Tektronix SC 501 Instruction Manual

INSTRUCTION

MANUAL

Tektronix,

Inc.

P.O.

Box 500

Beaverton, Oregon 97005

Serial Number

070-1700-00

First Printing APR 1974

sc

501

TABLE

OF

CONTENTS

Page

SECTION 1

OPERATING INSTRUCTIONS

Introduction

Description

1-1

Installation and Removal

1-1

Controls

& Connectors

1-2

Operating Considerations

1-3

Deflection Factors

1-3

Applying Signals

1-3

Input

Coupling

1-3

Sweep

Triggering

1-3

Rear Interface

1-4

Table

1-1

Rear Connector Pin Assignments

1-4

Input

Assignments

1-4

Output Assignments

1-5

Electrical Characteristics

1-5

Table

1-2

Vertical Deflection

System

1-5

Table

1-3

Horizontal Deflection System

1-6

Table

1-4

Triggering

1-6

Table

1-5

Display

1-7

Table

1-6

Environmental

1-7

SECTION

2 SERVICING

INFORMATION

Introduction

2-1

Contents

2-1

Maintenance

2-1

Cathode-Ray Tube

Replacement

2-1

Test Equipment Required

2-2

Diagrams and Parts Lists

2-3

Electrical Parts List

2-4

Calibration

Adjustments

Component Locations (reverse side of foldout)

Block Diagram

Input &

Vertical

Amplifier

(Circuit Description)

Sweep

&

Horizontal Amplifier (Circuit Description)

Z-Axis & CRT Circuit (Circuit Description)

Low Voltage Supplies

(Circuit Description)

Mechanical

Parts List

Fig. 1 Exploded

View

Fig. 2 Accessories &

Repackaging

CHANGE

INFORMATION

sc

501

Section 1—SC 501

OPERATING

INSTRUCTIONS

INTRODUCTION

DESCRIPTION

The SC

501

general

purpose oscilloscop)e is

designed

to

operate

in

a

TM 500

Series Power

Module. The

SC

501 has

a

bandwidth of

at

least

5

MHz

and

a

calibrated

vertical

deflection range

from

10 mV/DIV

to

1 V/DIV,

selectable

in

decade steps.

An uncalibrated

VARIABLE control

extends

this

range

to at

least 10

volts/division.

Calibrated sweep

rates are selected by

pushbutton-

controlled

logic in decade steps

from

1

ms/DIV

to

lOOms/DIV

(millisecond

range)

and

in decade steps

from

1

ms/DIV

to 100 ms/DIV

(microsecond

range). A

VARIABLE

control

extends

the

slowest calibrated sweep

rate

to

at

least 1

second/division and

a

X5

Magnifier

extends

the fastest

calibrated

sweep

rate

to

at

least

200

nanoseconds/division.

The

triggering circuits

allow stable

triggering from either

internal or external sources. An AUTO

triggering mode and

manual LEVEL/SLOPE

selection

is

combined in

a

single

control. With no

input signal,

automatic

triggering provides

a

bright baseline

at

all

sweep rates.

An internal switch

converts the

horizontal deflection

system

of the

SC

501 to

an External Horizontal

Amplifier

mode

of operation.

INSTALLATION AND

REMOVAL

The

SC

501

is calibrated and ready

for use as

received.

Referring to

Fig. 1-1,

install the

SC

501

and turn on

the

Power

Module. Check

that the POWER

indicator on

the

SC

501 front panel comes

on.

NOTE

It

is

recommended

that the

Power Module be

turned

off before

inserting or removing

the

SC

501. Arcing

at

the

rear connector terminals

can reduce

connector

life. However,

no internal

damage will

result

if

the

SC

501 is

inserted in

a

live Power

Module.

Refer

to

CONTROLS &

CONNECTORS

(Fig.

1-2)

for

description

of front panel

controls, connectors

and

indicators.

