HP 8711B, 8713B, 8712B Service Manual

HP/Agilent/Keysight 8711B Manual

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Notice

Hewlett-Packard to Agilent Technologies Transition

This documentation supports a product that previously shipped under the HewlettPackard company brand name. The brand name has now been changed to Agilent Technologies. The two products are functionally identical, only our name has changed. The document still includes references to Hewlett-Packard products, some of which have been transitioned to Agilent Technologies.

Printed in USA March 2000

Contacting Agilent

By internet, phone, or fax, get assistance with all your test and measurement needs.

Table 1-1 Contacting Agilent

Online assistance: www.agilent.com/find/assist United States

(tel) 1 800 452 4844

New Zealand

(tel) 0 800 738 378 (fax) (+64) 4 495 8950

Latin America

(tel) (305) 269 7500 (fax) (305) 269 7599

Japan

(tel) (+81) 426 56 7832 (fax) (+81) 426 56 7840

Canada

(tel) 1 877 894 4414 (fax) (905) 282-6495

Australia

(tel) 1 800 629 485 (fax) (+61) 3 9210 5947

Asia Call Center Numbers

Country Phone Number Fax Number

Singapore 1-800-375-8100 (65) 836-0252 Malaysia 1-800-828-848 1-800-801664 Philippines (632) 8426802

1-800-16510170 (PLDT Subscriber Only)

Thailand (088) 226-008 (outside Bangkok)

(662) 661-3999 (within Bangkok) Hong Kong 800-930-871 (852) 2506 9233 Taiwan 0800-047-866 (886) 2 25456723 People’s Republic

of China

800-810-0189 (preferred)

10800-650-0021

(632) 8426809 1-800-16510288 (PLDT Subscriber Only)

(66) 1-661-3714

10800-650-0121

Europe

(tel) (+31) 20 547 2323 (fax) (+31)20 547 2390

India 1-600-11-2929 000-800-650-1101

Service Guide

HP

8711B/12B/13B/14B

RF

Network

Analyzers

ABCDE

HP Part No. 08713-90005

Printed in USA February 1995

Notice.

The

information contained

in

this

document

is

subject

to

change

without

notice

.

Hewlett-P

ackard makes

no

warranty

of

any

kind

with

regard

to

this

material,

including

but

not limited

to,

the

implied

warranties

of

merchantability

and

tness

for

a

particular

purpose

.

Hewlett-P

ackard

shall

not

be

liable

for

errors

contained

herein

or

for

incidental or

consequential

damages

in

connection

with

the

furnishing,

performance

,

or

use

of

this

material.

c



Copyright Hewlett-Packard Company 1995

is prohibited, except as allowed under the copyright laws.

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

Certication

Hewlett-P

ackard

Company

certies

that this

product met

its published

specications at

the

time

of

shipment

from

the

factory

. Hewlett-P

ackard further

certies that

its calibration

measurements

are

traceable

to

the

United

States National

Institute of

Standards and

T

echnology

,

to

the

extent

allowed by

the Institute's

calibration facility

,and

to the

calibration

facilities

of

other

International

Standards Organization

members.

Regulatory

Information

The

regulatory

information

is

in

the

User's

Guide

supplied

with

the

analyzer

.

How

to

Use

This

Guide

This guide

uses

the

following

conventions:

4

F

ront-P

anel Key

5

This

represents

a

key

physically

located

on

the

instrument.

NN

N

NN

Softkey

This

indicates

a

\softkey

,"

a

key

whose

label

is

determined

by

the

instrument's

rmware

.

Screen

Text

This

indicates

text

displayed

on

the

instrument's

screen.

iii

Contents

1.

P

erformance

T

ests

System

Specications

Summary

.

..

.

1-1

Measurement P

ort

Specications

.

..

. 1-2

Source Specications

.

..

.

1-2

Receiver Specications

.

..

.

1-3

Performing

the

Operator's

Check

.

..

.

1-5

Make

a

Transmission

Measurement

.

..

.

1-6

Make

a

Reection

Measurement

.

..

.

1-7

If

the

Analyzer

F

ails

the

Operator's

Check

.

..

.

1-9

Instructions

for

Using

the

Network

Analyzer

P

erformance

T

est

Software

.

1-10

Introduction .

..

.

..

.

1-10

Equipment

.

..

.

1-10

File

Structure

.

..

.

1-12

Conguration

File

.

..

.

1-13

Getting

Started

.

..

.

1-13

P

erformance

T

est

Software

Installation

.

..

.

1-14

The

analyzer's

HP-IB

address

(716)

.

..

.

1-14

The

ISC

for

the

test

equipment

(7)

.

..

.

1-14

The

power

meter

model

number

(HP

437B)

and

address

(13)

.

..

.

1-14

The

spectrum

analyzer

(HP

8566B)

and

address

(18)

.

..

.

1-14

The

function

generator

model

number

(HP

8116A)

and

address

(14)

.

1-14

The

attenuator

switch

driver

model

number

(HP

11713A)

and

address

(28)

1-15

The

frequency

counter

model

number

(HP

5342A)

and address

(02) .

.

1-15

The

voltmeter

model

number

(HP

3456A)

and

address (22)

..

.

1-15

The

printer

address

(01)

.

..

.

1-15

The

program

directory

and

the

mass

storage

unit specier

(the current

MSI

device)

.

..

.

1-15

The

data directory

and MSUS

..

.

..

. 1-15

The

sensor's,

10 dB

step attenuator's

,

and

xed

attenuator's

(pad's)

serial

numbers

(xxxx) .

..

.

..

1-15

The

40

dB

step

attenuator

card

selection

(3)

.

..

.

..

1-15

The beeper (on)

...........

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

1-15

The current DUT le sux (1)

........

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

1-15

Sensors .......................

...... ...

1-16

20 dB Attenuators (P

ads) . . . . . . . . . . . . . . . . . . . .

....

1-16

Step

Attenuator . . . . . . . . . . . . . . . . . . . . . . . .

....

1-16

Using

theProgram.......................

..... .

1-17

Main Menu

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

......

1-17

Test Selection Menu

...... ..

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

1-18

Miscellaneous Information ... ....... ...... ...... .. 1-19

Individual Test Notes And Descriptions ................... 1-19

Frequency Accuracy........................... 1-19

Gain Compression ...... ........ ...... ..... ... 1-19

Noise Floor ............................... 1-20

Dynamic Accuracy............................ 1-20

Power Flatness ............................. 1-20

Contents-1

Absolute

Accuracy

..

.

..

. 1-21

Broadband

Frequency Response

.

..

1-21

Directivity

(includes source

match

and

test

port

match)

.

..

1-22

Spurs

(including harmonics)

.

..

1-23

AM

Delay Modulator

(Option

1D

A/1DB

analyzers

only)

.

..

. 1-23

2.

A

djustments

Correction

Constants

(CCs)

A

djustments

.

..

.

2-2

Fractional-N

V

CO

A

djustment

.

..

.

2-3

Required

Equipment

.

..

.

2-3

Estimated

A

djustment

Time

.

..

.

2-3

Procedure

.

..

.

2-3

Fractional-N

Spur

A

djustment

.

..

.

2-6

Required

Equipment

.

..

.

2-6

Estimated

A

djustment

Time

.

..

.

2-6

Procedure

.

..

.

2-6

Frequency

A

ccuracy

A

djustment

.

..

.

2-10

Required

Equipment

.

..

.

2-10

Estimated

A

djustment

Time

.

..

.

2-10

Procedure

.

2-10

Set

Serial

Number

,

A

djustment

#100

.

..

.

2-12

Required

Equipment

.

..

.

2-12

Estimated

A

djustment

Time

.

..

.

2-12

Procedure

.

..

.

..

2-12

In

Case

of

Diculty

.

..

.

. 2-13

LO

P

ower

Correction,

A

djustment

#101

..

.

2-14

Required

Equipment

.

..

.

2-14

Estimated A

djustment

Time

.

..

2-14

Procedure

..

.

..

.

2-14

Switched

Gain Correction,

A

djustment

#102

.

2-15

Required

Equipment .

..

.

..

2-15

Estimated

Adjustment

Time .

.

. 2-15

Procedure

.

..

.

2-15

External

Detector

Correction,

A

djustment

#103

.

..

2-16

Required

Equipment

.

..

.

2-16

Estimated

A

djustment

Time

.

..

.

2-17

Procedure

.

..

.

2-17

A

uxiliary

Input

Correction,

A

djustment

#111

.

..

2-18

Required

Equipment

.

..

.

2-18

Estimated

A

djustment

Time

.

..

.

..

.

2-18

Procedure . . . . . . . . .

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

2-18

Source P

ower (ALC) Correction, A

djustment #104

...

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

2-19

Required Equipment . . . . . . . . . .

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

2-19

Estimated A

djustment Time ..................

.....

2-19

Procedure . . . . . . . . . . . . . . . . . . . . .

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

2-20

In Case of Diculty

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

...... ..

2-20

B Amplitude Correction, A

djustment #105 . . . . . . . . . . . . . . . . . .

. 2-22

Required Equipment . . . . . . . . . . . . . . . . . . . . . . .

.....

2-22

Estimated Adjustment Time ....................... 2-22

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22

Transmission (B/R) Correction, Adjustment #106 . . . . . . . . . . . . . . . . 2-23

Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23

Estimated Adjustment Time ....................... 2-23

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23

AM Delay Correction, Adjustment #112 . . . . . . . . . . . . . . . . . . . . 2-24

Contents-2

Required

Equipment .

..

.

..

2-24

Estimated

Adjustment

Time

.

..

. 2-24

Procedure

..

.

..

.

2-24

Reection

(One-Port)

Correction,

A

djustment

#107

.

..

2-25

Required

Equipment .

.

..

.

2-25

Estimated

Adjustment

Time

.

..

. 2-25

Procedure

.

..

.

2-25

R*

Amplitude

Correction,

A

djustment

#108

.

..

.

2-26

Required

Equipment

.

..

.

2-26

Estimated

A

djustment

Time

.

..

.

2-26

Procedure

.

..

.

2-26

R*

Frequency

Response

Correction,

A

djustment

#109

.

..

.

2-27

Required

Equipment

.

..

.

2-27

Estimated

A

djustment

Time

.

..

.

2-27

Procedure

.

..

.

2-27

B*

Amplitude

Correction,

A

djustment

#110

.

..

.

2-28

Running

the

B*

Amplitude

Correction

Using

the

P

erformance

T

est

Software

(08712-10011)

.

..

.

2-28

Required

Equipment

.

..

.

2-28

Estimated

A

djustment

Time

.

2-29

Procedure

.

..

.

2-29

Running

B*

Amplitude

Correction

A

djustment

#110

from

IB

ASIC

.

..

2-31

Required

Equipment

.

..

.

2-31

Estimated

A

djustment

Time

.

..

.

2-31

Procedure

.

..

.

..

2-32

3.

Assembly

Replacement

Introduction .

.

..

.

3-1

Required

Tools

.

..

.

3-1

Major

Assembly Removal/Replacement

.

3-1

A1

Front P

anel Assembly

Replacement

.

3-2

How

to Remove

the Front

P

anel

Assembly

.

3-2

A2

CPU

Board

Assembly

Replacement

.

..

.

3-4

How

to

Remove

the

CPU

Board

Assembly

.

..

3-4

A3

Fractional-N/Reference

Assembly

Replacement

.

. 3-7

How

to

Remove

the

Fractional-N/Reference

Assembly

.

3-7

A4

Source

Assembly

Replacement

.

..

3-8

How

to

Remove

the

Source

Assembly

.

..

. 3-8

A5

Receiver

Assembly

Replacement

.

..

.

3-9

How

to

Remove

the

Receiver

Assembly

.

..

.

..

.

3-10

A6 P

ower Supply Assembly Replacement

....

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

3-11

How to Remove the P

ower Supply Assembly

...

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

3-11

A7 Display Assembly Replacement

........

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

3-12

How to Remove the Display Assembly

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

..

3-12

A8 3.5" Internal Disk Drive Assembly Replacement

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

3-13

How to Remove the 3.5" Disk Drive Assembly . . . . . . . . . . . . . . .

3-13

Attenuator Replacement . . . . . . . . . . . . . . . . . . . . . .

.....

3-13

AM Delay Modulator Replacement

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

. 3-13

Post Repair Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

How to Order Parts . ........ ..... ...... ...... ... 3-15

Save Money by Ordering R-E (Rebuilt-Exchange) Assemblies .... ..... 3-15

Save Time by Calling (800) 227-8164 .......... ..... ..... 3-15

Contents-3

4.

Troubleshooting and

Block Diagrams

General

Notes .

.

..

.

4-1

Service

Kit .

.

..

.

4-2

How

to Use

the

Extender

Board

.

..

. 4-3

Initial

Observations -

Normal

P

ower-up

Sequence

.

..

. 4-4

Operator's

Check .

.

..

.

4-4

Category

1

F

ailures

-

Dead

or

No

Response

,

No

Display

,

Unreadable

Display,

or

Error

Messages

on

the

Display

.

..

.

4-5

Troubleshooting

A6

P

ower

Supply

Assembly

Problems

.

..

. 4-5

Check

the

Rear

P

anel

LEDs

.

..

.

4-5

Measure

the

P

ower

Supply

V

oltages

.

..

.

4-6

Remove

Assemblies

.

..

.

4-6

Troubleshooting

Digital

Group

Problems

.

..

.

4-7

Error

During

P

ower-up

.

..

.

4-7

T

est

Status

LEDs

.

..

.

4-9

T

est

Status

LEDs

code

.

..

.

4-9

Error

Occurs

During

DSP

Initialization

or

Calculating

Coecients

.

..

. 4-12

Clear

the

Nonvolatile

SRAM

.

..

.

4-12

Measure

the

5

MHz

Reference

Signal

.

..

.

4-12

Front

P

anel

Problems

.

4-13

Other

P

ower-Up

Problems

.

..

.

4-13

Other

Error

messages

.

..

.

4-13

Category

2

F

ailures

-

No Error

Message,

but

Nonfunctional

Measurement

.

4-14

Troubleshooting

the

A3

Fractional-N/Reference

Assembly

..

.

4-14

Check

the

Output

P

ower

..

.

4-14

Phase

Lock

Problems

.

..

.

4-14

Detailed

Fractional-N/Reference

Troubleshooting

.

..

.

4-15

Troubleshooting the

A4

Source

Assembly

.

4-16

Troubleshooting

the A5

Receiver

Assembly

.

4-16

A5

Receiver Assembly

Diode

Replacement

.

4-17

Trace

at

6

200 dB

.

..

.

4-20

Detailed

Receiver Troubleshooting

..

.

4-20

Category

3F

ailures -

Inaccurate

(but

reasonably

functional)

Measurements

.

4-21

Troubleshooting

Spurious

Responses

and

Inaccurate

Data

.

4-21

Spurious

Signals

.

..

.

4-21

Spurs

in

the

Data

Trace

.

..

.

4-22

Inaccurate

Data

.

..

.

4-22

Receiver

P

ower

Problems

.

..

.

4-23

Category

4

F

ailures:

P

eripheral

Device

Problems

..

.

4-24

DIN

Keyboard

.

..

.

..

.

. 4-24

RS-232 Printers and Plotters

......

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

4-24

Centronics

R



(Parallel) Printers and Plotters . . . . . .

..........

4-24

HP-IB Systems . . . . . . . . . .

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

4-25

HP-IB Problems with Printers or Plotters

.......

...... ....

4-25

HP-IB Problems with Disk Drives . . . . . . . . . . . . . . . . .

....

4-25

General Checks for HP-IB Systems

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

..

4-25

Contents-4

5.

Service Related

Menus

Introduction

..

.

..

.

5-1

T

ests and

A

djustments

Menu

.

..

.

5-3

Select

Self-Test

Menu

.

..

.

5-3

Select

Adjustment

Menu

.

..

.

5-5

Instrument

Info .

.

..

.

5-7

Update

Corr

Const

Menu

.

..

.

5-7

Service

Utilities

Menu

.

..

.

5-8

Meas

Cal

Options

Menu

.

..

.

5-10

Analog

Bus

Menu

.

..

.

5-10

More

SV

C

Utilities

Menu

.

..

.

5-12

View

Array

Master

Menu/View

Array

Interpol

Menu

.

..

.

5-12

Miscellaneous

Service

Functions

.

..

.

5-13

Clearing

Nonvolatile

Memory

(SRAM)

.

..

.

5-13

HP-IB

Command

Reference

for

Service

.

..

.

5-13

Syntax

Summary

.

..

.

5-13

Softkey

SCPI

Commands

.

..

.

5-14

Alphabetical

SCPI

Command

Summary

.

..

.

5-15

6.

Theory

of

Operation

Introduction

.

..

.

6-1

System

Theory

.

..

.

6-1

Analyzer

Functional

Group

.

..

.

6-2

P

ower

Supply

Theory

.

..

.

. 6-2

Digital

Control

Theory

.

..

.

6-2

A1

Front

P

anel

Assembly

.

..

.

6-2

A2

CPU

Assembly

.

..

.

6-2

A7 Display

Assembly

.

..

.

6-3

A8

3.5" Internal

Disk

Drive

Assembly

.

6-3

Source

Theory .

.

..

.

6-4

A3

Fractional-N/Reference Assembly

..

.

6-4

A4

Source Assembly

..

.

..

6-4

Receiver

Theory

.

..

.

6-6

Dierences

Between

the

HP

8711B/12B

and

HP

8713B/14B

(1300

MHz

vs

3000

MHz)

.

..

.

6-7

HP

8713B/14B

A4

Source

Assembly

.

..

.

6-7

A5

Receiver

Assembly

.

..

.

6-8

7.

P

arts

List

Analyzer

Hardware

.

..

.

..

.

7-1

Specic Assembly and Cable Locations

.....

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

7-1

8. Correction Constants and Firmware

Storing and Recalling Correction Constants (CC) . . . . . . . . . . . . . . . .

8-1

ToP

ermanently Store CCs in the Analyzer . . . . . . . . . . . . .

.....

8-2

To Store CCs to Disk for Archive

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

.......

8-2

To Recall CCs from Disk

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

...... ..

8-2

To Recall Previous CCs from a Disk after Replacing the A2 CPU Board

....

8-2

To Replace Suspected Incorrect CCs . . . . . . . . . . . . . . . . . . . . . 8-2

If

ROM Appears to be Blank

Message is Displayed at Power-up . . . . . . . 8-2

If

Warning: No Correction Constants Installed

Is Displayed at Power-up 8-2

Step 1. Storing Correction Constants to Disk .... ...... ...... 8-3

Step 2. Updating or Restoring Firmware .................. 8-4

Step 3. Installing Correction Constants from Disk .............. 8-4

Step 4. Loading Correction Constants from Disk . . . . . . . . . . . . . . . 8-4

Contents-5

Upgrading

Firmware .

..

.

..

. 8-4

Making

a Current

Correction

Constants

Disk

(Optional)

.

..

. 8-5

How

to Upgrade

the

Firmware

.

..

8-5

9.

Previous Serial

Numbers

10.

Safety

,

W

arranty

,

and

Assistance

Safety

Symbols

.

..

.

10-1

General

Safety

Considerations

.

..

.

10-2

Safety

Earth

Ground

.

..

.

10-2

Servicing

.

..

.

10-2

W

arranty

.

..

.

10-3

Limitation

of

W

arranty

.

..

.

10-3

Exclusive

Remedies

.

..

.

10-3

Assistance

.

..

.

10-4

Shipment

for

Service

.

..

.

10-4

Index

Contents-6

Figures

1-1. Equipment

Setup

for

Transmission

Measurement

.

1-6

1-2. Typical

HP

8713B/14B

Transmission

Measurement

.

1-6

1-3. Typical

HP

8713B/14B

Reection

Measurement

.

1-7

1-4. Connect

the Load

.

..

.

1-7

2-1. Removing

the Handles

and

Front

P

anel

.

..

2-4

2-2.

TP11

and

L162

for

Fractional-N

V

CO

A

djustment

.

..

. 2-5

2-3.

Removing

the

Handles

and

Front

P

anel

.

..

.

2-7

2-4.

Setup

for

Fractional-N

Spur

A

djustments

.

..

2-8

2-5.

API

and

100

kHz

A

djustments

.

..

.

2-9

2-6. Setup

for

Frequency

A

ccuracy

A

djustment

.

2-10

2-7.

Removing

the

Handles

and

Front

P

anel

.

2-11

2-8. External

Detector

Connector

,

Front

View

.

..

2-16

2-9. Setup

for Source

P

ower

Correction

.

..

. 2-20

2-10. Setup

for

B*

Amplitude

Correction

for

50

Analyzers

.

2-29

2-11. Setup

for

B*

Amplitude

Correction

for

75

Analyzers

.

2-29

3-1. Removing

the

Handles

and

Front

P

anel

Assembly

.

3-2

3-2.

Removing

the

CPU

Assembly

.

..

.

3-4

3-3.

BootROM

U82,

Component

Location

.

..

.

3-5

3-4.

Removing

the

Fractional-N/Reference

Assembly

.

..

3-7

3-5.

Removing

the

A4

Source

Assembly

.

..

.

3-8

3-6.

Anchoring

Screw

Locations

for

A5

Receiver

Removal

.

. 3-10

3-7.

A8

Disk

Drive

Jumper

Conguration

.

..

.

3-13

4-1.

Example

of

an

Antistatic

W

orkstation

.

..

.

4-2

4-2.

Connecting

the

Extender

Board

.

..

.

4-3

4-3.

P

ower

Supply

Connector

,

as

Viewed

from

Rear P

anel .

..

.

4-6

4-4.

HP

8711B/12B

Reection

Measurement

with

Through

Cable

.

..

4-16

4-5.

HP

8713B/14B

Reection Measurement

with Through

Cable .

.

4-17

4-6.

HP

8711B/12B

A5CR1, CR2,

CR36, and

CR37 Component

Locations .

.

4-18

4-7.

HP

8713B/14B

A5CR45, CR46,

CR47, CR48,

CR53, and

CR54 Component

Locations

..

.

..

4-19

4-8. HP

8711B/12B

Overall

Block

Diagram

.

..

.

. 4-27

4-9. HP 8713B/14B A4 Source and A5 Receiver Assemblies Block Diagram . . . . .

4-29

5-1. The Service Key Menus

.

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

5-2

6-1. Simplied Analyzer System Block Diagram

.

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

6-1

6-2. Simplied HP 8711B/12B A4 Source Block Diagram

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

6-5

6-3. Simplied Receiver Block Diagram

...

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

6-6

8-1. Correction Constants Flow by Keystroke and Cycling P

ower .........

8-1

Contents-7

T

ables

1-1. Required

Equipment for

the

A

djustments

and

P

erformance

T

ests

.

1-11

3-1.

P

ost

Repair

Procedures

.

..

.

3-14

4-1.

HP

8711B/12B/13B/14B

Self-T

ests

.

