HP 54520 Series Manual de usuario

Guide

rvice

54520

and

54540

Series

Oscilloscopes

Service

Guide

Publication

Number

54542-97015

First

Edition,

April

1994

The

part

number

for

this

Service

Guide

with

binder

54542-99008

For

Safety

information,

Warranties,

and

Regulatory

information,

see

the

pages

the

back

this

book.

Hewlett-Packard

Company

1998,

1994

All

Rights

Reserved.

54520

and

54540

Series

Oscilloscopes

The

54520

and

54540

Series

Oscilloscopes

This

family

digitizing

oscilloscopes

provides

choice

channel

count

and

sample

rate.

The

54522A

and

54542A

have

two

and

four

channels

respectively

and

offer

500

MHz

repetitive

and

real-time

bandwidth

and

GSa/s

sample

rate.

The

54520A

and

54540A

also

have

two

and

four

channels

respectively

and

offer

500

MHz

repetitive

bandwidth,

but

offer

lower

maximum

sample

rate

less

real-time

bandwidth.

Features

This

family

has

variety

high-performance

features:

Two

four

signal

channels.

Two

channel

models

have

front

panel

external

trigger.

GSa/s

sample

rate

>500

MHz

repetitive

(equivalent

time)

bandwidth

Dedicated

knobs

for

vertical,

horizontal,

and

trigger

functions

Kbytes

memory

per

channel

V/div

channel

sensitivity

Selectable

50-Q

1-MQ

input

resistance

channels

and

external

trigger

Sweep

speeds

from

500

ps/div

s/div

Internal

and

external

trigger

>500

MHz

Auxiliary

trigger

>50

MHz

Autoscale

automatic

pulse

parameter

measurements

Time

tagging

sequential

single-shot

acquisitions

Easy

waveform

storage

1.44-Mbyte

disk

drive

Full

programmability

over

HP-IB

Connections

for

hardcopy

output

Service

Policy

The

service

policy

this

instrument

requires

replacing

defective

assemblies.

Some

assemblies

can

replaced

on an

exchange

basis.

Agee

|G)

EY,

Wile)

eal

t=)

ere)

545626

This

Book

This

book

provides

the

service

documentation

for

the

54520

and

54540

series

oscilloscopes.

divided

into

eight

chapters.

Chapter

provides

general

information

and

specifications.

Chapter

shows

you

how

prepare

the

oscilloscopes

for

use.

Chapter

gives

performance

tests.

Chapter

covers

calibration

and

adjustment

procedures,

how

them,

and

how

often

they

need

done.

Chapter

provides

troubleshooting

information.

Chapter

gives

the

procedures

and

techniques

for

replacing

assemblies

and

other

parts.

Chapter

includes

list

exchange

assemblies

and

other

replaceable

parts,

part

ordering

information,

and

shipping

information.

Chapter

briefly

covers

the

internal

operation

the

oscilloscopes.

the

back

the

book

you

will

find

Safety

information,

Warranties,

and

Regulatory

information.

Contents

General

Information

Instruments

Covered

This

Service

Guide

1-2

Accessories

Supplied

1-2

Accessories

Available

1-3

Options

Available

1-4

Specifications

1-4

Performance

Characteristics

1-5

Operating

Characteristics

1-7

General

Characteristics

1-16

Recommended

Test

Equipment

1-18

Preparing

for

Use

Setting

the

Oscilloscope

2-3

inspect

the

instrument

2-3

check

power

requirements

2-3

set

the

line

voltage

selection

2-4

clean

the

instrument

2-5

Operating

the

Oscilloscope

2-6

Important

features

the

front

panel

2-6

connect

signal

2-8

set

the

instrument

known

starting

condition

2-9

measure

peak-to-peak

voltage

2-9

measure

waveform

period

2-10

set

the

probe

attenuation

2-10

change

vertical

scale

2-~10

change

horizontal

scale

2-11

modify

the

edge

trigger

level

2-11

pan

and

zoom

ona

signal

2-11

use

softkey

menuitems

2-12

save

asetup

memory

2-12

recall

setup

from

memory

2-12

save

waveform

disk

2-13

load

waveform

from

disk

2-13

printhardcopy

2-14

Contents-1

Contents

Testing

Performance

Testing

Interval

3-2

Equipment

Required

3-2

Self-Test

Verification

3-2

Test

Record

3-3

Operating

Hints

3-3

Keystroke

Conventions

3-3

Specifications

3-4

Performance

Test

Procedures

3-4

test

the

Calibrator

3-4

test

input

resistance

3-5

test

voltage

measurement

accuracy

3-6

test

offset

accuracy

3-8

test

bandwidth

3-9

test

time

measurement

accuracy

3-11

test

trigger

sensitivity

3-15

test

the

oscillator

output

3~18

Calibrating

and

Adjusting

Equipment

Required

4-2

Calibration

Interval

4-2

Cal

RAM

Checksum

Error

4-2

Operating

Hints

4-2

Key-Down

Powerup

4-3

New

Software

4-3

Calibration

and

Adjustment

Procedures

4-3

Power

Supply

4-4

adjust

the

power

supply

4-4

Main

Assembly

4-5

load

the

default

calibration

4-5

adjust

the

high-frequency

pulse

response

4-6

calibrate

the

firmware

4-9

CRT

Monitor

4-11

adjust

the

display

4-11

Contents-2

Contents

Troubleshooting

Safety

5-2

Tools

Required

5-2

ESD

Precautions

5-2

Keystroke

Conventions

5-2

Default

Setup

5-3

Key-Down

Powerup

5-3

troubleshoot

the

instrument

5-3

check

power

supply

voltages

5-10

check

probe

power

outputs

5-12

check

CRT

monitor

signals

5-12

check

the

keyboard

5-13

Troubleshooting

attenuator

failures

5-13

Selftest

5-15

Self

Cal

5-16

Service

5-17

Software

Revisions

5-18

Registration

Form

5-18

Replacing

Assemblies

ESD

Precautions

6-2

Tools

Required

6-2

return

the

instrument

for

service

6-3

remove

and

replace

Cover

6-4

Rear

panel

6-4

Disk

drive

6-5

Power

supply

6-5

Keyboard

6-6

Fan

6-7

Rear

panel

cables

6-7

Main

assembly

6-8

Attenuator

6-9

Acquisition

hybrid

6-10

CRT

monitor

assembly

6-12

Contents-~3

Contents

Replaceable

Parts

Ordering

Replaceable

Parts

7-2

Listed

Parts

7-2

Unlisted

Parts

7-2

Direct

Mail

Order

System

7-2

Exchange

Assemblies

7-2

Power

Cables

and

Plug

Configurations

7-3

Exploded

Views

7-4

Replaceable

Parts

List

7-6

Theory

Operation

Block-Level

Theory

8-3

Power

Supply

Assembly

8-3

CRT

Monitor

Assembly

8-4

Main

Assembly

8-4

Front

Panel

8-4

Disk

Drive

8-4

Attenuators

8-4

Attenuator

Theory

8-7

Main

Assembly

Theory

8-7

Acquisition

System

8-7

System

Control

8-10

Contents-4

General

Information

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