HP 8746B Service manual

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OPERATING·AND

SERVICE

MANUAL

S-PARAMETER

TEST

.5-12.4

SET

GHz

87468

rh~

a:~

HEWLETT

PACKARD

"

CERTIFICATION

of

time

the

its published specifications

Hewlett-Packard, Company certifies that this product shipment from the factory. Hewlett-Packard further certifies that its calibration measurements are

traceable to the .United States National Bureau calibration facility, members.

This Hewlett-Packard instrument product

for a period pany will,

warranty service

For

Buyer shall prepay shipping charges Buyer. However, Buyer shall pay all shipping charges, duties, and taxes for products returned from another country.

warrants

HP

its programming instructions when properly installed

operation

one year from date

of

its option, either repair

at

that the instrument,

of

to the calibration facilities

and

WARRANTY

warranted against defects in material and workmanship

is

shipment. During the warranty period, Hewlett-Packard Com-

of

replace products which prove

or

repair, this product must be returned

or

its software and firmware designated by

software,

or

to

and

HP

firmware will be uninterrupted.or error free.

or

met

Standards, to the

of

shall pay shipping charges

HP

on

International Standards Organization

other

a service facility designated by

to

for use with an instrument will execute

HP

instrument.

that

extent

be defective.

to

HP

allowed

to

does

at

the Bure'au's

by

return the product

warrant

not

to

that

HP.

HP

the

to

WARRANTY

LIMITATION

The foregoing warranty shall by Buyer, Buyer-supplied software outside tenance.

OTHER

NO PLIED WARRANTIES

.EXCLUSIVE REMEDIES

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

THE SHALL NOT BE LIABLE QUENTIAL DAMAGES, WHETHER BASED ON CONTRACT,

THEORY. .

Product maintenance agreements and Packard products.

For any assistance, contact provided

OF

defects resulting from improper

to

apply

not

the environmental specifications for the product,

of

WARRANTY IS EXPRESSED

the back

at

MERCHANTABILITY AND FITNESS FOR. A PARTICULAR PURPOSE.

OF

FOR

your

this manual.

of

interfacing, unauthorized modification

or

IMPLIED. HP SPECIFICALLY DISCLAIMS

OR

ANY DIRECT, IN'DIRECT, SPECIAL, INCIDENTAL,

ASSISTANCE

customer assistance agreements

other

nearest Hewlett-Packard Sales and Service Office. Addresses are

inadequate maintenance

or

improper site preparation

or

TORT,

OR

misuse, operation

or

ANY

available for Hewlett-

are

OTHER

OR

main-

or

IM-

THE

CONSE-

LEGAL

f

I

L

S-PARAMETER TEST SET

.5-12.4

GHz

8746B

Serials Prefixed: 1114A

This manual applies directlytoHP Model 8746B

Test

Set

S-Parameter prefixed

1114A.

Units having serial numbers

Serials Prefixed: 983-

See Section VII, Manual Changes

Other Prefixes:

See Instruments CoveredbyManual, Section I

1400

Manual Part No. 08746-90007

Microfiche" Part No."08746-90008

Copyright HEWLETT-PACKARD COMPANY 1971

FOUNTAIN

GROVE

PARKWAY,

SANTA

ROSA,

CALIFORNIA,

Flidl

~aI

U.S.A.

Printed:

AUG,

1971

HEWLETT

PACKARD

TableofContents

Model 8746B

TABLE OF CONTENTS

Section Page Section

GENERAL INFORMATION.

I

Introduction

1-1.

Instruments Covered by Manual .

1-3.

Operating Information Supplement. 1-1

1-7.

TableofSpecifications .

1-9. 1-11. Supplementary Operating Characteristics.

'1-13. Recommended Test

1-15. Description 1-17.

Options. 1-19. 1-21. 1-23. Accessories Supplied 1-25. EquipmentRequired but Not Supplied 1-27. Equipment Available 1-28. 1-30. 1-32.

II INSTALLATION

2-1. 2-2. 2-4. 2-6. 2-9. 2-10. 2-12. 115/230 Volt Operation 2-14. Three-Conductor Power Cable 2-17. Operating Environment 2-20. Storage and Shipment 2-21.

III

OPERATION. 3-1. 3-3. 3-5. 3-6. 3-8. 3-10. 3-12. Operator's

3-14. Operating Instructions . 3-t5. 3-18.

3-21. 3-24. Remote Operation 3-28. 3-30. Operator's Maintenance 3-31. 3-39. 3-42. 3-44. Pushbutton Switch Bulb Replacement . 3-12

PERFORMANCE"

IV

4-1. 4-3. 4-5. 4-7.

Option 001

"Option

Model 11608A Transistor Fixture

Other Reference Line Coaxial Cables

Model 11605A Flexible Arm .

Initial Inspection .

Mechanical Check Electrical Checks . Claims for Damage

Preparation for

Power Requirements

Packaging

Introduction

Panel Features

Operating Precautions

MaximumRFPower RF MaximumDConRFLines

General Measurement Description Transistor Bias Supply Connection

Bias

Remote Operation Requirements

Care of Fuses

Introduction Equipment Required Test Record

002

PowertoTest' Device

Check.

and Adjustments .

Using

APC-7

Line Switch Bulb Replacement

TESTS

Directivity .

Equipment.

.

Use

.

a DualDCPower Supply

Connectors.

c

1-1 1-1 1-1

1-1 1-1 1-1 1-1 1-1 1-2 1-2 1-2 1-2 1-2 1-2 1-2 1-3

2-1 2-1 2-1 2-1

.

2-1 2-1 2-1 2-1 2-1 2-1 2-1 2-1

3-1 3-1 3-2 3-2 3-2 3-2 3-2 3-2 3-2 3-2

3-3 3-9 3-10 3-10 3-11 3-11 3-11 3-12

4-1 4-1 4-1 4-1 4-1

V

VI

VII

VIII

ii

4-8.

Source Match .

4-9.

Return Match .

ADJUSTMENTS . 5-1.

5-3. 5-5. 5-7.

REPLACEABLE PARTS 6-1. 6-6.

MANUAL CHANGES 7-1. Introduction

SERVICE 8-1. 8-2. 8-6. 8-12. Component Trouble Isolation 8-17. Assembly Replacement. 8-18. 8-20. 8-22. 8-25. 8-27.

8-28.

8-30.

8-32. 8-34. 8-36.

8-38. Repair 8-39. 8-41. 8-43. Troubleshooting 8-44. 8-48. 8-50.

8-52.

8-64. Schematic Diagram Notes . 8-65. 8-67.

t.~'

Introduction Equipment Required Electrical Adjustments . Mechanical Adjustments

Introduction Ordering Information

Introduction PrinciplesofOperation . Recommended Test Equipment .

Pushbutton Circuit Boards Switch Tree Switch Tree B . Step Attenuator (A6)Assembly . Line Stretcher (A5) Assembly

,Directional Coupler

Coupler)

Directional Coupler

Coupler) Directional Coupler Port Coupler 10dBAttenuator Port 1 and Port 2 Connector

Coupling Assemblies

Replaceable Parts Location Diagrams

Introduction Troubleshooting Procedure Troubleshooting from Front-Panel

Indications . Troubleshooting from the Display

Indicator

Schematic Symbols Selected/Non-Selected Terminology

A.

DC1

DC2

DC3

(Port

(Port 2

Page 4-5

4-5

5-1 5-1 5-1 5-1 5-1

6-1 6-1 6-1

7-1 7-1

~1

8-1 8-1 8-1 8-1

.

8-2 8-2 8-2

8-4

8~5

8-6

'f

8-7

8-8 8-9 8-9

8-10 8-10 8-10 8-10 8-11

8-11 8-11

8-11

8-11 8-12 8-12 8-12

Model 8746B

LIST OF ILLUSTRATIONS

List

of

lliustrations

and

Tables

Figure

1-1. Model 8746B and Accessories . . . . .

1-2. Model 11608A Transistor Fixture Mounted

on a Model 8746B . . . . . .

3-1. Block Diagram of Equipment Setup for

S-Parameter Measurement.

3-2. Front Panel Features

,.

Circuits

. .

.'

.

3-3. Rear Panel Features . 3-4. Standard

3-5. Option 001 and 002RFCircuits . . . .

3-6. Reference Line Coaxial Patch Cables . 3-7. Line Switch Bulb Replacement 3-8. Bias Voltage Input. Connections . .

3-9. Transistor Measurement . . . .

3-10. Microwave Hardware Measurement.

3-11.

APC-7

3-12. Pushbutton Selector Bulb Replacement

4-1. Directivity Test Setup . . 4-2. Source Match Test Setup . 4-3. Return Match Test Setup

Digital Counter Friction Clutch Adjustment .

5-1.

Cabinet Parts

6-1.

Front

6-2.

REFERENCE

6-3.

Outboard (W1J1) REFERENCE LINE

6-4.

REFERENCE LINE Coaxial Cable

6-5.

8-1. Troubleshooting Test Setup .

8-~.

Preliminary Troubleshooting. . .

ModelRF

Connectors . . . . . .

Panel Assembly

& TEST Channel Output and

Inboard (W3J1) REFERENCE LINE Connectors .

Connector.

Connectors (2)

Page

· 1-0

· 1-2

·

3-1

..

3-4

·

3-5

·

3-6

·

3-7

· 3-8

· 3-12

· 3-13

· 3-14 3-16

· 3-18

· 3-19

· 4-2

· 4-4

· 4-6 5-2

6-13 6-14

6-15

6-16

6-17

. 8-13

. . 8-14

Figure

8-3. Reference Channel Troubleshooting 8-4. Test Channel Troubleshooting 8-5. Assembly, 8-6. Assembly, Bottom 8-7. Index Block Diagram

Diagram. . . . . . . . .

8-8.

RF 8-9. RF Circuitry, Top View 8-18 8-10.

RF 8-11. Port 1toPort 2 Coupler Schematic. 8-12. RF Circuit, Schematic . . .

8-13. S-Parameter Troubleshooting. . . . . . . 8-20

8-14.

A4 8-15.A3Driver Assembly, Parts Location 8-16. S-Parameter Latch and Driver Circuits,

Schematic . . . . . . . . . .

8-17. Attenuation Select Troubleshooting 8-18. A4 Switch Panel Assembly Parts Location 8-19.

A2

8-20. Attenuation Latch Circuits . . . . .

8-21. Attenuation Select Troubleshooting 8-22.

A6 8-23.A3Driver Assembly, Parts Location

8-24. Attenuator Driver Circuits. . . .

8-25. Remote Control Troubleshooting . . 8-26. Remote S-Parameter, Block Diagram 8-27. Remote Attenuator, Block Diagram

8-28.A2Buffer Assembly, Parts Location 8-29. Remote Control Circuits . . 8-30. Power Supply Troubleshooting . . . 8-28 8-31. Power Supply Adjustments . . 8-28

8-32.

AlAI

8-33.A2Buffer Assembly, Parts Location . 8-29 8-34. Power Supply,

Top

View . . . . .

View

. . . . .

&Interconnection

Troubleshooting.

CircuitrY, Bottom View . . . . . . . 8-19

Switch Panel Assembly, Parts Location . . 8-20

Buffer Assembly Parts Location

Attenuator Assembly Troubleshooting

Power Supply Assembly, Parts Location . 8-28

Schematic.

..

.....

..

. . . . . . . 8-29

Page

· 8-15

· · 8-16 8-.17

· 8-17 8-1

8-18

..

8-19

..

8-19

..

8-21

· . 8-21

· . 8-22

· 8-23

· . 8-23

· . 8-24

· 8-25

· . 8-25

· 8-26

· . 8-26

..

8-27

..

8-27

7

LIST OF TABLES

..

Page

1-4

3-3 3-9

4-8

.

6-1

. 6-3

Table

1-1. Model 8746B Specifications . . . . . . . 1-3

1-2. Supplementary Operating Characteristics. . . 1-3 1-3. Recommended Test

3-1. Calibrator Display Indications . 3-2. Remote Input Connector Pin Functions . . . 3-3. Remote S-Parameter Selection Truth Table . . 3-10 3-4. Remote Attenuation Selection Truth Table . . 3-11

4-1. Performance Test Record . . . . . . .

6-1. Reference Designators and Abbreviations

Used in Parts List . . . .

6-2. Replaceable Parts . . . . . . . . .

Equipment..

Table

8-1. Servicing Aids. . . . . . . . . . .

8-2. Schematic Diagram 8-3. Paths Common to Various S-Parameter Paths 8-4. S-Parameter Truth Table . .

8-5. S-Parameter Voltage Table . . . . . .

8-6. Attenuator Truth Table . . 8-7. Attenuation Latch Voltage Table . 8-22

8-8. Attenuator Driver Truth Table . . . . . . 8-24

8-9. Attenuator Driver Voltage Table . . 8-24 8-10. Remote Control Parameter and Attenuation

Select Truth Table . . . . . 8-26

8-11. Remote Control

Notes.

Voltt;ige

. . . . . .

.. ..

Table . . . . . . 8-26

Page

·

8-1

· 8-3

· 8-18 8-20

· 8-20

8-22

iii

General Information

Model 8746B

8746B

1-0

POWER CABLE

36-PIN CONNECTOR

Figure 1-1. Model

8746B

REFERENCE LINE

RACK

and Accessories

MOUNTING

KIT

Model 8746B

General

Information

I

r

~

I

SECTION

GENERAL

1-1. INTRODUCTION

1-2. This manual contains all to

install, Hewlett-Packard Model 8746B S-Parameter Test Set. This section covers description, options, accessories, other is

the

a

reprintofthe Figure 1-1 shows supplied Model manual is

1-3. INSTRUMENTS COVERED BY

1-4.

The

ries a nine-digit

four

first last five digits sequential suffix, uniquetoeach individual instrument.

1-5. This manualisdirectly applicabletoinstruments listed Prefix numbers lower page, refer for

correcting errors,

of

this after yellow Manual Changes

I

the

front are keyed number, and

they

the

manual current manual as Hewlett-Packard recommends request Complimentary copies available from all Hewlett-Packard offices.

1-6.

For

prefixes

Changes supplement,

Packard office.

operate,

basic information. Included Operating Information

with

or

Option

the

TableofSpecifications.

Model 8746B S-Parameter digits

with

Serial Prefix numbers

on

the

title

to

Section VII.

manualtocover instruments

the

printingofthe coverofthe

to

both

are revised as

current

the

latest Manual Changes supplement.

information concerning serial

not

listed

test,

first

three

all

of

the

instrument

001

and

one-letter serial

form

the

of

the

page.

than

and

manual.

the

manual's

of

which appear

and

on

the

contact

infonnation

adjust

instrument

sectionsofthis manual.

the

or

002.

serial prefix

serial

For

instruments

those

Import~nt

for adaptIng

manual, is provided in a

supple~ent

often

accurate.

of

these supplements are

title pageorin a Manual

and

sp~cifica~ions

WIth

Supplement

equipment

for Table 1-1 m

number

the

listedonthe

These supplements

print

on

as necessarytokeep

To

accurate as possible,

that

you

the

nearest Hewlett-

required

service

identification,

thIS manual

which

normally

the

st~ndard

MANUAL

Test

Set

number.

form

same as those

with

information

the

contents

manufactured

inserted

date

and

the

title page,

maintain

periodically

number

The The

Serial

title

under

part

I

INFORMATION

ment

should stay

the

instrument

the

and

is

the

car-

the

ordered through

1-9. TABLE OF SPECIFICATIONS

1-10. Complete specifications 1-1. These specifications are standards may

be tested. Use these limits incoming inspectionorat ance

of

1-11. SUPPLEMENTARY OPERATING

CHARACTERISTleS

1-12. Table 1-2 lists supplementary operating characteristics. These values are but

are included

1-13. RECOMMENDED TEST EQUIPMENT

1-14. Table 1-3 lists recommended for performance testing, troubleshooting, maintenance.

1-15. DESCRIPTION

1-16. The HP Model 8746B S-Parameter contains measuring all four s-parameters passive two-port device from Model 8746B is designed primarilytobe the

Hewlett-Packard Model

ture.

However, measurements devices sary coaxial line-lengths in line.

The phase-amplitude· Model Vector s-parameter are automatically pushbuttons Attenuationofthe set

with front-panel contact-closures. Figure 3-4isa diagramofthe circuits for

with

the

instrument

pperator.

your

or

limits against which.

the

instrument

for

the

necessary microwave circuits

may

also

be

Model

8410A

Voltmeter. Measuring circuits

8746B ratio

Network AnalyzerorModel

or

with

the

standard 8746B.

Additional copies

local Hewlett-Packard offIce.

c:rre

the

when

any

time

is in question.

not

the

information.ofthe

of

0.5to12.4

11608A

on

other

made

by

inserting

the

rea:

is used WIth a compatIble

indicator, such as

set

with

remote-contact

incident

RF

signals can also

pushbuttons

for

use

by

ma~

be

listedinTable

performance

the

instrument

testing

the

specifications,

test

equipment

an

GHz. used WIth

Transistor Fix-

microwave

the

panel

front-panel

or

for

perform-

user.

and

Test

Set

for

active

refere?ce

for

closures.

~he

neces-

the

HP

8405A

each

remote

RF

or

be

1-7. OPERATING INFORMATION

SUPPLEMENT

1-8. Packaged with this basic manualisan Opera-

is

ting Information Supplement which the

first three sectionsofthis manual. This supple-

a reprint

of

1-17. OPTIONS

1-18. Figure 3-5isa diagramofthe Option in input

001 and

the

instruments containinganoptionisthat

and

output

Option

002.

The

cables goingtothe

RF

circuits

main difference

switch trees

for the

1-1

General

Information

Model

8746B

have

been

the

10-dB

increase

interchanged.

attenuators

the

signal levelatthe

Option

in

the

002

port

test

1-19. Option 001

1-20.

The signal level than

the

standard

RF

power

HP Model

at

the

into

8746B,

test

port

instrument

the.

test

Option

thatis10

for

set..This allows making large-signal measurementsonpower mixers.

1-21. Option 002

1-22..The signal level than RF

power used parameters This

measurement

return-match

configuration.

the

standard

for

option

HP Model

at

the

into

the

automatic

or

large dynamic-range measurement.

is normally

8746B,

test

port

instrument

test,

set..This

Option

thatis20

for

measurement

limitedtouseinautomatic

systems since source-match

specifications are degraded

1-23. ACCESSORIES SUPPLIED

also removes

couplers

port.

001,

dB higher

the

same level

transistors

002,

dB higher

the

same level

option

of

large-signal

to

has a

of

and

has a

of

is usually

and

in

this

cable furnished will measurements Transistor ware cables paragraph ther

1-25.

Fixture.

measurements

may

need

entitled

information.

EQUIP~ENT

with

enable the

youtomake

8746B

using

the

When making microwave hard-

other

to

be

"Equipment

reference-line coaxial

substituted.

Refer

Available"

REQUIRED BUT NOT

SUPPLIED '

1'~26.

The

Model

ph'ase-amplitude

Model

8410ANetwork

8405A

1-27. EQUIPMENT

ratio

Vector

87

46Bmust

indicator,

Analyzer

Voltmeter.

AVAILABLE

be

such

System

used

as

1-28. Model 11608A Transistor Fixture

1-29.

Transistors are

by

usinganadditional Model Refer operating

11608A

to

the

instructionsonthis

Model

tested

fixture,

Transistor

11608A

with

the

Hewlett-Packard

Fixture

Operating

transistor

Model

(Figure 1-2).

fixture.

1-30. Other .Reference Line Coaxial Cables

transistor

11608A

to

the

for

fur-

with

the

HP

or

the

8746B

Note

for

a

1-24. A rack-mounting No.

8120-1348),

Part

No.

11604-20021),

furnished

with rack-mounting to

adapt

the

in

equipment Instructions included

with

a reference line coaxial cable (HP

the

8746B.

kit

contains

Model

racks

for

8746B

with

conversiontorack

the

kit.

kit,apower

and

a 36-pin

cable (HP

connector

(See Figure 1-1.)

all

the

hardware needed

cabil1et

standard

for

19-inch spacing.

mounting

The

reference line coaxial

Part

are

The

installation

are

1-31.

The

reference line coaxial cable furnished

with

the

8746B teststobe To

make hardware, Part

No.

wave transmission

allows transmission

madeontrap.sistors using

reflection

the

measurements

useofa

shorter

08745-20064)isrecommended.

measurements a longer reference line (HP Unless

the

port

spacingonthe

and

the

on

reference line (HP

require

Part

No.

08746-20031).

device

reflection

11608A.

microwave

Micro-

the

use

under

test

of

is

1-2

Figure

1-2. Model

11608A

Transistor

Fixture

Mountedona

Model

8746B

Model

the a Flexible Arm HP Model

8746B

same asonthe

8746,anadditional

11605A,

sary.

1-32. Model 11605A Flexible

1-33.Ifthe not

the

port

same as

spacingofthe

thatofthe

Arm

device

Model

component,

willbeneces-

under

test

8746B,

a Flexi-

General

ble

Arm,

Hewlett-Packard Model

be

usedonone

the

other 11605A three

is

almost

consistsofthree

swivel-adapters.

any

nectedtothe

port

connectedtothe

coaxial

8746B.

t.J!o.

·of

the

rotary-arms

'rhis

two-port

device

configuration

device to.

11605A,

under

8746B.

connected

Information

should

test

with

The

Model

by

allows

be

con-

Table 1-1. Model

Frequency Directivity:

Source

Return

Reference

Adds 0 to 15 cm (30 cm in transmission path) reference line; calibrated by digital dial indicator. Indicator

Range:

~

Match:

Plane

0.5to12.4 GHz.

30 dB, 0.5to4.0 GHz 26 dB, 4.0to12.4 GHz.

1

p

~

0.13 (~1.3 SWR), standard model only

2

p

~0.13

standard model only.

Extension:

is

adjustable for initial calibration.

(~

1.3 SWR),

..

Connectors:

RF Input: Type N female, stainless steel Test Ports: Reference and Test Channel Outputs:

mates with

Maximum Insertion

Standard Configuration - Nominal 21 dB, Option Option 002 - Nominal 1 dB. RF Input

30 dB.

APC-7

type

APC-7

precision connectors.

PowertoRF

Loss:

RF InputtoTest Port,

001-

to

Input: 2 watts.

Nominal 11 dB,

Reference Channel Output - Nominal

to

8746B

Transistor

Maximum

Configuration:

Specifications

to

Remote Requirements: Switch closure or use a transistor switch. Contactisat shorttocommon will draw 12 rnA. Noise immunity

common,

12 volts and

>2 V peak.

Biasing:

Bias and bias sensing connections are madetothe biasing networks built into the 8746B via the 36-pin rear-panel connector.

Bias:

±100 Vdc, 500 rnA. Maximum currentof1 amp when bias and bias sense circuits are operated in parallel.

Standard: Recommended for small-signal measurements; has the optimum signal-to-noise ratio.

Option 001: Provides test port. Enables large-signal parameter measurements.

Option 002: Provides 30dBhigher power at the test port and 10 Return Match specifications are degraded. Recommended for Automatic Network Analyzer Systems only.

dB

10dBhigher power level at

greater dynamic range. Source and

Remote

Programming:

Selected by closing contact connectortocommon.

S-Parameter Selection: 36-pin rear panel connectortocommon.

Incident Attenuation: 36-pin rear panel connectortocommon.

Rear-panel switch allows manual attenuator opera-

tion when s-parameters are remotely controlled.

of

36-pin rear panel

By

closing 2 contacts

By

closing 3 contacts

of

Table 1-2. Supplementary Operating Characteristics

These values are not specifications but are typical performance characteristics included for informationofthe user.

Frequency

1.5

2.5

Response

dB,

± 7 degrees, 0.5

dB,

± 7 degrees, 2.0to8.0

dB,

± 7 degrees, 8.0to12.4 GHz.

(Amplitude

to

2.0

and

GHz GHz

Phase

Tracking):

Power

Requirements:

115V/230V ±10%,48to

Weight:

Dimensions:

lEquivalent 2Reflection

Incident

Test

Net 35 lbs (16,1 kg).

5th inches high,

deep (140 x 426 x 467 mm).

source

reflection

coefficientofport

Attenuation:

0-70

dB

of

indicated value.

Port

4.810 inches.

in 10dBsteps. Attenuationiswithin

Spacing:

440 Hz, 110VA max.

163~

inches wide,

coefficient.

usedtoterminate

device

183~

under

test.

±5%

1-3

General

Information

Instrument Type

Sweep Oscillator

Table

Frequency: 0.5

Rec.ommended Test Equipment

1-3.

Critical Specifications

12.4 GHz

to

Recommended Model

8690A/B mainframe with

HP

8699B (0.11

HP

8691A/B

HP

8692A/B (2

HP

8693A/B (4

HP

t"0

8694A/B (8

HP

4 GHz)

to

2 GHz)

to

(1

4 GHz) P

to

8 GHz)

to

12.4 GHz) P

to

Model

8746B

Use P,T

;P P

P

1

Network Analyzer

Flexible Arm

Sliding Load

Coaxial Termination

Coaxial Short

Oscilloscope

Voltohmmeter

Power Meter

No substitute may be used

12.4 GHz

Frequency: 0.5

to

Impedance: 50 ohm coaxial SWR

Insertion Loss: Frequency:" 1.8

~1.05

SWR:

Load Frequency: 0.5

~1.01

SWR:

Load Frequency: 0.5

~2.5

12.4 GHz

to

2.0 G

to

12.4 GHz

to

dB

Hz

~1.25

ports:

of

Connector: APC·7 Vertical Sensitivity: 25 mV/crn

Vertical Bandwidth: 500 kHz

Horizontal Sensitivity: 1V/cm

Voltage Range: 300 volts Accuracy:

±5%

Ohmmeter: One range not over 1.5V open circuit;

norover 1 rnA closed circuit for testing transistors.

+10 dBm

Range: ·20 dBm

to

Compatible with Thermistor Mount

8410A/8411A with

HP

8412/3/4A

HP

11605A

HP

905A

HP

909A, Option

HP

11565A

HP

/1801A

w

l80A

HP

412A

HP

432A

HP

HOI

&

1821A

P,T

P

P,T

T,A

T

Thermistor Mount

Recorder

x·y

Remote Operation Tester

Ammeter

DC

Variable Voltage Transformer

1-4

+10 dBm

Range: ·20 dBm

to

Compatible with Power Meter

Input Ranges: 0.1, 1, an4 10V/in.,

continuous vernier between ranges.

Zero Set: zero may be set up to one full·scale

indication inany direction from zero index.

Amphenol 36·pin connector with pin connections

accessible

1 ampere

Range: up Accuracy:

Range: 102

=

P

to ±3%

Vac

127

to

Performance Test; A

NOTE

1

Adjustments;

=

T

478A

HP

7035B

HP

Part No. 08620·60037

HP

428A

HP

General Radio W5MT3A

or Superior Electric

Troubleshooting

=

v

.:

UC1!\1

T

T,A

Model

8746B

Installation

2-1.

INITIAL

INSPECTION

2-2. Mechanical Check

2-3.Ifdamagetothe ask

that

the

carrier's instrumentisinpacked. mechanical material

damage.

for

signsofsevere stress.

shipping

agent

Inspect

Also,

2-4. Electrical Checks

2-5.

The should suitable IV,

.

performance

be

Perf.ormance

electrical

verified

for

incoming

testislistedinTable

performance

on

receipt.Aperformance

inspection

Test.

Equipment

2-6. Claims for Damage

2-7.Ifthe

in

transit, Hewlett-Packard shipping rier's replacement waiting

2-8. sp,ected defects.Ifthereisany cal

performanceisnot

your

Model

carton

inspection.

for

claims

Before

and

Hewlett-Packard

8746Bismechanically

notify

office

and

The

or

repairofyour

settlement

shipment,

found

freeofelectrical

the

carrier

immediately.

packing

HP

office

this

deficiency,orif

within

office.

2-9. PREPARATION FOR'USE

2-10. Power Requirements

cartonisevident,

be

present

the

instrument

check

against

the

cushioning

of

Model

is giveninSection

required

1-3.

and

the

Retain

material

instrument

specification,

will

the

and

for

arrange

carrier.

mechanical

the

SECTION

II

INSTALLATION

d. e.

the

switch

tion.

when

8746B

test

for

damaged

nearest

the

car-

without

was in-

electri-

notify

the

for

the

for

and'the

f. g. Slide h.

2-14. THREE-CONDUCTOR

2-15. Electrical ommends grounded. equipped when grounds 3-prong wire.

2-16. operating put, the

pigtailonthe

2-17. OPERATING ENVIRONMENT

2-18. Model but from0to humidity

Remove With

a~f.screwdriver

arm

with

The

right-hand

left-hand

Replace

clear

Replace

To

protect Manufacturers that

the

All

Hewlett-Packard

witha3-conductor

plugged

the

connectorofthe

To

use a

The

8746Bisroom

it

will

up

into

instrument.

preserve

the

instrument

3-prongto2-prong

normal

operate

+55

degreesC.It

to

95%.

fuse.

or

pointed

the

arrowto115or230

positionisfor

positionisfor fuse

withafuseofcorrect

plastic

power

cable.

230

covertoright.

POWER

operating

instrument

the

adaptertoground.

operating

personnel,

Association

panel

power

an

appropriate The

offset

power

protection

temperature

to

its

cableisthe

froma2-connector

adapter

environment

specified

will

tool,

115

volt

input~

CABLE

the

National

(NEMA)

and

cabinet

instruments

cable

receptacle,

on

ground

feature

and

connect

for

(25.:elegrees

performance

operate

move

posi-

input

value.

rec-

be

are

which,

the

when

out-

the

C),

in

any

2-11.

The 115or230 power.

2-12.

2-13. combination holder, input

Power

115/230

This

and

voltage

a.

Remove

b.

Slide clear plastic

c. Pull

Model

8746B

Vac ±10%,48to

consumption

Volt

Operation

instrument

input-voltage

circuit

outonhandle

has a

of

power-cable proceed

power

requiresapower

400

Hz,

is less

than

power

switch.

cable.

coverofmoduletoleft.

marked

module

receptacle,

as follows:

source

single-phase

110

To

change

"FUSE

VA.

that

is a

fuse

the

PULL".

of

2-19.

