Agilent 85027A Operations Guide

OPERATING

AND

SERVICE MANUAL

~irector

US

P!avy

Cahbrat!on

Box16US
FPO

Naval

San

Francisco

Laboratory

Air

Station

96654-2901

HP

85027A/B/C

DIRECTIONAL

BRIDGE

to

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H

EWLETT

PACKARD

____

Hewlett-Packard
Video

Communications

5301

Stevens

PU

Box

58059

Santa

Clara,

408

246-4300

Creek

Cilifornia

Company

Division

Boulevard

95052-8059

h

P

HEWLETT

PACKARD

October
Jim

Government-Industry

GIDEP
Corona,

Subject:
Dear

Attachedisthe

Inregards
must

30,

Canton

Operations

California

Mr.

include

1997

Center

91718-8000

COPYRIGHT

Canton:

Copyright

to

thedocuments

the

following

Data

RELEASE

‘Copyright-Hewlett-Packard
Hewlett-Packard
butnot

purpose.

limited

Hewlett-Packard

consequential

material

or

damages

data.’

makes

to,

the

no

implied

in

Exchange

Document

you

have

legendand

Company

warranty

warranties

is

not

liable

connection

Program

Release

listed

disclaimer:

(HF).

of

any

of

forerrors

with

the

form

you

sentto

on

your

form

Reproduced

kind

with

regard

merchantability

contained

furnishing,

me.

thereproduced

with

HP

permission.

to

this

material,

and

fitness

herein

or

for

performance

documents

including,

foraparticular

incidental

or

useofthis

or

Please

let

me

know,ifyou

Sincerely,
HEWLErr-PACKARD

Dixie
GIDEP

Luebcke

Representative

have

COMPANY

U7

any

questions

orifI

can

beofany

furtherassistance.

MANUAL

CHANGES

Manual change
current

request
offices. When
supplement,

This
adapting the

supplements

and accurateaspossible. Hewlett-Packard

the

latest editionofthis supplement.

requesting copies,

or the

model

supplement

are

revisedasoftenasnecessarytokeep

quote

the manual

number

and

contains

manualtoinstruments

manual.
Two

typesofinformation are

UPDATES-APPLYTOALL
NUMBERED

The

informationisin

tial

order

To

use

this

CHANGES

CHANGES-UPDATES

the

with applicable

supplement,

indicatedinthe

NOTE

Free

print

date

important

recommends

copies

are

available

identification

from

information

the

title

page of the manual.

information

containing

manuals

that

you periodically

from

for

improvements

as

all

HP

from

your

correcting

made

included:

SERIAL

following order: UPDATES,

NUMBERS.

THAT

ARE

SERIAL NUMBER

NUMBERED

illustrationsascloseaspossibletoeach

make

all

UPDATES

following

pages.

and

all

appropriate

MANUAL IDENTIFICATION

HP

Number:HP85027A/B/C

Date

Printed:

July

Part Number:

manual

after

PREFIX

CHANGES in

numbered

serial

the

RELATED.

85027-90001

errors

and

printingofthe

sequen-

change.

number

1985

for

related

=

NEW

ITEM

UPDATES

Replace

~

JANUARY9,1987

the following

General

1-6

Performance

4-8

Adjustments

5-3

5-4

manual pages

Information

Tests

with

the

pagesinthis document (UPDATES):

us

r:~-:~’

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I’

HEWLETT
PACKARD

PrintedinU.S.A.

HP

85027A/B/C

Table

HP

General

1-1.

Specifications

85027A

Information

HP

85027B

HP

85027C

Frequency

Connector:

Range

Input

Test

Max.

Input Power

Directivity

0.01to12.4

12.4to18.0

2

GHz
Ghz

18.Oto2O.OGhz

20.0to26.5GHz

Test

Port

Match2

0.01

to

8.4

GHz

8.4to12.4GHz

12.4to18.0

GHz

18.Oto2O.OGhz

20.0to26.5

Ghz

(GHz)1

Port

0.01-18.0
TypeN(1)

APC-7

+23

dBm

±l0volts

>=4OdB
>=40

dB

—

—

or

0.01

-26.5

3.5mm

3.5mm
+23

dBm

±l0volts

>=40
>=40

>=4OdB
>=36dB

>=23dB >=23dB
>=l9dB

>

=

15

—

—

dB

>=l5dB

>

=15
>=l5dB
>=11

(f)

(f)

dB
dB

dB

dB

or

0.01-18.0

-

TypeN(f)

TypeN(f)

+23

dBm

±l0volts

>=36

>=34

—

—

>=23dB
>=l9dB

>

=

15

—

—

or

dB
dB

dB

3

0

2

0

Ui

E

I

E

S

U

—5

—

—10

Dynamic

SpeIfIce

I

—

15

Deite

‘Measured
‘Ru

at

‘25’Ci5’C

Power

lons*

—20

Power

I

vi

—‘5

(dB)

it

50

to

MHz

+7dBm

Accuracy

.

—~30

inputtobridge

-~

—~5

2

40

UPDATES

1-6

APPLYTOALL SERIALS

Equipment

Sweep Oscillator
RF

plug-in
Scalar
Cal.
50

network

analyzer

open/short

ohm

load 909A opt

Adapter*

*

A

second directional

under

Procedure

1.

test.

Setupthe

The

equipmentasshowninFigure

directional bridge,

2.

PRESET

the

analyzer.Itshould indicate
Preset should
modulation

3.

Set

the

on.

sweep oscillator

frequenciesinthe

HP

85027A/B/C

HP

85027A

HP

8350B

HP

83592A

HP

8757A

85021

-60021
012 909D

not

req’d

bridgeisrequiredasa

adapters recommended

not

the

directional bridge

also

preset

Performance

the

start

sweep

and

Test

are

oscillatortoa

stop

Record

Performance

HP

HP
HP
HP

Tests

85027B

8350B
83595A
8757A

HP

HP
HP

HP

85037-60001 85032-60001

909A opt

85027-60002

test

instrumentinadditiontothe

suitable

4-4,

under

that

InputAisonChannel1.Turn

with

for

use

with

the

calibrated open connectedtothe

test.

sweep

timeof200mswith

two

1250-1

similar

frequenciestocorrespondtothe

(0.01to8.4

GHz).

85027C

835DB
83592A

8757A

012

475

directional

bridges.

off

Channel2.The

27.8

first

band

bridge

test

kHz

of

4.

Performanopen/short

5.

Connect

the

directional

calibration
bridge

under

withanadapterifnecessary. Connect
bridge

6.

On

return

7.

Repeat

8.Ifthe
Test

under

theHP8757A

loss

test.

turnonthe

(highest

steps3through7for

test

Port

results

Match

(including
Performance

cursor

point)onthe

each

uncertainties)

manual.

Table

Frequency
Band

(GHz)

0.01-8.4

8.4-12.4

12.4-18.0

18.0-20.0

20.0-26.5

Uncertainty*

4-2.

HP

Spec.

>

=23

>=l9dB
>=l5dB

—

—

>=ldB

Test

85027A

Test
Result Result Result

dB

______

_____

_____

and

test to

and

trace.

storeitin

the50ohm

press

Enter

the

the

this

memory.

first

directional bridge,

loadtothe

[MAX]

valueonthe

frequency bandofinterest.

Test

Record,

Port Match

are not

Spec.

>

=23

>=l5dB
>=l5dB
>=l5dB
>=11

>=ldB

within

refertothe

Performance

HP

85027B

Test

dB

______

_____

_____

_____

dB

______

input portofthe

softkeyto

find

the

Performance

specifications

Troubleshooting

Test

Record

HP

Spec.