©

1-1

Operating

Instructions—

SC 501

CONTROLS &

CONNECTORS

NOTE

Switch

for

Y-T

or

X-Y

operation located inter-

nally; right

side,

lower cen-

ter of instrument.

Vertical

Input Connector.

BNC connector for

vertical

amplifier signal

input.

VARIABLE

Control

Extends

each

calibrated

vertical

deflection factors

over

a 10:1

range. Maxi-

mum

at

least

10 V/Dhr.

Trigger Controls.

LEVEUSLOPE

selection

from

INT or EXT

sources.

Pull

LEVEL/SLOPE

con-

trol

out

for

AUTO

trig-

gering mode.

Sweep

VARIABLE

and

X5

Mag.

Variable controls

extends

each calibrated

sweep

rate

over

a

10:1 range.

Slowest

sweep rata

1

sac/Oiv.

Pull

variable

out

for

X5

magni-

fication of each

calibrated

sweep

rata. Fastest

cali-

brate

sweep rate

at least

200

ns/Div.

SC 501

OSCILLOSCOPE

p

—

;

—

!

I

i

t

1

1

i

!

"-ImTUISI

Jl

TY

EXT

HORIZ

pin

jack.

Operates

in

conjunction

with

internal

swit^ to

al-

low

X-Y

operation.

Range

EXT TRIG

pin

jack.

Allows

sweep

triggering

from

external

sources.

Tima/Div

button.

A

push-push switch

to

al-

low

selection of a

milli-

second or

microsecond

range

for the

calibrated

Time/Oiv settings.

FOCUS

Control

Provides

adjustment to

obtain

a

well-defined

dis-

play.

INTENSITY

Control.

Controls

display

brightness.

POSITION Control.

Positions

display vertically.

Volts/Div

Pushbuttons.

Two

self-canceling switches

select the

calibrated deflec-

tion factors as

indicated.

T o

return

to

the

10 mV/Oiv

setting, depress

the unused

pushbutton

just

enough

to

release the other

pushbutton.

POSITION

Control.

Positions

display

horizon-

tally.

Time/Div Pushbuttons.

Two

self-canceling

switches

select the calibrated

sweep

rates as

indicated.

Ground Connector.

Chassis

return connector

for signals.

Fig.

1-2.

CONTROLS

&

CONNECTORS.

Operating

Instructions—SC 501

OPERATING

CONSIDERATIONS

DEFLECTION FACTORS

The

amount of

vertical

deflection

produced

by

a

signal is

determined

by the signal amplitude,

the attenuation factor

(if

any)

of the probe, the setting of the

Volts/Div

pushbuttons,

and

the setting

of

the associated

VARIABLE

control.

Use

the

largest deflection factor

.(1

V/DIV)

when first

connecting

the

SC

501 to an

unknown voltage source.

If

the

deflection is too

small

to

make the measurement,

switch

to a

lower

deflection factor.

The

deflection factors

indicated

by the

Volts/Div push-

buttons

are calibrated

only when the

VARIABLE

control is

rotated

fully clockwise.

The range

of the VARIABLE

control is

at

least 10:1.

It

provides

uncalibrated

deflection factors covering the full

range

between

the fixed settings of Volts/Div pushbuttons.

The

VARIABLE

control extends the maximum deflection

factor to at

least 1

0

volts/division.

APPLYING SIGNALS

While most

connections

to

the

SC

501

will probably be

made

using coaxial

cables, probes offer

another convenient

method

of

applying a'

signal

to

the input of the

SC

501.

Tektronix

probes are

shielded

to

prevent

pickup

of

electro-

static

interference.

A 10X

attenuator

probe offers a

high

input

impredance and

allows the circuit under test to

perform

very close to

normal operating conditions. The

SC

501

is

compatible with probes

such as Tektronix P6006

and

P6028

Passive

Probes. When probe

attenuation is not

desired,

a

Tektronix P6011

Passive Probe

is recommended.