The bench make when

instrument

operation.

full-width

stacked.

cabinet

The

plastic

modular

has feet

instruments

2-20. STORAGE AND SHIPMENT

2-21. Packaging 2-22. Original-Type Packaging.

packing factory Packard

line,

ping servicing

materials

are

available

office.

wrapitseparately,

container.Ifthe

and

Remove

repair,

identical

through

attachatag

to

those

your

the

rear-panel

and

includeitin

8746Bisbeing

indicating

plastic

are

Containers

nearest

feet

shaped

self-aligned

used

Hewlett-

reference

the

returned

by

type

for

to

and

the

ship-

for

of

'2-1

Installation

Model

8746B

service

ment

required,

serial "FRAGILE" respondence

instrument

the

number.

serial

return

full

number.

assure careful handling.

to

regarding

its full HP

by

address, A.lso

your

2-23. Other Packing Materials.

instructions

eral

commercially available materials:

with

Remove

a.

separately,

it

wrap

container. plastic. office service

full serial

and

Wrap

(If

center,

or

required,

should

the

shipping

attach

return

number.)

be

rear-panel reference line,

include

and

instrument

a Hewlett-Packard service

to

tag

a

address,

and

mark

instrument,

model

following gen-

The

for

used

in

it

heavy

in

indicating

model

full instru-

box

the

cor-

any

In

refer

number

and

repackaging

shipping

the

paper

type

the

number,

to

or of

b. Use a

carton

wall adequate.

c. Use

4 inch layer)

to

provide

to inside

the

cardboard.

d.

e.

assure

to

strong

made

enough

shipping

of

shock-absorbing

around

cushion

firm

container.

Protect

Seal the·shipping

shipping

the

Mark

careful

handling.

container.

lb.

350

all sides

and

the

container

test

the

of

prevent

control

securely.

A double-

material

instrument

movement

with

panel

"FRAGILE"

is

(3

2-2

Model

8746B

Operation

3-1. INTRODUCTION

The

3-2". S-Parameter Test and

adapters, a signal source, phase-amplitude Model Vector tem

for transistor performed

.quencies, from

the

HP

ments less.

The

below

combination

Set

ratio

8410A

Network

Voltmeter· (see Figure 3-1)

measuring s-parameters

or

device. These

at

single frequencies

0.5

to

Model

are

500

8405A

limitedtosingle frequenciesof1 GHz

Model

8746B

MHz; however, coupling

SECTION OPERATION

of

the

Model 8746B.

with

its accessory fixtures

andacompatible

indicator,

AnalyzerorModel

12.4

Vector

canbeusedatfrequencies

SIGNAL SOURCE

I

SW.EEP OUTPUT

:

VOLTAGE

I

~--------

I I

I

: I

I INPUT:

L - - - - - - - -

such

as

m~ke

of

almost

measurements

or

at

swept

GHz.

When used

Voltmeter,

attenuation

INPUT

FOR

8412A

HORIZ

the

8405A

up

a sys-

can

with

measure-

r----------~

I I

I

I I

:

I

I I

L----r----J

RF

...

REFERENCE

PHASE-AMPLI

RATIO

..

PrH~~~

EXT

I I

~

I I

L J

the 6 graded 001 creases 6

HP

sign3J. stant. below

any

be

fre-

tored ceeded the

pad impedance

or

uring active devices. This possibilityoflow

DC

BIAS

SOURCE

8111A

.BIAS

8146B

TEST

SET

devices

of

S-PARAMffiR

1 1

TUDE

INDICATOR

HP

8405A

HP

8410A/8412AI

8413A/8414A

~~M!l·11TUDE

VERT

OSCILLOSCOPE

01

SPLAY

VERT

** :

III

internal

dB/octave

&

display

at

I

f

I

INPUT

~

------i

TEST

I

directional

and

below

002,

at>6ut

the

dB/octave

level

at

Consequently,

500

MHz

closely. Make sure

when

increasing

indicator.

the

RF

matchatlow

under

test.

r-----

I I

I * I

I

ADAPTER

I I

L J

source

RF

the

reference

the

INPUT

frequency

-,

L-

I

r--

couplers

and

150

MHz.

signalatthe below

when input

making level

power

powertoget

For

Option

connector

frequencies

pad

oscillation

DEVICE

UNDER

TEST

increasesbyabout

return

500

For

match

8746B

TEST

MHz

Options port

when

channeliskept

measurements

should

limits are

be

not

a reading

002,

place a 3-dB

forabetter

when

will

reduce

with

are de-

in-

the

con-

moni-

ex-

on

meas-

the

active

*

Adapter,

**For

suchasHP

swept-frequency

Figure 3-1.

11608A

Transistor

measurements

with

Block

Fixture

for

testing

transistorsorHP

8410Aj8413A.

DiagramofEquipment

Setup

11605A

Flexible

Ann

when

testing

for S-Parameter Measurement

microwave

hardware.

3-1

Operation .

Model 8746B

3-3. PANEL FEATURES

3-4.

Front

and

indicators are described in Figures 3-2

In

these figures

keyed

to

and

rear

panel controls, connectors,

the

numbersonthe

the

description numbers.

3-5. OPERATING PRECAUTIONS

3-6.

Maximum

3-7. Powerinexcessof2

INPUT under the power

3-8.

jack

test

instrument.

limitofthe

RF

PowertoTest Device

or

into

RF Power

returned

PORT'l

Also,

associated

watts,

from

or

PORT2may

do

not

network

CAUTION

Do

NOT use excessive

the

device cause collector power,

under

the

transistor

current

investigate

RF

test.

Too

to

oscillate.

varies

the

possibilityofoscil-

lation.

On

3-9. device internal

channel

all models

under

step-attenuator

output.

test

When

of

may

the

8746B,

be

decreased using

without

standard step-attenuatorissettozero, under level and mately attenuatorissettozero,

te~t

, level.

to same levelasthe and

,

at s-parameter configurations are

The

test

is approximately 21

poweratthe

31

is approximately

For

zero,

powertothe

002,

with

constant,

powertothe

dB

down.

Option

the

reference channel is approxi-

For

11

002,

RF

input.

poweratthe

approximately 6 dB/octave

circuits

for

the

same circuits

standard

for

Option

powertothe

dB below

when

device

For

device

model

showninFigure 3-4.

Options

shown in Figure 3-5.

3-10. MaximUITI DConRF Lines

3-11. DC voltages transmission lines in exceed ±

100

volts as

on

the

inner

the

Model

the

insulationofthe capacitors may break down. Do than

0.5

amponeither BiasorBias Sense leads.

and

illustration are

either

into

the

an active device

damage

exceed

the

analyzer.

input

much

with

power

RF

may

If

input

to

the

powertothe

reducing reference

8746B

powertothe

dB

below

001,

internal

device

RF

when

device

the

RF

the

attenuatorisset

under

below

testisat

both

Options 001

reference

test

500

8746B

001

and

port

increases

MHz.

in all

002

conductorofthe

8746B

must

internal

not

draw

3-3.

RF

input

the

input

the

under

input

the

held

RF

are

not

more

if

the

properly tion

trace are less

pushbuttons

not

calibrate properly, refer

amplitude variations in

function normally.Ifthe8746B will

than

2.5dBl to

the

calibra-

and

the

8746B

Section VIII, Ser-

vice.

3-14. OPERATING INSTRUCTIONS

General Measurement Description

3-15.

3-16. The Model

be

.usedtomake

binations

of

fied block diagram

Figure 3-1.

tude

ratio indicator, suchasthe

HP

8410A/8411A external oscilloscope, tions

for

using Figures 3-9 modified for use the

Operating and adapting operation tested sistor transistor nents also the

at

by

connecting

Fixture

under

maybetestedinthe

physical limits exceeded. Consult office. Microwave hardware the

S-Parameter Test

Model

3-17.

11605A

The

following general

steps necessary when making measurements

8746B

measurements

S-Parameter

with

Test

Set

several com-

complementary equipment. A simpli-

ofatest

The'

display indicator is a .phase-magni-

with

or

the

8410A

and

3-10. These instructions

with

the

and

Service Manual

the

instructions for single-frequency

setupisshown

HP

8405Aorthe

8412A,

8414A

8413A

plug-in. Instruc-

system are given

8405A

by for

with

can

referring

the

8405A

lower frequencies. Transistors are

the

HP Model

to

the

8746B

testinthe

of

the

nearest Hewlett-Packard

Setbyaccessories,

11608A.

the

may

~1608A

and.

inserting

Other

11608A,

11608A

be

connected

Tran-

compo-

providing

are

suchasthe

Flexible Arm. .

outline

explains

may

in

an

in

be

to

the

not

to

the

with

any combinationofequipment. These instructions

the

same

for

both

the

are and 002 models

a.

If

swept-frequency phase measurements

are

to

be made,

line-lengths

must

of

the

be

standard and

8746B.

reference and

equaL

The

reference channel is adjusted

REFERENCE PLANE EXTENSION length cable can

of

the

on

the

be

removed and

REFERENCE LINE coaxial

rear paneL The REFERENCE LINE

other

length reference lines

(see Figure 3-6) can be installed equalize To best utilize

SION range, install

ENCE LINE coaxial

the

test

and reference channel line lengths.

the

REFERENCE PLANE EXTEN-

oneofthe

patch

following

cables:

Option

I

test

channel

length

by

varying

and

to

approximately

REFER-

of

patch

001

the the

the

TRANSISTOR FIXTURE (11608A): Use HP Part

No. 11604-20021 included with 8746B.

3-12. OPERATOR'S CHECK

3-13.

To

check calibrate the

the

calibration trace. The

the

system

8746B for

a measurement. Observe

3-2

operation,

8746B

set

is

operating

up

to

INotchesof1dBat

causedbyresonancesofRF

approximately

700

chokesinthe

MHz

bias

are

input

normal.

leads.

They

are

Model

8746B

Operation

MICROWAVE HARDWARE:

Reflection: Transmission

nated

in

Use HP

with

an

HP

Part

No.

Device

11605A:

08745-20064.

Under

Test

Use HP

08746-20031.

Note

When using the

measurement mismatch. tor

(see Figure3-10)toreduce

the

Use a

11605A

the

accuracy

maybedegraded

10

dB isolating

mismatch.

CALIBRATION

b.

Calibrate

.

urement or wave short

by

through-line calibrator. When measuring micro-

hardware,

connected

measurements

ofa11605A

ing for

transmission measurements.

1..

Balance ence REFERENCE obtain quency

.

the

system

terminat~ng

calibrate

to

the

or

a through-line

connected

the

electrical

and

test

for

the

11608A

the

8746B

test

between

channels PLANE

the

least phase change

indication

on

s-parameter

with

port

for

calibrator

the

lengthofthe

by

adjusting

EXTENSION

the

display indica-

tor.!

2.

Adjust tor to Table

for

the

3-1.

the

controls

a display

calibrator

on

the

display indica-

indication

corresponding

being used as shown

Table 3-1. Calibrator Display Indications

S-Para

meter

S11,S22

S21,S12

Calibrator

Short

Thru-line

Magnitude

.

1.0

MEASUREMENT

c.

Remove under biased for

under by scribed

1RefertoHP

test.Ifa

properly.

transistor-biasing instructions.

d.

Measure

test.

compensating

in

from

Application

with

any

other

urements free concerning

calibrator

and

connect

transistoristobetested,itmust

Refer

the

Additional

for

Application

the Hewlett-Packard

Note

Model

8410A

instrumentsinthe

to

parameter

accuracy

the

directivity

Note

117-2

"Stri.pline

Network

office,

measurement

paragraph 3-18

of

may

117-1,

Component

Analyzer",

for

operating

Termi-

Part

No.

of

due

to

attenua-

meas-

withashort

a coaxial

reflection

consist-

test

ports

refer-

the

with

fre-

Phase

0

180

0

the

device

the

device

be

obtained

error

as de-

"Microwave

Meas-

obtainable

instructions

system.

to

in

be

Network general cation 8746B

Detailed urement ware are

3-18. Transistor

3-19. A either byadual necting given simplified internal-bias 3-8. Before should

and of

the

test and point

output

the is

used

Analyzer

Network

Note

117-2,

Applications."

Analyzer

mentioned

applications.

procedures with

and

Adjustments

.

transistor

a HP

and

in

the

shown

Model

dc-power

adjusting

for

both

either

transistorsormicrowave

in

Figures 3-9

Bias

Supply

under

871

test

7A Transistor Bias

supply.

these

following paragraphs.

circuitisshowninFigure

be

performed:

a.

Determine

currents

transistor

b.

Draw fixture. output

between

c.

Determine

circuit

d.

If

connecting

for

both

under

simplified

Label

circuit

the

(bias) voltages.

a Model

any

maximum

the

input

test.

circuit

input

circuit

"port2circuit".

two

circuits is chassis

the

polaritiesofthe

8717

A is used

following paragraph.Ifa

for

bias,

refertoparagraph

This

techniques

earlier, gives specific

calibration

Connection

may

Instructions

power

bias

the

following steps

allowable voltages

and

of

"port1circuit"

for

dual

dc-power

3-21.

CAUTION

AVOID BIAS SUPPLY SWITCHING TRANSIENTS down fore tions. control

bias-supply voltagesorcurrents

switching bias-supply

Also,

and conditions the

bias supplies are merely transients tors.

If

grammed,

current

age

3-20.

Model

program

or

current

Bias

Using theHPModel 8717

871

7A, bias are selected switches. A cable, furnished connects

the REMOTE INPUT available

the

DURING

TESTING!

meter

turn

then

rather

supply

may

the

down

bringituptooperating

output

damage sensitive transis-

power

the

than

merely

switched

supplies

off

input

and

on,

include a zero-voltageorzero-

step

between

setting.

and

bias-sensing

by

means

of

8717Afront-panel

with

8717Ato

connector.

necessary

the

8736B

If

connections

note

while Appli-

and and

be

biased

Supply

for

supplies are

An

8746B

output

circuits

transistor

The

common

ground

input

bias,

refer

supply

Turn

be-

func-

circuit

switching-

on.

switching

are

pro-

each volt-

A.

On

the

connections

the

871

rear-panel

no

cable is

are given

gives

meas-

hard-

3-10.

by

or

con-

in

. and

to

If

HP

7A,

in

3~3

Operation

FRONT PANEL

Model

8746B

o

REFERENCE

controls internal line-stretcher distance from output. Used to equalize test and reference channel signal path lengths for phase calibration. Permits moving reference plane

ZERO thumbwheel

on

cation serted line length Counter indicates up moves 30 cm. Counter reference plane directlyincentimeters for reflection measurement.

•

S-PARAMETER

be

measured. Pushbutton glows, indicating s-parameter being measured. To protect device under test, S-PARAMETER resets to 822 when first turned on manual operation. This occurs whenever instrument turned on, either manually or by a power resumption.

PLANE

RF

counter without changing line length. In-

pushbuttons.

EXTENSION

INPUTtoREFERENCE channel

by

15 cm.

is

used for setting reference indi-

is

twice

~he

reading in centimeters.

to

15 cm while the line stretcher

i~dicates

Select s-parameter to

(CM).

to

vary electrical

relative position

Crank

of

•

INCIDENT

test channel power level steps. Power in reference channel protect device under test INCIDENT ATTENUATION resets

operation. This occurs whenever instrument

on, either manually

e

LINE.

indicator.

o

PORT1and

tions to· device under testorto a test fixture.

typel50-ohm precision 7 mm sexless connector.

ATTENUATION

to

70 dB when first turnedonin manual

orbya power resumption.

Combination line power switch and power on

PORT2test

pushbuttons.

device under test in10dB

is

not

ports.

MakesRFcQI)nec-

Selects

affected. To

is

turned

APC-7

CAUTION

Support weightofdevice under test. Do apply extra weighttotest .fixture.

1

in

is

AmphenolRFDivision,. for

important

nectors.

information

Danbury,.Conn.

about

use

and

See careofAPC-7

not

paragraph

3-31 con-

3-4

Figure 3-2.

Front

Panel Features

Model

8746B

Operation

'.

•

REFERENCE

o

outputs

APC-7 The REFERENCE channel connector floating Frequency Converter

REFERENCE

•

section

the REFERENCE PLANE EXTENSION to any sired length.

Power

•

connected to 8746B cabinet. Power requirements:

or

115 maximum.

Power

e

connector, fuseholder, a fuse-removal handle, and a 115-230 volt input-voltage switch. Number opposite ac input-voltage slider

and

phase-amplitude ratio in<llcator. These are

to

50-ohm·precision 7-mm hybrid connectors.

assure alignment with 8411A Harmonic

to

LINE.

rigid coaxial cable to extend the range of

of

Conne~tor.

Cable

Vac

230

Module

8410A Network Analyzer.

of

be replaced with a longer

May

NEMA

±10%, 48 to 440 Hz, 110

Assembly.

Contains

correct line· fuse rating.

gives

type

ac

mechanically

is

with

Reference and Test channel

TEST.

REAR

de-

offset

VA

power cable

PANEL

Accepts contact-closure type

select s-parameter

open

the

to

12 Vde. Maximum current from

is

Maximum bias current 500

Complete serial number in-

Plate.

8746B.

RF

for

MIN.

0.316 MAX.

0.320

of

short-circuited

that

signal

2 watts. Connector

is

signal

applied

is

Number

INPUT.

,------

INPUT.

is

100Vdc.

Input

REMOTE

.0

mote programming ured and incident attenuation under test. Nominal voltage from the 8746B when the contact

the 8746B when contact Also accepts dc bias for device under test. Maximum bias voltage

Serial

cluding prefix should be included in any correspond-

•

ence concerning

RF

•

device under test. Frequency range GHz. Maximum power level

50-ohm type N and mates compatibly with type connectors whose dimensions conform C-39012 and MIL-C-71. (See dimension drawing below.)

to

is

0.5

re-

be meas-

device

rnA.

12

rnA.

the

to

12.4

to

MIL-

to

is

N

IVIANUAL-REMOTE

o

INCIDENT ATTENUATION pushbuttons only.

MANUAL

in

When only by front-panel pushbuttons.

position, attenuation selection only if remote operation tact closure.

Switch.

position, attenuation

Controls operation of

in REMOTE

When by contact closure

is

also programmed by con-

is

Figure

selected

is

3-3.

Panel Features

Rear

3-5

Operation

8

11

Model 8746B

RF

INPUT

RF

INPUT~""'--

.....

~~r=---

.....

,--I

'.

T'

I I I

I IL

:

I 1 I

I

~(

I

J..!

L

__

---1

r

--l

10

dB

__

OUTPUT

!

10

dB

L

__

(.

I)

PORTl

-.J

TEST

CHAN

-

"I

~PORT2

C I

~

RF

INPUT~""--""'~~F-~""

3-6

I-~'

I

~(

I<j>

: 6

I I

I

wl

L

__

---1

RF

INPUT------

r-

--l

<:.

I)PORTI

IL--~

OUTPUT

I

Figure 3-4. Standard Model

TEST

CHAN

RF

...........

Circuits

~=----

•

Model

8"

RF

INPUT

8746B

Operation

RF

INPUT

r - E

r:

- -

-,

I10dB

IT

I I

,.

I

IX

I

Ii

L

IL_.-:._J

I

---<:~

.....~__

I

~l--I:....-_-

"I

__

-l

~d;-

L

~l~PORT

...

TEST

CHAN

~

~rl

( I)

--.J

PORT

1

2

INPUT~'

NOTE

No10dB in

port

in

the

002.

RF

~-_

pad

couplers

....

-----*:--

---0""

__

--"

I.-~I

,10

dB

(

L

__

-.J

...

I)

TEST

CHAN

PORT

2

1:---'

I~:

I r I

I I

I

11

L

I

__

1--'

--!

Figure 3-5. Option 001 and

I - (

:

lOdB

L

___

\10

dB

L

__

3

(

-:

~

J )

J

-.-.J

I

I)

PORT

TEST

CHAN

PORT

1

1:---'

I~:

I r I

I I

I

I I

11

L

__

2

.

002

RF

Circuits

I -

("

-l

)

PORT

1

IlodB

L

___

I

J

3

TEST

- I

~

CHAN

I)

PORT

-l

2

3-7

I

0

;-

.J

0d

(

L

__

._d'

Operation

Table 3-2. Operating concerning operation panel switchesonthe transistor transistor

If

and

to

under

the

8717A

Service .Manual

of

the

871 7Atocorrespondtothe

be

tested.

test, perform

is

used, refer

871 7A. Set

To

apply bias

the

following:

for

full details

CAUTION

These instructions are

or

transistors (PNP

NPN). Some transistors may be damaged bias in this order, while this is order

for

other

FET's.

applying bias depends

upon

for

The

by

the

bipolar

applying

order

type FET. Therefore, always .read manufacturer's biasing instructions before testing transistors. your

procedure

Good

on

practice istotry

a similar,

inexpensive transistor, first.

a. Make Bias and Bias Sense connections

from interconnect

8746B

to

8717A

cableisnot

output.

availabl~,

If

the

makeupa cable

to

the

to

FET

proper

of

the

but

8717A

its

front

the

using Normally circuit Direction

the

and

connector

port

1 circuit is used

port

2

of

RF

signal flow depends

furnished

for

the

with

for

output-bias circuit.

parameter measured.

b.

Set

8717

A voltage METER FUNCTION

switch AMPL

turn

0.1to0.3 volts

to

VcE

control

c. With

8717

Aon.

d.

Adjust

-D

s position and adjust VeE

full·y counterclockwise.

no

transistororcalibrator installed,

8717

AVe

E

-0

l

.

S AMPL

CAUTION

If

CCE

-0

S is set below 0.1 V,

base-collector

junction

may

forward-biased and draw excessive reverse

current. This under

IIf

difficultyisfound

nearest

Hewlett-Packard

test.

may

when

office

damage

. .

setting

for

0.1to0.3

further

the

information.

Model

the

input-bias

upon

control

become

transistor

volts,

contact

8746B

8746B.

the

-0

to

your

S

Used

for mission Flexible

HP

Part

Used HP

Part

microwave

measurements

Arm. No.

08746-20031

with

11608A

No.

11604·20021

hardware

with

Transistor

trans-

11605A

Fixture.

Used

for

tion

measurements

front

panel.

HP

Part

microwave

No.

08745-20064

hardware

referencedtothe

reflec-

3-8

Figure 3-6.

Reference

Line Coaxial Patch Cables

Model 8746B

e.

Turn

the

8717A

f.

Set

8717AIE-8AMPL/RANGE

fully counterclockwise.

Set

IE

-8

g.

to

5,

50,

transistor

or

under

LIMIT(MA) current-limit switch

500

test.

bias. off.

rnA position

to

control

protect

the

m. Turn

terclockwise.

n.

Turn

0.3 volts.

o.

Turn BIAS off.

the

IE-8AMPL

VeE

AMPL

control

Operation

fully coun-

downto0.1

to

h.

Place 11608A output

leadtothe

i.

Hold

striplinebyclosing

j.

Turn to

desired

Set

k.

to

monitor

the

with

the

right.

the

BIAS on. Adjust

output

voltage.

current

-

I

and

E

8

transistor

input

transistor in

the

11608A

under

leadtothe

contact

lid.

VeE

'METER FUNCTION switch

adjust I

-

E

8

controltodesired collector current.

1.

instructed

If

biasisnot

BIAS switch

Make

in Figure 3-9.

transistor

CAUTION

turned

to

off, transients may

measurements as

down

befor~

damage sensitive transistors.

test

in

the

left

and

the

with

the

AMPL control

AMPL/RANGE

pushing

3-21. Bias Using a Dual

sistors may also

be supply. Additional circuitry sistor

under

test

maybeneeded.

may

take

the

formofdiodes emitter the will vary with

3-22. with connected voltage and

and/or

a series current-limiting resistor

emitterorbase lead.

the

transistor used.

Note

that

the

either

to

is

normally

the

either

input

Bias Sense terminals

voltage connected

DC

Power Supply. Tran-

biased using a

to

between

The

particular circuit used

bias supplies canbeconnected

or

output

port

terminal.

connected

to

and

to

port

2 Bias terminals (see Figure 3-8). This also make flow Transistor or

any

be

shorted readily,

from

other

the

normal

the

Fixture

left

(forward-gain) signal (S21)

to

is used. When using

application where

the

right

bias

when

the

current-limited.

dual

dc-power

protect

Protection

the

circuits

base

circuit voltage

The

input

the

port

1 Bias

the

output

and

circuit

Bias Sense

convention

the

11608A

the

11608A,

bias

supply

supply should

tran-

and

in

bias

will

can

be

Table

3-2~

Remote

Input

Connector Pin Functions

Pin Number

1

2

3

6 15 16

17 18 19

20 21

Chassis Ground Port

2 Bias (connecttooutput

Port

1 Bias (connecttoinput

Remote Remote Remote

S-

Parameter Select("1" Attenuation Attenuation

Remote Operation Enabling (short Common Logic

Ground

Chassis Ground Port

2 Bias Sense

Port

1 Bias Sense

24 Re,mote S-Parameter Select 33 Remote

Attenuation

36 Common Logic Ground

All Others No connection

Function

Select Select (40 dB

(output

(input

circuit bias sensing)

Select

circuit bias)

bit)

(10

dB bit)

bit)

to

pin18or

circuit bias sensing)

("2"

bit)

(20dBbit)

·:v

36)

3-9

Operation

If

a greater current-carrying leadisneeded, leads. However, graded. See

the

parallel

remote

following

CAUTION

If

the

Bias Sense leadisusedtocarry

rent,

-

its bias-sensing graded rent

flow.

by

the

voltage

capacity

the

Bias

bias-sensing

caution.

function

drop

duetothe

on

and

may

will

the

Bias

Bias Sense

be

de-

cur-

be

de-

cur-

3-26. Remote S-Parameter Selection.

mote

mode means s-parameter as

Table 3-3.

of

the

pins 6

shown

s-parameter selection is

and

24.

Connect

for

in Table 3-3.

Remote

S-Parameter Selection

Truth Table

Model

In

made

the

8746B

the

re-

by

desired

3-23.

Adjust

a.

put

and

Connect

the

Set

turn

power

both

the

power

supply

supply as follows:

power

suppliestozero volts

on.

to

the

CAUTION

Limit Sense lead out

b. 11608A output

c. Hold striplinebyclosing

d. circuit (drain-source) voltage. used,

drop remote

e. Adjust

nectedtothe

tor

(drain)

in

stepd.When operating

the

transistor supply tain

the

current

the

1/2

Place

with

the

leadtothe

the

Set

the

to

obtain

to amp

on

0.5 amp: fuse in

transistor

input

right.

transistor in

the

11608A

supply

the

If

set

supplytodesired voltage

across

the

sensing

stabilizing resistor.

with

a stabilizing resistor.)

the

voltage

input

circuit

currentisobtained.

overanextended

may

havetobe readjusted slightlytomain-

desired collector (drain)

each

Bias

and

to

avoid

burning

the

leads.

to

be

tested

leadtothe

left

contact

lid.

connected

to

desired collector-emitter

a stabilizing resistor

plus

(Do

from

the

supply con-

until

the

desired collec-

Recheck

with

power

periodoftime,

cu~rent.

f. Make Transistor Measurements as in-

structed

in Figure 3-9.

3-24. REMOTE OPERATION

8746B.

Bias

in

and

with

the

output

the

voltage

NOT use

voltage

-applied

out-

the

set

to

this

Para

meter

to

be

Measured

8

11

8

12

8

21

8

22

NOTE:

Pin17mustbeshortedtocommon select

is

Selecting

remote s-parameter select pins 6 s-parameter

push

3-27. Remote Attenuation Selection.

UAL-REMOTE INCIDENT ATTENUATION When in MANUAL position, is selected whether is position, panel common connector

pin17ofJ6REMOTE INPUT

shorted

to

incident

push

buttons

or

onlyifpin 17 is

Pin18or36to:

24

remote

Open

Closed

operation.

operation

6

Open

Closed

Open

and

24,

Pushbutton

(18or36)

enables

and

disables

buttons.

The

switch

controls

operation

pushbuttons

by

front-panel

common

or

incident

pushbutton

not.

When in REMOTE

attenuation

attenuationisselectedbyfront-

if

17isnot

by

contact

closures

on

shortedtocommon.

Lit

8

11

8

12

8

21

8

22

to

remote

MAN-

only.

only,

connector

shorted the

36-pin

the

of

to

3-25.

The

36-pin connector, REMOTE INPUT, used for biasing, also provides selectionofmanual/remote selection, and incident To

use

the

8746B MOTE INPUT) mon

(pins18or

remotely, pin

jack

must

36).

operation,

attenuation

be

3-10

contacts

for

s-parameter

(see Table 3-2).

17ofJ6

shortedtothe

remote

(RE-

com-

3-28. Remote Operation Requirements

3-29.

The when flows remote peak.

8746B

remote

when

control

supplies

circuitisopen

the

contact

lines should

approximately

and12rnAofcurrent

is closed. Noise

not

exceed 2 volts

+12 Vdc

on

the

Model

8746B

Operation

Attenuation

o

dB

10

dB

20

dB

30

dB

40

dB

50

dB

60

dB

70

dB

Note:

"10dBbit" "20dBbit"

Pin17mustbeshortedtocommon ATTENUATION

3-30. OPERATOR'S 3-31.

CareofAPC-7 Connectors

3-32.

RF

connections under are nectors. These

test,

made

andtophase-amplitude

with

APC-7

connectors

particular care since

connectorsisobtained

the

inner"

and

outer

conductors. electrical performance dependent

upon

the

surfaces.

3-33. p.andling

~ven

nector inner beyond

Important

and

in Figure 3-11.

that.ismost

conductor

the

planeofelectrical

actionofone

the

age

The

by port

contact

riskofthis kindofdamage

always having

connectors

3-34. Replacement available 1250-0907), Danbury,

from

and

Conn. (Part No.

recommendations

care

of

contact.

connector

enoughtocause a

the

fully

extended.

inner-conductor

Hewlett-Packard

from

Table 3-4.

15

Open Closed Open Closed Open Closed Open Closed

remotely.

Remote

(18or36)

MAINTENANCE

to

and

from

type

50-ohm, 7-mm con-

ratio

the

indicator

shouldbehandled

continuity

by

end-to-end

through

contact

Consequently,

of

the

condition

connector

of

is largely

these exposed

about

the

APC-7 connectors are

The

part

of

an

input

likely

to

be

damaged is

Sinceitprotrudes

across

contact,

the

other

any

can dam-

discontinuity.

canbeminimized

coupling sleevesonthe

contacts

(Part No.

Amphenol

RF

Division,

131-129).

Attenuation Selection Truth Table

Pin18or36to:

"40

dB

and

device

33

Open Open Closed Closed Open Open Closed Closed

REMOTE-MANUAL

d.

Do

e.

Do

3-36. Becauseofthe

16

Open Open

£Jf..

Open Open

Closed Closed Closed Closed

switchinREMOTEtoselect

not

attempttorepair

not

re-use contacts.

removal should NOT hand

tools.

Only

the

with

APC-7

of

the

ing, .hypodermic-action,

(Part

Number

tool

exertsnoappreciable inward pressure twisting force for removing

5060-0236)1

on

the

contacts

3-37. No tools are

ment

the

con-

the

slightly

wiping

input

contact.

applying

r

into

place. inspecting segments. Also, applying light inward pressure against the

contact released to and

3-38. port

the

move

shouldbereplaced.