>

=23

>=19dB

>=l5dB

—

—

>=2dB

test

port

to test

directional

pointofminimum

Test

Record.

-as

indicatedonthe

sectionofthis

85027C

Test

dB

_______

_______

_______

port

UPDATES

4-8

APPLYTOALL SERIALS

5.

Remove

bridge

6.

Disconnect the power
nect

7.

On

8757A,

8.

Adjust

9.

Set

the

(additional

the

bridge

the

analyzer,

turn

on

R5

(see

the

attenuatorto30

printed,

labels are

input

porttothe

turn

smoothing

Figure

HP

85027A/B/C

plastic switch

available as

sensor from

attenuator,

on

averaging

(5%).

5-2)

foracursor

dB.

Adjust

Adjustments

configuration

HP

P/N

85027-80004).

the

attenuator.

leaving

(avg.

factor

=8),

readingof-6±0.1
R29

(Figure

label

from

Turn

the

test

and

the

dBm.

5-2)

foracursor

the

on

modulation.

port

open.

cursor.

back

On

reading

of

the

the

Con

HP

-

of

calibrated

10.

Set

the

±0.1

dBm.

11.

Repeat
dB

±0.1

DC

Adjustment

NOTE:

12.

13.

14.

15.

You

On

the

Set

the reference

On

the

On

the

ware revision
auto

calibration

16.

On

the

nates)toground.

-30dBminus6±0.1

attenuatorto0

dB

and

steps8through10until

dB

and,

with0dB

attenuation,

Procedure

can

perform this

HP

8757A,

set

DC

DC mode.

levelto-50

source,

analyzer,

turn

off

the

press

[CAL] [CONFIG

2.0orabove,

RF

press

OFF.

bridge,

useashort

dBm.

adjust

the

procedure

R29

(if

required)

changeinlevelisequaltothe

the

cursor indicates

only with

dBmatmidscreen,

power.

SYSTEM].Ifyour

[CAL]

jumper

to

and

short

select

padY(where

until

the cursor reads

calibrated

an

and

HP

the

8757A

-6±0.1

scaleto5

dBm.

analyzer.

dB/div.

analyzer

[MORE] [AUTOCAL],to

yellow

wire

has

-6

30

firm

turn

termi

-

-

17.

Adjust

50

dBm).

18.

Remove

Feedthru

19.

On

the

20.

Adjust
averaging

NOTE:

R25

the

Null

Adjustment

analyzer,

RiO

and

(Figure

short,

(Figure

5-2)

foraminimum

and

turn

Procedure

press

5-2)

[CAL]

for

smoothing

Steps19and20must

UPDATES

auto

cal

and

as

HIGHatrace

mask

be

adjustment

repeated

APPLYTOALL SERIALS

readingonthe analyzer

back

ON.

select

[DC

DET

ZERO]

as possible.

effects.

until

no

further

5-3

(it

should

[AUTOZERO].

Adjust

-

slowly,

changeisnoted.

be

<-

because

DC

21.

22.

23.

24.

25.

Mode

On

the

Set

On

the
on.
The

Set
The

RF

Adjustment

source,

the

attenuatorto0

analyzer,
Allow the
cursor

the

cursor

should

attenuatorto30

should

turn

verify

trace

Check

on

dB.

to

now

now

HP

85027A/B/C

the

RF

power.

DC mode,

settle.

indicate

dB.

indicate

Adjustments

averaging, smoothing,

Press

0.0

the

[DISPLAY][MEAS-.MEM][MEAS-MEM].

dB.

calibrated

-30dBto

and

within

the cursor are still

0.8

dB.

26.Ifthe

value
necessarytoadjust
dB

attenuator settingsisjust

when

27.Ifany

the

adjustments are

Procedure

0.1

dB

indicatedinsteps8through

difference

28.

Both

AC

and

statedinTable

indicated

attenuator

again,

only

between

DC

dynamic

1-1.

is not

R5

and

settingis0

made,itwill

this

time

the

two

modesofoperation.

accuracy

within

R29

within

dB

0.8

until

and

dB

the

0.8

dB

R29

be

necessarytorepeat the

usingatolerance

11.

specifications

of

the

calibrated

difference

of

the

calibrated30dB.

whenat30

limitof±

This

will

shouldbewithin

-30

dB,Itmay

between the0dB

dB.

AC

0.8

dB

insteadofthe

allow

you

to

split

and

Adjust

Adjustment

the

error

the

limits

be

30

R5

UPDATES

5-4

APPLYTOALL SERIALS

HP

85027A/B,/C

DIRECTIONAL

SERIAL

This

manual
directional
follows:

For

additional

to

INSTRUMENTS

Section1and BACKDATING,

HP
HP
HP

applies directly to

bridge

Model

85027A
85027B
85027C

information

NUMBERS

with

serial

COVERED

about

BRIDGE

the

HP

85027A/B/C

numbers prefixed

Serial

serial numbers, refer

Section

2522A
2522A
2522A

BY

MANUAL

7.

Prefix

as

in

MANUAL

Microfiche

PART

Part

NUMBER
Number

85027-90002

©

Copyright

1400

FOUNTAINGROVE

85027-90001

HEwLETr-PAcKARD

PARKWAY,

U.

-

Box

FF0

SANTA

i~-

~

San

FI~r~C~

COMPANY

ROSA,CA95401

-

~

U.S.A.

-

4

F

1985

Printed:

JULY

1985

HEWLETT

PACKARD

HP

85027A/B/C

Table

CONTENTS

of

Contents

Section

GENERAL

Introduction
Specifications
Safety
Instruments
Description

Equipment

Scalar

Swept

Detectors

Power
Equipment
Accessories
Recommended

Warranty

2

INSTALLATION

Introduction
Initial
Preparation

Power

Connecting

Mating
Operating

Storage

Environment
Packaging

3

OPERATION

Introduction
Operating
Connector

Operating
Operator’sCheck

Equipment
Procedure

INFORMATION

Considerations

Covered

Required

NetworkAnalyzer

HP

8757A

HP

8756A

HP

8755C

HP
HP

Signal

8350B

8340A

Source

HP8341A

Splitters

Available

Available

Test Equipment

Restrictions

Inspection

for

Requirements

the

Connectors

Environment

and

Shipment 2-3

Precautions

Wear

Instructions

Page

1-1
1-1

1-1
1-1

by

Manual

1-1
1-3

But

Not

Supplied

1-3
1-3

1-3
1-3
1-4

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

1-4

1-4

1-4

1-4

1-5

1-5
2-1

2-1

2-1

Use 2-2

2-2

HP

85027

2-2
2-2

2-3
2-3

2-3

3-1

3-1

3-1

3-1

3-1

3-4

3-4

3-4

1

4

PERFORMANCE

Introduction
Performance
Directivity

Description
Equipment

Procedure

Test

Specifications
Description
Equipment
Procedure

DynamicPower

Specifications
Description

Equipment
Procedure

5

ADJUSTMENTS

Introduction
Adjustment

AC
DC

Feedthru
DC

6

REPLACEABLE

Introduction
Exchange
Replaceable

Organization

Information

Ordering

7

MANUAL

Introduction

Application

8

SERVICE

Introduction
Theory
Troubleshooting

GainingInternal
Cable

Power
Input

Microcircuit
A2

Al
Power

Signal
Clock/Control

Connector

Visual
Mechanical

Test

Below2GHz
Above20Hz

PortMatch

Procedures

Adjustment
Adjustment

Null

Mode

RF

PARTS

Assemblies

Parts

Information
BACKDATING

of

Operation

ContinuityCheck

Cable

Port

and

Check

Circuit
Bridge

Board

Microcircuit

Supply Check

Path

Check

Inspection

Inspection

Inspection
Gaging
Gaging

the
the

HP

85027A/B/C

Table

of

Contents

TESTS 4-I

4-1

Record

4-1

4-1
4-I
4-2

4-2

4..3
4-4

4-7
4-7

4-7
4-8
4-8

Accuracy

(AC

and

DC)