NOTE

Probe

compensation should be

checked with a

known

signal

(risetime of 700

nanoseconds or

less) before

using

the

SC

501.

Input

time constant is

normalized

for

each

attenuator step.

Unshielded test leads

can sometimes

be used to

connect

a

signal

source

to

the

SC

501,

particularly

when

a

high-level,

low-frequency signal is monitored at a

low

impedance

point. However, when any

of these

factors are missing, it

becomes

increasingly important to use

shielded cables. In

all cases, the signal

transporting leads should

be kept as

short

as

practical.

Be

certain that

a

common ground

connection is established

between the device under test

and

the

SC

501

.

The shield of a

coaxial cable or ground strap of

a

signal

probe

provides

an adequate

common

ground

connection.

INPUT COUPLING

The

AC COUPL

pushbutton switch allows

a

choice of

input coupling. The type of

display desired

determines the

method of coupling used.

Dc

coupling

(button out)

can be used for most

applica-

tions. However,

if

the dc compronent of

the applied

signal

is

much larger than the

ac

component, ac

coupling (button in)

will probably provide

a

better display.

Dc

coupling

should

be used to

display an

ac

signal below

ebout 3

hertz.

In

the

ac

coupling position, the dc

component

is blocked

by a

series capacitor

in the input circuit. The

low-frequency

response in the

ac

position is about

3 hertz

(—3

dB

point);

therefore, some

low-frequency attenuation

and

phase shift

can

be

expected

near this

frequency limit. Distortion

will

also appear

in square waves that

have

low-frequency

components.

SWEEP TRIGGERING

When the source

switch isinthe I NT

position,

the

sweep

is triggered by a

sample of the

signal applied to

the VERT

INPUT connector.

The display

is stable

for either Normal

or AUTO

triggering modes

as

long as

the signal frequency

is

above 10 Hz. Below

10 Hz, it may be

desirable

to

use

Normal mode

triggering (LEVEL/SLOPE

control

pushed

in). The

AUTO

triggering mode

(LEVEL/SLOPE

control

pulled

out)

reduces operator

adjustments

and provides a

bright

baseline in the absence

of an input

signal.

When

the

source

switch

is

in the

EXT

position,

the

sweep is

triggered

by

the

signal

applied

to

the

EXT

TRIG

pin jack.

The

signal applied

to

the

EXT

TRIG pin jack must

be

time-related

to

the signal appliedtothe

VERT

INPUT

connector in order

to

prevent drift in the display.

Operating

Instructions—SC

501

REAR INTERFACE

TABLE

1-1

REAR

CONNECTOR

PIN

ASSIGNMENTS

(REAR

VIEW)

Pin No.

Left (B)

Right

(A)

28 Unassigned

Unassigned

27

*

-t-

Gate

Out

‘EXT TRIG signal

26 Unassigned

‘

EXT TRIG common

23-25

Unassigned

Unassigned

22

Unassigned

Unassigned

18-21

Unassigned

Unassigned

17

‘VERT INPUT

signal

‘

EXT HORIZ common

16

‘VERT INPUT common

‘EXT

HORIZ signal

14

Unassigned

Unassigned

15 Unassigned

Ramp Out

13

Not used

Not used

12 +33.5

V

Filtered

dc

+33.5

V Filtered dc

11

Collector PNP Series-Pass

Transistor

Base

PNP

Series-Pass Transistor

10

Not used

Emitter

PNP

Series-Pass Transistor

9 ±33.5

Vdc common

±33.5

Vdc common

8 —33.5

V

Filtered

dc

—33.5

V Filtered

dc

7

Collector NPN

Series-Pass

Transistor

Emitter NPN Series-Pass Transistor

-6

No Connection

Base

NPN Series-Pass Transistor

1-5

Not used

Not used

*

Instrument not supplied

with these connections.

See INPUT

and OUTPUT

ASSIGNMENT.

