Tektronix 214 Manuale utente

Tektronix

COMMITTED

EXCELLENCE

WARNING

THE

FOLLOWING

SERVICING

INSTRUCTIONS

ARE

FOR USE

QUALIFIED

PERSONNEL

ONLY.

AVOID

PERSONAL

INJURY,

NOT

PERFORM

ANY

SERVICING

OTHER

THAN

THAT

CONTAINED

OPERATING

INSTRUCTIONS

UNLESS

YOU

ARE

QUALIFIED

SO.

Tektronix,

Inc.

P.O.

Box

500

Beaverton,

Oregon

97077

070-1483-00

214

STORAGE

OSCILLOSCOPE

SERVICE

INSTRUCTION

MANUAL

Serial

Number

First

Printing

AUG

1973

Revised

APR

1981

http://manoman.sghill.com

“ip

;

Printed

U.S.A.

Specification

and

price

change

privileges

are

reserved.

SECTION

TABLE

CONTENTS

INTRODUCTION

General

Information

Specifications

Vertical

Deflection

System

Triggering

Horizontal

Deflection

System

Display

Isolation

Operation

Internal

Battery

Operation

Environmental

Physical

FUNCTIONS

CONTROLS

AND

CONNECTORS

Front

Panel

Controls

Side

Panel

Controls

SECTION

MAINTENANCE

REV

APR

1981

Introduction

Preventive

Maintenance

General

Cleaning

Lubrication

Visual

Inspection

CRT

Care

Recalibration

Information

Disassembly

Instructions

Troubleshooting

Introduction

Troubleshooting

Aids

Troubleshooting

Equipment

Corrective

Maintenance

Obtaining

Replacement

Parts

Component

Replacement

Recalibration

After

Repair

Instrument

Repackaging

Page

1-1

1-2

1-3

1-4

2-1

2-2

3-1

3-2

3-3

3-4

3-6

214

Service

214

Service

TABLE

CONTENTS

(cont)

SECTION

CALIBRATION

General

Test

Equipment

Required

Special

Calibration

Fixtures

Preliminary

Procedure

Preliminary

Control

Settings

Power

Supply

and

Display

Check Power

Supply

Levels

Adjust

CRT

Grid

Bias

Adjust

FOCUS

Adjust

Trace

Rotation

Adjust

Storage

Operating

Level

Adjust

Wall

Band

Level

Adjust

Enhance

Level

Adjust

Hum

Balance

Vertical

System

Adjust

Vertical

Centering

Adjust

Channel

Step

Attenuator

Balance

Adjust

Channel

Step

Attenuator

Balance

Adjust

Vertical

Gain

Adjust

Storage

Vertical

Gain

Check

Channel

Variable

Volts/Division

Range

Check

Channel

Volts/Division

Accuracy

Check

Input

Coupling

Switches

Check

Volts/Division

Accuracy

and

Variable

Volts/Division

Range

Check

Channel

Volts/Div

Compensation

Check

Channel

Volts/Div

Compensation

Check

Vertical

Amplifier

Bandwidth

Trigger

Circuit

Adjust

AUTO

PRESET

Level

Check

Trigger

Circuit

Operation

Check

Single

Sweep

Operation

Horizontal

System

Adjust

Horizontal

Centering

Adjust

Horizontal

Gain

Adjust

Sweep

Calibration

Check

Variable

Horizontal

Magnifier

Range

Check

SEC/DIV

Accuracy

REV.

APR

1974

Page

4-1

4-3

4-4

4-5

4-6

4-7

4-8

4-9

4-10

4-11

4-12

4-13

4-15

4-16

REV.

OCT.

