Tektronix 7B70 User manual

BLEO

CTION

CTIO

ICATIO

age

Intro

uction

1-1

lectrical

aracteristics

1-1

Swee

ate

1-1

Swee

Accuracy

1-1

Swee

ength

1-1

Swee

-Off

Time

1-1

xternal

orizontal

lifier

1-1

Deflection

actor

1-1

uency

onse

1-2

Trigger

Sensitivity

1-2

Internal

Trigger

itter

1-2

xternal Trigger

1-2

Auto

Sensitivity

1-2

nvironmental

aracteristics

Altitu

1-2

ysical

aracteristics

inis

1-2

Dimensions

1-2

eig

1-2

PER

ATI

CTIO

General

2-1

Installation

2-1

ront

Pan

Controls

2-1

Test Setu

art

2-4

General

erating

Information

2-4

Swee

Calibration

2-4

Sim

lifie

erating

Instructions

2-4

ormal

Swee

p2-6

agnifie

Swee

p2-6

Delaye

Swee

p2-6

button

Switch L

ogic

2-6

Triggere

2-6

Trigger

ode

2-7

Trigger

Cou

ling

2-8

Trigger

Source

2-9

Trigger

Slo

e2-10

Trigger

evel

2-10

orizontal

Sweep R

ate

2-10

Sweep

agnifier

2-12

orizontal

osition

Control

2-12

Display

e2-12

BLE

(cont)

CTIO

PER

ATI

CTIO

(cont)

Page

lications

2-13

General 2-13

uency

Com

arison

2-13

Time

Duration

easurements

2-14

Determining

uency

2-15

Risetime

easurements

2-15

Delaye

Sweep

Time

easurements

2-16

Delaye

Swee

ification

2-17

Dis

laying

Com

lex

Signals

sing

Delayed

Swee

p2-18

Pulse

itter

easurements

2-18

ase

easurements

2-19

CTIO

TIO

Intro

uction

3-1

loc

Diagram

Descri

tion

3-1

Detaile

Circuit

Descri

tion

3-1

Trigger

3-1

Trigger

lifier

3-2

Stage

3-3

Peak Detector

3-3

Slo

Com

arator 3-4

Out

Stage

3-4

Trigger

Generator

3-4

Trigger

Pulse

Generator

3-4

Sweep

Gate

Stage

3-4

Triggere

-Off

Stage

3-5

rig

ine

Auto

3-5

External

orizontal

lifier

3-5

Time-

ase

Generator

3-6

General

3-6

ormal

Trigger

ode

eration

3-7

Single

Swee

eration

3-8

Alternate

eration

3-8

Delaye

Swee

eration

3-9

orizontal

Pream

p3-9

Rea

dou

loc

k3-9

CTIO

ENAN

reventive

aintenance

4-1

General

4-1

Cleaning

4-1

isual Ins

ection

4-1

Transistor

4-1

Recalibration

4-1

TABLE

CONTENTS

(cont)

CHANGE

INFORMATION

Abbreviations

and

symbols

used

in this

manual

are

based

taken

directly

from IEEE

Standard

260

"Standard

Symbols

for

Units",

MIL

STD-12B

and

other

standards

the

electronics

industry

Change

information,

any,

located

the

rear

this

manual

SECTION

MAINTENANCE

(cont)

Page

Troubleshooting 4-2

Troubleshooting

Aids

4-2

Troubleshooting

Equipment

4-3

Troubleshooting

Techniques

4-3

Corrective

Maintenance

4-5

Obtaining

Replacement

Parts

4-5

Soldering

Techniques

4-6

Component

Replacement

4-7

Instrument

Repackaging

4-8

SECTION

PERFORMANCE

CHECK/CALIBRATION

Introduction

5-1

Test

Equipment

Required

5-1

Short

Form

Procedure

5-2

Performance

Check/Calibration

Procedure

5-4

General

5-4

Preliminary

Control

Settings

5-4

Check/Adjust

Steps

(refer

Short-Form

Procedure

for

index

steps)