NOTE

Refer

to

Power

Module instruction

manual for

information concerning pins labeled

Not

used.

INPUT ASSIGNMENTS

The VERT INPUT signal,

EXT TRIG signal

and

EXT

HORIZ signal

can be applied

through

the rear

interface

connectors if

the

SC 501 is modified

as

follows:

A. VERT INPUT signal.

1. Unsolder the 200 ohm resistor

attached

to

the

VERT

INPUT connector.

Connect tl\e center conductor

of a coaxial cable

to

the 200 ohm

resistor. Connect the

coaxial cable shield

to ground.

2. Connect the other end

of the coaxial cable: center

conductor

to

pin

17B

and

shield

to

pin

16B

(common).

NOTE

Parallel operation

may

be

obtained if

another

200 ohm

resistor

is

connected in series

with

the

center conductor of

a

coaxial cable to the

junction

of

R100 and the main circuit board. The

addition

of

any

coaxial cable

to

input circuits affects

the input

impedance.

B. EXT TRIG

signal.

1 .

Connect the center conductor of

a

coaxial

cable

to

the EXT TRIG pin jack. Ground the

coaxial

cable

shield.

2.

Connect the other end of the

coaxial

cable:

center

conductor to pin 27A

and

shield

to

pin 26A

(common).

1-4

REV. B,

AUG.

1974

Operating

Instructions—

SC 501

3. Set

the trigger

source switch to

the

EXT

position

to

trigger

the

sweep from

pin

27A.

C. EXT

HORIZ signal.

1 .

Connect

the center conductor of a

coaxial cable

to

the

EXT

HORIZ pin jack.

Ground the coaxial

cable

shield.

2. Connect

the other end of the

coaxial cable: center

conductor to pin 16A

and

shield

to

pin

17A (common).

OUTPUT

ASSIGNMENTS

A

+

Gate Out

signal can

be routed to

the rear

interface

connector via

the

center conductor

of

a

coaxial

cable to

pin

27B.

Shield ground may be any

convenient

location. A

Ramp Out Signal is

factory

wired to

pin

15A

.

Other

pins

(unassigned)

are

available

at

the rear

interface

connector

for

routing signals to

and from the

SC

501 for

specialized

applications. One or more

compartments

of

a

multi-plug-in

Power Module can

be wired

with

barriers installed to

provide specific

functions

between

compartments.

See

Power Module

instruction

manual

for

additional

information.

ELECTRICAL

CHARACTERISTICS

PERFORMANCE

CONDITIONS

The

electrical

characteristics

are valid

only if the SC 501

has

been

calibrated at an

ambient

temperature

between

-h

20°C

and

-t-30°C

and is

operating at

an

ambient

temperature

between

0°C

and

-h

50°C

unless

otherwise

noted.

TABLE

1-2

VERTICAL DEFLECTION

SYSTEM

CHARACTERISTICS

Characteristics

Performance

Requirements

Supplemental

Information

Bandwidth

Dc to

at

least 5 MHz.

Deflection

Factors

10

mV/div,

100

mV/div, and 1 V/div.

Accuracy

Within 3%

of indicated deflection.

VARIABLE in XI

(fully cw)

position:

gain

correctly

set at 10

mV/div.

Uncalibrated

(Variable)

Range

Continuously variable

between steps.

Extends

deflection factor

to a

maximum

of 10

V/div.

10:1 range

for

all attenuator settings.

Low

Frequency

Linearity

0.1

division or

less

compression or

expansion of

a

two

division (at

center

screen)

signal when p>ositioned to

the

top

and bottom of

the graticule area.

Input

Coupling

Ac or dc.

Lower

bandwidth

limit when

ac-coupled

is approximately

3 Hz.

Input

Impedance

1 MJ7

paralleled by 47

pF.

Input time constant

is

normalized for

each attenuator step.

Maximum

Safe Input Voltage

350 V (dc +

peak ac).

REV.

B, AUG.