..

.

4-9

4-2. Source

Frequency

V

ersus

Fractional-N

Frequency

.

..

4-15

5-1. HP

8711B/HP

8712B/HP

8713B/HP

8714B

Self-T

ests

.

..

5-4

5-2. HP

8711B/12B/13B/14B

Network

Analyzer

A

djustments

.

5-6

5-3. HP

8711B/12B/13B/14B

Correction

Constant

Storage

Arrays

.

5-9

5-4.

Analog

Bus

Nodes

.

..

.

5-11

5-5.

Softkey

SCPI

Commands

.

..

.

5-14

5-6.

Alphabetical

SCPI

Command

Summary

.

. 5-15

7-1.

HP

8711B/12B

Major

Assembly

and

Cable

Locations

.

7-2

7-2. HP

8713B/14B Major

Assembly and

Cable

Locations

.

7-3

7-3.

A1

Front

P

anel

Assembly

and

Cable

Locations

.

..

7-4

7-4.

A2

CPU

Assembly

and

Cable

Locations

.

..

.

7-5

7-5.

A3

Fractional-N/Reference

Assembly

and

Cable

Locations

.

7-6

7-6.

HP

8711B/12B

A4

Source

Assembly

and

Cable

Locations

.

. 7-7

7-7.

HP

8713B/14B

A4

Source

Assembly

and

Cable

Locations

.

7-8

7-8.

HP

8711B/12B

A5

Receiver

Assembly

and

Cable

Locations

.

..

.

7-9

7-9.

HP

8711B/12B

A5

Receiver

Optional

Congurations

Assembly

and

Cable

Locations

.

..

.

7-10

7-10.

HP

8713B/14B

A5

Receiver

Assembly

and

Cable

Locations

.

..

.

7-11

7-11.

HP

8713B/14B

A5

Receiver

Optional

Congurations

Assembly

and

Cable

Locations

.

..

.

7-12

7-12.

A6

P

ower

Supply

Assembly

and

Cable Locations

..

.

7-13

7-13.

A7

Display

Assembly

and

Cable Locations

..

.

7-14

7-14.

Cabinet

and

Miscellaneous

P

arts .

..

.

7-15

8-1.

Storing

and

Recalling

Correction

Constants

Quick

Reference .

..

.

8-3

10-1.

Hewlett-P

ackard

Sales

and

Service

Oces

..

.

10-5

Contents-8

1

P

erformance T

ests

This chapter

is divided

into

three

parts:

the

system

specications

summary

,

performing the

operator's

check,

and

instructions for

using

the

network

analyzer

performance

test

software

.

The operator's

check

can

be

used

as

a

quick

80%

condence

test.

The

only

equipment

required

for

this

check

is

a

type-N

cable

and

a

good

quality

50

type-N

load

(75

for option

1EC).

The

performance

tests

will

verify

that

the

analyzer

meets

its

published

specication

with

greater

than

a

95%

condence

level.

The

performance

tests

are

completely

automated.

The

performance test

software is

written for

an

HP

9000

Series

200

or

300

computer

(or

equivalent)

using HP

BASIC.

There are

no

manual

tests

provided,

nor

are

any

test

record

cards

provided.

Note

If

you

would

like to

order the

network

analyzer

performance

test

software

(HP

part

number

08712-10011), contact

your nearest

Hewlett-P

ackard

sales

and

service

oce

.

Results

of

the

automated

performance

tests

can

be

printed

out

at

any

time

.

They

include

all

specications

,

limits

,

and

uncertainties

.

Although

no

manual

test

is

provided,

each

test

is

described

in

enough

detail

below

to

allow

a

knowledgeable

technician

to

perform all

needed

tests

in

an

accurate

manner

.

System

Specications

Summary

The

specications and

characteristics in

this

section

describe

the

system

performance

of

the

analyzer

.

This

section is

asummary

of the

full System

Specications.

F

or

a

complete

listing

of

the

analyzer's

specications

,

see

\Specications

and

Characteristics"

in

the

User's Guide

.

Specications

(indicated by boldface type) describe the analyzer's warranted performance

over the temperature range of 25C65



C, unless otherwise stated.

Supplemental characteristics

(indicated by italics) are typical, but nonwarranted parameters

,

intended

to provide information useful in applying the analyzer

.

Performance Tests 1-1

Measurement

P

ort

Specications

The

following

specications

describe

the

residual

system

uncertainties

.

These

specications

apply

after

a

user

calibration

has

been

performed

and within

an environmental

temperature

range

of

25



C

6

5



C,

with

less

than

1



C

deviation

from

the

calibration

temperature

.

Directivity:

40

dB

Source

match

(reection):

20

dB

Source

match

(transmission):

14

dB

(HP

8711B/12B)

,

20 dB

(HP 8713B/14B)

Load

match:

18

dB

Source

Specications

Frequency

Range

HP

8711B/12B

300

kHz

to

1300

MHz

HP

8713B/14B

300

kHz

to

3000

MHz

A

ccuracy

6

5

ppm

at

25



C

6

5



C

<

1Hz

at 10%

change

in

line

voltage

Output P

ower

Level

A

ccuracy

1

6

1.0

dB

6

1.5

dB

(Option

1EC,

75)

6

2.0

dB

(Option

1E1,

Attenuator)

6

3.0

dB

(Options

1EC

and

1E1)

1

All

power

characteristics

for

HP

8713B/14B

analyzers with

option 1EC

(75 ports)

are

typical

above

2000

MHz.

Maximum

Test

Port

Power

Frequency HP

8711B/12B

(Std)

HP

8713B/14B

(Std)



1000

MHz

+16

dBm

1

+10

dBm

1

>

1000 MHz +13 dBm

1

+10 dBm

1

Subtract from the above maximum

levels the sum of: 3 dB for 75 (Option 1EC), 1 dB for attenuator (Option

1E1), 2 dB for AM delay (HP 8711B/12B Option 1D

A/1DB), and

4 dB for AM delay (HP 8713B/14B Option

1DA/1DB)

Source Harmonics

Frequency HP 8711B/12B HP 8713B/14B

<

1 MHz

<020 dBc

<030 dBc



1 MHz

<030 dBc

1-2 Performance Tests

Signal

Purity

Parameter HP 8711B/12B HP 8713B/14B

Nonharmonic

Spurious



50

kHz

from

carrier

<

1

MHz

<

0

20

dBc

<

0

30

dBc



1

MHz

<

0

30

dBc

<

0

30

dBc

<

50

kHz

from

carrier

<

0

25

dBc

<

0

25

dBc

Receiver Specications

Frequency Range

Type

of

Detection

HP

8711B/12B

HP

8713B/14B

narrowband 0.3

to

1300

MHz

0.3

to

3000

MHz

broadband 10

to

1300

MHz

10

to

3000

MHz

Typical

Frequency Response

(broadband)

HP

8711B/12B

HP

8713B/14B

6

0.5

dB

6

1.0

dB

T

otal

P

ower

A

ccuracy

(broadband)

T

otal P

ower

A

ccuracy

=

Absolute

P

ower

A

ccuracy

+

Frequency

R

esponse

Dynamic

Range

(Narrowband)

Frequency HP

8711B/12B

(50)

HP

8711B/12B

(75)

HP

8713B/14B

(50)

HP

8713B/14B

(75)

<

5

MHz

>

60

dB

>

57

dB

>

100

dB

>

97

dB



5

MHz

>

100

dB

>

97

dB

>

100

dB

>

97

dB

Maximum Input

Type of Detection HP 8711B/12B HP 8713B/14B

narrowband

1

+10 dBm +10 dBm

broadband

2

+16 dBm +16 dBm

160.5 dB compression

2

at 0.55 dB compression

Performance Tests 1-3

Absolute

Power

Accuracy

(broadband)

Dynamic

A

ccuracy

(narrowband)

1-4 Performance Tests

Performing

the Operator's

Check

The

operator's

check

should

be performed

when you

receive your

analyzer,

and any

time you

wish

to

be

condent

that

the

analyzer is

working properly

. The

operator's check

does not

verify

that

the

analyzer

is

performing

to specications

. Its

purpose is

to provide

you with

a

high

degree

of

condence

that

the

analyzer is

performing properly

if it

passes.

The operator's

check

consists

of

making

a transmission

measurement with

the cable

that was

supplied

with

your

analyzer

,

a

reection

measurement

with the

same cable

,and

a

measurement

with

a

50

(or

75)

termination.

Use

a

known-good

load, such

as one

from calibration

kit

HP

85032B/E

(50)

or

HP

85036B/E

(75).

Performance Tests 1-5

Make

a

Transmission

Measurement

1.

Connect the

equipment as

shown in

Figure 1-1

.Use

a known

good cable

such

as

the

one

that

was

supplied

with your

analyzer.

Figure

1-1.

Equipment

Setup

for

Transmission

Measurement

2.

Press

4

PRESET

5

4

SCALE

5

4

.1

5

NN

N

Enter

.

3.

Verify

that the

data

trace

falls

within

6

0.5

dB

of

0

dB

.

See

Figure

1-2

for

a

typical

HP

8713B/14B result.

The HP

8711B/12B

should

look

similar

,

but

end

at

1300

MHz.

Figure 1-2.

Typical HP 8713B/14B Transmission Measurement

1-6 Performance Tests

Make

a

Reection

Measurement

1.

Leave the

cable connected

to the

analyzer.

2.

Press

4

CHAN

1

5

N

NN

N

Reflection

4

SCALE

5

4

10

5

N

NN

N

Enter

.

3. V

erify that

the data

trace falls

completely below

0

16

dB

.

See

Figure

1-3

for

a

typical

HP 8713B/14B

trace.

Figure

1-3.

Typical

HP

8713B/14B

Reection

Measurement

Figure 1-4. Connect the Load

Performance Tests 1-7

4. Disconnect

the cable

and connect

aknown

good load

to

the

RF

OUT

port

as

shown

in

Figure 1-4

.

5. V

erify that

the data

trace

falls

below

0

30

dB

.

If

the

data

trace

is o

the screen,

press

4

SCALE

5

NN

N

NN

N

NN

N

Reference

Level

and

the

4

+

5

key

until

the

trace

moves

up

onto

the

screen.

This concludes

the Operator's

Check. However

, further

condence can

be obtained

by

performing the

following:

Measure the

175 MHz

lter supplied

with

the

analyzer

to

verify

that

its

measured

response

is

the same

as is

expected. V

erify

both

the

frequency

accuracy

and

noise

oor

.

Check broadband

response with

lter using

conversion-loss

mode

(same

as

B*/R*).

If the

analyzer's frequency

accuracy

is

critical

for

your

application,

verify

a

CW

frequency

using a

frequency counter

.

V

erify

to

6

.005%

accuracy

(for

example

,

6

2500

Hz

at

500

MHz).

Ensure

that

the

analyzer is

placed in

trigger-hold mode

(press SOURCE

4

MENU

5

N

NN

N

Trigger

N

NN

N

Hold

)

to measure

frequencies.

1-8 Performance Tests

If

the

Analyzer

F

ails

the

Operator's

Check

If

your

analyzer

does

not

meet

the

criteria

in

the

operator's check,

your analyzer

may

need

servicing.

Have

a

qualied

service

technician

check

the analyzer

or contact

any

Hewlett-P

ackard

sales

or

service

oce

for

assistance

. Refer

to T

able 10-1,

\Hewlett-Packard

Sales

and

Service

Oces"

in

\Safety

,

W

arranty,

and Assistance"

for the

nearest oce

.

Performance Tests 1-9

Instructions for

Using the

Network Analyzer

Performance

Test

Software

Introduction

The

performance test

software (HP

part number

08712-10011)

is

designed

to

automate

all

the

performance verication

tests

for

the

HP

8711B

,

HP

8712B

,

HP

8713B

,

and

HP

8714B

as

well as

the

two

required

automated

adjustments

(fractional-N

spur

adjustment

and

B*

amplitude

correction adjustment).

It

will

test

all

option

combinations

,

including

both

50

and

75

versions.

An

HP

9000

Series

200

or

300

(or

equivalent)

computer

with

B

ASIC

5.1

or

greater

is

required to

run the

software

.

However

,

it

will

also

run

on

a

PC

system

with

an

HP

B

ASIC

language

processor

card

(HP

82324B

or

equivalent).

Note

This

program

cannot

be

used

to

test

an

HP

8711A.

T

o

test

an

HP 8711A,

order

HP

part

number

08711-10011.

The

performance

test software

is

provided

on

a

single

disk.

Y

ou

can

run

the

program

directly

from the

disk, although

it is

recommended

that

you

run

it

from

your

system's

hard

disk

for

best performance

. Generally

, the

program

can

be

stopped,

reset

and

re-run

with

little

or

no

loss

of data.

The program

will operate

on a

LIF-based

system,

an

SRM/HFS

environment,

or

a

DOS

environment.

Operation

is

a simple

menu driven

system

with

some

softkey

selections

.

F

or

ease

of

use

,

the

4

RETURN

5

/

4

ENTER

5

/

4

EXECUTE

5

key

can

always

be

used

as

softkey

#1:

the

most

frequently

used

key

.

Note

All

necessary

instructions

and

test

setup

diagrams

are

contained

within

the

program.

A

disk

le

is

generated

for

each

analyzer

,

and the

results of

each

test

are

stored

in

that

le

.

This

le

is

updated

after

each

test

so that

results will

not be

accidentally lost.

A

printout

can

be

obtained

for

any

previously

tested

analyzer

.

T

est times

are kept

to a

minimum,

allowing

analyzers

to

be

fully

tested

within

one

hour

.

Equipment

Besides

a computer

, printer

,RF

cables,

BNC cables

, HP-IB

cables

,

and

adapters

,

T

able

1-1

lists

the

equipment

that

is

required

to

test

and

adjust

the

analyzer

.

1-10 Performance Tests

T

able 1-1.

Required

Equipment for

the

A

djustments

and

P

erformance

T

ests

Description HP

Model

#

50

STD

75

Opt

1EC

Notes

ADJ

PERF

ADJ

PERF

Function

generator

HP

8116A

X

No

substitute

Power

meter

HP 437B

,

HP

438A

X X X X Do

not

use

an

HP

436A.

P

ower

sensor

,

50

HP

8482A

X

P

ower

sensor

,

75

HP

8483A

-

X

Low

power

sensor

HP

8481D

X

-

X

-

F

or

option

1E1

(atten)

units

only

Cal

kit

type-N

50

HP

85032B

Option

001

1

X

-

Cal

kit

type-N

75

HP

85036B

-

X

10

dB

step

attenuator

HP

8496A/G

X

Attenuator/switch

driver

HP

11713A

X

Needed

for

\G"

version

step

attenuators

only

Spectrum

analyzer

HP

8560

series

,

HP

8566B

X

Others

may

be

substituted,

optional

for

adjustments

30

MHz

bandpass

lter

9135-0475 -

-

May

not

be

required

2

20

dB attenuator

50

HP

8491A/B/C Opt

020

X

-

Required

for adjustments

only if

analyzer

does

not

have

option

1E1

installed.

20

dB

attenuator

75

3

0955-0758 -

-

X

See

note

for

50

20

dB

attenuator

above

.

10

dB

attenuator

50

HP

8491A/B/C

Opt

010

X

-

May

not

be

required

for

HP

8713B/14B

6

dB

attenuator

50

HP

8491A/B/C

Opt

006

X

-

3

dB

attenuator

50

HP

8491A/B/C

Opt

003

-

X

-

3

dB

attenuator

75

0955-0765 -

-

X

P

ower

splitter

,50

0955-0751,

11667A

-

X

-

P

ower splitter

,75

0955-0752 -

-

X

Minimum

loss

pad

(2)

HP

11852B

-

X

One

for

adjustments

,

two for

performance tests

.

Frequency counter HP 5342/3A,

5350B

- - - - May not

be

required.

4

Precision cable 50 8120-4781 X X X X

Precision cable 75 8120-2408 - - X -

Service kit 08712-60012 X - X -

1

An HP 85032B Option 001 is a subset of the standard HP 85032B

. This eliminates two 7-mm adapters that are

not

needed, resulting in a

signicant cost savings

.

2

The 30 MHz bandpass lter is used to eliminate harmonics from the external source

. Its use

is

not required

unless

harmonics are worse than

0

30 dBc

.

3

The 75 20 dB attenuator can be substituted with two minimum loss pads and a 50 10 dB attenuator. NOTE: a set

of 75 attenuators (3,6,10,20 dB) is available as HP 86213A.

4

The frequency counter is useful when very accurate frequency measurements are needed. However, if you are

using a synthesized spectrum analyzer, the frequency can be measured by using the analyzer (thus eliminating

another piece of equipment). Note that the frequency measurement using a spectrum analyzer will not be quite as

accurate as a frequency counter, but it is sucient in most cases.

Performance Tests 1-11

File

Structure

The

program

disk

contains

several

dierent

les

in

addition

to

the main

program le

.The

following

list

describes

the

les

found

on

the

performance test

software disk.

CAL871XB

This

is

the

main

program

le

.

Cfg xxxx

This

is

the

conguration

le

.

The

variable

xxxx

represents any

user-dened

name

or

Dflt

(default).

This

le

contains

all

the

conguration

set-ups for

the

program

such

as:

le

directories

and

paths

test

equipment

serial

numbers

HP-IB

addresses

types

of

test

equipment

other

optional

choices

If

more

than

one

conguration

le

exists on

the disk,

the

program

will

prompt

you

to

select

a

specic

conguration

le

to

load.

If

none

exists

, the

program

will

create

a

default

le

.

P1D xxxx

The cal

factor

le

for

the

HP

8481D

sensor

.

The

variable

xxxx

represents

the

last

four digits

of

the

HP

8481D

or

HP

8484A

sensor's

serial

number

.

P2A xxxx

The

cal

factor

le

for

the

HP

8482A

sensor

.

The

variable

xxxx

represents

the

last

four

digits

of

the

HP

8482A

sensor's

serial

number

.

P3A xxxx

The

cal

factor

le

for

the

HP

8483A

sensor

.

The

variable

xxxx

represents

the

last

four

digits

of

the

HP

8483A

sensor's

serial

number

.

Stp xxxx

The

actual

attenuation

values

for

the

10

dB

step

attenuator

.

The

variable

xxxx

represents

the

last

four

digits

in

the

attenuator's

serial

number

. Attenuator

values

are

measured

at

30

MHz

on

an

accurate

system

(such as

an HP

8902A

Option

050).

Pd5 xxxx

The

actual

value

of

the

20

dB

50 attenuator

as measured

by an

accurate

system.

V

alues

are

attenuation

versus

frequency

.

The variable

xxxx

represents

the

last

four digits

in the

attenuator's serial

number

.

Pd7 xxxx

The

actual value

of the

20 dB

75 attenuator

as

measured

by

an

accurate

system.

V

alues are

attenuation versus

frequency.

The variable

xxxx

represents

the last

four digits

in the

attenuator's serial

number.

d11Bxxxx The

data

le

that

holds

the

analyzer's

test

results

(in

this

case an

HP

8711B).

The variable

xxxx

represents

the last four digits in the analyzer's serial

number. The le

\d12Bxxxx" holds data for an HP 8712B

, \d13Bxxxx" for an

HP 8713B

,etc

.

CurrDUTx The data le that holds

the test results of the most recently tested analyzer

regardless of model or serial number

. The variable

x

can represent any

character 0 to 9.

INSTALL This program is not needed but will help speed the installation of the program.

It will automatically copy the required les into the desired location.

1-12 Performance Tests

Note

Several

data

les

are

present

on

the

disk with

the \xxxx"

sux. These

are

default

les

that

allow

operation

of

the

program with

NO correction

factors.

The

values

in

these

le

are

nominal

values.

For

example: 100

percent for

all

sensor

cal

factors;

20

dB

for

the

20

dB

attenuators; 10.00,

20.00, 30

..

.dB

for

the

step

attenuator

,

and so

on. This

is provided

as a

convenience only

to

demonstrate

or

learn

about

the

program. The

default conguration

le will

access

these

les

if

no

user-dened

serial

number is

specied. A

warning

message

will

be

displayed

if

the

program

is

using

these default

les.

Conguration

File

The conguration

(cong) le

is the

le that

customizes

this

program

for

your

usage

.

It

contains

specic information

for your

setup.

Some of

the

items

contained

in

this

le

include:

the HP-IB

addresses of

all the

test equipment

the HP-IB

address of

the network

analyzer under

test

the

model

numbers

of

the test

equipment

the

serial

numbers

of

sensors

,

xed

attenuators

,

and

the

10

dB

step

attenuator

the

disk

drive

locations

(path

and

directories)

other

items

specic

to

your

setup

Ideally

,

only

one

conguration

le

should exist

on the

program

disk

so

that

the

program

will

automatically

load

only

that

le

.

However

,it

is

possible

to

have

several

conguration

les

stored

on

the

same

disk.

In

this

case,

the

program

will

list

all

of

the

available

les

and

prompt

you

to

select

one

.

This

is

useful

if more

than

one

setup

is

commonly

used

or

if

one

performance

test software

disk

serves

several

workstations

.

Getting

Started

Caution

IMPORT

ANT: Make

a

copy

of

the

performance

test

software

disk

for

day-to-day

use

.

The

master

copy

should

remain

stored

in

a

safe

place

.

This

will decrease

the

likelihood

of

damage

to

the

master

disk.

First,

nd

all

serial

numbers

of

the

calibration

devices

required, such

as step

attenuators,

sensors

,

and

xed

attenuators

for

both

50

and

75 devices

(if applicable).

Verify

the HP-IB

addresses

you

will

be

using,

as

well

as the

mass storage

directories and

locations.

If you plan to operate this program only

from the supplied oppy disk, insert the disk into the

computer's disk drive and skip step 1 below

.

Performance Tests 1-13

P

erformance

T

est

Software

Installation

1.

To

install this

program to

the hard

drive: either

copy all

les (except

\INST

ALL")

to

the

hard

drive

,

or

load and

run the

\INSTALL"

program. The

INSTALL

program will

automatically

copy

all

required

les to

your specied

destination drive

or directory

(HFS, SRM

or LIF

format).

Note

Any

directory used

must be

less

than

80

characters

long,

and

preferably

less

than

60

characters

,

for

best

visibility

.

2.

Set

the

computer's

MSI

to

the

directory

or drive

location of

the main

program

le

(CAL871XB).

3.

Load

and

run

this program.

The program

will display

the initial

screen

with

the

software

part

number

,

revision

date and

current time/date

.If

the current

time

or

date

is

incorrect,

select

the

N

NN

N

SET

TIME

softkey

to

set

it.

4.

Press

N

NN

N

RESUME

.

Remember

,

the

4

RETURN

5

key

can

also

be

used

as

softkey

#1.

5.

Press

N

CONFIG

to

enter

the

conguration

screen.

This

menu allows

you to

enter all

the specic

information

that

pertains

to

your

particular

conguration

(such

as

test equipment,

addresses,

and

serial

numbers).

