radio.

Overall control of the A31 CODEC, A32 GSM Controller, and A34 GSM RTI assemblies is provided by the A32 GSM Controller assembly. This A32 assembly interfaces with the main controller (A7) for communication with the remainder of the instrument. The A32

GSM Controller assembly also communicates with the Option 003 A35 Protocol Interface assembly.

The A34 GSM RTI (Real Time Interface) assembly provides the logic and switches to interface the data, clock and synchronization signals into the analog RF generator and RF analyzer hardware. This assembly replaces a jumper board (A34 in the HP/Agilent 8922A instrument) which allows it to access external signals from the front and rear panel, as well as provide key signals to the A33 Hop Controller assembly and A5 Premod Filter/NSM assembly.

A35 Protocol Interface (HP/Agilent 8922F/HM/S Option 003 Only)

This assembly buffers the digital signal from the A32 GSM Controller assembly to the rear panel where it can be connected to a protocol analyzer. This option allows a user to view the messages that are passed over the communication channel between the radio and the HP/Agilent 8922F/H.

14-17


Block Diagram 5

Block Diagram 5

This block diagram illustrates the busses that interconnect the instrument controllers (A7

Controller, A32 GSM Controller, A34 GSM RTI, and A37 Sequence Controller) with the other assemblies. Chapter 5 “Troubleshooting the Controller/Display” contains information about troubleshooting and an explanation of the serial and parallel busses that interconnect the assemblies.

A19 Measurement

The A19 Measurement assembly contains the circuits necessary to measure voltage and count frequency. These circuits are interconnected throughout the instrument with a series of multiplexers. The measurement board also synchronizes the measurements for the spectrum analyzer and the oscilloscope display. The block diagram shows the pin numbers and signal names of most voltage and counter inputs to this assembly.

While there are no specific diagnostics for the A19 Measurement assembly, it is used extensively to diagnose other parts of the instrument. If the diagnostics incorrectly indicate a faulty assembly, the measurement board may be a likely cause. Use the pin number information to verify that the voltages and frequencies are properly transferred from the modules to the A19 Measurement assembly.


The A33 Hop Controller assembly controls the I/O to most analog and RF hardware in the instrument. Problems with this assembly will usually appear as multiple failures during the power up diagnostics (as indicated on the A7 LED’s). The A33 Hop Controller assembly communicates to the main controller (A7 Controller) with a parallel bus, and through a serial bus to the other analog hardware. This illustration is included with pin numbers to allow troubleshooting the serial busses and communication failures to the modules. Again, no specific memory card diagnostics exist for this module. It is unlikely that memory card programs could be executed if the A33 Hop Controller assembly is defective.

To understand more about the serial and parallel busses connected to the A33 Hop

Controller assembly, refer to the chapter 5 discussion.

14-18

15

Diagnostics Theory

15-1

Diagnostics Theory

Introduction

Introduction

This chapter describes what is tested by the memory card based or ROM based diagnostics and how to interpret the level of certainty that is attached to failure reports. This chapter is broken into sections for each of the diagnostic tests and a section for how to interpret results.

This chapter uses the current diagnostic test names for firmware revision code A.03.00 and above. Memory card based diagnostic test names may differ from the current names.

15-2

Diagnostics Theory

AF_DIAGS

AF_DIAGS

Audio Frequency Generators 1 and 2

This test checks the A6 Signaling Source/Analyzer assembly. As a test signal, a digital “1” exercises DACs on the output of the A6 Signaling Source/Analyzer assembly to verify voltage range, using the voltmeter at the LFS1_VM and LFS2_VM outputs.

Preliminary Audio Paths

This test checks the A4 Modulation Distribution assembly. The 9 possible paths through the A4 Modulation Distribution assembly are checked using signals from the A6

Signaling Source/Analyzer assembly, routing the signals to the voltmeter through the A3

Audio Analyzer 1 assembly at AUD1_VM, or the A2 Audio Analyzer 2 assembly at

AUD2_VM, for path 9.

Modulation Distribution Internal Paths

This test checks the A4 Modulation Distribution assembly. Using the two inputs from the

A6 Signaling Source/Analyzer assembly, the same paths as the Preliminary Audio Paths test are checked again. During the test the gain and attenuation of the paths are varied.

Modulation Distribution External Paths

This test checks the A4 Modulation Distribution assembly. Using the AFG1 output from the A6 Signaling Source/Analyzer assembly, the external MODULATION IN AM/

SPEECH path through the A4 Modulation Distribution assembly is checked. The AFG1 input is checked first to verify that it can be used as a test signal. An external connection is used to route the AUDIO OUT connector on the front panel to the MODULATION IN

AM/SPEECH connector. The gain and coupling of the path are varied. The signals are routed from the MOD_MON output of the A4 Modulation Distribution assembly to the

A3 Audio Analyzer 1 assembly for routing to the voltmeter through the AUD1_VM output.

