Tektronix 7A18A Manual de usuario

Tektronix,

Inc.

P.O.

Box

500

Beaverton,

Oregon

97077

070-4329-00

Product

Group

Tektrone<

COMMITTED

EXCELLENCE

PLEASE

CHECK

FOR

CHANGE

INFORMATION

THE

REAR

THIS

MANUAL.

7A18A

DUAL

TRACE

AMPLIFIER

INSTRUCTION

MANUAL

Serial

Number

First

Printing

OCT

1982

Revised

NOV

1983

1971,

1982

Tektronix,

Inc.

All

rights

reserved.

Contents

this

publication

may

not

reproduced

any

form

without

the

written

permission

Tektronix,

Inc.

Products

Tektronix,

Inc.

and

its

subsidiaries

are

covered

U.S.

and

foreign

patents

and/or

pending

patents.

TEKTRONIX,

TEK,

SCOPE-MOBILE,

and

are

registered

trademarks

Tektronix,

Inc.

TELEQUIPMENT

registered

trademark

Tektronix

U.K.

Limited.

Printed

U.S.A.

Specification

and

price

change

privileges

are

reserved.

INSTRUMENT

SERIAL

NUMBERS

Each

instrument

has

serial

number

panel

insert,

tag,

stamped

the

chassis.

The

first

number

letter

designates

the

country

manufacture.

The

last

five

digits

the

serial

number

are

assigned

sequentially

and

are

unique

each

instrument.

Those

manufactured

the

United

States

have

six

unique

digits.

The

country

manufacture

identified

follows:

BO000000

Tektronix,

Inc.,

Beaverton,

Oregon,

USA

100000

Tektronix

Guernsey,

Ltd.,

Channel

Islands

200000

Tektronix

United

Kingdom,

Ltd.,

London

300000

Sony/Tektronix,

Japan

700000

Tektronix

Holland,

NV,

Heerenveen,

The

Netherlands

7A18A

TABLE

CONTENTS

Page

Section

SPECIFICATION

Introduction

.......

6...

eee

1-1

Electrical

Characteristics

..........

1-1

7A18A

and

Mainframe

Frequency

Response

........

eee

1-1

Environmental

Characteristics

......

1-2

Physical

Characteristics

..........

1-2

Section

OPERATING

INSTRUCTIONS

Installation

cixciesemieeiweswrses

2-1

Front

Panel

Controls

and

Connectors

2-1

General

Operating

Information

Basic

Applications

THE

FOLLOWING

SERVICING

INSTRUC-

TIONS

ARE

FOR

USE

QUALIFIED

PER-

SONNEL

ONLY.

AVOID

PERSONAL

INJU-

RY,

NOT

PERFORM

ANY

SERVICING

OTHER

THAN

THAT

CONTAINED

ATING

QUALIFIED

SO.

Section

CIRCUIT

DESCRIPTION

Introduction

.............

Block

Diagram

Description

Detailed

Circuit

Description

Section

PERFORMANCE

CHECK

ADJUSTMENT

Recalibration

Interval

......

Test

Equipment

Required

Part

I—Performance

Check

Part

li—Adjustment

OPER-

INSTRUCTIONS

UNLESS

YOU

ARE

Section

Page

MAINTENANCE

Preventive

Maintenance

..........

5-1

Troubleshooting

.............0055

5-1

Replacement

Parts

..............

5-3

Component

Replacement

.........

5-4

OPTION

INFORMATION

ELECTRICAL

PARTS

LIST

Abbreviations

and

Symbols

Parts

Ordering

Information

DIAGRAMS

AND

CIRCUIT

BOARD

ILLUSTRATIONS

Symbols

and

Reference

Designators

Voltage

and

Waveform

Conditions

MECHANICAL

PARTS

LIST

Mechanical

Parts

List

Information

Index

Mechanical

Parts

Illustrations

Mechanical

Parts

List

Accessories

CHANGE

INFORMATION

Abbreviations

and

symbols

used

this

manual

are

based

taken

directly

from

IEEE

Standards

260

“Standard

Symbols

for

Units”,

MIL-STD-12B

and

other

standards

the

electronics

industry.

Change

information,

any,

locat-

the

rear

this

manual.

