Tektronix TR 503 User manual

T~ktronoc

Tektronix,

Inc

Box

500

Beaverton,

Oregon



97077



Serial

Number

COMMITTED

EXCELLENCE

INSTRUCTION

MANUAL

070-3526-



First

Printing

Aug

1980

Section

GENERAL

INFORMATION

AND

SPECIFICATIONS

Section

OPERATING

INSTRUCTIONS

TABLE

CONTENTS

Introduction

.................

1-1

Overview

..........

........

1-1

Standards

..................

1-2

Electrical

Characteristics

..........



1-2

Environmental

Characteristics

......

1-3

Physical Characteristics

..........

1-3

Accessories

.................

1-3

Introduction

...................

2-1

About

the

Tracking

Generator

......

2-1

Installation

...................

2-1

Repackaging

..................

2-1

Functions

the

Controls

and

Connectors

...................

2-1

Operators

Checkout

Procedure

.....

2-2

Check

Flatness

..............

2-3

Check

Output

Level

...........

2-4

Tracking

Adjustment

..........

2-4

Measuring

Frequency

..........

2-4

WARNING

THE

FOLLOWING

SERVICING

INSTRUCTIONS

AREFOR

USE

QUALI

PERSONNEL

ONLY

AVOID

PERSONAL

INJURY,

NOT

PER-

FORMANYSERVICING

OTHER

THAN

THAT

CON-

TAINED

OPERATING

INSTRUCTIONSUNLESS

YOUARE

QUALIFIED

DOSO

Section

THEORY

OPERATION

General

Description

............

3-1

Block

Diagram

Description

........

3-3

Detailed

Circuit

Description

.......

3-3

and Microwave

Circuits

......



3-3

503

LIST

ILLUSTRATIONS



.................



iii



Section



THEORYOF

OPERATION

(cont)

OPERATORS

SAFETY

SUMMARY

...........



SERVICING

SAFETY

SUMMARY

............



Section

CALIBRATION

Section

MAINTENANCE

Bias

and

Leveling

Loop

Circuitry

. .

3-3

Phase Lock

Loop

.......

. .

3-4

Power

Supply

Regulators

......

3-5

Introduction

..............

. .

4-1

History

Information

.........

....

4-1

Equipment

Required

...........

. .

4-1

PERFORMANCE

CHECK

.........

4-2

Introduction

...................

4-2

Preliminary

Inspection

...........

4-2

Performance

Verification

..........

4-2

Check

Frequency

Range

........

4-2

Check

Output

Level

...........

4-2

Check

Flatness

..............

4-2

Check

Auxiliary

Output

Level

....

4-3

Check

for

Spurious

Signals

......

4-3

ADJUSTMENTPROCEDURE

......

4-4

Introduction

...................

4-4

Complete

Partial

Calibration

.....

4-4

Test

Points

...................

4-4

Preliminary

Preparation



..........



4-4

MHz

Oscillator

Mode

Adjust

...

4-4

Adjust

the

Normalizing

Attenuator



4-5

Output

Level

Calibration

........

4-6

Introduction

.................

5-1

Static-Sensitive

Components

.....

5-1

Preventive

Maintenance

..........

5-1

Cleaning

. .

....

...........

5-2

Exterior

. .

............

5-2

Interior

....

...........

5-2

Lubrication

. .

..........

5-2

Visual

Inspection

. .

..........

5-2

Transistor

and

Integrated

Circuit

Checks

...

. .

........

.....

5-2

Performance

Checks

and

Recalibration

. .....

. .

....

5-2

Troubleshooting

.......

...

. .

...

5-2

503

TABLE

CONTENTS

(cont)

Page



Page

Section 5

MAINTENANCE

(cont)



Section

MAINTENANCE

(cont)

Troubleshooting

Aids

..........

5-2



Replacing

Assemblies

..........

. .

5-7

Diagrams

. .

...

...........

5-2



Removing

Replacing

Semi-rigid

Circuit

Board

Illustrations

.....

5-3



Coaxial

Cables

.............

. .

5-7

Wiring

Color

Code

..........

5-3



Replacement

Microwave

Multiple

Terminal

(Harmonica)



Assemblies

. .