15-3

Diagnostics Theory

AF_DIAGS

Audio Analyzer 1 Internal Paths

This test checks the A3 Audio Analyzer 1 assembly. Using the AFG1 output of the A6

Signaling Source/Analyzer assembly (through the A4 Modulation Distribution assembly), the 12 internal paths of the A3 Audio Analyzer 1 are checked. Two of the paths are not used in the HP/Agilent 8922 and will be shown as “No optional high(low)-pass filter sensed”. (Ignore this error message on this test.) Paths 1 through 4 are routed directly to the voltmeter through the AUD1_VM output, while paths 5 through 12 are routed to the peak detector in the A2 Audio Analyzer 2 assembly before being routed to the voltmeter through the AUD2_VM output. The gain and coupling are varied and each path is checked.

Audio Analyzer 1 External Paths

This test checks the A3 Audio Analyzer 1 assembly. The front panel AUDIO IN path is selected and de-selected while using an external connection from the front panel AUDIO

OUT connector (which uses the AFG1 output from the A6 Signaling Source/Analyzer routed through the A4 Modulation Distribution assembly). The signal is routed to the voltmeter through the AUD1_VM output.

Audio Analyzer 2

This test checks the A2 Audio Analyzer 2 assembly. Using the AFG1 output from the A6

Signaling Source/Analyzer assembly routed through the A4 Modulation Distribution assembly to the MOD_MON output, the 14 paths through the A2 Audio Analyzer 2 are checked. Each of the measurements go directly to the voltmeter through the AUD2_VM output.

15-4

Diagnostics Theory

RF_DIAGS

RF_DIAGS

Reference

This test checks the A15 Reference Section assembly.

10 MHz Lock Detector State

The 10 MHz VCO is measured using the counter; however, the counter uses the reference so the measurement is an indication that the counter is working. This verifies that both the reference and the count signal are reaching the counter.

1 GHz Oscillator Lock Detector State

The 1 GHz VCO lock detector is checked for lock.

1 GHz and 500 MHz Level Detectors

The 1 GHz and 500 MHz level detectors are checked to test for signals from these outputs.

10 MHz Fine and Coarse DACs State

The 10 MHz VCO is checked for locks at both ends of the tune DAC range.

NSM and Pre-Modulation Filter

This test checks the A5 Premod Filter and NSM assembly.

NSM Clock Detector State

The presence of a clock is checked.

Pre-Modulation Filter Clock Detector State

The Premod filter clock is checked for lock with both a clock present and not present. The front panel AUDIO OUT is used as a test clock. It is connected to the front panel

MODULATION CLOCK input.

DAC and Up-Converter

This test checks the A27 DAC/Upconverter assembly.

Detector Output Level

This test checks for an output at several frequencies using the voltmeter at the AUX4_VM output.

15-5

Diagnostics Theory

RF_DIAGS

RF Generator Step Loop

This test checks the A26 Step Loop A assembly.

RF Generator Loop 1 MHz Reference Detector

This test checks for the presence of a reference.

RF Generator Loop Lock Detector State

The lock detector is checked at several frequencies.

RF Generator Loop Output Detector

The level detector is checked at several frequencies.

Sum Loop

This test checks the A25 Sum Loop assembly.

RF Generator Sum Loop Lock Detector State

This test checks the lock detector at several frequencies.

RF Generator Sum Loop VCO Tuning Level

This test checks the VCO tune voltage at several frequencies.

Output Section

This test checks the A13 Output assembly.

Power Supplies and Amplifier Bias

The +8 Vdc supply generated by the A13 Output assembly is measured by the voltmeter at the OUT_POS_8V output. The -6 Vdc supply generated by the A13 Output assembly is measured by the voltmeter at the OUT_NEG_6V output. The bias voltage on the output amplifier is measured by the voltmeter at the OUT_AMP_BIAS output.

Carrier Level DAC

The carrier level DAC is checked first by turning on each bit one at a time and then with all the bits on, measuring with the voltmeter at the OUT_LEVEL_REF output. The limits are based on the value of the -6 Vdc measurement.

Filter Tune DAC

The filter tune DAC is checked the same way the carrier level DAC is checked at the

OUT_TUNE_FILTER output.

15-6

Diagnostics Theory

RF_DIAGS

Open Loop ALC Drive

This test opens the ALC loop and checks the voltage that appears on the output of the modulator with the DAC at full scale, measured at the OUT_ALC_DRIVE using the voltmeter referenced to the -6 Vdc measurement.