7A18A

LIST

ILLUSTRATIONS

Fig.

No.

2-1

2.2

2-3

2-4

2-5

2-6

3-1

5-1

6-1

6-2

6-3

Front-panel

controls

and

connectors

.....

Measuring

the

peak-to-peak

voltage

WaVETOIM

©...

eee

nee

Measuring

instantaneous

voltage

with

respect

some

reference

.............

Measuring

phase

difference

betwen

two

SIQNalS.

2...

eee

High

resolution

phase

measurment

using

time-base

magnifier

...................

Using

the

ADD

mode

for

common-mode

rejection

2...

eee

Channel

Input

Amplifier

detailed

block

GIGS

cscevemismiewimseaimmimean

Channel

Input

Amplifier

detailed

block

GaGa

vices

cmiees

sms wea eee

wow

wane

U270

input

combinations

for

DISPLAY

MODE

selection

................0000.

Input/Output

combinations

for

DISPLAY

MODE

and

TRIGGER

SOURCE

switch

SOIGCHONS

sacccienimrasswacwadmem

meme

Locations

adjustments

used

this

procedure

........

eee

Electrode

configuration

for

semiconductors

used

this

instrument

................

7A18A

Option

...............

eee

Side

view

7A18A—Option

.........

Rear

view

A2-Amplifier

board

for

either

Option

standard

7A18A

...........

8-1

and

8-2 are

circuit

board

assemblies

and

are

the

diagrams

section

7A18A

OPERATORS

SAFETY

SUMMARY

The

general

safety

information

this

part

the

summa-

for

both

operating

and

servicing

personnel.

Specific

warnings

and

cautions

will

found

throughout

the

manual

where

they

apply,

but

may

not

appear

the

summary.

Terms

This

Manual

CAUTION

statements

identify

conditions

practices

that

could

result

damage

the

equipment

other

property.

WARNING

statements

identify

conditions

practices

that

could

result

personal

injury

loss

life.

Terms

Marked

Equipment

CAUTION

indicates

personal

injury

hazard

not

immedi-

ately

accessible

one

reads

the

marking,

hazard

property

including

the

equipment

itself.

DANGER

indicates

personal

injury

hazard

immediately

accessible

one

reads

the

marking.

Symbols

This

Manual

This

symbol

indicates

where

applicable

cautionary

other

information

found.

Symbols

Marked

Equipment

DANGER

High

voltage.

Protective

ground

(earth)

terminal.

ATTENTION

refer

manual.

Power

Source

This

product

intended

operate

from

power

source

that

will

not

apply

than

250

volts

rms

between

the

supply

conductors

between

either

supply

conductor

and

ground.

protective

ground

connection

way

the

grounding

conductor

the

power

cord

essential

for

safe

operation.

Grounding

the

Product

This

product

grounded

through

the

grounding

conduc-

tor

the

power

cord.

avoid

electrical

shock,

plug

the

power

cord

into

properly

wired

receptacle

before

connect-

ing

the

product

input

output

terminals.

protective

ground

connection

way

the

grounding

conductor

the

power

cord

essential

for

safe

operation.

Danger

Arising

From

Loss

Ground

Upon

loss

the

protective-ground

connection,

all

acces-

sible

conductive

parts

(including

knobs

and

controls

that

may

appear

insulating)

can

render

electric

shock.

Use

The

Proper

Power

Cord

Use

only

the

power

cord

and

connector

specified

for

your

product.

Use

only

a power

cord

that

good

condition.

Refer

cord

and

connector

changes

qualified

service

personnel.

“Use

The

Proper

Fuse

avoid

fire

hazard,

use

only

the

fuse

correct

type,

voltage

rating

and

current

rating

specified

the

parts

list

for

your

product.

Refer

fuse

replacement

qualified

service

personnel.

Not

Operate

Explosive

Atmospheres

avoid

explosion,

not

operate

this

product

explosive

atmosphere

unless

has

been

specifically

certi-

fied

for

such

operation.

7A18A

SERVICE

SAFETY

SUMMARY

FOR

QUALIFIED

SERVICE

PERSONNEL

ONLY

Refer

also

the

preceding

Operators

Safety

Summary

Not

Service

Alone

not

perform

intenal

service

adjustment

this

prod-

uct

unless

another

person

capable

rendering

first

aid

and

resuscitation

present.

