Tektronix 211 User manual

TEKTRONIX@

211

. OSCILLOSCOPE

OPERATORS

MANUAL

Tektronix,

Inc.,

Beaverton, Oregon. Printed

the

Unit

States

America.

All

rights reserved.

Contents

this

public

ion may n

be r

eproduced

any form

without

permission

the

copy

right owner.

U.S.A. and foreign

Tektronix

product

s covered

U.S. and foreign

pat

and/or

pat

ents

pending.

Tektronix,

P.O

. Box

500

Beaverton, Oregon

97005

070

116

3-00 971

TABLE

CONTENTS

Introduction

General

Operating Voltage

Internal Battery Operation

Operation

Battery Charging

Operating

Temperature

Controls And Connectors

General

Operator's Adjustments

General

Vertical Gain

Step

Attenuator

Balance

Horizontal Gain

Horizontal Timing

Focus

Auto

Preset

211-0perators

Page

CONTENTS

(cont)

General Operating Information

Intensity Control

Graticule

Deflection

Factor

Signal Connections

Ground

Considerations

Input

Coupling

Trigger Source

Trigger Coupling

Trigger Slope

Trigger Level

Horizontal Sweep Rate

External Horizontal Operation

Applications

General

Peak-To-Peak Voltage

Measurements-AC

Voltage Measurements

Time-Duration Measurements

Determining Frequency

Risetime Measurements

211-

0perators

Manual

Page

211

OSCILLOSCOPE

INTRODUCTION

General

The

211 Oscilloscope

a single-channel,

500

kilohertz

portable

instrument

using

only

solid state and integrated

circuit

components

(except

CRT)

The

small size

the 211

makes

extremely

portable

oscilloscope

for

on-location

maintenance in

many

fields

application.

The

instrument

mechanically

constructed

withstand

the shock,

vibration,

and

other

extreme

conditions

associated

with

portability.

The

500

kilohertz

vertical system pro-

vides vertical

deflection

factors

from

one

millivolt

(at

reduced

bandwidth)

volts

division

at the

tip

the

integral high-impedance probe.

The

trigger

circuits

provide

stable triggering over the

full

bandwidth

capabili

tie

the

vertical system.

The

horizontal

deflection

system provides

calibrated

sweep rates

from

200

milliseconds

five

microseconds/

division.

continuously

variable sweep

magnifier

provides

uncalibrated sweep rates

at least five times the

indicated

sweep rate,

for

maximum

sweep rate

lea

st one

microsecond/division.

addition,

external

horizontal

amplifier

operation

provides

horizontal

deflect

ion

factors

one and 10 volts/

division.

The

resultant

CRT

display

produced

the vertical and

horizontal

deflection

systems

211-0perators

Manual 1

presented

a 6 x

division

graticule

(each division

equals

0.203

inch).

The

211

can

operated

either

from

AC line voltage

from

internal

rechargeable

batteries.

Maximum

total

power

consumption

two

watts.

The

internal

batteries

can

recharged

from

the

power

line

the

integral

battery

charger

(instrument

off).

OPERATING

VOLTAGE

Internal

Battery

Operation

The

211

designed

primarily

for

operation

from

the

internal rechargeable

batteries.

The

operating

time

provided

from

the

internal

batteries

depends

trace

intensity,

charge

temperature,

and

discharge

temperature.

Typical

operating

time

from

fully

charged

bat

terie

maximum

trace

intensity

when

charged

and

operated

+20°

+30°C

(+68°F

+86°F)

4.5

hours.

Extended

operating

time

provided

lower

trace

intensity.

The

BATTERY

meter

provides

indication

relative

charge

level. When

the

meter

indicates

the

FULL

range,

the

internal

batteries

are

charged

sufficient

level

operate

the

instrument.

However,

the

BATTERY

meter

out

the

region,

not

than

minutes

instrument

operation

remains.

The

211

incorporates

automatic

battery

protection

circuit

prevent

deep

dis-

211-0perators

Manual ®

charge and

the

resulting

battery

damage if

the

instrument

operated

after

the

battery

charge level falls

about

volts.