The

conguration

le's

selection

descriptions

and their

initial default

values

are

listed

below

.

Note

In

the

following

section,

the

default

values

for

the

parameters

listed

in

bold

type

appear

in

parenthesis

.

The

analyzer's

HP-IB

address

(716).

The

rst

selection

is

the

analyzer

(DUT)

HP-IB

address

.

Please

note

that

this

is

the

only

address

that

has

both

the

Interface

Select

Code (ISC)

and

the

device

number

associated

with

it.

This

address

can

be

any

valid

address

with

any

valid ISC.

The

ISC

does

not

have

to

be the

same as

all

the

other

test

equipment

(which

must

be

all

on

the

same

ISC).

Generally

the

full address

for the

DUT is

set to

either

716

or

816.

This

also

sets

the

ISC

to

7

or

8 respectively

. The

factory default

HP-IB device

address

for

the

analyzer

is

16.

The

ISC

for

the

test

equipment

(7).

The

second selection

is the

ISC

for

all

the

associated

test

equipment.

This

is

generally

7

or

8 and

may be

the same

as that

for

the

DUT

.

The power

meter model

number (HP

437B)

and

address

(13).

The

selections

are

for the

power meter

model number

and address

.

Caution

The program will accept the HP 436A power meter as a valid selection, but

it is

not recommended or supported and may cause the program to halt execution.

The spectrum analyzer (HP 8566B) and address (18).

Next is the spectrum analyzer

selection. Any of the

listed models will suce

, but keep in mind that if you do not use a

frequency counter

, then the

spectrum analyzer must have high degree of frequency accuracy

since it will be used as

the frequency counter

.

The function generator model number (HP 8116A) and address (14).

The next selection is

for the function generator and address. The HP 8116A is the only valid selection at this time.

1-14 Performance Tests

The

attenuator switch

driver model

number (HP

11713A)

and

address

(28).

the

attenuator

switch driver

selection

and

address

.

At

this

time

,

the

only

two

choices are

the

HP

11713A and

`NONE'.

If

`NONE'

is

selected,

the

program

will

prompt

you

to

manually set

the

10 dB

step

attenuator

each

time

it

needs

to

be

changed.

Since

this

is

inconvenient,

the use

of

an HP

11713A

with

a

HP

8496G

model

attenuator

is

highly

recommended.

The

frequency counter

model number

(HP

5342A)

and

address

(02).

The

frequency

counter

model

number

and

its

address

are

next.

If

`NONE'

is

selected,

the

program

will

use the

spectrum

analyzer

to

measure

frequency

accuracy

.

The

voltmeter

model

number

(HP

3456A)

and

address

(22).

While

the

voltmeter

and

address

are

next,

they

are

not

currently

used

by

this

program.

The

printer

address

(01).

The

printer

address

is

next.

No

model

number

is needed

here; all

HP-IB

printers

should

work

equally

well.

The

program

directory

and

the

mass

storage

unit

specier

(the

current

MSI

device).

The

program

directory

and

Mass

Storage

Unit

Specier

(MSUS)

are

next.

These

should

point to

the

location

of

the

CAL871XB

program

and

all

of

its

required

data

les

(all the

les contained

on

the

disk).

If

you

are

running

this

program

from

a

oppy disk,

the program

directory

entry

should

be

blank.

If

using

an

HFS

or

SRM

system,

the

entire

directory

name

should

be

entered

here

(e

.g.

/TESTS/ANAL

YZER/NETWORK/8713B).

The

entire

length

must

be

less

than

80

characters

(preferably

less

than

60

for

easier

viewing).

The

MSUS,

which

indicates the

physical

address

of

the

disk

drive

,

also

has

an

80-character

limit.

When the

program is

rst run,

the

default

will

be

the

current

MSI device

.

The

data

directory

and

MSUS

.

The

next two

entries

are

the

data

directory

and

MSUS.

These

should

point

to

the

location

where

the

results of

each

DUT

will

be

stored

(if

applicable).

The

data

directory

and

MSUS

are

otherwise

similar

to the

program

directory

,

including

the

defaults

.

The sensor's

,

10

dB

step

attenuator's

,

and

xed

attenuator's

(pad's)

serial

numbers

(xxxx).

Six of

the

entries

will

contain

the

LAST

FOUR

digits

of

the

serial

numbers

for

the power

meter

sensors

,

the

step

attenuator

,

and

the

20

dB

attenuators

.

This

allows

the

program

to load

the proper

correction

values

for

each

device

.

The

disk contains

les that

match

these

default

serial

numbers

(xxxx),

but

the

correction

data

contained

within

these

les

is

invalid

(e

.g.

100

percent

for

all

sensor

cal

factors).

This

allows

the

program

to

be

run

for

experimental

or

training

purposes

only

.

As

a

precaution,

a

warning

message

will

be

displayed

if

a

default

le

is

loaded.

The

40

dB

step

attenuator

card

selection

(3).

One

of

the

is

the

40

dB

step

section.

This

species

which

of

two

40

dB

attenuator

card

sections

of

the

HP

8496G

step

attenuator

is

to

be

used.

The

HP

8496G

can use

either one

of the

two 40

dB sections;

section 3

or

4.

Enter

the

value

(3

or

4) for

which

you

have

calibration

data.

For example

, when the step attenuator was calibrated, one

of the two 40 dB sections was

selected for the 40 dB attenuation value

. The data corresponding to

the selected 40 dB section

must be input to ensure valid measurement data when using attenuations of

40 dB or greater

.

For purposes of identication, section 3 of the attenuator is the section that is engaged when

button #3 or #7 of the HP 11713A is lit.

This entry is not applicable if you are using a manual attenuator

.

The beeper (on).

The last selection will suppress or enable the beeper

, as desired.

The current DUT le sux (1).

This le, \CurrDUTx," contains the test-result data of the

current device under test. Up to ten dierent le names can be specied. This allows multiple

users to operate from one system storage medium, such as an SRM environment. This entry

can be ignored for single-user applications.

Performance Tests 1-15

6. Once

all desired

changes have

been made

,the

program

will

ask

if

you

want

to

store

the

data just

entered. A

specic 4-character

le name

sux can

be

provided

if

more

than

one

conguration is

required. Leaving

the le

name

blank

will

result

in

the

default

le

name

of

\Cfg dt". If

the program

nds only

one

cong

le

,

that

le

will

be

loaded

automatically

.

If more

than one

is discovered,

the

program

will

list

the

le

names

found

and

allow

you

to

choose one

.At

this point

the

program

will

also

ask

you

if

a

hardcopy

printout

is

desired.

7.

After

the

cong

le

has

been

generated,

the

proper

data

les

containing

the

correction

values

must be

generated. Press

N

NN

N

NN

N

CAL

DATA ENTRY

.Y

ou will

be

shown

a

list

including:

3

sensors

a

step

attenuator

two

20

dB

attenuators

(pads)

Y

ou

will

need

to

enter

the

correction

data

for

every

piece

of test

equipment included

in this

list

that

you

will

be

using

to

test

the

analyzer

.

Select

the desired

item.

Sensors

.

All

sensors

require

both

frequency

and

cal

factor

data.

Frequencies

must

always

be

in

MHz

and

cal

factors

in

percent.

The

rst

entry

requested

will

be

the

last

four

digits

of

the

serial

number

.

The

computer

will

search

for

a

current

conguration

le

containing

this

information.

If

one

is

present,

the

program

will

query

you

to

either view

or edit

the old

values

.

Assuming

you

are

editing

the

data,

the

50

MHz

reference

cal

factor will

be requested

next.

This

value

must

use

percent

as

its

units

and

be

within

the

range

of 50

and 150

percent.

After

the

cal

factor

is

entered,

the

program

will

request

that

all

frequency/cal

factor pairs

be

entered.

Y

ou

must

start

with

the

lowest

frequency

for

which

you

have

data

and

sequentially

enter

higher

frequencies

until

done

.

Each

entry must

consist

of

both

a

frequency

in

MHz

and

the

cal

factor

in

percent,

separated

by

a comma

(e

.g.

500,98.6).

Each

frequency

entered

must

be

higher

than

the

.

These cal

factor

values

must

be

between

75

and

125

percent.

If

a

mistake

is

made

,

you

can

back up

one

entry

and

re-enter

a

value

by

entering

a

negative

frequency

.

If

you

accidentally

enter

only

the

frequency (instead

of

a

frequency/cal

factor

pair), the

computer will

wait

for

the

cal

factor

to

be

entered;

however

the

only

prompt

will

be a

\?".

Each

entry is

shown on

the CRT

.

When

all

entries

are

completed,

enter

\0,0"

to

exit

the

data

entry

portion of

the program.

At this

point

the

program

will

re-display

all

values

entered

and

ask

if you

want to

store them.

Note

Even if

you

nd

a

mistake

,

it

will

be

easier

to

answer

yes

,

then

go

back

and

re-edit the

values,

otherwise

you

will

have

to

re-enter

all

values

again.

20 dB Attenuators (P

ads).

A procedure similar to the sensor data entry procedure previously

described is used to enter the frequency/attenuation values for the 20 dB attenuators

.V

alid

entries for the 20 dB attenuator range from

17.5 to 23.5 dB

.

Step Attenuator

.

Step attenuator data is only measured

at 30 MHz so only one value needs to

be entered for each nominal attenuation step

. All values

are relative to the 0 dB setting, which

is dened as zero (i.e

. the program does not care

about insertion loss at the 0 dB setting).

Valid entries are within 3 dB of the nominal attenuation setting. The program will request data

up to 110 dB of attenuation.

1-16 Performance Tests

Using

the

Program

Note

Remember

that

the

4

RETURN

5

/

4

ENTER

5

/

4

EXECUTE

5

key

can

be

used

as softkey

#1.

When

the

program

is

rst

run, the

initial information

screen is

presented. This

contains

the

program

name

,

revision

number

,

date

and other

miscellaneous information.

You

are

presented

with

four

softkey

choices:

N

NN

RESUME

,

N

NN

N

SET

TIME

,

N

HELP

,

and

N

EXIT

.

N

NN

N

SET

TIME

allows

you

to

set

the

time and

date.

If the

date

has

never

been

set,

the

program

will force

you

to

enter

it

regardless

of

whether

or

not

this

softkey

is

pressed.

N

NN

N

HELP

will

present

some

very

brief

instructions

and

other

information.

N

EXIT

will

terminate

the

program.

N

NN

RESUME

will

continue

execution

of

the

program

and

proceed

to

the

main

menu.

Main

Menu

The

main

menu

provides

seven

softkey

choices

.

An

eighth choice

may be

displayed if

you are

returning

to

this

menu

from

the

test

selection

menu.

N

NN

N

CONFIG

allows

you

to

dene

a

particular

conguration

of

test equipment,

mass storage

,

and

HP-IB addresses

. This

selection

is

described

earlier

in

\Conguration

File

."

N

NN

N

LOAD

CONFIG

allows

you

to

select

one

of

several congurations

to

choose

from.

If

only

one

is

available,

it

is

automatically

loaded

without

further

conrmation.

If

several

are

available

,

you

are

instructed to

select

one

.

N

NN

N

NN

N

CAL

DATA ENTRY

allows

you

to

enter

correction

factors

for

sensors

,

attenuators

and

attenuators

.

See

\Conguration

File

,"

earlier

in

this

chapter

.

N

NN

N

NN

N

PRINT

RESULTS

allows

you

to

print

or view

test results

from

the

current

DUT

or

any

previously

tested analyzer

,

assuming

the

data

was

archived.

Y

ou

can

also

add

comments

or

correct

any header

information

that

was

previously

entered.

N

NN

N

NEW

DUT

will

appear

only

after

an

analyzer

has

been

tested.

This

softkey

must

be

selected

before

you

begin

to

test

another

analyzer

.

Note

This

is

the

only

way

that the

program

can

tell

that

the

analyzer

under

test

has

changed. Once selected, this softkey selection will disappear

, indicating that

the program is ready to search for a new analyzer model/serial number

.

N

NNNNNNNNNN

NNNNNNNNNNNNNNNNNNNNNNNNN

NN

HP-IB Addr's

will

display the current expected addresses of all required test equipment. In

addition it

will allow you to check each listed address for the presence of an active device

.It

will not

indicate which device is set to which address

. It only indicates whether or not the

device at a given address is capable of handshaking properly

.

NNNNNNN

EXIT

returns to the previous

menu.

NNNNNNNNNNNNNNNNNNNN

RESUME

will continue the program and look for an analyzer at the specied address. Make sure

the power is switched ON and the HP-IB cable is connected before pressing

NNNNNNNNNNNNNNNNNNNN

RESUME

.

Once the program nds the network analyzer, the serial number is interrogated and the disk is

searched for any previous test results. If none are found, a message is displayed and you are

Performance Tests 1-17

then

allowed to

enter any

pertinent data

regarding

this

new

DUT

such

as

owner

,

technician,

repair

order,

comments

etc

.

The

test

selection

menu

is

then

presented.

T

est Selection

Menu

The

test selection

menu

can

be

divided

into

four

main

categories:

T

en

automated

analyzer

performance

tests

Two

automated

adjustment

procedures

F

our

utility

procedures

Two

detector

performance

tests

(HP

86200B

or

HP

86201B)

Data

for

each

of

the

ten

performance

tests

is

archived

upon

completion.

The two

adjustments

are

the

fractional-N

spur

adjustment

and

the

B*

amplitude

adjustment.

No

archive

data is

stored

for

the

adjustment

routines

.

The

four

utility

programs

are

described

as

follows:

1.

N

NN

N

NN

N

Set

Serial

Number

utility

allows

you

to

enter

a

serial

number

into

the

analyzer.

This may

be

required

after

some

types

of

repairs.

Caution

Enter

the

number

carefully

;

it

cannot

be

easily

changed once

it has

been

entered.

If

a

mistake

is

made

,

it

will

be necessary

to contact

an HP

service

center

for

correction.

2. The

N

NN

N

NN

N

NN

N

Step Attenuator

Test

is

a

cyclical

stress

test

designed

to

show

any

weakness

in

the

mechanical

(and

therefore

,

electrical)

integrity

of

the

built-in

attenuator

(Option

1E1

units

only).

F

or

each

cycle

,

the

attenuator

card

is

switched

in

and

out

with

each

resulting

trace

measured.

Minimum

and

maximum

excursions

are

then

noted.

The

test

is

performed

at

a

low

frequency

and

a

high

frequency

.

The

number

of

cycles

is

selected

by

the

user

.

A

minimum

of

twenty-ve

is

recommended.

One

hundred

cycles

will

take

about

ve

to

ten

minutes

depending

upon

computer

speed.

There

is

no

pass/fail

indication but

trace

variances

of

more

than

0.1

dB

should

warrant

further

investigation

or increased

monitoring

for

signs

of

wear

.

3.

N

NN

N

NN

N

NN

N

Measure

Step

Attenuator

and

N

NN

N

NN

N

Measure

20

dB

Pad

are

utility

les

designed

to

use

a

power

meter

to

measure

the

actual

insertion

loss at

30 MHz

for both

of

these

devices

.

These

two

routines

should

only

be

used

as

a last

resort if

no other

method of

obtaining

this

data

is

available

.

Generally

these

devices

should

be

measured using

one of

the following

methods:

Sending

the device

to a

calibration standards

lab

Measuring the device with an HP 8753D with full two-port correction

Measuring the device with an HP 8902A Option 050

Note

The listed uncertainties shown on the test results assume that one of these

three choices was

used and

not

the built-in routine which has a much higher

degree of uncertainty

.

4. The

N

NNNNNNNNNNNNNNNNNNNNNNNN

NNNNNNNNNNNNNNNNNNN

Detector tests

consists of an absolute power accuracy test and a frequency response

test as described in the

HP 86200B/86201B RF Detectors User's and Service Guide

. These

tests are only for testing these two specic detector models. Archiving of data is not done

for these tests.

1-18 Performance Tests

Miscellaneous

Information

The

program gives

full

step

by

step

instructions

along

with

connection

diagrams

.

F

or clarity

,

some

of the

required

adapters

may

not

be

depicted

in

the

connection

diagrams

.

Generally,

solid

connection

lines between

devices

indicate

a

cable

connection,

where

as

a

dotted

line

indicates

a

direct connection

(adapters

may

be

required).

All

required

equipment

should

be

connected

and

switched ON

before proceeding

with

any

test,

since

the

program

will

occasionally

need

to

write

to

a

device

before

it

is

shown

in

the

connection

diagram.

If

the

device is

not connected,

the

program

will

time-out

before

the

connection

diagram

is

drawn.

The

time-out

limit

is

set

to

30

seconds

for

all

devices

.

If

the

program

should

stop

for

any

reason,

the

computer

may be

reset

and

the

program

run

again

with

little

or

no

loss

of

data

(if

a

SCRATCH

C

is

not

performed).

Individual

T

est

Notes

And

Descriptions

The

following

sections

explain

how

each

test

is performed,

in case

it is

necessary to

perform

them

manually

without

a

computer

.

Frequency

A

ccuracy

This

test

measures

the

frequency

accuracy

of

the

analyzer

at

several

CW frequencies

while

in

trigger-hold mode

.The

device used

to

measure

the

frequency

can

either

be

a

frequency

counter

or a

spectrum analyzer

with a

high

degree

of

frequency

accuracy

.

A

ccuracy

is

measured

to

.005

percent

or

5

kHz

at

1000

MHz.

Option

1EC

analyzers

(75)

will

require

a

minimum

loss

pad

in

order

to

connect

to

a

50

frequency

counter

or

spectrum

analyzer

.

If

This

T

est

F

ails

F

ailures

of

this

test

are

rare

.

If

this

test

should

fail

by

a

small amount,

readjust

the

reference

crystal

oscillator

by

performing

the

frequency

accuracy

adjustment.

If

it

fails

by

a

signicant

amount,

and

the

A3

fractional-N/reference

assembly's

10

MHz

reference

output

is

accurate

,

suspect

excessive

noise

on

the

RF

output

of

the

source

.

See

the

section

titled

\Troubleshooting

the

A4

Source

Assembly"

in

the

\Troubleshooting

and

Block

Diagrams"

chapter

.

Gain

Compression

Gain

compression

is

measured

over

the

frequency

range

by inserting

a calibrated

20 dB

xed

attenuator

and

measuring

the

change

with

the

analyzer.

A3

dB xed

attenuator

and

through-line

cable

is

rst

connected

to

the

ports

and the

power level

set to

3dBm

for

the

HP 8713B/14B

or +13

dBm (or

max power)

for

the

HP

8711B/12B

.

The

3

dB

attenuator

is

used

to improve

any mismatch

errors.

The resulting

power is

read by

the

analyzer

.

The

calibrated

20

dB

xed

attenuator

is

then

inserted

into

the

path

and the

resulting

power

is

measured

again. The dierence is then compared to the known insertion loss of the calibrated 20

dB

xed attenuator

.

Based

on known characteristics of the receiver

, the power levels tested for both high and low

frequency units

represent the worst-case gain compression areas

. It is not necessary to test

gain compression up

to +10 dBm on the HP 8713B/14B. Experience has shown that worst-case

gain compression is generally

from 0 dBm to

0

20 dBm. Likewise the worst case compression

for the HP 8711B/12B

occurs from +10 to

0

10 dBm. Compression is tested in a narrow

(250 Hz) bandwidth.

If This Test Fails

Repeat adjustments #101 and #105. If this does not solve the problem, replace the A5 receiver

assembly.

Performance Tests 1-19

Noise

Floor

The

noise oor

test

is

divided

into

two

sections;

broadband

and

narrowband.

During

this

test

the

RF output

is

terminated

in

50

or

75

and

the

RF

input

is

shorted. F

or the

broadband

portion,

the analyzer

is

set

to

measure

B*

with

averaging

ON

and

with

a

narrow

bandwidth.

W

orst-case noise

oor

is

then

measured

starting

from

10

MHz.

F

or

narrowband

mode

,

the

noise

oor is

measured with

the

B

input

(not

B/R)

in

a

ne

bandwidth

(15

Hz)

and spur

avoid

activated.

This

portion

of

the

test

is

divided

into

two

sections:

frequencies

below

5

MHz and

frequencies

above

5

MHz.

If

This

T

est

F

ails

First

verify

that

all

cable

connections

and

screws

are

secure

,

then

repeat

adjustment

#102.

If

only

the

broadband

portion

fails

,

the

A5

receiver

diodes

may

be

bad; see

\Troubleshooting

the

A5

Receiver

Assembly"

in

the

\Troubleshooting

and

Block

Diagrams"

chapter

for

more

information.

Otherwise

,

the

A5

receiver

assembly

is

most

likely

bad,

though

spurs generated

in

either

the

A3

fractional-N/reference

or

A4

source

assemblies

can

also

cause

noise

oor failures

.

Dynamic

A

ccuracy

Dynamic

accuracy

is

measured

on

the

narrowband

B

detector

at

a

CW

frequency

of

30

MHz,

from

0

dBm

(if

possible)

down

to

0

100

dBm

in

10

dB

increments

.

A

calibrated

10

dB

step

attenuator

is

used

as

the

reference

device

.

On

75

analyzers

,two

minimum loss

pads must

be

used

to

convert

the

impedance

to

50

for

the

HP

8496A/G attenuator

.The

analyzer is

set

to

measure

the

B

input

in a

ne (15

Hz)

bandwidth.

P

ower

is

rst

measured

at

0

20

dBm

and

all

measurements

are

made

relative

to this

point (generally

this

means

the

attenuator

is

set

to

20

dB).

The

attenuator

is

then switched

in 10

dB

increments

and

the

resulting

power

is

read

from

the

analyzer

.

These

values

are

then compared

to

the

known

values

of

the

calibrated

step

attenuator

.

The

dierence

is

the

dynamic

accuracy error

of

the

analyzer

.

Mismatch errors

are

minimal

since

the

input/output

match

at

30

MHz

is

very

good.

F

or

some

combinations

of options

on

75

analyzers

,

the

0

dBm

point

may

not

be

obtainable

.

In

this

case

,

only

levels at

and

below

0

10

dBm

are

tested.

If

This T

est F

ails

First

repeat

adjustment

#102.

If

the

problem

persists

,

suspect

calibration

errors

in

the

step

attenuator

used

to

perform

this

adjustment;

see

\The

40

dB

step

attenuator

card

selection

(3)"

in

\P

erformance

T

est

Software

Installation"

earlier

in

this

chapter

.

Crosstalk

can

also

aect

this

test;

verify

that

all

cables

and

screws

are

secure

.

P

ower

Flatness

P

ower

atness

is

dened

as

the

maximum variation

in

power

at

the

RF

output

connector

across

the frequency range of the analyzer

. If the specication

is61 dB then a maximum variation of

2 dB is allowed. In this test a calibrated power sensor

is connected directly to the RF output.

