Tektronix 7A13 User manual

Tektronix,

Inc

P.O

Box500

Beaverton,

Oregon

97077



Serial

Number

070-1948-00



First

Printing

APR

1975

MANUAL

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INFORMATION

'7A13

(SN

B200000-up)

SECTION

SPECIFICATION

Page

Introduction

1-1

Electrical

Characteristics

1-1

System

Characteristics

1-4

Environmental

Characteristics

1-4

SECTION

OPERATING

INSTRUCTIONS

Introduction

2-1

Front

Panel

Description

2-1

Test

Setup

Chart

2-2

Familiarization

Procedure

2-2

General

Operating

Information

2-5

SECTION

CIRCUIT

DESCRIPTION

Introduction

3-1

Block

Diagram

Description

3-1

Detailed

Circuit

Description

3-3

SECTION

MAINTENANCE

Preventive

Maintenance

4-1

Troubleshooting

4-2

Corrective

Maintenance

4-8

SECTION

PERFORMANCE

CHECK/CALIBRATION

Introduction

5-1

Test

Equipment

Required

5-1

Short-Form

Performance

Check/Calibration

Procedure

and

Index

5-5

Performance

Check/Calibration

Procedure

5-8

SECTION

ELECTRICAL

PARTS

LIST

Abbreviations

and

Symbols

Parts

Ordering

Information

SECTION

DIAGRAMS

AND

CIRCUIT

BOARD

ILLUSTRATIONS

Symbols

and

Reference

Designators

Voltage

and

Waveform

Conditions

SECTION

MECHANICAL

PARTS

LIST

Mechanical

Parts

List

Information

Index

Mechanical

Parts

Illustrations

Mechanical

Parts

List

Accessories

7A13

(SN

B200000-up)

Fig

1-1

7A13

Differential

Comparator

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



Common

Mode

7000

series

oscilloscopes

may

used

differential



Signal

Range

input

preamplifier

conventional

preamplifier

addition



mV/Div

its

use as a

comparator



mV/Div

;

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

100

kHz

permits

measurements

differential

signals

less

thanl

amplitude

on10volt

common-mode

signals

When

used

as a

differential

comparator,

the

7A13

has

effective

offset

range

10,000

divisions

Electrical

Characteristics

The

electrical

characteristics

described

fable

1-1

are

valid

over

the stated

environmental

range

instruments

calibrated

ambient

temperature

+20°C

to-+-30°C

and

after

20-minute

warmup

period unless

otherwise

noted

TABLE

1-1

(cont)

yV`

~Characteristic



Performance

Requirement

X10

mV/Div

50 mV/Div

;

X10

Out

V/Div

;

X10V

V/Div

;

X10V

Out

V/Div

5 V/Div

X10

Frequency

Response

Div

Reference)

Section

1---7A13

(SN

B200000-up)

least

+-10

and

-10

least

-+-100

and

---100

least

-i-500

and

---500

least

+500

and

-500

ELECTRICAL

Characteristic

TABLE

1-1

CHARACTERISTICS

PerformanceRequirement

FULL

Bandwidth

Upper

Limit

(Capacitive)

Coupled

Input

See

Table

1-4,

System

Charac-

teristics

less

Lower

Bandwidth

Deflection

Factor

Frequency

(VOLTS/DIV)

Calibrated

Range

mV/Div

V/Div,12

steps

MHz

Bandwidth

MHz

within

500

kHz

sequence

Gain

Ratio

Within

.5%

GAIN

adjusted

Accuracy mV/Div

Overdrive

Recovery

Recovers

within

Uncalibrated

Continuously

variable

extends

(1X Attenuator

(and

ms)

after

a pulse

(Variable)

deflection

factor

to at

least

mV/Div)

-110V

--10V, or

less,

V/Div

regardless

pulse

duration

Specification---7A13

(SN

B200000-up)

Common

Mode

Rejection

Ratio

mV/Div

X10Vc

100

kHz

Maximum

Input

Voltage

(Direct)

Coupled

Peak

mV/Div

50 mV/Div

;

X10

mV/Div

50 mV/Div

;

X10

Out

;

V/Div

;

"TABLE

1-1

(cont)

least

20,000

:1,

P-P

less

test

signal

least

10,000

:1,

P-P

less

test

signal

Decreases

500

MHz

with

P-P,

then

200

MHz

P-P

See

Fig

1-2

least

2,000

least

500

400

VDC,

400

Peak

AC,

kHz

less

TABLE

1-1

(cont)

Characteristic



Performance

Requirement

Input

and

Resistance

Maximum

Gate

Current

0°C

-1-35°C

Both

Inputs

Drift

With

Time

(Ambient

Temp-

erature

and

Line

Voltage

Con-

stant)

Short

Term

Long

Term

Drift

With

Ambient

Temperature

Line

Voltage

Con-

stant)

Displayed

Noise

Tangentially

Meas-

red)

Mfg

±0

.15%

Approximately

Within

between

all

deflection

factors

P-P

less

Div or

less

(whichever

greater)

any

minute

interval

within

hour

after

minutes

from

turn-on

P-P

less

or 0

Div

(whichever

greater)

during

any

hour

after

the

first

hour

and

minutes

from

turn-on

mV/10°

less,

Div/10°

less

(whichever

greater)

less

shift

within

20 ns

step

of fast rise

squarewave

when

switching

undriven

input

from

GND

400



less



mV/Div



Type

7700-Series

indicator

os-

cilloscope

0Vto±10V

.1%

setting

mV)

less

Specification-7A13

(SN

B200000-up)

noMME

MISM

EMMI

WEEM

OEMIMM

111NOW1110

6MI'll

ININMEMSE-11MM

nnuuW

Ism

nmn

. :

Fig

1-2

Common

mode

rejection

ratio

graph

pertains

mV/Div

through

mV/Div

deflection

factors

Specification--7A13

(SN

B200000-up)

Storage

Weight

TABLE

1-2

7A13

tested

alone

(separate

from

oscilloscope

mainframe)

ENVIRONMENTAL

CHARACTERISTICS

Characteristic

Performance

Requirements

a___

._._

._____

.___

.-~-

.~-

:-T

Temperature

Operating

System

Characteristics

+50

-55°

+75'C

15,000

feet

50,000

feet

Qualified

under

National

Safe

Transit

Committee

test

procedure

TABLE

1-3

PHYSICAL

CHARACTERISTICS

Size___

. .

