Tektronix 7A13 User manual

(ed

Tektronix,

Inc.

P.O.

Box

500

Beaverton,

Oregon

070-1948-00

Product

Group

Tektronix

COMMITTED

EXCELLENCE

PLEASE

CHECK

FOR

CHANGE

INFORMATION

THE

REAR

THIS

MANUAL...

—

7A13

DIFFERENTIAL

COMPARATOR

B200000-up

INSTRUCTION:

MANUAL

97077

Serial

Number

First

Printing

APR

1975

Revised

JUN

1986

1975

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

parel

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:

Bo00000

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

—

Section

7A13

(SN

B200000-up)

TABLE

CONTENTS

Page

SPECIFICATION

Introduction

......

0.0...

eee

1-1

Electrical

Characteristics

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

1-1

System

Characteristics

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

1-4

Environmental

Characteristics

........

1-4

OPERATING

INSTRUCTIONS

Introduction

.........

0.0.0.0

eee

2-1

Front

Panel

Description

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

2-1

Test

Setup

Chart

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

2-2

Familiarization

Procedure

...........

2-2

General

Operating

Information

.......

2-5

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.

Section

CIRCUIT

DESCRIPTION

INtrOGUCTION

.52.6

a:sty

es ea

eee

ese

3-1

Block

Diagram

Description

..........

3-1

Detailed

Circuit

Description

..........

3-3

REV

MAY

1982

Section

Page

MAINTENANCE

Preventive

Maintenance.............

4-1

Troubleshooting

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

4-2

Corrective

Maintenance

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

4-8

PERFORMANCE

CHECK/

CALIBRATION

INtFOGUCTION

«0s

eee

nimi

memsmen

5-1

Test

Equipment

Required............

5-1

Short-Form

Performance

Check/Calibration

Procedure

and

Index

5-5

Performance

Check/Calibration

Procedure

...........

0.00.

eee

5-8

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

Rin

COMPARISON

VOLTAGE

(Vc)

VAR

ONLY

COARSE

-®-

FINE

Lag

VOLTS/DIV

UNCAL

BAL

mer

-10KWT

Position

—

FULL

cos

Migs

DIFFERENTIAL

COMPAR

ATOR}

Fig.

1-1.

7A13

Differential

Comparator.

7A13

(SN

B200000-up)

1948-1

Section

1—7A13

(SN

B200000-up)

SPECIFICATION

Introduction

The

7A13

Vertical

Plug-In

coupled

differential

comparator

with

excellent

common-mode

rejection

and

medium

gain

characteristics

for

medium

level

applications.

The

7A13

designed

for

use

Tektronix

7000

series

oscilloscopes.

may

used

differential

input

preamplifier

conventional

preamplifier

addition

its

use

comparator.

the

differential

input

mode,

the

dynamic

range

allows

the

application

common-mode

signals

+10

—10

volts

applied

the

unit

without

attenuation.

Common-mode

rejection

ratio

least

20,000:1

100

kHz

permits

measurements

differential

signals

less

than

mVin

amplitude

volt

common-mode

signals.

When

used

differential

comparator,

the

7A13

has

effective

offset

range

10,000

divisions.

Electrical

Characteristics

The

electrical

characteristics

described

Table

1-1

are

valid

over

the

stated

environmental

range

instruments

calibrated

ambient

temperature

+20°C

+30°C

and

after

20-minute

warmup

period

unless

otherwise

noted.