4-9
4-9

4-9
4-10

Procedure

Procedure

Adjustment

Adjustment

Procedure

Check

List

CHANGES

Procedures

Access 8-2

Replacement

Test Port

Assembly

Resistance

Replacement

Assembly

Checks

Replacement

Check

Precision
APC-7

3.5mm

Connector

Connector

4-9
5-1

5-1
5-1

5-2
5-3

5-3
5-4
6-1
6-1
6-1
6-1

6-1
6-1

6-2
7-1

7-1
7-1

8-1
8-1

8-I
8-2

8-2
8-3

8-3
8-3

8-4
8-4

8-5
8-7
8-7

8-7
8-7
8-9
8-9
8-14

11

HP

85027A/B/C

Table

FIGURES

of

Contents

Figure

1-1
1-2

3-1
3-2

3-3
3-4

3-5

Title

HP

85027A

HP

85027A,

HP

85027B

HP

85027

Typical
Typical

Typical

4-I Directivity
4-2
4-3 Signal
4-4

4-5
5-1

5-2
6-lA HP

6-1
6-lC
6-2 A2
6-3 A2

Probable
Test Port

DynamicPower
Adjustment

Locations

85027A

B

HP

85027B

HP

85027C
Circuit
Circuit

Separation

Directional

85027B

with

Connector

BridgeinAccessoryCase

and

Features(Rear

Operator’s
Measurement

Measurement

Check

Setup
Setup

Performance

Range

of

Directivity

Chart

MatchPerformance

Accuracy

Setup

of

Adjustment

Replaceable

Replaceable
Replaceable

Board

Board

Component
Component

85027C

Directional

Saver

View)
Using

Test

Using

Using

Setup

HP

8757A

HP
Power

Values

Test

Setup

Performance

Potentiometers

Parts

Parts
Parts

Identification

identification

Identification
Location
Location

Bridges

8757A

Splitter

Test

Setup

(Component

(Solder

Side)

Supplied

Side)

Page

1-0
1-2

3-2
3-3

3-4
3-6

3-6
4-2

4-3
4-5
4-7

4-9

5-1
5-2

6-5

6-7
6-9
6-1

6-1

1
1

8-1

A2
8-2 A2
8-3

Cleaning
8-4 SMA
8-5

8-6
8-7

8-8
8-9

8-10
8-11

Precision

Zeroing

Measuring Precision

The

Zeroingthe

Gaging

Collet

Circuit Board

Power

Supply

Circuit Board Schematic

APC-7

and

Precision

3.5mm

Precision

Connectors

3.5mm

MaleConnector

3.5mm

Male

3.5mm

APC-7

Connector

APC-7

APC-7

Removal

Gauge

Gauge

Connectors

and

Replacement,

Check

Points 8-5

8-6
8-8

Connectors 8-10

Connector

Male

Gauge

Gauge

Connectors

8-1
8-12

8-13
8-15

8-16
8-17

APC-7

Connectors

8-18

1

111

HP

85027A/B/C

Table

TABLES

of

Contents

Table

I-I

1-2

1-3

1-4

1-5

2-1
4-i Directivity

4-2
4-3

6-1
6-2

6-3A
6-3B
6-3C
6-4 A2

7-1
8-1

Title
Specifications

Supplemental
System
Accessories
Recommended

Contents

Test
DynamicPower

Exchange
Manufacturers

and
HP
HP
HP

Manual
Conductors

Verification

PortMatch Performance

Abbreviations
85027A
85027B
85027C

CircuitBoard

Characteristics

Kits

Available(Adapters and

Test

Equipment

of

HP

85027

Performance

Accuracy

Microcircuit

Code

Replaceable

Replaceable

Replaceable

Backdating

in

Power

Directional

Test

Bridge

List,

Parts

Parts

Parts

Assembly

Changes

Cable

Performance

Reference

General)

Bridges

Record

Test

Record

Assemblies

Designators

Replaceable

By

Serial

Wi

Test

Parts

Number

Record

Prefix

Page

1-6
1-8
1-9
1-9

1-10
2-1
4-6

4-8
4-10

6-2
6-2

6-4
6-6
6-8
6-10

7-1
8-3

iv

HP

85027A/B/C

General

Information

Figure

1-1.

1-IP

85027B

in

Accessory Case

1-0

Supplied

HP

85027A/B/C

General

Information

INTRODUCTION

You

will

find

operatingand service
85027B
shareacommon
85027Binits
bridges.
characteristics,
basic

Youmay
manual

manual changes
SPECiFICATIONS

Table
are

lists
usefulintest

and

85027C

caseisillustrated

The

rest

information.

order

(in

4 x 6

i-I

lists

performance

supplemental

applications.

safety

the

directional

traitor

of

this

inch

supplement

specifications

standards

characteristics,

procedure,

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1-9

HP

85027A/B/C

General

Information

Instrument
Scalar

Network
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85027

8757A

Specifications

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0.01

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1-10

HP

85027A/B/C

Installation

INTRODUCTION

This

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than

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8,

±10

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m

2-1

HP

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Installation

CAUTION

Electrostatic
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Protect the
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PREPARATIONFOR

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85027A/B/C

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STORAGE

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INTRODUCTION

This

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bridges.

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CONNECTOR

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dramatically

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SECTION

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CAUTION

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INSTRUCTIONS

85027

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3-2.

H P

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HP

85027A/B/C

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OPERATOR’S

Figure

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in

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HP

Typical

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3-6

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HP

85027A/B/C

Performance

Tests

INTRODUCTION

The

proceduresinthis

of

theHP85027
performance
incorporatedinTables

required.
exceeds
without

PERFORMANCE

Tabulate
performance
acceptable

comparison

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DIRECTIVITY

Description

You
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test results

PERFORMANCE

section

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to

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MEASURED

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33.2

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34.9

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Directivity

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the

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85027A/B/C

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perform

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Tests

troubleshooting

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Above2GHz:

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measured

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the

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the

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the

axis

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4-4

HP

85027A/B/C

24

22

20

18

16

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~

12

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10

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12.

13.

14.

15.

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4

Figure

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24 26

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of

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on
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the

load

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for

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othem

the

axis

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the

start

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source

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next

band

of

interest

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HP

85027A/B/C

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Frequency
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(0Hz)

0.01-2.0

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I

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20.0~26.5*
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HP

Scalar

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PerformanceTest

85027

of

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Record

Limit

Figure

4-2)

4-6

HP

85027A/B/C

Performance

Tests

TEST
Specifications

The
Performance

Description
Usingatypical

directional
bridge

properly

PORT

test

under

MATCH

poi-t

match specifications

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are

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the

TEST

HP

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PORT

and

in

Table

of

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the

RF

4-2,

bridge

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4-4, a

under

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second

test.

must

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The

Figure

4-4.