Fits

all

7000-Series

plug

-in

com-

partments

Pounds

kilograms)

The

system

characteristics

listed

Table

1-4

specify

the

performance

the

plug-in

with

various

combinations

probesand

various

indicator

oscilloscopes

~'EXT

CAL

1 .5

TABLE

1-4

SYSTEM

CHARACTERISTICS

(Indicator

Oscilloscope

7500-Series

with

P6053B

Probe

'Accuracy

(%)

CAL

__2

1NT

CAL

100

(MHz)

(ns)

. .

.55_

._6

(Indicator

Oscilloscope

7700-Series

with

P6053B

Probe

._1_

.5 __j___1, :5

_1__

.5___1

3-555



'Accuracy

percentages

apply

all

deflection factors

Plug-in

GAIN

must be

set

the

deflection

factor

designated

the

applicable

position

the

VOLTS/DIV

switch

When

probe

used,

the

GAIN

mustbe

set

with

the

calibration

signal

applied

the

probe

tip

EXTernal

CALibrator,

0°C

h-50°C

The

plug-in

GAIN

set

(within

10°C

the

operating temperature) using

external

calibrator

signal

whose

accuracy

within

.25%

INTernal CALibrator,

-1-15°C

1-35°C

The

plug-in

GAIN

set

using

the

oscilloscope's

own

calibrator

and

the

instrument

operating

within the

+15o

-F

range

INTernal

CALibrator,

0°C

-1-50°C

The

plug-in

GAIN

set

(within

the operating

temperature)

using

the os-

cilloscope's

own

calibrator,

and

the

instrument

operating

within

the

0°

-1_50°

range

;



Illuminates



when



switch



S10,

1-50



located

left

side

plug-in,

VAR

ONLY



turned

This

indicates

Lamp



INPUT

and

INPUT

impedanceof

approximately

infinity

whenever

the

VOLTS/DIV

switch

set

between

and

mV,

VARIABLE

knob

pushed

and

probe

used

INTRODUCTION

This

section

opens

with

brief

functional

description

the

front

panel

controls

and

connectors

(see

Fig

2-1)

Following the

front-panel description

familiarization

procedureand

finally

general

discussion

the opera-

tion

the

7A13

FRONT-PANEL

DESCRIPTION

Fig

2-1

Front panel

7A13

and

location

R,,

switch

S10

Section

2----7A13

(SN

B200000-up)

NOTE

With

VOL

TS/DIV

switch

set

from

lamp

remains

but

input

impedance

-1

and

the

input attenuator

uncompensated

COMPARISON

VOLTAGE

(VC)

-I-

and



Selects

polarity

comparison

vol-

Pushbuttons

tage

VOLTS

DISPLAY



Reads

out the

equivalent

voltage

selected

the

COMPARISON

VOLTAGE

(Vc)

COARSE,

FINE,

VOLTS/DIV,

and

PULL

VAR

for

X10

controls

COARSE

Control



Varies

the

voltage

from

zero

ten

volts

2-'i

Operating

Instructions-7A13

(SN

B200000-up)

FINE

Control



Provides

precise

control

the

voltage

I-

INPUT

Connector

Provides

means

connection

for signal

measurement

also

contains a

third

contact

for

probe

attenuation

information

This

enables

proper

deflection

factor

display

the

CRT

screen,

and

proper

volts

display

7A13

INPUT

Mode



Selects

AC,DC,

GND

Mode

Switch



coupling

for

the

INPUT

channel

VOL"I`S/DIV

Switch



Selects

one

twelve

volts

per

division

calibrated deflection

fac-

tors

VOLTS/DIV

VARI-



Selects

uncalibrated

deflection

ABLE

CONTROL



factor

somewhere

between

the

twelve

settings

minium

times the

VOLTS/DIV

switch

set-

ting

provided

The

UNCAL

lamp

lights

when

the

VARIABLE

control

out

the

CAL

detent

PULL

VAR

FOR

X10



Extends

the

deflection

factor of

the

cSwitch



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



Selects

AC,DC,

GND

Mode

Switch



coupling

for

the

---

INPUT

channel

STEP

ATTEN

BAL



Adjusts

for

vertical

trace

move

Adjustment



ment

as the

VOLTS/DIV

switch

setting

varied

from

10 to

mV/DIV

GAIN

Adjustment



Adjusts

the

amplifier

gain

for

dis-

play

four

divisions

upon

receipt



a 4

signal

when

the

VOLTS/DIV

switch

set

and

the

VARIABLE

control

set

CAL

2-2

X10

BAL



Adjusts

for

vertical

trace

move

Adjustment



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

or 5

MHz

OUT

0-10

Jack



Provides

convenience

outlet

for

the

comparison

voltage

POSITION

Control



Positions

display

vertically

the

CRT

face

c REF-I

DENT



Internally

disconnects

both

sig

Pushbutton



nals

and

applies

both

inputs

Readout

display

replaced

by 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

immediateuse

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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