Tektronix 791AD User manual

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7912AD

CALIBRATION

KIT

067-0854-00

TEKTRCNI~

( I

( l

Tektronix, Inc.

P.O. Box

500

Beaverton, Oregon

97077

First Printing MAY 1978

COMMITTEDTO EXCELLENCE

7912AD

CALIBRATION

KIT

067-0854-00

INSTRUCTION

MANUAL

Serial Number

070-2490-00

WARRANTY

All

TEl(TRONIX instrtJments are warranted against

defective materials

'cc;•··.,~orkmanship

for

one

Any

questions

with

f'i'R~!ct

to the warranty

snc>u1ci.

betaken

with

y~yrJiEl(TRONIX

Field Engineer

representative.

vy~~"

All

requests·~~fottr

·~i~~~~

...

and replacement parts

should

direC'tes

o the

TEKTRONIX

Field

Office

representative

ip.your

area. This

will

assure

you

the fastest

~si~le

•;'~~flice:

Plea~f~'rich.ide

th~~·

instrument e

Nomb~.tlbr

Part Nuriltferand

Serictl;1

Number

wit

U.;~eqo~llt{flor

parts

dP~ervice.

•

···~

$~"C.2g~

~~~~~':.:~J·;~'i7~;z.itj~~VTektronix,

Inc., Beaverton,

.•

·oreganf'Printed

in.

the United States

America.

All

rights reserved. Contents

this

publication

may

not

be reproduced in any form

without

permission

Tektronix, Inc.

U.S.A. and foreign

Tektronix

products

covered

U.S. and foreign patents

and/or

patents pending.

TEKTRONIX is a registered trademark

Tektronix,

Inc.

7912AD

CALIBRATION

KIT

TABLE

CONTENTS

SAFETY

SUMMARY

SECTION

1 -

OPERATION

Calibration

Aid

Controls

and

Connectors

Specifications

Cables

and

Connectors

Extender

Boards

SECTION

2 -

SERVICING

Circuit

Description

Cathode

Blanking

Preamp

Resolution

Check

Maintenance

Preventative

Troubleshooting

Corrective

Maintenance

Calibration

Introduction

Calibration

Procedure

SECTION

3 -

ELECTRICAL

PARTS

LIST

SECTION

4 -

DIAGRAMS

SECTION

5 -

MECHANICAL

PARTS

LIST

@ i

1-1

1-2

1-5

1-6

2-1

2-2

2-3

2-4

2-5

2-7

7912AD

CALIBRATION

KIT

SAFETY

SUMMARY

This

manual

contains

safety

information

which

the

user

must

ensure

safe

operation

this

instrument.

WARNING

information

intended

protect

the

operator.

The

following

are

general

safety

precautions

that

must

observed

during

all

phases

operation

and

maintenance.

WARNING

The

following

servicing

instructions

are

for

use

qualified

personnel

only.

avoid

personal

injury,

not

perform

any

servicing

other

than

that

contained

operating

instructions

unless

you

are

qualified

so.

Ground

the

Instrument

reduce

electrical-shock

hazard,

the

7912AD

chassis

must be

properly

grounded.

Refer

the

7912AD

Service

Manual

for

grounding

information.

Not

Operate

Explosive

Atmosphere

not

operate

this

instrument

area

where

flammable

gases

fumes

are

present.

Such

operation

could

cause

explosion.

Not

Service

Adjust

Alone

not

service

make

internal

adjustments

this

instrument

unless

another

person,

capable

giving

first

aid

and

resuscitation,

present.

Disconnect

Power

Before

Servicing

avoid

electrical

shock,

disconnect

the

instrument

from

the

power

source

before

soldering.

avoid

electrical

shock,

disconnect

the

instrument

from

the

power

source

before

replacing

components.

7912AD

CALIBRATION

KIT

2384-01

The 7912AD

Ca1ibration

Kit

iii

7912AD

CALIBRATION

KIT

SECTION

OPERATION

The

TEKTRONIX

7912AD

Calibration

Kit

provides

signals

and makes

signal

connections

for

calibration

and

repair

the

TEKTRONIX

7912AD

Programmable

Digitizer.

For

these

purposes,

the

kit

contains

calibration

signal

source,

cables,

and

extender

cards.

The

calibration

signal

source

the

same one

supplied

with

the

R7912

Calibration

Kit;

however,

new

cables

and

extenders

have

been

substituted

necessary.

Calibration

Aid

The

Calibration

Aid

calibration

signal

source

that

used

during

several

steps

the

7912AD

calibration

procedure.

Also

called

the

Video

Calibrator,

provides

special-purpose

signals

used

adjust

the

7912AD

video

preamplifier

and

processor

and

check

the

horizontal

resolution

data

acquired

the

7912AD.

Specific

operating

instruct~ons

for

the

Calibration

Aid

are

not

given

this

manual

because

these

instructions

are

part

the

7912AD

calibration

procedure.

general

operating

information

given

here,

however,

describe

the

controls

and

connectors

and

specify

performance

the

Calibration

Aid.

Controls

and

Connectors

Power

Connector:

Mates

with

the

7912AD

PROBE

POWER

outlet

power

the

Calibration

Aid.

VIDEO

CALIBRATION

Connector:

Provides

either

the

CATHODE

BLANKING

PREAMP

signal

(selected

switch).

CATHODE

BLANKING:

negative-going

pulse

used

blank

small

area

the

center

the

7912AD

scan

converter

target.

PREAMP:

standard-amplitude

signal

check

the

gain

the

7912AD

video

preamplifier.

1-1

7912AD

CALIBRATION

KIT

RESOLUTION

CHECK

Connector:

Provides

fast-rise

signal

selected

the

VERTICAL

DELAY

switch.

This

signal

used

check

the

7912AD

data

resolution.

When

the

VERTICAL

DELAY

switch

set

the

position,

the

signal

delayed

about

1.25

nanoseconds

from

the

triggering

signal.

TRIG

OUT

Connector:

Provides

triggering

signal

for

the

other

outputs.

The

CATHODE

BLANKING/PREAMP

switch

must be

set

PREAMP

get

either

the

PREAMP

RESOLUTION

CHECK

triggering

signal.

CAL

Connector:

Provides

input

for

clock

signal

from

the

7912AD.

SYNC

Probe:

Provides

input

for

sync

signal

from

the

7912AD.

Specifications

The

electrical

specifications

listed

Table

1-1

are

valid

within

the

environmental

limits

Table

1-2.

Also,

the

Calibration

Aid must be

calibrated

within

each

1000

hours

operation

each

six-month

period

operated

infrequently;

should

calibrated

ambient

temperature

+20

+30

degrees

after

five-minute

warm-up.

Statements

the

Performance

Requirements

column

are

verified

performing

the

calibration

procedure.

Statements

the

Supplemental

Information

column

are

not

construed

performance

requirements,

but

indicate

expected

performance.

1-2

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