Tektronix 7934 Manual de usuario

OPERATORS

Part

No.

070-5879-00

MANUAL

Product

Group

No.

7934

OSCILLOSCOPE

The

following

service

instructions

are

for

use

quali-

fied

personnel

only.

avoid

personal

injury,

not

perform

any

service

other

than

that

contained

op-

erating

instructions

unless

you

are

qualified

so.

Refer

Operators

Safety

Surnmary

and

Service

Summary

prior

performing

any

service.

Please

Check

for

CHANGE

INFORMATION

the

Rear

This

Manual

First

Printing

MAY

1986

Tektronix.

COMMITTED

EXCELLENCE

1986

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.

Printed

U.S.A.

Specification

and

price

change

privileges

are

reserved.

Tektronix,

Inc.

P.O.

Box

500

Beaverton,

Oregon

97077

Serial

Number.

7934

Operators

TABLE

CONTENTS

Page

LIST

ILLUSTRATIONS...

0.0..c.

cece

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Section2

OPERATING

INSTRUCTIONS

(cont)

LIST

TABLES...

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ccescececeeueeeees

OPERATORS

SAFETY

SUMMARY.............-

TRIGGERING

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

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2-8

7934

FEATURES

00...

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READOUT.....

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2-8

BEAMFINDER.

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Section

GENERAL

INFORMATION

CALIBRATOR

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INTRODUCTION

2.00...

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Z-AXIS INPUT.

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OPERATOR'S

MANUAL...........

STORAGE

OPERATION

oso:

INSTRUCTION

MANUAL

DETAILED

OPERATING

INFORMATION

2-14

INSTALLATION

22...

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GRATICULE

«sesso

serene

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INITIAL

INSPECTION...

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1-4

LIGHT

FILTER.

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OPERATING

POWER

INEORMATION

1.2

CONTROL

ILLUMINATION.

........

211

POWER

CORD

INFORMATION

.....

1-2

INTENSITY

CONTROLS.

.......

att

OPERATING

VOLTAGE

...........

DISPLAY

FOCUS

«1s.

soos

OPERATING

TEMPERATURE

......

4-2

ASTIGMATISM

AND

FOCUS

OPERATING

POSITION

..........-

ADJUSTMENTS.

«2-0

2se

sss

PACKAGING

FOR

SHIPMENT

BEAMFINDER.

..0..0.0..0-000005

2-12

SPECIFICATION

.....0..0.0c0ec

cues

1-4

TRACE

ALIGNMENT

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

a12

ELECTRICAL

CHARACTERISTICS...

1-4

READOUT

DISPLAY...

...-

4...

242

ENVIRONMENTAL

tat

READOUT

IDENTIFY

...........-.

2013

PHYSICAL

‘ie

READOUT

INTENSITY...........-

213

SYSTEM

ELECTRICAL

SPECIFICATION

1-13

READOUT

MODES

woos

218

PLUG-IN

INCOMPATIBILITIES.

.....

4-14

READOUT

OPERATION

WITH

7934

OSCILLOSCOPE

VERTICAL

STORAGE

|...

serene

218

SYSTEM

SPECIFICATION.

......

4-46

NORMAL

READOUT

MODE...

218

7934

OSCILLOSCOPE

HORIZONTAL

BISTABLE

AND

VAR

PERSIST

2-14

SYSTEM

SPECIFICATION.

......

4-17

FAST

BISTABLE

AND

FAST

SPECIAL

PURPOSE

PILUG-IN

UNITS

1-18

VAR

PERSIST

.....

0...

214

STANDARD

ACCESSORIES

.........

4-19

PULSED

READOUT

MODE......

at4

RECOMMENDED

ACCESSORIES...

4-49

BISTABLE

.....-....

0-005

214

VAR

PERSIST......0.0-.0--

214

Section

OPERATING

INSTRUCTIONS

FAST

BISTABLE

..«--

+++.

etd

FAST

VAR

PERSIST.

........

2-14

PLUG-IN

UNITS.

oo...

eee

2-1

READOUT

WITH SAVE

STORAGE

INSTALLATION

PLUG-IN

UNITS

2-1

MODE

.....-..s.

ceceaees

244

CONTROLS

AND

CONNECTORS

.....

2-1

SAVE

WITH

NORMAL

FRONT-PANEL

COLOR

CODING

...

2-1

READOUT...............

2-14

OPERATOR'S

CHECKOUT

SAVE WITH

PULSED

PROCEDURE

................04.

2-1

READOUT........0.....-

2-14

TEST

EQUIPMENT

REQUIRED...

