Tektronix 321 A Manuale utente

INSTRUCTION

MAN

UAL

TYPE

321A

OSCILLOSCOPE

Tektronix,

Inc.

S.W.

Millikan

Way

Box

500

Beaverton,

Oregon

97005

Phone

644-0161

Cables:

Tektronix

070-425

564

mentioned

above

should

taken

your

Tektronix

Field

Engineer.

ktronix

repair

and

replacement-part

geared

directly

the

field,

there-

all

requests

for

repairs

and

replace-

parts

should

directed

the

Tek-

nix

Field

Office-or

Representative

your

This

procedure

will

assure

you

the

possible

service.

Please

include.

the

rument

Type

and

Serial

number

with

all

sts

for

parts

service.

ifications

and

price

change

priv-

reserved.

erton,

Oregon.

Printed

the

United

America.

All

rights

reserved.

tents

"any

form

may

not

re-

luced

any

form:

without

permission

owner.

INTeNsiTY

Focus

SCALE

Hive

ASTIGMATISM

——

HORIZONTAL

POSITION

VERTICAL

POSITION

POWER

VERTICAL

YARAne

TIME

AMPLIFIER

YOUS/OIV

THICKE

FULL

VAMIAgLE

Aes

row

SATTeRES

TYPE

321A

srABKITY!

Ctinoscore]

TRIGGERING

Lever

tiny

SLOPE

The

Type

321A

Oxcilloscope

Type

321A

Type

321A

SECTION

CHARACTERISTICS

Introduction

The

Tektronix

Type

321A

high-performance,

de-to-6

mc,

transistorized

oscilloscope.

Its

light

weight,

small

size

and

ability

operate

from

variety

power

sources

make

versatile

field

and

laboratory

instrument.

The

oscillo-

scope

can

operate

from

its

internally-contained

rechargeable

battery

pack,

external

source

from

115/230-volt

50-800

cycle

line.

Regulated

power

supplies

the instru-

ment,

accurate

calibration,

and

precise

linearity

assure

exact

time

and

amplitude

measurements

despite

normal

voltage-

source

and

power-supply-load

changes

that

occur

under

actual

operating

conditions.

Operating

temperature

range derived

from

tests

indicates

optimum

performance

and

reliability on

its

self-contained

batteries

from

0°

+40°

altitudes

15,000

feet.

Temperature

range

without

batteries

when

operating

from

external

source

—-15°

+55°

Non-operating

tem-

perature

range

—55°

+75°

without

batteries

and

—40°

+60°

with

batteries

altitudes

50,000

feet.

For

the

operator's

convenience,

front-panel

battery

light

indicates

when

the

internal

batteries

are

low.

external

operation

being

used

instead

the

batteries,

the

light

turns

the

external

voltage

source

drops

too

low

for

proper

power

supply

regulation.

4-position

power

switch

on the

front

panel

permits

convenient

selection

charging

rate

and/or

power

source.

Vertical

Deflection

System

Bandpass—Dc

least

(3-db

down)

using

cou-

pling;

using

coupling,

low-frequency

3-db

down

point

2cps

typical

from

1-ke

reference.

Sensitivity—0.01

v/div

20v/div

calibrated

steps;

accuracy

within

front-panel

markings.

Con-

tinuously

variable

from

0.01

v/div

bout

v/div

uncalibrated.

Input

Impedance—35

nominal

paralleled

megohm

{::1%),

8.2

nominal

paralleled

megohms

(22%)

when

using

the

P6006

10X

Probe.

Maximum

Allowable

Input

Voltage

Rating—600

volts

com-

bined

and

peak

ac;

600

volts

(not

1200

volts)

peak-to-

peak

ac.

Triggering

Type—Automatic,

amplitude-level

selection

using

pre-

set

stability,

Mode—Ac-coupled

De-coupled.

Slope—Plus,

from

rising

slope

triggering

waveform,

minus

from

negative

slope

triggering

waveform.

Source—Internal

from

vertical

signal,

external

from

triggering

signal.

Signal

Requirements—Internal:

0.2

major

division

vertical

deflection

increasing

major

division

me.

External:

volt

peak-to-peak

increasing

volts

peak-to-peak

6mc.

Nominal

input

impedance:

paralleled

100

kilohms

(-+-20%).

Sweep

Type—Miller

Integrator.

Sweep

Rates—0.5

ysec/div

0.5

sec/div

calibrated

steps.

Accurate

sweep

magnifier

extends

calibrated

range

to 0.)

ysec/div,

Calibrated

sweep-rate

accuracy

-+3%.