The

couplers includes

Insert

only

enough inward pressuretosnap

Then

check

the

contact

test

with a pencil eraser. As

contact's

outward.Ifnot,

coupling mechanismofthe

two-piece coupling sleeve assembly

are

ure 3-11. the

3-39.

Bothofthese parts canbereplaced using

proceduresinSection VIII, Service.

Fuses

bit"

Pushbutton

o

dB

10

dB

20

dB

30

dB

40

dB

50

dB

60

dB

70

dB

INCIDENT

Lit

contacts.

above considerations,

be

attempted

with

contact

ordinary

Hewlett-Packard self-position-

contact

should

extractor

be

used. This

and

inner

conductor.

are supplied

required

the

contact

for

proper

to

Instructions

with

the

install a replace-

gently

by

installation

for even spacingofits four

for

normal

spring

the

action

contact

spring

the

sl)'Ould

action

the

end

pressure is

cause

is defective

front-panel

the

coupling

nut

and

showninFig-

tool

no

tool.

hand,

it

by

of

it

the

3-35. Observe placing

a. b.

an

Do Do

inner

not

suretothe

c.

Do

not

conductor.

the

following precautions

conductor

disassemble

apply

inner

a.pply

contact.:

the

more

than

conductor.

any

twisting forcetothe

when

connector.

slight inward pres-

re-

inner

3-40.

AC

Line

Fuse.

is

providedbyfuse

uleatthe

rear panelofthe

F1

fuse proceed as follows:

1. Remove

the

power

module.

part

1

of

APC-7

Connector

Tool

Protection

located in

.for

the

instrument.Tochange a

cord

from

Kit,HP11591A.

instrument

power mod-

the

power

3-11

Operation

Model 8746B

2. Slide

3. Remove

4. Replace

3-41.

Bias Sense lead a follows:

0.5

Bias

amp

1.

2. Remove

3.

4.

the

clear plastic cover all

the

left.

the

handletothe

the

value:

115V:

Number

230V:

Number

Tum

Trace the

Remove fuse fuse (HP

1 ampere standard-blow, HP

2110-0001

1

ampere standard-blow, HP

12

2110-0012

and

Bias

for

fuse.

To

off

the the

the

wires

fuse block.

Part

fuse

by

pulling

right

and

just

fuse

with

a fuseofthe

Sense Fuses. Each Bias

each

port

coupler

replace these fuses

bias supplies.

front

top

coverofthe

from

coupler

and

replace

No.

2110-0012).

witha1/2

3-42. Line Switch Bulb Replacement

3-43. button Model unscrewing the

·pushbutton ploded

The

indicates

8746B.

bulb,

bulb

This

the

disconnect

straight

view

of

housedinthe

that

line

bulb

switch retaining ring.

the

out.

the

pushbutton/bulb

LINE switch push-

power

may be replaced

power

Figure 3-7. is an ex-

is appliedtothe

cord

the

way

up

on

below

the

proper

is fused

proceed

8746B

involved

without

To

replace

and

pull

assembl~T.

to

the

fuse.

Part Part

and

with

to

amp

the

as

..

OFF-ON INDICATOR LINE

Figure 3-7.

Remove the· the

fingernails pulling while nQl<1illgthe· No.

forareplacement (chassis)inthe: TableofReplaceable VI. Install a into

the

pushbutto pushbutton body. seats.

Push

Line

bulb

by. grasping

or

a pair

replacement

•·

assembly

the.

Il

pushbutton

A)

GUIDE

Switch Bulb

of pushbutton.

bulb

bulbbyinserting

:Then insert into..the

~

LAMP

FOR

(2140-0244)

the

long-nosed pliers

is listed

slotinthe

assembly

51

Replacement

bulb

skirt';:

The

under

P~ts,

the

keyinthe

in

3-44. Pushbutton Switch Bulb Replacement

3-45.

Instructions

the

light switches

s-parameter

are

giveninFigure 3-12.

for

and

replacing

attenuation

the

bulbs

pushbutton

with

and

HP

Part DS1

Section

bulb

switch

until

.which

it

3-12

1,19

BIAS

SENSE

BIAS

REFERENCE

!

LI

NE

r--,

I I

~

I

~

RF

IN,"

J6

-::-

>:

20

2

~

2 I

2

~

l

BIAS

I -

I

I "

I . +

I

I '="

GROUND

1I2A

lI2A

O=<lr

'="

5000

0=0

L

SOOO

pF

_.J

pF

1

LINE

STRETc.HER

tj+

.,.

I - l

L:

1~B-.J

. . I

~

-

~

I

~

I

Q I I

I 0 I I i i

INPUT

COUPLER

~

1M

1

+ 2

-1

-r

IJF

2

IJF

+1

LM

_I 2

+ T 2

\.IF \.IF

'"

I

~

L-J

SWITCHES

IN

S22

POSITION

I I I I

I I

I

~

L

- I

SHOWN

Ih

I

..

.-J

~

0 :

n

: I

'-I

,Q

~.

I

~O

pF

°1=

"="