Test

Port

Match Performance

4-7

Test

Setup

Equipment

HP

85027A/B/C

HP

85027A

Performance

HP

Tests

85027B

HP

85027C

Sweep

RF
Scalar
Cal.

50

oscillator

plug-in

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ohm load

analyzer

HP

HP
HP
85021-60021 85037-60001 85032-60001

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second

bridge

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test.

bridgeisrequired

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adapters

recommended

bridges.

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1.

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up

the

2.

4.

3.

to

the

test

PRESET
Channel

200

ms

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the

of

frequencies

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equipment
directional

the analyzer.

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with

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sweep

oscillator

in

an

open/short

as

bridge,

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kHz

the

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showninFigure

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should also

modulation

start

calibration

835013
83592A
8757A

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the

directional

indicate

preset

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stop

frequencies

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and

HP

8350B

HP

83595A

HP

8757A

909D 909A

85027-60002

instrunient

are

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the

sweep

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bridge

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in

for

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calibrated

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HP
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test.

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GHz).

8350B
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two

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open

connected

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band

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test

port

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6.

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the

point
Performance

7.

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the

on

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section

Frequency
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0.0

(GHz)

1-8.4

8.4-12.4

12.4-18.0

18.0-20.0

20.0-26.5
Uncertainity*

directional

with

an

adapter

directional

HP

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of

minimum

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turn

return

Test Record.

steps3through7for

test results

Test Port

of

this

(including

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manual.

Table

Spec.

HP

4-2.

85027A

Test
Result

>=23

dB

_______

>=

19

dB

_______

>=

17

dB

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1dB

bridge

if

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under

on

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loss

each

uncertainties)

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under

test to

the

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test.

cursor

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and

point)

press

frequency

are

Test Record,

Match Performance

HP

85027B

Spec.

dB

>=15

dB

>=

15

dB

>=

15

dB

>=1

1

dB

1dB

first

the

on

the

band

not

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Result

_______

_______

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directional

50

[MAX]

trace.

of

interest.

within

refer

Test

bridge,

ohm load

softkey

Enter

this

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to

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Record

HP

Spec.

dB

>=

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2dB

to

the

to

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85027C

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Result

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test

portto

input

the
on

indicated

port

the

4-8

HP

85027A/B/C

Performance

Tests

*Approxin-~ateuncertainity

DYNAMIC

POWER

ACCURACY (AC and DC)

Specifications

The

dynamic

incorporated

power

in

Table

accuracy

4-3,
Description
Using

HP

the

85027.

setup illustrated

excluding

effect

specifications

DynamicPower

in

Figure

4-5tomeasure

of

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for

the

Accuracy,

adapter

bridge

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used.

in

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thedynamic

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mode

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poweraccuracy

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Scalar

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attenuator

ONLY

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IFNP83508

SERIAL PREFIX
2436ORBELOW.

HAS

Figure

4-5.

Dynamic

HP

85027A

HP

835011

HP

83592A

HP

8757A

85021-60001

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8495B

BRIDGE

Power A ccuracv

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HP

HP

HP
85037-60001
85027-60002

opt

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4-9

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85027B

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Setup

HP85027C

HP

835011

HP

83592A

HP

8757A

1

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minutes

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the

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On theanalyzer,

[MEAS-MEM].

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of

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of

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results.

nominal

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overcome

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the

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warm-up.

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RF

plug-inasrequired

attenuator

down

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linesofTable

the

test results should be

Table

4-3.

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setting

of,

this

attenuation

HP

85027A/B/C

as

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to0dB

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on

the

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each

setting.

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the

instruments

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press [MEAS-->MEM]

reading.

and

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the

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actually

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MHz

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10

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the

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8.

9.

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0

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-30

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If

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believe

removing

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the

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source

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Troubleshooting.
If

you

are

using

an

HP

8757A
power
short/open

accuracy,returnto

calibration

by

the

pressing

[SHORT/OPEN] [DISPLAY]

Perform

Delta

steps3through8and

Table

Power

4-3.

Dynamic

AC/DC

Power

Spec

Actual

dB

dB
dB

________

______

________

________

______

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-10±0.4dB

-20±0.4

-30±0.5

dB
dB

-40±1.0dB

of

cr1-or
not

with

SYSTEM

these

and

[MEAS-MEM].

enter

Accuracy

from

meet

the

the

the

test resultsasnoted

its

specifications,

bridge

menu, select

keys:

resultsinthe

and

wishtotest

DC

[SYSTEM] [MODE] [CAL]

fourth

Performance

AC

Test

Result

______ ______

________ ________

________ ________

______ ______

refer

mode

Test

DC

to

its
and

column

Record

Test

Result

above

Section

DC

dynamic

perform

of

you

8,

Table

a

4-3.

4-10

HP

85027A/B/C

Adjustments

INTRODUCTION

You

do

not

have

normal

(Al)

match
85027

adjustments

ADJ

use.

However,

or

the

circuit

the

preamplifier

does

not

in

USTMENT

P05ZBLANK

to

make

if you

board

to

pass one

this section.

PROCEDURES

any

repair

assembly

the

characteristics

of

its

performance

SECTION

ADJ

USTMENTS

adjustments

oi-

replace

(A2),

you

to

the

the

must

of

the

tests you

5

HP

85027

internal

makethe

microcircuit.

may

for

bridge

following

need

to perform

regular

calibration

microcircuit

adjustments

Additionally,

P05ZBLANK

assembly

if

the

the

or

to

HP

Note:

to perform

adjustment

ONLY

REQUIRED

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SERIAL PREFIX

2436ORBELOW.

HAS

the

potentiometers.

following

NOT

TERMINAT

Figure

adjustments

ED

BRIDGE

5-1.Adjustment

refer

to

5-1

Setup

Figure

5-2

for

the

locations

of

the

HP

85027A/B/C

Adjustments

AC

Adjustment Procedure

1.

Set

up

the

equipment

2.

3.

4.

power
locations

Connect the

Set
Preset

Adjust

the

meter

of

If

your

exactly
and

30dB

about
procedure

30.06

the

attenuator

the analyzer.

the

output

modulation.

Figure

and

the

adjustments.

power

attenuator

how

settings.

+13

referstocalibrated

dB.

5-2.

as

showninFigure

allow

dBmat50

forareading

30

meter

does not have calibration data,

much

for0dB.

Set

the

the

LocationsofA

minutes

sensortothe

attenuation

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MHz

sourcetogenerate

of

for

NOTE

this

CW.

30

+6.5

djustment

5-1.

Turn

warm-up.

calibrated

changes

with

the

Use

this

dB;

for

50

dBm on

Potentiometers

on

the

Refer

10

dB step

between

source

figure

example,

MHz

the

power

analyzer,

to

Figure

attenuator.

determine

the

0dB

set

for

when

CW

29.9

meter

the

dB

without

source

5-2

for

or

modulation.

and

then

and

turn

on

5-2

5.

6.

7.

8.

9.

On

the

back

explains

be
Disconnect

the modulation
to

the
On the
On

Adjust
Set

ordered

attenuator.

HP

the

also

the

the

attenuator

the

as
the

8757A

HP

bridge’s

HP

85027A/B/C

of

the

bridgeisa

switch

configuration.

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powei-

frequency

8757A

sensor

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or

8756A,

gain

for

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must be

the

turn

potentiometer

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printed,

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test

turn

on

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Removethe

the
correct).

port

open.

on

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smoothing

the

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self-adhesive

label.

attenuator.