TABLE

1-1

ELECTRICAL

CHARACTERISTICS

TABLE

1-1

(cont)

Characteristic

Performance

Requirement

Common

Mode

Signal

Range

mV/Div

mV/Div;

least

+10

and

—10

X10

mV/Div

mV/Div;

X10

Out

least

+100

and

—100

0.1

V/Div

0.5

V/Div;

X10

0.1

V/Div

0.5

V/Div;

X10

Out

least

+500

and

—500

V/Div

least

+500

and

—500

X10

Characteristic

Performance Requirement

Deflection

Factor

(VOLTS/DIV)

Calibrated

Range

mV/Divto5

V/Div,

12stepsina1,

sequence

Frequency

Response

Div

Reference)

FULL

Bandwidth

Upper

Limit

See

Table

1-4,

System

Charac-

teristics

(Capacitive)

less

Coupled

Input

Lower

Bandwidth

Frequency

MHz

Bandwidth

|DC

MHz

within

500

kHz

Gain

Ratio

Within

1.5%

GAIN

adjusted

Accuracy

mV/Div

Uncalibrated

Continuously

variable:

extends

(Variable)

deflection

factor

least

12.5

V/Div

Overdrive

Recovery

Recovers

within

(1X

Attenuator

(and

0.1

ms)

after

a pulse

mV/Div)

+10V

-—10V,

less,

regardless

pulse

duration.

1-1

Specification—7A13

(SN

B200000-up)

TABLE

1-1

(cont)

TABLE

1-1

(cont)

Characteristic

Common

Mode

Rejection

Ratio

mV/Div

X10

100

kHz

Performance

Requirement

See

Fig.

1-2.

least

20,000:1,

P-P

less

test

signal

Characteristic

Input

and

Resistance

Performance Requirement

+0.15%

Capacitance

and

Product

Approximately

20.0

Within

+1%

between

all

deflection

factors.

100

kHz

least

10,000:1,

P-P

less

MHz

test

signal

MHz

Decreases

500:1

MHz

with

MHz

P-P,

then

200:1

MHz

P-P.

See

Fig.

1-2.

mV/Div

mV/Div;

X10

Out;

Maximum

Gate

Current

0°C

+35°C

Both

Inputs

0.2nA

less

mV/Div)

(0.2

Div

+35°C

+50°C

Both

Inputs

Drift

With

Time

less

Div

mV/Div)

0.1

V/Div

V/Div:

(Ambient

Temp-

X10

Out

erature

and

Line

Voltage

Con-

kHz

least

2,000:1

stant)

Short

Term

P-P

less

0.1

Div

less

GOUpISd

teas}

EUW

(whichever

greater)

any

minute

interval

within

hour

after

minutes

from

turn-on.

Maximum

Input

Long

Term

P-P

less

0.1

Div

Voltage

(Direct)

Coupled

Peak

mV/Div

mV/Div;

X10

VDC,

Peak

AC,

kHz

less

mV/Div

mV/Div;

X10

Out

400

VDC,

400

Peak

AC,

kHz

less

0.1

V/Div

0.5

V/Div;

X10

(whichever

greater)

during

any

hour

after

the

first

hour

and

minutes

from

turn-on.

Drift

With

Ambient

Temperature

Line

Voltage

Con-

stant)

mV/10°C

less,

0.2

Div/10°C

less

(whichever

greater)

Amplifier

Crosstalk

less

shift

within

step

fast

rise

squarewave

when

switching

undriven

input

from

GND

0.1

V/Div

0.5

V/Div;

X10

Out

500

VDC.

500

Peak

AC,

kHz

less

Displayed

Noise

400

less

mV/Div

V/Div

Div;

X10

(Capacitive

Coupled

Input

500

VDC

Tangentially

Meas-

|Type

7700-Series

indicator

os-

ured)

cilloscope

Comparison

Voltage

Range

+10

Accuracy

(0.1%

setting

mV)

Electrical

Zero

0.5

less

OUT

Resistance

5.5

1-2

Specification—7A13

(SN

B200000-up)

d-d

SLIOA

ZHINOZ

ZHINOL

Aouebes4

ZHINL

1001

AOL

S}UIOg

UO}eDIjII8/,

leuBlg

3sey

jeplosnuig

epnyjdwy

d-d

juewasnbey

souews0j49g

YHIND

S@eAIND

OeY

UONDeleay

epoyy

UOWWIOD

L:OOL

L:000°L

L:100L

YYIND

Fig.