1975

TABLE

CONTENTS

(cont)

SECTIONS

TROUBLESHOOTING

AIDS

Diagram

Information

Component

Color

Coding

Troubleshooting

Equipment

SECTION6

CIRCUIT

DESCRIPTION

Block

Diagram

Description

Circuit

Operation

Vertical

Input

Amplifiers

Vertical

and

Horizontal

Output

Amplifiers

Trigger

Generator

Sweep

Generator

Single

Sweep

Storage

Power

Supply

CRT

Circuit

SECTION

DELETED

(INFORMATION

NOW

INCORPORATED

SECTION

ELECTRICAL

PARTS

LIST

OPTION

INFORMATION

SECTION9

DIAGRAMS

AND

CIRCUIT

BOARD

ILLUSTRATIONS

SECTION

MECHANICAL

PARTS

LIST

CHANGE

INFORMATION

Page

5-1

6-1

6-3

6-4

6-7

6-9

214

Service

wy,

SiGe

swe

VOLTS/o1y

CHI

STo

RAGE

LOScoOpe

Tektronix

214

Storage

Oscilloscope.

214

Service

Section

1—214

Service

INTRODUCTION

GENERAL

INFORMATION

The

Tektronix

214

Storage

Oscilloscope

solid-state

portable

instrument

that

combines

small

size

and

light

weight

with

the

ability

make

precision

waveform

measurements.

designed

for

general-purpose

applica-

tions

where

display

storage

desired,

along

with

conven-

tional

(NONSTORE)

operation.

The

instrument

mechanically

constructed

withstand

the

shock,

vibration,

and

other

extremes

associated

with

portability.

The

dual-channel

DC-to-500

kilohertz

vertical

system

provides

vertical

deflection

factors

from

one

millivolt

(at

reduced

bandwidth)

volts/division

the

tip of

either

the

integral

high-impedance

probes.

The

214

will

either

automatically

chop

alternate,

depending

upon

the

sweep

rate.

Single-trace

operation

achieved

turning

off

either

channel

with

its

position

control.

Single

Sweep

operation

provided

display

infrequently

recurring

events.

The

trigger circuit

provides

stable

triggering

over

the

full

range

vertical

frequency

response.

The

horizontal deflection

system

provides

calibrated

sweep

rates

from

500

milliseconds

five

microseconds/

division.

Uncalibrated

sweep

rates,

via

variable

sweep

magnifier,

are

available

least

five

times

the

indicated

sweep

rate for

maximum

least

one

microsecond/

division.

Stored

Automatic

Enhance

occurs

(in

the

Single

Sweep

mode)

sweep

rates

0.1

millisecond/division

and

faster.

X-Y

operation

provided

with

Channel

supplying

the

horizontal

deflection

the

applied

(X)

signal,

with

range

from

less

than

one

millivolt

volts/division

(at

reduced

bandwidth

kilohertz).

Channel

supplies

the

vertical

deflection

the

applied

(Y)

signal.

The

cathode-ray

tube

(CRT)

direct-view

bistable

Storage

tube

having

division

graticule

(each

division

equals

0.203

inch).

The

214

operated

either

from

line

voltage

from

internal

rechargeable

batteries.

The

internal

batteries

are

recharged

from

the

power

line

the

integral

battery

charger

(with

the

instrument

OFF).

This

instrument

will

meet

the

following

electrical

charac-

teristics

after

complete

instrument

calibration.

These

char-

acteristics

apply

over

ambient

temperature

range

—15°C

+55°C

(+5°F

+131°F)

when

operating

from

the

internal

batteries,

and

0°C

+40°C

(+32°F

+104°F)

when

operating

from

line

source,

except

otherwise

indicated.

Warmup

time

for

given

accuracies

five

minutes.

SPECIFICATIONS

Vertical

Deflection

System

DEFLECTION

FACTOR:

Calibrated

Range:

One

millivolt

volts/division.

steps

1-2-5

sequence.

Accuracy:

Within

with

VAR

VOLTS/DIV

control

CAL

position

and

gain

correctly

set

five

millivolts/

division.

Uncalibrated

(variable)

Range:

Continuously

variable

between

calibrated

settings.