The analyzer is stepped through twenty-seven CW frequencies at one power level

and each is

measured and corrected based on the power sensor cal factor

. The maximum

variation is then

compared to the specication. Several power levels are tested, ranging from the maximum

specied power to the minimum specied power without using the built in attenuator (if

applicable). If the analyzer has an attenuator

, three more levels are tested, each one using one

section of the attenuator (10 dB

,20dB

, and 30 dB). The power meter is zeroed before making

any series of measurements below019 dBm.

A second test is performed as a precaution to ensure that no power holes exist. A through

cable is connected and, starting at 10 MHz, the analyzer is swept over its frequency range using

1601 points-per-sweep. The B* input is also measured and the resulting trace is checked for

any signicant power holes that could have been missed during the previous section of this

1-20 Performance Tests

test.

The sweep

is repeated

again using

each

section

of

the

attenuator

(if

one

is

installed)

to

verify

its power

atness

.

If

This T

est

F

ails

Repeat

the test,

verifying

that

all

connections

are

secure

.

If

the

test

still

fails

,

repeat

adjustment

#104.

Absolute

A

ccuracy

This

test

veries

the

accuracy

of

the

B*

input

at

30

MHz

from

its

maximum

input

of +16

dBm

down

to

0

50

dBm

(

0

47

dBm

for

option

1EC

analyzers).

A

separate

power

source is

required

to

achieve

the

required

power

(in

this

case

an

HP

8116A

function

generator).

A

10

dB

step

attenuator

is

used

to

vary

to

power

over

the

full

66

dB

range.

The

output

of

the

HP

8116A

is

sent

through

an

optional

30

MHz bandpass

lter,

then to

the

step

attenuator

.

A

6

dB

attenuator

is

placed

after

the

attenuator and

a power

sensor

is

then

connected

to

the

attenuator

.

The

source

and

step

attenuator

are varied

in 5

dB

increments

from

+16

down

to

approximately

0

24

dBm

and

the

resulting

power is

noted. F

or

measurements

below

0

24

dBm,

the

power

out

is

calculated

based on

the step

attenuator

values

.

This

avoids

having

to

use

a

low-power

diode

sensor

(although

this

would

be

acceptable

,

it

is

an

inconvenience).

Once

the

power

levels

have

been

measured

(or

calculated)

using

the

power

meter

as

a

reference

,

the

power

sensor

is

disconnected

and the

output of

the attenuator

is

connected

to

the

RF

input

of

the

analyzer

.

The

same power

level conditions

are then

repeated

and

the

resulting

analyzer

measurements are

averaged and

recorded.

These

measurements

are

compared

to

the power

meter readings

and

any

deviations

are

compared

to

the

specication.

A

narrow

bandwidth

is used

for

all

analyzer

measurements

.

F

or

75

analyzers

,

the

6

dB

attenuator

is replaced

with

a

minimum

loss

pad.

The

30

MHz

lter

is

used

to

eliminate

any

harmonics

of

the

30

MHz signal.

However

,

in

most

cases

the

lter

can

be

eliminated. It

is

only

required

if

the

second

or

third

harmonic

of

the

HP

8116A

is

worse

than

0

30 dBc

.

If

This T

est F

ails

First

verify that

the correct

40

dB

section

of

the

attenuator

is

being

used

(if

applicable).

See

\The

40

dB

step

attenuator

card

selection

(3)"

in

\P

erformance

T

est

Software

Installation"

earlier

in

this

chapter

.

If

this

is

okay

,

repeat

adjustment

#110.

If

the

test

still

fails

,

the

cause

is

most

likely damaged

A5

receiver

diodes

.

See

\Troubleshooting

the

A5

Receiver

Assembly"

in

the

\Troubleshooting

and

Block

Diagrams"

chapter

for

more

information.

Broadband

Frequency

Response

This test checks the broadband frequency response of the B* input

at a nominal

0

6 dBm input

to the analyzer

. The RF output of the analyzer is sent

to the input of a power splitter

.One

output of the splitter is sent to the RF input of the

analyzer while a power sensor is connected

to the other output. The analyzer is stepped through a cycle of CW frequencies while the

analyzer's source power and the corrected power meter reading are noted. Once this has

been done

, the two connections to the outputs of the power splitter are swapped, and the

process is repeated. This eliminates any dierences within the power splitter

. The two readings

for each frequency point are averaged and the averaged analyzer data is compared to the

averaged power meter data. Both sets of data are subtracted from a 30 MHz reference point.

Variations in response are then relative to this point. For 75 analyzers the power splitter and

sensor must also have a 75 input impedance.Adapters are generally required for this test. If

necessary, three-way power splitters can be substituted for two-way power splitters,aslongas

the unused port is terminated in its characteristic impedance.Power dividers or splitters can be

used interchangeably with minimal measurement degradation.

Performance Tests 1-21

If

This T

est F

ails

Repeat

the test

after

verifying

that

all

connections

are

secure

.

There

is

no

corresponding

adjustment

for this

test.

V

erify

that

the

A5

receiver

assembly's

detector

diodes

are

functioning

properly

. See

\Troubleshooting

the

A5

Receiver

Assembly"

in

the

\Troubleshooting

and

Block

Diagrams"

chapter for

more

information.

Directivity

(includes

source

match

and

test

port

match)

These

tests

require

an

HP

85032B

(standard

or

option

001)

calibration

kit

for

a

50

analyzer

or

an

HP

85036B

calibration

kit

for

a

75

analyzer

.

Note

The

standard

economy

(E)

versions of

these kits

do

not

provide

the

necessary

components to

perform this

procedure.

Directivity

is

measured

by

presetting

the

analyzer

,

then

attaching a

known-good load

to the

RF

output

and

performing

a

reection measurement.

This measures

the default

calibration

of

the

analyzer

.

This

value

is

characteristically 30

dB.

A

user

calibration

will

provide

40

dB

of

directivity

,

but

for

this

test,

we

are

testing

only

the

quality

of the

default

calibration.

The

typical

specication

is

30

dB

.

The

program

prompts

you

through

all

portions

of

the

test

and

displays

the

results

on

the

screen of

the analyzer

.

Source

match is

measured at

the

same

time

as

directivity

.

This

test

can

be

performed

manually

by

taking the

following

steps:

1.

Switch

N

NN

N

NN

N

Meas

Cal

on

OFF

under

the

N

NN

N

NN

N

Meas

Cal

Options

portion

of

the service

menu to

disable

correction.

2.

P

erform

a

one-port

reection

calibration.

3.

View

the

N

NN

N

NN

N

Source

Match

array

under

the

N

NN

N

NN

N

View

Array

Master

portion

of

the

N

NN

N

NN

N

Meas

Cal

Options

menu.

Raw

directivity

can

also

be

viewed

by

selecting

the corresponding

softkey.

Do

not

confuse

this

with

the

default

directivity

above;

raw

directivity

will

be much

lower.

Input

port

match

is

measured

by

performing a

one-port cal

at the

end of

a

type-N

cable

using

the

female

standards

contained

in

the

cal

kit.

For

this reason,

the economy

version

of

the

cal

kits

cannot

be

used

since

they

do

not

contain female

standards.

Once the

user

cal

is

completed

the cable

is attached

to the

RF input

port

and

the

input

match

is

measured.

Please

note

that

when the

female open

is called

for during

this

user

calibration,

the

extender

must

be

placed over

the center

conductor of

the cable

.

If This T

est F

ails

Directivity is mostly dependent upon:

the quality

of adjustment #107

the quality of

reference load used in the adjustment

the quality the load

used in the test

If directivity should fail, repeat adjustment #107 with a known good load (better than

40 dB

of return loss). Source match is mostly dependent upon hardware in the A5 receiver assembly.

Any failures will probably require the replacement of the A5 receiver assembly.

Test port match is solely dependent upon the A5 receiver assembly. If either of these two tests

fail, rst inspect the two type-N connectors for damage, especially on 75 units. If the test port

match fails, also suspect the A5 receiver assembly diodes.

1-22 Performance Tests

Spurs

(including harmonics)

Harmonics

and spurs

are

tested

by

connecting

the

analyzer

to

a

spectrum

analyzer

via

ahigh

quality

type-N cable

.

F

or

75

analyzers

,

a

minimum

loss

pad

is

used to

change the

impedance

to

50. The

loss

through

the

cable

is

compensated

for

automatically

.

Harmonics

are

tested

at

+7

dBm minus

the

sum

of:

3

dB

for

option

1EC

1

dB

for

option

1E1

2

dB

for

HP

8711B/12B

option

1D

A/1DB

4

dB

for

HP

8713B/14B

option

1D

A/1DB

In-band

harmonics

are

tested

at

several

frequencies

.

The

second

harmonic

of

700 MHz

need

not

be

tested

on

an

HP

8711B/12B

because

its

upper

frequency

is

1300 MHz.

Out-of-band

harmonics

are

not

tested.

Fractional-N

spurs

are

also

tested

with

this

program,

as

well

as

some

other types

of spurs

but

generally

none

of

these

cause

problems

.

These

type

of spurs

have typical

(characteristic)

specications

only

.

This

automated

test

requires

that

the

spectrum

analyzer's

and

the

network

analyzer's

timebases

be

tied

together

,

so

that

any

known

spur

will

be at

the exact

frequency expected.

Connect

a

BNC

cable

between

the

spectrum

analyzer's

EXT

REF

OUT

to the

network

analyzer's

EXT

REF

IN.

This

saves signicant

time since

the

program

does

not

have

to

search

for

every

signal.

The

program

will rst

check that

the

timebases

are

connected

together

before

proceeding.

If

this

test

is performed

manually,

locking

the

two

analyzers

together

is

not

necessary

.

If

This

T

est

F

ails

Note

that while

many

types

of

spurs

are

tested,

only

harmonics

are

specied.

If

harmonics

should

fail, repeat

the

fractional-N

adjustment

as

well

as

adjustment

#104.

The

most

likely

cause

of a

failure is

the

A4

source

assembly

.

AM

Delay Modulator

(Option 1D

A/1DB

analyzers

only)

AM

delay

itself

is

not

tested

in

the

analyzer

since

it

is

a

function

of

the

external detector

used.

However

the

AM

delay

modulator

is

tested

for

functionality

.

When

the

modulator

is

on,

any

CW

signal

is

AM

modulated

with

a

27.78

kHz

sinewave

.

This

modulation

produces

sidebands

on

either

side

of

the

CW

signal

when

viewed

on

a

spectrum

analyzer

.

This

test

simply

looks

for

the

sidebands

to

be

between

22.5

and

33

dB

below

the

CW

signal

level.

The

test

is

performed

at

several

CW

frequencies

.

75

analyzers

will

need a

minimum loss

pad for

proper impedance

matching.

As

discussed

previously

,

the

spectrum

analyzer

and network

analyzer

timebases

should be connected together to avoid any frequency error

.

If This T

est F

ails

The AM delay adjustment does

not

signicantly aect this test. If this should fail, rst check

that the ribbon cable is securely attached to the AM delay modulator assembly

. Otherwise

,

replace the AM delay modulator assembly

.

Performance Tests 1-23

2

A

djustments

This chapter

contains

procedures

to

adjust

the

analyzer

.

Y

ou

need

an

external

controller

for running

three

of

the

adjustments

.

The

remaining

adjustments

are

accessed

through

the

analyzer's service

menus

.

Refer to

\Post-Repair

Procedures"

in

the

\Assembly

Replacement"

chapter

to

determine

which

adjustment

procedures

you

need

to

do

when

a

particular

part

has

been

replaced.

Y

ou

should

perform

the

adjustment

procedures

in

the

order

given

here:

1.

Fractional-N

V

CO

A

djustment

2. Fractional-N

Spur

A

djustment

(Requires

controller)

3. Frequency

A

ccuracy

A

djustment

4. Serial

Number,

A

djustment

#100

(Requires

controller

or

IB

ASIC

option

1C2)

5. LO

P

ower

Correction,

A

djustment

#101

6. Switched

Gain

Correction,

A

djustment

#102

7.

External

Detector

Correction,

A

djustment

#103

8.

A

ux

Input

Correction,

A

djustment

#111

9.

Source

P

ower

(ALC)

Correction,

A

djustment

#104

10.

B

Amplitude

Correction,

A

djustment

#105

11.

Transmission

(B/R)

Correction,

A

djustment

#106

12.

AM

Delay

Correction,

A

djustment

#112

13.

Reection

(One

P

ort)

Correction,

A

djustment

#107

14.

R*

Amplitude

Correction, A

djustment #108

15.

R*

Frequency

Response Correction,

Adjustment

#109

16. B*

Amplitude

Correction,

A

djustment

#110

(Requires

controller

or

IB

ASIC

option

1C2)

Items 1 through 3 above are

adjustments where a physical part is changed (e

.g. a

potentiometer is adjusted); no correction constants

are generated from these adjustments

.

Item 4 above (adjustment #100) does not

generate a correction constant, though the data is

entered into permanent memory on the A2 bootROM.

Caution

Procedures 5 through 16 all generate correction constants

.F

or

proper

operation, these correction constants must be handled properly

. Please read

the next few paragraphs carefully

.

Adjustments 2-1

Correction Constants

(CCs) A

djustments

Note

Please

read

the

carefully

.

When

you

switch

ON

the

analyzer's

line

power

,

the

analyzer

copies

the

current

correction

constants

from

the

CPU

EPROM

into

a

RAM

buer

.

When

you

run

the

adjustment tests

,

the

analyzer

generates

correction

constants

and

saves

them

to

the

RAM

buer

only

(they

are

erased

if

the

analyzer's

line

power

is

switched

OFF).

T

o

transfer

the

newly generated

correction

constants

from

the

RAM

to

the

EPROM,

perform

the

\Storing

and

Recalling

Correction

Constants"

procedure

in

Chapter

8.

Y

ou

should

also

use

the

procedure

in

\Storing

and

Recalling

Correction

Constants"

to

make

a

copy

of

the

correction constants

. This

allows

you

to

quickly

restore

the

adjustment

data

if

you

replace

the CPU

board or

update the

rmware

.

When

you

are

performing

the

adjustment

procedures

,

you

should

periodically store

the

correction

constants

to

a

disk

le

.

This

allows

you

to

restore

data quickly

in case

you

need

to

switch

OFF

the

analyzer's

line

power

before

completing

the

adjustments

.

Caution

If

the

analyzer's

line

power

is

switched

OFF

at any

time during

the

adjustments

,

you

must

reload

the

previously

stored

correction constants

before

proceeding.

F

ailure

to

do

so

will

result

in

loss of

previously performed

adjustment

data.

The adjustments

will have

to

be

performed

again.

2-2 Adjustments

Fractional-N V

CO A

djustment

Note

The

fractional-N

V

CO

adjustment

is not

normally required.

If this

board has

been

replaced,

the

replacement

board

will have

been adjusted

at the

factory.

This

adjustment

should

only

be

performed if

you have

reason to

believe that

the

fractional-N

V

CO assembly

is not

functioning properly

.

This

procedure

shows

you

how

to

adjust

the

frequency

of

the

fractional-N

V

CO

on

the

A3

fractional-N/reference

assembly

.

Caution

Place

the

analyzer

on

an

anti-static

mat and

wear a

connecting wrist

strap

when

making

this adjustment.

Required

Equipment

Description

Recommended

Model

or

P

art

Number

Service

extender

board

part

of

service

kit,

08712-60012

Digital

voltmeter

any

Estimated

A

djustment

Time

This

adjustment

takes

approximately

ve

minutes

to

perform.

Procedure

1.

Switch

OFF

the

analyzer's

line

power

.

Remove

the

front

panel

by

following

these

steps

and

referring

to Figure

2-1:

a.

Remove the

trim

strip

from

the

handles

by

gently

prying

it

o

with

a

small

athead

screwdriver

.

b.

Remove

the

four

#15

TORX

screws

attaching

each

handle

to

the

analyzer

.

c.

Pull

the

analyzer

toward

you

until

the

chassis

extends

about

two

inches

over

the

edge

of

the

table

top

.

d.

Grasp

and

pull

the

front

panel with

two hands:

one on

the top-middle

of the

panel, and

the

other

on

the

bottom-middle

of

the panel.

Once

the

front

panel

has

been

removed,

disconnect the front-panel ribbon cable

.

e. Remove the two #10 TORX screws attaching

the handle nut plate on the right side

.

Adjustments 2-3

Figure

2-1.

Removing

the

Handles

and

Front

P

anel

2.

T

o

setup

the

service

extender

board

for

adjusting

the

fractional-N

board

assembly

, follow

these

steps

(see

also

Figure

4-2):

a.

Remove

the

backplane

cover

from

the

rear

panel of

the

analyzer

by

unscrewing

the

two

hold-down

screws

and

sliding

the

cover

toward

the

power-cord

receptacle.

b.

Attach

the

service

extender

board

by

reversing

step

(a)

with the

lower

extender

board

assembly

.

Tighten the

two

hold-down

screws

securely

.

c.

Place

an antistatic

mat on

top

of

the

analyzer

.

d. Remove

the two

SMB cables

from the

fractional-N/reference

assembly

.

Remove

the

nut

on the

rear panel

EXT REF

BNC connector

.

e.

Use

the

handle

tab

to

loosen

the

assembly

,

then

pull

the

board

assembly

out

of

the

analyzer.

Attach

the

fractional-N/reference

assembly

backplane

connector

to

the

upper

extender board.

f. Reconnect

the SMB

cables.

If

necessary

,

use

the

longer

SMB

cables

provided

in

the

service

kit.

3. Switch ON the analyzer's line power

.

If your analyzer is an HP 8711B/12B:

set the

analyzer's source frequency to 1.3 GHz by pressing

4

PRESET54FREQ

5

NNNNNNNN

CW

4

1.3

5

NNNNNNNNNN

N

GHz

.

If your

analyzer is an HP 8713B/14B:

set the analyzer's source frequency to 1.82 GHz by pressing

4

PRESET54FREQ

5

NNNNNNNN

CW

4

1.82

5

NNNNNNNNNNN

GHz

.

4. Measure the voltage at TP11 with respect to ground on the fractional-N board assembly.See

Figure 2-2 for the location.

2-4 Adjustments

Figure

2-2.

TP11

and

L162

for

Fractional-N

V

CO A

djustment

5.

Use

a

nonconductive

adjustment

tool,

such as

a small

ceramic or

plastic atblade

screwdriver

,

to

adjust

L162

(see

Figure 2-2)

until TP11

reads

0

1.17

6

0.03

volts

with

respect

to

board

ground.

Remove

the

adjustment

tool

and

measure

the

voltage

again

to

insure

that

it

has

not

changed.

6.

If you

are going

to make

the

fractional-N

spur

adjustment,

continue

to

that

procedure

without

changing the

equipment setup

.

If

you

are

not

going

to

make

the

fractional-N

spur

adjustment,

reassemble the

analyzer.

Adjustments 2-5

Fractional-N Spur

Adjustment

Note

The

fractional-N

spur

adjustment

is

not normally

required. If

this board

has

been

replaced,

the

replacement

board

will have

been adjusted

at the

factory.

This

adjustment

should

only

be

performed if

you have

reason to

believe that

the

fractional-N

V

CO assembly

is generating

spurious responses

.

This

adjustment

minimizes

the

spurs

caused

by

the

analog

phase

interpolators

(APIs)

on

the

fractional-N

board

assembly

.

An

external

controller

sets

the

source

output

frequencies

on

the

analyzer

and

sets

up

the

spectrum

analyzer

to

measure

the

spur

.

Afterwards

,

you

can

adjust

potentiometers

to

minimize

the

spur

.

Required

Equipment

Description

Recommended

Model or

Part

Number

50

(standard)

75

(opt.1EC)

HP

B

ASIC

controller

w/B

ASIC

5.0

or

higher

HP

9000

series

200/300

HP

9000

series

200/300

T

est

software

08712-10011 08712-10011

Spectrum

analyzer

HP

8560 Series

or HP

8566B

HP

8560 Series

or HP

8566B

T

est

port

cable

8120-4781 8120-4781

Minimum

loss

pad

N/A HP

11852B

Service

extender

board

p/o

service

kit,

08712-60012

p/o

service

kit,

08712-60012

Note

Before

performing

this

adjustment:

Check

the voltage

at A3TP11

as

described

in

the

(\Fractional-N

VCO

Adjustment")

and

adjust

as

required.

Estimated

A

djustment

Time

This

adjustment

takes

approximately

fteen

minutes

to perform.

Procedure

1. If you already have the fractional-N board assembly out of the analyzer and attached

to

the service board extender

, continue with step 4. If not, continue with the next

step.

2. Switch OFF the analyzer's line power

. Remove the front panel by following these steps and

referring to Figure 2-3:

a. Remove

the trim strip from the handles

.

b. Remove the four

#15 TORX screws attaching each handle to the analyzer

.

c. Pull the analyzer toward you until the chassis extends about two inches over the

table-top.

2-6 Adjustments

d. Grasp

and pull

the front

panel with

two hands:

one

on

the

top-middle

of

the

panel,

and

the other

on the

bottom-middle of

the panel.

Once the

front

panel

has

been

removed,

disconnect the

front-panel ribbon

cable.

e. Remove

the two

#10 TORX

screws

attaching

the

handle

nut

plate

on

the

right

side

.

Figure

2-3.

Removing the

Handles

and

Front

P

anel

3.

T

o

setup

the

service

extender

board

for adjusting

the

fractional-N

board,

follow

these

steps:

a. Remove

the backplane

cover

from

the

rear

panel

of

the

analyzer

by

unscrewing

the

two

hold-down screws

and sliding

the

cover

toward

the

power-cord

receptacle

.

b. Attach

the service

extender board

by

reversing

step

(a)

with

the

lower

extender

board.

Tighten

the

screws

securely

.

c.

Place

an

antistatic

mat

on

top

of

the

analyzer

.

d.

Remove

the

two

SMB

cables

from

the

fractional-N/reference

assembly

.

Remove

the

nut

on the

rear panel

EXT

REF

BNC

connector

.

e.

Use

the

handle

tab

to

loosen

the assembly

,

then

pull

the

board

assembly

completely

out

of the analyzer

. Attach the fractional-N/reference assembly backplane

connector to the

upper extender board.

f. Reconnect the SMB cables

. If necessary

,use the

longer SMB cables provided in the

service kit.

4. Connect the equipment as shown in Figure 2-4.

Adjustments 2-7

Figure

2-4.

Setup

for

Fractional-N

Spur

A

djustments

5.

Load

and

run

the

test

software by

following the

procedure

in

\Loading

and

Running

the

T

est

Software"

in

the \P

erformance T

ests" chapter

of this

guide

.

6. Select

\Fractional-N A

djustments"

from

the

performance

tests

main

menu.

7. F

or each

API adjustment,

the

program

shows

spurs

three

times

,

once

for

each

fractional-N

VCO

frequency.

To

minimize

the

spur

,

adjust

the

potentiometers

shown

in

Figure

2-5.