Sweep

time

adjustable

between

steps

and

21.5

sec/div

uncalibrated.

External

Horizontal

Input

Bandpass—Dc

to at

least

(3-db

down).

Deflection

Factor—I

v/dv

+10%

with

magnifier

on.

Input

Impedance—30

typical

paralleled

100

kilohms

{5%).

Amplitude

Calibrator

Square

Wave—Frequency

about

kc.

Amplitude—500

peak-to-peak.

Also

peak-to-

peak

internally

coupled

CAL

DIV

position

VOLTS/

DIV

switch.

Peak-to-peak

amplitude accuracy

+3%.

Cathode-Ray

Tube

Type—Special

Tektronix-manufactured

T3211,

3”

flat-face,

post-deflection

accelerator.

Low

heater

power.

Accelerating

Potential—4

kv.

Z-Axis

Modulation—External

terminal

permits

coupling

crt

grid.

Unblanking—Deflection

unblanking.

Phosphor—Type

P31

normally

furnished;

Pl, P2, P7,

and

P11

phosphors

optional.

Other

phosphors

furnished

special

order.

Graticule

Ilumination—Variable

edge

lighting

when

operating

from

line.

Display

Area—Marked

6-vertical

and

10-horizontal

1/4“

divisions.

Power

Requirements

Source—Operates

from

size

flashlight

cells,

size

rechargeable

cells

(approximately

hours

using

2.5

ampere-hour

cells;

approximately

hours

using

Characteristics

—-

Type

321A

ampere-hour

cells),

11.5

35 volts

(aircraft,

auto,

boat,

etc,),

103.5

126.5

volts

207

253

volts,

rms, 50

800

cycles,

single-phase

ac.

Power

Consumption—Approximately

700

from

internal

batteries

external

source;

watts

nominal

115-volt

fine.

Temperature

Protection—-Thermal

cutout

switch

interrupts

power

ambient

temperature

exceeds

131°

(55°

C).

Built-in

battery

charger

standard

equipment.

Environmental

Capabilities

Vibration

(operating)-—0.025"

peak-to-peak,

cps

minute

sweeps

G's)

for

minutes

each

axis.

Three-minute

vibration

resonance

cps

each

axis.

Shock

(operating}—20

G's,

sine,

11-msec

duration.

Two

shocks

each

direction

along

each

the

three

major

axis:

bottom,

top,

left

side,

right

side,

front

and

rear.

Total

shocks.

Shock

{non-operating)—60

G's,

¥%

sine,

11-msec

duro-

tion.

One

shock

each

direction

along

each

the

three

major

axis;

total

of 6

shocks.

Humidity

[non-operating)—Meets

Mil-Std-202B,

method

106A

(except

freezing

and

vibration)

through

cycles

(120

hours).

Transit

(non-operating)—Meets

National

Safe

Transit

test

when

factory

packaged.

Vibration

for

one

hour

slightly

greater

than

one

Eighteen-inch

drop

any

orientation,

Mechanical

Specifications

Construction—Aluminum

alloy

chassis

and

cabinet.

Finish—Anodized

panel,

blue

vinyl-finish

cabinet.

Dimensions—8'/,"

high,

5%,”

wide,

16”

deep

overall.

ACCESSORIES

Information

accessories

for

use

with

this

instrument

included

the

rear

the

mechanical

parts

list.

SECTION

PRELIMINARY

INSTRUCTIONS

Power

Requirements

The

regulated

power

supplies

the

Type

321A

will

operate

form

115-v

230-v

rms

line,

from

external

source

(11.5

volts),

from

“battery

pack”

consisting

either

size

flashlight

cells or

size

rechargeable

cells.

Fuse

Data

Use

only

the

recommended

fuses

the

Type

321A

Oscil-

loscope. The

upper

fuse,

F621

(see

Fig.

2-1),

1.5-amp

3AG

Fast-Blo;

the

lower

fuse,

F601,

.25-amp

3AG

Fast-

Blo.

Neither

fuse

needs

changed

the

oscilloscope

converted

from

one

line

voltage

the

other

(I115v

and

230

v).

volt

operation,

these

connections

not

have

changed

when

converting

from

one

line

voltage

the

other.

When

wired

for

115-volt

operation,

terminals

and

are

joined

bare

bus

wire,

and

terminals

and

are

simi-

larly

joined,

shown

Fig.

2-2[a).

convert

230-

volt

operation,

remove

the

bare

bus

wires

between

these

terminals

and

substitute

single

connecting

wire

between

terminals

and

shown

Fig.