Extends

maximum

deflection

factor

least

125

volts/division.

BANDWIDTH

(using

six-division

reference):

mV/DIV

V/DIV:

least

500

kilohertz.

mV/DIV:

least

400

kilohertz.

mV/DIV:

least

200

kilohertz.

mV/DIV:

least

100

kilohertz.

Lower

Bandwidth

Limit,

(capacitively)

Coupled:

About

two

hertz

all

deflection

factors.

INPUT

RESISTANCE:

One

megohm,

within

5%.

INPUT

CAPACITANCE:

mV/DIV

mV/DIV:

Approximately

160

pico-

farads.

100

mV/DIV

V/DIV:

Approximately

140

pico-

farads.

1-1

Introduction—214

Service

MAXIMUM

USABLE

INPUT

VOLTAGE:

V/DIV

0.1

V/DIV:

600

volts

(DC

peak

AC).

600

volts

peak-to-peak

(five

megahertz

less).

mV/DIV

mV/DIV:

600

volts

(DC

peak

AC).

not

over

two

kilohertz

risetime

not

less

than

100

nanoseconds.

CHOPPED

MODE:

From

500

ms/DIV

time

rate

approximately

kilohertz.

ALTERNATE

MODE:

From

ms/DIV

us/DIV

time

rate,

INPUT

IMPEDANCE

MATCHING:

Matched

within

10%.

GAIN

ACCURACY

BETWEEN

CHANNELS:

Within

with

both

VAR

VOLTS/DIV

controls

CAL

position

and

gain

correctly

set

mV/DIV.

Triggering

TRIGGER

SENSITIVITY:

Internal:

COMP:

0.2

division

from

500

kilohertz.

0.2

division

from

hertz

500

kilohertz.

External:

least

one

volt

from

500

kilohertz.

PRESET

TRIGGER

LEVEL:

Triggered

preset

level

positive

slope

triggering

signal.

Sensitivity

same

stated

above.

DISPLAY

JITTER:

0.5

microsecond

less

500

kilo-

hertz.

EXTERNAL

TRIGGER:

Input

Resistance:

Approximately

one

megohm.

Input

Capacitance:

Approximately

picofarads.

Maximum

Usable

Input

Voltage:

Eight

volts

(DC

peak

AC).

volts

peak-to-peak

(one

megahertz

less).

1-2

Horizontal

Deflection

System

SWEEP

RATE:

Calibrated

Range:

500

milliseconds

five

micro-

seconds/division.

steps

1-2-5

sequence.

Accuracy

(over

center

eight

divisions):

Within

with

VAR

HORIZ

MAG

control

CAL

position

and

timing

correctly

set

ms/DIV

(disregard

first

0.5

microsecond

sweep

length).

Linearity

(any

two

division

portion

within

center

eight

divisions):

Within

(disregard

first

10%

total

sweep

length).

Variable

Magnifier;

Continuously

variable

between

cali-

brated

settings.

Extends

maximum

sweep

rate

least

one

microsecond/division.

HORIZONTAL

INPUT:

Calibrated

Deflection

Factor:

One

millivolt

volts/

division.

Variable:

least

five

times

magnification

(using

VAR

HORIZ

MAG).

Accuracy:

Within

10%

(with

VAR

HORIZ

MAG

CAL).

X-Y

Phasing:

Less

than

3° to

five

kilohertz.

Maximum

Input

Voltage:

Same

for

(vertical).

Display

GRATICULE:

Type:

Internal

Black

line,

non-illuminated.

Area:

Six

divisions

vertical

divisions

horizontal.

Each

division

equals

0.203

inch.

Stored

Writing

Speed

least

divisions/millisecond.

least

500

divisions/

millisecond

Automatic

Enhance

(internal

adjustment).

Isolation

INPUT

COMMON

214

CASE

EXTERIOR:

(When

battery

operated

with

power

plug

secured

the

insulated

cover.)