You

may have

to compromise

the three

dierent adjustments

of

the

same

pot

to

achieve

the best overall results

.

Generally, the API #1 spur is the worst. When adjusting the API #2 and API #4 spurs

, their

amplitude may be so low that they are not visible

.

2-8 Adjustments

Figure

2-5.

API

and

100

kHz A

djustments

8.

After

the

API adjustment,

the program

prompts you

to adjust

for

the

100

kHz

spur

at

a

single

frequency

.

The controller

displays a

message,

telling you

when

the

adjustment

has

completed.

9.

Insert

the

fractional-N

board

assembly

back

into

the

analyzer

(do

not

reassemble

the

analyzer

completely

yet).

Run

the

spurious

signal

portion

of

the

performance

test

to

verify

that

the

API

(fractional-N

spurs)

still

pass

once

the

assembly

has

been

re-installed.

10.

If

you

do

not

need

to

repeat

the

API

and

100

kHz

spurs

adjustment,

remove

the

extender

board

and

reassemble

the

analyzer

.

Note

The

spur

performance

of

the

fractional-N

board

may

change

signicantly

when

you

reinstall

the

assembly

in

the

analyzer

.

If

the

performance

deteriorates

signicantly

,

you

may

wish

to

repeat

the

adjustment.

Adjustments 2-9

Frequency A

ccuracy A

djustment

In

this

procedure

the

frequency accuracy

of the

analyzer's source

is set

by adjusting

the

10

MHz

internal

reference

clock.

Required Equipment

Equipment

Description

Recommended

Model

or

P

art

Number

50

(standard)

75

(opt.1EC)

Frequency

counter

HP

5342A

HP

5342A

BNC

cable

8120-1839 8120-1839

Minimum

loss

pad

N/A HP

11852B

A

dapter,

type-N(m) to

BNC(f)

1250-0780 1250-0780

Estimated

A

djustment

Time

This

adjustment

takes

approximately

ve

minutes

to

perform.

Procedure

1.

Connect

the

equipment

as

shown

in

Figure

2-6.

Figure 2-6. Setup for Frequency A

ccuracy A

djustment

2. Set the frequency counter input switches to the \10

Hz - 500 MHz" and 50 positions

.

3.

On the analyzer

,press

4

PRESET54FREQ

5

NNNNNN

NN

CW

4

500

5

NNNNNN

NNNNN

MHz

4

MENU

5

(in the SOURCE keypad section)

NNNNNNNNNNNNNNNNNNNN

NNN

Trigger

NNNNNNNNNNNNNN

Hold

. If the frequency counter reading is 500 MHz

6

2500 Hz,

you do not need

to make this adjustment. However

, you can still make this adjustment to improve the

frequency accuracy

.

4. To proceed with the adjustment, disconnect the frequency counter and adapter(s) from the

RF OUTPUT connector.

2-10 Adjustments

5.

Remove the

handles and

front panel

by following

these steps

and referring

to

Figure

2-7.

a.

Remove the

trim strip

from the

handles.

b.

Remove the

screws attaching

each handle

to the

analyzer

.

c.

Pull the

analyzer toward

you until

it extends

about

two

inches

over

the

edge

of

the

table

top

.

d.

Grasp and

pull the

front panel

with

two

hands:

one

on

the

top-middle

of

the

panel,

and

the

other on

the

bottom-middle

of

the

panel.

Figure

2-7.

Removing

the

Handles

and

Front P

anel

6. Reconnect

the frequency

counter and

adapter(s) to

the

RF

OUTPUT

connector

.

7.

T

o

obtain

a

counter

reading

of

500

MHz

6

2500

Hz

or

better

,

adjust

R1

on

the

A3

fractional-N/reference

assembly

(accessible

through

a

hole

in

shield

between

J1

and

J3).

8. Reassemble

the

analyzer

.

Adjustments 2-11

Set Serial

Number,

Adjustment

#100

This

procedure

shows

you

how to

store the

analyzer's serial

number in

the CPU

bootROM.

While

this

is

not

normally

required,

you may

have to

perform this

procedure when

you replace

the

CPU

board.

Y

ou

can

only

perform

this

procedure

over

HP-IB,

so an

HP B

ASIC controller

(either

external

or

IB

ASIC)

is

required.

The performance

test software

(HP part

number 08712-10011)

can

also

be

used

to

store

the

analyzer's

serial

number.

Note

Where

XXXXXXXXXX

appears

throughout

this

procedure

,

replace

those

characters

with

the

serial

number

of

your

analyzer

but

maintain

the

leading

and

following

apostrophes

(both

are

ASCII

character

39).

F

or

example

,

if

the

serial

number

of

your

analyzer

is

US34405555,

the

HP

B

ASIC

line

of

code

would

be:

OUTPUT

716;"DIAG:SNUM

'US34405555'"

IMPORT

ANT:

Make

sure

there

is

a

space

between

SNUM

and

the

rst

apostrophe

.

Required

Equipment

A

computer with

HP-IB capabilities

is

required.

If

IB

ASIC

(option

1C2)

is

installed,

an

IBM

PC-AT

style keyboard

is

the

only

requirement.

Estimated

A

djustment

Time

This

adjustment

takes

approximately

two minutes

to

perform.

Procedure

1.

Write

down

the

10-character

serial

number

,

exactly

as

shown

on the

analyzer rear-panel

label.

2.

Use one

of the

following B

ASIC commands

to

set

the

serial

number:

(Replace

the

XXXXXXXXXX

in

the

command with

your analyzer's

serial number

.)

a.

If

you

are using

HP B

ASIC from

an external

controller

,

enter:

OUTPUT

716;"DIAG:SNUM

'XXXXXXXXXX'"

then

press

4

ENTER

5

.

On the analyzer

, press

NNNNNNNNNNNNNNNNNNNNN

NNNNNNNNNNNNNNNNNNNNNNNNN

N

Return to Local

.

This assumes that the analyzer is at address 16 and the HP-IB is at 7. If not, either use

the analyzer's actual address

, or change the analyzer's address to 16.

b. If you are using IB

ASIC:

With an external keyboard connected, press

4

ESC

5

to view the IB

ASIC command line

.

Then type the following:

OUTPUT 800;"DIAG:SNUM 'XXXXXXXXXX'"

and press

4

ENTER

5

.

c.

Press

4

SYSTEM OPTIONS

5

NNNNNNNNNNNNNNNNNNNNNNN

Service

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Instrument Info

to verify that you correctly installed

the serial number. The serial number is displayed in the dialogue box.

2-12 Adjustments

In

Case of

Diculty

If

the analyzer

displays

an

error

message

that

tells

you

the

serial

number

has

the wrong

format,

check

the rear-panel

serial

number

tag

again

and

verify

that

you

have

the

correct

serial

number

.

If

the analyzer

displays

an

error

message

that

tells

you

\Serial

number

already

set,"

that

means

a

serial

number

is

already

installed

on

that

CPU

board

and

therefore

cannot

be

changed.

Contact

your

nearest

HP

Sales

and

Service

Oce

for

instructions

.

Adjustments 2-13

LO P

ower Correction,

Adjustment

#101

Note

This

adjustment

is

only

required

for the

HP 8711B

and HP

8712B.

It is

not

required

for

the

HP

8713B

and HP

8714B.

This

procedure

adjusts

the

D

A

C

that

controls

the

LO

power

level for

optimal mixer

performance

.

Required

Equipment

Description

Recommended

Model or

Part

Number

50

(standard)

75

(opt.1EC)

Type-N

cable

8120-4781 8120-2408

Estimated

A

djustment

Time

This

adjustment

takes approximately

one minute

to perform.

Procedure

1.

Connect

a

cable

from

the

RF

OUT

port

to

the RF

IN port.

2.

Press

4

PRESET

5

4

SYSTEM

OPTIONS

5

N

Service

N

NN

N

NN

N

Test

and

Adjustments

N

NN

N

NN

N

Select

Adjustment

4

101

5

4

ENTER

5

N

NN

N

Execute

Test

.

This

is

a

fully

automated

adjustment handled

by

the

internal

rmware

.

F

ollow

the

instructions

displayed

on

the analyzer's

CRT.

3.

If

you

are

not

going

to

make

any

more

adjustments

,

nish

with

the

procedure

titled

\T

o

P

ermanently

Store

CCs

in

the

Analyzer

,"

part

of

\Storing

and

Recalling

Correction

Constants"

in Chapter

8.

If

you

are

going

to

make

more

adjustments

,

save

the

correction

constant

data

that

you

have

generated

so far

. Insert

a

formatted

disk

into

the

internal

disk

drive

.

Press

4

SYSTEM

OPTIONS

5

N

NN

N

Service

N

NN

N

NN

N

Update

Corr

Const

N

NN

N

NN

N

Store

CC

to

Disk

.

This

creates

a

le

(or

writes over

an

existing

le) where

the correction

constants are

stored.

2-14 Adjustments

Switched Gain

Correction, A

djustment #102

In

this

procedure

,

the analyzer

sets the

gain for

each analyzer

input. The

analyzer can

apply

dierent

gains

to

the

R,

A,

and B

input signals

to make

sure that

the signal

is in

the

correct

range

for

proper

ADC

(analog

to

digital converter)

operation.

Required

Equipment

Description

Recommended

Model or

P

art

Number

50

(standard)

75

(opt.1EC)

Type-N

cable

8120-4781 8120-2408

20

dB

attenuator

1

HP

8491A

Opt

020

0955-0768

V

oltage

reference

source

1

(p/o

service

kit)

08712-60031 08712-60031

1

These

items may

not

be

required;

see

text

below

.

The

required

equipment

for

this

adjustment

varies

depending

upon whether

or not

the analyzer

has

an

attenuator

installed

(Option

1E1).

If

the

analyzer has

an internal

attenuator,

then

only

a

type-N

cable

is

needed

to

complete

the adjustment.

If an

attenuator is

not installed,

then

a

20 dB

attenuator of

the

proper

impedance

will

also

be

required,

as

well

as

the

voltage

reference

source

(contained in

the service

kit).

If

a

75

20

dB attenuator

is

not

readily

available

for

option

1EC

analyzers

,

you

can

substitute

two

back-to-back

minimum

loss

pads with

a

6

dB

50

attenuator

inserted

in

between

(several

adapters

may

also

be

required).

A10

dB

50

attenuator

may

also

be

used

instead

of

the

6

dB

attenuator

.

If

the

voltage

reference

source

is

not

available

,

any

stable

dual

6

24mV

voltage

source

will

work. This

source

voltage

is

not

critical;

any

value

between

20mV

and

30mV

should

suce

.

See adjustment

#103,

next,

for

connection

information.

Estimated

A

djustment

Time

This

adjustment

takes

approximately

two

minutes

to

perform.

Procedure

1.

Press

4

PRESET

5

4

SYSTEM

OPTIONS

5

N

NN

N

NN

N

Service

N

NN

N

NN

N

NN

N

NN

N

NN

N

Test

and

Adjustments

N

NN

N

NN

N

NN

N

NN

N

NN

Select

Adjustment

4

10254ENTER

5

NNNNNNNNNNNN

NNNNNNNNNNNNNNNNNNNNNNNNN

N

Execute Test

.

2. This is a fully automated

adjustment handled by the internal rmware

.Follow the

instructions on the analyzer's display

.

The analyzer presets after the test is done

.

3. If you are

not

going to make any more adjustments

, nish with the procedure titled \T

o

Permanently Store CCs in the Analyzer" in the \Correction Constants and Firmware"

chapter of this guide.

If you

are

going to make more adjustments, save the correction constant data that you have

generated so far. Insert a formatted disk into the internal disk drive. Press

4

SYSTEM OPTIONS

5

NNNNNNNNNNNNNNNNNNNNNNN

Service

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Update Corr Const

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Store CC To Disk

. This creates a le (or writes over an

existing le) where the correction constants are stored.

Adjustments 2-15

External Detector

Correction, A

djustment #103

This

procedure

shows

you

how to

generate correction

constants for

the receiver

to make

external

detector

or

internal

broadband

measurements

.P

erform this

test whether

or not

you

plan

to

use

external

detectors

.

In

this

test,

an

accurate

6

0.5

V

is provided

to both

the X

and Y

detector

inputs

.

Required

Equipment

Description

Recommended

Model or

P

art

Number

V

oltage reference

source

1

(part

of service

kit)

08712-60031

1

See

Note

below

.

Note

If

a voltage

reference

source

is

not

available

,

connect

the

requested

voltages

to

the

external

detector

connector

as shown

in

Figure

2-8.

Note

that

both

a

positive

and

negative

voltage

are

required

simultaneously

,

and

both

must

be

referenced

to

ground.

D

=

V+

C

=

V

0

K

=

GND

These

voltages

may be

obtained

from

a

dual

power

supply

,

however

it

is

possible

to

derive

the required

voltages

from

the

external

detector

connector

itself.

B

=

0

15V with

respect

to

GND

(pin

K)

A

=

+15

with

respect

to

GND

(pin

K)

Figure 2-8. External Detector Connector, Front View

2-16 Adjustments

Estimated

Adjustment

Time

This

adjustment takes

approximately

two

minutes

to

perform.

Procedure

1.

Press

4

PRESET

5

4

SYSTEM

OPTIONS

5

N

NN

N

Service

N

NN

N

NN

N

NN

Test

and

Adjustments

N

NN

N

NN

N

Select

Adjustment

4

103

5

4

ENTER

5

N

NN

N

NN

N

Execute

Test

.

2.

This

is

a

fully

automated

adjustment

handled

by

the

internal

rmware

.

F

ollow

the

instructions

on

the

analyzer's

display

.

If

the

analyzer

fails

the

adjustment

test,

resulting

in

a

warning

message

,check

the

connections

,

voltages

,

and

switch

positions

,

then

rerun

the

test.

3.

If

you

are

not

going

to

make

any

more

adjustments

,

nish with

the procedure

titled

\T

o

P

ermanently

Store

CCs

in

the

Analyzer

,"

part

of

\Storing and

Recalling Correction

Constants"

in

Chapter

8.

If

you

are

going

to

make

more

adjustments

,

save

the

correction

constant

data

that

you

have

generated

so

far

.

Insert

a

formatted

disk

into

the

internal

disk

drive

.

Press

4

SYSTEM

OPTIONS

5

N

Service

N

Update

Corr Const

N

Store

CC To

Disk

.

This

creates

a

le

(or

writes

over

an

existing

le)

where

the

correction

constants

are

stored.

Adjustments 2-17

Auxiliary

Input Correction,

Adjustment

#111

This

procedure

shows

you

how to

generate correction

constants for

the auxiliary

input. The

procedure

measures

two

voltages

(0

and

+10.000 volts)

applied to

the auxiliary

input to

compute

the

oset

and

gain

of

the auxiliary

input circuitry

.

Required

Equipment

Description

Recommended

Model

or

P

art

Number

V

oltage reference

source

(part

of

service

kit)

08712-60031

or any

+10.000

voltage

source

.

50

BNC

cable

any

Estimated

A

djustment

Time

This

adjustment

takes

approximately

one

minute

to

perform.

Procedure

1.

Press

4

PRESET

5

4

SYSTEM

OPTIONS

5

N

NN

N

NN

N

Service

N

NN

N

NN

N

NN

N

Test

and

Adjustments

N

NN

N

NN

N

NN

Select

Adjustment

4

111

5

4

ENTER

5

N

NN

N

Execute

Test

.

2.

This

is

a

fully

automated

adjustment

handled

by

the

internal

rmware

.

F

ollow

the

instructions

on

the

analyzer's

display

.

3.

If

you

are

not

going

to

make

any

more

adjustments

,

nish

with

the

procedure

titled

\T

o

P

ermanently

Store

CCs

in

the

Analyzer

,"

part

of

\Storing

and Recalling

Correction

Constants"

in

Chapter

8.

If

you

are

going

to

make

more

adjustments

,

save

the

correction

constant

data that

you have

generated

so

far:

insert

a

formatted

disk

into

the

internal

disk

drive

.

Press

4

SYSTEM

OPTIONS

5

N

NN

N

Service

N

NN

N

NN

N

Update

Corr Const

N

NN

N

NN

N

Store

CC To

Disk

.

This creates

a

le

(or

writes

over

an

existing

le)

where

the

correction

constants

are

stored.

2-18 Adjustments

Source P

ower (ALC)

Correction, A

djustment #104

In

this

procedure

,

the analyzer

creates a

table of

values that

corrects the

source output

power

over

dierent

frequencies

and

power

levels

. The

analyzer reads

values from

apower

meter to

determine

the

actual

source

output

level.

An HP

437B or

HP 438A

(with rmware

revision 3.0

or

greater)

power

meter

is

required

for this

test. Other

power meters

will not

be controlled

correctly

by

the

analyzer

.

Note

If

your

analyzer

has

a

step

attenuator

installed

(option

1E1),

you

need

an

HP

8481D

power

sensor

to

perform

this

adjustment

procedure

.

Note

If

your

analyzer

has

rmware

revision

B

.03.00 and

does not

have an

optional

attenuator

(option

1E1),

then

you

must

update

the rmware

to revision

3.01 or

greater

.

Required Equipment

Equipment

Description

Recommended

Model

or

P

art

Number

50

(standard)

75

(opt.1EC)

P

ower

meter

HP

437B/438A

HP

437B/438A

Power

sensor

HP 8482A HP 8482A

High

sensitivity

power

sensor

(for

opt.

1E1

analyzers

only)

HP

8481D

HP

8481D

10

dB

attenuator*

HP

8491A

opt

010

N/A

Minimum

loss

pad

N/A HP

11852B

HP-IB

cable

HP

10833A

HP

10833A

*The

HP 8713B

and

HP

8714B

may

not

require

an

attenuator

for

this

adjustment.

Estimated

Adjustment

Time

This

adjustment takes

approximately ve

to ten

minutes

to

run,

depending

on

the

installed

options

.

Adjustments 2-19

Procedure

Figure

2-9.

Setup

for

Source

P

ower

Correction

Note

Before

you begin

this adjustment,

you

should

store

a

copy

of

the

correction

constants

in

a

disk

le

for

later

retrieval,

if

you

have

not

done

so

already

.

Refer

to

the

procedure

in

\Storing

and

Recalling

Correction

Constants

."

1.

Switch

ON

the

power

meter

and

let

it

warm

up

for

at

least ve

minutes

.

2.

Connect

an

HP-IB

cable

between

the

analyzer

and

the

power

meter

.

Set the

HP-IB

address

of

the

power

meter

to

13.

Disconnect

any

controller

that

may

be

on

the

HP-IB bus

.

3.

Press

4

PRESET

5

N

NN

N

NN

N

SYSTEM

OPTIONS

NN

N

Service

NN

N

NN

N

NN

N

Test

and

Adjustments

NN

N

NN

N

NN

N

Select

Adjustment

4

104

5

4

ENTER

5

N

NN

N

NN

Execute

Test

.

4.

F

ollow

the

instructions

on

the

screen.

5.

When

the

test

is

done

,

disconnect

the

power

sensor and

press

4

PRESET

5

4

SYSTEM

OPTIONS

5

N

NN

N

HP-IB

N

NN

N

NN

N

Talker/Listener

.

6.

If

you

are

not

going

to

make

any

more

adjustments

continue

with

the procedure

titled

\T

o

P

ermanently

Store

CCs

in

the

Analyzer

,"

part

of

\Storing

and Recalling

Correction

Constants"

in

Chapter

8.

If you

are

going to make more adjustments

, save the correction constant data that you have

generated

so far

. Insert a formatted disk into the internal disk drive

. Press

4

SYSTEM OPTIONS

5

NNNNNNNNNN

NNNNNNNNNNNNN

Service

NNNNNNNNNN

NNNNNNNNNNNNNNNNNNNNNNNNN

NNNNNNNNNNNNNNNNNN

Update Corr Const

NNNNNNNNNN

NNNNNNNNNNNNNNNNNNNNNNNNN

NNNNNNNNNNNNNNN

Store CC To

Disk

. This creates a le (or writes over an

existing le) where the correction constants are stored.

In Case of Diculty

If the system locks up or the power meter does not respond to

the analyzer

, make sure the

HP-IB cable is correctly connected and the HP-IB address on the power meter is set to 13.

If a \log error" occurs on the power meter during the low power adjustment and the test stops,

you will need to do the test again. Switch OFF the analyzer and preset the power meter.

If the power meter over-ranges repeatedly during this adjustment, see the note regarding

rmware revision B.03.00 on the previous page.

2-20 Adjustments

Note

If

you

must

cycle

the

analyzer's

line

power,

and you

did not

store the

correction

constants

to

disk

before

starting

this

adjustment, you

need to

repeat

all

of

the

adjustments

done

up

to this

point, then

repeat the

source

power

correction.

If

you

did

save

the

correction

constants

to disk,

recall the

correction

constants

data

from

disk

(as described

in \Storing

and Recalling

Correction

Constants"),

then

go

back

to step

1to

repeat this

adjustment.

Adjustments 2-21

B Amplitude

Correction, A

djustment #105

This

procedure

corrects

the

B narrowband

input so

that it

displays a

at 0

dB trace

with an

input

of

0

dBm

from

the

analyzer's internal

source.

Required

Equipment

Description

Recommended

Model

or

P

art

Number

50

(standard)

75

(opt.1EC)

Type-N

cable

8120-4781 8120-2408

Estimated

A

djustment

Time

This

adjustment

takes

approximately

one

minute

to

perform.

Procedure

1. Connect

a cable

from the

RF

OUT

port

to

the

RF

IN

port.

2.

Press

4

PRESET

5

4

SYSTEM

OPTIONS

5

N

NN

N

Service

N

NN

N

NN

N

NN

Test

and

Adjustments

N

NN

N

NN

N

Select

Adjustment

4

105

5

4

ENTER

5

N

NN

N

NN

N

Execute

Test

.

3.

F

ollow

the

instructions

on

the

screen.

4.

If

you

are

not

going

to

make

any

more adjustments

continue

with

procedure

titled

\T

o

P

ermanently

Store

CCs

in

the

Analyzer

,"

part of

\Storing

and

Recalling

Correction

Constants"

in

Chapter

8.

If

you

are

going to

make

adjustments

,

save

the

correction

constant

data

that

you

have

generated

so

far:

insert a

formatted disk

into

the

internal

disk

drive

.

Press

4

SYSTEM

OPTIONS

5

N

NN

N

Service

N

NN

N

NN

N

Update

Corr

Const

N

NN

N

NN

N

Store

CC

To

Disk

.

This

creates

a

le

(or

writes

over

an

existing

le)

where

the

correction

constants are

stored.

2-22 Adjustments

Transmission (B/R)

Correction, A

djustment #106

This

procedure

performs

a

transmission response

calibration to

correct for

frequency response

in

narrowband

B/R

measurements

.

It

is recommended

that you

use a

short-length, high

quality

cable

to

perform

this

adjustment.