F

s=

~~~

-=

r-"l

I(

,

,I

~

I

1''1

, (

PORT

2

8..

~

m

~

jREMOTEl

L!~~-l

BI

SENSE

BI

I

: I :

:

I

AS

21'

1I2A

II

I

I I

AS

3 I

112

A

1

~

SOOO

"="

SOOO

0:-0

1

-=

pF

-=

1+

1M

"="

1+

1M

I,

(I

~~('

-I~

2IJF 2IJF

+~

1

\"

2

IJF

-1

+T

2IJF

Figure 3-8. Bias Voltage Input Connections

5000

O=<r

-=

pF

I.

'I

If)

i

(PORT1

TO

TEST

OUT

~

0

::i

.:::1'

Operation

-

_.lI

o

OG2)

SWEEP

:

~

•

••

10

OSCILLATOR

:

Q

•

....

000

-

::: :

~

•

.-

0

RF

~l

OUT

-

TRANSISTOR

SWEEP

""""'il

MEASUREM

REFERENCE

r

ENT

HP

c:.

@t=Je

e·~

-

NETWORK

8410A

e

Model

ANALYZER

HP

8414A

leo

O~

-

8746B

HP

*~n~[

..

8746B

"OUllJ'w'

REMOTE

..

::

~

toJ

HP

11608A

TRANSISTOR

FIXTURE

HP

84IIA

II

SUPPLY

.

OUTPUT

-I'

WJI

8717A

TRANSISTOR

BIAS

SUPPLY

WI

3-14

*Rear-panel

REFERENCE

LINE

(HP

Part

No.

11604-20021).

Figure 3-9. Transistor Measurement(1of

See

Paragraph

2)

3-17a.

•

Model

8746B

Calibration:

1.

Connect

page calibrator for reflection through-line calibrator

measurements (see Table 3-1 sponding display indications).

2. Select s-parameter dent appropriate 8746B

3.

Set quency

4. Adjust

Analyzer controlstophase Analyzer over

5. Adjust NEL controls display

a.

b.

equipment

..

TURN

power

the

Sweep Oscillatortosweep

bandofinterest.

the

GAIN

for

unit:

For

8414A transmission coefficient graticule circle).

For

8412A

tude

reference (preferably 0 dB).

as

shown

BIAS

attenuation

Sweep Oscillator

the

Network

and

an

adjust

OFF!

for

to

be

measured

desired

pushbuttons~

frequency

Analyzer

AMPLITUDE

amplitude

adjust

for a

foraconvenient

TRANSISTOR MEASUREMENT

on

measurement

lock

reference

of

shorting

transmission

for

the

and

by

pushing

the

and

Network

the

Network

band

selected.

TEST

CHAN-

VERNIER

on

reflection

1.0

or

corre-

inci-

fre-

8.

the

or

(outer

ampli-

Two transistor calibrators are used for calibration: a through-lihe through-line calibrator to rectly,asthe sion calibration reference plane way to offsetting calibration valueisgiven Table 2ofthe

Note.

For line calibrator. Move edgeofthe

ENCE PLANE EXTENSION counterclockwise the

amountofthe The Table 2ofthe This value length. When using reference channel length is

ENCE PLANE EXTENSION

tion.

be

changed

length.

Operation

short

for

reflection,

for

transmission.

does

not

the

edge

of

the

transistor

short

does.

The

between

the

transmission calibration insert through-

offsetting calibration value is given

Therefore,

the

two

ports.

edge

of

the

transistor case, an

Model

transistor casebyturning

off-setting calibration value.

Model

is

the

by

one-half

11608A

the

reference planetothe

11608A

calibrator overall electrical

the

counter

Operating Note.

8746B,

twice

counter

indication should

the

calibrator overall

and

The

calibrate

case di-

transmis-

is half-

To calibrate

in

Operating

REFER-

the

change

the

REFER-

indica-

a

in

6.

Adjust EXTENSIONtoobtain test

a.

b.

7. Adjust Network Analyzer PHASE control:

a.

b.

8746B

channel electrical lengths:

For

8414A

ter. . . For

8412A

trace. .

For

8414A (short grees).

For ence. (When calibrating DEGREES Always making a measurement.)

180

8412A

REFERENCE

equal reference and

adjust

degrees, through-section 0 de-

return

adjust

control

for

dotorsmallest clus-

for

t;l

horizontal

for

calibrator reference

for

a convenient refer-

withashort,

to

180

to

0 degrees before

Figure 3-9. Transistor Measurement (2

PLANE

phase

VERNIER

set

degrees.

Measurement:

1.

Remove Fixture lead pointingtothe

ALWAYS TURN BIAS OPENING ting precautions in paragraph 3-5 avoid switching transients as described in

paragraph 3-19.

2. Adjust 3-18

installation and operation.

3. Read magnitude and phase from

the

calibrator

and install transistor with

CAUTION

11608A

the

transistor bias. See paragraph

for

instructions concerning bias-supply

play indicator.

of

2)

from

the

right

..

OFF

LID. Observe opera-

BEFORE

·Transistor output

and

the

dis-

3-15

Operation

SWEEP

~ ~

• •

o@

(»

Hll-.1Il

OSCI

••

0

Q

....

(')

0 0

LLATOR

MICROWAVE HARDWARE M.EASUREMENT

HP

SWEEP

1------------------111

RF

OUT

HP

87468

REFERENCE

~

I I

@c:::;).

~----__+It_*).~

HP

84IIA

NETWORK

8410A

ANALYZER

• •

Model

HP

8414A

0 ·

,:1

8746B

REFLECTION

Calibration:

1.

Connect flection HP short

2. Press S11

3.

ation Set

/'

quency

Adjust

4. Analyzer

Analyzer over Adjust

5.

NEL controls display

a.

b.

6.

Adjust

TENSION

channel electrical lengths:

REFlECTION

TRANSMISSION---10dB

- - - - - -

COAXIAL

HP

OPTION

MEASUREMENT

equipmentasshown

with

rear-panel

Part

No.

08745-20064

connectedtoPORT

and

desired

incident

pushbuttons.

the

Sweep Oscillatortosweep

bandofinterest.

the

Sweep Oscillator

controlstophase-lock

the

frequency

the

GAIN

for

Network

and

an

Analyzer TEST CHAN-

AMPLITUDE

amplitude

unit:

For

8414A

ficient For

8412A

tude

reference (preferably 0 dB).

8746B

adjust for a reflection coef-

of

1.0

(outer

adjust

graticule circle).

for

REFERENCE

to

obtain

equal reference

UNKNOWN~

PORT

/

SHORT

/'

ATIENUATOR

8492A

010

above

REFERENCE

and

with a coaxial

1.

power

and

band

reference

a convenient ampli-

for

LINE,

attenu-

the

Network

the

Network

selected.

VERNIER

on

PLANE EX-

and

£0--1

re-

fre-

the

test

:

HP

llOO5A

FLEXIBLE

ARM

For

a.

ter.

b.

For trace.

7. Adjust

control: a.

For (180

b.

For degrees, a convenientreference.

Return degrees

Measurement:

1. Remove coaxial

nect

the

nate

all

with

the

2. Read

the

indicator.

*

Transmission:

Use

8414A

8412A

Network

8414A

rear-panel

HP

Part

(see

paragraph

Reflection:

Use

rear-panel

HP

Part

adjust

for

adjust

forahorizontal

Analyzer PHASE

adjust

for

REFERENCE

No.

08746..20031 3-1

REFERENCE

No.

08745-20064

dotorsmallest clus-

calibrator

degrees).

8412A

set

DEGREES

and

adjust PHASE

controlto180

VERNIER

Note

8412A

before

device

other

DEGREES

measurement.

short

from

under

testtoPORT

portsofthe

control

PORT1and device

characteristic impedance.

reflection coefficientonthe

7).

VERNIER

reference

to

1. Termi-

under

display

LINE

phase

for

0

con-

test

3-16

Figure 3-10. Microwave Hardware

Measurement(1of

2)

Model

8746B

Operation

•

MICROWAVE HARDWARE

TRANSMISSION MEASUREMENT

Calibration:

1.

Connect page for transmission ERENCE LINE, HP Connect Model

Arm, and

PORT

2. Press'821or attenuation

3.

Set quency

4. Adjust Analyzer- controlstophase Analyzer over

5. Adjust NEL controls for display

a.

b.

6. Adjust 8746B TENSION

channel electrical lengths: a.

equipment

aID-dB

8492A

connect

1. S12

pushbuttons.

the

Sweep Oscillatortosweep

bandofinterest.

the

Sweep Oscillator

the

Network

GAIN

unit:

For ficient

For tude

For cluster.

and

an

8414A

8412A

reference (preferably 0 dB).

8414A

of

to

adjust

1.0

obtain

as

with

Part

attenuator,

Option

amplitude

(outer

adjust

REFERENCE

adjust

010,

attenuatortothe

and

desired incident-power

frequency

Analyzer

AMPLITUDE

fora

graticule circle).

for

equal

for

shown

rear-panel REE-

No.

suchasthe

to

lock

reference

transmission coef-

a convenient ampli-

reference

dot

on

HP

the

Flexible

8746B

the

fre-

and

Network

the

Network

band

selected.

TEST

CHAN-

VERNIER

on

the

PLANE EX-

and

test

or

smallest

MEASUREMENT

Measurement:

1.

Insert 10-dB

2.

To

test, GAIN setting. This is Adjust

a.

b.

c.

To

3. under

a.

b.

4.

To vice PLANE EXTENSION reference and

the

device ·to be

attenuator

determine

note

For

play

For

the The

GAIN settings is transmission gain

under

determine

For the

For phase trace displacement obtained

determine

under

the

TEST CHANNEL GAIN controls:

8414A

on

outer

8412A

reference

difference

test.

test:

8414A

display.

8412A

during calibration.

test

tested

and

PORT

gainorlossofthe

8410A

the

adjusttoIOGate

graticule circle.

adjusttoreturn

obtained

in the

or

phase shift

read' phase

determine phase shift

the

electrical lengthofthe

adjust

test

8746B

to

channel electrical lengths.

between

1.

device TEST calibration setting

the

during calibration.

TEST

magnitude

loss

of

through

shift

directly

from

REFERENCE

again o"litain equal

the

under

CHANNEL

CRT dis-

trace

to

CHANNEL

of

the

device

the

device

from

by

reference

de-

..

For

b.

'7.

Adjust Network Analyzer PHASE control:

a.

b.

8412A

trace.

For

8414A

(0 degrees). For

8412A

ence.

adjust

for

Figure 3-10. Microwave Hardware Measurement(2of

a horizontal phase

VERNIER

calibrator reference

a convenient refer-

a.

For

8414A

ter.

b.

For

8412A

trace.

c. Multiply

plane digital indicator the

electrical lengthofthe

test.

adjust for

adjust

the

dotorsmallest clus-

forahorizontal

change in

2)

by

the

two

reference

to

device

phase

obtain

under

3-17

Operation

APc-7 CONNECTORS

COUPLING

NUT

COUPLING

SLEEVE

Model

8746B

USE

To Connect:

1. On one connector, by turning the coupling. until the sleeve and

2. On the other connector, fully extend thecoup-

ling sleeve by turning the coupling

wise. To engage coupling sleeve and coupling nut when the sleeve is fully retracted, press back lightly on the wise.

3. Push the connectors firmly together, and thread the coupling nut tracted sleeve over the extended sleeve. Leave the

other

coupling closing the gap between coupling nuts tends loosen the electrical connection.

To

Disconnect:

1. Loosen the coupling ing the wider gold band

retr~ct

nut

of nut

the coupling sleeve

nut

counterclockwise

disengage.

nut

clock-

nut

while turningitclock-

the connector with re-

in the original position:

nutofthe connector show-

...

to

CARE

1. Keep contacting surfaces smooth and clean. Irregularities

electrical performance.

COUPLING

CONTACTING

SURFACES

2. Protect the contacting surfaces when the connector is sleeve extended.

SLEEVE

not

and··

foreign particles can degrade

in use by leaving the coupling

2. IMPORTANT: Part the connectors carefully prevent striking the inner conductor contact.

3-18

Figure

to

3-11.

APC-7

Use

3.

Connectors

lintless material and/or firm-bristled brush

such

as

toothbrush for cleaning.Ifa cleaning

is

fluid TANT: Do hydrocarbons, esters, ethers, terpenes, higher alcohols, ketones, benzene, toluene, turpentine, dioxane, gasoline, cellosolve acetate, exposure cleaning fluid and itsvapors as brief as possible.

needed use isopropyl alcohol. IMPOR-

not

of

use aromatic

or

ether-alcohols such

or

the

carbon tetrachloride. Keep

connector partstoboth

or

chlorinated

as

the

Model

8746B

A bulb extractor tool,HPPart No. 4040-0427, has been developedtofacilitate bulb replacement for backlighted

pushbutton switches

BULB REPLACEMENT PROCEDURE

1. Place the endofthe thumbofone hand over the cornerofthe pushbutton switch. With the bulb extractor tool in the other hand, place the hooked end

pushbutton (A) and gently push up until the lower end

of

the type shown below.

of

the

tool into

of

the

the pushbutton lens pops

frontofthe slot.onthe

outasshown in

bottomofthe

Operation

B.

•

A

2.

Remove the pushbutton lens. Place the hollow endofthe and gently pull back. The bulb should stick in the extractor and come pulled backasshown in

C.

bulb extractor tool over the bulbtobe replaced

B

outofits socket as

the

extractor

!~~'~.

.

3. Remove the old bulb from to

the extractor gently twist until

4. Replace the pushbutton lens by first positioning

pushbutton and pressing

Only the pushbutton lens should be removed for bulb replacement. If the pushbutton inadvertently pulled the pushbutton into the front panel and push der

hold the new bulb, insert the new bulb into the socket. To separate bulb and extractor, it

easily slips

of

procedureisthe sameaspreviously given.

the

hollow endofthe

off

the

bulb.

the

bottomofthe lens into place as shown in

out

during replacement, remove lens from the pushbutton. Re-insert

Figure 3-12. Pushbutton Selector Bulb Replacement

extractor and insert the bulb into

the

tabs at the top.

NOTE

in

until pushbutton snaps in place. Remain-

D.

of

the'

the

lens into

hollow end. Using

the

topofthe

is

3-19/3-20

Model 8746B

PerformanceTests

4-1. INTRODUCTION

4-2. The procedures in this section

ment's

cations

All tests can interior operational Check"inSection III.

4-3. EQUIPMENT REQUIRED

4-4.

is listed

electrical performance using

of

Table 1-1 as

be

of

the

test

Equipment

in

the

performed

required for

the

performance standards.

without

instrument.

is needed, see

Recommended Test

If

the

performance tests

SECTION

PERFORMANCE

test

the

instru-

the

specifi--

accesstothe

only a simple

the

"Operator's

Equipment

IV

TESTS

Table in Section I. Any the

critical speeifications given in

substituted

4-5. TEST RECORD

4-6. Results

lated

procedures.

specifications results for

comparison in periodic maintenance .and trou-

bleshooting

for

the

recommended model.

of

the

performance tests

on

the

Test·

The

Test

and

recordedatincoming inspection can be used

and

after

equipment

Record

Record lists allofthe

their

repairsoradjustments.

at

acceptable limits. Test

that

the

Table may

maybetabu-

the

end

satisfies

be

of

the

tested

•

4-7. Directivity

SPECIFICATIO Directivity:

DESCRIPTION: The

8746B under coaxial short sliding load. The Network Analyzer

making

If to duetothe graticule circleisobserved, set the centerofthe

the

sliding load was a perfect termination,

the

directivity signal. However,

sliding load causing its reflected voltage vectortorotate

N:

~30

dB,

0.5to4.0

~26

dB,

4.0to12.4-GHz

testissetup

for

a reflection coefficientof1.

calibrationofthe

directivity signal plus

circle causedbyphasing

Polar Display's

GHz

as a reflectometerbyselecting S11or822.

The

test

channel gainisincreased

outer

graticule circle equaltothe

any

energy from

the

termination is

the

reflection from

the

Sweep OscillatortoCWatthe

the

sliding load

The

system is calibrated with a

short

is removed and

the

coupler's reverse arm would be

not

perfect. Thus

the

sliding load.Ifan indication greater

frequency in question.

around

mustbewithin

the

by

the

indication on

the

tipofthe

the

outer

8746B

directivity specification value,

directivity specification.

graticule circle.

is

terminated

the

Polar Display

than

Then

directivity vector. The

with a

due

only

the

outer

phase (slide)

is

4-1

Performance

Tests

Mode18746B

4-7. Directivity (cont'd)

«)~

S

WEEPOSCI

:

::

~

....

[UIIIJIJ

«)

Q

LLA

:::::

~

.....

0

('I

0 0

PERFORMANCE

TOR

SWEEP

REFERENCE

~-------t~;'''''

l,...,I;[::J:::::q~DLJ-IO..J.:::E=-----4riiiI13-

SLI

DING

LOAD

- - - - -

TESTS

TEST

,'1

/ I

"" I

-"

"

NETWORK

--ill.

CAL

I

:

I

@c::::J

.~

HARMONIC FREQUENCY CONVERTER

-..

ANALYZER

I)

.~.

--=.::~~.

.:~:-.

·

•

.

~

COAXIAL

SHORT

EQUIPMENT:

SWEEP NETWORK HARMONIC SLIDING LOAD COAXIAL REFERENCE

OSCILLATOR

ANALYZER

FREQUENCY

..

SHORT

LINE

PROCEDURE:

a.

Connect

the

equipmentasshown.

2tomeasure. When measuring

shorttoport

b.

the

bandofinterest.

c.' Push

position

d.

traceonthe

being

measured.

Adjust Sweep Oscillator

and

hold

the

controlstoplace

Adjust

Network

outer

graticule circle.

the

Analyzer

Figure 4-1. Directivity Test

. . . . . . . HP

Mode18690A,Bwith

. . . . . . . . . . HP Model

CONVERTER

....

Setup

. . . . . HP Model

. . . . . . .

8691-4A,

8410A/8414A

..

HP Model 90:5A

. . . . . . . . . . . HP Model

HP

Part

No.

08745-20064

Set

PORT1,select

and

Network

8414A

dotinthe

BEAM

centerofthe

TEST

8746B

S11.

Analyzer

CENTER

CHANNEL

for0dB

attenuation.

When measuring

controlstophase

pushbutton

graticule.

GAIN

and

AMPL

PORT

and

Select

2, select

lock

the

adjust

the

VERNIER

either

Network

horizontal

B plug

in

8411A

11565A

PORT1or

822.

Connect

PORT

coaxial

Analyzer

and

vertical

controlstolocate

<

over

the

4-2

Model 8746B

Performance Tests

PERFORMANCE TESTS

•

4-7 Directivity (oont'd)

e. Remove Coaxial

GHz, use HP Model

f. Increase Network Analyzer

to

12.-5

GHz. - -

g.

Set Sweep

h.

Phase Sliding Load must directivity plus

i.

Repeat steps a

909A

Os~.illator

the

Sliding Load while observing

be

within

the

fixed

load

throughhto

Short

Option

to

the

reflection

and terminate

HOI Coaxial Termination.

TEST

sweep very slowly across

outer

graticule circle.

mustbewithin

test

directivityofthe

test

port

CHANNEL GAINby3{),

the

8414A.

the

being measured with a Sliding Load. Below

dll

for

0.5to4.0 GHzor26 dB

the

frequency

The

For

frequencies below

outer

graticule circle.

.other

test

bandofinterest.

centerofthe

port.

circle causedbyphasing

1.8

GHz,

the

display

for

1.8

4.0

the

of

4-8. Source Match 1

SPECIFICATION:

~1.3

(p

VSWR: (Specification appliestostandard model only.)

DESCRIPTION:

Source the coaxial short. The displayed trace

reflectionischanged approximately

circuit. is also marked traces

lEquivalent

matchistestedbymeasuring

reflected signal is varied. A swept-amplitude displayofa

at

any

source

=0.13) (when used

on

the

frequency shouldbeless

reflection

coefficient

with

the

is

marked

18-0°

oscilloscope

than

8411A)

change in magnitudeofa

on

the

by

removing

with

a grease pencil.

2.3 dB (voltage ratioof1.3:1).

miximum

oscilloscope

the

coaxial

The

maximum

with short.

maximum

reflection when

reflectionisobtained

a grease penciL

The

displayed traceofthe

difference

the

when

The

phaseofthe

between

phase

of

using a

open

these two

4-3

Performance Tests

4-8 Source Match (cont'd)

SWEEP

OSCILLATOR

PERFORMANCE TESTS

...

S_WE_EP_R_EF_ER_E_NC_E

-------

..

II@e;;t..

NETWORK

M.ode18746B

ANALYZER

ascI

D

Ir--------.I

0000

-.@

O

-;;: ...,

EQUIPMENT:

SWEEP OSCILLATOR

.-

SW~.EP-

OUT

LLOSCOPE

..

~~-""

HORtZ

0 0 0

_I @ 0

o-rO

O

~O-='

-;Q;'

VERT

IN

,.----

87468

COAXIAL

SHORT

Figure 4-2. Source Match Test

HP Model

Setup

.........

~te).

HARMONIC FREQUENCY CONVERTER

PORT

2

8690

Series with

~

AMPL

-

OUT

RF

unit

as

requi~~d

NETWORK ANALYZER

. HP Model

HARMONIC FREQUENCY CONVERTER OSCILLOSCOPE

COAXIAL SHORT . . REFERENCE LINE

PROCEDURE:

a. Connect

2

to

measure. When measuring

shorttoport

b.

Adjust

swept-amplitude display over

the

equipment

being measured.

Sweep

as shown. Set 8746B for 0 dB

PORT

Oscillator,

the

1 select

Sll.

Network Analyzer, and Oscilloscope controls

frequency bandofinterest.

When measuring PORT 2 select 822. Connect coaxial

..

c. Calibrate Oscilloscope vertical sensitivitytodisplay 1 dB/em.

4-4

8410A

with

Gain Indicator

. . . . . . . HP Model

. . HP Model

180A/1801A/1821A

HP Model

. . . HP

attenuation.

Part

No.

Select either PORT 1orPORT

8413A

Phase-

8411A

11561A

08745-20064

to

obtain

a

Model

4-8. Source Match (cont'd)

8746B

d.

Draw

the

Oscilloscope

PERFORMANCE TESTS

traceonthe

faceofthe

CRT

with

a grease pencil.

Performance Tests

e.

Remove

the

Coaxial

pencil.

f.

The

maximum

difference

This specification appliestothe

g.

12.4

GHz.

h.

Repeat

steps a

throughffor

throughgto

Short

standard

and

draw

between

model

other

test

source

the

traceofthe

tracesatany

8746B

only.

open

circuitonthe

frequency should

faceofCRT

not

exceed 2.3

frequency segments as necessarytocover

matchofthe

other

test

port.

T

2.3dB

1

dB

the

rangeof0.5

with

a grease

(1.3 SWR).

to

4-9. Return Match 1

SPECIFICATION: VSWR:

~1.3

(p

=0.13)

(Specification appliestostandard DESCRIPTION:

Return

reflectometer

lReflection

matchofeach

setup

canceling,atsingle frequencies,

coefficientofport

test

portistested

usedtoterminate

model only.)

using

device

under

the

test.

internal

the

coupler

directivity

associated with

and

Flexible Arm reflections.

the

other

test

portina

4-5

·-f

.-

Performance Tests

4-9. Return Match (cont'd)

SWEEP

::

~ ~

• •

e••.........

O<.@

0 0 0 0 0

OSCILLATOR

.:::::

,

••

PERFORMANCE TESTS

SWEEP

REFERENCE

......

------------

,..----~re)

NETWORK

..

11

@=..

•

HARMONIC

FREQUENCY

CONVERTER

[!=::!J

ANALYZER

8)

"'=0_

.--~

Model 8746B

·

:

•

EQUIPMENT:

SWEEP OSCIL.LATOR HP Model NETWORK ANALYZER HP Model

HARMONIC FREQUENCY CONVERTER HP Model

FLEXIBLE ARM HP Model

COAXIAL SHORT . . . . . . . . . . . . . . . . HP Model

SLIDING LOAD . . . HP

REFERENCE LINE . . . . . . . . . . . . . HP

PROCEDURE:

a. Connect

2tomeasure.

SLIDING

pa::(JG=

the

equipment

COAXIAL

a:::J)o-----

LOAD

mtI

BELOW1.8

FIXED

SHORT

...

GHz

LOAD

--:::'~""~"""~ll

- - -

Figure 4-3.

,,/

",

Return

FLEXIBLE

HP Model:909A

as shown. Set 8746B

ARM

Match Test

Setup

8690

Series

with

RF

'~nit

as required

8410A

with

8414A

Display

Unit

8411A 11605A 11565A

Model905A

Option

for

0 dB attenuation. Select either PORT 1orPORT

HOI Coaxial Termination.)

(Below

Part

1.8

No. 08746-20031

GHz use

4-6

1.

When measuring PORT 1 and

Select S22-

2. When measuring PORT 2 and select

811.

return

match, connect long sectionofthe

Flexible ArmtoPORT

Flexible ArmtoPORT I

2

Model 8746B

Performance Tests

PERFORMANCE TESTS

•

4-9. Return Match (cont'd)

b.

Connect a coaxial

c. Adjust-,Sweep Oscillator

the

frequency

d.

position controls

e. Adjust

trace

on

frequency range being swept.

f. Rempve

measured.

g. standard the

reflection coefficient does

directivity from

bandofinterest.

Push

and

hold

the

to

place

the

Network

the

outer

the

Increase Network Analyzer TEST CHANNEL GAIN

model

1.

2. Disconnect Flexible Arm from

8746B

the

Set

the

greatest reflectiononthe

Analyzer

graticule circle.Ifthe

coaxial short

only.)

8746B reflection coefficient as follows:

Sweep OscillatortoCW

shorttothe

and

8414A dotinthe

TEST

The

polar displayofreflection

not

meet

free

endofthe

Network Analyzer controlstophase

BEAM CENTER

centerofthe

CHANNEL GAIN

trace deviates

and

connect

specifications, separate

and

Polar Display.

the

port

Flexible Arm.

pushbutton

graticule.

and

from

the

free

end

coefficient shouldbewithin

select

the

frequency which correspondstothe

being measured.

~Jt,

and

AMPL

a circle

of

the

by18-dB.

the

Flexible Arm reflection

lock

the

Network

adjust

by

the

horizontal

VERNIER

more

Flexible Arm

(This specification appliestothe

controlstolocate

than5mm,

Analyzer"over

and

.narrow

to

the

outer

and

port

vertical

being

circle.

coupler

point

the

If

of

3. Connect a Sliding Load

Termination. While phasing pushbutton, centerofthe Below

4.

Disconnect measured.

1.

Repeat steps a

12.4

GHz. .

j. Repeat steps a

adjust

1.8

GHz, place

the

The

throughhfor

throughito

to

the

Flexible Arm. Below

the

Sliding Load

the

Polar Display vertical

circle caused

the

Sliding Load (or termination)

displayofreflection coefficient shouldbewithin

test

by

phasing

dot

indicationinthe

other

frequency segments as necessarytocover

return

matchofthe

the

Sliding

centerofthe

and

horizontaf

Loadinthe

and

other

1.8

GHz use

without

connect

test

port.

CRT graticule.

909A

pressing BEAM CENTER

position controlstoplace

centerofthe

Flexible Armtothe

the

Option

outer

graticule circle.

the

H68

CRT graticule.

port

rangeof0.5

Coaxial

the

being

to

4-7

~,

,.'

Performance Tests

Hewlett-Packard Model S-Parameter

Serial No.

Paragraph No.

4-7

4-8

Test

Table 4-1. Performance Test Record

8746B

Set

Test

Directivity:

0.5to4.0

4.0to12.4'GHz

Source Matchinvoltage ratio

(Standard model

only)

Test Performed

GHz

by

Date

~B'

- Minimum 30

26

dB dB

Results

Actual

Model 8746B

Maximum

2.3 dB

4-9

Return Matchinreturn

(Standard model

only)

loss

18

dB

';L--

4-8

Model

8746B

Adjustments

SECTION

ADJUSTMENTS

5-1. INTRODUCTION

5-2. This section provides instructions for adjust-

The

ing tIle ·8746B.

performed supply voltage adjustments are However, be

within 48

made. No appreciable tionofthe Service Sheet. 6.

separately.

the

ac voltage

to

voltage adjustments will

5-3. EQUIPMENT REQUIRED

5-4.

Equipment

in

the

Recommended

Section I.

"A"

in

Equipment

the

Use column.

5-5. ELECTRICAL ADJUSTMENTS

5-6.

The

only electrical adjustments are power

supply

output

following adjustments can be

The

440

required

voltages.

order

inputtothe

Hz when this adjustment

warmup

for

Test..Equipment

for

adjustment is marked

The

of

not

is necessary. Loca-

adjustmentsislisted

adjustment

the

power

important.

8746B

be

found

Table .in

locations

must

on

V

are shown manual). With ±10%,48to

a. Connect

an-d

is

Adjust ±O.5V.

b.

and

Adjust

±O.5V.

5-7. MECHANICAL ADJUSTMENTS

5-8.

counter

clutch, refer

on

Service

anacinput

4~O

Al

TP3 with positive lead going

AIR14

Connect

Al

TP3 with negative lead going

AIR17-(-25V

The

friction clutch.

only

to

(+25V ADJ)

m.echanical

Figure 5-1.

Sheet

6 (last

voltageof115V/230V

Hz, proceed as follows.

voltmetertotest

for

voltmetertotest

ADJ)

for

adjustmentisthe

To

adjust

foldout

pointsAlTPI

a voltageof+25V

pointsAlTP2

a voltage

sheet

to

Al

TPI.

toAlTP2.

of

~25V

digital

this friction

in

I

i

I

5-1

Adjustments

Model 8746B

FRICTION CLUTCH ADJUSTMENT

2 3

5-2

Remove

1.

2. Loosen holding

(2)

shaft.

the

3. Hold washer tightening

(2).

4. Check follows:

a. Adjust

EXTENSION reads all zeros.

8746B

the

two hollow hex-head screws

the

collar tightly against

the

flattening

(3)

the

operation

the

top

collar

hollow

REFERENCE PLANE

crank

Figure

cover.'

in position

(1)

washer, while

the

on

spring

hex-head screws

clutch as

the

of

until

Digital Counter Friction Clutch

5-1.

counter

b. Hold

cation clockwise until

Release

Rotate

c.

stop

15

cate

Rotate

d.

until ter

again. zeros, readjust

repeat

and

retain zero indi-

thumbwheel

rotate

and

thumbwheel.

the

crank

the

is reached.

or

em

the

stop

the

to

the

stop

the

clockwise

dial should indi-

The

reached.

is

until

the

counter-

crank

greater.

crank counterclockwise

coun-

reached.

is

The

dial should indicate all zeros

indicate all

the

not

friction

clutch

If

the

dial does

this check.

Adjustment

Model

8746B

'Replaceable Parts

I

t,

I

REPLACEABLE

6-1. INTRODUCTION

6~2.

This

section

replaceable

is' available as Exchange assemblies afford considerable saving,

but repairable assembly is each

factory-repaired

bly.l 6-3. Table 6-1 gives

tions

and

reference designations

of

replaceable parts.

6-4. Table 6-2 is is organized as follows:

a. Electrical assemblies

nents

in alpha-numerical

nation.

b.

Chassis-mounted

orderbyreference designation.

contains

parts.

The

step

eitheranewora

are

available

and

the

tableofreplaceable parts,

information

attenuator

for

assembly

rebuilt

ordering

assembly.

onlyona trade-in basis. A

required

tested

meaningsofthe

in

exchange

reuseable assem-

abbrevia-

usedinthe

and

their

orderbyreference desig-

parts

in' alpha-numerical

SECTION

A6

cost

for

table

and

compo-

VI

PARTS

c.

descriptionofthe

d.

typical

e.

the

code,

the

quantity

first

appearanceofthe

5-digit

Total

at 6-5. Table 6-3

that

correspond

bers.

ORDERING INFORMA'TION

6-6.

6-7.

To

orderapart Table" provide with

the

following

a.

The

Replaceable'Parts table.

b.

The

manufacturer

and

manufacturer's

for

each

contains

to

the

listed in

the

nearest

information:

Hewlett-Packard ,Part No.

quantity

required.

part,

of

the

number

partisgiven

part

the

names

only

number.

and

manufacturers'

the

Replaceable Parts

Hewlett-Packard

part

for

code

in

the

part.

once

-

addresses

num-

office

from

the

a

c.

Miscellaneous parts.

d.

Illustrated assembly drawings as follows:

Figure 6-1, Model Figure 6-2, Figure 6-3 all

inte~face

The coupler

The

information a. b.

RF

IN

andisnot

The total

Front

through

connectors

connector

Hewlett-Packard

quantity

8746B

Pan~l

Assembly

6-5

show

Front

Panel Assembly

replaceable

except

is

part

RF

of

separately replaceable.

given

for

each

part

consists of:

part

number,

(Qty)inthe

instrument,

parts