5-5

SECTION

ELECTRICAL

PARTS

LIST

Abbreviations

and

Symbols

Parts

Ordering Information

Index

Electrical

Parts

List

SECTION

DIAGRAMS

AND

MECHANICAL

PARTS

ILLUSTRATIONS

Diagrams

Mechanical

Parts

Illustrations

SECTION

MECHANICAL

PARTS

LIST

Mechanical

Parts

List

Information

Index

Mechanical

Parts

Illustrations

Mechanical

Parts

List

Accessories

Intro

uction

CTIO

ΤΙΟ

ange

info

mation,

any,

affecting

sectio

will

found

ear

αηυαΙ

The

71370

Time

Base

nit

designed

specifically

use

with

onix 7700-se

ies

oscillosco

However,

it is

com

ati

wit

all

7000-series

oscillosco

71370

rovi

cali

rate

swee

from

secon

ivision

.02

microsecond

ivision

exten

s t

cali

rate

sweep

nanosecon

s/divisio

Swee

rates

may

varie

continuously

cali

rate

)

between

cali

ra-

ste

Swee

trigge

ing

200

mega

e r

or ve

tical

.am

lifier

andwi

ever

less

71370

featu

external

orizontal

lifie

display

sig

als

applie

BLE

1-1

ELE

ICA

ACT

ISTICS

ΕΧΤ

ector

swee

free-

runs

ro-

eα

rig

ase

line

he a

senceof ade

uate

triggeri

sig

trigge

ePerformance

k P

give

Section

provi

convenient

met

hod of

ing

performance

str

ment

following

electrical

aracteristics

apply

ient

tem

eratu

+50

less

erwise

note

armu

ptime

for

give

accu

acy

utes

aracte

istic

Performan

xclu

Following

Start

Swee

;

ortio

Magni-

fie

Swee

End

Swee

;

beyon

100

ivisions

Swee

h 10

ivisio

Sweep

-Off

Time

to 5

times

TIME/DIVISION

set-

ting

less

microseconds

less

.02

s/div

External

izontal

Amplifier

Deflection

Factor

ΕΧΤ

BLE

millivolts/

ivisio

n with

milli-

ully

Cloc

volts/

ivisio

wise

ΕΧΤ

BLE

250

millivolts/

ivision

with

lly

Cloc

millivolts/divisio

wise

BLE

least

ange

aracteristic

Perfo

Swee

ate

Calibrate

ange 5 secon

s/division

.02

micro-

secon

d/d

ivision

1-2-5

quen

mag

ifier

extends

swee

rate

nanosecond

s/divisio

BLE

ange

tin

ously

etween

cali-

(uncalibrated)

rated

sweep

ates

Exten

cali-

ate

swee

ate

at least

secon

ivision

Sweep

Accu

acy

easure

7700-series

mainframe

Time

Interval

+15

+35

+50

Ove

Center

nmag

s/div

and0

.5%

4% 5%

s/div

.02

s/div

ms/div

.5%

3% 4%

Over

any 2

div

interval

with

5% 7%

ter

div

Specification-71370

instrument

will

meet

electr

ical

acter

istics

given

Table

1-1

over

following

environme

tal

limits

Altitude

Non-operating

inis

Dimensions

eig

BLE

1-2

ENV

NMEN

HAR

ACT

ISTICS

aracteristic

aracte

istic

BLE

1-1

(cont)

mance

50,000

feet

and

-55

BLE

1-3

YSICA

ACT

ISTICS

erformance

ront

panel

ano

ize

aluminum

.583

inc

es lo

.75 inc

y 5

inc

roximately

.88

ounds

aracte

istic

formance

xte

nal

igger

Input

aximum

500

volts

(DC

AC)

500

oltage

volts

(P-

AC)

ilo

ertz

less

Input

and

mego

with

2°/

picofarads

with

icofa

ads

evel

(

xcl

ing

TO)