Connectthe

averaging

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(R5)

foracursor

bridge’s

plastic

Turn

(8,

defaultfactor).

load

label

(Note:

potentiometer

additional

on

the modulation

input

default

reading

withanote

port

of

factor)

of-6±0.1

(R29)

that

labels

the

and cursor.

may

(note:

bridge

dBm.

for

a

cursor

10.

Set
the

11.

Repeat

±0.1

DC Adjustment

12.

Set

13.

Set
dB/division.

14.

Turn

15.

Configure

16.

On
ground

reading

the

attenuator

cursor

steps8through

dB

and

This
analyzer.

the

HP

the

analyzer’s

off

the

bi-idge,

withashort

of

calibrated

to0dB

indicates-6±0.1

the

cursor

Procedure

DC

procedure

8757AtoDC

reference

the

RF

power

the

system by

temporarily

jumper.

-30 dB minus

and

i-eadjust

dBm.

10

until

the

with0dB

can

be

performed

mode.

level

from

the

pressing

short

6±0.1

the

change

attenuation

NOTE

to -50 dBmatmidscreen

source.

[CAL][CONFIG

pad

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(where

dBm.

gain

potentiometer

in levelisequal

indicates

only with an

SYSTEM]

the

yellow

(if

to

the

-6±0.ldBm.

HP

8757A

withascale

on the analyzer.

wire terminates)

required)

calibrated

of

until

5

30

to

dB

17.

Adjust
analyzer.

18.

Removethe

Feedthru

19.

Press

for
connected

20.

Adjust

possible.
effects

the

bridge

It should be

Null

Adjustment

[SYS] [CAL] [DC

the AUTOZERO

through

the

bridge

Work

of

your

Offset

short

completely.

“feedthru

slowlyasthe
adjustments.

potentiometer

less

Procedure

DET

feature

the

System

than

ZERO]

to

Interface.

null”

averaging

-50

(R25)

dBm.

[AUTOZERO] on the

function,the

potentiometer

5-3

foraminimum

analyzer

(RiO)

and

smoothing

I-eading

HP

8757A.

and

source

forasHIGHatrace

features

must be

will

on the

Note

mask

that

as

the

HP

85027A/B/C

Adjustments

NOTE

DC

Mode

21.

Turn

22.

Connectthe

23. Set

24.

Preset
output

25.

Disconnect
bridge

26.

On

factor)

27.

ONLY

potentiometer

28. Set
minus
reading.

Steps 19

noted.

RF

Adjustment

on

the

the

attenuator

the

source.

forareading

to

the

the

analyzem~,

and
if the

the

attenuator

6+-0.8dBm,

and

source
power

the

powei-

attenuator.

confirmthat

the

cursor

cursor

(R5)

20

must

Check

RF.

meter

for0dB.

Setitto

foracursor

for

adjustthe

sensortothe

of

+6.5

sensor

Leave

ai-e

does

not

30

dB.

generate

on.

be

rel)eated

dBm on

from

the

the

smoothing

indicate

reading

Only

bridge’s

until

calibrated

50

MHz

the

power

attenuatom~.

test

port

(5%,

-6±0.8
of

0±0.8

if the

cursor

load

potentiometer

no

further change

10

dB

step

CW

without

meter.

Connectthe

open.

defaultfactor),averaging

dBm,

adjustthe

dB.

does

modulation.

not

indicatecalibrated

(R29)

is

attenuatoi-.

input

bridge’s

for

that

Adjust

port

gain

cursor

(8,

of

the

default

-30

the

29. Set
the

30.

Repeat
calibrated
dB.

the

attenuator

cursor

indicates

steps

30

to0dB

-6±0.8

27

thi-ough30ONLY

dB

±0.8

dB

and

and
dBm.

readjust

the

cursor

until

the

gain

the

change

with0dB

potentiometer

in

levelisequal

attenuation

(if

required)

to

indicates

the

-6

until

dB±0.8

5-4

HP

85027A/B/C

Replaceable

Parts

INTRODUCTION

This

section

blies

available.
respond
abbreviations

placeable
replaceable
A2

Circuit

Figui-es

for

the3bridges.

6-2

shows

placeable

EXCHANGE
You

may
considerablecost
the

reference

and

theii­m~ealize
by

the

contains

Table

to

the

manufacturers’

usedinthe replaceable

parts

lists

partsinreference

Board,

6-lA,

the
new

6-lB

thecomponent

parts.

ASSEMBLIES

replace,

termination.

HP

part

cost

savings.

assembly

information

6-2

for

common

and

The

circuit

on

an

saving.

numbers.

part

REPLACEABLE

for

lists

(1)

the

code

numbers

the

HP

85027A, 85027B

designator

to

all

three

6-iC

show

side,

exchange

This

Table

The

Thus, assemblies

number.

the major

board

Figure

assembly includes

assembly

basis,

6-i
defective

SECTION

ordering

names
parts

6-3 shows

lists

and

and

list.

order.

bridges.

assembly

the

bridge

these

assemblies must be

required

6

PARTS

parts.

addresses

(2)

Tables

and

Table

(A2)

the

the

factory

for

Table

reference

85027C

for

solder

microcircuit

input

spare

6-1

lists

of

manufacturers

dçsignatordefinitionsand

6-3A,
6-4

and

6-3B

respectively.

lists

thereplaceable

miscellaneous

all3bridgesisthe

side,

Table

and

test

repaired

returned

parts

the

exchange

and

6-3C

parts

same.

6-2

lists

assembly

port

and

stock must be

and

connectors

tested

for

assem

which

are

there-

They

list

pai-ts

locations

Figure

itsre-

realize

assemblies

credit

to

ordered

cor

the
of

and

-

-

a

REPLACEABLE
Organization

Table

Information
The

6-3isthe

a.

Electrical

designation.

b.

Major

c.

Options.

d.

Miscellaneous

following

a.

The

b.

Thepart

c.

The

the

assemblies

information

Hewlett-Packard

total

total

PARTS

listofreplaceable

assemblies

number

quantity

quantity

LIST

and

and

cables.

(including

is

part

check

(Qty)inthe

illustrated

tabulated

parts

their

components

mechanical

number.

digit

(CD).

instrument

therein.

andisorganized

in

alpha-numerical

and

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for

each

entry:

or, if

as follows:

accompanied

oi-der

parts.

by

an

by

reference

illustration,

d.

The

description

of

the

part.

6-i

HP

e.

The

five

digit

code

of

f.

The

manufacturer’s

The

total

quantity

of

the

partinthe

ORDERING INFORMATION

To

orderapart
number
dress

the

(with

order

listedinthe

check

digittoensure

to

the

for

list.

nearest

part

each

Replaceable

85O27A/B/C Replaceable

the

typical

number

partisgiven only once,atthe

Hewlett-Packard

manufacturerofthe

for

the

part.

NOTE

Parts

List,

efficient

processing)

office.

indicate

Parts

and

part.

first

appearance

the

Hewlett-Packard

the

quantity

desired.

part

Ad

-

To orderapart

model
desired.

and

serial

Address

BRIDGE

HP

85027A

HP

85027B

HP

85027C

Table

Code

04713
06383

06665
24546

25088
27014
28480

32997

6-2.

thatisnot

number,

the order

Table

Manufacturers

Manufacturer

Motorola

PanduitCorp

Precision
Corning

Siemans

National
Hewlett-Packard

Bourns

listedinthe

the

to

6-1.