of

IN

(DC3Jl).

a directional

6-8.

To

orderapart Parts table, provide office

with

the

following

a.

Instrument

b.

Complete

c. Description d.

Quantity

lWhen

ordering

assembly

part

extra

number

assemblies

only.

not the

information:

model

serial

number,

and

functionofpart.

required.

Exchange

listedinthe

nearest

Hewlett-Packard

number.

including

for

spare

parts

assemblies

Replaceable

prefix.

stock,

require

use

trade-ins.

new

6-1

Replaceable Parts

Model 8746B

A B BT C CP CR

DC

DL DS E

A

AFC AMPL

BFO

BECU BH BP BRS BWO

CCW CER CMO COEF COM COMP COMPL CONN CP CRT CW

DEPC DR

ELECT

°ENCAP

EXT F

FH FILH

FXD

G

GE GL GRO

assembly motor battery capacitor coupler diode

=

directional

delay

line

device

signaling

mise

electronic

amperes automatic control amplifier

beat

frequency

tor

bery

llium

binder

head bandpass brass backward

tor

counterclockwise

ceramic

cabinet

mount

coefficient

common composition complete

connector cadmium cathode-ray

clockwise deposited

drive electrolytic

encapsulated

external farads

flat Fillister fixed

giga germanium glass ground(ed)

head

(10

head

9

)

plate

Table 6-1. Reference Designators and Abbreviations Used in Parts

REFERENCE DESIGNATORS

plug transistor resistor thermistor switch transftlnner terminal test

point

integrate~

normally nominal

n~gative

zero perature ficient) negative-positivenegative not for placement not replaceable

order description oval oxide

peak printed picofarads=10-

farads phosphor

=

Phillips peak voltage positive-negativepositive part polystrene porcelain position(s) potentiometer peak-to-peak point peak age

rectifier radio round right

positive

(zero

coef-

recommended

field

re-

separately

by

head

circuit

inverse

of

working

frequency

head

hand

board

circuit

open

teni-

12

bronze

volt-

or

coupler

frequency

oscilla-

copper

wave

oscilla-

only

tube

carbon

(lamp)

part

F FL

J

K

L LS

M

MK

MP

H HDW HEX HG HR

Hz

IF IMPG INCD INCL INS INT

K

LH LIN LKWASH LOG LPF

M

MEG METFLM MET

OX

MFR

MHz

MINAT MOM

MOS

MTG

MY

N N/C NE NIPL

fuse

Filter jack relay inductor loud meter microphone mechanical

henries hardware hexagonal mercury hour(s) Hertz

intermediate impregnated

='

incandescent include(s) insulation( internal

kilo=1000

left

hand linear lock logarithmic low

pass

milli=10meg=10 metal metallic manufacturer mega miniature momentary metalized substrate mounting "mylar"

nano normally neon nickel

speaker

part

ABBREVIATIONS

freq

ed)

taper

washer

taper

filter

3

6

film

oxide

Hertz

9

(10-

)

closed

plate

P

Q

R

RT S T TB TP

U

N/O

NOM NPO

NPN NRFR

NSR

OBO OH

OX P

PC

Pf

PH PHL PIV

PNP

PIO

POLY PORC POS POT PP PT PWV

RECT RF RH

BRZ

List

V

VR W

X

Y Z

RMO RMS RWV

S-B

SCR SE SECT SEMICON SI SIL SL SPG SPL SST SR STL

TA TO TGL THD TI TOL TRIM TWT

f1

VAR VOCW

WI

W

WIV

WW

WIO

vacuum

neon

photoce~

voltage regulator cable socket crystal tuned network

rack

mount root-mean reverse voltage slow-blow screw selenium section(s) semiconductor silicon silver slide spring special

=

Stainless split

ring steel

tantalum time

delay toggle thread titanium

tolerance trimmer traveling tube

micro=10-

variable dc

working

with watts working voltage wirewound without

tube,

bulb,

cavity,

working

steel

wave

inverse

etc.

only

square

6

volts

6-2

I

!

I

•••.

f

I

,

!

•

'.".'.'

..

~"

I

Model

8746B

Reference Designation

Al AIel

AiC2

AIC.3

AIC4 AICRI

AICR2 AlCR3 AICR4 A1CR5

AICR6 AICRl AICR8 AI'll AI02

AIO.3

AIQ4

AI'l5

AIQ6

AIQ1 A1Q8

A1Rl

Al1<2

AIR3 AIR4

AIRS

AIR6

A1R1 AIRS A1R9

AIRI0 AIRll A1R12 AIR13 AIR14

AIR

15 AIR16 AIR11 AIR18

A2

A2Cl

A2C2

A2CRl

A2CR2

/l2CR.3

A2CR4

A2CR5

A2CR6

A2eR1

A2eR8

A2eR9

A2CRIO A2CRll

A2CR12

A2eR13 A2CR14

A2CR15

A2CR16

A2eRl1

A2eR18 A2eR19

A2CR20 A2CR21 A2CR22 A2CR23

A2CI<24 A2eR25

A2CI<26

A2CR27 A2CR28

A2CI<29 A2CI<30 A2CR31 A2CR32 A201

HP

Part Number

08746-60052

0160-3451 0160-3451

0180-0141

1901-002~

1901-0029

1901-0029 1901-0029 1902-3193

1902-3193

1901-0029 1901-0029 1853-0020

1853-0050

1853-0012

1853-0052

l'854-C071

1854-0()71

1854-00~9

1854-0072 0764-0016

0764-0016

0698-3640 0151-C346

0151-0346 0698-3640 0157-0421 0151-0199

0751-C199

0151-0421 0811-1552 0813-0029

0698-3154

2100-1158

0751,-04~f

0151-043S

2100-1756

0698-3154

08146-60050

0180-1147

0180-1714

I·SCI-0025

19C2-o.041

1901-0025

1902-0041

1901-0025

1~02-0041

1901-0025

1902-0041

1901-0025

1902-0041

1901-0-025

1901-0025

1902-0041

1901-0025

1901-:0025

1901-0025

1902-0041

1901-0025

1901-(}'()25

I901-(W25

1902-0041

1902-0025

1901-0025

1901-0D25

1901",,0025

lc;02-31f2 lli02-Q049 1902-0041 1854-0C71

Table 6-2. ReplaceableParts

Qty

23

30

38 13

BOARD

1

C:fXD

2

C~XO

C:fXO

2

C:FXD

6

OIODE:SILICON DIODE:SILICON DIOOE:SILICON OIODE:SILICON OI.oOE

2

DIODE OIODE:SILICON OIOGf:SIlIeON TSTR:SI TSTR:SI

1

ISTR:SI

8

TSTR:SI

1

TSTR:SI TSTR:SI NPN(SElEeTED TSTR:SI

9

TSTR:SI·NPN

I

R~XD

2

R:FXD R:FXD

2

R:fXD

2

R:FXO R:FXO R:fXD

2

R:FXO

2

R:fXD R:fXDMET

R:fXDWW0.56

1

R:fXDWW1

1

R:FXD

2

R:VARW~lK

2

R:fXO

2

R~fXO

R:VARWWlK R:fXO BOARD

1

C:fXD

1

C:~XD

1

OIOOE:SILICON 100MA/IV OIODE:6REAKDOWN CICDE:SILICON

DIOOE:8REAKOCWN OIOOE:SLLICON 100MA/IV OlOOE:SllICON 100MA/IV OIOOE:BREAKDGWN DIODE:SIlICON 100MA/1V

DIGDE:SIlICON DIODE:8REAKDOWN DIGDE:SILICON 100MA/IV OIOBE:SIlIGDH 100MA/IV OIOOE:SILICCN 100MA/IV

DIODE:BREAKOOWN DIODE:SIlICON 100MA/IV DIOOE:SILICQN 100MA/IV OIOOE:BREAKDOWN OIDBE:SIlICON

OIODE:SIlICON 100MA/IV DIQDE:SILICON 100MA/IV OIOOE:BREAKCOWN OIOOf:SILICCN 100MA/IV OIOOE:SIlICON 100MA/IV

DIODE:SILICON 100MA/IV DIOOE:BREAKDGWN OlCOE,BREAKCOWN:I0.0V5%400

OIGDE:SI~ICON

OIOOE:SIlICON DICDE:SILICON

DIODE OIOOE:6REAKOOWN OIODE:BREAKDVWN lSTR:SI

Description

ASSY:POWER CER CER

·ElECl50·UF ELECt50Uf +15-10%

BREAKDOWN:13.3V BREAKDOWN:13.3V

PNP(SELECTED PNP

PNP PNP NPNCSElECTEO

NPM

METFlH

,MET

METOXl.aK NET

MET

METOX1.8K

MET MET MET

MET

NET MET

MET ASSY:8UFfER

ELECT ELECT

BRfAKDCWN:SllIeON

NPNISElEeTEO

SUPPLY

0.01

.UF

+80-20~

Q.Ol Uf +80--20%

+15-10t

600

PIV

600

PIV

600

PIV

600

PIV

600

plv

600

PIV

1000

fila flM10OHMl~1/8W FLM10OHMIIIJ8W fLM

fLH fLM

flM

fLM FlM

FlM

OHM5&2W

1000

GHM512W

OHM512W

OHM5%2W

825

OHM

21.5K

OHM

21.5K

OHM

825

OHM

OHM5%2W

OHM313W

4.22K

5.11K S.IIK

4.22K

Uf

201

Uf

101

5.11V

IDOMA/IV

5.11V

lOOMA/IV

5.11V

S~IIV

IOOMA/IV

S.11V

5.11V

100MA/IV lOOMA/IV

lOOMA/IV

6.19V

5.1lV

OHM1%1/8W

OHM1%1/8W OHM

OHM1&1/8W

OHM51TYPEVlW

CHM5&TYPEVIN

150 330

5%

51

FROM

FROM FROM

1%

11

15VOCW 6VCCW

5&

5%

5&

5'

5&

51

5% 5%

fROM

100VOCW

50voew

50VOCW

2N3102)

2~3104)

2N3704)

1/8W

11

1/8N

1&

1/8W

1/8N

1%

1/SW

12.1V

2N3704)

MW

5%

Replaceable

Mfr Code

28480

56289 56289 56289

~

56289 2848C

28480

28480 28480

28480 28480 28480 28480 28480

80131 80131 28480 28480 80131

80131 28480 28480 28480 28480

28480

28480 28480 28480

28480

28480 28480 28480 28480

28480

28480 28480 28480

28480 28480 01263 04113 01263

04113 07263 01263 04113 01263

07263 04113 01263

07263

04113

01263

07263

04113 01263

01263 07263

04113

01263 01263

01263 04113 28480 07263 01263

07263 28480 04113 04113 28480

Mfr

Part Number

08146-60.052 C0238101FI031S25-COH C023BI01f1031S25-COH 300506G050002-0SM 300506G050002-05M

1901-0029 1901-0029 1901-0029 1901-0029 1902-3193

1902-3193 1901-0029 1901-0029 IS53-C020 IS53-0050

2N2904A 2N3140 1854-C011 1854-0011 2N3053

2N3054 0164-0016 0164-0016 069S-3640 0157-0346

0751-0346 0698-3640 0151-0421 0157-C199 0151-0199

0157-0421 0811-1552 OS13-0029 0698-3154 2100-1158

0157-0438 0157-0438 2100-1758 0698-3154 08146-60050

01S0-1141 01S0-1114 fO

2381

5l10939-98

FO

2381

Sl10939-98

FD

2381

FD

2381

51109139-98

fO

2381.:...

fO

23.81

Sl10939-98

fD

2381

fO

2381

fO

2381

Sl10939-98

fD

2381

FD

2381

Sl10939-98

fD

2381

FO

2381

fG

2381 5Z10939-98 fD

2381 fD·

2387 fO

2381

5l10939-98

1902-0025 fD

2387

fD

2381 FD

2381 1902-3182

5110939-122

5Z1093Cl)-98 1854-0071

Parts

See

introductiontothis

section

for

ordering

information

Replaceable

Parts

Table 6-2. Replaceable Parts

Model

87468

Reference

Designation

A2Q2 A2Q3 A2Q4 A2Q5 A2Q6

A2Q7 Aloa A2Q9 A2QI0 A2Qil

A2012 AlQ13 A2Ql4

A2Q15

A2Q16 A2Qll

A2Qi8 A2Q19 A2Q20 A2Q21

A2Q22

A2022 A2Q23 A2Q24 A2Q25 A2Q26

A2Q27 A2Ri

A2R2

A2R3

A2RLt A2RS

A2R6 A2Rl A2RB A2R9

A2RlO A2Aii

A2R12

A2R13 A2R14

A2R15

A2R16 A2R17

A2Rl8

j A2R19

A2R20

A2R2l

A2R22

A2R23

A2R24

A2R25

A2R26

A2R27

A2R28

A2R29

A2R30

A2R31

A2R32

A2R33

A2R3Lt

AlR35

A2R36

A2R31

A2R38

A2R39

A2R40

A2R41 0683-1-025

A2R42

A2R43

A2R44

A2R45

A2R46 Q.698-4261

A2R47

A2R48

A2R49 06<;8-4261

HP

Part Number

18S3-GC20 1854-0011 1853-0020 1854-0011 1853-0020

1854-0011 18'53-CC20 1854-0011 1853-0020 1854-0011

18'53.,.0020 TSTR:SI 1854-COll 1853-0020 1854-0011

1853-0020

1854-0011 1854-0011 1854-0011 1854-0011 1854-0071

1854-0062 1205-0048

1853-0012 1854-0039

1854-~071

1854-0C39

1853.-0C12 0698-4210 0683-1025 0698-4276 0151-0191

0698.,.4270 0683-1025 0698-4218 0698-4262 0151-C1S1

0698-4210 0683-1025 0698-421E 0151-0191 0698-4270

0683""!'1025 0698-4276 0157-0191 0698-4270

0.683-1,025

06~B-4218

0157-07<;1

0698-4270

0683-1025

0698-4218

0157...,0797 0698-4210 0683-1;Q25 0698-1t21e 0151-C1<;1

0698-4270 06e3-1025 0698-4276

0151-C1~7

0683-1025

0698~4261

G698-4242 0683-1025 0698-42fl 0698-4242

0683-1025 0683-1025

0698-4261 0698-4242

0683'"'!1G25 0:698-4242

0683-1025

Qty

12 33 18 12

TSIR:SI TSTR:SI NPN(SElECTED TSTR:SI TSTR:SI TSTR:SI

TSTR~SI

TSTR:SI TSTR:SI TSTR:SI ·PNP(SElECTED. TSTR:SI

TSTR:SI ·NPNISElECTED TSTR:SI ·PNPISElECTED TSTR:SI TSTR:SI

TSIR:SI TSTR:SI TSTR:SI TSTR:SI TSTR:SI NPNISElECTED

1

TSTR:SI HEAT

1

TSTR:SI TSTR:SI TSTR:SI TS1R:SI

TSTR:Sl R:fXD R:fXDCOMP R:fXD R:FXO

R:EXO R:fXD R:FXD R:FXD

1

R:FXD R:fXD

R:fXD R:FXO R:fXD R:fXD

R:FXD R:fXD R:fXD R:fXD R:fXD teMP

R:fXD R:FXD

R~fXD

R:FXD R:FXD

R~XD

R:fXD R:fXD R:FXD R:fXD

R:FXD R:fXD R:fXO"F.LM R:FXD R=fXD

5

R:FXD R:fXD

5

R:FXD

R~FXD

R:fXD

R:FXO R:fXD

R:fXD R:fXD

R:fXD~lM

R:FXO R:fXO flM R:FXD R:FXO

R~FXO

Description

PNPISElECTEO PNP(SElECTED

NPNCSElECTED PNP(SElECTED

NPH(SElECTED PNPISElECTED NPNISElECTED

~PN(SElECTED

PNPISElECTEO

·NPN(SElECTED PNPISElECTED FROM'2N3702)

NPNtSElECTED NPMtSElECTEO NPNISElECTED NPNISElECTED

NPN

SINK:FINNED?

PNP NPN

·NPMJSElECTEO

HPN

PNP

flM

4.1K 1000

FLM

10K

MET

fLM

FlM

4.1K

COMP

1000

F~.

10K FlM Z.2KOHM5S1/ew MET

flM

fl~

4.1K

COMP

1000 FlM 10K MET

flM

FLM

4.1K

CUHP

1000

fLM

10K

NET

ELM

flH

4.7K 1000

flM

10K

HET

FlM

fLK

4.1K

CCMP

1000

flM

10K

MET

ELM

flM

4.1K

COMP

1000

ELM

10K

MET

FlM

flH

4.7K

ceMP

1000

10K

MET

flM

GOMP

1000

flM2KOHM511/8W flM

300

CDMP

1000

FLM2KOHM

flM

300

co~p

1000

CGMP

1000

COMP

1000

fLM2KOHM511/8W

300

CGMP

1000

2K

OHM511/8W

flM

300

teMP

1000

~lM

2K

OHM511/8W

FROM fROM FROM fROM fROM

fROM

FROM FRCM FROM FROM

fROM

fROM fROM

FROM

fROM FROM fROM fROM

FOR

TO-8

fROM

OHM5.l/8W

OHM5~1/4W

tHM

51

li8N

90.9

OHMISlA2W

OHM5a1/8N

OHM

51 1/4W

OHM511/BW

90.9

OHM111A2W

OHM5S1/8N

OHM511/4W

OHM511/8W

90.9

OHMIS1A2W

~HM

5S

1/8W

OHM

51 1/4W

CHM511/8N

90.9

OHMII1/2W

OHM511i8N

OHM511/4W

OHM

5S 1/8W

90.9

OHMISIt2W

OHM511/8W

OHMIsa1/4W

OHM511/8W

90.9

OHMISlA2W

OHM511/8W

OHM511/4W

OHM511/8W

90.9

OHM111/2W

OHM511/8W

OHM511/4W

OHM5~1/8W

90.9

OHM

11 ll2W

OHM511/4W

OHM511/8W

OHM511/4W

51 1/8W

OHM

51 1/8W

51 1/4W

OHM OHM511/4W OHM5%1/4W

OHM511/8W

OHM5~1/4W

OHM511J8W

OH~

51 1/4W

2N3702) 2N3104) 2N31021 2N3704)

2N3702) 2N3704)

2N3702) 2N3704) 2N3702) 2N3104)

2-N31,02)

2~3104)

2N3102) 2N3104)

2N31~4)

2N3704) ZN3704)

2N3704) 2N37041

CASE

2N3104)

Mfr Code

28480

28480 28480 28480 28480

28480 28480 28480 28480 28480

80131 05820

80131 80131 28480 80131

80131 28480 01121 28480 28480

28480 01121 28480 28480 28480

01121 28480 28480

28480

01121 28480

28480 28480 01121 28480

28480 28480 01121 28480 28480

28480 01121 28480

28480

01121 28480

28480 01121 28480 2848'0

01121 01121 01121

28480 28480

01121 28480 28480 01121 28480

Mfr

Part Number

1853-0020 185lt-CC71 1153-0020 1851t-0071 1853-0020

185lt-0071

1853-0020 185lt-C071 1853-0020 1854-0011

1853-0020 1854-.0011 1853-0020

1.-'854-0011 1853-0020

185lt-0071 1854-0071 1854-0071 1851t-0071 1854-0011

2N1701 213-C6

2N2904A 2N3053

1854-0071

2H3053

2N2904A 0698-4210

&8

1025 0698-4218 015'7-0191

0698-4270

C8

1025 0698-4218 0698-4262

0751-0191

0698-4270

C8

1025 0698-4278

0751-J)791

0698-4210

C8

1025 0698-427.

0157-.0797

0698-4210

CB

1025 0698-4218

0151-0791

0698-4210

C8

1025 0698-42,?;f!.

0151-.0791

0698-4210

CB

1025 0698-4278

0151-.0191

0698-4270

C8

1025 0698-4278

0151-0191

CB

1025 0698-4261

0698-4242

CB

1025 0698-4261 0698-4242

C8

1025

C8

1025

CB

1025 0698-4261 0698-42"2

C8

1025 0698-4261 0698-4242

C8

1025 0698-4261

See

introductiontothis

section

for

ordering

information

Model

87468

Table 6-2. Replaceable Parts

Replaceable

Parts

Reference Designation

A2R50

A2R51 A2R52 A2RS3 A2RS4

A2RSS A2R56 A2RS1 A2RS8 A2R59

A2R60

A2R61 A2R62 A2R63 A2R64

A2R65 A2R66

A2R61 A2R68 A2R69

A2Ul A2U2 A3

A3Cl A3C2

A3C3 A3C4 A3C5 A3CR1 A3CR2

A3CR3

A3CR4 A3CRS

A3CR6

A3CRl A3CR8

A3CR9

A3CRI0 A3CR11

A3CR12

A3CR13

A3CR14

A3CR15

A3CR16

A3CR11

A3CR18

A3CR19

A3CR20

A3CR21

A3CR22

A3CR23

A3CR24

A3c.R25

A3CR26

A3CR21

A3CR28

A3Q1

A3Q2

A303

A304

A305

A306

A301

A308

A3Q9

A3010

A3011

A3Q12

A3Q13

A3014

A3015

A3016

A3011

A3Q18

A3019

HP

Part Number

O~9·8-4242

0683-1025

0683-1025 0683-1025

0764-0013

"

0764-0013

0683-1025 0698-4218 0683-1025 0698-4240

0698

...

3t13

0683-1025 0683-1025 0698-4211 0683-1025

0683-2425 0683-3915 0683-1025 0698-4240

0683-0tf5

1820-0092 1820-0092

081'16-60051

0160-2930 0160-2S30

0160-2930

011:0-2930

0160-2930 1901-0025 1«302-0041

1901-00~5

1902-00/tl 1901-0025 1902-00/t1 1901-0025

1902.-00/t1 1902-0025 1901-0025 1901-0025 1901-0025

1901~O025

1902-3104 1902-3104 1901-0025 1901-0025

1,901-0025 1901-0025 1902-3104

I~C1-a025

1901-0025 1902-3104

1<902-3104 1901-0025 1«;01-0025 1901-0025

1901-Q025 1854-0011 1853-0020 1854-0011 1853-0020

1854'"'t0011 1853-0C20 1854-0011 1853-0020 1854-0()11

185/t-0039

1853-0020

1854-0011 1853-0012 1853-0020

1854-G071

1854-0C3~

1853-0.020 1854-0011 1853-0012

Qty

R:FXD R:fXD R:fXD R:FXD R:FXD

2

R:FXD R:fXO R:fXD R:fXD R:FXD

2

R~FXD

1

R:fXD R:fXD R:fXD

1

R:FXDCOHP R:FXG

1

R:fXD

1

R:FXD R:fXO R:FXD

1

INTEGRATED

2

INTEGRATED BOARI

1

C:FXD

6

C:FXD

C:~XD

C:FXD C:fXD DIOGE:SI.LICOH 100MA/IV DIODE:8REAKDOWN

OIOOE:SILICON 100MAIlV DIODE:8REAKOOWN DIODE:SILICON lOOMA/lV DIODE:BREAKDOWN DI.ODE:SILICtJ,. lOOMA/lV

DI09E:8REAKOOWN DIOOE.8REAKDDWN:IO.OV DIOOE:SLlICGN 100MA/IV OIOGE:SILIGON DIODE:SlLICON 10OMA/IV

DIOOE:SILICON lOOMA/lV OIODE:8REAKDOWN

5

OIOOE:8REAKOOWN DIODE:SILICOH 100MAIIV DIODE:SILJCON 100MA/1V

DIGOE:SILICCN 10OMA/IV DIODE:SILICON 100MA/IV DIODE:8REAKDOWN DIODE:SILICON 100MA/lV OIOGE:SILICON 100MA/lV

OIODE:BREAKDOWN DI,oOE:BREAKDOWN DIODE:S1LICON 100MA/IV DIOOE:SILICON DIODE:SIlICON 100MA/1V

DIODE:SLlICCN leOMA/IV TSTR:SI TSIR:Sl TSTR:SI TSTR:SI

TSTR:SI TSTR:SI TSTR:SI TSTR:SI TSTR:Sl

TSTR:SI TSTR:SI TSTR:SI TSTR:SI TSTR:SI

TSTR:SI TSTR:Sl TSTR:SI TSTR:SI TSTR:SI

Description

FLM

300 COMP COMP COMP METOX56

METOX56 COMP FLtOMP

METax39 COMP

FLM

~QNP

COMP COMP FLM CGMP

CER CER

CER CER CER

OHM5~1/8W

1000

OHM5~1/4W

1000

O~M

1000

OHM

OHM5.2.. OHMsa2W

1000

OHM5.1/4W

10K

OHM5.1/8N

1000

ELM

tLMP

ASSY:SWITCH

HPNISELECTED HPNfSELECTED

NPNISELECTED

·NPN PNPCSELECTED

OHM,5' 1/4W

240

OHM

OHM5~2M

1000

OHM5.114M

1000

OHM

5.1K

OHM511L8W

1000

OHM

2400

OHM

390

OHM

1000

OHM

240

OHM5.1L8N

6.8

~HM

CIRCUIT:SWIT~HING

CIRCUIT:SWITCHING

0.01

UF

0.01UF+80-20'

0.01

UF

0.01UF+80-201

0.01UF+80-20'

5.llV

5.11V

5.1lV

5.llV

IOOMA/IV

5.62V

100MAL1V

PNP«SELECTED PNPISELECTED

PNP(SELECTED NPNlSELECTED PHPlSELECTED NPN(SELECTED

NPNCSELECTED PHP PNP(SELECTED

NPN(SELECTED NPI PNPlSELECTED NPI.SELECTED PHP

51

5.

SI

1/8W

5.

51

5.

1/4

5.

l/4W

DRIVER

+80-201

51

5'

51

51 51

51

FROM FROM FROM FROM

fROM FROM fROM FROM FROM

FROM fROM

FROM fROM FROM

FROM

1/4W 1/4W

114M 114M 114M 114M

..

/too

CONVERTER CONVERTER

100VDCW 100VDCM

100VOCW 100VOCW 100VDCW

MW

2fi3704)

2N3102) 2N3704. 2N3702)

2N3704)

2N3702)

2N3104) 2N3702)

2N3104)

2-H3702

2·N31\(4)

2N3102)

2N3704)

2N3102)

2"3704)

Mfr Code

28480

01121 01121 01121

~

)

28480 28480

01121 28480 01121 28480

28480 01121 01121 28480 01121

01121

28480

01121 28480

28480

91418 91418

91412 91418 914lE

01263

04113 01263

04113

01263 04113 01263

04113

28480 01263 01263 01263

01263 04113 04113 01263 01263

01263

04713 01263 01263

04113 0/t113

01263 01263

07263 07263

28480 28480 28480 28480

28480 28480

28480 80131

28480 28480 80131 28480

28480 80131

28480

28480 80131

Mfr

Part Number

0698-4242 C8

1025

C8

1025

C8

1025

0764-0013 0764-0013

C8

1025 0698-4218 C8

1025 0698-4240

0698-3613 C8

1025 CB

1025 0698-4211 C8

1025

CB

2425

C8 3915·

C8

1025

0698-4240 C868G5

1820-0092 1820-0092 08746-60051

TA

TA TA

TA TA FD

2381

SZl0939-98 FD

2381

SZ10939-98 FD

2381

SZ10939-98 FD

2381

SZ10939-98

1902-0025

FO

2381

FD

2387

FO

2381

FD

2381

SZ10939-110 S110939-110 FD

2381

FO

2381

2387

FD FO

2381

S110939-110

FD

2381

FO

2387-:"

S110939-110 S110939-11Q FD

2387

FO

2381

FD

2381

FD

2381 1854-0011 1853-0020 1854-0011 1853"'0020

1854-:0011 1853-0020 1854-C011 1853-0020 1854-0011

2N3053 1853-0020 1854-C071 2N2904A 1853";0020

1854-0071 2N3053 1853-0020 1854-0011 2N2904A

See

introductiontothis

section

for

ordering

information

Replaceable

Parts

Table 6-2. Replaceable Parts

Model

87468

Reference

Designation

A3020.

A3021 A3022 A3023

A3024 A3025

A3026 A3Q21 A3028

A3Q29 A3030

A3031 A3032

A3033 A3034

A3Q35 A3Q36 A3031 A3Q38

A3Rl

A3R2

A3R3

A3R4

A3R5

A3R6

A3R1

A3R8

A3R9

A3RI0

A3Rli

A3R12

A3R13

A3R14

A3R15

A3Rlb

A3Rl1

A3R18

A3R19

A3R20

A3R21

A3R22

A3R23

A3R24

A3R25

~

A3R26

A3R21

A3R28

A3R29

A3R30 06.98-427.2

A3R31

A3R32

A3R33

A3R34

A3R35

A3R36

A3R31

A3R38

A3R39

A3R40

A3R41

A3R42

A3R43

A3R44

A3R45

A3R46

A3R47

A3R48

A3R49

A3R50

A3R51

A3R52

A3R53

A3R54

A3R55

A3R56

HP

Part Number

1853-0020

1854-0011

1854-0C3S 1853-0020 1854-0011

1853-0012 1853-0020

1854-0011

1854-CD3S

1853-00.20

1854-0D71

1853-0012

1853-0020

1854-0011

1854-0.039

1853-CC20 1854-0011

1853-0012 1853-0020

06.~8-4210

0683

...

1025

06.98-4278 0151-C197

0698-4210

0683-1025

0698-4218

0698-4262 0757-0197

0698-4210

0663-1025

0698-4278

0151-G7S1 0698-4210

0683-1025

0698-4218

0157-07S1

0683-1025 0683-1025

0698-4278

0683-f6235 0683-6235

0698-425S

0698-4294

0698-4272

0698-4262

0698-425S

0698-42C;4

0698-42e2'

0757-0833

0757=0833

0757-0833 0683-1C15

0683-1015 0683-1015 0683-1015 0683-0335 0683-0335

0683-0335 0683-0335 0683-1025

0698-4218 0683-6235

Q698-42SS 0698-42S4 0698-4212

0698-4262

0757-0833

0757-0833 06B3-1C15

0683-1C15 0683-0335

0683-0335

Qty

10

TSIR:SI TSTR:Sl

TSIR:SI TSTR:SI TSTR:SI

TSTR:SI TSTR:Sl TSIR:SI TSTR:SI TSTR:SI

TStTR:Sl NPNISELECTED TSTR:SI TSTR:SI TSTR:SI TSTR:SI

TSTR:SI TSTR:SI TSTR:SI TSTR:SI R:FXO

R:fXD R:fXD

R:fXO

R:fXD R:fXD

R:fXO R:FXD R:FXD R:fXO ·FlM

R:FXD R:fXD

R:FXD·.•MET R:FXD

R~XD

R:FXD

R:fXD

R:FXD

R~XD

R:fXD

5

R:fXD R:FXD R:fXD

5

R:f.XO;~LM

5

R:~XD

5

R:.FXO R:FXD R:fXD R:FXO R:FXD

10

.R:.FXD

R:FXD R:FXD R:FXD

R:f=XD' R:fXD·G.DMP

R:ifXD

R:FXO

R:fXD

10

R:fXD R:FXD

R:FXD R:FXD R:FXD R:fXD

R:fXD R:FXD

R:rXO

R:FXD

R:FXD R:FXD

R:FXD R:fXD R:fXD

R:FXD

Description

PNPISELECTfD NPNI

SELECTED NPN PtiPISELECTED NPNlSElECTED

PHP

PNPlSELEC~ED

NPNISElECTED NPN PNPISElECTEO

PNP PHPfSELECTEO NPNISELECTED NPN

PNPISElECTED NPMISELECTED PHP PNPISElECTED

flM

4.7K

OHM511i8W

COHP

1000 fLM MET

Flit CLMP

flM flM "ETflH

COMP

ELM

F.LM

COMP FLM

MET

GGMP COMP FLM

FlM

CDMP CCMP fLM

flM FLM

fLM flM ftM

lELM

MET.

MET.ELM-5--.11K MET MET

CD"P

COMP COMP GOMP CDMP

CDMP CDMP CQMP flM C..cMP

flH flM

ft~

fLM

MET MET'

COMP

CGHP

COMP COHP

OHM

10K

OHM

FlM

90.9

4.7K.OHM51IJ8W 1000

OHM

10K

OHM

2.2K

aHM

90.9

4.1~

~HM

1000

OHM

10K

OHM'5~

,flM

90.9

4.1K

OHM511l8W

1000

OHM511/4W

10K

OHM

,f.LK

90.9

1000

OHM51l/4W

1000

OHM

10K

OHM

10K

OHM51118W

62K

OHM511/4W

62KOHM

1.6K

OHM511/8W

41K

OHM

5.6K

OHM

2.2K

OHM

1.6K

OHM5111-8W

47K

OHM511/8W

5.6K

OHM

2.2K

OHM511/8W

FLM

5.11K

FLM

5.11K

FLM

5.11K

100

OHM

100

OHM OH14

100

OHH

100

OHM

3.3 'OHM

3.3

3.3~HM

3.3

OHM

1000

OHM

10K

OHM511t8W

62K

OHM

1.6KOHM51 47K

OHM511/8W

5.6K

OHM511/8W

2.2K,OHM

FLM

5.11K

FLM

5.11K

100

GHM511/4W

100

OHM511i4W

3.3

,OHM

3.3

~HM

fROM

2N3702)

FI\OM~3704)

fROM

2H3102)

fROM

2N3104)

fROM

2H3~02)

FROM

2N3104)

FROM

2H3102)

fROM

2N3T04)

FROM

2N3102)

FROM

2~3104)

fROM

2"'3702)

FROM

2N3104)

fRGM

2N3?02)

5~

1/4W

51

ll8W

OHM111.42W

51

1/4

..

51

1/8W

511/8W

OHM

11

1/2W

51

lA8W

51

1/4W

It8W

OHM

11 1l2W

51

lAaW

OHM

11

1/2W

51

1/4W

51

1/8

..

51

1/4W

51

1/8W

51

1/8W

51

1/8

..

51

1/8W

OHM

1% 1/2W

OHM

1%

OHM

1%

OHM

1%

51

lilt

..

1/4W

51

1/4

..

51

1/4

..

51

1/4W

51

1/4

..

51

1/4W

51

li4

..

51

1/4W

51

1/4

..

1/8

..

51

1/8W

OHM

1%

OHM

1%

51

1/4

..

51

1/4W

1!2W

1/2W

1/2W 1/2W

t~;1.

Mfr Code

28480 28480 80131 28480 28480

80131

28480

28480 80131 28480

28480 80131 28480 28480 80131

28480 28480 80131 28480 28480

01121

28480

01121

28480 28480

28480 28480 01121

28480

28480 01121 28480

28480 01121 01121

28480

28480 01121

01121 .28480 28480 28480

28480 28480 28480 28480 28480

284-80

28480

6it~2

01121 01121 01121 01121 01121

01121 01121 01121 28480 01121

28480 28480 28480 28480 28480

28480 01121 01121 01121 01121

Mfr

Part Number

1853-0020

1854-0011

2N3053 1853-0020

1854-0071

2N2904A 1853-0020 1854-0011 2N3053 1853-0020

1854-0011 2N2904A

18.53-0020 1854-0011 2N3053

1853~OO20

1854-0011 2N2904A

·1853-0020 0698-427,0

CB

1025

0698-.4218

0157-D191

0698-4270 CB

1025

0698-4218 0698-4262

0757-0191

0698-4270

CB

1025

0698-4278 0157-0191 0698-4210

C8

1025

0698-4218 0757-.0191

CB

1025

CB

1025

0698-4218

C8

6235

CB

6235 0698-4259 0698-4294

0698-4212

0698-4262

0698-4259

0698-4294

0698-4272

0698-.~~62

0757-0833 0757-08J3 015·7-&833

2,5lo~~33

1015

CB

1015

CB CB

1015

0335

CB

0335

C8

0335

CB

0335

CB C8

1025 0698-4218

CB

6235 0698-4259

0698-4294 0698-4212 0698-4262

0757-0833 0757-0833

C8

1015 C8

1015 CB

0335

C8

0335

~

See

introductiontothis

section

for

ordering

information

Model

8746B

Table 6-2. Replaceable Parts

Replace~ble

Parts

Reference Designation

A3R51

A3R58

A3R59

A3R60

A3R61

A3R62

A3R63

A3R64 A3R65 A3R66

A3R61

A3R68 A3R69 A3R10 A3R11

A3R72 A3R13 A3R14 A3R15 A3R16

A3R11 A3R18 A3R19 A3R80 A3R81

A3R82

A4 A40S1 A40S1 A40S2

A4DS2

A40S3 A40S3 A4054 A40S4

A4055 A4055

A40S6 A4056 A40S1

A4DS7

A40S8 A40S8 A4059 A40S9

A40S10 A40S10 A40S11 A40S11 A40S12

A4DS12

A4S1 A4S1

A4S1

A452

A4S2 A4S3

A4S3

A453

A454

A454 A454 A455 A455

A4S5

A4S6 A4S6 A456 A4S7

A4S7

A458

A4S8

A458

HP

Part Number

0683

...

1;025 0-683-1025 0698-4278 0698-4278 0683-6235

0683-6235 0698-425,9 0698-4294

06.98-4272 0698-4262

0698-4259

06.98-4294 0698'!'"4272 0698-4262

0757-0833

0757-0833 0757-0833 0'757-UH33

0683-1015 0683-1015

0683-1015 0683-1015 0683-03;5 0683-0335 9683-0335

0683-0335

08146-60053

1450-0356

0370-0768

1450-0356

0370-0768

1450-0356

0370-0768

1450-0356

0370-0768

1450-.0356

0370-0768

1450-0356

0370-0768

1450-0356

0370-0768

1450-0356

0370-0768

1450-0356

0370-0768

1450

....

0356

0370-0768

1450-0356

0370-0768

1450-035t

0370-0768

1460-1223 0370-0921

5'OOO-~400

1460-1223 0370-0921

5000-6401

1460-1223 0310-0921

5000-6402

1460.-1223 0370-0921 5:000-6403 1460-1223 0310-0921

5000-S611 1460-1223 Q310--C921 SOOO-S618 1460-1223

0310..,0921 5000-8619 1460-1223 0310-0921 5000-S6S0

Qty

12 12

12

R:FXD

COMP

R:,FXD·

CDMP

R:FXD

ELM

R:FXD

flM

R:fXD

COMP

R:fXD

CC~P

R:FXD

FlH

R:FXD

flM

R:fXO fLM R:fXD.;FLM

R:fXO

fl.M

R:fXO

FLM

R:FXD

Fl"

R:FXD

FLM

R:FXD

MET

R:FXD

COMP

R:fXD

COMP

R:FXD

CONP

R:fXD

COMP

R:fXD

COMP

R:FXD

ceMP

R:fXD

C~MP

R:FXO

COMP

BOARD

1

ASSY:SWITCH

LAMP:CLEAR

LENS:PUSHBUTIONJWHITE

LAHP:CLfARDOME

LENS:PUSHBUTTONJWHITE

LAMP:CLfAR LENS:RUSH8UTTONJWHITE LAKP:CLfAR

LENS:PUSH6UTTONJWHITE

LAHP:CLfAR

LENS.PUSHBUTTON,WHITE

LAHP:CLEARDOME

LENS:PUSHBUTTON,WHITE

LAMP:CLEAR

LENS:PUSHBUTTONJWHITE

LAMP:CLEAR

LENStPUSH8UTTON,WHITE

LAHP:ClEAR·OOME

LENS:PUSH8UTIONJWHITE

LAHP:CLEAR

LENS:PUSH8UTTONJWHITE

lAMP:ClEAR

LENS:PUSHBUTION,WHITE

LAMP:CLEARDOME.LENS

LENS:PUSHBUTTON,WHITE

SPRING:SWITCH PUSHBUIT.ON:SWITCH,

LA8EL:PUSHBU~~O~

SPRING:SWITCH PUSHBUTION:SWITCH,

LA8EL~USH8UTTON

SP.RING:SWITCH

PUSH8UTT~N:SWITCHt

lA8EL:P~SHBUTTON

SPRING:SWITCH PUSH8UTTnN:SWITCH,

LABEL:PUSHBUTTON" SPRING:S-WITCH PUSHBUTION:SWITCH,

LA8EL:PUSHBUTTON

SPRING:SWITCH

PUSHBUJTDN:SWITCH.

lABEl:PUSHBUTTON SPRING:SWITCH

PUSHBUTTON:S~ITCH.

LABEL:P.USHBUTTnN

SPRING:SWITCH

PUSHBUTtDN:SWITCH.

LABEL:PUSHBUTTON

1000

10K

62KOHM

62K

1.6K

47K

5.6KGHM.51

2.2K i.6K

41K

5.6K

2.2K

FLM

MET

FLM

MET

FLM

MET

FLM

100 100

100

3.3

DOME

DOME DOME

DOME

DGME

DOME. DCME

Description

OHM

51

1/4W

OHM

51

OHM

OHM·

LENS lENS

LENS LENS

LENS LENS LENS

LENS LENS

15111

IS12)

IS21)

(S22)

·0"

"10"

"20"

"30"

51 511/8W

51

PANEL

1/4W

1tBW

51

1/~W

51

1/4W

51

1/8W 1l8W

51

1/8

51,

1/8N

1/8

..

51

1/8N

51

118N

OHM1%1/2W OHM1%1/2W

OHM1%1/2W OHM"l%

51

lL4W

51

1/4W

51

1/4W

51

114M

51·

1/4

1L4N

51

1A4"

51

1/4

6.3V

OLIVE

OHM DHM

OHM

OHM511/aw

OHM

.~HM

DHM

OHM

5.11K

5.11K OHM

OHM OHM

OH"51 OHM

~HM

..

1/2W

..

BLACK

Mfr Code

01121 01121 28480 28480 01121

01121 28480 28480 28480 28480

28480 28480 28480 28480

28480 28480

28480 28'480

01121 01121

D1121

01121 01121 01121 01121

01121 28480 08806 28480 08806

28480

08806 28480 08806 28480

088D6

28480 08806 28480

08806

28480

08806 28480 08806

2848.0 08806

28480

08806 28480 08806

28480

28480 28480 28480 28480

28480 28480 28480 28480 28480

28480

284.80 28480 28480 28480

28480 28480 28480 28480 28480

Mfr

Part Number

CB

1025

CB

1025 0698-4278 0698-4278

CB

6235

CB

6235 0698-4259 0698-4294 0698-4212 0698-4262

0698-4259 0698-4294

0698~4212

0698-4262

0757-0833 0757-0833

CB

1015

CB

1015

CB

1015 CB

1015

C8

0335

C8

0335

CB

0335

CB

0335 08146-60053 7317

0370-0768

7371

0370-0768

1377

0370-0768 7377

0370-0768

7377

0370-0768

7311

0370-0768

7311

0370-0768

1311

0370-0768

1377

0370-0768

7377

0370-0768

1377

0370-0768

7317.;....

037U-07b8

1460-1223 0370-0921 5000-6400 1460-1223

0370-0921 5000-6401 1460-1223

0370-·0921

,

5000-6402 1460-1223

0370-0921 5000-6403

1460-1223

0310-0921 5000-8617

1460-1223 0310-0921 5000-8618 1460-1223

0370-.0921 5000-8619 1460-1223 0370-0921 5000-8680

See

introductiontothis

section

for

ordering

information

RepJ

aceableParts

Table 6-2. Replaceable Parts

Model

87468

Reference

Designation

A4SS A4S9 A4S9 A4S10 A4S10

A4S10 A4S11 A4S11 A4S11 A4S12

A4S12 A4S12

HP

Part Number

1460~1223

0310-0921

5000-8681 1460-1223 0370-0921

5000-8682

1460-1223

0310-0921

5000-8683 1460:-1223

0310..,0921 5000-8684

Qty

SP.RING:SWITCH

PUSH8UTT~N:SWITGHt

~A8EL:PUSH8UTTOM

1

SPRING:SWITCH PUSHBUTTDN:SWITCH.

LABEL:PUSHBUTl.ON

1

SPRING: PUSH8UTTOH:SWITCH. LABEL:PUSH8UTTOM

1

SPRING:SWITCH PUSHBUTIVN:SWITCH.

LA8EL:P~SH8UTTON

1

Description

SWITCH

OLIVE

"40·

OLIVE8LACK

"50·

'OLIVE

"60"

OLIVE

"70"

BLACK

8LACK

Mfr Code

28480 28480 2848'0 28480 28480

28480 28480 28480 28480 28480

28480 28480

Mfr

Part Number

1460-1223 0310-0921 5000-8681

1460-12·23

0310-09·21 5000-8682

1460-1223 0370-0921 5000-8683

1460-1223

031o-0e.t21 5000-8684

See

introductiontothis

section

for

ordering

.:\.;-

information

Model

87468

Table 6-2. R'eplaceable Parts

Replaceable

Parts

Reference

Designation

HP

Part Number

Qty

Description

Mfr Code

Mfr

Part Number

ASRI

16

11

LINE