Required

Equipment

Description

Recommended

Model

or

P

art

Number

50

(standard)

75

(opt.1EC)

Type-N

cable

8120-4781 8120-2408

Estimated

A

djustment

Time

This

adjustment

takes

approximately

one

minute

to

perform.

Procedure

1. Connect

a cable

from the

RF OUT

port

to

the

RF

IN

port.

2.

Press

4

PRESET

5

4

SYSTEM

OPTIONS

5

N

NN

N

Service

N

NN

N

NN

N

NN

Test

and

Adjustments

N

NN

N

NN

N

Select

Adjustment

4

106

5

4

ENTER

5

N

NN

N

NN

N

Execute

Test

.

3.

F

ollow

the

instructions

on

the

screen.

4.

If

you

are

not

going

to

make

any

more

adjustments,

nish

with

the

procedure

titled

\T

o

P

ermanently Store

CCs

in

the

Analyzer

,"

part

of

\Storing

and

Recalling

Correction

Constants"

in

Chapter

8.

If

you

are

going to

make adjustments

,

save

the

correction

constant

data

that

you

have

generated

so

far:

insert a

formatted disk

into

the

internal

disk

drive

.

Press

4

SYSTEM

OPTIONS

5

N

NN

N

Service

N

NN

N

NN

N

Update

Corr

Const

N

NN

N

NN

N

Store

CC

To

Disk

.

This

creates

a

le

(or

writes

over

an

existing

le)

where

the

correction

constants are

stored.

Adjustments 2-23

AM Delay

Correction, A

djustment #112

This

procedure

compensates

for

any loss

in the

analyzer's AM

delay circuitry

.

Note

This adjustment

is only

required for

analyzers

with

option

1D

A

or

option

1DB

.

Required

Equipment

Description

Recommended

Model

or

P

art

Number

50

(standard)

75

(opt.1EC)

Type-N

cable

8120-4781 8120-2408

Estimated

A

djustment Time

This

adjustment

takes

approximately

one

minute

to

perform.

Procedure

1.

Connect

a

through cable

between the

RF

IN

port

and

the

RF

OUT

port.

2.

Press

4

PRESET

5

4

SYSTEM

OPTIONS

5

N

NN

N

Service

N

NN

N

NN

N

Test

and

Adjustments

N

NN

N

NN

N

Select

Adjustment

4

112

5

4

ENTER

5

N

NN

N

NN

N

Execute

Test

.

3.

F

ollow

the

instructions

on

the

screen.

4.

If

you

are

not

going

to

make

any

more

adjustments

,

nish with

the

procedure

titled

\T

o

P

ermanently

Store

CCs

in

the

Analyzer

,"

part

of

\Storing and

Recalling Correction

Constants"

in

Chapter

8.

If

you

are

going

to make

more adjustments

,

save

the

correction

constant

data

that

you

have

generated

so

far.

Insert a

formatted disk

into the

internal

disk

drive

.

Press

4

SYSTEM

OPTIONS

5

NN

N

NN

Service

NN

N

NN

N

NN

N

Update

Corr

Const

NN

N

NN

N

NN

Store

CC

To

Disk

.

This

creates

a

le

(or

writes

over

an

existing

le)

where

the

correction

constants

are

stored.

2-24 Adjustments

Reection (One-P

ort) Correction,

Adjustment

#107

This

procedure

corrects

for

errors in

reection measurements

. The

analyzer measures

an open,

a

short,

and

a

load

to

perform a

one-port reection

calibration.

Required

Equipment

Description

Recommended

Model or

P

art

Number

50

(standard)

75

(opt.1EC)

Calibration

kit

HP

85032B/E

HP

85036B/E

Estimated

A

djustment

Time

This

adjustment

takes

approximately

three

minutes

to

perform.

Procedure

1.

Press

4

PRESET

5

4

SYSTEM

OPTIONS

5

N

NN

N

Service

N

NN

N

NN

N

Test

and

Adjustments

N

NN

N

NN

N

Select

Adjustment

4

107

5

4

ENTER

5

N

NN

N

NN

N

Execute

Test

.

2.

F

ollow

the

instructions

on

the

screen.

3.

If

you

are

not

going

to

make

any

more

adjustments

,

nish

with

the

procedure titled

\T

o

P

ermanently

Store

CCs

in

the

Analyzer

,"

part

of

\Storing

and

Recalling

Correction

Constants"

in

Chapter

8.

If

you

are

going

to

make

more

adjustments

,

save

the

correction

constant

data

that

you

have

generated

so

far

.

Insert

a

formatted

disk

into

the internal

disk

drive

.

Press

4

SYSTEM

OPTIONS

5

N

NN

N

Service

N

NN

N

NN

N

NN

Update

Corr

Const

N

NN

N

NN

N

Store

CC

To

Disk

.

This

creates

a

le

(or

writes

over

an

existing

le)

where

the

correction

constants

are

stored.

Adjustments 2-25

R* Amplitude

Correction, A

djustment #108

This

procedure

generates

correction

constants to

improve absolute

power accuracy

in R*

measurements

.

(Frequency

eects

are

corrected

in \R*

Frequency Response

Correction,

A

djustment

#109.")

Required

Equipment

Description

Recommended

Model or

P

art

Number

50

(standard)

75

(opt.1EC)

Type-N

(m)

termination

(p/o

HP

85032B/E

or

HP

85036B/E)

00909-60009 00909-60019

Caution

You

must

perform

adjustment

#103

(external

detector

correction)

and

adjustment

#104

(source

power

correction)

before

running

the

R*

amplitude

correction

adjustment.

Estimated

Adjustment

Time

This

adjustment

takes

approximately

two

minutes

to

perform.

Procedure

1.

Connect

a

termination

(included

in

the

HP 85032B/E

or

85036B/E

calibration

kit)

to

the

RF OUT

port.

2.

Press

4

PRESET

5

4

SYSTEM

OPTIONS

5

N

NN

N

Service

N

NN

N

NN

N

Test

and

Adjustments

N

NN

N

NN

N

Select

Adjustment

4

108

5

4

ENTER

5

N

NN

N

NN

N

Execute

Test

.

3.

F

ollow

the

instructions

on

the screen.

If

the

analyzer

displays

an error

message and

aborts the

adjustment, the

calibration

data

from

adjustments

#103

and

#104

are

probably corrupt

and adjustments

#103 and

#104

should

be

performed

again.

4. If

you are

not

going

to

make

any

more

adjustments

,

nish

with

the

procedure

titled

\To

Permanently

Store CCs

in

the

Analyzer

,"

part

of

\Storing

and

Recalling

Correction

Constants" in

Chapter 8.

If you

are

going to make more adjustments

, save the correction

constant data that you have

generated so far

. Insert a formatted disk into the internal disk drive

. Press

4

SYSTEM OPTIONS

5

NNNNNN

NNNNNNNNNNNNNNNNN

Service

NNNNNN

NNNNNNNNNNNNNNNNNNNNNNNNN

NNNNNNNNNNNNNNNNNNNNNN

Update Corr Const

NNNNNN

NNNNNNNNNNNNNNNNNNNNNNNNN

NNNNNNNNNNNNNNNNNNN

Store CC To Disk

. This creates a le (or writes over an

existing le) where the correction constants are stored.

2-26 Adjustments

R* Frequency

Response Correction,

Adjustment

#109

This

procedure

corrects

for

frequency response

errors in

R* measurements

.

Caution

You

must perform

adjustment #108

(R*

amplitude

correction)

before

running

the R*

frequency response

correction adjustment.

Required

Equipment

Description

Recommended

Model

or

P

art

Number

50

(standard)

75

(opt.1EC)

Type-N

(m) termination

(p/o

HP

85032B/E

or

HP

85036B/E)

00909-60009 00909-60019

Estimated

Adjustment

Time

This

adjustment

takes

approximately

one

minute

to perform.

Procedure

1.

Connect

a

termination

(included

in

the

HP

85032B/E

or

HP

85036B/E

calibration

kit)

to the

RF

OUT

port.

2.

Press

4

PRESET

5

4

SYSTEM

OPTIONS

5

N

NN

N

Service

N

NN

N

NN

N

Test

and

Adjustments

N

NN

N

NN

N

Select

Adjustment

4

109

5

4

ENTER

5

N

NN

N

Execute

Test

.

3.

F

ollow

the

instructions

on

the

screen.

4.

If

you

are

not

going

to

make

any

more

adjustments

,

nish

with

the

procedure titled

\T

o

P

ermanently

Store

CCs

in

the

Analyzer

,"

part

of

\Storing

and

Recalling

Correction

Constants"

in

Chapter

8.

If

you

are

going

to

make

more

adjustments

,

save

the

correction

constant

data

that

you have

generated

so

far

.

Insert

a

formatted

disk into

the internal

disk drive

.

Press

4

SYSTEM

OPTIONS

5

N

NN

N

Service

N

NN

N

NN

N

NN

Update

Corr Const

N

NN

N

NN

N

Store

CC To

Disk

.

This

creates

a

le

(or

writes

over

an

existing le)

where

the

correction

constants

are

stored.

Adjustments 2-27

B* Amplitude

Correction, A

djustment #110

This

adjustment

requires

a

controller to

set the

proper power

levels and

then signal

the

analyzer

that

the

proper

levels

have

been set.

There are

two ways

to perform

this adjustment:

1.

Use

the

automated

performance

test

program described

in \Instructions

for the

Network

Analyzer

P

erformance

T

est

Software"

in

Chapter

1. This

program has

a selection

for

performing

this

adjustment

labeled

\ADJUSTMENT B*

AMPLITUDE." The

conguration and

equipment

required

are

shown

in

Figures

2-10 and

2-11. Refer

to the

following

section

titled

\Running

B*

A

djustment

Correction

Using

the P

erformance T

est Software

(08712-10011)."

2.

If

your

analyzer

has

option

1C2 (IB

ASIC) or

if you

have

any

HP

8711A,

HP

8711B

,

HP

8712B

,

HP

8713B

,

or

HP

8714B

available with

this option,

the

IB

ASIC Example

Programs

Disk

(HP

P/N

08712-10003) contains

a program

that will

automate this

adjustment

without

any

external

controller

.Refer

to \Running

B* A

djustment from

IB

ASIC,"

later

in

this

section.

Caution

You

must

perform

adjustment

#103

(external

detector

correction)

before

running

the

B*

amplitude

correction

adjustment.

Running

the

B*

Amplitude

Correction

Using

the

Performance

Test

Software (08712-10011)

This adjustment

sets

up

a

30

MHz

signal

and

applies

power

levels

of

0

30

dBm

to

+18

dBm

(in 2

dB

steps)

to

the

B*

input.

The

analyzer

then

compares

the

measured

value

to

the

nominal

value and

generates

a

correction

table

.

T

o

perform

this

procedure

you

need

an

HP

B

ASIC

controller

.

The

controller

uses

the

power

meter

to

accurately

set

the

level

of

an

external

source

.

The

program

then

applies

this

signal

to

the

analyzer

,

and

then

informs

the

analyzer

when

the

level

is

correct.

This

external

source

level

is

then

measured

by

the

B*

input.

Required

Equipment

Description

Recommended

Model

or

P

art

Number

50

(standard)

75

(opt.1EC)

HP B

ASIC

controller

with

B

ASIC

5.0

or

higher

or

option

1C2

HP 9000

series

200/300

computer

HP 9000

series

200/300

computer

T

est software

08712-10011 08712-10011

Function

generator

HP

8116A

HP

8116A

Power meter HP 437B or 438A HP 437B or 438A

Power sensor HP 8482A HP 8482A

Minimum loss pad N/A HP 11852B

6 dB attenuator HP 8491 option 006 N/A

10 dB step attenuator HP 8496A/G HP 8496A/G

Attenuator/switch driver

(optional)

HP 11713A HP 11713A

HP-IB cables (4 or 5) HP 10833A HP 10833A

Type-N cable (2) 8120-4781 8120-4781

Adapter, BNC(m) to N(f) 1250-0077 1250-0077

2-28 Adjustments

Estimated

Adjustment

Time

This

adjustment takes

approximately

ve

to

ten

minutes

to

perform.

Procedure

Figure

2-10.

Setup

for

B*

Amplitude

Correction

for

50

Analyzers

Figure 2-11. Setup for B* Amplitude Correction for 75 Analyzers

1. This is a fully automated adjustment handled by the internal rmware. Refer to the

\Performance Tests" chapter for information on loading and running the software. In the

Test Selection Menu, select ADJUSTMENT B* AMPLITUDE.

2. Follow the prompts to complete the adjustment. Refer to Figure 2-10 or Figure 2-11.

Adjustments 2-29

Caution

IMPORT

ANT:

When

the

test

has

completed,

store the

correction constants

to

disk.

The

program

does

not

automatically

save

them.

3.

If you

are

not

going

to

make

any

more

adjustments

,

nish

with

the

procedure

titled

\T

oP

ermanently

Store

CCs

in

the

Analyzer

,"

part

of

\Storing

and

Recalling Correction

Constants"

in

Chapter

8.

If

you

are

going

to

make

more

adjustments

,

save

the

correction

constant

data

that

you

have

generated

so

far

.

Insert

a

formatted

disk

into

the

internal

disk

drive

.

Press

4

SYSTEM

OPTIONS

5

N

NN

N

Service

N

NN

N

NN

N

Update

Corr

Const

N

NN

N

NN

N

Store

CC

To

Disk

.

This

creates

a

le

(or

writes

over

an

existing

le) where

the

correction

constants

are

stored.

2-30 Adjustments

Running

B*

Amplitude

Correction

A

djustment

#110

from

IB

ASIC

Located

on

the

IB

ASIC

Example

Programs

Disk

(HP

part

number 08712-10003)

is a

program

called

\ADJ

110."

This

program

will

also

automate

the

B*

amplitude correction

adjustment.

No

other

controller

is

necessary

if

IB

ASIC

(option 1C2)

is installed

in your

analyzer.

Note

If

the

analyzer you

are adjusting

does not

have the

IB

ASIC

option

installed

(option

1C2),

you can

run this

adjustment from

another Option

1C2

HP

8711A/11B/12B/13B/14B

network

analyzer

.

The

following

list

of

equipment

is

required

to

run

this

program.

However

,

if your

analyzer is

a

50

unit

with

sucient

power

from

its

internal

source

,

it

may

be possible

to eliminate

the

external

HP

8116A

source

.

If

the

capabilities

exist,

the

6

dB

pad

will also

not be

required.

Note

Not

all analyzers

may be

capable of

the required

high

power

(

>

+18.3

dBm

at

30

MHz). If

this mode

of operation

is selected,

the

program

will

check

for

this

power

capability before

proceeding.

The

connection

diagram

is

similar

to

that

shown

in

Figures

2-10

and

2-11.

Required

Equipment

Description

Recommended

Model

or

P

art

Number

50

(standard)

75

(opt.1EC)

Function

generator

HP

8116A

HP

8116A

P

ower

meter

HP

437B

or

438A

HP

437B

or

438A

P

ower

sensor

HP

8482A

HP

8482A

Minimum

loss

pad

N/A HP

11852B

Attenuator

6

dB

HP

8491A

option

006

N/A

Step

attenuator

HP

8496A/G

HP

8496A/G

Attenuator/switch

driver

(optional)

HP

11713A

HP

11713A

HP-IB

cables

(3

or

4)

HP

10833A

HP

10833A

Type-N cable

(2)

8120-4781 8120-4781

Adapter, BNC(m) to N(f)

1250-0077 1250-0077

Estimated A

djustment Time

This adjustment takes approximately ve to ten minutes

to perform.

Adjustments 2-31

Procedure

1.

Switch ON

all equipment

and allow

to warm

up at

least 1/2

hour.

2.

Connect

all

devices together

via HP-IB

, preferably

using the

default addresses

.Make

sure

no

other

controller

is connected.

3.

Insert the

IBASIC

Example Programs

Disk

(HP

part

number

08712-10003)

into

the

disk

drive

of

your

option

1C2

analyzer

and

press

4

SA

VE

RECALL

5

N

NN

N

Select

Disk

N

NN

N

NN

N

Internal

3.5"

Disk

.

4.

Select

the

program

N

NN

N

ADJ_110

and

press

N

NN

N

Programs

N

NN

N

NN

N

Recall

Program

.

When recall

is

complete press

NN

N

Run

.

5.

The

program

will

ask

you

if

you

are

using

this

analyzer

as

a

controller

for another

analyzer

that

does

not

contain

IB

ASIC.

If

you

are

,

answer

\YES."

If

you

are

not

using

this

analyzer

as

a

controller

for

another analyzer

, answer

\NO."

Answer

accordingly,

then

select

the

N

CONFIG

softkey.

6.

At

this

point

you

can

congure

the

program

according

to

your equipment

requirements.

Use

the

4

*

5

and

4

+

5

keys

to

point

to

a

selection

the

press

NN

N

SELECT

or

4

ENTER

5

.

The

selected

item

can

then

be

changed,

or

in

some

cases the

selection will

simply toggle

to the

opposite

choice

.

Descriptions

of

the

menu

selections

follow:

N

NN

N

NN

N

Analyzer

Address

:

The

HP-IB

address of

the analyzer

you

will

be

controlling

(usually

16).

This

value doesn't

matter

if

you

are

not controlling

another

analyzer

.

If

selected,

you

will be

asked

to

enter

the

desired

two-digit

address

.

Use

care,

there

is

little

error

checking

on

any

data

entry.

Note

that

if

one

analyzer

is

controlling

another

analyzer,

both

of

them

cannot

be

at

the

same

address.

NN

N

NN

N

NN

N

Power Meter

Address

:

The

two-digit

HP-IB

address

,

default

is

13.

N

NN

N

NN

N

NN

N

Atten

Driver

Address

:

As

above

,

if

this

device

is

not

used,

the

address

is

irrelevant.

Default

28.

N

NN

N

NN

N

NN

N

Function

Generator

Address

:

As

above

,

if

this

device

is

not

used,

the

address

is

irrelevant.

Default

14.

N

NN

N

NN

N

NN

N

NN

N

NN

N

Power Sensor Cal

Factor

: Enter the 50 MHz reference cal factor in percent

(typically about 99-100%)

Note that this program

assumes the same value

for the 30 MHz cal

factor. Any actual dierence

is negligible

.

NNNNNNNNN

NNNNNNNNNNNNNNNNNNNNNNNNN

NNNNNNNNNNNN

Function Generator

Used

:

Default is HP 8116A. If selected, the value

toggles to `NONE.' This selection will use the

analyzer's internal source instead. Note you

must use an HP 8116A when testing a 75

analyzer.

2-32 Adjustments

N

NN

N

NN

N

NN

N

Atten/Sw

Driver Used

:

Default is

HP 11713A.

If selected,

the value

toggles to

`NONE.' This

will allow

manual setting

of the

10 dB

step attenuator

,

which

is

required

if

you are

using a

manual 10

dB

step

attenuator

such as

the HP

8495A,

HP

8496A

or

HP

355D

.

N

NN

N

NN

N

NN

N

Attenuator

40 dB

section

:

This is

only applicable

for

the

HP

8496G

automated step

attenuator.

Since

this

attenuator

has

two

40

dB

sections

,

you

must

select

which

section

is

to

be

used.

Default

is

section

3

(i.e

.

that

section

which

is

engaged

when

switch

#3

of

the

HP

11713A

is

lit).

Only

if

you

have

cal

data for

section

#4

of

the

attenuator

,

should

this

value be

changed.

If

in

doubt,

measure

each

section

to

see

which

section

you

have

data

for

.

This

data

will

be

input

below

.

N

NN

N

NN

N

NN

N

NN

N

10,

20,

30,

40

dB

section

value

:

Select

these

to

enter

the

actual

30

MHz

insertion

loss

of

each

section

of

your

attenuator

.

All

values

are

referenced

to

the

0

dB

position

of

the

attenuator

.

Use

care

when

entering

the

40

dB

section

value;

see

above

.

Generally

,

the

30

dB

value

will

be

the

sum

of

the

10

and

20

dB

sections

.

7.

When

done

entering

the

values

,

press

N

DONE

.

The

values

are

maintained

even

if

the

program

is

halted

and

then

re-run.

When

all

the

equipment

has

been

connected, switched

ON,

and

has

had

the

addresses

set,

press

N

RESUME

to

begin

the

adjustment.

The

program

will

search

for

each

HP-IB

device

.

If

any device

is

not

found,

an

error

is

reported.

Y

ou

will

be

asked

to

zero

and

calibrate

the

power sensor

.

8.

If

the

internal

analyzer

source

was

selected,

the

program

will

test the

30 MHz

output

power

capability

for

at

least

+18.3

dBm.

If

this

is

not

obtainable,

the program

will

halt;

you

must

then

use

an

HP

8116A.

9.

Follow

the instructions

on the

display.

No

connection

diagram

is

provided;

refer

to

Figure

2-10

or

Figure

2-11 if

needed. The

6dB

pad

is

not

used

if

the

HP

8116A

is

not

used

as

the

source

.

The

test is

divided into

two parts

.

First

the

power

meter

reads

the

power

from

the

source

,

adjusting

the levels

as required.

When all

the needed

levels

have

been

measured,

disconnect

the

sensor

and connect

the RF

output to

the RF

input

of

the

analyzer

under

test.

The previously

measured levels

are set

again,

and

the

analyzer

uses

these

levels

to

generate

correction

constants

.

This

adjustment takes

about

10

minutes

to

complete

.

Caution

IMPORTANT: When you are nished, save the

correction constants to disk. The

program

does not

automatically save them.

10. If you are

not

going

to make any more adjustments

, nish with the procedure titled

\ToP

ermanently Store CCs in

the Analyzer

," part of \Storing and Recalling Correction

Constants" in Chapter 8.

If you

are

going to make more adjustments, save the correction constant data that

you have generated so far. Insert a formatted disk into the internal disk drive.Press

4

SYSTEM OPTIONS

5

NNNNNNNNNNNNNNNNNNNNNNN

Service

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Update Corr Const

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Store CC To Disk

. This creates a le

(or writes over an existing le) where the correction constants are stored.

Adjustments 2-33

3

Assembly

Replacement

Introduction

This

chapter describes

how to

disassemble and

reassemble

your

network

analyzer

for

the

purpose

of replacing

a failed

assembly.

It also

contains

specic

instructions

for

repairing

or

replacing

each assembly

.

W

arning

P

arts

of

this

instrument

have

sharp

edges

.

W

ork carefully

to avoid

injury.

Required

T

ools

TORX

drivers

,

sizes

10

and

15

5/8-inch

wrench

(for

BNC

nuts)

5/16-inch

wrench

(preferably

the

modied

wrench

included in

the service

kit)

5/16-inch

nut

driver

(required

only

for

display

replacement)

Major

Assembly

Removal/Replacement

The

following

sections

describe

how

to

remove

your

analyzer's

major

assemblies

.