REDUCED

SCAN

MODE..........

214

PRELIMINARY

SET

UP...........

STORAGE

DISPLAY..............

2-14

DISPLAY

FOCUS

«20...

0.0.

eee

BISTABLE

STORAGE

..........

244

TRACE

ALIGNMENT

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

VARIABLE

PERSISTENCE

GRATICULE

ILLUMINATION

.......

2.7

STORAGE...

cscs

244

CONTROL

ILLUMINATION.

00.0...

2-7

FAST

STORAGE

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

2.45

VERTICAL

DEFLECTION

SYSTEM...

2-7

ERASE.............0seeee.

2-15

HORIZONTAL

DEFLECTION

SAVE

MODE

«0.0...

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245

SYSTEM...

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2-7

CARE

STORAGE

SCREEN

.....

2-16

7934

Operators

Page

Section

OPERATING

INSTRUCTIONS

(cont)

VERTICAL

AND

HORIZONTAL

MODE

COMBINATIONS

.............-,

2-16

VERTICAL

MODES

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

2-16

LEFT

RIGHT

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

2-16

ALTERNATE

MODE............

2-16

CHOPPED

MODE

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

2-17

ALGEBRAIC

ADDITION.........

2-17

HORIZONTAL

MODES............

2-18

AOR

Boo.

eee eee

2-18

ALTERNATE

MODE............

2-18

CHOPPED

MODE

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

2-18

HORIZONTAL

SELECTION

......

2-18

VERTICAL

TRACE

SEPARATION

...

2-18

TRIGGER

SOURCE

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

2-18

CALIBRATOR

OUTPUT

...........

2-19

VOLTAGE

2.66.

eee

2-19

CURRENT

....

0...

eee

ee eee

2-19

REPETITION

RATE

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

2-19

WAVE

SHAPE,

.....--.-

creas

2-19

SIGNAL

OUTPUTS.

...........54-

2-19

SAWTOOTH

OUT...........

2-19

GATE

OUT...

eee

2-19

VERTICAL

SIGNAL

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

2-19

PROBE

POWER...............

2-20

DISPLAY

PHOTOGRAPHY.........

2-20

INTENSITY

MODULATION.........

2-20

REMOTE

INPUT

SIGNALS

........

2-20

REMOTE

RESET

INPUT.

.......

2-24

REMOTE

ERASE

INPUT........

2-21

REMOTE

SAVE

INPUT.........

2-21

TABLE

CONTENTS

(cont)

REMOTE

STORAGE

GATE

INPUT

2-21

Page

Section

OPERATING

INSTRUCTIONS

(cont)

APPLICATIONS

......00.00

00002

2-21

VERTICAL

AMPLIFIER

PLUG-IN

UNITS.

cece

ees

2-21

SINGLE-TRACE..............,

2-21

DUAL-TRACE.

...........00

008

2-21

THREE-TRACE

...........005.

2-21

FOQUR-TRACE

.......0,..00005

2-21

TIME-BASE

PLUG-IN

UNITS.......

2-21

SAMPLING

DISPLAYS...........-

2-22

SINGLE-TRACE

SAMPLING

.....

2-22

DUAL-TRACE

SAMPLING.

......

2-22

X-¥

SAMPLING

0.0.0.0

eee

2-22

SPECIAL

PURPOSE

PLUG-IN

UNITS

2-22

DIGITAL

COUNTERS

AND

MULTIMETER

PLUG-IN

UNITS

2-22

READOUT

ACCESS

PLUG-IN

UNIT.

22...

2-22

TRANSISTOR

CURVE-TRACER

PLUG-IN

UNIT.

.........-0-.

2-22

SPECTRUM

ANALYZER

PLUG-IN

UNITS

©...

00...

2-23

X-Y

OPERATION.

........0.-

0006

2-23

RASTER

DISPLAYS........--.6--

2-23

Section

INSTRUMENT

OPTIONS

OPTION

1.2...

cece

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3-1

OPTION

066...

cee

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CHANGE

INFORMATION

LIST

ILLUSTRATIONS

Fig.

No.

Page

FRONTISPIECE.

7934

FEATURES

.......

1-1.

7934

DIMENSIONAL

DRAWING..........

1-12

2-1.

FRONT-PANEL

CONTROLS, CONNEC-

TORS,

AND

INDICATORS.

..........+-.

2-2

2-2.

REAR-PANEL

CONTROLS

AND

CONNECTORS.

..0

eee

2-4

2-3.

DEFINITION

GRATICULE

MEASURE-

MENT

LINES..........0.....0...0005-

2-11

2-4.