.....

. .

....



5-7

Connectors

...

...........



5-3



Separating

the

503

. .

....



5-7

Resistor

Values

. .

..........



5-3



Removing

the

Assembly

. .

...



5-7

Capacitor

Marking

..........



5-3



Replacing

the 2

.182

GHz

Four

Cavity

Diode

Color

Code

.........

5-4



Filter/Mixer

Assembly

........

5-8

Transistor

and

Integrated

Circuit



Remove

and

Replace

the

Filter

Configuration

....

.....



5-4



Assembly

........

.........



5-8

Diode

Checks

........

.....



5-4



Filter

AlignmentProcedure

....

5-8

General

Troubleshooting

Technique

5-5

Corrective

Maintenance

......

....

5-6



Section

REPLACEABLE

ELECTRICAL

PARTS

Obtaining

Replacement

Parts

....

5-6

Parts

Repair

and

Replacement



Section 7

DIAGRAMS

AND

CIRCUIT

BOARD

Program

................

...

5-6



ILLUSTRATIONS

Soldering

Technique

.....

5-6

Replacing

the

Square

for

the



Section

REPLACEABLE

MECHANICAL

PARTS

Multi-pin

Connectors

.......

...

5-6

Selected

Components

......

....

5-6



CHANGE

INFORMATION

LIST

LLUSTRATI

ONS



Page

2-1



`Plug-in

module

installation

..........



2-2



503/492

System

with

frequency

counter

2-3

3-1



503/492

System

diagram

.........

3-2

4-1



Setup

for

performance

check



........



4-3

4-2



Setup

for

adjustment

procedure

.......



4-5

4-3



Location

receptacle

W520,

and

C524

4-5

4-4



Location

adjustment

R215

and

adjustmentsR225,

R220,

and

R222

...~

4-6

5-1



Multipin

(harmonica)

connector

configuration

............

.......

5-3

5-2



Color

code

for

tantalum

capacitors



....



5-3



Diode

polarity

markings

.......

.....

5-4



configuration

for

semiconductor

components

...

............

. .

5-5



Procedure

for

separating

two

sections

the

503

......

...........



5-7

5-6



Typical

position

for

the

mixer

the

.182

GHz

filter

assembly

..........



5-8

5-7



503/492

System

diagram

showing

phase-lock

assembly

.............

5-9

5-8



Positioning

the

503

to adjust

the

.182

GHz

filter/mixer

assembly

.......



5-10

5-9



Location

P446on

the

mother

board



5-11

5-10



Typical

responses

the

filter/mixer

assemblies

.............

........

5-11

503

The

general

safety

information

this part

the

summary



supply

conductors

between

either

supply

conductor

for

both operating

and

servicing

personnel

Specific



and

ground

protective

ground

connection

way

ofthe

warnings

and

cautions

will

found

throughout

the



grounding

conductor

the

power

cord

essential

for

manual

where

they

apply,

but

may

not

appear

this



safe operation

summary

Terms

This

Manual

This

mainframe

grounded

through

the

grounding

CAUTION

statements

identify

conditions

orpracticesthat



conductor

the

power

cord

avoid

electrical

shock,

could

result

damagetothe

equipment

other

property



plug

the

power

cord

into

properly

wired

receptacle

before

connecting

the

product

input

output

ter

WARNING

statements

identify

conditions

practices



urinals

protective

ground

connection

way

the

that

could

result

personal

injury or loss

life



groundingconductor

the

power

cord

essential

for

safe

operation

Terms

Marked

Equipment

CAUTION

indicates

personal

injury

hazard not im-



panger

Arising

From

Loss

Ground

mediately

accessible

one

reads the marking,

hazard

property including

the

equipment

itself



Upon

loss of

the protective-ground connection,



all

accessible

conductive

parts

(including

knobs

and

con

DANGER

indicates

personal

injury

hazard

immediately



trots

that

may

appear

insulating)

can

render an

accessible

one

reads

the

marking



electric

shock

Symbols

This

Manual



Not

Operate

Explosive

Atmospheres

This

symbol

indicates

where

applicable



cautionary or

other

information

found

Symbols

Marked

Equipment

Power

Source

OPERATORS

SAFETY

SUMMARY

DANGER

High

voltage

Protective

ground

(earth)

