Tektronix 475A Manual de usuario

SĘ:

„i

Eo,

Tektronix,

inc.

P.O.

Box

500

WARRANTY

All

TEKTRONIX

instruments

are

warranted

against

defective

materials

and

workmanship

for

one

year.

Any

questions

with

respect

the

warranty

should

taken

with

your

TEKTRONIX

Field

Engineer

representative.

All

requests

for

repairs

and

replacement

parts

should

directed

the

TEKTRONIX

Field

Office

representative

your

area.

This

will

assure

you

the

fastest

possible

service.

Please

include

the

instrument

Type

Number

Part

Number

and

Serial

Number

with

all

requests

for

parts

service.

Specifications

and

price

change

privileges

reserved.

1976

Tektronix,

Inc.,

Beaverton,

Oregon.

Printed

the

United

States

America.

All

rights

reserved.

Contents

this

publication

may

not

reproduced

any

form

without

permission

Tektronix,

Inc.

U.S.A.

and

foreign

Tektronix

products

covered

U.S.

and

foreign

patents

and/or

patents

pending.

TEKTRONIX

registered

trademark

Tektronix,

inc.

TABLE

CONTENTS

Page

LIST

ILLUSTRATIONS

BASIC

OSCILLOSCOPE

DISPLAYS

NORMAL

SWEEP

DISPLAY

MAGNIFIED

SWEEP

DISPLAY

BEFORE

OPERATING

DELAYED

SWEEP

DISPLAY

INTRODUCTION

MIXED

SWEEP

DISPLAY

SAFETY

INFORMATION

Dee

ene

OPERATING

VOLTAGE

SINGLE

SWEEP

DISPLAY

Line

Voltage

Selection

Regulating

Range

Selection

DM44

DISPLAYS

AND

MEASUREMENTS

OPTIONS

RESISTANCE

CONTROLS,

CONNECTORS,

AND

VOLTS

INDICATORS

TEMPERATURE

VERTICAL

Accuracy

Check

DISPLAY

TIME

AND

1/TIME

DM44

TRIGGER

HORIZONTAL,

CALIBRATOR,

AND

POWER

APPLICATIONS

AND

MEASUREMENTS

REAR

PANEL

PRELIMINARY

LEFT

SIDE

PANEL

Signal

Ground

RIGHT

SIDE

PANEL

input

Coupling

Capacitor

Precharging

475A/DM44

Operators

Page

APPLICATIONS

AND

MEASUREMENTS

(cont)

TABLE

CONTENTS

(cont)

Page

OPERATOR’S

ADJUSTMENTS

AND

CHECKS

Trace

Rotation

Probe

Compensation

Vertical

Gain

Check

Basic

475A

Timing

Check

DM44

Timing

Check

External

Horizontal

Gain

Check

PEAK-TO-PEAK

VOLTAGE

MEASUREMENTS—AC

INSTANTANEOUS

VOLTAGE

MEASUREMENTS—DC

ALGEBRAIC

ADDITION

COMMON

MODE

REJECTION

AMPLITUDE

COMPARISON

MEASUREMENTS

TIME-DURATION

MEASUREMENTS

FREQUENCV

MEASUREMENTS

RISETIME

MEASUREMENTS

TIME

DIFFERENCE

BETWEEN

TWO

PULSES

FROM

DIFFERENT

SOURCES

TIME

COMPARISON

MEASUREMENTS

475A/DM44

Operators

APPLICATIONS

AND

MEASUREMENTS

(cont)

PHASE

DIFFERENCE

MEASUREMENTS

HIGH

RESOLUTION

PHASE

DIFFERENCE

MEASUREMENTS

PULSE

JITTER

MEASUREMENTS

DELAYED

MIXED

SWEEP

MAGNIFICATION

Magnified

Sweep

Starts

After

Delay

Triggered

Delay

Sweep

Magnification

Page

BASIC

475A

DELAYED

MIXED

SWEEP

TIME

MEASUREMENTS

TIME

DIFFERENCE

BETWEEN

REPETITIVE

PULSES

(BASIC

475A)