Output Detector, Detector Caps

The output capacitors are switched in and out and the output level is measured by the voltmeter at the OUT_OUTPUT_LEVEL output.

Output Detector, Low Level

When the carrier level DAC is set to 0, there should be no RF output detected by the voltmeter measuring at the OUT_OUTPUT_LEVEL output.

Output Frequency Range, Loop Closed

The frequency is varied and the detector voltage is measured by the voltmeter at the

OUT_OUTPUT_LEVEL output.

Bandwidth Control

The bandwidth control bits are varied and the detected output is measured by the voltmeter at the OUT_OUTPUT_LEVEL output.

Tracking Filter Rejection

The ALC loop is opened and the tracking filters are checked by setting the RF frequency to the center of the two bands while changing the filter DAC to below the RF frequency and measuring the detected level with the voltmeter at the OUT_OUTPUT_LEVEL output.

Pulse Attenuator and Drive

This test checks the A14 Pulse Driver assembly.

Pulse Attenuator and Drive Test

A reference measurement is made and the signal is pulsed using the front panel AUDIO

OUT to drive the front panel MODULATION IN PULSE input.

13 MHz Oscillator Lock Detector

The 13 MHz VCO lock detector is measured to check the 13 MHz VCO.

Input Section

This test checks the A23 Input assembly.

15-7

Diagnostics Theory

RF_DIAGS

RF Detectors 1

The low and high sensitivity detectors are checked both with and without a signal present.

Step Attenuator

The step attenuator is checked by switching in one pad at a time.

RF Detectors 2

The filter output detector is checked with no signal present.

Filter Output Detector, Signal Present

The filter output detector is checked with a signal present at different frequencies.

Output Filter Rejection

Each filter is checked to see that it rejects frequencies outside its passband.

Output Variable Attenuator

The variable attenuator is checked by programming the DAC to full scale, then reading the voltage on the output detector. Then the DAC is programmed to values which turn on the 5 most significant bits one at a time, starting with the MSB and measuring the detector output each time.

Autorange Attenuator

The autorange attenuator is programmed to each of its possible values and the output detector is measured each time.

Counter With TTL Dividers

The signal from the RF generator is routed to the counter TTL prescalers. The frequency of the signal is set to all values between 10 and 250 MHz in 5 MHz steps.

Counter With ECL Dividers

The signal from the RF generator is routed to the counter ECL prescalers. The frequency of the signal is set to all values between 50 and 1000 MHz in 50 MHz steps.

Temperature Sensor

The temperature sensor produces a DC voltage proportional to the internal temperature.

RF Analyzer Step Loop

This test checks the A17 Step Loop B assembly.

15-8

Diagnostics Theory

RF_DIAGS

RF Analyzer Loop 1 MHz Reference Detector

This test checks for the presence of the 1 MHz reference.

RF Analyzer Loop Lock Detector

This test checks the loop for lock at several frequencies.

Loop B Output Detector

This test checks the level detector at several frequencies.

Spectrum Analyzer

This test checks the A18 Spectrum Analyzer assembly.

Detector Output

The RF generator is routed externally to the spectrum analyzer through the AUX RF OUT and AUX RF IN front panel connectors. The level is set to a very low level (-100 dBm), and the spectrum analyzer detector is measured.

Stepped Gain

The stepped gain amplifiers are check using a 0 dB measurement as a reference. The steps are then measured one at a time using the detector.

IF Bandwidth

The IF bandwidth is set to all possible values and the voltage is measured by the detector.

Filter Rejection

The LO frequency is set at 10 times the bandwidth away from the center frequency of each filter, then the detector is read.

Variable Gain IF Amplifier

The variable IF gain amplifier is checked by turning on one bit of the control DAC at a time, starting with the LSB. The detector is checked as each bit is turned on.

RF Input Signal

With the internal calibration signal disabled, the RF generator and RF analyzer are set to

100 MHz for an IF of 114.3 MHz at the input of the spectrum analyzer. The signal is routed internally through the coupler on the RF IN/OUT port of the A23 Input assembly and the level is measured.

Receiver

This test checks the A16 Receiver assembly.

15-9

Diagnostics Theory

RF_DIAGS

Down Converters (With Spectrum Analyzer) Test

The RF generator is fed to the receiver IF through the A23 Input and A11 Receiver Mixer assemblies to the second mixer in the receiver. The signal is measured by the spectrum analyzer at three frequencies at the SA_114.3M output.

IF Counter Test

The signal is measured again after the third mixer and FM discriminator at the IF_CNT output by the counter.

AGC Open Loop (At AM Output) Test

The AGC open loop operation is checked at both high and low levels at three DAC level settings. The signal is measured after the pulse detector at the DEMOD_AUD output. This

DC level represents the IF level.