ΕΧΤ

least

volts

-1

volts

ΕΧΤ

least

+15

volts

-15

volts

Operation

Sensitivity

div

Internal,

125

millivolts

Ex-

ternal,

200

to 20

MHz

Upp

fre

ency

andamplitude

limits

same

igger

Sensiti-

vity

uency

igge

on 50

ertz,

ivision

espon

sig

BLE

1-1

(cont)

acteristic

Performance

Frequency

System

-3

7700-series

esponse

oscillosco

ower

-3

pper

-3

AC,

REJ,

ertz

100

ilo

ertz

REJ

-----

100

ilo

ertz

Trigge

Sensitivity

Triggering

inimum

Trig-

ncy

gering

Signal

ange'

uired

Cou

ling

ΙΝΤ

ΕΧΤ

MHz

div

MHz

375

200

REJ

div

MHz

div

275

200

ACHF

REJ

30 H

zto

div

375

200

MHz

'On

ter

Triggering

Only

;

the

specified

-3

fre

uency

ertical

System

laces

upp

limit

frequencies

ove

table

hen

he nu

mber

greater

-3

fre

quen

the

ertical

System

ill

not

trigger

sine

waves

divisions

less

internal

volts

external

below

120

Single

Swee

Triggering

uirements

same

αε

normal

sweep

triggere

swee

generator

oduces οηε

sweep only

Internal

Trigge

r J

itte

nanosecon

less

150

mega

ertz

General

CTIO

OPERATING

INSTRUCTIONS

ange

information,

affecting

section

will

found

he rear

manual

71370

lug-in

unit

erates

with

ktronix

7000-series

icator

oscilloscope

andα

7A-series

vertical

lug-in

unit

form

com

lete

oscillosco

system

effectively

use

71370

its

eratio

and

abilities

ould

nown

section

escribes

he op

eration

front-

anel

controls,

gives first-time

general

era-

ting

informatio

lists

some

basic

app

licatio

for

instrument

Installation

71370

designe

dto

erate

he horizo

tal

lug-in

com

artments

troni

x7000-series

oscillosco

71370

can

also

stalle

vertical

lug-in

com

artment

to p

rovi

swee

runs

vertically

How-

ever,

used

in t

manner,

ere

retrace

blank

ing

internal

triggering

rovision

and

he unit

not

eet

ecifications

given

Section

instructions

manual

are

written

for

use of

71370

αh

orizontal

lug-in

com

artme

oscillosco

71370

used

wit

h an

oscillosco

h h

two

orizontal

lug-in

artments,

install

unit

in t

(rig

com

artment

hen,

αd

elaying-swee

punit

installe

-in t

AYI

TIME

)

com

art

ent,

elayed

-swee

pop

eration

available

71370

will

erate

2-1

ocatio

elease

latc

erating

Instructions-71370

rop

erly in

com

artment

for

all

orizontal

eration

exce

delaying

swee

install

71370

into

lug-in

com

artment,

push

until

fits

firmly into

icator

lug-in

com

art-

ment

remove,

pull

release

latc

(see

2-1)

disengage

unit

from

e in

icato

pull

out

plug-in

com

art

ent

oug

horizon

tal

gain

icator

oscillosco

stan

ize

minimize

ustment

hen

inserting

lug-in

units,

eep

calibration

71370

ould

eck

hen

it is

inserted

into

t h e

indicator

verify

measure

ent

accuracy

he procedure

for

hecking

unit

give

under

Swee

pCalibration

heck

section

General

Triggering

Controls

VEL

IG'D

T-

CON

All

controls

uire

dfor

he o

eration of

71370

are

locate

fro

anel of

e un

(see

2-2)

full

use of

t h e

cap

abilities

instrument,

t h

erator

ould

familiar

with

unction

use of

each of

hese controls

brief

escri

tion

front-

pan

controls

connector

ere

ore

detaile

information

given

General

erating

Information

Selects

litude

point an

slo

pe of

trigger

signal

swee

triggere

ica-

tor

line

he outer

ring

left

center,

swee

triggere

ositive-going

slo

e of

trigger

signal,

own

positive-going

waveform

rig

center,

sweep

trig-

gere

he negative-going

slo

pe of

trigger

signal as

own

negative-going

waveform

ig h

icates

swee

triggere

will

uce

lay

wit

correct

setting

POSI-

TION

control

hecontrols

associate

vertical

unit

and

indi-

cator

oscillosco

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