TIME

DURATION

MEASUREMENTS

(BASIC

475A)

FREQUENCY

MEASUREMENTS

(BASIC

475A)

TIME

DIFFERENCE

BETWEEN

TWO

PULSES

FROM

DIFFERENT

SOURCES

(BASIC

475A)

RISETIME

(BASIC

475;

MIX

{BASIC

475A)

TABLE

CONTENTS

(cont)

DM44

DELAYED

MIXED

SWEEP

TIME

MEASUREMENTS

Page

TIME

DIFFERENCE

BETWEEN

REPETITIVE

PULSES

(DM44)

TIME

DURATION

MEASUREMENTS

(DM44)

FREQUENCY

MEASUREMENTS

(DM44)

TIME

DIFFERENCE

BETWEEN

TWO

PULSES

FROM

DIFFERENT

SOURCES

(DM44)

RISETIME

(DM44)

MIX

(DM44)

OPERATOR'S

SPECIFICATIONS

475A

OSCILLOSCOPE

VERTICAL

TRIGGERING

DIFFERENTIAL

TIME

MEASUREMENT

(BASIC

475A)

DIFFERENTIAL

TIME

MEASUREMENT

(DM44)

HORIZONTAL

X-Y

CALIBRATOR

64.

OPERATOR'S

SPECIFICATIONS

(cont)

AXIS

INPUT

OUTPUTS

POWER

SOURCE

ENVIRONMENTAL

DM44

DIGITAL

MULTIMETER

RESISTANCE

TIME

1/TIME

TEMPERATURE

VOLTAGE

ACCESSORIES

STANDARD

ACCESSORIES

OPTIONAL

ACCESSORIES

OPTIONS

OPTION

475A/DM44

Operators

Page

Fig.

10,

11.

12.

13.

14,

15.

16.

LIST

ILLUSTRATIONS

Regulating

range

selector

and

line

fuse.

Vertical

controls,

connectors,

and

indicators.

Display

and

DM44

controls,

connectors,

and

indicators.

Trigger

controls,

connectors,

and

indicators.

Trigger

controls,

connectors,

and

indicators.

Horizontal,

calibrator,

and

power

controis,

connectors,

and

indicators.

Rear

pane!

and

left

side

panei

controls,

connectors,

and

indicators.

Resistance.

Volts.

Temperature.

Probe

compensation.

Basic

475A

timing

check.

DMAA

timing

check.

Peak-to-peak

voltage

waveform.

Instantaneous

voltage

measurements.

Algebraic

addition.

Page

Fig.

17.

18.

19.

20.

21.

22.

23.

24.

25.

26.

27.

28.

29.

30.

31.

32,

475A/DM44

Operators

Common-mode

rejection.

Time

duration.

Risetime.

Time

difference

between

two

pulses

from

different

sources.

Phase

difference.

High-resolution

phase

difference.

Pulse

jitter.

Delaved

sweep

magnification.

Time

difference

between

tepetitive

pulses.

Time

duration.

Time

difference

between

two

pulses

from

different

sources.

Risetime.

Time

difference

between

repetitive

pulses.

Time

duration

and

frequency

measurements,

Time

difference

between

two

pulses

from

different

sources.

Risetime.

Page

kol

LIST

TABLES

Page

TABLE

Regulating

Ranges

TABLE

Centigrade

Fahrenheit

Conversion

TABLE

Resistance

Ranges

TABLE

DM44

Delayed

Sweep

Displays

TABLE

Volts

Ranges

475A/DM44

Operators

475A

Oscilloscope

with

DM44

Digital

Multimeter.

475A/DM44

Operators

2163-02

BEFORE

OPERATING

INTRODUCTION

The

Tektronix

475A

Oscilloscope

dual-channel

portable

instrument.