AGC Closed Loop (At AM Output) Test

The AGC loop is closed and the level at the DEMOD_AUD output is measured again with both AM and Pulse selected.

AGC Reference DAC Test

The AGC loop is opened and the closed loop level DAC is measured by the voltmeter at the AUX7_VM output.

AGC Open-Loop Drive DAC Test

The AGC loop is opened and the open loop level DAC is measured by the voltmeter at the

AUX7_VM output.

Temperature Test

The temperature sensor is measured by the voltmeter at the AUX7_VM output.

AM Demodulator Test

The AUDIO OUT source is routed to the MODULATION IN AM/SPEECH connector externally to produce an AM signal and the demodulated AM is measured at the

DEMOD_AUD output by the voltmeter through the A3 Audio Analyzer 1 assembly.

FM Demodulator Test

The FM demodulator is measured statically by changing the RF generator frequency by a small amount and measuring the DC voltage change at the output of the FM demodulator at the DEMOD_AUD output by the voltmeter through the A3 Audio Analyzer 1 assembly.

15-10

Diagnostics Theory

MS_DIAGS

MS_DIAGS

External Reference

Ext Reference Present Detector

The external reference detector is read.

Ext Reference Lock Detector

The 10 MHz loop lock detector is read. Ext Reference Lock Out; the external reference lock out is checked by locking out the external reference and checking the external reference lock detector.

RF Input/Output

RF In/Out to Aux RF Out Test

Using an external connection, the power is measured using the CW/AF Analyzer.

Aux RF Out to Aux RF In

Using an external connection, the filter output detector level is measured by the voltmeter through the voltmeter multiplexer.

Instrument Self Test

The power-up self tests are invoked internally.

Power Supplies On Measurement Board

The power supply sense points on the A19 Measurement assembly are read.

15-11

Diagnostics Theory

GSM and DCS Diagnostic Tests

GSM and DCS Diagnostic Tests

Each of these tests performs a functional check on the instrument by generating a test signal and looping the signal back to the measurement hardware.

The tests with titles beginning with E are for use with an HP/Agilent 8922E. Tests with titles beginning with G are for use with an HP/Agilent 8922G. Tests without an E or G prefix are used with the HP/Agilent 8922F/H/M/S.

The HP/Agilent 8922E/G DCS tests, EDCSDIAG and GDCSDIAG check instruments that have an HP/Agilent 83220A installed. The HP/Agilent 8922E/G GSM tests

EGSMDIAG and GGSMDIAG are used for instruments without an HP/Agilent 83220A installed. The HP/Agilent 8922F/H/M/S diagnostic test are also in two forms. GSMDIAG checks the HP/Agilent 8922F/H/M/S. The diagnostic test DCSDIAG tests either the HP/

Agilent 83220A or the HP/Agilent 83220E, which ever instrument is installed.

Using internal routing and generation, a known bit pattern is modulated and sent to the

AUX RF OUT port of either the HP/Agilent 8922E/F/G/H or the HP/Agilent 83220A.

With an external connection made to the RF IN/OUT port the instrument demodulates the signal and performs a BER measurement and DSP measurement. This test provides a functional test of the assemblies that can not be checked directly as with the other diagnostic tests. The assemblies checked include the A31 CODEC, the A32 GSM

CONTROLLER, and the A34 GSM RTI. The HP/Agilent 83220A can be further verified for failure by disconnecting it and running the appropriate GSM test on the HP/Agilent

8922E/F/G/H/M/S. This will show whether the instrument still fails without the HP/

Agilent 83220A. The HP/Agilent 83220E diagnostic tests are less extensive.

15-12

Diagnostics Theory

Interpreting Results


When a failure occurs, a message is displayed showing the number of failures and the probability that the failure is caused by the assembly being tested. If the probability is not high, more measurements may be necessary to verify the failure.

The probability assigned is based on the following criteria:

Low: A failure occurred, but the signal being used for the measurement originates in another assembly and has not been previously tested on this assembly. Low probability is also assigned for the first measurement made to an assembly.

Medium: A failure occurred and the signal being used for the measurement originates in another assembly and has already been measured good, but the measurement mux

(multiplex) point or digital detector has not previously been used.

High: A failure occurred and the signal being used for the measurement originated in another assembly and has already been measured good, and the measurement mux point or digital detector has already been used.

The RF diagnostics assign probability based on the first failure that occurs. The audio diagnostics assign probability based on a series of measurements.

15-13

Diagnostics Theory



15-14

16

Measurement Theory

16-1

Measurement Theory

Introduction

Introduction

This chapter describes which blocks of the instrument are used in the various measurements. The measurements described include the following:

• BIT ERROR

• DSP ANL

• OUT RF SP

• PULSE

• CW MEAS/AF ANL

• SCOPE

• SPEC ANL

The descriptions are given in terms of which path the signal under test takes from the front panel to the measurement point. This chapter does not describe how a radio under test is stimulated to output the signals that are being measured.