1974

1-5

operating

Instructions—SC

501

TABLE

1-3

HORIZONTAL

DEFLECTION

SYSTEM

CHARACTERISTICS

Characteristics Performance

Requirements

Supplemental

Information

Time

Base

Calibrated Sweep Rates

1 ms/div,

10

ms/div, 100 ms/div,

1

ps/div,

10

ps/div, 100

/is/div.

Uncalibrated

(Variable) Range

Extends slowest

calibrated rate to at

least

1 sec/div.

10:1

range for all

calibrated

rates.

Zero to

10 V ramp

output

available at

rear

interface

connector for

all sweep

rates

(excluding

X5

magnification).

X5

Magnifier (fixed)

Extends

fastest

calibrated sweep rate to

at

least 200

ns/div.

Accuracy (Over

8

div)

Within 5%

for all

sweep

rates.

Disregard

first

0.5

ps

of total sweep

length.

Linearity (any two

division

fxartion

within center

eight divisions)

Within 5%.

Disregard

first

0.5

/is of total sweep

length.

External Horizontal

Amplifier

Internal

switch

must

be

set

to

X-Y

position.

Bandwidth

Dcto

100 kHz.

Internally

calibrated

for

100 mV/div.

Input lmF>edance

Approximately 100

kJ2

paralleled by

25

pF.

Maximum

Input Voltage

±3

V.

TABLE

1-4

TRIGGERING

CHARACTERISTICS

Characteristics

Performance

Requirements

Supplemental

Information

Normal Trigger

Sensitivity (Trigger

LEVEL/SLOPE control

pushed in)

Internal: Dc-coupled

0.4 major

division of

deflection at dc

increasing to 1.0

major

division of

deflection at

5

MHz.

External: Dc-coupled

1 V

minimum

to 5

V

maximum

from dc

to 5 MHz.

Input

Impedance

22 Kfi

paralleled by

approximately

150

pF.

AUTO

triggering

(Trigger LEVEL/

SLOPE

control

pulled to out

position)

Sweep

free-runs in

absence of

trigger

signal or for

trigger repetition

rates

below

10 Hz.

Operating

Instructions—

SC

501

TABLE

1-5

DISPLAY

CHARACTERISTICS

Characteristics

Performance Requirements

Supplemental

Information

Graticule

Type Internal black line, nonilluminated.

Area

Six divisions vertical

by 10

divisions

horizontal.

Each division

equals

0.203 inch.

Phosphor P31

standard.

TABLE

1-6

ENVIRONMENTAL

CHARACTERISTICS

Characteristics

Performance

Requirements Supplemental

Information

Temperature

Operating

0°C to

-t50°C.

Storage

-40°C to +75‘’C.

Altitude

Operating To

15,000

feet.

Storage To 50,000

feet.

Vibration

Operating

and Non-operating

With the instrument complete

and

operating, vibration frequency swept

from 10

to

50 to

10 Hz

at

1 minute per

sweep. Vibrate 15 minutes in each

of

the

three major axes at 0.015 inch total

displacement.

Hold 3 minutes at

any

major

resonance,

or

in

none,

at

50 Hz.

Tot^l time,

54 minutes.

Shock

Operating and Non-operating

30

g's, 1/2

sine,

1 1 ms duration, 2 shocks

in

each direction along

3 major

axes, for

a

total of

12

shocks.

1-7

Section

2—SC 501

SERVICING

INFORMATION

INTRODUCTION

CONTENTS

This

section of

the manual

contains

information neces-

sary to

service

the

SC

501

A

block

diagram

and

schematic

drawings are

provided as

an

aid

in

understanding the

theory

of

operation

of the

SC

501.

A circuit

description

for each

schematic

drawing

is

included on

the

associated

foldout page.

Adjustment and

calibration

procedures are

provided on

a

foldout

page

with supporting

illustrations that

show inter-

nal adjustment

locations and

measurement

check points.