2-2(b).

turn

the

Type

321A

when

the

power

cord

con-

nected

the

oscilloscope

power

connector

and

the ac

voltage

source,

set

the

POWER

switch

EXT

ON.

turn

off

the

oscilloscope,

set

the

POWER

switch

TRICKLE.

The

TRICKLE

position

can

regarded

the

normal

“off”

posi-

tion

for

the

instrument.

Fig.

2-1.

Location

fuses

and

Charger

switch

(left-side

view).

Operation

Unless

tagged

otherwise,

your

instrument

connected

the

factory

for

operation

103.5

126.5

volts,

800

cycles

(115

volts

nominal),

However,

provisions

are

made

for

easy

conversion

operate

207

253

volts,

800

cycles

(230

volts

nominal).

The

power

transformer

T601

provided

with

split

input

windings

which

are

normally

connected

parallel

for

115-volt

operation,

but

which

can

connected

series

for

230-volt

operation.

The

primary

windings

are

marked

1, 2,

and

Terminals

and

are

connected

one

winding

and

terminals

and

are

connected

the

second

winding.

The

input

leads

are

connected

terminals

and

for

both

115-volt

and

230-

115-v

230-v

Fig.

2-2.

(al

Transformer

connection

for

operation

from

103.5~

126.5

volt

line;

(b)

connections

for

operation

from

207-253

volt

ae line.

long

the

power

cord

connected

the

line,

power

being

applied

the

power

transformer

T601,

ac-

rectifier

circuit,

and

graticule

lights

for

all

positions

the

POWER

switch.

Application

power

these

circuit

re-

quired

provide

battery-charger

operation

for

the

internal

batteries;

the

graticule

lights

provide

visual

indication

that

these

circuits

are

“on”.

Power

the

battery

charger

itself

controlled

Charger

switch

(see

Fig.

2-1).

the

switch

2-1

Preliminary

Instructions

—

Type

321A

set

LOW

HIGH,

the

rectifier

connected

the

battery

charger

circuit

which,

turn,

provides

charging

cur-

rent

the

internal

rechargeable

batteries.

NOTE

dry

cells

are

used

instead

rechargeable

bat-

teries,

then

the

Charger

switch

must

set

DRY

CELLS

disconnect

the

charger

circuit.

For

further

information

about

battery

operation,

refer

the

topics

titled

“Battery

Operation”

and

‘'Battery

Charger"

appearing

this

section

the

manual.

the

Type

321A

being

operated

exclusively

from

the

line

and

the

internal

batteries

are

removed,

the

Charger

switch

can

remain

the

DRY

CELLS

position

disconnect

the

charger

circuit.

you

prefer

completely

turn

off

all

power

the

Type

321A,

set

the

POWER

switch

TRICKLE

and

either

disconnect

the

power

cord from

the

line

turn

off

the

power

wall

switch

(or

equiv-

alent}.

Battery

Operation

from

the

internal

battery source

can

accom-

plished

using:

Ten

size

flashlight

cells

(approximately

'/,-hour

con-

tinuous

operation,

with

intermittent

operation),

Ten

size

Alkaline

cells

such

Eveready

E95,

Burgess

AL-2,

Mallory

MN-1300

(about

2'/;

hours

continuous

operation),

Ten

size

nickel-cadmium

rechargeable

cells

(up

about

hours

continuous

operation,

depending

the

type

used).

The

nickel-cadmium

cells

are

the

most

practical

type

where

considerable

battery

operation

planned.

install

the

cells,

first

open

the

battery

cover

illus-

trated

Fig,

2-3,

Next,

install

the

batteries

following

the

procedure

given

Fig.

2-4.

CAUTION

sure

observe

cell

polarity

indicated

the

battery

cover.

turn

the

Type

321A when

operating

from

the

internal

batteries,

set

the

POWER

switch

BATT

ON.

turn

off

the

oscilloscope,

set

the

POWER

switch

one

the

OFF

posi-

tions—FULL

TRICKLE.

These

OFF

positions

disconnect

the

batteries

from

the

oscilloscope

load

{10-volt

regulated

supply)

there

battery

drain.

charge

the

recharge-

able

batteries,

refer

the

topic

titled

“Battery

Charger”.

Loosen

thumb

screw

unlock

cover,

then

pull

cover

forward

remove.

Fig.

2-3.

Removing

the

battery cover

from

the

Type

321A

Oscilloscope.

Preliminary

Instructions

—

Type

321A

‘of

the

battery

Medak

sure

observe

cell

polarity

as.

in-

dicated

the.

cover.

