Tektronix 7704A User manual

INSTRUCTION

MIAN

UAL

Tektronix,

Inc.

070-1402-00

P.O.

Box

500

Serial

Number

Beaverton,

Oregon

97005

-®

Phone:

644-0161

Cables:

Tektronix

672

‘e

you

ease

include

the

instrument

Number

Part

972

Tektronix,

Inc.,

Beaverto

Oregon.

the

United

States

America.

All

rights

reserved.

Tektronix

COMMITTED

EXCELLENCE

WARRANTY

NOTICE

THIS

WARRANTY

SUPERSEDES

ANY

OTHER

WARRANTY

PUBLISHED

FOR

THIS

PRODUCT

PRIOR

JANUARY

1980.

WARRANTY

Tektronix

warrants

that

this

product

free

from

defects

materials

and

workmanship.

The

warranty

period

one

(1)

year

from

the

date

shipment.

Tektronix

will,

its

option,

repair

replace

the

product

Tektronix

determines

defective

within

the

warranty

period

and

returned,

freight

prepaid,

service

center

designated

Tektronix.

Tektronix

not

obligated

furnish

service

under

this

warranty

repair

damage

resulting

from

attempts

personnel

other

than

Tektronix

representatives

install,

repair,

service

the

product;

repair

damage

resulting

from

improper

use

from

connecting

the

product

incompatible

equipment;

personnel

other

than

Tektronix

representatives

modify

the

hardware

software.

There

implied

warranty

fitness

for

particular

purpose.

Tektronix

not

liable

for

consequential

damages.

Warranty

SECTION

7704A

Operators

TABLE

CONTENTS

OPERATING

INSTRUCTIONS

Preliminary

Information

Operating

Voltage

Operating

Temperature

Plug-In Units

Installation

Interchanging

Plug-ins

Controls

and

Connectors

Front-Panel

Color

Coding

Location

(Fig.

1-2A

Operating

Checkout

(and

Familiarization)

Simplified

Operating

Instructions

Single-Trace

Displays

Dual-Trace

Dual-Sweep

Displays

Delayed

Sweep

Displays

X-Y

Displays

Detailed

Operating

Information

Intensity

—F

ocus—Astigmatism

Controls

BEAM

FINDER

Switch

CONTROL

ILLUM

Switch

Trace

Alignment

Graticule,

Light

Filter

Readout

System

Vertical

and

Horizontal

Mode

Logic

VERTICAL

MODE

Switch

HORIZONTAL

MODE

Switch

Vertical

Trace

Separation

TRIGGER

SOURCE

Switches

Intensity

Modulation

(Z-Axis)

CALIBRATOR

Output

Signal

Outputs

Probe

Power

Page

1-1

1-2

1-3,

1-4

1-8

1-9

1-9,

1-10

1-11

1-12

1-13

1-14

1-15

1-16

1-17

SECTION

OPERATING

INSTRUCTIONS

(cont)

Remote

Single-Sweep

Reset

Display

Photography

Applications

(Plug-In

Combinations)

Vertical

Amplifier

Plug-Ins

Time-Base

Plug-Ins

X-Y

Operation

Raster

Displays

Sampling

Displays

Special-Purpose

Plug-Ins

SECTION

SPECIFICATIONS

Electrical

Performance

Requirements

(7704A

Only)

Vertical

Deflection

System

Triggering

Horizontal

Deflection

System

Calibrator

Character

Readout

(Optional)

Signal

Buffer

(Optional)

Vertical

Signal

Output

Z-Axis

Input

Sawtooth

Output

Gate

Output

Remote

Reset

Input

(Single-Sweep)

Cathode

Ray

Tube

(CRT)

Power

Supply

Environmental

Characteristics

Physical

Characteristics

Instrument

Options

Standard

Accessories

System

Electrical

Characteristics

Page

1-17

1-18

1-19

2-1

2-2

2-3

2-4

nese?

SRT

7704A

Oscilloscope

System.

INTRODUCTION

The

TEKTRONIX

7704A

Oscilloscope

System

solid-state,

high

performance

instrument

designed

for

gen-

eral

applications.

(For

rise

time

and

bandwidth

specifica-

tions

oscilloscope

systems

using

the

7704A,

see

page

2-5.)

The

system

composed

two

individual

units,

the

A7704

Acquisition

Unit

and

the

D7704

Display

Unit.

The

A7704

Acquisition

Unit

has

four

plug-in

compart-

ments.

The

left

pair

plug-in

units

connected

the

vertical

system;

the

right

pair

connected

the

horizontal

system.

Electronic

switching

between

the

plug-ins

con-

nected

each

system

allows

dual-trace

vertical

display

and/or

dual-sweep

horizontal

display.

7704A

Operators

The

D7704

Display

Unit

features

CRT

with

small

spot

size

and

high

writing

rate.

addition

the

waveform,

the

CRT

can

also

display

alpha-numeric

information

from

the

plug-in

units,

such

deflection

factor,

sweep

rate

and

other

encoded

parameters.