Also included is

the

electrical parts list and a

component

location

grid

to

facilitate the location

of the components

on

the etched

circuit boards.

Mechanical

parts are

listed

in the

rear of

this

section

with an

exploded

view of

the

instrument. A

list of

standard

accessories and

a

carton assembly

drawing are

on

the back

of

the

exploded view foldout

page.

MAINTENANCE

General system

maintenance

procedures are

provided in

the Power Module instruction

manal,

i.e.,

preventive main-

tenance, troubleshooting aids, parts

removal

and

replace-

ment procedures, parts ordering information, etc.

Adjustment

of

the

SC

501 may be required after

a

repair

has been made, or after long time

intervals

in

which normal

aging of components may

affect instrument accuracy.

Before

complete calibration, thoroughly

clean and in-

sfject

this

instrument as

outlined in the service section of

the Power

Module

instruction manual.

Refer to

Fig.

2-1

as

an aid

in removing

or

replacing the

cathode-ray tube.

CRT

base

socket

NOTE

It

is

not necessary

to

remove the

crt shield

or

front

panel.

CRT shield

Use

care

when handling a

crt.

Protective

clothing and

safety

glasses

should

be

worn. Avoid

striking it

on

any object

whidi

might cause it to

crack or

implode.

When storing a crt,

place

it in a

protective car-

ton or set

it face down in a

protected

location on

a

smooth

surface with a soft mat under the

faceplate

to

protect it from

scratches.

Fig.

2-1. Replacing

the cathode-ray tube.

Replacing

the

crt

will require

partial

instrument readjostments. Refer

to

CALIBRATION

ADJUST-

MENTS

foldout

page.

2-1

Servicing

Information—SC 501

TEST

EQUIPMENT REQUIRED

The

following test equipment and accessories,

or its

equivalent, is

required

for

complete

calibration

of

the

SC

501.

Specifications

given

for

the test

equipment

are

the

minimum

necessary

for accurate

calibration

or

measure-

ment. All test

equipment

is assumed

to

be correctly

calibrated

and operating

with specifications.

If other

test

equipment

is substituted, control settings or

calibration setup may

need

to

be altered to meet

the

requirements of

the

equipment

used.

Detailed

operating

instructions

for the test

equipment used

are not given in

the

adjustment

or

calibration procedures.

Refer

to

the

instruc-

tion manual

for the test

equipment if more

information is

desired.

1. TM 500

Series Power

Module

2.

Plug-in

Extender.

Tektronix Part

No.

067-0645-01.

3.

Variable

Autotransformer.

Must be

capable of

supplying

sufficient wattage

over

a

range of

90

to

132 V or

180 to

264 V.

Autotransformer

must have an ac

voltmeter

to

indicate

output

voltage.

4. Dc

Voltmeter:

accuracy

within 0.1% and a

measure-

ment

range from

—1000

V to

-t-100

V.

For example,

a

DM

501

Digital

Multimeter, or any

high impjedance

dc

voltmeter

meeting the above

requirements.

5.

Amplitude

Calibrator:

accuracy

within 0.25%. Out-

put

amplitudes

from

50

mV

to

10 V.

Square-wave

repeti-

tion rate about

1 kHz. For example, Tektronix

Calibration

Generator

PG

506 or

Calibration Fixture

067-0502-01.

6. Test

Oscilloscop>e. Minimum bandpass

of

1

MHz

and

deflection

factor

of at

least 10 mV/div

with

a 10X

probe.

For

example, Tektronix 5103/D10

oscilloscope

with

5B10N

Time

Base/Amplifier,

5A23N

Amplifier

plug-in

and

a

P6006 probe, or any

oscilloscope that meets the

above

requirements.

7.

Leveled Sine-Wave

Generator.

Tektronix

SG 503 or

191

Constant-Amplitude

Signal Generator.

8.

Time-Mark

Generator.

Tektronix

TG 501

or

2901.

9.

Input

Ndrmalizer

47

pF (BNC).

Tektronix Calibra-

tion Fixture

067-0541-00.

10. 50-ohm termination with BNC connectors.

Tektronix Part No. 01

1-0049-01.

11.

Coaxial cables. Impedance

50 ohms, RG 58/U,

maximum length

42 inches,

BNC

connectors.

Tektronix

Part No.

012-0057-01.

12. Adapter, BNC

to

pin

jack. Tektronix

Part

No.

1

75-1

1 78-00, or

equivalent.

13.

Screwdriver, three-inch

shaft, 3/32

bit. Xcelite

R-3323.

14.

Low-capacitance

screwdriver, one and

one-half inch

shaft.

Tektronix Part No.

003-0000-00.

Servicing

Information—

SC

501

DIAGRAMS

AND PARTS

LISTS

SYMBOLS

AND

REFERENCE

DESIGNATORS

Electrical

components

shown on the

diagrams are in

the following units

unless

noted otherwise:

Capacitors

=

Values one or

greater are

in picofarads (pF).

Values less

than one

are in microfarads

(pF).

Resistors

=

Ohms

Symbols

used

on

the

diagrams are based on

ANSI

Y32.2

—

1970.

Logic

symbology

is

based

on MIL-STD-806B

in

terms of positive logic. Logic

symbols

depict the logic function

performed

and

may

differ

from

the manufacturer's data.

The

following

special

symbols are used

on the

diagrams:

External Screwdriver adjustment.

External

control or connector.

Clockwise

control

rotation

in

direction of

arrow.

Refer

to

diagram

number indicated

in

diamond.

Refer

to

waveform

number indicated

in

hexagon.

Connection

soldered to

circuit board.

Connection made to

circuit

board

with interconnecting

pin.

Blue

tint

encloses

components

located on

circuit

board.

P/0

circuit

board

ELECTRICAL

REPLACEABLE

PARTS

LIST

PARTS ORDERING INFORMATION

Replacement parts are available from

or through your

local Tektronix,

Inc.

Field

Office or representative.

Char>ges

to Tektronix

instruments are

sometimes made

to accommodate

improved

components as they become available, and to give

you

the benefit

of the

latest

circuit

improvements developed in our engineering department.

It is

therefore

important,

when

ordering parts,

to

include the following

information

in your order:

Part number,

instrument type or number, serial number,

and modification

number if

applicable.

If

a f)art you

have

ordered

has been replaced with

a

new

or improved

part, your

local Tektronix, Inc.

Field

Office or representative will

contact

you concerning

any

chartge in

part

number.

Change information,

if

any, is located at

the

rear of this manual.

SPECIAL NOTES

AND SYMBOLS

XOOO Part first added

at

this serial number

OOX

Part removed after

this serial number

ITEM NAME

In the Parts List, an Item Name is

separated from

the description

by

a colon

(:).

Because

of

space limitations, an

Item Name may sometimes appear

as incomplete.

For

further Item Name

identification, the

U.S.

Federal

Cataloging Handbook

H6-1

can be

utilized

where

possible.

ABBREVIATIONS

ACTR ACTUATOR

PLSTC PLASTIC

ASSY ASSEMBLY QTZ

QUARTZ

CAP CAPACITOR, RECP

RECEPTACLE

CER CERAMIC

RES RESISTOR

CKT CIRCUIT

RF RADIO

FREQUENCY

COMP COMPOSITION

SEL SELECTED

CONN CONNECTOR SEMICOND

SEMICONDUCTOR

ELCTLT ELECTROLYTIC SENS

SENSITIVE

ELEC

ELECTRICAL SEP

SEPARATELY

FXD FIXED

VAR

VARIABLE

INC

AND

INCANDESCENT

WW

Wl

REWOUND

LED LIGHT

EMITTING DIODE

XFMR

TRANSFORMER

NONWIR

NON

Wl

REWOUND

XTAL

CRYSTAL