1-2.

Common

mode

rejection

ratio

graph.

pertains

mV/Div

through

mV/Div

deflection

factors.

1-3

Specification—7A13

(SN

B200000-up)

TABLE

1-2

7A13

tested

alone

(separate

from

oscilloscope

mainframe)

ENVIRONMENTAL

CHARACTERISTICS

Characteristic

Performance

Requirements

TABLE

1-4

SYSTEM

CHARACTERISTICS

(Indicator

Oscilloscope:

7500-Series

with

P6053B

Probe.)

‘Accuracy

(%)

Sig

Out

7EXT

*INT

“INT

Temperature

(MHz)

(ns)

CAL

(MHz)

(ns)

Operating

hen"

|4a7]15

Storape

55°C

+75°C

47/

Altitude

(Indicator

Oscilloscope:

7700-Series

with

P6053B

Probe.)

Operating

19,000

'Teet

100

[35]

Storage

50,000

feet

too

Qualified

under

National

Safe

Transit

Committee

test

procedure

1A,

Category

Il.

Transportation

TABLE

1-3

PHYSICAL

CHARACTERISTICS

Size

Fits

all

7000-Series

plug-in

com-

partments.

Weight

3.1

Pounds

(1.4

kilograms).

System

Characteristics

The

system

characteristics

listed

Table

1-4

specify

the

performance

the

plug-in

with

various

combinations

probes

and

various

indicator

oscilloscopes.

1-4

‘Accuracy

percentages

apply

all

deflection

factors.

Plug-in

GAIN

must

set

the

deflection

factor

designated

the

applicable

position

the

VOLTS/DIV

switch.

When

probe

used,

the

GAIN

must

set

with

the

calibration

signal

applied

the

probe

tip.

*EXTernal

CALibrator,

0°C

+50°C:

The

plug-in

GAIN

set

(within

10°C

the

operating

temperature)

using

external

calibrator

signal

whose

accuracy

within

0.25%.

3INTernal

CALibrator,

+15°C

+35°C:

The

plug-in

GAIN

set

using

the

oscilloscope’s

own

calibrator

and

the

instrument

operating

within

the

+15°C

+35°C

range.

“‘INTernal

CALibrator,

0°C

+50°C:

The

plug-in

GAIN

set

(within

10°C

the

operating

temperature)

using

the

os-

cilloscope’s

own

calibrator,

and

the

instrument

operating

within

the

0°C

+50°C

range.

INTRODUCTION

This

section

opens

with

brief

functional

description

the

front

panel

controls

and

connectors

(see

Fig.

2-1).

Following

the

front-panel

description

familiarization

procedure

and

finally

general

discussion

the

opera-

tion

the

7A13.

FRONT-PANEL

DESCRIPTION

Rin

1-50

VAR

ONLY

Lamp

IIluminates

when

switch

S10,

located

left

side

plug-in,

turned

cw.

This

indicates

INPUT

and

—

INPUT

impedance

approximately

infinity

whenever

the

VOLTS/DIV

switch

set

between

and

mV,

VARIABLE

knob

pushed

and

probe

used.

Section

2—7A13

(SN

B200000-up)

OPERATING

INSTRUCTIONS

NOTE

With

VOLTS/DIV

switch

set

from

lamp

remains

but

input

impedance

and

the

input

attenuator

uncompensated.

COMPARISON

VOLTAGE

(Vc)

and

—

Pushbuttons

VOLTS

DISPLAY

COARSE

Control

Selects

polarity

comparison

vol-

tage.

Reads

out

the

equivalent

voltage

selected

the

COMPARISON

VOLTAGE

(Vc)

COARSE,

FINE,

VOLTS/DIV,

and

PULL

VAR

for

X10

controls.