Maximum

floating

potential

between

input

common

and

214

case

exterior

not

exceed

500

volts

RMS

sinusoidal

700

volts

(DC

peak

AC).

INPUT

COMMON

LINE:

Maximum

floating

voltage

plus

line

voltage

not

exceed

250

Volts

RMS

REV.

AUG.

1974

sinusoidal,

1.4

times

the

line

voltage

plus

(DC

peak

AC)

not

exceed

350

volts

CAUTION

Due

the

capacitive

line

input

circuit,

sudden

volt-

age

changes

may

cause

damaging

input

current

transients.

Avoid

operating

this

instrument

from

square-wave

inverter

supplies,

other

sources

that

produce

large

voltage

transients.

Operation

LINE

VOLTAGE

RANGE:

Stored

Mode:

110

126

volts

AC.

Batteries

can not

charged

during

operation.

Instrument

can

operated

between

104

and

110

volts

with

resulting

slow

discharge

internal

batteries.

Nonstore

Mode:

104

126

volts

AC.

Instrument

can

operated

without

resulting

discharge

internal

batteries.

LINE

FREQUENCY:

hertz.

NOTE

Refer

Option

and

Maintenance

information

for

other

Line

Voltages

and

Frequencies.

MAXIMUM

POWER

CONSUMPTION:

Three

watts

less

126

volts,

hertz.

Introduction—214

Service

Internal

Battery

Operation

BATTERIES:

rechargeable

size,

nickel-cadmium

cells.

CHARGE

TIME

(from

line):

hours

for

full

charge

(instrument

off

during

charge

cycle).

POWER

(BATTERY)

INDICATOR:

When

extinguished

indicates

approximately

five

minutes

scope

operating

life

left

the

batteries.

BATTERY

EXCESSIVE

DISCHARGE

PROTECTION:

In-

strument

operation

automatically

interrupted

when

battery

charge

drops

volts,

+0.5

volt.

TYPICAL

OPERATING

TIME

(at

maximum

trace

intensity

after

full

charge

cycle

+20°C

+30°C):

NONSTORE

Mode:

3.5

five

hours.

Longest

operating

time

provided

lower

trace

intensity.

STORE

Mode:

2.5

3.5

hours.

Longest

operating

time

provided

lower

trace

intensity.

TYPICAL

CHARGE

CAPACITY

(in

reference

charge/

discharge

+20°C

+30°C

+68°F

+86°F)

See

Table

1-1.

TABLE

1-1

Operating

Temperature

+20°C

+30°C

Charge

Temperature

—15°C

(+5°F)

(+68°F

+86°F)

+55°C

(+131°F)

O°C

(+32°F)

40%

60%

50%

+20°C

+30°C

(+68°F

+86°F)

65%

100%

85%

+40°C

(+104°F)

40% 65%

55%

REV.C,

APR.

1976

1-3

Introduction—214

Service

Environmental

Temperature:

Operating

from

Batteries,

—15°C

+55°C

(+5°F

+131°F)

Operating

from

Line,

0°C

+40°C

(+32°F

+104°F)

Non-Operating,

—40°C

+60°C

(—40°F

+140°F)

Altitude:

Operating,

25,000

feet

(maximum

operating

tem-

perature

decreased

1°C

per

1,000

feet

above

15,000

feet).

Non-Operating,

50,000

feet.

Humidity

(operating

and

non-operating):

five

cycles

(120

hours)

95%

relative

humidity

reference

MIL-E-16400F.

Shock

(operating

and

non-operating):

Tested

with

two

shocks

150g,

one-half

sine,

two

millisecond

duration

each

direction

along

major

axes.

Physical

WEIGHT

(without

accessories):

3.5

pounds

(1.6

kilograms)

DIMENSIONS

(measured

maximum

points):

Height;

3.0

inches

(7.6

centimeters)

Width:

5.25

inches

(13.2

centimeters)

Depth:

9.5

inches

(24.1

centimeters)

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