LOCATION

READOUT

THE

CRT

IDENTIFYING

THE

ORIGINATING

PLUG-IN

AND

CHANNEL...

...............000005

2-13

2-5.

LOCATION

READOUT

THE

CRT

WHEN

REDUCED

SCAN

SELECTED...

2-13

LIST

TABLES

Table

No.

Page

1-1.

POWER-CORD

CONDUCTOR

IDENTIFICA-

TION,

Coc

cece

eee

ence

eee

tne

1-2

1-2.

POWER-CORD

AND

PLUG

IDENTIFICATION...

00.0...

eee

1-3

1-3.

SHIPPING

CARTON

TEST

STRENGTH....

1-3

1-4,

ELECTRICAL

CHARACTERISTICS.

......

1-4

1-5.

ENVIRONMENTAL.

...............0005

1-11

1-6.

PHYSICAL.

occ

eee

1-12

1-7.

PLUG-IN

INCOMPATIBILITIES.

.........-

4-14

1-8.

7934

OSCILLOSCOPE

VERTICAL

SYSTEM

SPECIFICATION,

«0.000000

cece

eee

ene

1-16

1-9.

7934

OSCILLOSCOPE

HORIZONTAL

SYSTEM

SPECIFICATION.

............-

1-17

1-10.

SPECIAL

PURPOSE

PLUG-IN

UNITS.....

1-18

2-1.

DISPLAY

COMBINATIONS..........2565

2-16

3-1.

OPTION

INFORMATION

LOCATOR.......

3-2

7934

Operators

7934

Operators

OPERATORS

SAFETY

INFORMATION

The

following

general

safety

information

applies

all

operators

and

service

personnel.

Specific

warnings

will

found

throughout

the’

manual

where

they

apply

and

should

followed

each

instance.

WARNING

statements

identify

conditions

practices

which

could

result

personal

injury

loss

life.

CAUTION

statements

identify

conditions

practices

which

could

result

damage

the

equipment

other

property.

The

word

DANGER

the

equipment

identifies

areas

immediate

hazard

which

could

result

personal

injury

loss

life.

The

following

safety

symbols

may

appear

the

equipment.

CAUTION-——-Refer

manuai

DANGER—High

voltage

ee)

Protective

ground

(earth)

terminal

This

instrument

operates

from

single-phase

power

source.

has

three-wire

power

cord

and

two-pole,

three-terminal

grounding-type

plug.

The

voltage

ground

(earth)

from

either

pole

the

power

source

must

not

exceed

the

maximum

rated

operating

voltage—250

volts.

Other

warning

symbols

where

they

apply.

Power

Source

and

Connection

Before

making

connection

the

power

source,

determine

that

the

instrument

adjusted

match

the

voltage

the

power

source,

and

has a

suitable

two-pole,

three-terminal

grounding-type

connector.

Refer

any

changes

qualified

service

personnel.

Grounding

the

Instrument

This

instrument

safety

class

equipment

(IEC

designation).

All

accessible

conductive

parts

are

directly

connected

through

the

grounding

conductor

the

power

cord

the

grounding

contact

the

power

connector.

The

power-input

plug

must

only

inserted

mating

receptacle

with

grounding

contact.

not

defeat

the

grounding

connection.

Any

interruption

the

grounding

connection

can

create

electric-shock

hazard.

Refer

qualified

service

personnel

for

verification

adequate

protective

grounding

system

which

this

instrument

connected.

For

electric-shock

protection,

the

grounding

connection

must be

made

before

making

connection

the

instrument’s

input

output

terminals.

Not

Remove

instrument

Covers

To avoid

electric-shock

hazard,

operating

personnel

must

not

remove

the

protective

instrument

covers.

Component

replace-

ment

and

internal

adjustments

must

made

qualified

service

personnel

only.

Not

Remove

CRT

implosion

Shield

not

remove

the

clear

plastic

implosion

shield

covering

the

ert

face

plate.

This

crt

implosion

shield

provides

protection

the

operator

from

crt

implosion.

7934

Operators

Not

Operate

Explosive

Atmosphere

avoid

explosion,

not

operate

this

instrument

explosive

atmosphere

unless

has

been

certified

for

such

operation.

Refer

fuse

replacement

qualified

prersonnel

only.

To avoid

fire

hazard,

use

only

the

fuse

specified

the

parts

list

for

your

in-

strument

and

which

identical

the

following

respects:

Use

the

Proper

Fuse

Type:

Slow

blow,

fast

blow,

etc.

Voltage

rating:

250

etc.

Current

rating.