Use

Care

When

Servicing

With

Power

Dangerous

voltages

exist

several

points

this

prod-

uct.

avoid

personal

injury,

not

touch

exposed

connec-

tions

and

components

while

power

on.

Disconnect

power

before

removing

protective

panels,

soldering,

replacing

components.

Power

Source

This

product

intended

operate

from

power

source

that

will

not

apply

than

250

volts

rms

between

the

supply

conductors

between

either

supply

conductor

and

ground.

protective

ground

connection

way

the

grounding

coductor

the

power

cord

essential

for

safe

operation.

7TA18A

7A18A

Dual

Trace

Amplifier

4329-01

—™\

ell

lO!

Clk

jIut

ete

CU!

CU]

Section

1—7A18A

SPECIFICATION

Introduction

switch.

Channel

can

inverted

for

differential

measure-

The

7A18A

Dual

Trace

Amplifier

plug-in

unit

designed

mens

lal

ais

alee

all

for

use

with

TEKTRONIX

7000-Series

Oscilloscopes.

ae.

The

following

electrical

characteristics

are

valid

over

the

stated

environmental

range

for

instruments

calibrated

ambient

temperature

+20°C

+30°C,

and

after

five

minute

warmup

unless

otherwise

noted.

The

7A18A

dual-channel,

medium-bandwidth

amplifi-

er.

Internal

gain

and

compensation

circuits

are

automatically

switched

correspond

the

setting

the

VOLTS/DIV

Table

1-1

ELECTRICAL

Characteristic

Performance Requirement

Supplemental

Information

Deflection

Factor

Calibrated

Range

mV/Div

V/Div;

ten

steps

1,2,5

sequence.

Deflection

Factor

Accuracy

Within

with

GAIN

adjusted

mV/Div.

Uncalibrated

(VARIABLE)

Continuously

variable

between

calibrated

steps;

extends

deflection

factor

least

12.5

V/Div.

GAIN

Permits

adjustment

deflection

factor

for

calibrated

operation

with

all

7000-series

oscilloscopes.

Frequency

Response

System

Dependent

div

reference

signal)

Upper

Bandwidth

(Direct)

MHz

Coupled

Lower

Bandwidth

(Capacitive)

Hertz

less

Coupled

With

10X

Probe

Hertz

less

Maximum

Input

Voltage

Coupled

250

volts,

(DC

Peak

AC);

component

500

volts

peak-to-peak

maximum,

one

kilohertz

less.

Coupled

500

volts,

(DC

Peak

AC);

component

500

volts

peak-to-peak

maximum,

one

kilohertz

less.

Channel

Isolation

50:1

display

ratio

megahertz.

1-1

Specification—7A18A

Table

1-1

(cont)

Characteristics

Performance

Requirements

Supplemental

Information

Input

and

Resistance

+2%.

Capacitance

Approximately

20.0

Product

Within

between

all

deflection

factors.

Displayed

Noise

(Tangentially

Measured)

0.06

div

less

all

deflection

factors

Overdrive

Recovery

Time

0.1

less

recover

to within

one

division

after

the

removal

overdrive

signal

+75

divisions

—75

divisions

regardless

overdrive

signal

duration.

Common

Mode

Rejection

Ratio

least

10:1

megahertz.

Drift

with

Time

(Ambient

temperature

and

line

voltage

constant)

0.02

division

less

any

one

minute,

after

one

hour

warmup.

Drift

with

Temperature

(line

voltage

constant)

Nor

than

0.01

division

per

degree

Time

Delay

between

Channels

700

picoseconds

less.

Display

Modes

Channel

only.

Dual-trace,

alternate

between

channels.

Added

algebraically.

Dual-trace

chopped

between

channels.

Channel

only.

Trigger

source

Selection

Channel

only.

Follows

DISPLAY

MODE

selection.

Channel

only.

Table

1-2

ENVIRONMENTAL

CHARACTERISTIC

Refer

the

Specification

for

the

associated

oscilloscope.

Table

1-3

PHYSICAL

Size

Fits

all

7000-series

plug-in

compartments.

Weight

-~2

Pounds

Ounces

(1.4

kilograms)

1-2

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