Varies

the

voltage

from

zero

ten

volts.

Rin

Switch

‘

“7A3

tins

USE

+50mvV

VARIN

ONLY

COMPARISON

VOLTAGE

(Vc}

COARSE

-®

FINE

VOLTS

VOLTS/DIV

UNCAL

STEP

ATTEN

BAL

}

i ®

UAL

nee.

POSITION

OUT

O-10V

DIFFERENTIAL

COMPARATOR]

1948-2

Fig.

2-1.

Front

panel

7A13

and

location

Rin

switch

S10.

2-1

Operating

Instructions—7A13

(SN

B200000-up)

FINE

Control

Provides

precise

control

the

voltage.

INPUT

Connector

Provides

means

connection

for

signal

measurement.

also

contains

third

contact

for

probe

attenuation

information.

This

enables

proper

deflection

factor

display

the

CRT

screen,

and

proper

volts

display

7A13.

INPUT

Mode

Switch

Selects

AC,

DC,

GND

Mode

coupling

for

the

—

INPUT

channel.

VOLTS/DIV

Switch

Selects

one

twelve

volts

per

division

calibrated

deflection

fac-

tors.

VOLTS/DIV

VARI-

ABLE

CONTROL

Selects

uncalibrated

deflection

factor

somewhere

between

the

twelve

settings.

minium

2.5

times

the

VOLTS/DIV

switch

set-

ting

provided.

The

UNCAL

lamp

lights

when

the

VARIABLE

control

out

the

CAL

detent.

PULL

VAR

FOR

X10

Switch

Extends

the

deflection

factor

the

VOLTS/DIV

Switch.

This

occurs

only

for

10, 20,

and

mV/DIV

and

.1,

.2,

and

V/DIV

settings

the

VOLTS/DIV

switch.

—

INPUT

Connector

Same

for

INPUT

connector.

INPUT

Mode

Switch

Selects

AC,

DC,

GND

Mode

coupling

for

the

—

INPUT

channel.

STEP

ATTEN

BAL

Adjustment

Adjusts

for

vertical

trace

move-

ment

as.

the

VOLTS/DIV

switch

setting

varied

from

mV/DIV.

GAIN

Adjustment

Adjusts

the

amplifier

gain

for

dis-

play

four

divisions

upon

receipt

4mvV_

signal

when

the

VOLTS/DIV

switch

set

and

the

VARIABLE

control

set to

CAL.

2-2

X10

BAL

Adjustment

Adjusts

for

vertical

trace

move-

ment

VARIABLE

(VOLTS/DIV)

knob

pulled

out.

VAR

BAL

Control

Adjusts

for

vertical

trace

move-

ment

VARIABLE

(VOLTS/DIV)

knob

varied

throughout

its

range.

Release

Latch

Pull

withdraw

plug-in

from

in-

dicator

oscilloscope.

Switch

Selects

either

the

FULL

bandwidth

MHz.

OUT

0-10

Jack

Provides

convenience

outlet

for

the

comparison

voltage.

POSITION

Control

Positions

display

vertically

the

CRT

face.

REF-IDENT

Internally

disconnects

both

sig-

Pushbutton

nals

and

applies

both

inputs.

Readout

display

replaced

the

word

“IDENTIFY”.

TEST

SETUP

CHART

Fig.

2-2

shows

drawing

the

front

panel

controls

and

connectors.

This

chart

can

reproduced

and

used

test

setup

record

for

special

measurements

and

applications,

may

used

training

aid

for

operation

the

7A13.

FAMILIARIZATION

PROCEDURE

First-Time

Operation

The

following

steps

are

intended

help

get

the

trace

the

CRT

screen

quickly

and

prepare

the

unit

for

immediate

use.

These

steps

are

intended

acquaint

you

with

some

the

basic

functions

the

7A13.

Insert

the

unit into

the

oscilloscope

vertical

plug-in

compartment.

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