These

include

the:

A1

front

panel

assembly

A2

CPU

assembly

A3

fractional-N/reference

assembly

A4

source assembly

A5 receiver assembly

A6 power supply assembly

A7

CRT assembly

A8 oppy disk drive assembly (attached to the A2 CPU assembly)

Option 1EC attenuator assembly

Option 1DA/1DB AM delay assembly

Note

All assembly procedures can be described as the removal procedures performed

in reverse order.

For your convenience, brief disassembly instructions are located on a label on

the bottom of the analyzer.

Assembly Replacement 3-1

A1 Front

Panel

Assembly Replacement

Figure

3-1.

Removing

the

Handles

and

Front

P

anel

Assembly

The

A1

assembly

comes

in

two

dierent

versions:

50

and

75.

However

,

the dierence

is

only

cosmetic

.

Both

assemblies

include

all

front

panel

components

including

frame

,

keyboard,

keypad,

and

knob

.

The

assembly

does

not

include

the

model

number

nameplate

,

which

must be

ordered

separately

,

nor

does

it

include

the

type-N

connectors

which

are

part

of

the

A5 receiver

assembly

.

If

the

front

frame

has

been

damaged,

but the

keypad and

knob

are

OK,

you

can

save

money

by

ordering

only

the

following

three

parts:

Front

frame

Nameplate

(choose according

to model

number)

Front

dress panel

(choose 50

or 75

version)

How

to

Remove

the

Front

P

anel

Assembly

1. Disconnect the power cord.

2. Remove the front handles (trim strip rst). See Figure 3-1.

3. Pull the center top of the front panel up slightly and pull the center bottom down slightly to

release

the two centered catches

.

4. Pull the front panel away from the cabinet several inches

.

5. Disconnect the ribbon cable from the circuit board. If you will need to remove the A3, A4,

or A5 assemblies later, remove the handle nut plate on the right side.

If you are planning to remove the A6 or A7 assembly, you should also remove the handle

nut plate on the left side.

6. To remove the RPG knob, pull it o its splined shaft.

3-2 Assembly Replacement

7. T

o remove

the RPG,

disconnect

the

ve-wire

cable

from

A1J2.

Remove

the

knob

,

hex

nut,

and washer

.

Note

If

you

are

replacing

a probe

power fuse

, they

are located

in sockets

on the

A1

front panel

assembly.

See T

able 7-3,

Item 7.

Assembly Replacement 3-3

A2 CPU

Board Assembly

Replacement

Figure

3-2.

Removing

the

CPU

Assembly

Caution

Please

read

the

following

carefully

.

Failure

to follow

instructions may

result in

an

improperly

operating

analyzer

.

Make

a

copy of

the correction

constants

(see

Chapter

8)

before

replacing

the

A2

CPU

assembly.

Also

,

it

is

recommended

that

your

analyzer's

rmware

disk

be

available

before

replacing

the

A2

CPU

assembly

.

The

replacement

A2

CPU

assembly

may

be

shipped

from

the

factory

with

a

dierent

rmware

revision

than

your

current

rmware

revision.

If

the

replacement

A2

CPU

assembly

was

shipped

with

a

dierent

rmware

revision,

but

the

original

rmware

revision

is

desired,

you

can

restore

the

original

rmware

from

the

analyzer's

rmware

disk.

See

\Upgrading

Firmware"

in

Chapter

8.

Caution

P

erform

the

following

only

at an

approved ESD

workstation. See

Figure 4-1

in

the

\Troubleshooting and

Block Diagrams"

chapter

.

Any

A2

CPU

replacement

assembly

is

supplied

in

its

minimal

format.

This

may

not

work

in

all instances

depending upon

model

and

options

unless

the

following

instructions

are

adhered

to

.

The latest-version

rmware

will

have

already

been

installed

at

the

factory

.

If you

wish

to

change this rmware you will need a rmware

disk containing the version desired.

How to Remove the CPU Board Assembly

Perform all of the required steps listed below

,if

applicable:

1. Disconnect the power cord.

2. Disconnect all cables from the top row of connectors on the rear panel. Next, refer to

Figure 3-2 and remove the two anchoring screws just above the HP-IB connector

.

3. Remove the front panel assembly (see \How to Remove the Front Panel Assembly").

Remove both the left and right handle nut plates.

4. Remove the display assembly (see \How to Remove the Display Assembly").

5. Withdraw the CPU assembly from its cavity.

3-4 Assembly Replacement

6. Exchange

bootROMs (This

should be

done on

all units

and

must

be

done

on

any

HP 8712B/14B

).

a. Locate

bootROM U82.

See Figure

3-3.

b. Carefully

remove the

bootROMs from

both

boards

and

insert

the

original

bootROM

into

the replacement

CPU board,

making sure

that

it

is

properly

oriented.

c. Now

insert the

remaining

bootROM

into

the

old

assembly

.

Figure

3-3. BootROM

U82,

Component

Location

7. Transfer option ROMs (required for option 1C2 and some other options).

a. Locate and remove any of the following socketed option ROMs from the old CPU board

(these ROMs

are not present in all analyzers):

U137 for the

IBASIC option (1C2), and

U142 for other options

.

Insert them into the replacement CPU assembly.

8. Transfer any SIMM memory.

a. Locate any SIMM DRAM memory and transfer it to the new CPU assembly making sure

to insert them into the same corresponding location.

Assembly Replacement 3-5

b. If

SIMMs are

present, verify

the switch

S2 settings

are

also

transferred

to

the

new

assembly.

Note

As

shipped

from

the

factory

,

most

analyzers do

not have

any SIMM

memory.

9.

Transfer

the

A8

3.5"

internal

disk

drive

assembly:

Remove

the

disk

drive

from

the

old

board

and

install

it

on

the

replacement

assembly

.

10.

Transfer

all

cable

assemblies:

Remove

all

cable

assemblies

from

the

old

board

and

properly

attach

them

to

the

replacement

board.

3-6 Assembly Replacement

A3 Fractional-N/Reference

Assembly Replacement

The

A3

fractional-N/reference

assembly

consists of

the main

10 MHz

reference board

and a

fractional-N

daughter

board.

These

are

pretuned

as a

set; do

not

attempt

to order

either board

separately

.

Before

replacing

any

board,

make

sure

the

RCA

phono cable

plugs (Items

numbered 5,

6, 7,

and

8

in

T

able

7-5 of

the \P

arts List"

chapter) are

fully

seated.

If

they

are

not

seated,

the

board

may

not

t

or

it

may

generate spurs

.

Figure

3-4

depicts

an

HP

8713B/14B

. Though

the HP

8711B/12B analyzer's

cable

assemblies

are

slightly

dierent,

the

assembly/disassembly

procedures

are

the same

.

Figure 3-4.

Removing

the

Fractional-N/Reference

Assembly

How

to

Remove

the

Fractional-N/Reference

Assembly

1.

Disconnect

the

power

cord.

2.

Remove

the

front

panel

assembly

(see

\How

to

Remove the

Front P

anel

Assembly").

Remove

the handle

nut plate

on

the

right

side

only

.

3.

Disconnect, if

present, any

cable from

the

EXT

REF

IN

BNC

connector

on

the

rear

panel.

4.

Remove the

nut and

washer from

the

EXT

REF

IN

BNC

connector

on

the

rear

panel.

5.

Disconnect the

two exible

cables from

the front

of

the

assembly

.

See

Figure

3-4.

6.

Grasp

the

handle

tab

and

pull

forward

to

release

the

assembly

.

Once

released,

the

assembly

will

easily slide

out of

its

cavity

.

Assembly Replacement 3-7

A4 Source

Assembly Replacement

There

are

four

A4

source assemblies

available for

replacement. There

are both

50 and

75

versions

for

the

HP

8711B

or

HP 8712B

. There

are also

50 and

75 versions

for the

HP

8713B

or

HP

8714B

.

Make

sure

the correct

version is

ordered.

The

source

board

comes

in

two

dierent

versions

.One

is for

HP 8711B/HP

8712B analyzers

,

and

the

other

is

for HP

8713B/HP 8714B

analyzers.

Make sure

the

proper

board

is

ordered.

How

to

Remove

the

Source

Assembly

1.

Disconnect

the

power

cord.

2.

Remove

backplane cover

by unscrewing

the two

hold-down screws

and

sliding

the

cover

o.

3.

Remove

rear panel

screw (SCREW

9) located

to the

right

of

the

XA4J1

connector

.

4.

Remove

the front

panel assembly

(see \How

to Remove

the

Front

P

anel

Assembly").

Remove

the

handle nut

plate on

the right

side only

.

5. Disconnect

the four

cables

from

the

front

of

the

source

assembly

.

See

Figure

3-5.

Caution

Be

very

careful

when

reconnecting

the

semi-rigid

cables

(Items

numbered

1

and

4

in

T

able

7-1

and

T

able

7-2

in

the

\P

arts

List"

chapter).

They are

not

interchangeable

.

Ensure

that

one

cable

is

not

confused

with

the

other

.

The

possibility

exists

that

the

wrong

cable

can

be

forced

onto

the

wrong connector

,

resulting

in

damage

to

the

connectors/cables

.

6.

Grasp

the

handle

tab

and

pull

forward

to

release

the

assembly

.

Once

released, the

assembly

will

easily

slide

out

of

its

cavity

.

Note

Insure

that

SCREW

9

is

re-installed

and

secure

when

you have

completed

reassembling

the

analyzer

.

Figure 3-5. Removing the A4 Source

Assembly

3-8 Assembly Replacement

A5 Receiver

Assembly Replacement

Caution

Please

read

the

following

carefully

.F

ailure to

follow instructions

may result

in

an

improperly

operating

analyzer

.

P

erform the

following only

at an

approved ESD

workstation.

There

are

four

receiver

assemblies

available

for

replacement.

There

are

both

50

and

75

versions

for

the

HP

8711B

or

HP

8712B

.

There

are

also

50

and

75

versions

for

the

HP 8713B

or

HP

8714B

.

Make

sure

the

correct

version

is

ordered.

If

one

or

both

RF

port

connectors

are

damaged,

you

must

replace

the

plate

that contains

both

connectors

.

Do

not

attempt

to

replace

a

single

connector

by

itself.

These

connectors

have been

machine-pressed

into

the

plate

to

prevent

undesired

rotation.

It

is

not

possible

to

duplicate

this

in

the

eld.

The

replacement

A5

receiver

assemblies

are

supplied

in

their

minimal

format which

may not

work

in

all

instances

depending

upon

installed

options

.

P

erform

all

of the

required steps

below

,

if

applicable

.

Note

F

or

analyzers

with

option

1E1:

If

the

analyzer

contains

the

optional

10

dB

step attenuator

,it

is necessary

to

remove

the

attenuator/board

assembly

from

the

original

receiver

and

install

it

onto

the

new

assembly

.

Carefully

replace

the

attenuator

assembly

, ribbon

cable

(if

required),

and

any

semi-rigid

RF

coax

cables

.

F

or

analyzers

with

option 1D

A

or

1DB:

If

the

analyzer

contains

the

AM delay

option,

it

is

necessary

to

remove

the

AM

delay

board

assembly

from

the

original receiver

and

install

it

onto

the

replacement

assembly

.

Carefully

replace

the

AM delay

assembly

,

ribbon

cable

(if

required),

and

any

semi-rigid

RF

coax cables

.

Assembly Replacement 3-9

How

to Remove

the Receiver

Assembly

Figure

3-6.

Anchoring

Screw

Locations

for

A5 Receiver

Removal

1.

Disconnect

the

power

cord.

2.

Disconnect

any

cables

from the

EXT DET

x-input,

EXT

DET

y-input,

and

A

UX

INPUT

rear

panel

BNC

connectors

.

3.

Remove

nuts

and

washers

from

A

UX

INPUT

BNC

connector

.

4. Remove

the

three

anchoring

screws

on

the

bottom

of

the

analyzer

.

See

Figure

3-6.

5. Remove

the

front

panel

assembly

(see

\How

to

Remove

the

Front

P

anel

Assembly").

Remove

handle

nut

plate

from

right

side

only

.

6.

There

are

two

semi-rigid

cables

connecting

the

A5

assembly

to

the A4

assembly.

Completely

loosen

one

nut

on

each

cable

where

it

connects

to

the A4

assembly

,

then

separate

the

cable

from the A4 assembly

.

Caution

Be very careful when reconnecting the semi-rigid cables (Items numbered 1

and 4 in T

able 7-1 and T

able 7-2 in the \P

arts List" chapter). They are not

interchangeable. Ensure that one

cable is not confused with the other

. The

possibility exists that the wrong cable

can be forced onto the wrong connector

,

resulting in damage to the connectors/cables

.

7. Grasp the handle tab and pull forward to release the assembly. Once released, the assembly

will easily slide out of its cavity.

3-10 Assembly Replacement

A6 P

ower Supply

Assembly Replacement

The

power

supply

is

a single

assembly.

The only

lower level

part available

for replacement

is

the

cooling

fan.

How

to

Remove

the

P

ower

Supply Assembly

1.

Disconnect

the

power

cord.

2.

Remove

the

front

panel

assembly

(see \How

to Remove

the Front

P

anel

Assembly").

Remove

the

handle

nut

plate

on

the left

side only

.

3.

Remove

the

display

enclosure

(see

the following

section \How

to Remove

the

Display

Assembly").

4.

Remove

the four

screws along

the rear

edge of

the

display

enclosure

.

5.

Lift

open the

display access

panel and

disconnect the

two-wire

cable

from

the

power

supply

.

6.

Withdraw

the power

supply from

the housing.

Assembly Replacement 3-11

A7 Display

Assembly Replacement

The

display

consists

of

the CRT

assembly and

a matched

circuit board.

Both assemblies

must be

replaced

at

the

same

time

.

How

to

Remove

the

Display

Assembly

1.

Disconnect

the

power

cord.

2.

Remove

SCREW

7

(two

places)

as indicated

on the

rear-panel label.

3.

Remove

the

two

screws

(located

on the

display side

of the

analyzer)

from

the

bottom

of

the

analyzer

chassis

.

4.

Remove

the front

panel assembly

(see \How

to Remove

the

Front

P

anel

Assembly").

Remove

handle

nut plate

on left

side only

.

5.

Withdraw

the enclosure

2or

3 inches

from its

cavity

.

6.

Disconnect

the ribbon

cable from

the jack

behind the

top

of

the

CRT

.

7.

Withdraw

the

enclosure

completely

from

its cavity

.

Note

T

o

replace

the

power

switch

or

brightness

control:

a.

Remove

the

display

enclosure

from

the

analyzer

.

b.

Locate

the

switch

and

brightness

control

at

the

left

side

of the

display.

Remove

both

controls

from

the

display

ange

.

c.

Both

the

controls

and

their

associated

cables

must

be

replaced

as

a

unit.

3-12 Assembly Replacement

A8 3.5"

Internal Disk

Drive Assembly

Replacement

The

disk

drive

is

a non-repairable

unit and

must be

replaced if

it fails

. However

, before

replacing

the

drive

,

try

cleaning

the drive

with a

suitable cleaning

device,

or by

spraying it

with

clean

compressed

air

.

Most

\failed" drives

are only

in need

of a

cleaning. If

the drive

must

be

replaced,

you

must

recongure

the jumpers

as per

Figure 3-7.

Verify

the position

of

the

three

jumpers

and

correct them

if necessary

. The

jumpers should

connect

pins

2

and

3,

pins

6

and

7,

and

pins

15

and 16.

Figure

3-7.

A8

Disk

Drive

Jumper

Conguration

How

to

Remove

the

3.5"

Disk

Drive

Assembly

1.

Disconnect

the power

cord.

2.

Remove

the front

panel assembly

(see \How

to Remove

the

Front

P

anel

Assembly").

3.

Remove

the

CPU

assembly (see

\How to

Remove

the

CPU

Assembly").

4.

Remove

the

four

screws

anchoring

the

disk

drive

to

the

CPU

assembly

.

5.

Disconnect

the

ribbon

cable

and

power

cable

.

Attenuator

Replacement

See

\A5

Receiver

Assembly

Replacement."

AM

Delay

Modulator

Replacement

See \A5

Receiver Assembly

Replacement."

Assembly Replacement 3-13

Post

Repair Procedures

T

able

3-1

describes

the adjustments

and performance

tests that

are required

after replacing

one

or

more

of

the

analyzer's

assemblies

.

T

able

3-1.

P

ost

Repair

Procedures

Replaced Assembly Required A

djustments

Suggested V

erication

T

ests

A1

Front

P

anel

None Functional

T

est

Only

A2

CPU

Re-load

correction

constant

le

from

disk

OR

(if

CCs

are

not

available):

LO

P

ower

Correction

1

A

ux

Input

Correction

Switched

Gain

Correction

External

Detector

Correction

Source

P

ower

Correction

B

Amplitude

Correction

Transmission

(B/R)

Correction

Reection

(One

P

ort)

Correction

R*

Amplitude

Correction

R*

Frequency

Response

Correction

B*

Amplitude

Correction

AM

Delay

2

A

UX

Input

Functional

tests

only

OR:

Broadband

Frequency

Response

Dynamic

A

ccuracy

Absolute

P

ower

Accuracy

Directivity

P

ower

Flatness

A3 Fractional-N/Reference Frequency A

ccuracy A

djustment

Fractional-N

V

CO

A

djustment

Fractional-N

Spur

Adjustment

Frequency A

ccuracy

Spurious

Signals

A4

Source

LO

P

ower

Correction

1

Source

P

ower

Correction

B

Amplitude

Correction

Transmission

Correction

Reection

Correction

AM

Delay

2

P

ower

Range

and

Flatness

Spurious

Signals

A5

Receiver

LO

P

ower

Correction

1

Switched

Gain

Correction

A

ux

Input

Correction

External

Detector

Correction

Source

P

ower

Correction

B

Amplitude

Correction

Transmission

(B/R)

Correction

Reection

(One

P

ort)

Correction

R*

Amplitude

Correction

R*

Frequency

Response

Correction

B*

Amplitude

Correction

AM Delay

2

P

ower

Flatness

Broadband

Frequency

Response

Dynamic

A

ccuracy

Spurious

Signals

Absolute

P

ower

A

ccuracy

Directivity

Gain

Compression

Noise

Floor

A6

P

ower

Supply

None P

ower-on

self

tests

A7 Display Check display intensity Functional tests only

A8 3.5" Internal Disk Drive None Functional test only

Attenuator Source Power Correction

Transmission Correction

Reection Correction

Power Flatness

Directivity

AM Delay Assembly Source Power Correction

Transmission Correction

Reection Correction

AM Delay

Power Flatness

AM Delay Modulator

1

Not required for HP 8713B and HP 8714B network analyzers.

2

Only required for analyzers with option 1DAor 1DB.

3-14 Assembly Replacement

How to

Order P

arts

Refer

to

the

chapter

titled \P

arts List."

Identify the

part and

its part

number.

To

order

the

part:

1.

Use

the

part

number

listed

2.

State

the

quantity

desired

3.

A

ddress

the

order

to

the nearest

Hewlett-Packard

sales and

Service

Oce

.

See

T

able

10-1

in

the

\Safety

,

W

arranty

,

and Assistance"

chapter.

T

o

save

money

or

time

,read

the following

paragraphs.

T

o

order parts

not listed,

include the

analyzer model

number

,

complete

analyzer

serial

number

,

description

and

function of

the part,

and quantity

desired.

Save

Money

by

Ordering

R-E

(Rebuilt-Exchange)

Assemblies

If

you

need

to

replace

an

assembly

and

would

like

to

save

money

,

consider

a

R-E

(rebuilt-exchange)

assembly.

These

factory-repaired,

tested

assemblies

are

available

on

a

trade-in

basis

.

They

meet

all

factory

specications

required

of

a

new

assembly

.

They

are

designated (R-E)

in the

\P

arts

List"

chapter

.

Save

Time

by

Calling

(800)

227-8164

T

o

order

parts

as

fast

as

possible,

call the

above

number

Monday

through

Friday

,

6

AM

to

5

PM

PST

.

Y

ou

will

contact

HP

parts

specialists

with direct

on-line

access

to

the

parts

listed

in

this

manual.

F

our-day

delivery

is

standard;

one-day

(hotline)

delivery

is available

for

an

additional

charge

.

Outside

of

the

United

States

,

contact

your

nearest HP

oce

.

See

T

able

10-1

in

the

\Safety

,

W

arranty

,

and

Assistance"

chapter

.

Assembly Replacement 3-15

4

Troubleshooting

and Block

Diagrams

This chapter

is

divided

into

four

main,

symptom-related

sections

.

Refer

to

the

section

that

best

describes the

problem

you

are

observing,

based

on

the

results

of

your

initial

observation.

Category 1

Failures:

Dead or

no response

No

display

Unreadable

display

Error message/code

displayed

Category

2

F

ailures:

No error

message,

but

nonfunctional

measurement

(i.e

.

through-line

transmission

trace

is

not

at and

centered around

0

dB).

Category 3

F

ailures:

Inaccurate

(but

reasonably

functional)

measurements

.

Category

4

F

ailures:

P

eripheral

device

problems

such

as:

HP-IB

problems

printer

problems

keyboard

problems

General

Notes

W

arning

Always

unplug

the

analyzer's

line

power

before

removing

or

installing

an

assembly.

Caution

If you need to disassemble the instrument, be sure

to work at an antistatic

workstation and use a grounded wrist strap to prevent damage from

electrostatic discharge (ESD). See Figure 4-1.

Troubleshooting and Block Diagrams 4-1

Figure

4-1.

Example

of

an

Antistatic

W

orkstation

For

disassembly

procedures

,

see

\Assembly

Replacement."

W

arning

Some

parts

in

the

analyzer

have

sharp

edges

.

W

ork

carefully

to

avoid

injury

.

Before

replacing

an

assembly

,

inspect

the

board

for

obvious

,

easy-to-x

defects

.

Examples

include:

bent

pins

on

ICs

no

solder

in

holes

around

the

edges

of

shields

cold

solder

joints

Service

Kit

The

service

kit

(HP

part

number

08712-60012)

for

the

HP

8711B/12B/13B/14B analyzers

contains

several

parts

that

are

useful

for

adjusting

and

servicing

the analyzer

.The

following

parts

are

included:

An

extender

board

assembly

that

allows

you

to

operate

selected

internal

board

assemblies

outside the analyzer chassis

.

Two SMB extension cables

, 12 inches long (30 cm).

A modied 5/16-inch wrench for better

access to SMA cable nuts

.

A 6-inch (150 mm) semi-rigid coaxial extension

cable.

A non-shielded display ribbon cable used to connect

the display when the A2 CPU board is

operated outside the chassis

.

A voltage reference source used to perform several adjustments. The source provides60.5V,

6

24mV, and +10V supplies.

4-2 Troubleshooting and Block Diagrams

How

to Use

the Extender

Board

The

A2, A3,

A4,

and

A5

board

assemblies

can

all

be

operated

outside

of

the chassis

with

the

extender board.