terminal

ATTENTION

refer

manual

Grounding

the

Product

avoid

explosion,

not

operate

this

product

explosive

atmosphere

unless

has

been

specifically

certified

for

such

operation

Not

Remove

Covers

Panels

avoid

personal

injury,

not

remove

the

product

covers

panels

not

operate

the

product

without the

covers

and

panels

properly

installed

Not

Operate

Without

Covers

(for

500

plug-

ins

only)

avoid

personal

injury,

not

operate

this

product

The

mainframeisintendedtooperatefrom

apowersource



without covers

panels

installed

not

apply

power

that

does

not

apply

than

250

volts

rms

between

the



the

plug-in

via

plug-in

extender

Not

Service

Alone

SERVICING

SAFETY

SUMMARY

FOR

UALI

SERVICE

PERSONNEL

ONL

Refer

also to

the

preceding Operators

Safely

Summary

not

perform

internal

service

adjustment

this

product

unless

another

person

capable

rendering

first

aid

and

resuscitation

present



Power

Source

503

Disconnect

power

before

removing

protective panels,

soldering,

replacing

components

The

mai

nframe

intended

operate

from

power

source

Use

Care

When

Servicing

With

Power



that

does

not

apply

than

250

volts

rms between

the

supply

conductors

between

either

supply

conductor

Dangerous

voltages

exist

several

poi

nts

this

product



and ground

protective

ground

connection

way

the

avoid

personal

injury,

not

touch

exposed

connec-



grounding conductor

the

power

cord

essential for

tions

and

components

while

power



safe

operation

503

Tracking

Generator

3526-1

Overview

GENERAL

INFORMATION

AND

SPECI

CATI

ONS

The

Operators

part of

the

manual

intended

helpthe

user

obtain

maximum

performance

from

the

503/492

system

This

part

covers

General

Information

and

the

Operating

Instructions

The

Service

part of

the

manual

covers

the

Theory

Operation,

the

Calibration

section,

and

other

service

information,

including

the block

and

schematic

diagrams

the

503

Section

1-TR

503

Introduction



Section

2-Operating

Instructions

;

introducesthe

user

The

503

may

used

measure

the

frequency



to the

503/492

system

and

demonstrates

series

response

device

component

over a

100

kHz



measurement

procedures

GHz

range

used

conjunction

with

500

mainframe

and

492

Spectrum

Analyzer

The

tracking



Service

generator/spectrum

analyzer

method

response

measurement

has

intrinsically

greater

rejection

device



Section

3-Theory

Operation

;

describes

all

major

environmental

noisethanthealternatesweptsine-wave



circuits

the

503

method

Section

4-Calibration,

Part

Performance

Check

;

The

greater

noise

rejection

gained by having the

492



this

subsection

used

verify

all

the

Performance

Spectrum

Analyzer

track

the

503

output

Noise

rejec-



Requirements

the

Specification,

and

determine

the

tion

improved

the

Resolution

Bandwidth

the 492is



need

for

recalibration

(adjustment)

the

503

decreased

;

this

due

the

492

being

immune

noise

outside

the

(Variable

Resolution

IF)

bandwidth

Section

4-Calibration,

Part

Adjustment

Procedure

;



this

subsection

used

return

the

503

confor-

The

503

uses

the

1st

and2nd

(local

oscillator)



mance



with



the



Performance



Requirements



The





outputs

the492

generate

frequency

that

tracks

the



procedure

arranged

functional

blocks

facilitate

input

the

492

The

TRACKING

ADJUST

control

the



referencing



from



the



Performance



Check



and



the

503

allows

fine

adjustment

this

frequency



Maintenance

Instructions

Points

the

492

display

may

have

their

frequencies



Section



5-Maintenance



Instructions

;



describes

measured

adding

frequency

counter,

such

the



routine

and

corrective

maintenance

procedures

with

508,

the

503/492

system

Measurements

may



detailed



instructions

for



replacing



assemblies,



sub-

made

directly

from

external

spectrum

obtained



assemblies,

and

individual

components

exploded

from

the

response

curve

a device

under

test



drawing

part of

Section 8

Section

6-Replaceable

Electrical

Parts

;

provides

in-

formation necessary

order

replaceable

parts

and

assemblies

the

electrical

functions

the

instrument

Section

7-Diagrams

;

provides

functional

block

diagram

and

circuit

schematics

Pictorial

layout

drawings

which

show

subassembly

and

component

locations

are

adjacent

the

diagram

(usually

the

back

the

preceding diagram)