NEW PART EXCHANGE
NUMBER

5086-7376 5086-6376

5086-7377

5086-7399 5086-6399

MANUFACTURERS

SemiconductorProducts

Monoliths

Glass
Corp

Semiconductor

Inc

Trimpot

description

the

nearest

Exchange

Code

Inc

Works

Co

Corporate

Prod

(Bradford)

Replaceable

and

function

Hewlett-Packardoffice.

Microcircuit

List,

Reference

Corp

Div

Parts

of

BridgeAssemblies

PART

5086-6377

HQ

NUMBER

Designators

CODE LIST

Address

Phoenix

Tinley

SantaClara
Bradford

Iselin
SantaClara
Palo Alto

Riverside

List,

include

the

part

(REBUILT)

AZ

Park

PA

NJ

CA

CA

the

instrument

and

the

quantity

and A

IL 60477

CA

CA

bbreviations

Zip Code

85008
95050

16701
08830
95051
94304
92507

A

assembly

AT

termination

C

capacitor

CR

diode

J

jack

L

inductor

MP

miscellaneous

REFERENCE

assembly

part

DESIGNATORS

R resistor
TP

test

point

S

switch

U

integrated

YR

diode

W

cable

6-2

circuit

HP

85027A/B/C

Replaceable

ABBREVIATIONS

Parts

ADJ

ASSY
BD
CER
DBLHX
FXD

G

K
MA
MEG
MFR
MHZ

PF

PRCN
RGLTR

adjustable

assembly
board
ceramic
double
fixed

giga

1000
milli-amp
million (106)
manufacturer
megahertz
picofarad
precision
regulator

camfered,

(1O~)

hex

RMS

SGL

SI
SIG

SLDR
STR

TA

THD

TML

TRMR

TRN
UF
VDC

W
ZNR

root-mean-square
signal

silicon
signal

solder
straight

tantalum
thread
terminal
trimmer

turn
microfarad

volts,

direct

watt
zener

current

6-3

HP

85O27A/B/C

Replaceable

Parts

Reference

Designation

Al

Al
A2~~

AT

1

Jl

.12
J2MP1

J2MP2

J2MP3

MP

1

MP2
MP3

MP4
MP5
MP6
MP7
MPB

MP9
MP1O
MP1

1
MP12
MP13

MP14
MP15’
MP16
MP17
MP18~

MP19
MP2O
MP2

1
MP22

MP23~
Wi

HP

Part

Number

5086-7

376

5086-6376
85027-60001

P10

Al

P/0

Al

P/O

Al

1250-1837
1250-1465

1250-1839

85027-00001

8502

7-20005

85027-2000

85027-20004
0535-0694
2

190-0584
0359-1190
0515-14

17

1531-0289

051

5-0820

051

5-0820

85027-80001

1400-0249
85027-80009

85027-80012

9211-0126

8502

7-80004

85027-80005
85027-80006

1250-1475
85021

-80001

85025-6000
85027-90001

Table

C
D

4
2

2

5
5

6
2
0

3

3
0

4

3

2
4

B
5

8

5
5

4
0

2
7

9
7

8

9
7

6

2

3

5

6-3A.

Qty

85027A

BRIDGE
BRIDGE

CIRCUIT
TERMINATION
INPUT
TEST
BARREL-RF

COMPONENT-RF
CONTACT-RF

DRESS COVER
CABLE
EXTRUDED

PORT

NUTM-DBLHX

LOCKWASHER

TML
SCREW-THD-RLGM3X

MACHINEDPART-SST

SCREW-MACHM2X0.4

SCREW-MACHM2X0.4

ID
CABLE

INSTRUMENT

FOAM

NOT

CARTON-CORR

LABELINRFINTEST

LABEL WARNING

LABELID85027A

NOT

ADAPTER-COAX

7MM OPEN/SHORT

CABLE

OPERATING

~NOTSHOWN

~~SEE

HP

REPLACEABLE PARTS

MICROCIRCUIT
MICROCIRCUIT

BOARD

ASSEMBLY

CARTRIDGE

CONNECTOR

PORT

CONNECTOR
CONNECTOR

CONNECTOR

COVER

HOUSING

COVER

M3.0

STUD

SGL-PIN

LABEL 85027A

TIE

.062-.625-DIA .091-WD

CASE

PAD

ASSIGNED

ASSIGNED

ASSY

TABLE

RSC11.5-IN-LG

AND

6-4

85027A

Description

ASSEMBLY

ASSEMBLY (REBUILT)

15.9MM

CONNECTOR

MAXIMUM

STIR

ASSEMBLY

SERVICE

APC-7 COUPLING

APC-7

0.5

1OMM-LG

SPACER-BRIDGE

5MM-LG
5MM-LG 90-DEG-FLH-HD

8.625-IN-WD

INPUT

M-PRCNNM-PRCN

MANUAL

Replaceable

(NEW)

DIAX30

MM

SERIES

90-DEG-FLH-HD

NYL

N

Parts

Mir

Code

28480
28480

29480
28480
28480
28480
28480

28480
28480

28480
28480
28480

28480
28460

28480
28480

28480
28480

26480
28480

28480
05383

28480
28480

28480
28480

28480
28480

28450
28480

28480
28480

5086-7

376

5085-6376
85027-6000

P/O

Al

P/O

Al

P/0

Al

1250-1837
1250-1465

1250-1839
85027-00001
85027-20005
85027-20003

85027-20004
0535-0694

2190-0564
0369-1190

0515-1417

1531-0289

0515-0820
0515-0820

85027-80001
PLT1

M-8

85027-80009
85027-80012

9211-0125

85027-80004

85027-80005
85027-80006

1250-1475
85021

-60001

85025-60003
85027-9000

Mfr

1

1

Part

Number

S..lnI~

(!(~(I,.,,t.II)ku.cIi.,.

6-4

MP3

MP2O

(NOT

VISIBLE)

HP

85027A/B/C

Replaceable

Parts

Ji

Al

MP2

MP5~/

MP19

(NOT

VISIBLE)