Standard

graticule

size

cm.

supplies

the

Acquisition

Unit

supply

power

for

the

entire

instrument.

These

supplies

are

regulated

assure

that

performance

not

affected

variations

line

voltage

and

frequency,

changes

load

due

the

varying

power

requirements

the

plug-in

units.

Section

1—7704A

Operators

OPERATING

INSTRUCTIONS

General

effectively

use

this

instrument,

the

operation

and

capabilities

the

instrument

must

known.

This

section

describes

the

operation

the

front-

and

rear-panel

controls

and

connectors

and

gives

general

operating

information.

PRELIMINARY

INFORMATION

Operating

Voltage

The

7704A

can

operated

from

either

115-volt

230-volt

nominal

line

voltage

source.

The

Line

Selector

assembly

the

rear

panel

converts

this

instrument

from

one

operating

voltage

the

other.

This

assembly

also

includes

line

fuses.

Use

the

following

procedure

obtain

correct

instrument

operation

from

the

line

voltage

available.

OLLI

IOS

CAUTION

This

instrument

designed

for

operation

from

power

source

with

its

neutral

at or

near

earth

(ground)

potential

with

separate

safety-earth

con-

ductor.

not

intended

for

operation

from

two

phases

multi-phase

system,

across

the

legs

single-phase,

three-wire

system.

Disconnect

the

instrument

from

the

power

source.

Loosen

the

two

captive

screws

which

hold

the

cover

onto

the

selector

assembly;

then

pull

remove

the

cover.

convert

from

115-volts

230-volts

nominal

line

voltage,

vice

versa,

pull

out

the

Selector

switch

bar

(see

Fig. 1-1)

and

plug

back

into

the

remaining

hole.

Change

the

line-cord

power

plug

match

the

power-source

receptacle

use

115-

230-volt

adapter.

Power

Cord

Conductor

Identification

Conductor

Color

Alternate

Color

Ungrounded

(Line)

Brown

Black

Grounded

(Neutral) Blue

White

Grounding

(Earthing)

|Green-Yellow

Green-Yellow

REV...

NOV...

1976

Indicator

Tab

Captive

Screws

Selector

Switch

bar

Fig.

1-1.

Line

Selector

assembly

rear

panel

(shown

with

cover

and

fuses

removed).

Re-install

the

cover

and

tighten

the

captive

screws.

Before

applying

power

the

instrument,

check

that

the

indicator

tab

on the

switch

bar

protruding

through

the

correct

hole

for

the

desired

line

voltage

range.

WII

TTI

TIS)

UTION

This

instrument

may

damaged

operated

with

the

Line

Selector

assembly

set

incorrect

positions

for

the

line

voltage

applied.

The

7704A

designed

used

with

three-wire

power

system.

the

three-

two-wire

adapter

used

connect

this

instrument

two-wire

AC power

system,

sure

connect

the

ground

lead

the

adapter

earth

(ground).

Failure

complete

the

ground

system

may

allow

the

chassis

this

instrument

elevated

above

ground

potential

and

pose

shock

hazard.

1-1

Operating

Instructions—7704A

Operators

Operating

Temperature

The

7704A

can

operated

where

the

ambient

air

temperature

between

O°C

and

+50°C.

This

instrument

can

stored

ambient

temperatures

between

—55°C

and

+75°C.

After

storage

temperatures

beyond

the

operating

limits,

allow

the

chassis

temperature

come

within

the

operating

limits

before

power

applied.

The

7704A

cooled

convection

air

flow

through

the

instrument.

Adequate

clearance

must

provided

all

sides

allow

heat

dissipate.

not

block

restrict

the

air

flow

through

the

holes

the

cabinet.

Maintain

the

clearance

provided

the

feet

and

allow

about

two

inches

clearance

the

top,

sides

and

rear

(more

possible).

Operating

Position

bail-type

stand

mounted

the

bottom

the

instrument

permits

the

7704A

tilted

about

10°

for

convenient

viewing.

PLUG-IN

UNITS

General

The

7704A

accepts

four

TEKTRONIX

7-series

plug-in

units.

This

plug-in

feature

allows

variety

display

combinations

and

also

allows

selection

bandwidth,

sensitivity,

display

mode,

etc.

meet

the

measurement

requirements.

addition,

allows

the

oscilloscope

system

expanded

meet

future

measurement

requirements.

The

overall

capabilities

the

system

are

determined

the

characteristics

the

plug-ins selected.

Some

typical

combinations

are

given

under

““Applications’”

page

1-18.

along

with

simplified

instructions

for

setting

them

up.

For

information

other

plug-ins,

see

the

current

Tektronix,

Inc.

catalog.

Installation

Plug-In

Units

CAUTION

Plug-in

units

should

not

installed

removed

without

first

turning

the

instrument

power

off,

prevent

instrument

damage.

install

plug-in

unit

into

plug-in

compartment,

align

the

slots

the

top

and

bottom

the

plug-in

with

the

associated

guide

rails

the

plug-in

compartment.