A5

1

2

3 4

8

9

10

J.1 12

13 14

15

16

17 i8

19

20

08746-60008

0310-1111 08140-20Cj2 08141",,2,004

08142~2001

3030-()O60

OSIQ-tOOC5 08741-2tl24

08741~6001

3030-0022 08141-2022

0520-0003

2190-0014

1410-:016S

2520-0001

2360-0004

30'CHOI00 08140-C005

1430-0356

5020-03S2

5020-0233

3030-0001 624S-SCiC-S

1460-001Ci

0510-0053

1140-0008

1140-0001

1140-0009

1480-0012

1430-0035 01140-21014

08614-295

3030-0033 Q.8742-200B

OS143~60014

1

2

i

1

1 1

1

1 1

2

1

2

1

1 1 SHAFT:

1

2

STRETCHER

KNOB

ASSY ASAPTER:SttAFT BEARING:P.INION GEAR:PINIQN SCREW:SET

RING:RETAINUIG DRIVE

SHAFT

LEAD

SC.REW SCREW:SEI LEAD'

SCREW·

SCREW:SS~,RH

WASHER~K

BEARING:8ALlFLANGEO SINGLE

SCRE"~NDHO

SCRE'URNDHOSLOT·'DR6-32X0"'312" wASHER:fLATFOR

.WASHER:SHUI

GEAR:BEVEL

"ASHER~SPRING

COLLAR SC.REW:MACHIHE

BUSHINCi SPRINGzCOMPRESSION RING:RETAINING WHEELtlDNE

NUMBERWH~&l:CGUNtERRnlATING

UNIT

;WHEEL:COUNtER PIN:ROLl GEAR:PlhIO"22PITCH 8 tEETH

IDLER

THUMB·

'WHE6L SCREW:SET SHAFT:G.OUNTER RESISTOR ASSY:lUNABLE

ASSY

GEAR

2-S6X0.062"

ASSY

6-32X0.125"

HOUSING,BUSHING

2-56

X3J

.2HWD

.6

CUP-PJSI

FOR

8

SCRIW

0.188MOlA

ROTATING

.315

X·3/16

10DB

fOR

SLOTOR8-32X0.250"

CLUTCH

48·

PilCH,36TOOTH

SET·

DIGIT

.062

OlA·X

6-32

SST

LCi

LG

lG

ROW

.8-32X3l16

SHAFT

LG lG

28480

28480 28480 28480 00080

19136 28480 281t80 00000

28480

28480 281t80 21335 00000 00080

80000

28480

11041

28480 28480

70276

28480 00000 79136 19811

18911 18911

12962

18911 28480

28480

284BO

28480 28480

08746-60008

0370-1111

08740-2092 08141-2004 08742-2001 OBo

5100-25-S-"0 08741-2024 0871t1-4001 OBO

08741-2022

OS20-0003 2190-0014

f4DO~fSS9069

aBO

OBO

aBO 0811tO-0005

G419Y-G

5020-0392 5020-0233

OBD' 6248-59C-5 aBO 5555-18-5-"0 CC-2391-EIlRR-WH

CC-2391-.NRIl-WH

CC-2365-UNRR-~WH

92-012-062-0375 8B-2219 08140-2014

08614-295 3030-0033 08742-2008 08743-60014

See

introductiontothis

section

for

ordering

information

6-9

Replaceable

Parts

Table 6-2. Replaceable Parts

Model

87468

Reference Designation

A6 A6 A1

A1S1

A752 A7S3

A8 A8-51 A852 A8·53

A9 A9

A9

A9Cl

A,B

A9,2

DCl

DC1 DCl DC1

OCIC1

DCICl OC1C2 DCIC3 DC1C4

DC1CS OC1C6 DC1C7

DCIC8 DC1C9 DC1Ll

AND

bC1Rl

DCIRl OC1R2

DC1R3 DC2

DC2

oe2

DC2 DC2el

DC2C2 DC2C3 DC2C4 DC2C5 DC2C6

DC2C7 DC2C8 DC2C9 De2Ll DC2L2

DC2Rl DC2Rl DC2R2 DC2R3

DC3

L2

HP

Part Number

08146-60003 08746;;'60010 08746-60004 U143-60010

08''l43~60009

08143-60011

08146~60004

0114"9<-60010

08143'~6000CJ

08143"'-60011

Qty

1

2

2 2

2

08746"'60009 1

1124-113;8 112lft-1739 0160-3043

0150-0052

08146~60001

08746-60007

08745-6008

0180-.2210 0180-221t0 'C:fXD-

0180-2210 0180-221.0

Oa743~60014

068~lOSS

0683-W)S5

1 1 1

1

2 2

2 8

4 2 RESISlOR

4

08146-60001 08146-60007 08745-6008 0180-2210

0180-2210

0180-2210 0180-2210

08743-60014 0683-1055

0683-1055 08746-60002

1

Description

SIEP

·AI1ENUAToa.tNEW)

~E~~.I.i.T

s..lTCH '1REf RELAY RELAY

RELAY~aSSy;:

S.,IT-&H:' REl.AY RaAY

REilAYlASSY~

POMEIl.'

LA8EL:115V-230V C:fiXOCER 2

C:F.XO·GeR COUPLER FOR CGUPLER FOR

C-:'=XDI500 NOT C.:fXD

NOT'IIELa'REPLACEABlE

NOT

C:

<C:FXO

NOJ.,FIElD

HOT

NOT

HOT-IN A:FXO A:;fXDOO,.P ·1

COUPLER fOR COUPLER

fU

C:FXD NO. C:FXD C:FXD NOT NOT C:FXD

C:FXD NOT

NOT

NOT RE5I5TOR

NOTINOPTION R:FXD R:FXD

COUPLER

08/46-60903

ASSY

(PORT

,•.$

S-V:

(CENTER)

.,ASSY:

(PORT

TREE

'ASSY

,ASSY':

(PORT

-ASSY:

(CENTER) (PORT

LINE

MODULE

LABEL:

115

~U5E·IA-230

X·0.005

0.05UF20%

ASSY:PORT

STANDARD OPTION

FIElD.REPLA£EABLE

:fIaD·.REPLA&UB~E

FXO

·:FULD FIELD

STANDAR5M&OEL

OPIIONOO2

FIgLD

FIELD

FIELD FIELD FIELD

MODEL

ASSY:'ORT

002

PF

ELECT

·2·~U&:·

ELEC12UF.+'G-IOS

ELECTi2 ELE£T2

CDMP·l

UF

4JF

REPLACEABLE

ASSYITUNABLE

'OPTUlN

002

MEGOHM.·5&114M

,,.EGOItM

AS5Y:PORT ASSY:.P.ORT

1500

PF

REPLACEABLE ELECT2UF ELECT2UF

REPLACEABLE

REPLACEABLE ELECT2UF

ELECT2UF

REPLACEABLE

A55Y:TUNABLE

002

1

MEGOHM

CaMP COMP1MEGOHM

A5SY:REFERENCE

2)

1)

lSSY

±10%

·+50-10a

+50~

+'O-10a·

+50-10% +50-10%

+50-10%

REQU'IRE5

1)

2)

FU5E

110VA

UF:201

400VDCW

AND

tCPl-.10N

lSOVOGW

150VDCW

101'

150VOCW 150VOCW

1008

sa,

1/4

..

'ANDOPYiOM

150VDCW 150VDCW

10DB

·5%

1/4W 1/4W

5%

EXCHANG-E

500UA MAX 250YAC

001

~r:.'f;.

Mfr

Code

28480 28480 28480 284:80 08143".-60010 28480

28480 28480 284&0 28480 28488

28480 28480

2848. 56289

56289

28480 28480

28480

2848.

28480

28~0

28480

284.80

01121 01121

28480

28480 28480

28480

28480 28480

28480 01121

01121 28480

Mfr

Part

08146-60003 08746-60018 08746-60004

o

8143-60eoe

0874'3-60'01"1 . o814ft6-60004 08143-60010 o

814'3W

600D9

08143-600'·11 08746-600.

7124-1738

11~1139

29C141A-CDH 33C17A

08746

...

6004»1

08146-60001

08745-6008 0180-2210

OUJ~2210

0180-2210

018~2210

08'143-60014

C8

1055

C8

1055

08746-60001

08146-600.'

0874?-6008

.

0180-2210 0180-2210

.:

08743-60014 CB

1055

CB

1055

08746-60002

Number

v

See

introductiontothis

section

for

ordering

information

Model

8746B

Table 6-2. Replaceable Parts

Replaceable

Parts

Reference Designation

Cl C2

C3

C4

051

fl

Fl Fl Fl F2

F3

f4

f5 Jl J2

J3 J4 JS J6

R1 51 51

II

WI

W2

W3

WLt

W5A WSA

W58

W6

W7 W8

W9A

W9B

W9

WIO

Wl1

W12

HP

Part Number

0180-0204

2140-0244 2-110-0001

211~OO12

2110-0.012

2110-0012

2110-0012 1251-0.112 1251-0194

1251..0160 1251-0233 1251-QI5C3 1

12S1-00S5

0698-3162 3101-1395 2140-0244

9100-3136 08746-20014 11604-20021

08746-.ao015 08746-20017

08746-20018

08746-20024

08746-20016

08746-20019 08146-2(}021 1

08746-ln023

08146-210025

08746-20022

08146-20020 8120-1348

0310-0919

0310-09~O

5·000-C051

SOOo-0136 2

SOO~0137

5060-0228

5060-0166

5060-0761

08143-00004 08143-00005

08146-00005 08146-C'0006 1 08146-00007 08146-20008

08146-,,0013

08146;"'OOOOS

08146-f60006

Qty

NOT NOT

C~XD

2

C~XD

l~P:GlOW

2

FUSE:l

1

t115V LINE)

5 FUSE:O.5

t230V .I.IItE)

FUSE:0.5 FUSE:0.5AJ4P

Fuse:O.5 FUSE:O.5".

CONNECTQa~PRINTEOCIRC~IT

1

CQN.EC~R~PRINTED

1 1

CCNNE~IOR:15

1 CONNECtoR:PC

CONNeCl0R~2XI5CDNTACT

CONNEClORaf=EMALE

1 1

R:FXD

SWITCH:pUSHBUTTQN

1

LAMP:GLOW,

TRAMSFQ.RHER:--115/230V

1

CABLE:CDUPtER/REAR·PANEL

1

REFERENCE·,LUtE/COAX

1

CA8LE:REAR

1

CA8L.f:O£UPLfa/ATIENUAT~R

1

CABlE:ATIENUATORISW

1

FOR CABLE:ATTENUATORISW

1

TOSWTREE

.CABLE:lINE

1

CABlE:SW TREe CA8LE:MAIN CA8LE:SW

1

FOR

CABLE:$:W

1

TSSWTREEAOPT £ABLE:.AIH

1

CABLE:SW

1

CABLE:

1

PU5HBUTTON:END

-4

FUSHBUTTON:END

4

TRIM

2

COVER:REAR

2

COVER:FRONI COVER

1

HANDLE.

2

FOOT

5

COVER

1

COVER:TOP.;REAR·COJUfER

1

PANEl.:REAR

1

PANEL:F..RONT,

PANEL

I

PANEL

1

2

FRAMfi:SIOE WiRING

1

WIRINGHARNESS:LOGIC

1

Description

ASSIGNED ASSIGNED

ELECT

2800·

ELECT

2800

MINIATURE

AMP

AMP AMP

Pl~

Itlt

MET

FLM

46.4K

NEON

P~NEL/lINE

STANDARD

ASSY:EM

IMSTRU"ENT

B(OPT 001 STRETCHER/REF.EREHCE

"'"/AUX

.LINE

TREE·"8"tlEST·PORT

INSTRUMENT

TREE

"A·/TEST~PORT

LINE~DC2"/SW

TRES.

POWER

ST:.RIP

ASSY:BOTTOM

"A"/AUX."Oe2"

MISCELLANEOUS

510£

sloe

ASSY:RETAINER

ASSY:TQP

UPPER

:JfRONl,

LOWER

JtFRDNT

HARNESS:POWER

UF+IOO~10140VDCW

Uf,+lOQ-IOI

95V

CIRC~ll

~OVDCW

22-CONN 15-CONTACT

CONTACTS

36-PINMINAT

OHM1%1/8W

DPDT

(LINE)

At

PATCH

LINE

CABLE

StRETCHER

TREE

"A"

TREE

"S"

AND

"SCI-/SW'REE

001

AND

LH,

CAP~

CAP,

RH~

002)

OPT

"DCI"

8 28480

OPT

002

lREE 8 28480

BLACK

Ol-IVE

BLAcr

OLIVE

5 X 16

5 x

16

~!-'

Mfr Code

56289 56289 D37691t 87031t

15915 75915 75915 75915

15915 15915 28480 28480

281t80 125"1-0160 28480 28480 284·88

2848.0

.768.5~

87034

.28480

28480 28480

28480

284.ao 28480

28480

28480 28480

28480

28480 28480

28480 28ltaO 281t80 28480

28480 28ltBO 28480 28480 281t80

28480 28480 281t8'Q 28480 28480

284:80 o 28480 28480

Mfr

Part Number

D31694DFP AIH 31200-1.

312.500

312.508

312.500

312.5·00

312.5.00 1251-0172 1251-0194

1251-0233 1251-01519 1251-0085

0698-31~2

53-67280-121/AIH AIH 9100-3136 08146-20.0 lit 11604-20021

08146-20015 08746-20017 08746-20018

08746-20024

087%-20016 08746-20019 08746-20021 o871t6-200

08146-20025 08746-20022

08146-20028 8120-1348

0310-0919

031~O920

5000-0851 5000-.0136

5000-0737 5060-0228 5060-0166 5060-0767 08743-00004

08743-00005 08146-00.005 08746-00006 08146-00001 08746-2000.

8146-2.0DI3

08146-60005 08746-60006

DFP

2,3

":L--

See

introductiontothis

section

for

ordering

information

Replaceable

Parts

Model

87468

MFR NO.

00000 01121 04713 07263

08806

19611

21335

28.480 56289 10276 71041 72962

15915

76854

79136

80131

81034 91418

MANUFACTURER

U.S.A.

COMMON

ALLEN

BRADLEY MOTOROLA FAIRCHILD G.E.

DURANT FAFNIR HEWLETT-PACKARD SPRAGUE ALLEN BOSTON ELASTIC LITTELFUSE INC.

OAK

WALOES

'ELECTRONIC

MARCO&OAK

RADIO

SEMICONDUCTOR

CAMERA

CO.

MINIATURE

MfG. BEARING

ELECTRIC

MFG.

co.

GEAR

STOP

MFG.

CO.

KOHINOQR

INDUSTRIES

MATERIALS

co.

WORKS

OIV.

INDUSTRIES

CO.

& INST.

LAMP

CO.

THE

COMPANY

CC.

DIVN.AMERICAN

NUT

DIV.

AMERACE

OAK

ELECTR01NETICS

INC.

ASSOCIATION

co.

Table 6-3. Code

NAME

PROD.

INC.

CORP.

SEMICONDUCTOR

DEPT.

DIV.

TEXTRON

OAK

INC.

ROCKWELL

ESNA

CORP.

ELECTRO/NETICS

ListofManufacturers

DIV.

CORP.

ADDRESS

ANY

SUPPLIEROFU.S.A. MILWAUKEE, PHOENIX, MOUNTAIN CLEVELANO,

MILWAUKEE,

NEr BRITAIN,

PALO

N. HARTFORD, QUINCY, UNION,

OES

CRYSTAL LONG WAS'f'UHGTON ANAHEIM. CHICAGO,

ALTO,

ADAMS,

N.J.

PLAINES,

IS.

ARIZ. VIEW,

OHIO WIS.

CALIF. MASS. CONN.

MASS.

LAKE,

CITY, N.Y.

D.C.

CALIF.

ILL.

WIS.

CALIF.

CONN.

ILL.

ZIP

CODE

53204 85008

94040

44112

53201 06050 94304 01247 06101 02111

01083

60016 60014

11101

20006

92803

60646

Model

8746B

Replaceable

Parts

4

5

6

7

12

Reference

Designation

1

2

3

4

5

6

7

8

9

10 11

12 13

14 15

16 17 18

HP

Part

RefertoFigure

08745-2028 08743-00004 08746-00005 08746-00007 08746-00004 08743-00008 08743-00005 08746-

20013 5060-0222 5060-0766

2550-0016 5000-0736 2370-0020

55000-0737

5060-0767 5000-0051

5060-0228 1490-0030

5060-0775

Number 6-2,

8746B

Front

Panel

Assembly

BRACE: COVER

PANEL:

FILLER

SUB

FILLER COVER: FRAME: HANDLE RETAINER: SCREW: REAR SCREW: FRONT FOOT PLATE: BOTTOM STAND:

KIT:

Figure 6-1. Cabinet Parts

TOP

ASSY:

TOP

REAR

PIECE:

DECK

PIECE:

SIDE

ASSEMBLY

RACK

SIDE

TOP

REAR

S~DE

ASSEMBLY

HANDLE

SSTBH8-32

COVER

SSTFHPHLOR6-32

COVER

FLUTED

COVER

TILT

ALUMINUM

ASSEMBLY

MOUNT

Description

FRAME

CORNER

ASSEMBLY

X 5/16"

X3/16"

6-13

Replaceable Parts

3

Model 8746B

4

Reference

2

Designator

1

2

3

4

5

6

7

8

9

10

11

12

13

HP

Part

Number

5040-0328 08746-00001 08746-00006 08745-20008 08742-2036 08746-20006

1250-0819

1250-0820 0370-0920 0370-0921 0370-0802

5000-6400

5000-6401

5000-6402

5000-6403

5000-8677

5000-8678

5000:-8679

5000-8680 5000-8681 5000-8682 5000-8683 5000-8684 0370-0919

Description

BEZEL: PANEL PANEL PANEL LOCK CONNECTOR COUPLING COUPLING PUSHBUTTON PUSHBUTTON: LENS: LABEL:.PUSHBUTTON LABEL: LABEL: LABEL: LABEL: LABEL: LABEL:

LABEL: LABEL: LABEL: LABEL: LABEL:

PUSHBUTTON

REFERENCE FRONT: FRONT: FRONT

RING

PUSHBUTTON

PUSHBUTTON PUSHBUTTON PUSHBUTTON PUSHBUTTON

PUSHBUTTON

LOWER

UPPER

(BACKING

MOUNT: NUT SLEEVE

END

SWITCH

END

ASSEMBLY

CAP:

PLANE

PLATE)

SLIDING

RIGHT

(12)

("S11")

("S12") ("S21")

(IIS

22

("0") ("10") ("20") ("30")

("40") ("50") ("60") ("70")

LEFT

5

EXTENSION

(4)

")

(4)

6-14

Figure 6-2.

Front

Panel

Assembly

Model 8746B

2 3

Replaceable Parts

PANEL

10

4

5

.

~

Reference

Designator

1

2

3

4

5 6 7

8

9

10

~SEAT

OUTER

CONDUCTOR CAREFULLY TO10FT-POUNDS

AND

TIGHTEN TORGUE

HP

Part

5000-8676 5020-7803 5020-7806 5020-7805 2950-0079 2190-0493

08741-2010

5040-0306 1250-0816

08745-2047

Number

WASHER

NUT:

CLAMP

FERRULE CABLE: NUT:

WASHER:

CENTER BEAD HOLDER: CONNECTOR

TERMINATOR

HEX

5/8-24

FLAT

CONDUCTOR:

CONTACT

Description

FOR

BODY:

THREAD

5/8" DIA

TERMINATOR

SST

SHAFT

Figure 6-3.

REFERENCE&TEST

Channel

Output

and Inboard

(W3Jl)

REFERENCE

LINE

Connectors

6-15

Replaceable Parts

Model

8746B

Reference

---{~;

Designatio

, 1

2

3

4 5

6 7

8

9

n

2

3 4 5

HP

Part

Number

5000-8676 0590-0035

08745-2021

29~0-0079

2190-0493

08741-2010

5040-0306 1250-0816 08745-2047

PANEL

6 7 8 9

Description

WASHER NUT:

CLAMP CABLE: NUT: WASHER: CENTER

,

BEAD CONTACT:

CONNECTOR

TERMINATOR

HEX

5/8-24

FLAT

CONDUCTOR:

HOLDER

BODY

THREAD

FOR

5/8"

DIA

SHAFT

TERMINATOR

6-16

Figure 6-4. Outboard

(W1Jl)

REFERENCE

LINE

Connector

Model 8746B

Replaceable Parts

~~.

Reference

---~

Designation

1

2

3

4

5 6

7

8 9

p-

5

3

2

4

6

7

8 9

\

i-

\

0

HP

Part

Number

5000-8676 0590-0035 0510-0055 5020-7805 2950-0079 2190-0493 08741-2010 5040-0306

1250-0816 11604-20019 11604-20020

WASHER NUT:

RING: TERMINATOR: NUT: WASHER: CENTER BEAD HOLDER:

COUPLING

CONNECTOR

~

Description

CLAMP

TRUARC

HEX

5/8-24" FLAT

CONDUCTOR:

CONTACT

SHELL:

BODY:

CABLE

THREAD

FOR

5/8" DIA

TERMINATOR

CONNECTOR

SST

SHAFT

•

Figure 6-5.

REFERENCE

LINE

Coaxial Cable Connectors (2)

6-17/6-18

Model 8746B

Manual Changes

SECTION

MANUAL

7-1. INTRODUCTION

7-2.

To

adapt serial numbers prefixed 983-, make indicated below.

Serial

-

PrefixorNumber

983- 1

-,....-..

Make

Manual

CHANGE 1

For

serial prefix 983- itisrecommended A2Q22: 1854-0062 with heat dissipator 1205-0048. A2R54 and A2R55: 0764-0013 R:FXD MET

this manual

Changes

SERVICE NOTE

that

A2Q22, A2R54, and A2R55 be replaced with the following parts:

OX56OHMS

CHANGES

to

_

-

Serial

VII

instruments

the

PrefixorNumber

2W

5%.

with

changes

__

Make

Manual

Changes_

to

The following Manual Changes are Page 6-4, Table

Change A2Q22 Page

6-5, Table 6-2 Replaceable Parts:

Change A2R54 and A2R55 Page 6-6, Table 6-2 Replaceable Parts:

Change A3R32, 33, 3"5,51 and 52 Recommended replacement for these resistors is: 0757-0833 R: FXD MET FLM 5110

Page 6-7, Table 6-2 Replaceable Parts: Change A3R71 and A3R72 to 0686-5125 R:FXD Recommended replacement for these resistors is: 0757-0833 R:FXD MET FLM 5110

Page

8-20, Service Sheet 2, A3 Driver Assembly;

Change A3R32, 33, 34, and Page

8-24, Service Sheet 4:

Change A3R51, 52, 71, Page

8-28, Service Sheet 6:

Change A2Q22 to 1854-0039.

6-2

Replaceable Parts:

to

1854-0039 TSTR:SI

to

35

72,

73 and 74 to 5100 ohms.

document the parts originally installed in the instrument:

NPN

80131 2N3053 with 1205-0062 HEAT DISSIPATOR.

0698-3260 R:FXD MET OX 100

to

0686-5125 R:FXD DEPC 5100

DEPC

to 5100 ohms.

OHM

28480 0698-3260.

OHM5%1/2W 01121 5125. .

5100

OHM5%1/2W 01121 5125.

:v

OHM1%1/2W.

I.'

I

7-1/7-2

Model

8746B

Service

8-1.INTR.ODUCTION

8-2. This

troubleshooting,

S-Parameter

section

Test

provides

and

repairing

Set.

instructions

the

Model

for

8-3. PRINCIPLES OF OPERATION

8-4. General principlesofoperation on

the

first

fold-out diagram. This index. to

Service Service

Service Service Service Service

8-5. Detailed circuit schematic diagram is placedonthe foldout material

.in

function

Larger numerals-

Service Sheets as follows:

Sheet

Driver Circuits

Sheet

Circuits

Sheet

cuits

Sheet

Circuits

Sheet

cludes

Remote

page

needed

one

place, providing easy

and

block

1 consistsofRF

2 consistsofS-Parameter

3 consists 4 consistsofAttenuator 5 consistsofRemote

6 consists

on

each Service Sheet. This places all

specific

sheet,

diagram also serves as

on

Control

description

for

printed-circuit-Ievel diagnosis

circuitry.

opposite

the

Circuits

of

Power

Power Supply).

correlation

are described

block

diagram refer

Latch

Attenuation

Driver Cir-

Control

Supplies (in-

for

each

facing left-hand

8-6. RECOMMENDED TEST EQUIPMENT

SECTION

SERVICE

testing,

8746B

the

block

an

and

Latch

Logic

individual

between

VIII

8-8.

The

schematic

sent

the

circuits electrically.

diagrams, tical.

8-9. flow; blies diagram. ceded _by.P notation

assembly

8-10.

from

Notes the about are given

8-11. As blies

labelled the gram.

though

The

circuits are arranged accordingtosignal consequently, may

be

If

so,

/0,

of

the

has

been

Someofthe

the

schematic

and

explanationsofsymbols

diagrams are

specific

all

the

an

aidtofinding

in

the

setofdiagrams,

Reference

reference

designations appearing

8-12. COMPONENT TROUBLE ISOLATION

8-13.

The

following

making voltage

diagramsinthis

They

wire colors are given

some

switch

shown for

components,

diagramtowhich

and

in

the

reference

"Part

Of",

number

divided.

general diagrams is

contained

Designations

information

resistance

part

and

of

parts

information

in

circuits,orconditions

components

each

measurements.

section

are

not

where

and

circuit

on

more

than

designation is

is followedbya

into

which

obtainable

showninTable

pertainingtoall

Table

diagram

that

is giventoaid

they

8-2. Notes

apply.

and

hasabox

contains

on

the

repre-

wiring

prac-

assem-

one

pre

the

8-2.

assem-

all

dia-'

in

..

8-7.

Test

equipment maintain Other meets Specifications" column. listed

the

Model

equipment

the

specifications listed'

in

Table 8-1 Servicing Aids.

8746B

may

and

accessories required

are listedinTable 1-3.

be

substituted,

in

the

Other

servicing aids are

provided

Table 8-1 Servicing

ITEM HP

22-pin

15-pin

Spanner Wrench (permits disassemblyofAPC-7

Bulb

Service Board (permits

Extender Extender

Extractor

bulb

replacement)

Board (permits making voltage measurementsonboard Board (permits making voltage measurementsonboard

Tool

(permits easy

remote

pushbutton

programming w/clip leads

to

it

"Critical

lens

type

and

8-14. Leads circuit emitter

on

marked

the

boards

lead is

the

printed-circuit

on

standard

Aids

connectors)

pushbutton

for

testing

of

most

areina

identifiedbyan

the

schematic

light

purposes)

triangular

board.

printed-circuit

A2) AI)

transistors

configuration.

E alongside

Polarityofdiodes

board

symbol.

PART

(PartofModel

Connector

08620-60037

on

the

printed

the

by

means

numbersofthe

NUMBER 5060-0630 5060-0049 5060-0237

11587

Kit)

4040-0427

The

lead

is

of

A

8-1

Service

Model

8746B

•

..

Table 8-2. Schematic Diagram

SCHEMATIC DIAGRAM NOTES

Resistance isinohms P/0:;::

part

of.

*Asterisk

maybeomittedorresistors

Screwdriver

Encloses

Circuit assembly borderline. Other Heavy line

-.

Heavy dashed line

denotes

adjustment.

front

panel

assembly borderline.

with

and

capacitance isinmicrofarads unless'

a factory-selected value. Value

jumpered.

designations.

arrows indicates

with

arrows indicates

path

Notes

o

r---,

L..

..J

and

directionofmain

path

and

'-f<

shown

Encloses

directionofmain

otherwise

is typical. Capacitors

Panel

control

rear

panel

signal.

noted.

.

designations.

feedback.

®

Numerator

Denominator

Wiper moves or

knob.

Numbersinstarsoncircuit assemblies

text. Encloses wire

color code. stripe,

white

base, yellow wide stripe, violet

Tiepoint

Voltage regulator

Feed-through capacitor

frequency

Dual

entry

non-selected

Symbol indicates a Symbol Symbol Symbol

toward

color

First

number

and

the

third

(connects

(breakdown

signalstochassis).

voltage value.

condition.

with

A indicates

with

B indicates

with

C indicates

CW

with

clockwise

code.

twoormore

common

Code

identifies

number

identifies

diode).

(shunt

See paragraph 8-67

capacitor,

Numerator

circuit

common remote remote

used (MIL-STD-681) is

schematics).

return, operation operation

rotationofcontrolasviewed

show

locationsoftest

the

base color,

the

narrower

narrow

commonly

indicates selected

for

point.

NOT GROUND.

+11V source. +5V source.

stripe.

further

second

stripe, e.g.

used

for

condition, explanation.

number

from

points,

same as

calledTPin

the

wider

(947)

bypassing high-

denominator

shaft

resistor

denotes

8-2

Model 8746B'

Service

'I

microcircuits are Service i.e. A1TP1istest

in

8-15. When making voltage measurements,

that

GROUND. This black

MANUAL switch

8-16. When making

transistorsdonot

over

nor

circuit

8-17. ASSEMBLY 8-18. Pushbutton

8-19. follows:

follows:

Sheet

assembly A1.

they

are referencedtoa

wire, such as

1.5

volts open-circuitvoltageonthe

that

draws

current.

T<\

replace a

a. Remove b.

Remove

1.

showninan

5·.

Test

points

point

canbefoundatany

on

82. ohmmeter

useanohmmeter

more

than

REPLACEMENT

Circuit

pushbutton

the

top

A1,

the

Remo,ve holding regulator

ket).

the

heat

outline

are labelledTPin

1 (1 in a

the

staronschematic)

common

rear-panel REMOTE/

measurements

range

1 milliampere

Boards

board,

cover.

power

supply

two

posi-drive screws

power

sink

supply's

(mounting

drawing

point,

that

test

of

proceed

board,

on

text,

note

NOT

white-

on

has

leads

short-

as

series

brac-

e. Install electrolytic

bracket.

f..

Install

8-20.

8-21.

coaxial switches. individually.. PartsinSectionVIfor switch

each

REFERENCE

Directional firmly tor ing

Switch

ing Switch Tree Atoits

through

Switch

proceed

a.

Remove

b.

Remove

end

c.

Disconnect

holding

withapairofplastic-jawed pliers, while loosen-

the

31t"

d.

Disconnect

Tree

e.

Remove

f.

Remove

the

power

Tree A

Tree A consistsofthree

Refer

as follows:

and

one

channel

Coupler

the

brass

A, using a

bottomofthe

supply

Each

to

part

top

and

top

cross-brace

each

screw above

connectors).

cable W7 (see

DC 1

coupler's

nut

..

cables W5

3A"

the

two

Switch

capacitor

circuit

switch

the

Table numbers.

bottom

(PORT

stainless steel connec-

open-end

socket-head

mounting

Tree instrument.

board.

may

be

of

Replaceable

To

covers

(one

the

Schematic1)at

1 coupler)

and

wrench.

screws

bracket.

A

and

mounting

microwave

..

screw

TEST

W11

cable W7

replaced

replace a

on

and

by

from

hold-

2. Remove sink as a

connector).

3.

Remove mounting. three

outofthe

c. Remove

pushbutton

d.

from To

install

a. Install light bulbs b.

its

socket

bulbs showing

c. Insert

screws

into

the

d.

circuit

Remove

the

instrument

the

Pushbutton

Insert

through

pushbutton

Tighten circuit

the

and

through

the

circuit

unit

the

electrolytic

bracket

screws

the

boardtothe

the

replacement

position

the

circuit

and

way.

eight screws holding

pushbutton

and

disconnect

Circuit Board:

into

circuit board

the

front

eight circuit-board

board.

end-piece

board

(unplug

move

..

mounting

from

by

removing the

push

buttons.

circuit board" A4

from

replacement

circuit

panel.

Start

and

heat

chassis

capacitor

the

ca'pacitors

the

A4

socket.

board.

board

each screw

into

with

light

mounting

screws.

g.

Disconnect

one

white-green (white-blueonOption

wire

from

Switch

h.

Disconnect

i.

Replace defective

To

install Switch

Insert

a.

the

instrument

surfaceofthe

instrument

closest viewed

endisconcentric. Clean cablestoswitch-tree finger-tight.

screws.

DCI's at

to

from

b.

c..

d.

stainless-steel

DC1.

switches is closesttothe

and

the

Make sure coaxial cable

Install

Tighten all cable

the

Tree

cable W7

Tree

the

replacement

from

the

left

side

front.

the

connector

two

white-black wires

A

..

switch

A:

the

bottom

switch-tree's single

of

the

with

two

switch-tree

connections..Firmly

from

Switch Tree

..

switch

so

instrument,

center

methanol.

when

tightening

and

001or002)

tree

into

that

the

flat

frontofthe

port

when

conductor

Connect

mounting

hold

A.

is

W7

8-3

Service

Model 8746B

e.

001

and

tree

terminals f. Install

Solder

002)

white-green (white-blueonOptions

and

two

white-black wirestoswitch-

with

same

color

wires attache-d.

the

top

cross-brace.

g. Install covers.

8-22. Switch-Tree B

8-23.· Switch Tree B consistsofthree coaxial switches. Each switch individually. Refer PartsinSection VI switch

proceed a. Remove b.

Remove

each

end

and

one

REFERENCE

to

the

for

part

as follows:

top

and

bottom

top

cross-brace

screw each above

channel connectors).

. c. Disconnect cables

and

WIO

from

Switch Tree B (cables

to

DCI

and

go

d.

tors, disassemble

REFERENCE

DC2, respectively).

To~btain

·access

LINE

1.

Loosen cable

using a

W3Jl

connector)

1/2"

open-end wrench.

2. Partially unscrew cable from

connector

open-end wrench.

may

Table

of

numbers.Toreplace a

covers.

(one

the

W8

(see Schematic

to

switch

(inboard

as follows:

terminator

body

using a

microwave

be

replaced

Replaceable

screw

TEST

and

W8

and

W10

tree

connec-

rear-panel

lock-nut

terminator

7/16"

on

1)

g. Loosen

the

three accessible screw

out

switchesinSwitch Tree B. 'This screw

from

as faraspossible and remove spacer from

the

single screw located between

the

topofthe

screw.

h.

Remove

to

Tree B

of

the

blue the

its

i.

Remove''Switch Tree B

instrument.

j.

Disconnect

(white-green

switch tree.

k. Replace

To

install Switch Tree B:

a. Install

the

flat sideofthe

of

side front, the

the

and

rear panel.

b.

Install spacer

switches. Do

the

mounting

~tjt.

on

the

instrument,

the

single

not

the

defective switch.

replacement

switches is closesttothe

tighten screw.

c. Make sure coaxial cable endsofcables ends

with

W8.

methanol.

and W10 are concentric. Clean

Connect

finger-tight.

d.

Install

and

tighten swit.ch-tree

screws.

instrument.

Push the

allen-screws holding .Switch

plate.

from

the

bottom

white-black

Options

001

switch

and

·and

002)

treesothat

white-

from

right

when viewed

portofthe

and

screw located

tree

center

from

is closest

between

conductor

the

cablestoswitch-tree

mounting

is

to

e.

cable

W9

f.

connect then

from

8-4

3. Remove to

rear

nut panel using

wrench.

4.

Push cable

unscrew

inator.

5. Remove

ator,

from

For

standard

bead

and

cable.

as follows:

1.

Disassemble using

step

above.

2. Disconnect

For cable

8746B

W5

options

from A6 (step

Switch Tree B.

securing

connector

3/4"

through

connector

rear

body

assembly, cable termin-

outer

model

TEST

conductor

8746B,

output

d substeps 1

W9

from

Switch Tree

001

and

attenuator)

body

open-end

panel

from

and

term-

washer

disconnect

connector

through

002,

disand

B.

e. Tighten screw located

switches.

f.

Tighten cable

g.

For

W9

as follows:·

1.

2. Assemble

4

3. Tighten cable

h.

For coaxial cable center centric. Clean

W5toSwitch Tree B and

Tighten connectors.

W8

and W10 connections.

8746B

standard model

Make sure coaxial cable ductor Clean

endofcable

with

methanol.

W9

Connect

tight.

the

TEST

output

(see

step

8746B

end

i substeps 1

option

conductor

with

methanol.

W9

through

connections.

001or002,

end

Connect

thentoA6

between

connect

center

cable

con-

is concentric.

finger-

connector

6).

make sure

of

W5 is con-

cable

(attenuator).

the

Model

i.

8746B

as follows:

ductor

W3J1

washer

terminator

nut

and

Assemble

1. Install cable cable. See Figure 6-3 for position

washer.

2. Install

bead

assembly

onto

nator.

3. Push cable connector

screw

finger-tight.

nator

4.

Tighten

nut

through

body

securing

rear

onto

connector

panel. Tighten cable

'5.

terminator

body.

outer

and

loosely

cable termi-

panel

cable termi-

connector

in

to

con-

onto

of

and

rear

a.

Connect

color-coded wires

terminals.

b. Install

attenuator

made when circuit-board swung

out.

c. Install

four attenuator-mounting

the

screws.

d.

Connect

cables

W4

finger-tight.

e. Tighten

Tighten cables

f.

attenuator

W4

g. Install covers.

through

connector

W5

and

mounting

W5.

and

attenuator

to

the

bracket

attenuator

to

screws.

Service

opening

is

)

..

~

'

....

!\(.J

'~.

001

lock-nut.

and

002)

and

Attenuator

Tighten

6. Solder

j.

(white-green

on

Tree B terminals

coded wires

k. Install

1.

8~24.

8-25.

attached.

top

Install covers.

Attenuator

Step

remove

To

terminator

white-black

the

Options

that

cross-brace.

A6 Step

the

have corresponding color-

(A6) Assembly

bly, proceed as follows:

a. Remove

b. Swing

top

out

bly and disconnect

c. Disconnect cable

bottom

and

circuit-board socket assem-

the

cabl~,W4.

W4

covers.

See page 8-17.

the

from

d. Disconnect cable W5, accessible

instrument,

the

of

tom

e. Remove

the

ing

f.

attenuator

Remove

the