AC Operation

All

power

ne voltages

must

sinuso

al. If

the

ternal

batter

ies

the

become

discharged

the

minimum

operating

level,

continued

operation

can

obtained

connecting

the

instrument

power

source

with

the

attached

power

cord.

Due

the

circuitry

connected

the

internal

battery

charger,

the

power

line voltage

must

least

110

volts

for

operation

manner

Also,

when

operated

with

fully-charged

batteries

from

AC line below

about

110

volts and

maximum

true

intensity,

the

internal

batteries

slowly discharge; approxi-

mately

hours

continuous

operation

can

obtained

with fully charged

batteries

maximum

intensity

and

104-volt line.

The

internal

batteries

cannot

recharged

while

the

instrument

operated

from

the

AC line.

the

operated

power

line

other

than

115 VAC

Hz,

two

considerations

arise.

The

electrical

value

capacitors (C204,

C210, C212,

and C215)

the

instrument's

power

input

circuitry

must

changed. Refer

the

Maintenance

Section

the

Maintenance Manual

for

the

appropr

ate

values

capacitance

used .

® 211-0perators Manual 3

Also,

when

operating

the

211

other

power

sources,

all

likelihood

it will

necessary

adapt

the

power

plug

the

instrument's

attached

power

cord

the

power

outlet

receptacle

the

power

line

being

used.

Tho

instruments

ordered

specifically

for

use

outside

the

United

States

will

have

included

as an

additional

standard

accessory

power

cord

with

female

connector

one

end

that

mates

with

the

plug

the

211 's

power

cord,

and

plug

connector

the

other

end.

The

user

can

instalI

the

appropriate

plug

the

open

end

this

additional

cord,

and

then

use

this

cord

connect

the

211

the

various

power

outlet

receptacles.

Battery Charging

The

charging

characteristics

the

nickel-cadmium

iCd) cells used

instrument

vary

with

the

temperature

which

they

are

charged.

Batteries

charged

about

+20

°C

+30°C

(+68°F

+86°F)

will deliver

energy

than

when

the

same

batteries

are

charged

higher

lower

temperature.

charge

the

batteries,

connect

the

instrument

AC line

and

set

the

POWER

switch

the

OFF

position.

Allow

least

hours

for

the

batteries

reach full

charge.

For

longest

operating

life

the

batteries,

increase

the

charge

time

the

instrument

least

hours

about

once

month

Thi

procedure

balances

the

charge

all

cells

the

battery,

and

reduces

the

possibility

any

individual cell

becoming

reverse

charged

211-0perators

Manual

When the

instrument

is stored and

not

used

for

extended

periods

time,

the

nickel

cadmium

batteries

may

self-

discharge. The rate at

which

this

self-discharge occurs

dependent

upon

the storage

temperature

and

humid

instrument

stored

for

extended periods

time,

particularly

either

high

ambient

temperature

high

humidity,

recommended

that

the batteries

run

through

full

charge cycle

(16

hour

s) a

bout

every

two

weeks,

that

the ins

trument

left

connected

the

line.

Operating Temperature

The

211 can

operated where the

ambient

air

temperature

between

-15

°C and

+55

°C (+5°F and

+131°

The

batteries should be charged

onl

y in

ambient

temperatures between 0°C and +

°C (+32°F and +104°

CONTROLS

AND

CONNECTORS

General

The

controls

and connectors

for

operation

the 211

are located on the

right

side

the

trument

make

full

use

the capabilities

this

instrument,

the

operator

should

familiar

with

the

function

and

use

each

these

controls

and connectors. A

brief

description

each

control

and

connector

given here. Some

the

important

instrument

specifications are included here also.

211-0perators

Manual 5

VOL

TS/DIV-selects

vertical

deflection

factor

(variable

con-

trol

must

CAL

position

for

indicated

deflection).

Calibrated

position

accuracy

within

5%.

Vertical

system

bandwidth:

mV/

div,

100

kHz;

mV/div,

200

kHz;

mV/div,

400

kHz;

mV/

div

V/div,

500

kHz.

211-0perators

Manual ®

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