Voltage

and

signal

levels

are

includ-

aid

troubleshooting

The

eight

sections

the

manual

are



Section

8-Replaceable

Mechanical

Parts

;

provides

Operators



information

necessary

order

replace

mechanical

parts

This

list

cross-referenced

the

replaceable

Section

1-General

Information

and

Specifications

;



electrical

parts

list

where

appropriate

The

Exploded

contains

the instrument

description,

list

accessories,



Drawing

shows

the

assemblysequence

and

identifies

the

and

listing

the

503

Characteristics

and

Perfor-



assemblies

The

Accessories

page

lists

the

standard

and

mance

Requirements



optional

accessories

General

Information

and

Specifications-TR

503

Changes

and

Corrections

;

provides

updating informa-



Standards

lion

for

the

manual

the

form

inserts

These

inserts

are

incorporated

into

the

manual

text

and

diagrams

when

the



The

abbreviations

and

graphic

symbols

used

inthetext

manual

updated



and

diagrams

this

manual

are

based

onANSIY1

.1-1972,

ANSI

Y32

.2-1970,

and

ANSI

Y32

.14-1973

(American

National

Standards

Institute,

345

East

Street,

New

York,

10017)

The

following

specificationsapplytotheTR

503

Track-



Items

listed

the

Performance

Requirements

column

ing

Generator

and the

503/492

Spectrum

Analyzer



are

verified

completing

the

Performance

Check

system

Allow

least

minutes

warmup

unless

noted



Section 4

this

manual

Items

listed

theSupplemental

otherwise



Information

column

may

not

verified

this

manual

;

they are

either

explanatory

notes

performance

characteristics

for

which

limits

are

specified

Frequency

Range

Output

Level

Maximum

Output

Adjustment

Steps

Attenuator

Error

Output

Impedance

Flatness

503

Characteristic

503/492

System

Dynamic

Range

503/492

System

Residual

(peak-to-peak)

503

503/492

System

SPECIFICATIONS

Table

1-1

ELECTRICAL

CHARACTERISTICS

Performance

Requirement

The

503

tracks

the

492

tuned

input

frequency

from

100

kHz

GHz

OdBm±0

.5dB

steps

±0

for

each

change

Total error

over the 59

range

±2

±0

.75

from

100

kHz

GHz,

referred

100

MHz

±2

.25

from

100

kHz

GHz,

referred to

100

MHz

Supplemental

ormation

additional

attenuation

provided by the

front

panel

VAR

control

nominal,

VSWR

less

GHz

Typically

±2dB

or better

>110

<1 Hz

,10

same

492,

whichever

greater

Auxiliary

Output

Level

Spurious

Signals

(100

kHz-1

GHz)

Harmonic

Characteristic

Non-Harmonic



-40

better

with

respect

the

fundamental

Temperature

Range

Operating

Non-Operating

Altitude

Range

Operating

Non-Operating

Finish

Net Weight

Characteristic

Overall

Dimensions

Table

1-1

(cont)

Pertormance

Requirement

rms

minimum,

into

oad

-20

better

with

respect

the

fundamental

ENVIRONMENTAL

CHARACTERISTICS

Characteristic

Table

1-2

Table

1-3

PHYSICAL

CHARACTERISTICS

Anodized

aluminum

panel

and

chassis

Front

panel

faced

with

matt

plastic

Ibs

.64

kg)

General

Information

and

Specifications-TR

503

0 to

+50°

Description

-40

+75°

15,000

feet

50,000

feet

Descri

pti

Supplemental

ormati

.28in(134

.1mm)HX12in

.(304

.8mm)DX4

.96in(126mm)H

STANDARD

ACCESSORIES

Refer

tabbed

pullout

sheet

the end

the

ReplaceableMechanical

Parts

section

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