ing made

swung

bracket

is

the

Mark

g.

for identification

attenuatar. factory

Disconnect wires.

repair. This

for change program where another

attenuator.

from

socket-head screws hold-

four

mounting

the

to

attenuator

the

circuit-board

the

when

out.

color-coded wires

when

installing a replacement

Return

attenuator

may

it

'bracket.

through

exchanged

be

attenuator

the

To install A6 assembly proceed as follows:

white-blue

Switch

to

Assem-

attenuator.

the

at

.

the

connector

attenuator

to

attenuator

an ex-

on

is

bot-

open-

to

for

8-26. Line Stretcher (A5) Assembly

8-27.

To

remove

the

A5 Line

Stretcher

proceed as follows:

a. Remove

the

bottom,

top,

covers.

front-panel APC-7 connector-

b.

Remove

both

coupling assemblies as follows:

1.

Partially

extend as a guide Model

11587A

2. Position spanner wrench, HP Part No. 5060-0237, so

wrench engage holes

the

coupling sleeve

spanner wrench

for

Connecto-rKit).

pegs

both

assembly. Thread spanner wrencl1 coup-

connector.

on

nut

ling

3. Hold gold-plated section

1/2

firmly with a

thin

wrench while removing

unscrewing

assembly

by

ner wrench.

CAUTION

Do portion rotate

while removing

assembly.

allowed

of

vity

of

to

the

connector

the

connector

the

If

rotate,

the

coupler may

gold-plated

the

allow

not

affected.

allen-screws in lock-ring

4. Loosen behind

two

panel, slide lock-ring back,

front and remove front-panel mount.

Assembly

side panel

and

to

(part

face

the

on

coupling-

the

in

connector

of

inch open-end

connector

the

with

to

end-

the

is

directi-

be

connector

serve

of

end

span-

8-5

Service

c.

TENSION

d.

Remove

e.

Remove

strip

on

one

edge

ments,

f.

remove

Remove

side-frame

g.

Remove

which

one one ENCE

hold

h.

Remove

screw

above

connectors.

i.

Pull side-frame front

panel.

j.

Loosen remove

right

Remove

control

the

REFERENCE

knob. power the

LINE

fluted-aluminum

each side frame, using a

of

the

strip.

On

rack-mounted

rack-mounting

the

two

three

top

of

and

holding

screws

to

the

cross-brace

the

brace

one

viewed

remove

panel.

to

the

at

the

out

the

each

the

end

chassis.

the

side-frame

the

end

TEST

left

(when

slightly

screws

of

front

switch

razor

brackets.

holding

front

and

above

from

the

right

side-frame

PLANE

retaining

stick-on

blade

the

on

each

panel.

by

removing

two

screws,

the

REFER-

the

left

EX-

ring. trim

to

instru-

left

side

front)

end

and

lift

of

1.

2.

3.

To

install a

a.

Connect

dB

attenuator.

(See

Figure

b.

Install

the

front c. Make sure

end

of

cables W3

ends

with

Hold inch

open-end

Loosen

a

1/2

lock-nut

Unscrew attenujltor open-end washer, come

Line

Do

6-3.)

Line

of

the

instrument.

methanol.

attenuator

cable

inch

open-end

back

cable

housing

wrench

HP

loose.

Reinsert

Stretcher

cable

W6

not

tighten

Stretcher

coaxial

and

Connect

housing

wrench.

terminator

onto

cable.

Bead

Part

No.

Assembly:

to

Line

and.cable

cable

W6 are

finger-tight.

Model

with

lock-nut

wrench,

terminator

using

a

assembly

5000-8676,

any

loose

Stretcher's

terminator

W6

center

concentric.

8746B

a

1/2

using

and

slide

from

7/16

inch

and

may

parts.

10

lock-nut.

through

conductor

Clean

k.

·Disconnect

circuit-board.

m.

using

output

nut back from

Disconnect

a

3/4

n.

Disconnect

connector.

psing

onto

connector

1/2

wrench.

p.

Remove filter-capacitor out

of

the

way. \

q.

Remove

mounting

bracket

bly.

r.

Remove

(Stretcher's

front

s. Remove

to

rear

panel.

inch

open-end

cable W6

Cable

inch

open-end

cable,

then

body

three

bracket

two

and

three

mounting-plate

two

the

connector

Loosen

unscrew

using

screws

and

screws

remove

screws

W3

from

wrench.

at

the

cable

wrench

7/16

on

swing filter

on

power

holding

to

holding

to

pushbutton

Line

Stretcher,

REFERENCE

terminator

and

slide

cable

terminator

inch

open-end

the

electrolytic

capacitors

power

supply

the

chassis.

Line

Stretcher

lock-

nut

supply assem-

Line

d.

front

mounting-plate

e.

Tighten

~.

Install

mounting

g. Install h.

Connect

connector

1.

Install

three

cables

power

bracket.

electrolytic

and

install

top

screws

to

the

W6

supply

pushbutton

front

cross-brace

screws.

j.

Install

the

power

panel.

k.

Turn two to

screws

rear

and

panel.

instrument

spacers

To

insert

holding

spacers, spring

slightly using a·screw driver and

rear

1.

panel,

Install

if

necessary.

trim

ring

and

holding

chassis.

and

W3.

capacitor

panel.

LIN~

upside

the

between

clamp.

Line

Stretcher's

circuit-board

assembly.

circuit-board

and

all side-frame

switch

down

Line

in

and

Stretcher

rear

Line

Stretcher

and

front

install

panel

of

10

8-6

t.

Remove

the

instrument.

u.

Disconnect

dB

attenuator

Line

Stretcher

cable

W6

as follows:

from

through

Line

the

front

Stretcher's

ffi.

Install assemblies with

an

coupling

n.

Install all covers.

two

firmly

open-end

assembly

by

holding

wrench,

with

APC-7

a

spanner

connector

each

outer

while

tightening

wrench.

coupling

conductor

the

•.••.•..'..

;.<

...

t.,

•

Model

8-28. Directional Coupler

8-29. proceed

8746B

To

remove

as follows:

a. Remove

DC1 is connector mating tion

mou~ting

this (on platetoaid·in positioning coupler.

mounted

with

of

directional coupler,

at

least

the

DC1 Directional Coupler,

the

top

Note

so

will move slightly

the

Model

this

Directional Coupler

plate

is critical. Beforeremoving

two

sides)

DC1

and

that

(Port 1 Coupler)

bottom

11608A.

mark

on

covers.

the

front-panel

to

its position

the

mounting

the

replacement

The

insure

posi-

on

its

g.

Remove DC1,

cable

W8

from

the

h. ' Disconnect ler's L-shaped end

wrenches.

1.

Disconnect

the

DirectionaL;tCoupler.

j.

Remove

Directional Coupler.

To

install

a. Position

using

marks

adapter

the

Direction

new

made

the

mounting

instrument.

W8

from

the

Directional Coup-

by

using

two

the

blue bias-circuit leads

mounting

Coupler

for

DCI

replacement:

coupler

original Directional Coupler.

on

plate,

3/4

inch

plate

from

mounting

Service

and

open-

from

the

plate,

b.

Remove associated<APC-7

ling assembly as follows:

1.

Partially'extend coupling sleevetoserve as a guide Part

Connector

2. Position spanner on

the holes 'in wrench sleeve.

3.

Hold gold-plated section firmly wrench coupling-assembly a spanner wrench.

Do

not

allow

the

connector

coupling assembly.

to

allowed coupler

c. Loosen

hind

front

front-panel

d.

Disconnect cable Cable adapter moved.

inch Directional Coupler's stainless-steel a pairofplastic-jawed pliers.

sible

W8

later,

e. Disconnect cable

open-end wrench, while firmly holding

f. Remove

from

rotate,

maybeaffected.

two

panel, slide lock-ring back,

connector

will

be

after

the

top).

for

the

spanner wrench, HP

No. 5060-0237

Kit).

wrench

front

faceofthe

the

connector

withathin

while

CAUTION

the

to

allen-screws

mount.

disconnected from

the

two

removing

by

gold-plated

rotate

the

while removing

If

the

directivity

W8

from switch tree

Directional Coupler is re-

W7

from

pozi-drive screws (acces-

1/2

connector

(partof11587

so

wrench engage

face. Tighten

of

inch open-end

unscrewing

portion

connector

in

lock-ring be-

the

DCI

connector

coup-

both

connector connector

of

is

of

the

and

remove

L-shaped

using a

pegs

with

B.

3/4

the

b. Make sure coaxial cable

end

of

cable

methanol. adapter. the

switch

inch

A

open-end

c. Reassemble'

on

coupler.

Hold withanopen-end wrench. Coupler damagedifthisisnot

d. Slide

coupler.

e. Install

not

install mounting-plate screwsatthis

f. Make sure coaxial cable endsofcables with

methanol.

g.

Connect

finger-tight.

h.

Install front-panel

lock

ring.Donot

1.

Install APC-7

by

firmly holding open-end wrench, while tightening coupling assembly

with

a spanner wrench.

j.

Adjust

front-panel

1.

W8isconcentric.

Connect

Position cable

treeBconnector.

coupler

lock

connector

Connecta20 panel APC-7 will aid in aligning

cable.

wrench.

connector

CAUTION

connector

ring over front-panel

new

coupler

W7

and

8 are

cablesW7

tighten

connector

outer

the

positionofnew

as follows:

W8tocoupler

W8

done.

lock-ring allen screws.

conductor

cm

connector.

center

so

thatitmates

Tighten

coupling

parts

from

and

mounting

center

concentric.

and8to,

connector

coupling

air-linetoeach

the·

conductor

Clean

front-panel con-

end

with

L-shaped

with

W8

with

a

3/4

assembly

turning may

be

portofnew

plate.

Do

time.

conductor

Clean ends

new

coupler

mount

with

couplertoalign

These air-lines

and

assembly

1/2

inch

front-

8-7

Service

Model 8746B

nectors. A slight tilting

be

more

tors will

apparent

of

the

with

connec-

the

lines connected.

Loosen

2. mounting-plate spacers

7/16

inch

and

nuts

adjust align coupler. Tighten nuts. Do tighten thE{ freedom movement plate·spacers

3.

If

alignmentinany

must

mounting

connector

the

front-panel

be

screws excessively

will

not

and

maybedamaged.

connectorisout

direction

repositioned

have a slight

the

mounting-

the

on

its mounting

coupler

plate.

4. With a 20

T 2,

POR of

the

inches and ends shouldbeat

cm

air-line

connector

on

PORT 1 and

spacingatthe

air-lines shouldbeapprox.

the

4.810 same

height. Remove air-lines. Check coup-

for

lers

equal extension

from

front

panel.

k.

Tighten cable W7, holding

stainless-steel

connector

with

a pair

the

of

coupler's

plastic-

jawed pliers.

1.

Tighten cable

m. Tighten

W8atswitch tree B.

the

front-panel connector-mount

lock ring.

n. Solder

coupler's terminals, in

"

d.

Replace

8-30. Directional Coupler DC2 (Port 2 Coupler)

the

blue bias-circuit leads

any

order.

instrument

top

and

bottom

to

covers.

air-

on

to

not

or

of

end

the

wrench

while removing connector coupling-assembly spanner

Do

not

allow gold-plated nectortorotate ling assembly. rotate,

directivity

V\Tench.

CAUTION

while removing

If

connector

of

affected. cO.

Loosen located behind and remove

d.

Disconnect instrument) using a

the

connector

two

allen-screws

front

panel, slide lock-ring back,

Wll

from DC2J2

3/4 while holding stainless-steel pair

of

plastic-jawed pliers.

Disconnect

e.

L-shaped adapter using

f. Disconnect

tree

A,

and

remove

necessarytoinstall

g.

Remove capacitor mounting tor

assembly

outofthe

h. Remove

from

the

chassis and

WI0

two

other

WI0

new

coupler.

three

screws

bracket

way.

the

coupler-mounting brackets

then

Coupler.

i.

Remove

j. Unsolder

the

Directional Coupler.

the

two

Coupler.

by

unscrewing with

portionofcon-

the

coup-

coupler

mount

is allowed

may

from

in

front

to

be

lock

panel.

(bottom

inch

op~n-end

wrench,

partofcoupler with a

from

3/4

endofWI0

the

coupler's

inch wrenches.

from

switch

completely. Removal

from

and

from

swing

the

electrolytic

the

capaci-

Directional

green bias leadstothe

ring

of

is

8-31. To remove proceed

as

follows:

"a. Remove

b.

Remove APC-7

bly as follows:

1. Partially extend coupling sleeve to-serve as a guide for

Part No. 5060-0237. This wrench partofthe

2. Position spanner wrench so

peg~

engage holes in Tighten wrench sleeve.

3.

Hold gold-plated sectionofconnector

firmly with a

8-8

the

on

the

DC2 Directional Coupler,

top

and connector

HP

the

faceofthe

bottom

the

11587A

thin

covers.

coupling assem-

spanner wrench, HP

Connector Kit.

spanner wrench

the

connector face.

1/2

inch open-end

that

both

To replace

the

Directional Coupler DC2, proceed

as follows:

a. Remove APC-7

connector

coupling assem-

bly as follows:

1.

Partially as a guide

extend

coupling sleevetoserve

for

spanner wrench, HP Part

No. 5060-0237.

is

2. Position spanner wrench so pegsonthe gage holes in

faceofspanner wrench en-

the

connector

that

both

face.

Tighten wrench sleeve.

3. Hold gold-plated section

firmly with a wrench coupling assembly

thin

while removing

by

of

1/2

inch open-end

unscrewing

connector

with

spanner wrench.

Model

8746B

Service

CAUTION

Do

not

allow gold-plated

~ector

lIng assembly.

rotate,

to

rotate

directivity

while removing

If

connectorisallowed

of

coupler

fected.

b.

Install

c. Install

lock

ringonPORT2port.

new

coupler

through

instrument.

d.

Install screws in coupler-mounting bracket.

Do

not

tighten

e.

Make sure coaxial cable

end

of

cable W10 is concentric. Clean methanol. coupler

clean Wl1

and

f.

Inspect

with

finger-tighttonew

screws in

Connect

switch

center

alcohol,

the

cable finger-tight

tree

A.

conductorofcable

if

necessary.

coupler.

g. Install new coupler-mounting

chassis.

h.

Do

not

Tighten

tighten

cables WIO

mounting-bracket

and

portionofcon-

the

may

bottomofthe

bracket.

center

Connect

brackets

Wl1.

coup-

to

be

af-

conductor

end

with

to

new

Wl1

and

cable

screws.

to

m.

Install

eIe

ctrolytic-capacitormounting

bracket.

8-32. Directional Coupler

8~33.

To

remove Directional tIonal Coupler associated ceed as follows:

a. Remove

from

front)

~.

Disconn~ct

,holdIng

connector

c. Loosen located tor

mount.

d.

Remove

(accessible

e. Remove

the

withapair

behind

through

1!.Ji

rear

bottom

cover.

and

~ables

DIrectIonal Coupler's stainless-steel

of

plasti~-jawed

the

two

rear

panel

the

two

topofinstrument)..

the

Directional

strument. To

install a

new

Directional

follows:

DC

3

with

W1

Coupler

top,

and

DCa

RF

INPUT), pro-

left

(when

W4, while firmly

pliers.

allen-screws

and

remove

-in

the

coupler-mounting

Coupler

proceed

(Direc-

viewed

lock

ring

connec-

screws

from· in-

as

i. Install front-panel

not

tighten

lock-ring allen screws.

connector

mount.

j: Install APC-7 coupling assembly, firmly holdIng end

wit~

front-panel

outer wrench a

spanner

Adjust

k.

1.

conductor

while tightening coupling assembly

wrench.

position

connector

Connecta20 panel

APC-7

withathin

of

new

as follows:

em

connector. will aid in aligning nectors. A slight tilting tors

willbemore

connected.

lines

2. Adjust positionofcoupler

1/2

inch open-

coupler

air-linetoeach front-

These air-lines

the

front-panel con-

of

the

apparent

with

and

mounting-bracket screws.

3.

With a 20 PORT 2, of

the

inches and

em

air lineonPORT 1

connector

spacingatthe

air-lines should be

end

should

approx.

beatthe

height. Remove air-lines. Check coup-

for

lers

equal extension

from

panel.

1.

Solder wires

circuit terminals. Wires

to

the

new coupler's bias-

can

be

solderedineither

order.

Do

to

align

connec-

the

air-

tighten

and end

4.810 same

front

a. Slide

lock

ring

onto

new

coupler's

connector.

b.

Install sure coaxial cable W1

and

anol. Tighten

c. Install

Do

not

tighten

d.

Install tighten

new

couplerinthe

4 are

center

concentric.

conductor

Clean

endsofcables finger-tight.

the

two

coupler-mounting

screws.

RF

lock

input

ring. Tighten

connector-mo-unt

instrument.

ends

coupler-mounting

screws.

WI

e. Tighten cables

new

holding with

a pairofplastic-jawed pliers.

f. Install

8-34. Port Coupler 10 dB Attenuator

8-35.

The PORT1and model 10-dB greater OK,

and attenuatar.Ifthe

than

the Replace procedure.

coupler's

top

and

directional coupler associated

PORT2(DCI

Option

001

specifications

trouble

the

10-dB

may

attenuator

Attenuator

andW4,

stainless-steel

bottom

and

(not

Option

return-match

and

beinthe

using

is

instrument

2) in

Switch

10-dB

HP

08743-60014.

type

Make

endsofcables

with

meth-

screws.

while firmly

connector

covers.

with

the

standard

002)

contains

reflection

Tree B

attenuator.

the

following

Part

No.

N

and

a is is

8-9

Service

a.

ment

Remove

b.

If

side frame.

c.

Loosen

d

..

Remove

PORT

top

1 coupler,

coupler

cable

adapter.

e.

Loosen

coupler,

f. With

brass

nut

steel

connector

g. With a

5060-0237,

h.

Remove

which

end

Do

not

No.

2190-0831),

No.

5020-3297), 1460-0977) both of

these

swing

sides

other

it

out.

3/4

between

mount

spanner

unscrew

10dBattenuator

has

the

lose

or

behind

of

the

parts

are

inch

L-shaped

connector

mark.

CAUTION

damage

tact.

To

replace

the

10

dB

as follows:

a.; Install a

(HP

Part

No.

2190-0831)

The

marked

and

should

end

toward

b.

With a

5060-0237)

. c. With

brass

nut

between

steel

connector

d.

Inspect

with

methanol,

new

08743-60014)

on

each side

end

has

be

inserted

the

coupler.

spanner

screw

in

connector

3/4

inch

L-shaped

mount

coupler

if necessary.

e. Make sure coaxial cable

end

is concentric. Clean

with

methanol.

f.

Remount

the

couplers.

8-10

and

bottom

mounting

end

attached

cable

on

open-end

on

coupler.

wrench,

the

sliding

or

spring (HP

the

sliding

attenuator

necessary

attenuator

10

dB

with

of

NOTE

the

with

wrench

open-end

adapter

on

coupler.

connector

open

instrument

remove

plate

to

coupler.

wrench,

adapter

bead

cartridge,

washer

contact

cartridge. All

for

proper

cartridge,

attenuator

a

washer

the

cartridge.

lowest

reflection

the

(HP

bead

holder.

wrench,

faces

center

cable

nearest

or

brackets.

the

L-shaped

If

and

stainless-

HP

Part

holder.

(HP

Part

(HP

Part

No.

con-

proceed

cartridge

(HP

marked

Part

tighten

and

stainless-

and

conductor

connectors

covers.

instru-

PORT

unscrew

No.

noting

on

Part

No.

clean

g.

Reconnect

h.

Reconnect

the

cables.

side frame,

place covers.

8-36.

Port

1 and

Port

Assemblies

8-37.

The

couplfng assembly

PORT

1

able

1

and

PORT

..

To

replace

2 Connector Coupling

2 APe-7

connectors

a coupling assembly

follows:

a. Partially a guide 5060-0237

b.

Position

the

front

connector

c.

Hold

firmly

with removing with

a

spanner

Do

not connector end-assembly. to

rotate,

may

d.

Order

1250-0820

for

connector

be

the

(part

face

of

face.

Tighten

gold-plated

a

thin

wrench.

allow

to the

affected.

coupling

or

extend

spanner

of

HP

11587A

spanner

the

wrench

1/2

inch

end-assembly

CAUTION

the

gold-plated

rotate

If

the

directivity

sleeve

coupling

coupling sleeve

wrench,

wrench

section

open-end

while

connector

assemblyHP

nut

1250-0819.

e. Assemble

cedure. .

8-38. REPAIR

8-39. Replaceable Parts

8-40. Parts replace

other

shown

parts

by

reversing

in

not

Table

listed

the

6-3

contact

Hewlett-Packard office.

8-41. Location Diagrams

8-42.

The S'ervice nents opposite

reference

Sheet

mounted

the

designator matic diagram, tion

diagram

location

6.

of

test

The

locations

on

printed

circuit

schematic diagram.

may

be

then

located

the

same

Service

points

of

found

on

the

Model

if

removed,

of

the

front-panel

is replace-

proceed

to

HP.

Part'

Connector

so

both

engage

holes

sleeve.

of

connector

wrench

by

unscrewing

-

portion

of

removing

is

allowed

of

the

coupler

Part

HP

Part

disassembly pro-

are

replaceable.

your

are

shown

individual

boards

compo-

are

The

from

the

parts

identifica-

Sheet.

8746A

and

serve

No.

Kit).

pegs

in

the

while

the the

No.

To

nearest

on

shown

part

sche-

re-

as

on

Model

8746B

Service

8-43. TROUBLESHOOTING

8-44. Introduction

8-45. Some general given in paragraphs 8-48 mation therefore

maybehelpfulinanalyzing

by-passing

troubleshooting

through

8-63. This infor-

portionsofthe

information

the

trouble

troubleshoot-

ing procedures. 8-46. A preliminary

given in Figure 8-2. This

various

particular

instrument

function

troubleshooter

duretofurther

8-47.

The

individual

need

not

be

performed order. formed

mined

ated

Preliminary

first, unless

by

other

withaparticular

troubleshooter

occurs,

for

cuit. circuits

8-48. Troubleshooting Procedure

he

can go

that

circuit

Refer

shownonthe

to

troubleshooting

procedure

functions.

this

procedure

to

another

isolate

troubleshooting

the

trouble.

troubleshooting

one

troubleshooting

the

troubleshooter

means

that

the

instrument

knowsinwhich

directlytothe

on

the

Service

paragraph 8-3

various Service Sheets.

procedure

checks

Foratroubleina

directs

procedures

after

the

other,

should be· per-

has deter-

troubleisassoci-

function.Ifthe

circuit

the

troubleshooting

Sheet

for

a listing

that

8-49. Troubleshooting is generally divided two

maintenance

the

circuit level, which isolates a cuit. Troubleshooting simple step-by-step fective circuit.

the

lates

trouble

levelsinthis manuaL

troubletoa cir-

flow

diagrams provide a

proceduretoidentify

The

second maintenance level iso-

to

the

component

level. A de-

The

tailed circuit description, a schematic diagram, a voltage table are provided

'to

aidintroubleshooting

on

each Service

downtothe

component

level.

8-50. Troubleshooting

Indications

from

Front-Panel

and

the the

proce-

in

trouble

cir-

of

the

into

first is

the

de-

and

Sheet

is

GAIN mal TEST CHANNEL GAIN

about the upon

8-54. Test Channel Gain Higher Than Normal.

Higher

tion

Lower tion

continuitiesinthe determined

EXTENSION the

probablyinthe

8-55. Test Channel Gain Lower Than Normal.

the GAIN setting normal, Troubles insertion loss insertion loss A small at troubles referring ure

8-56. Isolation

RF

ured by trouble

The

mon

occurs. However, tain

and

setting 19-22

test

the

than

indicates a

than

.indicates a loss in

display varies cyclically,

8410A

certain frequencies(atracking

required

dB

and

reference

particular

normal

1!10ss

normal

with

network

test test

for

normal

equal

channels

channel gain

in

gaininthe

channel gain

the

reference channel. Dis-

reference

by

moving

and

reference

Network

required

the

trouble

maybelarge

«5

may

insertion

the

observing

channel.

Analyzer

for.calibrationi~other m.ay

insertion

dB),

and

cause

the

loss

maybegeneraloroccur

canbenarrowedtoa

to

the

Preliminary

calibration. Nor-

for

calibration is

amplitude

and

signals

depending

analyzer.

for

calibra-

test

channel.

for

calibra-

channel

REFERENCE

the

be

can

display trace.

discontinuity

TEST

of

loss

CHANNEL

several

(>5

dB), small

often

PLANE

types.

discontinuities. A large

systemtobe

problem).

particular

unusable.

These

circuit

Troubleshooting

8-2.

of

RF Troubles.

signal change

when

the

s-parameter

is changed. This allows logical

observing

troubleisin

to

occurs

two

in

which s-parameter positions

andinwhich

that

portionofthe

or

more

pathsinwhich

this

common.path

The

pathsofthe

being

troubleshooting

positionsitis

RF

path

t4~

may

meas-

absent.

com-

trouble

still con-

several coaxial cables, several coaxial switches,

a directional coupler.

into

be

than

only

by

Fig-

the

If

is

If

8-51. Many troubles,·

be

cuits, can from

the directly the

Service

8-52. Troubleshooting from the Display Indicator

8-53.

The

narrowed

front-panel·indications. In these cases, go

to

the

Sheetofthe

network also indicate troubles, readily apparent. indicationisa change in gain. This may served the

on

8410A

the

display

Network Analyzer

suchaspushbutton

to

one

particular circuit

troubleshooting

flow diagram

circuit involved.

analyzer display indicator will

but

the

causes may

Except

for

total

failure,

indicatororas a change in

TEST

CHANNEL

lamp

not

the

be

cir-

on

be

usual

ob-

8-57.

If

the

repeatability

troubleislackofrepeatability

of

indications

upon

returningtothe

(non-

same switch position), suspect coaxial switches

switch

(no measure for

flowing

cable gently back-and-forth while observing play narrow connector assemble,

connectors.Ifthe

signal

through

shortoropen

through

the

indicator.Ifthe

the

troubletoone

is

at

and

check

1.

Center

conductor

troubleiscatastrophic

the

path),

useanohmmeter

circuits.Ifsome

path,

try

moving

display

trace

connector.Ifa coaxial

fault, remove

for:

concentric

signal is

each

coaxial

the

moves,

connector,

and

in

try

condition.

or to

dis-

to

dis-

good

8-11

Service

2.

Outer good

conductor

contact

cable ferrule tight, making

with

cable,

and

in

proper

position.

3

..

Mating surfaces

not

and

4.

Presence and conditionofwasher between cable

and

5. Condition ductor part, reassemble

If

the

8-58. observe tors

move while moving

trouble does

if

anyofthe

tilted.

cable terminator.

contact.

of

cable

connector

of

fingersorfemale center-con-

Repair

and

not

other

the

or

replace faulty

retest.

appeartobe

componentsorconnec-

cables. Tighten

clean

a cable,

any

loose connectors.

If

8-59. tors

Test

neither

are discovered, suspect

for repeatability

while observing

parameter, within .05 dB. Greater change indicate a

on

the

switch is moving with switching action.

A signal source may

8-60.

switch tree

of

the

switchtoobserve

the

switch tree.

should

be

disconnect

bad

coaxial cablesorloose connec-

the

by

switching s-parameters

the

display indicator.

the

display should

bad

coaxial switchorthat

be

input

with

a power

The

loss through

less

than

1.5

the

individual coaxial switches

meteratthe

the

transmission through

dB.Ifthe

coaxial switches.

For

a given

repeat

than

each

time

.05 dB may

a connector

connected

to

output

the

switch tree

loss is greater,

and measure each individually. Each individual switch should have a loss the,

loss should

quency, changing less

of

less

than

0.75

beasmooth

than

0.5 dB

dB. In addition,

change

from

with

8.2to12.4

fre-

GHz.

8-61. If neither cables, connectors, appear mon the tivity

bad, suspect

path.

Do.

not

the

take

coupler directivity

is

out

of

specifications,

couplerin

the

coupler apart. Perform

test

in Figure 4-1.Ifdirec-

the

return

nor

switches

trouble

coupler

com-

instrumenttoHewlett-Packard for repair.

and

the

tested

mainline

8-62. The coupler may also be removed

separately. Connect a signal source

to

port to the tions

nearest

the

auxiliary

from

other

the

mainline

port

the

open

auxiliary

port.

with

enddonot

a 50-ohm load so reflec-

measurement. Lossonmainline

be

less

than

should less

than

12

dBonthe

2 dB

standard model

001.Ifmainline transmission appears correct,

the

auxiliary arI» coupling. Remove meter power

50-ohm

be

20

from

±2 dB

the

meter

to

loadtothe

down

mainline

the

auxiliary arm.

mainline

from

the exceptatlower frequencies (coupling typically dB

downat500 MHz).

Other

8-63. possible. available, a power endofthe or

more s-parameter measured. Determine adding

RF

schematic defective and

repeating Domain Reflectometer ing

RF

methods

If

the

trouble

up

the

component

troubles.

of

proper

meter

path

cables

maybeconnectedtothe whichiscommontotwo

paths

the

attenuation

on

Service. Sheet1.Determine

by

the

test.

may

a

8-64. SCHEMATIC DIAGRAM NOTES 8-65. Schematic Symbols

8-66. Schematic symbols used

in

diagrams are shown

Table 8-2.

8-67. Selected/Non-Selected Terminology

8-68.

Both

the

s-parameter incident a diode matrix. This combinations lays in

attenuation

of

drivers which. operate·coaxial re-

both

switch trees and

pushbuttons

diode

HIGH/LOW terminology has been used

or

schematics in this manual. HIGH and. LOW refer voltages only and

to

tionship To find for

any

TRUE/FALSEoroperate/non-operate.

the

pushbutton

tableofthe

proper

Service

theydonot

condition

position,

Sheetofthe

concerned.

port

andapower

Be sure

pathofthe

on

the

Model

to

interfere

Option

8746B

meter

terminate

with

coupler

002

and

Option

the and test

the

power

port

and

connect

the

Connect

port.

Coupling should

signal in

the

mainline,

24

testing

and transmission

proper

RF

troubles are

and

connectors are

transmission

showninthe

can

path

be by on

the

removing a

A high frequency Time

component

alsobeusefulinisolat-

on

the

schematic

pushbuttons

and

the

operate:.through

matrix selects various

the

attenuator.

on

the

to

have

any

fixed rela-

-of