Operating-Power

Considerations

prevent

damage

the

instrument

always

check

the

LINE

VOLTAGE

SELECTOR

switch,

located

the

rear

the

instrument,

before

connecting

the

instrument

the

supply

circuit.

Exercise

Care

with

intensity

Level

Crt

phosphor

damage

can

occur

under

adverse

conditions.

Avoid

any

condition

where

extremely

bright,

sharply-focused

dot

exists

the

ert.

Also,

remember

that

the

light

filter

reduces

the

apparent

light

output

from

the

crt.

Prevent

Instrument

Damage

Plug-in

units

should

not

installed

removed

without

first

turning

the

instrument

power

off,

prevent

instrument

damage.

7934

Operators

7934

FEATURES

The

Tektronix

7934

Storage

Oscilloscope

solid-state,

wide-bandwidth

instrument

designed

for

fast-writing

speed

storage

applications.

Three

display

modes

are

available

—

Nonstore,

Store,

and

Save;

well

four

storage

modes

—

Bistable,

Variable Persistence,

Fast

Bistable,

and

Fast

Variable Persistence.

addition,

the

Reduced

Scan

feature

increases

the

stored-writing

speed

capability.

The

7934

accepts

four

Tektronix

7000-series

plug-in

units.

The

flexibility

the

plug-in

feature

and

variety

plug-in

units

available

allows the

system

used

for

many

measurement

applications.

The

left

pair

plug-in

compartments

are

reserved

for

vertical

deflection

and

the

right

pair

are

reserved

for

horizontal

deflection.

Electronic

switching

between

each

pair

produces

multi-trace

vertical

and/or

horizontal

displays.

Power

supply

voltages

are

closely

regulated

maintain

instrument

performance

when

variations

line

voltage,

line

frequency,

plug-in

load occur.

The

light-weight,

high-efficiency

power

supply

operates

from

115-

or 230-volt

nominal

supply

sources

(50

400

hertz).

Section

1—7934

Operators

GENERAL

INFORMATION

INTRODUCTION

Operator’s

Manual

The

Operator's

Manual

divided

into

three

main

sections.

Section

—

General

information

contains

instrument

description,

electrical

specifications,

environmental

charac-

teristics,

standard

and

recommended

accessories,

installa-

tion,

and

instructions

for

packaging

for

shipment.

Section

—

Operating

Instructions

contains

informa-

tion

relative

operating

and

checking

the

instrument

operation.

Section

—

Instrument

Options

contains

description

available

options

and

gives

the

location

the

associated

information

for

those

options.

Instruction

Manual

The

Instruction

Manual

contains

both

operating

and

ser-

vicing

information

for

the

7934

Storage

Oscilloscope.

Sec-

tions

through

the

Instruction

Manual

contain

the

same

information

Sections

through

the

Operator's

Man-

ual;

the

remaining

sections

the

Instruction

Manual

are

follows:

The

additional

sections

the

Instruction

Manual

con-

tain

servicing

instructions.

These

servicing

instruc-

tions

are

for

use

qualified

service

personnel

only.

avoid

electric

shock

other

personal

injury,

not

perform

any

servicing

other

than

that

described

the

Operating

instructions

unless

you

are

qualified.

Section

—

Theory

Operation

contains

basic

and

general

circuit

analysis

help

understanding

the

opera-

tion

of the

instrument

and

that

may

useful

for

servicing

the

instrument.

Section

—~

Maintenance

describes

routine

and

correc-

tive

maintenance

procedures

with

detailed

instructions

for

replacing

assemblies,

subassemblies,

and

individual

compo-

nents.

Section

—

Checks

and

Adjustments

contains

proce-

dures

check

the

operational

performance

and

electrical

characteristics

the

instrument.

Procedures

also include

methods

for

adjustment

the

instrument

meet

specifications.

Section

—

Replaceable

Electrical

Parts

contains

in-

formation

necessary

order

replaceable

paris

and

assem-

blies

the

electrical

functions

the

instrument.

Section

—

Diagrams

and

Circuit

Board

Iliustrations

includes

detailed

circuit

schematics,

locations

assembled

boards

within

the

instrument,

voltage

and

waveform

in-

formation,

circuit

board

and

schematic

component

locators,

and

locations

adjustments

aid

performing

the

adjust-

ment

procedure.

Section

—

Replaceable

Mechanical

Paris

includes

information

necessary

order

replaceable

mechanical

parts

and

shows

exploded

drawings

which

identify

assemblies.

