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HP

54501A

100

MHZ

DIGITIZING

OSCILLOSCOPE

CPS

HEWLETT

PACKARD

SERVICE

MANUAL

SERIAL

NUMBERS

This

manual

applies

directly

to

instruments

with

serial

numbers

prefixed

:

2816A,

2833A,

2842A,

2906A

and

2913A

.

For

additional

information

about

serial

numbers,

see

INSTRUMENTS

COVERED

BY

MANUAL

in

Section

1

.

©

COPYRIGHT



HEWLETT-PACKARD

COMPANY/COLORADO

SPRINGS

DIVISION 1988

1900

GARDEN

OFTHE

GODS

ROAD,

COLORADO

SPRINGS,

COLORADO

U

.S

.A

.

ALL

RIGHTS

RESERVED

Manual

Part

Number

54501-90906

Microfiche

Part

Number

54501-90806



PRINTED

:

28

FEBRUARY

1989

CERTIFICATION

Hewlett-Packard

Company

certifies that

this

product

met

its

published

specifications

at

the

time of

shipment

from

the

factory

.

Hewlett-Packard

further

certifies that

its

calibration

measurements

are

traceable

to

the

United

States National

Bureau

of

Standards,

to

the

extent

allowed

by

the

Bureau's

calibration

facility,

and

to

the

calibration

facilities

of

other

International

Standards

Organization

members

.

WARRANTY

This

Hewlett-Packard

product

is

warranted

against defects

in

material

and

workmanship

for

a

period

of

one

year

from

date

of

shipment

.

During

the

warranty

period,

Hewlett-Packard

Company

will,

at

its

option,

either repair

or

replace

products

which

prove

to

be

defective

.

For

warranty

service

or

repair, this

product

must

be

returned

to

a

service

facility

designated

by

HP

.

Buyer

shall

prepay

shipping

charges

to

HP

and

HP

shall

pay

shipping

charges

to return

the

product

to

Buyer

.

However,

Buyer

shall

pay

all

shipping

charges,

duties,

and

taxes

for

products

returned

to

HP

from

another

country

.

HP

warrants

that

its

software

and

firmware

designated

by

HP

for

use

with

an

instrument

will

execute

its

programming

instructions

when

properly

installed

on

that

instrument

.

HP

does

not

warrant

that

the

operation

of

the

instrument

or

software,

or

firmware

will

be

uninterrupted

or

error

free

.

LIMITATION

OF

WARRANTY

The

foregoing

warranty

shall

not

apply

to

defects

resulting

from

improper

or

inadequate

maintenance

by Buyer, buyer-supplied

software

or

interfacing,

unauthorized

modification

or

misuse,

operation outside

the

environmental

specifications

for

the

product,

or

improper

site

preparation

or

maintenance

.

NO

OTHER

WARRANTY

IS

EXPRESSED

OR

IMPLIED

.

HP

SPECIFICALLY

DISCLAIMS

THE

IMPLIED

WARRANTIES

OF

MERCHANTABILITY

AND

FITNESS

FOR

A

PARTICULAR

PURPOSE

.

EXCLUSIVE

REMEDIES

THE

REMEDIES

PROVIDED

HEREIN

ARE

BUYER'S

SOLE

AND

EXCLUSIVE

REMEDIES

.

HP

SHALL

NOT

BE

LIABLE

FOR ANY

DIRECT,

INDIRECT,

SPECIAL,

INCIDENTAL,

OR

CONSEQUENTIAL

DAMAGES,

WHETHER

BASED

ON

CONTRACT,

TORT,

OR

ANY

OTHER

LEGAL

THEORY

.

ASSISTANCE

Product

maintenance

agreements

and

other

customer

assistance

agreements

are

available

for

Hewlett-Packard

products

.

For

any

assistance,

contact

your

nearest

Hewlett-Packard

Sales

and

Service

Office

.

Addresses

are

provided

at

the

back

of

this

manual

.

CWA584

HP

54501

A

TABLE

OF

CONTENTS

SECTION

1

.

GENERAL

INFORMATION

1-1

.



Introduction

. . . .

.

.

. .

.

.

...

.

.

.

. .

.

. .

.

. .

.

. . . .

.

.

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.

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.

.

.

. .

.

. . . .

.

. .

.

.

.

. .

1-1

1-2

.



Instruments

Covered

by

Manual

. .

.

. . . .

.

.

. .

.

.

. .

.

.

.

. .

.

. . . .

.

. .

.

.

.

.



1-1

1-3

.



Instrument

Description

.. ... ... ..

.

. .

.

. . . .

.

.

. .

.

.

. .

.

.

. .

.

.

.

.

. .

.

. . . .

.

.



1-1

1-4

.



Accessories

Supplied

.

. .

.

. . . .

.

. .

.

. .

.

. . . .

.

.

. .

. . . .

.

.

.

. .

.

. . . .

. .

.

.

. . .



1-1

1-5

.



Accessories

Available

.

. .

.

.. ... ..

.

. .

.

. . . .

.

. .

.

. . . .

.

.

.

. .

.

. . . .

.

. .

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.

.

.



1-2

1-6

.



Specifications

. .

.

. .

.

. .

.

. .

.

.. ... ..

.

. .

.

. . . .

.

.

. .

. . . .

.

.

.

. .

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.

. .

.

. .

.

. . .



1-2

1-7

.



Operating

Characteristics

. .

.

. . . .

. .

.

.

. . . .

.

.

. .

. .

.

.

.

.

. .

.

.

. . . .

. .

.

.

.

.

.



1-2

1-8

.



General

Characteristics

.

.

. .

.

. .

.

.

. .

.

.

. . . .

.

. .

.

. .

.

.

.

.

. .

.

.

.

.

. .

. .

.

.

. . . .

1-2

1-9

.



Recommended

Test

Equipment

.

. .

.

. .

.

.

.

.

. .

.

.

. .

.

.

. .

.

.

. .

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. .

.

.

. . . .

1-9

SECTION

2

.

INSTALLATION

2-1

.



Introduction

.

.

. . . .

.

. .

. .

.

.

. .

.

. .

.

.

. .

.

.

. .

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.

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. . . .

.

.

. .

.

.

. . . .

. .

.

.

. . . .

2-1

2-2

.



Initial

Inspection

.. . . .

. .

.

.

. .

.

. .

.

.

. .

.

.

. .

.

.

.

. .

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.

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.

.

. .

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.

. .

.

.

. .

.

.

. . . .



2-1

2-3

.



Operating

Environment

.

. .

.

. .

.

.

. .

.

.

. .

.

.

.

.

. .

. .

.

.

.

.

. .

.

.

. .

.

.

. .

.

.

.

. .

.

2-1

2-4

.



Storage

and

Shipping

.

.

.

. .

.

. .

.

.

. .

.

.

. .

.

.

.

. .

.

. .

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.

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. .

.

. .

.

.

.

. .

.

.

. . . .

2-1

2-5

.



Packaging

. . .

.

. .

.

.. ...

.

.

. .

.

.

. .

.

. .

.

.

.

. .

.

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.

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.

. .

.

.

. .

.

.

. .

.

.

. . . .

2-1

2-6

.



Tagging

for

Service

.

.

.

. .

.

.

... ..

.

.

.

. .

.

.

.

. .

.

. .

.

.

.

.

. .

.

.

. .

.

.

. .

.

.

. .

.

.

2-1

2-7

.



Original

Packaging

.

.

.

. .

.

.

. .

.

. .

.

.

. .

.

.

.

.

. .

.

. .

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.

. .

.

.

2-1

2-8

.



Other

Packaging

.

.

. .

.

.

. .

.

.

... ..

.

.

. .

.

.

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. .

.

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.

. .

.

. .

.

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.

. .

.

.

. .

.

.

2-1

2-9

.



Preparation

for

Use

. .

.

. .

.

.

. .

.

.

. .

.

.

.

. .

.

.

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. .

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.

.

. .

.

.

. .

.

.

.

. .

.

.

2-2

2-10

.



Power

Requirements

.

. .

.

. .

.

.

. .

.

. .

.

.

.

.

.

. .

.

. .

.

. .

. . .

.

. .

.

.

. .

.

.

.

. .

.

.

2-2

2-11

.



Line

Voltage

Selection

.

.

. .

.

.

. .

.

.

. .

.

.

. . . .

. .

.

.

.

.

.

. .

.

. .

.

.

.

. .

.

.

. .

.

.

2-2

2-12

.



Power

Cable

. .

.

.

... ..

.

.

. .

.

. .

. . . .

.

.

. .

.

.

.

.

. .

.

. .

.

. . . .

.

.

. .

.

.

. .

.

.

.

. .

.

.

2-2

2-13

.



Applying

Power

.

... ..

.

.

. .

.

. .

. . . .

.

.

. .

.

.

.

.

. .

.

. .

.

.

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. .

.

.

. .

.

.

. .

.

.

.

. . . .



2-2

2-14

.



Cleaning

Requirements

.

.

. .

.

.

. .

.

.

. .

.

.

.

.

. .

. .

.

.

.

.

. .

.

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. .

.

.

.

. .

.

. .

.

.

.

2-2

SECTION

3

.

PERFORMANCE

TESTS

3-1

.



Introduction

.

. .

.

.

.

... ..

.

. .

.

.

. .

.

.

. .

.

.

. .

.

.

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. .

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. .

.

.

.

.

. .

.

.

. .

.

.

..

.

.

. . . .

3-1

3-2

.



Equipment

Required

. .

.

. .

.

.

. .

. . . .

.

. . . .

.

.

.

. .

.

. .

.

.

.

. .

.

.

.

. .

.

.

. .

.

.

. . . .

3-1

3-3

.



Test

Record

.

. .

.

.

.

... ..

.

. .

.

.

. .

. . . .

.

.

. .

.

.

. . . .

.

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.

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.

. .

.

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.

. .

.

.

. .

.

.

. . .



3-1

3-4

.

Selftest Verification

. . .

.

. .

.

.

. .

. . . .

.

.

.

. .

.

.

.

. .

.

. .

.

.

.

.

. .

.

.

. .

.

. .

.

.

.

. . .

3-1

3-5

.



Bandwidth

Performance

Test

.

.

. .

.

. .

.

.

.

. . . .

. .

.

.

.

.

. .

.

.

.

. .

.

. .

.

.

.

. . .



3-2

3-6



Offset

Accuracy

Test

. .

.

. .

.

.

. .

. . . .

.

. .

.

.

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.

.

. . . .

3-3

3-7

.



Trigger

Sensitivity

Test

.

. .

.

.

. .

. . . .

.

. .

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. .

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. .

.

.

3-5

3-8

.



Delta-t

Accuracy

Test

.

.

. .

.

.

. .

. . . .

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. .

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.

. .

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. .

.

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. .

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.

.

. . . .

3-8

3-9

.



Voltage

Measurement

Accuracy

.

.

. .

.

.

.

.

.

. .

.

. .

.

.

.

. .

.

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. . . .

3-9

SECTION

4

.

ADJUSTMENTS

TABLE

OF

CONTENTS

4-1

.



Introduction

. .

.

.

. .

. .

.

. . . .

.

. .

.

. .

.

.

.

. .

.

.

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. .

.

.

. .

.

.

. .

.

.

.

. .

.

.

4-1

4-2

.



Equipment

Required

. . . .

.

. .

.

. . . .

.

. .

.

.

.

. . . .

. .

.

.

. . . .

.

.

. .

. .

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.

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.

. .

.

.

.

4-1

4-3

.



Calibration

Interval

.

.

. .

.

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.

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. .

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.

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.

.

. .

.

.

.

4-1

4-4

.



HP

54501A

Self

Calibration

.

. . .



.

.

.

.

. .

.

.

. .

.

.

. . . .

.

. .

.

. . . .

.

.

. .

.

.

.

4-1

4-5

.



Power

Supply

Adjustment

.

.

. . . .

.

. .

.

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. .

.

.

. .

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. . . .

.

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. .

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.

.



4-2

4-6

.



CRT

Monitor

Assembly

Adjustments

.

. . . .

. .

.

.

. .

.

.

.

. .

.

. .

.

.

.

. .

.

.

.

.

4-3

4-6

.



CRT

Monitor

Assembly

Adjustments

. .

.

.

.

.

.

. .

.

.

.

.

. .

.

.

.

. .

.

.

.

.

.

. .

.

4-3

4-7

.



Intensity,

Sub-bright,

and

Contrast

Adjustments

. .

.

.

. .

.

.

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. .

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. .

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. . . .

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. .

4-3

4-8

.



Focus

Adjustment

. . . . . .

. .

.

.

. . . .

.

.

. .

.

.

..

.

. . .

.

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. .

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.

.

4-5

4-9

.



Horizontal

Phase,

Vertical

Linearity,

and

Height

Adjustments

. .

.

.

.

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. .

.

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.

.

.

.

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. . .

.

4-5

4-10

.



System

Board

Assembly

Adjustments

.. . . . . .

.

. .

.

. . . .

.

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.

.

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. . . .

.

.

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.. ..

.

.

. .

. . .

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.

.

4-6

4-11

.



Extender

Cable

Installation

. . . .

.

.

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. .

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.

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.

.

.

.

.

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.

. . . .

.

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.

. .

.

4-6

4-12

.



Default

Calibration

Load

. .

.

.

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. .

4-6

4-13

.



DAC

Reference

Adjustment

.

.

.

. .

.

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.

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.

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.

.

4-7

4-14

.



Track

and

Hold

Offset

Adjustments

.

.

. .

.

.

. .

.

.

.

.

.

. .

.

.

.

.

. .

.

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.

.

.

.

4-8

4-15

.



Attenuator

Compensation

Ajustments

. .

.

.

. .

.

.

.

.

.

.

. .

.

.

.

.

. .

.

.

.

.

.

4-9

4-16

.



Pulse

Response

. .

.

.

. .

.

. .

.

.

. .

.

.

.

..

.

.

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. .

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.

. .

.

.

.

.

.

. . . .

.

4-11

4-17

.



Self

Calibration

.

.

. .

.

. .

.

.

..

.

.

. .

.

.

. .

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.

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.

. . .

. .

.

.

. . .

. .

4-11

4-18

.



Logic

Trigger

Delay

Calibration

. .

.

.

.

.

.

. . . .

.

.

. .

.

.

.

.

.

.

.

. .

.

.

. . . .

.

4-13

4-19

.



Oscillator

Output

Check

.

. .

.

.

. .

.

.

.

.

. .

.

.

.

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.

.

. .

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. .

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.

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.

. .

.

.

. . . .

.

4-14

SECTION

5

.

REPLACEABLE

PARTS

HP

54501A

TABLE

OF

CONTENTS

SECTION

6

.

SERVICE

6-1

.



Introduction

.

.

.

. .

.

.

..

.

..

.

.

.

. .

.

.

.

. .

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.

. .

.

.

.

.

. . . .

.

.

.

.

6-1

6-2

.



Safety

Considerations

..

.

.

.

. .

.

.

.

.

. .

.

.

. .

.

.

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.

. .

.

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.

. .

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.

.

.

.

. .



6-1

6-3

.



Logic

Convention

.

. .

.

. .

.

.

.

. .

.

.

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.

. .

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. .

. . .

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. .

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.

.

.

.

6-1

6-4

.



Block

Level

Theory

of

Operation

. .

.

.

.

. .

. .

.

.

. . . .

.

.

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. . . .

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. . . .

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. .

.

.

.

.

6-2

6-5

.



Power

Supply

Assembly

.

.

.

. .

.

.

. .

. .

. .

.

.

. .

.

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.

. . .

. .

.

.

. . .

. .

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.

. .

.

.

.

.

6-2

6-6

.



Display

Monitor

Assembly

.

. .

.

.

.

. . . .

.

.

.

.

. .

.

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.

.

. .

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. .

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. .

.

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.

.

6-2

6-7

.



System

Board

Assembly

.

.

.

. .

.

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.

. .

.

.

.

.

. .

.

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.

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. .

.

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. .

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. .

.

.

.

.

6-2

6-8

.



Keyboard

Assembly

. .

.. . .

.

.

. .

.

.

. . .

. .

.

.

.

. .

.

.

.

.

.

.

. .

.

.

.

.

..

.

.

.

.

. . . .

6-2

6-9

.



System

Board

Assembly

Theory

of

Operation

.

.

. .

.

.

. .

.

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.

. .

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.

. .

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. . .

. .

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. .

.

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. .

6-4

6-10

.



Data

Acquisition

. .

.

.

. .

.

.

.

. .

.

.

.

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. .

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. . . .

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.

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.

. .

.

.

.

.

6-4

6-11

.



System

Control

.

.

. .

.

.

. . . .

. .

.

.

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.

. .

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. .

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.

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. .

.

.

.

.

6-7

6-12

.



Troubleshooting

.

.

. .

.

.

. . . .

.

. .

.

.

.

.

. .

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. .

.

.

.

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. .

.

.

.

.

6-9

6-13

.



Troubleshooting

Flowcharts

.

.

.

. .

.

.

.

.

.

.

. . . .

. .

.

.

.

.

.

. .

.

.

.

.

.

. .

.

.

.

.

6-9

6-14

.



Power

Supply

Voltages

Check

.

.

.

.

.

.

.

. .

.

.

.

. .

.

.

.

.

.

. .

.

.

.

.

.

. .

.

.

.

6-16

6-15

.



CRT

Monitor

Signals

Check

.

.

.

. .

.

.

.

.

.

.

. .

.

. .

.

.

.

.

.

.

. .

.

.

.

.

.

. .

.

.

.

6-17

6-16

.



Keyboard

Signals

Check

.

. .

.

.

.

.

. .

.

.

.

.

.

.

. .

.

.

. .

.

.

.

.

.

. .

.

.

.

.

.

. .

.

.

.

6-19

6-17

.



Assembly

Removal

and

installation

.

. .

.

.

. .

.

.

.

. .

.

. . . .

.

.

.

..

.

.

.

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. . . .

. .

.

.

.

.

.

. .

.

.

.

.

.

..

.

.

.

6-21

6-18

.



Removal

and

Replacement

of

Rear

Panel

Assembly

.

. .

. . . .

.

.

.

. . . .

.

.

.

.

.

. .

.

. . . .

.

.

.

. .

.

.

.

.

. .

. . .

6-22

6-19

.



Removal

and

Replacement

of

Power

Supply

Assembly

.

.

.

.

. .

.

.

.

.

. .

.

.

.

.

. .

.

. . . .

.

.

.

. . . .

.

.

.

. .

.

.

6-22

5-1

.

Introduction

.. ... ..

. .

.

.

. . . .

.

. .

.

. . . .

.

.

. .

.

.

.

.

.

.

. . . .

.

.

.

. .

.

.

.

. . . .

.

.

.

.

.

5-1

5-2

.

Abbreviations

. . .

.

. .

.

. .

.

. .

.

.

.

..

.

. . . .

.

.

.

. . .

. .

.

.

. . . .

.

.

.

.

. .

.

.

.

.

. .

.

.

.

.

.

5-1

5-3

.

Replaceable

Parts

.

.

. .

.

. . . .

.

. .

.

.

.

. .

.

.

.

.

.

.

. .

.

.

.

.

. .

.

.

.

.

. .

.

.

.

.

.

. .

.

.

.

.

5-1

5-4

.

Exchange

Assemblies

.

.

.

. .

.

.

. .

.

.

. .

.

.

.

.

.

.

.

..

.

.

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.

. .

.

.

.

. .

.

.

.

.

.

. .

.

.

.

.

5-1

5-5

.

Ordering

Information

.

.

.

.

. .

.

.

. .

.

.

.

. .

.

.

.

.

.

. .

.

.

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.

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. .

.

.

.

. .

.

.

.

.

.

. .

.

.

.

.

5-1

5-6

.

Direct Mail

Order

System

. .

.

.

. .

.

.

. .

.

.

.

.

.

.

.

.

. .

.

.

. .

.

.

.

.

. .

.

.

.

.

. . .

. .

.

5-1

HP

54501A

TABLE

OFCONTENTS

6-20

.



Removal

and

Replacement

of

Keyboard

Assembly

.

.

. .

.. ... ..

.

. .

.

. . . .

.

. .

.

.

.

. . . .

. .

.

.

.

.

.

. .

.

.

.

6-23

6-21

.



Removal

and

Replacement

of

System

Board

Assembly

.

.

. . . .

.

.

. .

.

.

. .

.

.

. .

. . . . . .

.

. . . .

.

.

. .

.

.

.

6-24

6-22

.



Removal

and

Replacement

CRT

Monitor

Assembly

. .

.

. .

.

. .

.

.

. .

.

.

. .

.

.

. .

. . .

.

. .

.

. . . .

.

.

. .

.

.

.

6-25

6-23

.



Removal

and

Replacement

of

Fan

.

. .

.

. .

.

. . . .

.

. .

. .

.

.

. .

.

... ... ..

.

.

. .

.

.

.

. .

.

.

. . . .

.

.

. .

.

.

. .

.

.

.

. .

.

.

6-26

6-24

.



Removal

and

Replacement

of

Feet/Tilt

Stand

. .

. .

.

.

. .

.

... ..

.

. .

.

.

. .

.

.

.

..

.

.

. . . .

.

.

. .

.

.

.

. .

.

.

. . . .

6-26

6-25

.



HP

54501A

Self

Tests

.

. .

.

. .

.

. .

.

. .

.

.

.

. .

.

.

. .

.

.

. . . .

.

.

. .

.

.

.

. .

.

.

. . . .

6-27

LIST

OF

TABLES

1-1

.

HP

54501A

Specifications

and

Characteristics

.

.

.

. .

.

.

.

.

. .

.

. . . .

.

.

. .

1-3

1-2

.

H

P

54501A

Operating

Characteristics

.

.

.

.

. .

. .

.

.

.

.

. .

.

.

.

.

. .

.

. . . .

.

.

. .

1-4

1-3

.

HP

54501A

General

Characteristics

.

. .

.

.

.

. .

.

. .

.

.

.

.

.

. .

.

.

.

. .

.

. . . .

.

.

.

.

1-8

1-4

.

Recommended

Test

Equipment

. .

.

.

. . . .

.

. .

.

. . . .

.

.

.

. .

.

.

.

.

. .

.

.

. .

.

.

.

.

1-9

3-1

.

Voltage

Measurement

Accuracy

Test Values

and

Results

.

.

. .

.

.

.

.

3-9

6-1

.

Power

Supply

Assembly/System

Board

Assembly

Voltages

.

. .

.

.

6-18

6-2

.

CRT

Monitor

Assembly

Cable

Pin

Assignments

.

.

.

.

.

. .

.

.

.

. .

.

.

. .

.

.

6-19

6-3

.

FB

and

HB

Truth

Table

.

.

. .

.

. .

.

. .

.

. .

.

.

.

. .

.

.

.

. .

.

.

.

. .

.

. . . .

.

.

.

. .

.

.

. .

.

.

6-20

6-4

.

HP

54501A

Keyboard

Connector

Voltages

and

Signals

.

.

. . . .

. .

.

.

6-21

LIST

OFFIGURES

2-1

.

Power

Cord

Plug

Configurations

.

.

. .

.

.

. .

.

.

.

. . . .

.

.

. .

.

.

. .

.

.

.

.

.

. .

. . . .

2-3

3-1

.

Bandwidth

Performance

Test

Setup

.

.

.

. .

.

.

.

.

.

. .

.

.

. .

.

.

. .

.

.

.

.

. .

.

. . .

.

.

3-3

3-2

.

Delta-t

Accuracy

Test

Result

.

.

.

. .

.

.

. .

.

.

. .

.

.

.

.

. .

.

.

.

. .

.

.

. .

.

.

.

.

. .

.

.

.

. .

3-7

4-1

.

HP

54501APower

Supply

Assembly

Testpoints

and

Adjustment

Locations

. .

.

.

. .

.

.

. .

.

.

. . . .

.

.

. .

.

.

.

. .

.

.

. .

.

.

.

.

. .

.

.

. .

4-2

4-2

.

HP

54501A

CRT

Test

Display

.

.

.

. .

.

.

. .

.

.

. . . .

.

.

. .

.

.

.

. .

.

.

.

.

. .

.

.

. .

.

.

.

.

4-3

4-3

.

Adjustment

Locations

of

HP

54501A

CRT

Monitor

Assembly

.

.

. . . .

. .

.

. .

.

.

. .

.

.

..

.

.

.

.

. .

.

.

.

. . . .

. .

.

.

.

.

. .

.

.

.

. .

.

.

.

4-4

4-4

.

HP

54501A

System

Board

Assembly

Component

Locator

. . . .

. .

.

. .

.

.

. .

.

.

. .

.

.

.

.

.

. .

.

.

. . . .

.

. .

.

.

.

. .

.

.

.

. .

.

.

.



4-8

5-1

.

HP

54501A

Exploded

View

.

.

. .

.

.

. .

.

.

.

. .

.

.

.

. .

.

.

. .

. . .

. .

.

.

.

.

.

. .

.

.

. .

.

. .

5-2

6-1

.

HP

54501A

Simplified

Block

Diagram

.

.

.

.

. .

.

.

. .

.

.

.

. .

.

.

. . . .

.

.

.

. .

.

.

.

6-2

6-2

.

HP

54501A

Acquisition

Block

Diagram

.

.

.

.

. .

.

.

. . . .

.

. .

.

.

.

. .

.

.

.

. .

.

.

.

6-5

6-3

.

HP

54501A

System

Control

Block

Diagram

.

.

.

.

.

. .

.

. .

.

.

.

. .

.

.

.

.

.

. .

.

6-8

6-4

.

General

Trouble

Isolation

Flowchart

for

HP

54501A

.

.

.

.

. .

.

.

.

. .

.

.

6-11

6-5

.

Trouble

Isolation

Flowchart

for

HP

54501

A

Fan/Fuse

.

.

.

.

. .

.

.

.. ..

6-12

6-6

.

Trouble

Isolation

Flowchart

for

HP

54501A

Power

Supply

.

.

.

.

.

. .

6-13

6-7

.

Trouble

Isolation

Flowchart

for

HP

54501A

CRT

Monitor

.

. .

.

.

.

.

.

6-14

6=8

.

Trouble

Isolation

Flowchart

for

HP

54501A

Keyboard

.

.

.

.

. . . .

.

.

.

6-15

6-9

.

Trouble

Isolation

Flowchart

for

HP

54501A

Calibration

Signals

. .

.

. .

. . . .

.

.

. .

.

.

. .

.

.

.

. .

.

. . . .

.

.

.

. .

.

. .

.

.

.

. . . .

.

.

.

6-16

6-10

.

H

P

54501

A

Power

Supply

Testpoints

. .

.

. .

.

. . . .

.

.

.

... ..

.

.

.

.. ..

.

.

.

6-17

6-11

.

HP

54501A

CRT

Monitor

Assembly

Cable,

W6,

Location

. . . .

.

. .

6-20

6-12

.

HP

54501A

Selftest

Menu

Selections

GENERAL

-

This

Is

a

Safety Class

I

Instrument

(provided

with

terminal

for

protective

earthing)

.

OPERATION

-

BEFORE

APPLYING

POWER

verify

that

the

power

transformer

primary

is

matched

to

the

available

line

voltage,

the

correct

fuse

is

installed,

and

Safety

Precautions

are

taken

(see

the

following

warnings)

.

In

addition,

note

the

Instrument's

external

markings

which

are

described

under

"Safety

Symbols

."

WARNING

o

Servicing



Instructions



are



for



use



by



service-trained

personnel

.

To

avoid

dangerous

electric

shock,

do

not

perform any

servicing

unless

qualified

to

do so

.

oBEFORE

SWITCHING

ON

THE

INSTRUMENT,

the

protective

earth

terminal of

the

instrument

must

be

connected

to

the

protective

conductor

of

the

(mains)

powercord

.

The

mains

plug

shall

only

be

inserted

in a

socket

outlet

provided

with

a

protective earth

contact

.

The

protective

action

must

not be

negated

by

the

use

of

an

extension

cord

(power

cable)

without

a

protective

conductor

(grounding)

.

Grounding

one

conductor

of a

two-

conductor

outlet

Is

not

sufficient

protection

.

be energized

via

an

o

If



this



instrument



Is



to

auto-transformer

(for

voltage

reduction)

make

sure

the

common

terminal

is

connected

to

the

earth

terminal

of

the

power

source

.

o

Any

interruption of

the

protective

(grounding)

conductor

(inside

or

outside

the

instrument)

or

disconnecting

the

protective earth

terminal

will

cause

a

potential

shock

hazard

that

could

result

in

personal

injury

.

o

Whenever

It

is

likely

that

the

protection

has

been

impaired,

the

instrument

must

be

made

inoperative

and be secured

against

any

unintended

operation

.

oonly

fuses

with

the

required rated

current, voltage,

and

specified

type

(normal

blow,

time

delay,

etc

.)

should be

used

.

Do

not

use

repaired

fuses

or

short

circuited

fuseholders

.

To do

so

could

cause

a

shock

or

fire

hazard

.

oDo

not

operate

the

instrument

in

the

presence

of

flammable

gasses

or

fumes

.

Operation

of

any

electrical

Instrument

in

such

an environment

constitutes

a

definite

safety

hazard

.

SAFETY

CONSIDERATIONS

o

Do

not

Install

substitute parts

or perform

any

unauthorized

modification

to

the

instrument

.

oAdjustments

described

in

the

manual

are

performed

with

power

supplied

to

the

instrument

while protective

covers

are

removed

.

Energy

available

at

many

points

may,

if

contacted,

result

in

personal

injury

.

o

Any

adjustment,

maintenance, and

repair of

the

opened

instrument

under

voltage

should

be

avoided

as

much

as

possible,

and

when

inevitable,

should be

carried

out

only

by

a

skilled

person

who

is

aware

of

the

hazard

involved

.

o

Capacitors

Inside

the

Instrument

may

still

be

charged

even

if

the

Instrument

has

been

disconnected from

its

source

of

supply

.

Instruction

manual

symbol

.

The

product

will

be

marked

with

this

symbol

when

It

is

necessary

for

the

user

to

refer

to

the

Instruction

manual

In

order

to

protect

against

damage

to

the

product

.

f

SAFETY

SYMBOLS

Indicates

hazardous

voltages

.

Earth

terminal

(sometimes

used

In

manual

to

indicate

circuit

common

connected

to

grounded

chassis)

.

The

WARNING

sign

denotes

a

hazard

.

It

calls

attention

to

a

procedure,

practice,

or

the

like,

which,

if

not

correctly

performed

or

adhered

to,

could

result

in

personal

injury

.

Do

not

proceed

beyond

a

WARNING

sign

until

the

indicated

conditions

are

fully

understood

and met

.

WARNING

The

CAUTION

sign

denotes

a

hazard

.

It

calls

attention

to

an

operating

procedure,

practice,

or

the

like,

which,

If

not

0

correctly

performed

or

adhered

to,

could

result

In

damage

to

or

destruction

of

part or

all

of

the

product

.

Do

not

proceed

beyond

a

CAUTION

sign

until

the

indicated

conditions

are

fully

understood

or

met

.

SC1D984

SECTION

1

.

GENERAL

INFORMATION

Table

of

Contents

1-1

.

Introduction

.

.

. .

.

.

.

. .

. .

.

. .

.

.

. .

.

. .

.

. .

.

.

. .

.

.

.

. .

.

.

.

.

. .

.

.

. .

.

.

.

. .

.

.

.

.

.

. .

1-1

1-2

.

Instruments

Covered

by

Manual

. .

.

.

. .

.

.

.

. .

.

.

.

.

. .

.

.

. .

.

.

.

. .

.

.

.

.

.

.

1-1

1-3

.

Instrument

Description

.

. .

.

. .

. . . .

.

. .

.

.

. .

.

.

.

. .

.

. . .

. .

.

.

. .

.

.

.

. .

.

.

.

.

. .

1-1

1-4

.

Accessories

Supplied

.

.

. .

.

. .

. . . .

.

. .

.

.

. .

.

. .

.

.

.

.

. . . .

.

.

. .

.

.

.

. .

.

.

.

.

. .

1-1

1-5

.

Accessories

Available

.

.

. .

.

. .

. .

.

.

.

. .

.

.

. .

.

.

. .

.

.

.

. . . .

.

.

. .

.

.

.

. .

.

.

.

.

. .

1-2

1-6

.

Specifications

.

.

. .

.

.

. .

.

.

..

.

. .

..

.

. . . .

.

. .

.

.

.

. .

.

.

. .

.

.

.

.

. .

.

.

.

. .

.

.

.

. . . .

1-2

1-7

.

Operating

Characteristics

.

. .

. .

.

. .

.

.

.

.

. .

.

.

. .

.

.

.

. .

.

.

.

. .

.

.

.

. .

.

.

.

.

. .

.

1-2

1-8

.

General

Characteristics

.

.

.

. .

. .

.

. .

.

.

.

. .

.

.

.

. .

.

.

.

. .

.

.

.

. .

. . .

. .

.

.

.

. .

.

.

.

1-2

1-9

.

Recommended

Test

Equipment

.

.

.

.

. .

.

.

. .

.

.

.

. .

.

.

.

.

. .

.

. .

.

.

.

.

.

. . . .

.

1-9

1-1

.

INTRODUCTION

This

service

manual

contains information

on

installing,

testing,

adjusting,

and

servicing

the

Hewlett-Packard

Model 54501

A

Digitizing

Oscilloscope

.

This

section

of the

manual

in-

cludes instrument

identification,

description,

options,

accessories,

specifications

and

other

basic

information

.

A

microfiche

part

number

is

listed

under

the

manual

part

number

on

the

title

page

of this

manual

.

This

number

may

be

used

to

order

4

X

6-inch

microfiche

transparencies

of

-the

manual

.

Each

microfiche

contains

up

to

96

photo-duplicates

of

the

manual

pages

.

The

microfiche

package

also

contains

the

latest

Manual

Changes

supplement

as

well

as

per-

tinent

Service

Notes

.

1-2

.

INSTRUMENTS

COVERED

BY

MANUAL

On

the

rear

panel

of

the

instrument

is

a

serial

number

plate

.

The

serial

number

is

in

the

form

:

OOOOA00000

.

It

is

composed

of

two

parts

;

the

first

four

digits

and

the

letter

are the

serial

prefix

and

the

last five

digits

are

the

suf-

fix

.

The

prefix

is

the

same

for

all

identical

in-

struments

and

changes

only

when

a

change

has

been

made

to

the

instrument

.

The

suffix

however,

is

assigned

sequentially

and

is

dif-

ferent

for

each

instrument

.

The

contents

of

this

manual

apply

to

instruments

with

the

serial

number

prefix(es)

listed

under

SERIAL

NUMBERS

on

the

title

page

.

An

instrument

manufactured

after

the

printing

of this

manual

may

have

a

serial

number

prefix

different

than

those

listed

on

the

title

page

.

This

unlisted

serial

number

prefix

indicates

the

instrument

is

different

from

those

described

in

this

manual

.

The

manual

for

this

instrument

is

accompanied

by

a

yellow

Manual

Changes

supplement

.

This

supplement

contains

the

necessary

"change

information"

that

explains

how

to

adapt

the

manual

to

the

newer

instrument

.

HP

54501A

GENERAL

INFORMATION

SECTION

1

GENERAL

INFORMATION

In

addition to

change

information,

the

supple-

ment

may

contain

information

for

correcting

errors

in

the

manual

.

To

keep

this

manual

as

accurateas

possible,

periodically

request

the

latest

Manual

Change

supplement

for

the

in-

strument

manual

.

The

supplement

for

this

manual

is

identified

with

the

manual

part

num-

ber

and

print

date,

both

of

which

appear

on

the

manual

title

page

.

Complimentary

copies

of

the

supplement

are

available

from

Hewlett-Packard

.

For

information

concerning

a

serial

prefix

number

not

listed

on

the

title

page

or

in

the

Manual

Changes

supplement,

contact

your

nearest

Hewlett-Packard

office

.

1-3

.

INSTRUMENT

DESCRIPTION

The

HP

54501A

Digitizing

Oscilloscope

is

a

general-purpose,

100

MHz

bandwidth

oscillo-

scope

.

The

HP

54501A

has

four

input

chan-

nels,

two

of

which

have

limited

input

attenua-

tion

.

Channels

2

and

3

are

limited to

an

at-

tenuation

factor of

10

and

optimized

for

digital

signals

.

Full

programmability

has

been

incor-

porated

into

the

HP

54501A

and

may

be

used

in

a

broadrange

of

HP-IB

applications,

from

high-speed

ATE

to

device

characterization

in

a

research

and

developement

environment

.

The

HP

54501A

Digitizing

Oscilloscope

features

powerful

triggering,

easy

waveform

storage,

automatic

measurements

and

instant

hardcopy

ouput

.

1-4

.

ACCESSORIES

SUPPLIED

The

following

accessories

are

supplied

with

the

HP

54501A

Digitizing

Oscilloscope

:

Two

HP

10432A

Miniature

Passive

Probes

.

One

miniature

probe

to

BNC

male

adapter

.

1-1

HP

54501

A

GENERAL

INFORMATION

One

2

.3

metre

(7 .5

feet)

power

cord

.

See

section

2

for

available

power

cords

.

One

Operating

and

Programming

Manual

Set

.

One

Service

Manual

.

1-5

.

ACCESSORIES

AVAILABLE

The

following

accessories

are

available

for

use

with

the

HP

54501

A

:

Soft

Carrying

Case

.

HP

Part

Number

1540-1066

.

HP

Model1008A

Option

006

Testmobile

.

Transit

Case

.

HP

Part

Number

9211-1645

.

1-6

.

OPTIONS

AVAILABLE

Option

908

-

HP

Rackmount

Kit

.

HP

Part

Number

5061-6175

.

Option

910

-

Additional

Service

Manual

and

Operating

and

Programming

Manual

Set

.

Option

090

-

Deletion

of

probe

accessories

.

1-6

.

SPECIFICATIONS

Table

1-1

is

the

list

of specifications

and

characteristics

for

the

HP

54501A

Digitizing

Oscilloscope

.

The

specifications

are the

per-

formance

standards

or

limits

for

which

the os-

cilloscope

is

tested

.

1-7

.

OPERATING

CHARACTERISTICS

Table

1-2

is

a

list

of

the

operating

characteris-

tics of

the

HP

54501A

Digitizing

Oscilloscope

.

The

operating

characteristics

are

a

summary

of

performance

capabilities

of

the

HP54501A

.

1-8

.

GENERAL

CHARACTERISTICS

Table

1-3

is

general

characteristics

of

the

HP

54501A

Digitizing

Oscilloscope

.

The

general

characteristics

are

useful

environmental

operat-

ing

conditions,

shipping

weights,

and

instru-

ment

dimensions

.

1-9

.

RECOMMENDED

TEST

EQUIPMENT

Table

1-4

is

a

list

of

the

test

equipment

required

to

test

performance,

make

adjust-

ments,

and

troubleshoot

the

HP

54501A

Digitizing

Oscilloscope

.

The

table

indicates

the

critical

specification

of

the

test

equipment

and

for

which

procedure

the

equipment

is

necessary

.

Equipment

other

than

the

recom-

mended

model

may

be

used

if it

satisfies

the

critical

specification

listed

in

table

1-4

.