a particular circuit consult

the

truth

particular circuit

a

A

8-12

Model 8746B

SWEEP

: :

~

••••

........

••

c:>

0 0 0 0 0

O~

OSCI

:

LlATOR

:

~

: :

Service

SWEEP REFERENCE

HP

.~======:=;:;=====~

8746B

I \

TRANSISTOR

FIXTURE

I

lTH

W

g

SHORT

AL

I

COAX

FOR

S11

THROUGH-

CALI

5

FOR

LINE

BRATOR

AND

21

HARMONIC

FREQUENCY

CONVERTER

\

:

I

COAX

g

FOR

5

12

I

S22

AL

SHORT

Figure

Troubleshooting Test

8-1.

Setup

8-13

Service

Model 8746B

Connect sweep NEL region.

Press pushbutton tonislit

Press turn. one

Connect

pushbuttons. just reference dB.

equipmentasshowninFigure

oscillator

LEVEL

each

at anyone

each

Each

pushbuttonislit

short

8410A

forareadingon8410A

meter.

Meter

S-PARAMETER

lights

and

stays

time.

INCIDENT

pushbutton

Set

-TEST

trace.

ATTENUATION

lights

at anyone

to

PORT1.Press

AMPL

VERNIERtomid-range.

CHAN

TEST

CHAN

8-1.

Adjust

REF

CHAN-

indicatesinOPERATE

YES

pushbuttoninturn. lit,

and

only

one

pushbut-

YES

pushbutton

and

stays

lit,

and

time.

YES

S11

and0dB

GAIN

for

a 0dBgain

GAIN

settingis19-22

YES

Each

only

Ad-

........

_N_O__......~GotoFigure

NO

..........

---II~..

in

NO

-

a.

NO

PUSH

Power

Supply

b.

ONE

PUSHBUTTON

Figure

8-13,

vice

Sheet

GotoFigure ingonService

a.

NO

TEST

S-Parameter

b.

LESS

THAN19dB reference.Goto Troubleshooting.

c.

GREATER reference.Goto shooting.

8-3,

Reference

BUTTONS

TroubleshootingonService

S-Parameter

2.

8-21,

Sheet

CHANNEL

TroubleshootingonService

THAN22dB

Channel

LIGHT.Goto

DOES

Attenuation

4.

POWER.Goto

GAIN

Figure

Figure·

8-4

NOT

TroubleshootingonSer-

Select

needed

8-3,

Reference

GAIN

needed

Test

Troubleshooting.

Figure

8-30

Sheet

LIGHT.Goto

Troubleshoot-

Fig.

8~13,

Sheet

2.

for

a 0

dB

Channel

fora0dB

ChannelTroub

6.

le-

8-14

Connect pushbuttons.

o

is

87468tobe

Check ance specificatio

GotoFigure

short

Adjust

dB

gain

reference

19-22dB.

usedinmanual

directivityofboth

procedureinparagrah

ns.

8-4,

toPORT2.Press

8410A

TEST

trace.

TEST

CHAN

YES

~,

operation

~

YES

port

couplers

4-1.

Directivityiswithin

~

rYES

Test

Channel

Troubleshooting.

a.NOTEST

S22

CHAN

GAlNsetting

only.

using

and0dB

GAIN

for

perform-

NO

a

.t----___.:--..-

NO

S-Parameter

b.

GREATER reference.Goto shooting.

GotoFigure

-

on

Service

Examine connectorofthe be

undamaged,

when

pushed.

+

Contact

nearest

HP

office

instructions.

Figure 8-2. Preliminary Troubleshooting

CHANNEL

TroubleshootingonService

THAN22dB

8-27

Sheet

5.

the

colletinthe

have

YES

for

POWER.Goto

Figure

Remote

center

suspected

equally-spaced

8-4

coupler.

Figure

Sheet

GAIN

needed

Test

Channel

Control

Troubleshooting

conductorofthe port

This

collet

fingers,

and

I

Refertopara.

8-13,

2.

for

0

-dB

Trouble-

should retract

3-34·1

~

~--

-=-

---

-

----

--

-----

- - ': -~-

0---

_ _

-~

~-~-

::~"~~

:_-"~~~

'~~",,"::~,:

'::/

~'~;~~<~"

-"

- -

Model

From

8746B

Preliminary

Withasignal

insertion

port.

Insertion

below.

Model

8746B

normal.

Troubleshooting,

source

loss

from

RF

loss30dB+2dB.

reference

Figure

8-2.

and

power

meter,

measure

INPUTtoREFERENCE

Also,

see

YES

~~

channel

insertionloss

notes

Service

Disconnect

NO

-

power located

belowRFinput

NO

is

Troubleshoot

-

REFERENCE

meter

to

nearest

W2,

LINE

REFER~lt~CE

side

paneL~

Poweris20dB±2

level

(24dBat

W3,

~

W6,

YES

,

500

and.A5line

W2.

LINE

MHz).

Connect

connector

dB

stretcher.

NO

Troubleshoot

....

Wl

and

DC3

Note1.Reflections from a discontinuityonone sideofthe line stretcher will combine with

reflections in the line stretcher or with reflections from the other side of the line stretcher. The response curve line stretcher position, the phase relationship between the sets and the response curve will be altered. Monitor frequency response at several REFERENCE PLANE EXTENSION settings. than 2 dBatany REFERENCE PLANE EXTENSTION setting, the trouble maybein the line stretcherordiscontinuitiesoneach sideofthe line stretcher.

Note 2. A relative increaseinpower indicates a trouble in the referencei channel. A relative

decrease in power indicates a trouble in the test channeL A narrow spikeismost likely causedbypoor contactofcable center conductor pins, one fingerofa female pin making contact,orgross outer conductor separation. A power change over a broader frequency range

is

most likely caused by a cable outerconductor grounding problem.

is the resultant

of

all

discontinuities.Bychanging the

of

reflections changes

If

the overall power variationisgreater

not

Figure 8-3. Reference Channel Troubleshooting

8-15

Service

From

ing,

Preliminary

Figure

Model 8746B

Troubleshoot-

8-2.

With0dB ATION,note

S11 S22 S21

line.

Frequency dB s-parameters. low.

GotoFigure ator) on

Service

INCIDE.NT

display

with-shortonPO

with

shortonPORT2and

and

S12

responseiswithin

overanoctave

Also

~,

8-22,A6(Attenu-

Assembly

Sheet

Not.e1.Notchesofapproximately 1 dB in the displayed trace at about 700

resonances in the bias·coils

ATTENU-

at:

RT

with

through-

for

all

four

see

notes

YES

Troubleshooting

4.

be-

a.

TROUBLEINSOME to

Various

S-ParametersonService"

1,

b.

NO

2

in

the couplers. See typical trace below.

TROUBLE increaseinpoweratoneormore Channel at

oneormore s-parameters cablesbyfeedingasignal INPUT. Frequency

Check ter

DC3ina

COMMONTOAll

Troubleshooting.Ifthe

Set

the

responseiswithin2dB.

AttenuatorA6and

similar

(W4,

input

manner.

POSITIONS

frequencies,

W5,

W9,

level

coup-I

ONLY.Goto

Sheet

POSITIONS.Ifthe

frequencies,goto

display

showsarelative

suspect

Attenuator

at the

to0dBm.

the

A6,

frequencyinquestion

Connectapower

MHz

are normal. They are caused by

Table

2.

components

and

Coupler

Troubleshoot

.

its

connectors.

8-3,

Paths

display

showsarelative

Figure

8-3,

decreaseinpower

commontoall

DC3).

metertoW5P2.

VES

t

cableW9and

See

Common

Reference

Test

into

the RF

Note

the

2.

8-16

in

2. A relative increase indicates a trouble in the test channel. A narrow spike center conductor pins, one finger separation. A power change over a "broader frequency range conductor grounding problem.

If

a cable's center conductorisnot

3. an increase in insertion loss. The increased insertion loss

(See Response Curve.)

4. See paragraph 8-35toreplace 10dBattenuator cartridges.

power indicates a trouble in the reference channel. A relative decrease in power

of

See

a female pin

centered it may distort a switch's center conductor contact and cause

Note

2

~

\

it

---"""1:

'.

not

Figure 8-4. Test Channel Troubleshooting

is

most likely caused by poor contactofcable

making I contact,orgross

is

most likely causedbya cable

is

most likelytooccur from 11to12.4 GHz.

T

<2

dB

outer

conductor

1

See

Note

3

outer

Moqe18746B

INDEX

Figure 8-7

shows

diagram

andasan circuit Service

found.

BLOCK DIAGRAM CIRCUIT DESCRIPTION

The four (or matrices Operationofthe shownonService

The switch· circuits. When a

matrix.

be

The

-25V.

driver switch associated

BLOCK DIAGRAM AND INTERCONNECT DIAGRAM

is

the

Index

the

signal circuits in

for

an

overall

index

for

of

interest.

Sheet

Model

s-parametersofan

contact

RF

drivers.

The

fedtothe

drivers are tW9-state circuits, i.e.,

A high

output

to

(schematic

8746B

feed

switch

diode

one

RF

consistsofcoaxial

closures closed

corresponding signalstothe

switch-tree drivers Sheet

control

The

latch

matrix

appropriatedriver(s).

input causes

side. A negative driver

switch(s)toswitchtothe

Block Diagram and

picture

the

schematics.

The

numeral

unknown.

block

and

form

and

·of operation, signal circuit To

useasan

just

inside

associated information)

RF

circuitry which canbeswitchedtotest

Depending

in

remote

operation),

switch-tree drivers

and

attenuator

1.

circuits consistofpushbutton

push

buttonson

circuit is latched,itprovides

is arranged so

from

the

diode

the

associated

the

Switch Panel Assembly

thatanoutput

the

matrix

RF

switch(es) output opposite side.

Interconnect

their

interconnectiops. Refertothis

index, first find

the

lower right

upon

which

the

drivers'

the

correct

from

driver

output

'causes a High

s-parameteror

(no

input

Diagram. This diagram

interconnection

the

blockofthe

corner

on

which

pushbuttons

latch

and

actuates

switches,

input

a given

voltage. is

(+25V)

to

driver) will cause

indicates

the

circuit will be

~;t-

are depressed

circuits

attenuator

the

RF

latch

circuits and

A4

actuate signaltoa diode latch

either

output.

attenuator,

details,

the

and

diode

drivers.

circuitry

latch

circuit will

+25V

or

A positive

to

the

F

C

S

The

proper circuit manual the

INCIDENT ATTENUATION

,

the

MANUAL/REMOTE switch REMOTE position, attenuation concerning

inputstothe

to

latch.

operationasfor

remote

The

the

can

be

selected

oper~tion,

Remote

circuit

remote

INCIDENT ATTENUATION

Control Circuitry will cause

operation

operation. In addition, latch

only

refertoService

of

the

circuits

82

is in MANUAL. When this switch isinthe

by

maybeoperated

remote

Sheet

the

remaining circuitry is

when

using

only

pushbuttons

closure.

5.

For

are disabled and

further

associated latch

the

same

for remote manually

closure

when

information

•

INDEX

DIAGRAM

INTERCONNECT DIAGRAM

BLOCK

AND

TOP

ERENCE

NE.CTOR

:PANEL

ETCHER EM.BLY

LINE

NEAREST

S2

REMOTE/MANUAL

SWITCH

A9

POWER

(Fl,

Main

MODULE

fuse)

MODEL84l1A'

FITS

HERE

A7 SWITCH TREEA ASSEMBLY

A2

BUFFER

ASSEMBLY

A3

DRIVER ASSEMBLY

UNDERNE~

A6

ATTENUAl

ASSEMBLY

A4

SWITCH (PUSHBUTTON)

PANEL

ASSEMBLY

Figure 8-5. Assemblies,

Top

A1Al

POWER

SUPPLY

View

ASSEMBLY

FUSES

F2-5

BIAS

AND

BIASSENSE LEADS

FUSES

I

A9

)WER

MODULE

ASSEMBLY

\

BOTTOM

A2

BUFF

AS

SWITCH

ASSEMBLY

TREE

J6

1

B

So.

PARAMETER

CLOSURES

ATTENUATION

CLOSURES

REMOTE

CLOSURE

I

{---p<

'24

~

J

1

I I

I

,

--+1?<

1

33

--f<

*

I

1 1

I

1

--f!<

'18

COMMON~

Figure 8-6. Assemblies,

Bottom

View

A4

SWITCH

PANEL

(PUSHBUTTON)

S

S~Xt{Il-JI

6

11

2

N

l1111u11517

12

J6

I

\METER

{

---P<

)<;URES

~

- I

I

,

I I I

I

-{!?(

lATION )SURES

REMOTE

CLOSURE

'33

----F<

I

*

I

I I

I

f!<

'18

MONw%

REMOTE

CONTROL

CIRCUITRY

6'---

+

llV

3

ATTENUATION

LATCH

CIRCUITS

+

5V

WITH

REMOTE

OV

WITHOUT

WITH

REMOTE

OV

WITHOUT

CLOSURE

r MANUAL'

L

___

I I

I

I I

S2

I I

..J

......

C

0

E K

lOdB 20dB

21

40dB

NOTE:

BOLO

NUMERALSINDICATE

POWER

SCHEMJ

SUPPl

'Figure 8-7.

Index

Blocl1

5HBUlTON)

TTENUATION JSHBUTTONS

Service

+

11.

5V

3

S

s~~~.

~11

..

_JI

~Jl~~

....--...,~............-I~-f----r--~-----------~

TENUATION

LATCH

IRCUITS

DIODE

MATRIX

3 3

-------~

r----,

L

~A~U~L..J

I

WITH

ITH

OV

REMOTE

OV

WITHOUT

REMOTE

WITHOUT

CLOSURE

I

t

I

:

I

I D

>--+----jf-------:---<

I K

I

S2

c

E

U

22

21

IOdB 20dB

40dB

ATTENUATOR

4

NOTE:

BOLD

NUMERALS

INDI

CATE

SCHEMATICNUMBERS

AlAI

POWER

SUPPLY

+25V

A

6

-25V

'Figure 8-7.

Index

Block Diagram & Interconnection Diagram

8-17

SERVICE SHEET 1

RF

CIRCUITS

The

RF

circuitsofthe

an

stretcher,

Each

switch

time.

When energized,

both

outer

of

these switches permits measuring all four s..parametersofan

moving

811 S12

attenuator

tree

consistsofthree

relays energizetothe

the

unknown, ReflectionatPORT 1 Transmission

Model

ands..

parameter switch trees

the

center

as follows:

from

PORT2to

8746B

consistofcoaxial directional couplers, a line

with coaxial switches which are energizedatthe relayofthe

switch tree movestoone

opposite side. When properly energized,

PORT 1 (reverse gain)

connecting coaxial cables.

same side while the

action

unknown:Jt·without

-821Transmission S22

ReflectionatPORT 2.

A positive driver section switch the

Referring

(10

treetoswitchtothe

RF

path.

to Attenuator connectionsinthe PORT1and and

002,

the mainline. Fo.r the

mainlineofthe

channel cones In

additiontointerchanging

the

device

model

under

and co.uplers is sectionofthe in

either aQd Coupling

models

the

Options

for

and

output

d~,

20

dB,40dB)toswitch in. A negative driver

Schematic

and

TEST

standard model. PORT RF

input

the

standard model,

coupler.

from

the

test

Option

001,

attenuated

coupler. Thereference channel coupler does standard or 001

and

all couplers (including reference channel coupler)inboth

Options 001

from

PORT

1toPORT 2 (forward gain)

causes a switch treetoswitchtoone

opposite sideorthe

1,

note

that

connectionsGfrom

output

are interchanged

For

the

2 couplers is connectedtothe

into

the

PORT I

For

Options 001

the

and

RF

auxiliary lineofthe

the

input

and

are different

the

signal

10

dB.InOption Option

002

versions have

and

with

the

through

002,

001or002

10

002isnominally 20 dB.

attenuator

in

Opt~ons

standard model,

auxiliary line.

PORT 2 couplers is connectedtothe

outputtothe

and

002,

coupler.

output

connections,

various options.

the

mainline sectionofthe

thereisno

versions. However, dB

attenuationinthe

sideoran

output

attenuator

will cause

sectiontoswitch

'

the

switcl) trees

001 and

the

RF

For

002

input·

Options

TEST channel comes

the

RF

outputtothe

the

signal levels

For

both

the

PORT

attenuationinthe

not

have

any

attenuation

both

the

line stretcher.

the

out

to

A6

from

the

into

the

001

from

TEST

standard

1 & 2

mainline standard standard

of

to

From

S-Parameter

Set

sweep

in

question

RF

inputto8746B.

Press

S11. Standard Option Option

mode:20dB

001:10dB

002:0dB

Troubleshooting,

oscillatortoCW

and

adjust

sweep

Connect

Poweriswithin:

+4 - 2

+0 - 2

operation

oscillatorto+10

power

dB

dB,

or

dB

belowRFinput

'YES

~

,

Figure

8-13.

at the

frequency

dBm

metertoPORT1.

level.

NO

Connect within: Standard Option

Connect nect

through-line

Power

loss lossinthrough-line Standard

...

_-

Press

S12.

is

within Standard Option

002:20dB±2dB.

power

metertoPORT2.Press

model:20dB

001:10dB

power

betweenRFinput

and

Power

lossinthrough-line

and

+4 - 2

metertoTEST

betweenPORT1and2.Press

plus:

Option

001:30dB+4-2dB.

loss

betweenRFinput

Option

001:30dB+4-2

+4 - 2

dB

YES

~

,.

YES

~

,

~plus:

YES

S22.

dB

belowRFinput

channel

output.

and

test

portiswithin

and

dB

Power

level.

Con-

test

S21.

port

oJ

is

NO

-

Measure those

which

8-3,

'Paths

vice

Sheet2to

to

isolate

all

four

s-parameters.asinstructed,

failtomeet

CommontoVarious

isolate

the

the trouble

within

level

limits.

RefertoTable

S-Parameters,onSer-

trouble.

the

Useapower

common

path.

noting

meter

..

Go

to

Figure

8-22,

A6

TroubleshootingonService

(Attenuator)

Sheet

4.

Assembly

Figure 8-8. .RFTroubleshooting

Table 8-3. Paths Common

From Test Channel Troubleshooting

to:

Various S-Parameter Switch Positions

Trouble in the trouble occurs. The following table indicates the table, set up equipment for calibration.. s-parameter positions a malfunction occurs..After loeationoftroublellas been narrowed the troubleshooting tree at the bottomofthe

TROUBLE

TO

S-PARAMETERS

Sll

and

Sll

and

S22

and

S22

and

Note some button. button. nal

874GB

test channel

STANDARD

J

COMMON COMMON

LOCATION·OF

S12

821

S12

821

the

trace.

display

other

S-PARAMETER

Press

Trace

within

W8,A881,A8S2,and W7,A781,A7S2,and

Wl1,

Wl0,

indication.

the

original

.05dBof

A7S2,

A8S2,

pushpushorigi-

can,-be

isolated

Iq~f3tionsof

Press

page

MODEL

A7S3,

A8S3,

Press

PATH

TROUBLE

and

NO

ONl

WITH

1------'-----

toi::an

the

..

Vf:

OCt>.

DCl..'

De2,.

De2

:'

RF pathbydetermining in which switch:

trouble by indicating common compol

various s-parameter pushbuttons and

OPTIONS

LO.CATIONOFTROUBLE

~

W7,

W8·,

Wl0,

Wll,

001&002

COMMON

A7S1,

ASS1,

A8S2,

A7S2,

Troubleshoot

....

;;..

connectorsinthe path

PATH

A7S2,

A8S2,

A8S3,

A7S3,

..

ONLY

WITH

and

DCl

DC2

switches

down,

and

common

n<

c,

SP

Of

an

me

Pa

po

Troubleshoot path

with

channel

Reflectometer

discontinuity).

signal)

the

an

(small

YES

~,

common

ohmmeter

or

8

..

Time

insertion

trouble

(no

test

Domain

loss

or

i

..

Parameter Switch Positions

by

determininginwhich switch positions the

Iebyindicating common components. To use

s-parameter pushbuttons and note in which

)uble has been narrowed down, continue with

Service

FORW2

REFERENCE

CONNECTION

LINE

'PTIONS

.OCATIONOFTROUBLE

W7,A7S1,A7S2,and

W8,

V10,

V1l,

--.

001&002

COMMON

A8Sl,

A8S2, A8S3,

A7S2,

Troubleshoot

connectorsinthe path.

PATH

A8S2,

A7S3,

ONLY

WITH

and

DCl

DC2

switches

and

common

SPECIAL

DC3,

W4,

andW9are

mon

to

ALL

Parameter positions

switch

trouble

NOTE:

A6,

W5

com-

S-

VV9

W3

A5

LINE

STRETCHER

RF

Circuits

SERVICE SHEET 1

8-18

W5

W10

Figure 8-9.

Service

TOP

Model 8746B

VIEW

VV9

W3

A5

LINE

STRETCHER

FORW2

REFERENCE

CONNECTION

LINE

:!rEFERENCE~

OUTPUT

CONNECTOR

8-18

Figure 8-9.

RF

Circuitry,

Top

View

A7 SWITCH

TREE

A

Model 8746B

BOTTOM VIEW

II

W4

A6

ATTENUATOR ASSEMBLY

Wll

DC3

RFINPUT

,~.,--JL

AS

.

SWITCH ASSEMBLY

Wl

TREE

B

SERVICE SHEET 1

De2

Figure 8-10.

RF

Circuitry,

W7

Bottom

DCl

View

rCH

TREE

:MBLY

DCIJ2

- - -

DCI

------------

DCfJI

I

~f

I

r

I L

RI

lSOOJ,lF

10

(NOT

I

OPTION

I I

dB

IN'

~!o

0(2)

I

+a

:

TZI!F

lc3

L_

~PI!F

B

DC2JI

r

-

C2

I I .

RZI2J.lF

1M

_ _

C5

~_5000p~

BIAS

~--

~------------

~

F2

r -

L

+a

C1

iZI!F

REMOTE

__

DCZJZ-E

~

-----,

20dB

R3

1M

_ _ _

INPUT

-----1

t

l

L2

.

20

~H

I

C8

5000pF

~_

C9

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---,

BIAS

F3

I

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-,

I

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DENT

I

CALTODCI

EXCEPT

WHERE

MARKED

!

I I

I

L_

- - - - -

~-

Figure 8-11.

-

---

PORT

- - - -

1 and

PORT

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--

2 Coupi.

--

--,

C9

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BIAS

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F3

-

----,

W2

W2P2

W3Jl

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REFERENCE ASSY

Cl-9 Jl-3 LI,2

Rl-3

NOTE:

DCl

AND

COUPLERS

DES1GNATI

DCl

DC2DIRECTI

ASSY Cl-9

Jl-3 Ll,2

Rl-3

NO

PREFIX

F2-S

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DC2

ONAL

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A6

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---l

NOTES:

1.

2.

3.

REFERENCE

A5

Jl,2

A7

Jl,2

A8

JI-3 DCl

JI-3

DC2

JI-3

DC3 J.1-3

OPTIONS

001,

REVERSE

OPTIONS

THESEWIRES

001

STANDARD

DESIGNATIONS

NO

PREFIX

WlJl,W W2Pl,2 W3Jl W3P-l W4Pl,2 W5Pl,2

W6Jl W6Pl W7Pl,2 W8Pl,2

002

ONLY.

AND

MODEL

FOR

002. ONLY.

W3Pl

A5J2

~:

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A6

ATTENUATOR

--OTO

- -

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IN

10

dB

STEPS

. I I I I t

./,,,,~

...

::-

- - - - , I

INCIDENT

ATTENUATION

II

A~J2

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A5J2

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A7

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A

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INPUT

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W5A

:

OR

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W5P2

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1

~

W5P2

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TO

A8J2

A7S2

(QS743~60~9)_

A7Jl

r

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--=----+--,j~

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(08743

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11)

r------

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+

WHEN

APPLIED,

MOVEASSHOWN

(TOWARD

VOLTAGE)

A7J3WIIPI

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,"

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VOLTAGE

SWITCHES

NEGATI

W6

-e

W7

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A8

SWITCH

TREE

B

ASS1(OS743

i------,

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IS

VE

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10)

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Service

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VOLTAGE)

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SWITCHES

NEGATI

IS

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A8S1(08743-60010)

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PORT

i

~

21

~

RFCIRCUITS

A5JASJA7.AB

Figure 8-12.

RF

Circuit.

8-19

SERVICE SHEET 2 S-PARAMETER LATCHING

Control pushbutton

associated

circuitry for each s-parameter

circuit, a

diode

remote-input

matrix

(not driver circuits. When latched, matrix, more information

LATCH CIRCUITRY

Each

together

which feeds this signaltothe

switch relays. See

concerning

latch

circuit consists

with

associated front-panel

RF

circuitry.

of

lamp.

to

Referring diode

curre~.t

A3CR9 (S22 circuit)

positive. This

Schematic2,note

of

A3Q8, flowing

action

turns

through

A3Q7 collector voltage. This voltage, A3Q8 A3R8, conducts. for

822

on,

duetothe

the

voltage

Thereisno

all driver

regenerative

drop

inputs

across

connection

shouldbelow.

AND

DRIVER

circuit,

present in

the

latch

Circuitry description

CIRCUIT

or

attenuation

and

a transistor latching circuit

DESCRIPTION

selection consists

822or0 dB circuits) feeding associated

circuit provides a +6 volt signaltothe

proper

driver(s). Each driver actuates

on

Service Sheet 1

forl!~further

with

diode

one

a pairofdirect-coupled complementary transistors,

that

conducts,

A3R1

on.

which

action

A3CR9

from

pushbuttonorremote

when

the

instrument

turning transistor A3Q8 on. The collector

7, will cause

Collector

current

is also appliedtothe

just

described. When current flows

drops below lOV and

S22

latch

circuittothe

input

and an indicator

is first

the

base

turned

of

A3Q7

on,

zener

to

through A3Q7 will lower its

baseofA3Q8, will keep

through

the

diode

no

longer

diode matrix since

of

an

go

or

SERVICE SHEET 2 (cont'.

volts. As through

a

harder. This regenerative ( and about voltage causes to

conduct, voltage. the

switch trees current ing direction, held

range

from Diodes

tive voltage causedbythe

and the

current

and

turning

the

output

A3R22)tothe

A3Q13

+24 volts,

are

saturated

the

switch

A3Q12/A3Q

which reverses

Current

through

actuate

also reverses

the

conducti

on

until

the

voltage

of~+3 volts

to

switchingonnoise.

A3CR16

A3Q14

and

protect

through

the

output

and

vol

ba

th

direct

~

A3el

the

tra

iJ

+

r,

dl

v(

excessive.

In

the

manual mode, pushbutton baseofA3Q2 A3Q1 drawn the

common

except The

latching circuit

.A3CR13,

other

through

by

the

A3Q1 flows through

emitter-resistor buss raises sufficiently

the

one

whose

and

thus transistor A3Q2's collector A3CR12. The +6 volts

In

remote

and7cannot

5

DRIVER

The

operation, +11 voltsisappliedtothe

conduct,

CIRCUITRY

+6 volt signal drivers are identical, so only Other

The

switch

tree

and

Their position depends

three

coils are in parallel and energize simultaneously. ReferringtoSwitch Tree A Driver, only time.

The

divider in

oneofthe

bases and emitters

the

emitter

the

A4

than

S22 (say

A3CR1

regenerative

pushbutton

output

to

the

switch tree drivers.

is

then

thus

from

the

drivers

operate

attenuator

upon

input

circuit maintains

pushbutton

811)

and

A3R1.

action

the

common

bussisat

is pushed,

common

Transistor A3Q2

common

(0 volts) is appliedtothe

turns

previously described. The additional current

emitter-resistor A3R8. The voltage

to

cut

is actuated.

is

applied

is

at

about

appliedtoboth

disabling

diode

the

driver feeding Switch Tree A willbeexplained.

to

the

diode matrix, A3CR10

For

example, when 811isselected,

+6 volts, which biases

switch

the

pushbuttons.

tree

drivers.

pushbutton

buss, so

matrixissuppliedtothe

in a similar manner.

relays are two-position, magnetically latched relays.

the

directionofcurrent flow through their coils. The

transistors, A3Q11orA3Q12, will

of

these transistors are tied together. The voltage

emitter

voltageatabout inputtoA3R18israisedto+6 volts, transistor A3Q12isturned on

causes A3CR14toconduct,

A3Ql2

A3Q13,

to

saturate. Transistor A3Q12's collector current provides base current

which turns

A3Ql3

providing a low

on.

The driver

emitter

output

impedance which allows

will begintorise toward +25

potential. When a

on, which

off

all latch circuits

turns

through

on

A3CR11 and

that

A3CR1, 3,

selected drivers. All

conductatanyone

+2 volts. When

the

on. Turning A3Q12

on on

to

: SHEET 2 (cont'd.)

~

the

output

A3R22)

~his

regenerative action will continue until A3Q12

~13

are saturated. When

4:

volts,

the

luses

A3Q12/A3Q13toshut

ct,

which reverses

;urrent

~h

through

trees

Iso reverses direction.

~ion,

the

until

the

~

+3 volts

~ching

on

voltage rises, feedback (dashed line

to

the

baseofA3Q12 will

the

driver

turn

output

switch trees actuate. Removing

off

and

A3Ql1/A3Q10

the

polarityofthe

the

switch tree relaysisreversed

actuateinthe

reverse direction. Feedback

As

feedback

conducting transistor,

driver's

current

A3Qll

voltage across A3R18 passes

to~+5 volts, preventing

the

noise.

or

through

relay driver

A2Q12

reaches

the

input

output

is chang-

A3Q12,

on

and

the

From

Preliminary

RefertoTable

this

service

and

A3TP7

these

voltages

the

Table.

is

Startingatthe trouble,

pare

tabletoisolate

measure

these

Troubleshooting,

8-5,

8-Parameter

sheet.

Measure

for

the

with

the

Voltages

compare.

~.

beginningofthe

voltages

with

the troubletothe

the

voltagesatA3TP5

selection

corresponding

YES

,

.~

at the test

the

voltages

Figure

Voltage

desired.

selection

points.

defective

8-2.

Table

on

Compare

voltages

path

Com-

listedinthe

circuit.

NO

R Gote

in

RF

Tn

~3CR16

ge

,14

nt ng

and

causedbythe

protect

through

the

and

output

A3CR17 provide a

path

for

the

relay's switching. Transistors A3Q9

driver

voltage across

transistors

output

offifthe

transistorsbysensing the

output

transistors

current

induc-

becomes

Figure 8-13. S-Parameter Troubleshooting

8-4. S-Param.eter Truth Table

Table

PARAMETER

8

11

S12 8

21

8

22

PARAMETER

(Standard

A

High Low High Low

(Opts.

SWITCH

c-

SWITCH

001

and

TREES

Model

TREES

002

Only)

B"

High High Low Low

Only)

High

Low

8

11

8

12

8

21

8

22

= > +

= <

6V

inputtoDriver

output

from

+2V

inputtoDriver

output

from

A

High High Low Low

NOTE

Driver.

High

Low Low Low

and>+24

and

<-24V

B

V

"

GotoFigure

RF

Troubleshooting

ubleshooting

8-8,

PARAMETER

S11

S12

S21

S22

NOTE: The voltages shownonP1 will occur only while s-parameter

Table 8-5. S-Para-meter Voltage

Pl

~+lV

~+9V

voltages are measured to common (any

7

P1

10

~+9V

~+lV

~+9V

~1t·

~+9V

P1

3

~9V

~+9V

~+lV

~+9V

Pl

13

~+9V

~+lV

~+9V

TP

1

~+2V

~+2V,

~+6V;

I

~+2V

w~ite-black

I

*A more accurate check consists in meastnlng

tor.

The saturated transistor is

voltage

of~+2V. The voltage

not exceed 1.2 volts.

the

1854-0012

(collector-~mitter)

TP2

~+6V

~+2V

the

,voltage drop

output

across

T£

TP

3

~+2V

~+6V

~+2V

wire),NC

transis.

the

f

~th

Table

TREES

IdelOnly)

B

High

Low Low

"REES

)02

Only)

B

High

Low Low Low

>+24V

<-24V

occur onlywhile s-parame"ter

Ion (any w\1ite-black wire), NOT CHASSIS GROUND.

the

s in measuring ;

the

1854-Q012

(collector-emitter) across

.voltage

output

pushbutton

drop

across

transistoronthe

the

saturated

the

is being depressed. All

saturated

schematic foraninput

output

transistor should

transis-

S-Parameter

Latch

& Driver Circuits

SERVICE SHEET 2

· -

...

-

8-20

Service

A4

Model

8746B

8-20

Figure 8-14.

P5

A4

Switch Panel Assembly, Parts Location

Model

8746B

A3

P2

SERVICE SHEET 2

Figure 8-15.

A3

Driver

Assembly,

Pl

Parts Location

HP 8746B Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual