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

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BIAS

REFERENCE

!

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~

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MEASUREM

REFERENCE

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ENT

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c:.

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NETWORK

8410A

e

Model

ANALYZER

HP

8414A

leo

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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