BIT ERROR

• A23 Input

• A11 Receiver Mixer

• A16 Receiver

• A9 Global Test and Demod

• A31 CODEC

The bit error test is a test where a known data pattern is sent to the radio under test and is looped back to measure how many errors are generated by the radio under test through receiving and transmitting the same data. The Bit Error test signal is routed through the front-panel and through the RF hardware. The signal is demodulated at the A9 Global Test and Demod assembly. After the signal is demodulated the recovered clock and data signals are routed to the A31 CODEC assembly. The A31 CODEC assembly both generates the test data pattern and does the comparison after the data is recovered after being transmitted and received. After the measurement is done the measurement numbers are sent to the A7 controller to be sent to the display section.

16-2

Measurement Theory

Introduction

DSP ANL

• A23 Input


• A16 Receiver

• A9 Global Test and Demod

The DSP analyzer measurements digitally analyze the signal under test. The signal is leveled and converted to a 10.7 MHz IF and routed to the A9 Global Test and Demod assembly where the signal is digitized and the actual measurements are made. After the measurement is done the measurement numbers are sent to the A7 Controller to be sent to the display section.

OUT RF SP

• A23 Input


• A16 Receiver

• A18 Spectrum Analyzer

• A19 Measurement

The output RF spectrum is a GSM required measurement that is a zero span spectrum analyzer measurement at specific offsets from the carrier frequency. Refer also to the

SPEC ANL description.

PULSE

• A23 Input


• A16 Receiver


• A19 Measurement

The pulse measurement is used to measure the

−

70 dB point of a GSM pulse because the

DSP analyzer will only measure to

−

30 dB. This is a spectrum analyzer measurement.

Refer also to the SPEC ANL description.

16-3

Measurement Theory

Introduction

CW MEAS/AF ANALYZER

• A23 Input

• A19 Measurement


• A16 Receiver

• A3 Audio Analyzer 1

• A2 Audio Analyzer 2

• A4 Modulation Distribution

The CW measurements are power and frequency. For the power measurement, the detector is in the A23 Input assembly and is measured by the voltmeter in the A19 Measurement assembly. The AF analyzer measurements are either demodulated signals that pass through the A23 Input, A11 Receiver Mixer, and A16 Receiver assemblies or internal and external audio signals that pass through the A4 Modulation Distribution assembly before being routed to the A3 Audio Analyzer 1 assembly. The A3 Audio Analyzer assembly either passes the signals to the A19 Measurement assembly or to the A2 Audio Analyzer 2 assembly before routing to the A19 Measurement assembly. After the measurement is done the measurement numbers are sent to the A7 Controller to be sent to the display section.

SCOPE

The oscilloscope has the AF analyzer as a front end so the routing configurations that can be done for the AF ANALYZER are also possible for oscilloscope measurements. The

A19 Measurement assembly makes the oscilloscope measurements. After the measurement is done the measurement numbers are sent to the A7 Controller to be sent to the display section.

SPEC ANL

• A23 Input


• A16 Receiver


• A19 Measurement

The spectrum analyzer signal receives its signal from the RF input stages after the signal is converted to a 114.3 MHz IF in the A16 Receiver assembly. The A18 Spectrum Analyzer assembly works together with the A19 Measurement assembly. The A18 Spectrum

Analyzer receives sweep and trigger signals from the A19 Measurement assembly and returns analog level signals to the A19 Measurement assembly. The A19 Measurement

16-4

Measurement Theory

Introduction assembly digitizes the signals from the A18 Spectrum Analyzer assembly. After the measurement is done the measurement numbers are sent to the A7 Controller to be sent to the display section.

16-5

Measurement Theory

Introduction


16-6

17

GSM Theory

17-1

GSM Theory

Introduction

Introduction

The HP/Agilent 8922 product family is designed to measure and generate signals for the

GSM digital cellular telephone system. The HP/Agilent 8922 is both a signal generator and a measuring receiver.

This chapter describes GSM system signals that are generated and received by the HP/

Agilent 8922. The GSM system is not described in detail due to complexity. This chapter is intended only to describe the system as it relates to servicing the HP/Agilent 8922, meaning the need to know the character of the signals generated and received.

17-2

GSM Theory

The GSM System

The GSM System

The GSM system uses two frequency bands ranging from 890 to 915 MHz and

935 to 960 MHz. The bands are broken into 125 channels spaced 200 kHz apart.

The GSM system uses one band to transmit and one to receive. The lower frequency band

(890-915 MHz) is used for the Mobile telephone to Base station link; the upper band is for

Base to Mobile.

Channels from each band are used in uplink/downlink channel pairs. The channels in the channel pair are spaced 45 MHz apart.

The GSM system is time multiplexed, meaning that it is pulsed to allow multiple users access to the same channel. On each channel there are eight timeslots so that eight users can be on a channel at the same time. The pulses or timeslots are 576.9

µ

S long.

The GSM system has the capability of being frequency hopped within the frequency bands. This allows the system to hop the telephone to another channel and possibly another timeslot during a telephone call.

The GSM system uses a 0.3 Gaussian Minimum Shift Keying modulation scheme to modulate the digital data onto the pulsed carrier.

The digital data for one pulse is made up of both voice data and predefined data that is used for synchronization. The voice data is coded to maximize speech quality and minimize errors.

For most of the characteristics mentioned above the GSM system contains many variables.

These variables account for the many screens and fields in the HP/Agilent 8922.

17-3

GSM Theory

E-GSM, DCS1800 and PCS1900 Systems

E-GSM, DCS1800 and PCS1900 Systems

GSM900 is the original GSM system, using frequencies in the 900 MHz band and designed for wide area cellular operation. Mobiles with output powers from 1 to 8W are typical. DCS1800 is an adaptation of GSM900. The term GSM can be used collectively to describe the GSM900 and DCS1800 standards. Creating DCS1800 involved widening the bands assigned to GSM and moving them up to 1.8 GHz. The DCS1800 standard was created to allow PCN (Personal Communications Networks) to form.

To avoid confusion, the channel numbers (ARFCN) used for DCS run from 512 to 885.

GSM900 channels run from 1 to 124. With wider frequency allocation, leading to more channels, DCS1800 is able to cope with higher user densities. DCS1800 mobiles are also designed for lower output powers (up to 1W), so cell sizes have to be smaller, meaning even higher densities. In all other respects, GSM900 and DCS1800 are the same.

The GSM phase 2 specifications brings the two systems even closer. GSM900 gets additional bandwidth and channels, called E-GSM (Extended band GSM) and lower power control levels for mobiles, allowing micro-cell operation. These two features allow increased user densities in GSM systems.

PCS1900 is in the band around 2 GHz for a PCS (Personal Communications System).

This version of GSM is variously called DCS1900 or PCS1900. In technical terms

PCS1900 is identical to DCS1800 except for frequency allocation.

17-4

Index

Symbols

”B” Reference theory, 14-15

Numerics

1 GHz and 500 MHz Level Detectors theory, 15-5

1 GHz Oscillator Lock Detector State theory, 15-5

10 MHz Fine and Coarse DACs State theory, 15-5

10 MHz Lock Detector State theory, 15-5

13 MHz Oscillator Lock Detector theory, 15-7

A

A1 part number, 9-4, 9-5 troubleshooting, 5-2

A1 Front Panel removal, 8-7

A10 part location, 9-7

A10 Power Supply Regulator Removal,

8-9

A11 part location, 9-7 part number, 9-6 specs, 12-19 theory, 14-5

A12 part location, 9-7 part number, 9-6 theory, 14-13

A12 Pulse Attenuator Removal, 8-12


Service Kit, 4-5 specs, 12-22 theory, 14-12

A13 Output diagnostics, 15-6

A14 part location, 9-7 part number, 9-6

Service Kit, 4-5 specs, 12-24

A14 Pulse Driver diagnostics, 15-7


Service Kit, 4-5 specs, 12-26

A15 Reference Section diagnostics, 15-5



A16 Receiver diagnostics, 15-9


Service Kit, 4-5 theory, 14-5, 14-11

A17 Step Loop B diagnostics, 15-8

A17,25 specs, 12-53



A18 Spectrum Analyzer diagnostics, 15-9





A2 Audio Analyzer 2 diagnostics, 15-4


Service Kit, 4-5 troubleshooting, 5-2

A21 part location, 9-9 part number, 9-8 troubleshooting, 5-2

A21 HP-IB Interface Removal, 8-14


A22 Display Removal, 8-16

A23 part location, 9-9 part number, 9-8 theory, 14-4, 14-13 troubleshooting, 5-2

A23 (A,B,E,F,G,H) specs, 12-43

A23 (M,S) specs, 12-47

A23 Input diagnostics, 15-7

A23 Input Section Removal, 8-18

A24 part location, 9-9 part number, 9-8 theory, 14-4, 14-13

A24 Attenuator Removal, 8-19



A25 Sum Loop diagnostics, 15-6


Service Kit, 4-5 theory, 14-11

A26 Step Loop A diagnostics, 15-6


Index-1

Index part number, 9-8


A27 DAC/Upconverter diagnostics, 15-5

A28 part location, 9-9 part number, 9-8, 9-10 specs, 12-58

A28 Power Supply Removal, 8-20


A3 part number, 9-6


A3 Audio Analyzer 1 diagnostics, 15-4








A37

Index-2 part location, 9-13 part number, 9-12




A4 Modulation Distribution diagnostics, 15-3



A5 Premod Filter and NSM diagnostics, 15-5



A6 Signaling Source/Analyzer diagnostics, 15-3


Service Kit, 4-5 theory, 14-18 troubleshooting, 5-2

A7 Step Loop B theory, 14-5


Service Kit, 4-5 troubleshooting, 5-2



Adjustments, 9-1 adjustments, 7-2

AF Generator theory, 14-9

AF_DIAGS theory, 15-3

AGC Closed Loop (At AM Output) Test theory, 15-10

AGC Open Loop (At AM Output) Test theory, 15-10

AGC Open-Loop Drive DAC Test theory, 15-10

AGC Reference DAC Test theory, 15-10

All Receiver Mixer Removal, 8-10

AM Demodulator Test theory, 15-10

Assembly and Disassembly Procedures,

8-2

Audio Analyzer theory, 14-4

Audio Analyzer 1


Audio Analyzer 1 External Paths theory, 15-4

Audio Analyzer 1 Internal Paths theory, 15-4

Audio Analyzer 2

Service Kit, 4-5 specs, 12-3 theory, 14-7, 15-4

Audio Frequency Generators 1 and 2 theory, 15-3

Autorange Attenuator theory, 15-8

Aux RF Out to Aux RF In theory, 15-11

B

Bandwidth Control theory, 15-7

BIT ERROR theory, 16-2

Block Diagram 1 theory, 14-4

Block Diagram 2

Index theory, 14-9



Block diagram 5 theory, 14-18

Block Diagram Theory of Operation, 14-

2 block diagrams, 13-2

Detector Output theory, 15-9

Detector Output Level theory, 15-5

Differentially Encoded theory, 14-10

Display troubleshooting, 5-2, 5-5

Down Converters (With Spectrum

Analyzer) Test theory, 15-10

DSP ANL theory, 14-6, 16-2, 16-3

C calibration data, 8-2

Calibration Lost, 14-9 calibrations, 7-2

Carrier Level DAC theory, 15-6

CODEC Assembly theory, 14-17

Controller

Service Kit, 4-5 troubleshooting, 5-2 controller theory, 14-18 counter theory, 14-18

Counter With ECL Dividers theory, 15-8

Counter With TTL Dividers theory, 15-8

CRT Driver troubleshooting, 5-2

CRT Drives

Service Kit, 4-5

CW MEAS/AF ANALYZER, 16-4

CW MEAS/AF ANL theory, 16-2

D

DAC and Up-Converter theory, 15-5

DAC/Upconverter


DCS1800, 17-4

DCS1900, 17-4

E

E-GSM, 17-4 error message, 14-9 error messages, 11-2

Ext Reference Lock Detector theory, 15-11

Ext Reference Present Detector theory, 15-11

External Reference theory, 15-11

F

FIFO/GPIO theory, 14-15

Filter Output Detector, Signal Present theory, 15-8

Filter Rejection theory, 15-9

Filter Tune DAC theory, 15-6

Firmware Location, 9-29

Flash Upgrades, 9-29

FM Demodulator Test theory, 15-10

Frequency Reference, 14-9 fuse, 6-5 fuse board, 6-7 fuseboard, 6-7

G

Global Test and Demod


GMSK, 14-2 theory, 14-6, 14-9

GPIB Interface troubleshooting, 5-2

GSM, 14-2 theory, 17-2

GSM Controller theory, 14-17

GSM Phase 2, 17-4

GSM RTI Assembly theory, 14-17

GSM Timing

Service Kit, 4-5

GSM900, 17-4

H

High Power Attenuator theory, 14-4, 14-13

Hop Controller specs, 12-59 theory, 14-18 troubleshooting, 5-2

Hop controller

Service Kit, 4-5

HP/Agilent 83201A Service Kit, 4-1

HP/Agilent 8922B diagnostics, 2-7 theory, 14-15

HP/Agilent 8922G theory, 14-17

HP/Agilent 8922M Memory Upgrade, 9-

29

HP/Agilent 8922S Memory Upgrade, 9-

29

I

IF Bandwidth theory, 15-9

IF Counter Test theory, 15-10

Input theory, 14-4, 14-13

Input (A,B,E,F,G,H) specs, 12-43

Input (M,S)

Index-3

Index specs, 12-47

Input Section theory, 15-7

Instrument Block Diagrams, 13-2

K

Keyboard troubleshooting, 5-2, 5-6

L line cord, 6-3

Line Fuse, 6-5 line module, 6-5

Line Voltage, 6-5

Loop B Output Detector theory, 15-9

M

Measurement


Memory

Service Kit, 4-5 memory card, 8-2 diagnostics, 2-1

Modulation Distribution


Modulation Distribution External Paths theory, 15-3

Modulation Distribution Internal Paths theory, 15-3

Module I/O Specs, 12-2

MS_DIAGS theory, 15-11

N

NSM theory, 14-10

NSM and Pre-Modulation Filter theory, 15-5

NSM Clock Detector State theory, 15-5

O

Open Loop ALC Drive theory, 15-7

Option 001, 7-4 theory, 14-9

Option 003 theory, 14-17 oscillator, 14-9 oscilloscope theory, 14-18

OUT RF SP theory, 16-2, 16-3

Output


Output Detector, Detector Caps theory, 15-7

Output Detector, Low Level theory, 15-7

Output Filter Rejection theory, 15-8

Output Frequency Range, Loop Closed theory, 15-7

Output Section theory, 15-6

Output Variable Attenuator theory, 15-8

P

Parallel Bus troubleshooting, 5-3

Parallel bus troubleshooting, 5-2 parallel bus theory, 14-18

PCN, 14-2, 17-4

PCS, 17-4

PCS1900, 17-4 performance tests, 3-1 performance verification, 3-1 periodic calibration, 7-2 periodic maintenance, 7-2

Power Supplies specs, 12-53

Power supplies specs, 12-50

Power Supplies and Amplifier Bias theory, 15-6

Power Supply specs, 12-58

Power Switch, 6-6

Power-up, 1-3

Preliminary Audio Paths theory, 15-3

Premod Filter and NSM

Service Kit, 4-5

Premod filter and NSM, 14-9

Premodulation Filter and NSM specs, 12-10

Pre-Modulation Filter Clock Detector

State theory, 15-5

Protocol Interface (Option 003 theory, 14-17

PULSE theory, 16-2, 16-3

Pulse Attenuator theory, 14-13

Pulse Attenuator and Drive theory, 15-7

Pulse Attenuator and Drive Test theory, 15-7

Pulse Driver specs, 12-24

R

Receiver

Service Kit, 4-5 specs, 12-32 theory, 14-6, 15-9

Receiver Mixer specs, 12-19 theory, 14-5

Reference


Replacing a Part, 9-1

RF Analyzer theory, 14-4

RF Analyzer Loop 1 MHz Reference

Detector theory, 15-9

Index-4

Index

RF Analyzer Loop Lock Detector theory, 15-9

RF Analyzer Step Loop theory, 15-8

RF Detectors 1 theory, 15-8

RF Detectors 2 theory, 15-8

RF Generator theory, 14-9

RF Generator Loop 1 MHz Reference

Detector theory, 15-6

RF Generator Loop Lock Detector State theory, 15-6

RF Generator Loop Output Detector theory, 15-6

RF Generator Step Loop theory, 15-6

RF Generator Sum Loop Lock Detector

State theory, 15-6

RF Generator Sum Loop VCO Tuning

Level theory, 15-6

RF In/Out to Aux RF Out Test theory, 15-11

RF Input Signal theory, 15-9

RF Input/Output theory, 15-11

RF_DIAGS theory, 15-5

Running Memory Card Diagnostics, 2-1,

2-3

S

SCOPE theory, 16-2, 16-4 self-tests, 11-2

Sequence Controller theory, 14-16

Serial Bus troubleshooting, 5-2

Serial bus troubleshooting, 5-3 serial bus theory, 14-18

Service Screen, 10-2

Signaling Source/Analyzer


SPEC ANL theory, 16-2, 16-4

Special Option H03, 14-17

Spectrum Analyzer

Service Kit, 4-5 specs, 12-36 theory, 14-4, 14-7, 15-9

Step Attenuator theory, 15-8

Step Loop A


Step Loop A Assembly (A26), 7-5

Step Loop B


Stepped Gain theory, 15-9

Sum Loop theory, 14-12, 15-6

Sum Loop Assembly (A25), 7-5

Summ Loop

Service Kit, 4-5

T

Temperature Sensor theory, 15-8

Temperature Test theory, 15-10 theory of Operation, 14-2

Timebase Adjustments, 7-2

Top and Bottom Cover Removal, 8-3 torque, 8-2

Tracking Filter Rejection theory, 15-7

Transfomer, 6-6

Transformer, 6-6

V

Variable Gain IF Amplifier theory, 15-9 verifying performance, 3-1

Voltmeter theory, 14-18

Index-5

Index

Index-6

No results