MP1

MP18

(REMOVED
TO

SHOW

INTERIOR)

~~~—~--—---

MP6
(FOUR

(NOT

TIMES)

VISIBLE)

J2MP1

J2MP3

MP1O
MP9

(FOUR

(NOT

(NOT

VISIBLE)

TIMES)

VISIBLE)

Only

the

parts listed are replaceable. Any

any

disassembly

Section8of
nectors

can

Figure

this

be

6-lA.

or

repair

manual

repaired

HP

CAUTION

procedure

will

or

replaced

85027A

not

void

the

warranty.

only

Replaceable

6-5

attempttoperform

specifically

outlined

Damaged

by

Hewlett-Packard.

Parts

Identification

in

con

-

HP

85027A/B/C

Replaceable

Parts

Reference

Designation

Al

Al

A2”
AT1
J1
J2
MP1

MP2
MP3

MP4
MP5

MP6~
MP7

MP8
MP9

MP1O

MP1

1

MP12~
MP1

3~
MP14
MP15

MP15

MPi7~
MP18

MP19

MP2O

MP21~
MP22~

MP23~

Wi

HP

Part

Number

5086-7377
5088-0377

85027-6000
P/O

Al

P/0

Al

P/0

Al

85027-00001
85027-20005

85027-20003
85027-20004

0535-0694
85027-00002

0360-0002
051

5-1445

1531-0289

051

5-0820

0515-0912

8502

7-80002
55027-80012
85027-80010
2190-0584

85027-80007

9211-0126
8502

7-80004
85027-80005

85027-60002
85027-6000

85037-60001
85025-50003
85027-9000

Table

C
D

5
3

1

2

6

2

0
3

7
6

2

4
5
5

4
6

4
5

7
5
0

4
0

9
7

8
3

3

4
4
2

1

5

6-3B.

oty

85027B

BRIDGE
BRIDGE

CIRCUIT
TERMINATION

INPUT
TEST

DRESS COVER
CABLE COVER

EXTRUDED
PORT

NUTM-DBLHX
WRENCH,

TERMINAL-SLDR

SCREW-THD-RLGM3X
MACHINEDPART-SST

SCREW-MACH M2X0.4
SCREW-MACH

ID
FOAM
INSTRUMENT
LOCK
LABELID85027B

CARTON-CORRRSC

LABELINRFINTEST
LABEL WARNING

NOT
ADAPTER

ADAPTERM3,5F3.5

3.5MM

CABLE
OPERATING

HP

REPLACEABLE

MICROCIRCUIT
MICROCIRCUIT

BOARD

CONNECTOR

PORT

CONNECTOR

HOUSING

COVER

CONNECTOR-SAVER

LABEL 85027B

PAD

WASHER

ASSIGNED

M 3.5M3.5

OPEN/SHORT

ASSY

AND

85027B

Description

PARTS

ASSEMBLY
ASSEMBLY

ASSEMBLY

CARTRIDGE

LUG

PL-MTG

0.5

SPACER-BRIDGE

5MM-LG 90-DEG-FLH-HD

3.0X8MM

CASE

PN PD

M3.0

ll.5-IN-LG

MAXIMUM

ASSEMBLY

SERVICE

Replaceable

(NEW)
(REBUILT)

FOR-#2-SCR

8MM-LG

8.625-IN-WD

INPUT

MANUAL

Parts

Mir

Code

28480
28480

28480
28480

28480
28480

28480
28480

28480
28480

28480
28480

28480
28480

28480
28480
28480

28480

28480
28480
28480
28480

28480
28480
28480

28480
28480

28480
28480
26480

5086-7377

5086-6

377

85027-60001

P/D

Al

P/O

Al

PlO

Al

85027-00001

85027-20005
85027-20003

8502

7-20004

0535-0694
85027-00002

0360-0002
0515-1445

1531-0289
0515-0820
0515-0912

85027-80002
85027-80012
85027-80010
2190-0584
8502

7-80007

9211-0126
85027-80004
85027-80005

85027-60002

85027-60003

85037-60001
85025-60003
85027-90001

Mfr

Part

Number

NOT SHOWN

~~SEE

TABLE

6-4

6-6

HP

85027A/B/C

Replaceable

Pai-ts

Al

MP9

(NOT

()

VISIBLE)

M18

(NOT

VISIBLE)

BACK SIDE

—.---------_

(FOUR

TIMES)

MP1

(NOT

VISIBLE,ONSIDE)

-~

9

J2

M4

A2

MP8
(NOT

(FOUR

TIMES)

VISIBLE)

Only
any
Section8of

nectors can

the

parts

disassemblyorrepair

this

be

Figure 6-lB.

CAUTION

listed

are replaceable. Any

procedure

mnanual

will

void

not

the

repairedorreplaced only

HP

85027B

Replaceable

6-7

attempt

specifically

warranty.

by

Hewlett-Packard.

Parts

Identification

to

perform

outlined

Damaged

in

con

-

HP

85027A/B/C

Replaceable

Parts

Reference

Designation

Al
Al
A2”

AT1
.11

J2

MP1

MP2
MP3
MP4

MP5

MP6

MP7
MP8
MP9

MP1O
MP1

1

MP1

2
MP13
MPl4~

MPl5~
MP16

MP17
MP18

MP19
MP2O

MP2l~
MP22~
MP23~

Wl

HP

Part

Number

5086-7399
5086-6399
85027-60001

P/O

Al

P/O

Al

P/O

Al
85027-00001
85027-20005
85027-20003
85027-20004

0535-0694

0515-1417
1531-0289

0515-0820
0515-0912
85027-80003
1400-0249
9211-4429

85027-80012

85027-80008
85027-80011

8502

7-80004

85027-80005
2190-0584

1250-1475

1

1512A

85032-60001

85025-60003
85027-90001

Table

C
D

9
2

6
2
0

3

8

4

5
5

4

6

4
6
0
3

7
6

7
8

0

4
0

9
2

5

6-3C.

Qt~/

650270

BRIDGE
BRIDGE
CIRCUIT
TERMINATION
INPUT

TEST
DRESS
CABLE
EXTRUDED
PORT

NUTM-DBLHX
NOT

ASSIGNED

NOT

ASSIGNED
SCREW-THD-RLG M3X0.5
MACHINED PART-SST

SCREW-MACH M2X0.4
SCREW-MACH 3.0X8MM

ID

LABEL
CABLE
CASE-ACCESS

FOAM PAD
LABELID85027C

INSTRUMENT

LABELINRFINTEST
LABEL WARNING

LOCKWASHERM3.0

ADAPTER-COAX

SHORT”N’
OPEN
CABLE

OPERATING

NOT SHOWN

~~SEE

HP

85027C Replaceable

Description

REPLACEABLE

MICROCIRCUIT
MICROCIRCUIT

BOARD

CONNECTOR

PORT

CONNECTOR
COVER
COVER

HOUSING

COVER

85027C

TIE

.062-.625-DIA .091-WD NYL

MALE

CKT

ASSYMN

ASSEMBLY

TABLE

ASSEMBLY

CARTRIDGE

BIRCH

CASE

MAXIMUM

STIR

AND

SERVICE

6-4

PARTS

ASSEMBLY
ASSEMBLY (REBUILT)

SPACER-BRIDGE

5MM-LG

9.71IN-LG 6.76IN-WD

M-PRCNNM-PRCN

1OMM-LG

PN PD

INPUT

MANUAL

(NEW)

90-DEG-FLH-HD

N

Paris

Mfr

Code

28480
26480
28480

28480
28480

28480
28480
28480
28480
28480

28480

28480
28480

28480
28480
28480
06383

28460
28480

28480
28480
28480
28480

26480
28460
28480
28480

28480
28480

5086-7

399
5086-6399
85027-60001

P/O

Al

P/O

Al

P/O

Al

85027-00001
85027-20005
8502

7-20003

85027-20004
0535-0694

051

5-1417

1531

-0289

0515-0820
0515-0912

85027-80003
PLT1M-8

9211-4429
65027-80012

85027-80008
85027-80011
85027-80004
85027-80005

21

90-0564
1250-1475
1

l5l2A

85032-60001
85025-60003

85027-90001

Mfr

Part

Number

S.t

~

t~I

~

6-8

Ml8

(NOT

VISIBLE)

BACK SIDE

HP

85027A/B/C

Replaceable

Parts

Al

MP9

(NOT

MP1O

VISIBLE)

(NOT

VISIBLE)

M4

(NOT

VISIBLE)

Only

the

parts

listed are replaceable. Any

any disassemblyorrepair

Section8of

nectors can

this

manual

be

repairedorreplaced

M19,ONSIDE

CAUTION

procedure

will

void

attempt

not

specifically

the

warranty. Damaged

only

by

Hewlett-Packard.

to

perform

outlined

in

con

-

M8
(FOUR
(NOT

VISIBLE)

TIMES)

Figure 6-iC.

HP

85027CReplaceable

6-9

Parts

Identification

HP

85027A/B/C

Replaceable

Parts

Reference

Designation

A2

A2C

1

A2C2
A2C3

A2C4