Push

the

plug-in

unit

firmly

into

the

plug-in

compartment

until

locks

into

place.

remove

plug-in,

pull

the

release

latch

the

plug-in

unit

disengage

and

pull

the

unit

out

the

compartment.

1-2

All

the

plug-in

compartments

not

need

filled

operate

the

instrument;

the

only

plug-ins

needed

are

those

required

for

the

measurement

made.

environ-

mental

extremes,

excess

interference

may

radiated

into

the

instrument

through

the

open

plug-in

compartments.

Blank

plug-in

panels

are

available

from

Tektronix,

Inc.

cover

the

unused

compartments;

order

TEKTRONIX

Part

No.

016-0155-00.

Interchanging

Plug-ins

When

the

instrument

calibrated

directed

the

Service

Manual’s

Calibration

procedure,

the

vertical

and

horizontal

gains

are

normalized,

allowing

calibrated

plug-in

units

interchanged

from

one

compartment

another

without

recalibration.

However,

the

basic

calibration

the

individual

plug-in

units

should

checked

when

they

are

installed

this

system

verify

their

measurement

accuracy.

See

the

operating

instructions

section

the

plug-in

unit

instruction

manuals

for

verification

procedure.

CONTROLS

AND

CONNECTORS

The

major

controls

and

connectors

are

located

the

front

panel

the

instrument.

Several

auxiliary

functions

are

provided

the

rear

panel.

Figure

1-2

shows

the

front

and

rear

panels

and

provides

brief

descriptions

each

control

and

connector.

detailed

operating

information

given

under

‘Detailed

Operating

Information’

starting

page

1-9.

Front-Panel

Color

Coding

Portions

the

front-panel

the

7704A

and

its

plug-in

units

are

color-coded

follows

aid

operating

the

instrument:

RED

Identifies

the

nomenclature

and

controls

that

will

uncalibrate

the

instrument.

BLUE

Identifies

the

controls

affecting

the

CRT

display

mode.

GREEN

Identifies

all

trigger

controls.

Other

colors

such

gray,

orange,

yellow,

etc.

have

functional

assignments,

but

are

used

needed

indicate

the

relationship

between

the

appropriate

controls

and

connectors.

REV.

NOV.

1977

Operating

Instructions—7704A

Operators

ASTIG

Screwdriver

adjust-

ment

obtain

well-defined

display.

Does

not

require

re-

adjustment

normal

use.

BEAM

FINDER

Compresses

and

defocuses

display

within

graticule

area

regardless

dis-

play

position

applied

signal.

TRACE

ROTATION

Screw-

driver

adjustment

align

trace

with

graticule.

FOCUS

Adjustment

for

opti-

mum

display

sharpness.

CALIBRATOR

Provides

cali-

brated

40mV-4V,

1kHz

square-wave

signals.

POWER

(PULL)

VERTICAL

MODE

Selects

i -

/r¥0a

AOUUISTION

UST

vertical

plug-in

compart-

‘4

rica

ment(s)

providing

the

vertical

deflection

signal.

VERT

TRACE

SEPARATION

(B)

Vertically

positions

the

HORIZ

trace

with

respect

the

HORIZ

trace

(dual-

sweep

modes

only)

INTEN

Controls

brightness

the

trace

produced

the

HORIZ

plug-in.

TRIGGER

SOURCE

Selects

internal

trigger

source

for A

HORIZ

time

base.

INTENSITY

Controls

bright-

ness

the

display

(except

the

readout

portion).

READOUT

Controls

bright-

ness

the

readout

portion

the

CRT

display.

Turns

off

the

readout

system

when

the

CCW

detent

position.

GRAT

ILLUM

Controls

grati-

cule

illumination.

TRIGGER

SOURCE

Selects

internal

trigger

source

for

HORIZ

time

base.

INTEN

Controls

brightness

the

trace

produced

the

HORIZ

plug-in.

HORIZONTAL

MODE

Selects

horizontal

plug-in

compart-

ment(s)

providing

the

hori-

zontal

deflection

signal.

Fig.

1-2A.

Front-panel

controls

and

connectors.

1-3

Operating

Instructions—7704A

Operators

AXIS

INPUT

Input

for

Z-

Axis

circuit

providing

inten-

sity

modulation

the

CRT.

VERT

SIG

Sample

vertical

signal

selected

TRIG-

GER

SOURCE

switch.

SAW

TOOTH

Sample

Sawtooth

selected

internal

switch.

GATE

Square-wave

signal

selected

internal

switch:

Gate;

Dely’d

Gate.

CONTROL

ILLUM

Controls

illumination

push-button

switches.

PROBE

POWER

Connectors

supplying

power

one

two

active

probes.

REMOTE

RESET

INPUT

Pro-

Line

Selector

Assembiy

Se-

vides

remote

single-sweep

reset

lects

the

nominal

line

voltage

when

Time

base

Single

(115

230

VAC).

Sweep

Mode.

Fig.

1-2B.

Rear-panel

controls

and

connectors.

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