The

dual-channel

dc-to-250

MHz

vertical

system

provides

calibrated

deflection

factors

from

miltivolts

volts/division.

The

sweep

trigger

circuits

are

capable

stable

triggering

over

the

full

bandwidth

capabilities

the

vertical

deflection

system.

The

horizon-

tal

deflection

system

provides

calibrated

sweep

rates

from

0.5

second

0.01

microsecond/division

along

with

delayed

sweep

features

for

accurate

relative-time

measurements.

X10

magnifier

extends

the

calibrated

sweep

rate

nanosecond/division.

The

instrument

operates

over

wide

variation

line

voltages

and

frequencies.

Maximum

power

consumption

about

100

watts.

The

Tektronix

DM44

Digital

Multimeter

measures

ohm

megohms,

volt

1200

volts

—),

(using

the

temperature

probe)

~55°C

+150°C.

The

measurement

displayed

3-1/2

digital

display

while

the

oscilloscope

operates

normally.

The

digital

multimeter

and

oscilloscope

combine

provide

digital

readout

the

time

between

any

two

points

the

oscilloscope

display.

Both

time

measure-

ment

points

are

displayed

the

crt

the

same

time.

The

1/TIME

function

can

provide

direct

measurement

frequency.

SAFETY

INFORMATION

The

instrument

designed

operate

from

single-

phase

power

source

with

one

the

current-carrying

conductors

(the

Neutral

Conductor)

ground

(earth)

potential.

Operation

from

power

sources

where

both

current-carrying

conductors

are

live

with

respect

ground

(such

phase-to-phase

three-wire

system)

not

recommended,

since

only

the

Line

Conductor

has

over-current

(fuse}

protection

within

the

instrument.

The

instrument

has

three-wire

power

cord

with

three-terminal

polarized

plug

for

connection

the

power

source

and

safety-earth.

The

ground

(earth)

terminal

the

plug

directly

connected

the

instrument

frame.

For

electric-shock

protection,

insert

this

plug

only

mating

outlet

with

safety-earth

contact.

475A/DM44

Operators

OPERATING

VOLTAGE

CAUTION

ANA

ol MO

MM?

This

instrument

may

damaged

operated

with

the

line

voltage

selector

switch

the

regulating

range

selector

set

for

the

wrong

applied

line

voltage

the

wrong

line

fuse

used.

Line

Voltage

Selection

This

instrument

operates

from

either

115-volt

230-vott

nominal

line

voltage

source,

440

hertz.

convert

from

one

nominal

line

voltage

range

the

other,

move

the

Line

Voltage

Selector

switch

(located

side

panel)

indicate

the

correct

nominal

voltage.

115-to-

230

volt

adapter

may

required

for

the

line-cord

plug.

sure

use

the

correct

line

fuse

for

the

line

voltage

selected

(see

Table

1).

Regulating

Range

Selection

Tne

Regulating

Range

Selector

assembly

(located

the

rear

panel}

set

for

one

the

line

voltage

ranges

shown

Table

also

contains

the

line

fuse

for

overload

protection.

change

the

regulating

range:

Disconnect

the

instrument

from

the

power

source.

Loosen

the

two

captive

screws

that

hold

the

cover

the

selector

assembly;

then

puil

remove

the

cover.

Pull

out

the

range

selector

switch

bar

(see

Fig.

1).

Select

range

from

Table

which

centered

about

the

average

line

voltage.

Slide the

bar

the

desired

position

and

plug

in.

Push

the

cover

and

tighten

the

screws.

TABLE

Regulating

Ranges

Regulating

Range

115-Volis

230-Volts

Nominal

Range

Selector

Switch

Position

lower

holes)

(Switch

bar

middle

holes)

(Switch

bar

upper

holes)

Fuse

Size

_99

121

volts

198

242

volts

104

126

volts

207

253

volts

216

264

volts

0.75

3AG

108

132

volts

1,5

JAG

475A/DM44

Operators

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