A2C5
A2C6
A2C7

A2C8
A2C9

A2C1

0

A2C1

I

A2C12

A2CR1
A2CR2

A2CR3
A2MP1
A2R

1

A2R2
A2R3
A2R4
A2R5

A2RE
A2R7

A2RB
A2F1S
A2R1

0

A2R1

1

A2R12

A2P14

A2R15

A2R16
A2R17

A2R18
A2R1

9

A2R21
A2R22
A2R23

A2024
A2R25
A2R28
A2R29

A2R30

A2RT1
A2S

1

A2U

1

A2U2
A2U3

A2U4
A2U5
A2U6

A2VR1

A2VR2

HP

Part

NumberC0

85027-60001
0160-5375
0160-5375

0160-5375
0160-5375
0180-2683
0160-5375
0160-5375

0160-5375
0160-5375

0180-2661
0180-2661
0160-0573

1901-0050
190

1-0050
1901-0539
85027-20001
0698-72

12

0698-

7279

0698-

724

9

0698-

7294
2100-3091
0698-7212

0698-

7212
0698-7212
0698-8615
2100-3097

0698-72

12

0688-72

12
0698-7268
0698-7236
0698-

725

3

0698-7212
0698-7229

0698-

724

7

0698-

726

1
0698-7253
0698-7251

0698-7251
2100-3091

0698-

7224

2100-3266
0698-

7277

083

7-0324
3101-2851
1

NB7-8045

1

NB7-8039

1826-04

12

1826-0772
1826-0285

1826-0932
1902-3246
1902-3245

Table

0tY

2

8

2
2

2
2

2
2

2

2

5
5
2

2

3
3
3
8

9

7

8
2

2

9
9

9
8

9
9

9

2

8
9

8
0

8
B

2

6
6

3
6

6
6

2
6

8

6
6

0

2

6
6

6-4. A2Bridge

Circuit

Description

A2

BRIDGE

CIRCUIT

BOARD

ASSEMBLY

BRIDGEPCBOARD
CAPACITOR-FXD
CAPACITOR-FXO

CAPACITOR-FXD
CAPACITOR-FXD
CAPACITOR-FXD
CAPACITOR-FXD
CAPACITOR-FXD

CAPACITOR-FXD
CAPACITOR-FXD

CAPACITOR-FXD
CAPACITOR-FXD
CAPACITOR-FXD

DIODE-SWITCHING
DIODE-SWITCHING
DIODE-SM
BD-AC/DC
RESISTOR

RESISTOR 61.9K
RESISTOR 3.48K
RESISTOR
RESISTOR-TRMR2K10%CTOP-ADJ17-TRN
RESISTOR

RESISTOR
RESISTOR
RESISTOR
RESISTOR-TRMR

RESISTOR

RESISTOR
RESISTOR

RESISTOR
RESISTOR

RESISTOR
RESISTOR

RESISTOR
RESISTOR

RESISTOR
RESISTOR

RESISTOR
RESISTOR-TRMR2Kl0°/~CTOP-ADJ

RESISTOR
RESISTOR-TRMR
RESISTOR

THERMISTOR
SWITCH
PREAMP

CLOCK HYBRID
IC

COMPARATOR

ICVRGLTR-ADJ-POS
ICVRGLTR

ICOPAMP
DIODE-ZNR21.5V
DIODE-ZNR21.5V

ASSEMBLY

.1UF

*-l0°/o

.1UF

.1UF
.1UF

4.7UF-s-20°/o
.1UF
.1UF

.1UF
.IUF

lUF~-10%
1UF+-10%

4700PF

SIG

SCHOTTKY
BRIDGE
100

l0/o

I0/o
l0/o

lOOK

1°/o
1001%.05WFTCO*-100
100

lOb

1001%.05WFTCO+-lOO
75K

iSo

100K

1001%.05W

100

l°/o

147K1%.05WFTCO*-100

1K

10/s

.05WFTCO÷-100

5.11K

lOb

100

10/o

511l%.05WFTC—0+-l00

2.97K

10/s

11K

l°/o

5.11K

l°/o

4.22K 1%

4.22K 1°/s
316

1°/o

10K

51.1K

l°/~

DISC

HYBRID

ASSEMBLY

ASSEMBLY

PRCN

TO-92

PRCN

8-DIP-C

5°/o
5°/o

50V0C

*-lO%

5OVDC

*-lO%

50VDC

+-l0%

5OVDC

35VDC

o--l0°/o

5OVDC

+-l0°/o

5OVDC

c~1E%

5OVDC

*-10%

5OVDC

5OVDC
5OVDC

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2K-OHM

TC--4.4%/C-DEG

DUAL

8-DIP-P

l.2/32V

TO-92

PKG

00-35

P0-4W

00-35

PD-.4W

Board

CER
CER

CER
CER

TA
CER
CER

CER
COP

TA
TA

00-35

17-TON

17-TRN

PKG

PKG

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A ssembli’

Mfr

Code

28480
28480

28480
28480

28480
28480

29480
28480

28480
28480
25088
25088

28480

28480
28480
28480
28480

24546
24546

24546
24546
32997
24546

24546

24546

28480
32997
24546

24546
24546

24546
24546

24546
24546

24546
24546
24546

24546
24546

32997

24546

32997

24546
28480

28480
28480
28480
27014

28480
04713

06665
28480
28480

Mfr

85027-60001
0160-5375

0160-5375
0160-5375

0160-5375
0180-2663
0160-5375
0160-5375

0160-5375
0160-5375
Dl

ROGS1

A5OK

Dl

ROGS1

A5OK

0160-0573
1901-0050

1901-0050
1901-0539
85027-2000

C3-1/8-TO-100R-F
C3-1/8-T0-6

C3-1/8-T0-3481-F
C3-l/8-T0-1

3292W-1-202

C3-l/6-TO-100R-F
C3-l/8-TO_

C3-1/B-TO-100R-F

0698-86
3292W-1-104

C3-1/8-TO-100R-F
C3-l/8-TO-100R-F

03-1/8-TO­03-1 /8-TO-

C3-1/8_T0-5111F
C3-l/8_TO-100R_F

C3-1
C3-l/6­C3-1/8_T0-l
C3-1/8-TO-51

C3-1/8-T0-4221-F
C3-1

3292W-l
C3-1/8-TO-316RF

3292W-1-l03
C3-1/8-TO-5l

083
3101-2851
1
1
LM393N

1826-0772
MC79LO5C
OP-27FZ
1902-3245
1902-3245

15

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HP

85027A/B/C Manual

BackdatingChanges

INTRODUCTION

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7-1

HP 85027A/B/C

Service

INTRODUCTION

You

will

findinthis
HP
the

85027.

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refer

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SERVICE

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inspection,

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85027A/B/C

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85027A/B/C

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1.

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1.

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85027

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85027A/B/C

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8-4.

SMA

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8-10

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HP

85027A/B/C

Service

SCALE

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HP

85027A/B/C

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8-6.

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HP

85027A/B/C

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HP

85027A/B/C

Service

Gaging

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Figure

8-8.

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Figure

8-9.

Zeroing

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the APC-7

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HP

85027A/B/C

Service

ALLOWABLE

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Figure

8-10.

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8-17

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Connectors

INCH)

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HP

85027A/B/C

Service

REMOVING

OLD

COLLET.

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FORCEPS

/

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INTO PLACE.

TO

BLUNT
PLASTIC
ROD

\

Figure

8-11.

Collet

Removal

and

Replacement,

8-18

APC-7Connectors