This

can

be

very

helpful

if

you

are

troubleshooting

a

problematic

board

assembly

.

The

supplied display

ribbon

cable

is

needed

to

connect

the

display

if

the

A2

CPU

assembly

is

connected

to

the

extender

board.

The

SMB

extension

cables

may

be

needed

for

the

A3

fractional-N/reference

or

A4

source

assemblies

.

The

A4

source

and

A5

receiver

assemblies

will

need

two

exible

SMA

RF

cables

(not

supplied)

to

make

the

analyzer

fully

operational

while

either

of

these

boards

are

connected to

the

extender

board.

T

o

use

the

extender

board,

follow

these

instructions:

1.

Loosen

the

two

screws

on

the

back

cover

.

2.

Slide

the

cover

to

the

right

and

remove

it.

3.

Attach

the

lower

half

of

the

extender

assembly

to

where

the

cover

was

previously

located.

4.

Align

the

hold-down

screws

and

tighten

securely;

the

board

will

not function

if not

tightened

suciently

.

5.

Attach

the

two

ribbon

cable connectors

as shown

in

Figure

4-2.

The

board

under

test

plugs

into the

96-pin connector

.

When

properly

connected,

both

the

top

half

of

the

extender

assembly

and

the attached

board

under

test

can

rest

on

top

of

the

analyzer

.

Figure 4-2. Connecting the Extender Board

Troubleshooting and Block Diagrams 4-3

Initial

Observations

-

Normal

P

ower-up

Sequence

Prepare

the

analyzer

for

observation

by

performing

these

steps:

1.

Disconnect

all

accessories

and

peripherals

.

2.

Remove

the

disk

(if

any)

from

the

internal disk

drive.

3.

Connect

a

known-good

cable

between

the

RF

OUT

and

RF IN

ports.

Switch

ON

the

analyzer

and

watch

for

the

proper power-up

sequence:

1.

Immediately

after

the

analyzer's

line

power

is

switched on,

the disk

drive light

activates

briey

and

a

\beep"

is

audible

from

the

CPU.

2.

The

CRT

lists

the

bootROM

self-tests

being

performed. (The

CRT may

take a

few seconds

to

warm

up

.)

If

all bootROM

self-tests pass

,the

analyzer beeps

twice

.

3.

The

disk

drive

light illuminates

briey and

the rmware

loads from

ROM.

4.

The

analyzer

runs

all of

the remaining

self-tests and

the CRT

displays

the

P

ASS/F

AIL

status

of

the

self-tests

.

5.

During

the

seconds

,

these

messages

appear

on

CRT:

a.

Initializing

b.

Calculating correction

coefficients

c.

Initializing

detector

corrections

d.

Other

messages

may

appear

briey

,

depending

on

the

analyzer's

state

at

the

time

that

the

power

was

switched

o.

6.

Information

on

the

model

number

,

rmware

revision,

and

installed

options

will

be

displayed.

The

graticule

may

also

be

displayed,

depending

on

the

analyzer's

power-down

state

.

Press

4

PRESET

5

.

The

display

should

show

a

transmission

trace

(a

at

line

at

0

dB).

If

it

does

not,

ensure

the

cable

connecting

the

RF

OUT

port

to

the

RF IN

port

is

good

as

well

as

securely

connected.

If

the

analyzer

will

not

switch

on,

check

the

A

Cline

power.

Make

sure

that

the

line

voltage

selector

(below

A

C

power

plug)

is

set

correctly.

Check the

fuse.

If

the

analyzer

does

not

go

through

the

steps

above

,if

any error

messages appear

,

or

if

the

problem

persists

, refer

to the

section titled

\Category

1

F

ailures

."

Note

If

any

error

is

generated

during

the

power-up

sequence

,

the

analyzer will

halt

after

displaying

the

error

message

.

At

this

point,

if you

press any

key on

the

analyzer,

it

will

attempt

to

resume

operation.

However

,

erroneous

or

unstable

operation may result

. The option of ignoring the error message is provided

only as a troubleshooting aid.

Operator's Check

Perform the Operator's Check procedure in the \P

erformance T

ests" chapter of this

guide.Itis

a simple test of the analyzer's measurement capability

. If the test passes and peripherals

are

not involved, duplicate the operating conditions under which the system failed and refer to the

appropriate section in this chapter if the problem reoccurs.

4-4 Troubleshooting and Block Diagrams

Category 1

Failures

- Dead

or No

Response,

No Display

,

Unreadable

Display,

or

Error

Messages

on

the

Display

This

category of

failure usually

involves one

of the

following:

a

defective A6

power supply

a

defective A2

CPU

P

oor contact

with the

rear

plane

connector

board

A

digital failure

in any

board

assembly

A

defective display

Troubleshooting

A6

P

ower

Supply

Assembly

Problems

Begin

here

if

the

problem

appears

to

be power

supply related.

Check

the

Rear

P

anel

LEDs

Switch

the

analyzer's

line

power

ON.

Check

the

condition

of

the

two

LEDs

visible

through

the

hole

in the

rear panel

to the

right

of

the

A

C

power

plug.

If

the green

LED is

on and

the red

LED

is

o:

This

represents

a

normal

condition.

Continue

with

\Measure

the

P

ower

Supply

V

oltages"

to

conrm

that

the

power

supplies

are

functioning

properly

.

If

neither

LED

is

on:

Check

the

line

fuse

,

located

in

a

holder

above

the

A

C

power

jack,

and

replace

it

with

the

spare

provided

if

necessary

.

Check

the

A

C

power

line

.

If

the

LEDs

are

still

o, replace

the

power

supply

.

If

the

green

LED

is

on,

the

red

LED

is

on

steadily

,

and

the

fan

is o:

Check

the

line

voltage

selector

switch,

located

below

the

A

C

power

jack.

If

it is

correct,

remove

the

power

supply/display

assembly

and

make

sure

that the

cable from

the on/standby

switch

to

the

power

supply

assembly

is

connected.

With

the

power

supply/display

assembly

outside

the

analyzer

,plug

it in

and switch

the

analyzer's

line

power

ON..

If

the

fan

is

still

o:

Check the four green power supply LEDs visible from the right side of the display enclosure

(as viewed from the front). If the LEDs are on, the fan is probably broken. Replace the

fan or

the entire power supply assembly

.

If the green

LED is on, the red LED is on steadily

, and the fan is on:

Go to \Measure the

Power Supply V

oltages." Note that it is normal for both the green and red

LEDs to be on when

the power switch is in ST

ANDBY, but not when the switch is in the ON

position.

If the green LED is on, and the red LED is blinking:

The power supply is in shutdown. Remove the power supply/display assembly from analyzer,

plug it in and switch the analyzer's line power ON.

Troubleshooting and Block Diagrams 4-5

If

the red

LED is

still blinking:

Replace

the power

supply

.

If

the red

LED

is

now

o:

Go

to the

following

section

\Remove

Assemblies"

(the

supply

is

being

loaded

down

by

another

assembly).

Measure

the

P

ower

Supply

V

oltages

Remove

the

backplane

cover

from

the

rear

panel.

Figure

4-3

shows

the

pinout

for

J1.

There

are

four

main

supplies

,

each

with

its

own

return,

plus

the

standby

voltage

which

powers

the

nonvolatile

SRAM

on

the

CPU

board.

Measure

the

voltages

with

a

voltmeter

.V

alues should

be

within

5%

of

nominal

for

all

but

the

+13V

supply

.

Figure

4-3.

P

ower

Supply

Connector

,

as

Viewed

from

Rear

P

anel

If

the

voltages

are

not correct:

Remove

the

power

supply/display

assembly,

plug in

the

A

C

power

,

and

switch

the

analyzer's

line power

ON.

Check

the

four

power

supply

LEDs

visible

from

the

right

side

of

the

display

enclosure (as

viewed

from

the

front).

If one

or more

LEDs

are

o:

Replace the

power supply

.

If

all

the

LEDs

are

on:

Reseat the power supply/display assembly

, making sure there's a good connection to the rear

panel. Measure the voltages again. If the problem persists

, check connectors on the power

supply and on backplane board.

If the voltages are

correct, but there is a probe power problem:

Remove the front panel and

check the fuses on the back of the front-panel PC board.

Continue with the \Troubleshooting Digital Group Problems" section.

Remove Assemblies

If your problem has not been solved at this point in the troubleshooting process it is highly

probable that one of the assemblies is causing the power supply to shut down. This may be

caused by the other boards having bad contact with the backplane. Give each board a push to

4-6 Troubleshooting and Block Diagrams

make

sure it

is rmly

seated. If

the

problem

persists

,

remove

the

assemblies

one

at

a

time

,and

note

which one

is

causing

the

shutdown.

Refer

to

the

\Assembly

Replacement"

chapter

of

this

guide

for disassembly

instructions

.

Note

It

is

possible

for

the exible

metal \ngers"

or a

backplane connector

pin to

break

o

and

cause

a short,

so check

for loose

pieces of

metal.

V

erify

that none

of the

pins on

the back-panel

connector

are

bent.

This

is

a

common

cause

of

shorted

supplies.

Suggested

order

for

assembly

removal

(easiest

to

hardest):

1.

A1

front

panel

assembly

2.

A7

display

assembly

(remove

the

ribbon

cable

while

it

is

outside

the

analyzer; reinstall

and

see

if

the

power

supply

is

still

shut

down).

If

A7

display

assembly

appears to

be causing

shutdown,

open

the

display

enclosure

cover

(see

T

able

7-13

titled

\A7

Display

Assembly and

Cable

Locations"

in

the

\P

arts

List"

chapter

of

this guide)

and make

sure the

board assembly

is

rmly

seated.

3.

A3

fractional-N/reference

assembly

4.

A4

source

assembly

5.

A5

receiver

assembly

6.

A2

CPU/A8

disk

drive

assembly

Troubleshooting

Digital

Group

Problems

Error During

P

ower-up

If

there

is

no

beep

at

power-up

,

but

the

CRT

display

is

normal:

The

problem

is

probably

in

the

sound

generator

or

speaker

on

the

CPU

board.

Check

the

sound

generator

chip

(U143)

and

the

speaker

(LS1),

or

replace

the

CPU

board.

If

there

is

no

beep

at

power-up

and

no

CRT

display:

The

problem

is

most

likely

one

of

three

conditions:

No

power

to

CPU

board

(no

CPU

LEDs

on),

CPU

chip

not

plugged

into

its

socket

(CPU

LEDs will

be on),

OR

Another fault in the CPU assembly

.

Look through the TEST RESUL

TS hole on the rear panel to see if the LEDs are lit. If none

of the LEDs are lit, push the CPU board all the way into the backplane connector to ensure

a good connection. Note that it is also possible for the board to have a bad or intermittent

backplane connection and yet receive enough power to

activate the LEDs

.

If the LEDs are on, remove the CPU board

(remove rear panel screws rst). Remove the shield

from the 68020 CPU (in the center of the CPU board) and make sure it is properly seated in its

socket. Then reinstall the CPU board, making sure to push it all the way in so that it connects

properly with the backplane. If there is still no beep at power-up and CPU LED continues to

display an \8," replace the CPU (U56) or the entire CPU board.

Troubleshooting and Block Diagrams 4-7

If

the disk

drive light

does not

illuminate:

Make

sure the

power

(3-wire)

cable

and

ribbon

cable

are

connected

from

the

disk

drive to

the

CPU

board. Check

the

cables

.

The

problem

can

be

either

a

bad

disk

drive or

bad drive

circuitry

on

the CPU

.

If

a

3.5"

disk

drive

controller

error

message

appears

during

power-up

,

replace the

CPU

. Otherwise

,

replace

the

disk

drive

.

If

there

is

no

CRT

display:

A

djust

the

front

panel

intensity

knob

clockwise

to

increase

the

brightness

.

If

there

is

still no

CRT

display

,

remove

the

display

and

check

the

ribbon

cable

connection

to

the

CPU

board.

If

the

problem

persists

,

check

the

output

from

the

VIDEO

OUT

BNC

on

the

rear

panel

with an

oscilloscope

.

Check

for

activity

in

this

signal.

The

frequency

and

magnitude

may vary

.

If

the

VIDEO

OUT

signal

appears

good:

The

problem

is

most

likely

either

the

display

assembly

or

the

ribbon

cable.

If

the

VIDEO

OUT

signal

appears

bad:

The

video

circuitry

is

probably

bad.

Replace

the

CPU

or

conrm

video

signals

.

See

the

following

paragraph.

T

o

conrm

video

circuitry

problems:

Place

an

antistatic

mat

on

top of

the analyzer

.

Remove

the

CPU

and

place

it

on

top

of

an

antistatic

mat.

Use

a

service

extender (provided

with the

service

kit)

board

to

power

the

assembly

while

it

is

outside

the

analyzer

. Switch

the

analyzer

on

and

make

sure

the

green

VIDEO

ON

LED

the

display

ribbon cable

connector

is

on.

Check these

signals:

HSYNC

signal at

TP12:

24.1

kHz

TTL

signal

VSYNC

signal at

TP13: 60

Hz

TTL

signal

If

either of

these is

not

normal,

try

replacing

U101

and

U102

or

replace

the

entire

CPU

board.

If

an

error

occurs

while

rmware

is

being

loaded

(after

2

beeps

are

heard):

Reload

the

rmware

from

disk

by

inserting

the

rmware

disk

into

the

internal

disk

drive

and

switching

the

analyzer's

line

power

ON.

Press

4

BEGIN

5

at

the

Load

firmware?

query

.

The

process

will

take

a

few

minutes

.

W

atch

the

CRT

for

information

during

the

loading

procedure

.

If

the

analyzer

locks

up

during

or

after

the rmware

loading, try

clearing the

SRAM by

cycling

the

analyzer's

line

power

(rst,

switch

the

analyzer

OFF,

then

back

ON).

While

the

analyzer

is

going through its self-tests (Main and SIMM DRAM tests or shortly

afterwards), press

4

PRESET

5

a few times

. When the analyzer pauses after performing the CPU

main self-tests it displays a

query about zeroing the non-volatile SRAM. (Note the caution message!) Press

4

BEGIN

5

to zero

the SRAM. Reload the rmware from disk again.

If a self-test fails:

The analyzer indicates the number of the rst failed self-test in two ways:

An error message appears on the CRT, if possible

\Test Status" LEDs display a number code corresponding to the number of the failed test.

4-8 Troubleshooting and Block Diagrams

T

est Status

LEDs.

These include

one

red

LED

,

one

green

LED

,

and

a

7-segment

LED which

display

the digits

0

through

9.

The

red

and

green

LEDs

are

located

to

the left

of the

7-segment

LED

when viewed

from

the

rear

panel.

T

est Status

LEDs

code

.

Red

LED and

7-segment

LED

on:

test

numbers

1

through

9,

as

shown

on

7-segment

display

.

Green

LED

and

7-segment

LED

on:

tests

10

through

19.

A

dd

10

to

value shown

on

7-segment

display

.

Only

green

LED

on:

all

self-tests

passed.

T

able

4-1

lists

the

power-up

self-tests

by

number

,

with

a

description

of

the

error

messages

and

troubleshooting

information.

Some

of

the

troubleshooting

hints

may

require

the

use

of

a

service

extender

board.

Reference

designators

for

main

ICs

(e

.g.

U32)

are

noted on

the PC

boards

.

Note

that

replacing

the

defective

board

is

always

an

option;

you need

not troubleshoot

to

the

component

level.

Check

the

T

est

Status

LEDs

,

then

locate

that

test

number

in the

table to

determine what

to do

.

F

or

test

numbers

above

19,

the

name

of

the

test

is

usually in

the failure

message,

so look

for

the

test

name

in

the

T

able

4-1.

Refer

to

the \Service

Related Menus"

section

of

this

guide

for

detailed

descriptions

of

each

test.

Note

Not

all

error

messages

are

listed

in

the

table

.

Many

error

messages describe

the

problem

clearly

and

require

no further

explanation, so

they are

not included

in

this

guide

.

Some

error

messages

are

only

partially

reproduced, because

the remainder

of

the

message

is

specic

to

the

error

(e

.g. provides

address

at

which

the

failure

occurred).

<

num

>

indicates

either

an

address

or

a

value

.

These

may

be

in

decimal

or

hexadecimal

notation.

T

able

4-1.

HP

8711B/12B/13B/14B

Self-T

ests

T

est

T

est

Name

Applicable

Error

Messages

and

Notes

1 680x0

Processor

Errors

begin with

\CPU TEST

FAIL."

Remove

CPU

board,

and

ensure

U56

is

seated

its

socket.

If

test

still

fails

,

replace

CPU

board

or

U56.

2 BootROM

Checksum

Errors:

Bad checksum

table at

..

.

ROM

Checksum

F

ailure

in

bank

.

Checksum T

able is Blank. ROM may be blank.

Unexpected ROM Id at

<

num

>

Bad ROM count in Checksum table . . .

Bad ROM size in Checksum table . . .

This tests checksum of

boot ROM chip: Replace CPU board or U82.

3 Main ROM Checksum Errors: Same as for test #2.

This tests checksum of main ash EPROM. Reload rmware from oppy disk. If

test still fails, replace the CPU board or check the EPROM chips U51-U54 and U78

to U81.

Troubleshooting and Block Diagrams 4-9

T

able 4-1.

HP 8711B/12B/13B/14B

Self-Tests

(continued)

T

est

T

est Name

Applicable

Error Messages

and Notes

4 Main

DRAM

Errors:

Memory

size too

small.

Bus error

.

At

address

<

num

>

,

write

<

num

>

read

<

num

>

.

RAM

bit errors:

<

num

>

RAM

refresh

errors:

<

num

>

T

est checks

size of

main

DRAM,

writes/reads

test

patterns

.

Check

reported

size

of

DRAM

on

power-up

display

.

Memory

size

should

be

about

4

MB

.

Replace

CPU

board

or

check

the

following:

DRAM

control circuitry

U38-U41

DRAM

data

interface

chips

U69,

U84

DRAM

address

MUX

U37,

U58,

U59,

U86, U88

DRAM

chips U61-U68

5 SIMM

DRAM

Errors:

same

as

for

test

#4.

T

est checks

size of

SIMM

DRAM,

writes/reads

test

patterns

.

Check

reported

size

of

SIMM DRAM

on

power-up

display

.

Normally

0.

Make

sure

SIMMs

(if

any)

are

installed

properly:

they

must

be

installed

in

pairs

,

and

larger

size

ones

should be

in bank

0.

Check

switch

setting

on

S2.

All

switches

should be

open (up),

except for

switch 1

if

bank

0

contains

256

kB

SIMMs

,

switch

2

if

bank

0

contains

1

MB

SIMMs

,

or

switch 3

if

bank

0

contains

4

MB

SIMMs

.

Use

of

four

256

kB

SIMM

DRAMs

is

not

supported.

If problem

persists

,

replace

CPU

or

check

the

following:

Control

circuitry

U31,

U38

Data

buers

U76,

U77

A

ddress

MUX

U50,

U74,

U75

6 340x0

GSP

Processor

T

est

not

implemented

7 GSP

Video

T

est

not

implemented

8 (number

not used)

T

est number

not used

because

test

status

LED

powers

up

with

this

as

default.

An

\8"

on

the

LED

indicates

the

68020

was

unable

to

power-up and

execute basic

instructions

.

9 DSP

SRAM

Errors:

same

as

for

test

#4.

Checks program

SRAM used

by the

digital

signal

processor

.

Typical

memory

size

about

65536

bytes

.

Replace

CPU

,

or

check

SRAM

chips

U79

and

U94;

and chips

U73, U41,

U85, U93,

U60,

and

U89.

10 320C25 DSP Processor Test not implemented.

11 68020 & 320C25

Communication

Test not implemented.

12 Backplane

Bus

Errors:

Reference clock not toggling.

Unable to gain control of

DSP bus

.

Cannot perform backplane bus tests

.

Access error: wrote

<

num>, read

<

num>, right shift =

<

num

>

Source board: Failed self-test.

Receiver board: Failed self-test.

Test reads version numbers from fractional-N/ref, source, and receiver boards.

Checks for 5 MHz clock from fractional-N/reference board.

Make sure all boards are pushed in and making good contact with backplane.

Check 10 MHz output from A3J3. If not found, see \Troubleshooting Source

Group Problems." Replace CPU or check U21 and U22.

4-10 Troubleshooting and Block Diagrams

T

able 4-1.

HP 8711B/12B/13B/14B

Self-Tests

(continued)

T

est

T

est Name

Applicable

Error Messages

and Notes

13 Non-volatile

SRAM

Errors:

SRAM

battery test

FAILED

- Saved

states lost.

SRAM battery

test ERROR

-

Cannot

access

SRAM.

T

ests integrity

of battery-backed

SRAM, detects

loss of

power

to

SRAM.

Writes/reads

pattern

to

part

of

SRAM.

Remove

CPU

board

and

check

battery

BT1,

replace

if

needed.

Replace CPU

board

or

check U124

controller,

U83

SRAM,

and

U125

voltage

regulator

.

14 Digital IF

Control

Test

not

implemented.

15 CPU

Support

Circuitry

Errors:

68901

MFP

chip

test

F

AILED

.

Stuck interrupt.

T

ests

68901

Multi-Function

P

eripheral

chip

and

interrupt

circuitry

.

Replace CPU

board, or

check U133.

16 Analog

Bus

Errors:

CPU

+5V

supply

is

out

of

range!

Vpp

Flash

Supply

is

out

of

range!

T

ests

analog

bus

ADC

on

CPU

board.

Replace

CPU

,

or check

power supplies

, U109

voltage regulator

for

Vpp

.

17 Real

Time Clock

T

ests ability

to

write/read

to

real

time

clock.

18 Front

P

anel

Interface

Errors:

Front

panel

keyboard

F

AILED

.

Command

write

timeout.

Read

input

timeout.

Clear

input

buer

failed.

Echo

byte

test

failed.

T

ests

front

panel

control

processor

.

Replace

CPU

board

or check

U136, U138.

19 Floppy

Disk

Controller

Error:

Floppy Disk

controller F

AILED.

Error

number

<

num

>

Tests

controller chip

, accesses

registers

,

writes

commands

and

veries

response

.

Replace

CPU

or

check

U140.

20 HP-IB

Interface

Error:

HP-IB

test

FAILED

.

Data

bit

error

on

these

bits:

(followed by

list)

Tests HP-IB interface

, writes to chip and veries

response.T

est not performed if

anything connected to HP-IB

.

Replace CPU board or check U9, U10, U34.

21 RS-232 Interface Errors:

RS-232

interface test F

AILED.

Bus error

.

Cannot access

.

Data bit error on these bits: (followed by list)

Tests RS-232 DUART chip, accesses registers on chip, checks for clock input.

Replace CPU board or check clock U4, DUART chip U5.

Troubleshooting and Block Diagrams 4-11