INSTALLATION

initial

Inspection

This

instrument

was

inspected

both

mechanically

and

electrically

before shipment.

should

free

mars

scratches

and

should

meet

exceed

all

electrical

specifica-

tions.

confirm

this,

inspect

the

instrument

for

physical

damage

incurred

transit

and

test

the

electrical

perfor-

mance

following

the

Operator's

Checkout

Procedure

the

Operating

Instructions,

Section

and

the

Performance

Check

given

Checks

and

Adjustments,

Section

the

instruction

Manual.

there

damage

deficiency,

contact

your

local

Tektronix

Field

Office

representative.

1-1

General

Information—7934

Operators

Operating

Power

Information

This

Instrument

can

be operated

from

either

115-volt or

230-volt

nominal

supply

source,

440

hertz.

CAUTION

prevent

darnage

the

instrument,

always check

the

setting

the

LINE

VOLTAGE

SELECTOR

switch

located

the

rear

panel

the

instrument

before

connecting

the

instrument

the

supply

circuit.

WARNING

POWER

SOURCE

AND

CONNECTION,

This

in-

sirument

operates

from

single-phase

power

source.

has

three-wire

power

cord

and

two-pole,

three-

terminal

grounding-type

plug.

The

voltage

ground

(earth)

from

either

pole

the

power

source

must

not

exceed

the

maximum

rated

operating

voltage

—

250

volts.

GROUNDING.

This

instrument

safety

class

equip-

ment

(IEC

designation).

All

accessible

conductive

parts

are

directly

connected

through

the

grounding

conductor

the

power

cord

the

grounding

contact

the

power

plug.

The

power

input

plug

must

only

inserted

mat-

ing

receptacle

with

grounding

contact.

not

defeat

the

grounding

connection.

Any

interruption

the

grounding

connection

can

create

electric

shock

hazard.

For

electric

shock

protection,

the

grounding

connec-

tion

must be

made

before

making

connection

the

instrument's

input

output

terminals.

Power

Cord

Information

power

cord

with

the

appropriate

plug

configuration

supplied

with

the

7934.

you

need

change

the

power

plug,

refer

Table

1-1

and

Table

1-2

for

power-cord

and

plug

identification

information.

Table

1-1

POWER-CORD

CONDUCTOR

IDENTIFICATION

Conductor

Color

Alternate

Color

Ungrounded

(Line)

Brown

Black

Grounded

(Neutral)

Blue

White

Grounded

(Earthing)

Green-Yellow

Operating

Voltage

The

LINE

VOLTAGE

SELECTOR

switch

(located

the

rear

panel)

allows

selection

115-volt

or 230-volt

nominal

line

voltage

operation.

convert

from

115-volt

230-volt

operation,

change

the

power

cord

and

plug to

match

the

power-source

receptacle.

Then

use

smail

screwdriver

move

the

LINE

VOLTAGE

SELECTOR

switch

the

desired

range.

Operating

Temperature

The

7934

can be

operated

where

the

ambient

air

tem-

perature

between

and

+50°

This

instrument

can

stored

ambient

temperatures

from

—55

+75°

After

storage

temperatures

outside

the

operating

limits,

allow

the

chassis

temperature

reach

safe

operating

limit

be-

fore

applying

power.

The

7934

cooled

air

drawn

through

holes

the

top, side,

and bottom

panels

and

blown

out

through

the fan

exhaust.

ensure

proper

cooling

the

instrument,

main-

tain

the

clearance

provided

the

feet

the

bottom

and

allow

least

two

inches

clearance

(more

possibie)

the

top,

sides,

and

rear

the

instrument.

Operating

Position

bail-type

stand,

mounted

the

bottom

the

instru-

ment,

permits

the

instrument

tited

about

10°

for

convenient

crt

viewing.

PACKAGING

FOR

SHIPMENT

the

7934

shipped

for

long

distances

com-

tnercial

transportation,

recommended

that

the

instru-

ment

repackaged

the

original

manner.

The

carton

and

packaging

material

which

your

instrument

was

shipped

should

saved

and

used

for

this

purpose.

Also,

this

instrument

shipped

Tektronix

Service

Center

for

service

repair,

attach

tag

the

in-

strument

showing

the

following:

Owner

the

Instrument

(with

address),

name

person

your

firm

who

can

contacted

required,

complete

instrument

type

and

serial

number,

and

detailed

description

the

service

required.

the

original

packaging

unfit

for

use

not

available,

package

the

instrument

follows:

Obtain a

corrugated

cardboard

shipping

carton

having

inside

dimensions

least six

inches

greater

than

the

instru-

ment

dimensions.

Refer

Table

1-3

for

carton

test

strength

requirements.

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