Fig.

2-4,

Procedure

for

installing

the

batteries.

Battery

Charger

mentioned

previously,

the

battery

charger

connected

the

internal

batteries

long

the

power

cord

connected

power

source

and

the

Charger

switch

{see

Fig.

2-1)

set

HIGH

LOW.

charging

occurs

the

Charger

switch

set to

DRY

CELLS.

Table

2-1

summarizes

the

charging

currents

that

can

obtained

using

various

line

voltages

combination

with

various

settings

the

POWER

and

Charger

switches.

The

table

shows

the

Type

321A

wired

for

115-volt

nominal

line

operation,

the

oscilloscope

wired

for

230-volt

nominal

line

operation,

the

charging

currents

will

still

the

same

but

the

line

voltages

will

twice

the

amount

shown

the

table.

Use

Table

2-1

aid

determining

the

proper

posi-

tion

for

the

POWER

and

Charger

switches

for

the

particular

brand

type

rechargeable

batteries

being

used

the

Type

321A.

After

setting

the

switches

their

proper

posi-

tion,

the

line

voltage

can

then

set

the

charging

rate

recommended

the

manufacturer

the

cells.

auto-

transformer

having

rating

least

ampere

and

equipped

with

rms-reading

voltmeter

can

used

set

the

line

voltage.

When

using

rechargeable

batteries,

sixteen

hours

charging

the

full

rated

charging

current

recommended

the

manufacturers

should

adequate

fully

charge

the

batteries.

Excess

charging

may

damage

the

batteries,

One

methed

for

determining

charge

conditions

the bat-

teries

set

the

POWER

switch

BATT

and

then

measure

the

voltage

across

the

battery

terminals

(see

Fig,

2-4).

reading

higher

than

volts

indicates

that

the

batteries

are

fully

charged.

reading

lower

than

volts

indicates

that

charging

time

required.

mentioned

previously,

dry

cells

are installed

the

battery

holder

and

the

Type

321A

being

operated

from

the

line,

the

Charger

switch

must

set

the

DRY

CELLS

position,

This

position

disconnects

the

charging

circuit

from

the

batteries.

TABLE

2-1

Charging

Currents

POWER*|

Charger

Aproximate

Charging

Switch

Current

Position

103.5

109

115

v 121

v/126.5v

Ton

|_tOW

20.

EXT

|—

eennlan

HIGH

229630

[33

TRICKLE

Low

HIGH

3437

aaa

Low

|”

166

180

200220330”

HIGH

|""290_|

320

360

380” “aio

"The

BATT

position

not

included

the

table

because

the

Type

321A

should

not

operated

from

the

line

and

the

batteries

the

same

time,

Reoson:

Battery

drain

exceeds

charg-

ing

rote.

2-3

Preliminary

Instructions

—

Type

321A

Operation

from

external

source

acomplished

connecting

the

special

pigtail-type

power

cord

the

proper

manner.

For 11.5-

20-volt

operation,

the

black

(+]

and

white

(—)

leads

are

connected

the

voltage

source;

for

20-

35-volt

operation,

the

green

(+)

and

white

{--)

leads

are

connected

the

voltage

source.

When

the

connections

the

external

voltage

source

are

properly

made,

the

external

source

floating

with

respect

the

Type

321A

chassis.

600

volts

difference

permissi-

ble,

necessary.

To turn

the

Type

321A,

set

the

POWER

switch

EXT

ON.

turn

off

the

oscilloscope,

set

the

POWER

switch

‘one

the

OFF

positions—TRICKLE

FULL.

When

operating

from

the

external

source,

the ac

line

cord

should

disconnected,

That

is,

only

one

the

exter-

nal

sources

should

used

rather

than both

the

same

time.

2-4

NOTE

The

internal

battery

charger

circuit

disconnected

during

external

operation.

Therefore,

external

batteries

(if

used

the

source)

cannot

charged

connecting

the

line

cord

the

line.

Also,

external

source

cannot

used

charge

the

internal

batteries

since

the

POWER

switch

does

not

electrically

connect

the

two

sources

together.

LOW

BATTERIES

Light

The

LOW

BATTERIES

light

turns on

when

the

following

conditions

exist:

The

POWER

switch

set

BATT

and

the

internal

batteries

drop

11.5

(0.2

lower.

The

POWER

switch

set

EXT

and

the

external

source

voltage

low

enough

cause

the

Type

321A

un-

regulated

voltage

drop

about

11.5v

lower.

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