Tektronix 7L5 User manual

Tektronix.

COMMITTED

EXCELLENCE

PLEASE

CHECK

FOR

CHANGE

INFORMATION

THE

REAR

THIS

MANUAL.

7L5

SPECTRUM

ANALYZER

OPTIONS

INSTRUCTION

MANUAL

Tektronix,

Inc.

P.O.

Box

500

Beaverton,

Oregon

97077

Serial

Number

070-2155-03

FIRST

PRINTING

OCT

1976

Product

Group

Revised

JAN

1982

1976,

1977,

1978

Tektronix,

Inc.

All

rights

reserved.

Contents

this

publication

may

not

reproduced

any

form

without

the

written

permission

Tektronix,

Inc.

Products

Tektronix,

Inc.

and

its

subsidiaries

are

covered

U.S.

and

foreign patents

and/or

pending

patents.

TEKTRONIX,

TEK,

SCOPE-MOBILE,

and

are

registered

trademarks

Tektronix,

Inc.

TELEQUIP-

MENT

registered

trademark

Tektronix

U.K.

Limited.

Printed

U.S.A.

Specification

and

price

change

privileges

are

reserved.

—

7L5

Options

GENERAL

INFORMATION

INTRODUCTION

This

manual

contains

documentation

for

the

7L5

Spectrum

Analyzer

Options.

Each

complete

and

separate

section

supplement

the

manual.

Changes

and

corrective

information

are

added,

the

back

the

manual.

This

information

incorporated

into

the

respec-

tive

manual

text

and

diagrams

when

the

option

section

reprinted.

History

information

included

with

the

up-

dated

data.

Original

pages

are

identified

the

symbol

revised

pages

revision

date

the

lower

inside

corner

the

page.

These

options

add

assembly,

with

its

part

number;

the

7L5

instrument.

The

suffix

portion

the

part

number

signifies

updating

process

the

assembly.

Up-dated

manual

supplements

may

contain

information

that

not

applicable

your

instrument;

however

previously

stated,

the

manual

does

contain

history

infor-

mation.

Depending

the

production

model

the

7L5,

may

impractical

field

install

some

option

assemblies.

Contact

your

local

Tektronix

Field

Office

representative

for

information.

INSTALLATION

AND

REPACKAGING

Initial

Inspection

The

instrument

was

inspected

both

mechanically

and

electrically

before

shipment.

should

free

mars

scratches

and.

electrically

meet

exceed

all

specifications.

confirm

this,

inspect

the

instrument

for

physical

damage

that

may

have

occurred

transit

and

test

the

electrical

performance

following the

Operating

Instructions

and

Performance

Check

Procedure

the

section

applicable

the

Option.

there

damage,

the

instrument

does

not

perform,

contact

your

local

Tektronix

Field

Office

or representative.

Installation

These

options

are

normally

shipped

attached

the

7L5

and

ready

plug

into

the

7000-Series

mainframe.

the

option

shipped

field

modification

kit,

instructions

how

itis

installed

the

7L5

will

included

with

the

kit.

After

installation,

plug

the

7L5

with

option

into

7000-

Series

mainframe,

and

proceed

directed

the

’

Operations

section

this

manual.

(Both

Options

and

require

mainframe

with

readout.)

Repackaging

for

Shipment

Tektronix

instrument

shipped

Tektronix

Service

Center

for

service

replacement,

attach

tag

showing,

owner

(with

address)

and

the

name

individual

your

firm

that

can

contacted.

Include

complete

instrument

serial

number

and

description

the

service

required.

Save

for

re-use

the

shipping

container

your

instrument

was

shippedin.

the

original

packaging

not

available,

unfit

for

use,

repackage

follows:

Obtain

shipping

container

made

heavy

cor-

rugated

cardboard

wood

with

inside

dimensions

less

than

six

inches

than

the

instrument

dimensions;

this

will

allow

room

for

cushioning.

Refer

Table

for

carton

test

strength

requirements.

Wrap

the

instrument

heavy

paper

polyethylene

sheeting.

Protect

the

front

panel

with

urethane

foam

cardboard

strips.

Cushion

the

instrument

all

sides

tightly

packing

dunnage

urethane

foam

between

the

carton

and

the

instrument

allowing

three

inches

all

sides.

Seal the

carton

with

shipping

tape

industrial

stapler.

TABLE

Gross

Weight

(Ib)

Carton

Test

Strength

(Ib)

10-30

275

30-100

375

120-140

500

140-160

600

you

have

any

questions,

contact

your

local

Tektronix

Field

Office

representative.

—_

—

7L5

Option

7L5

OPTION

Log

Sweep

General

Information

IRIG

PROPORTIONAL

BANDWIDTH

SUBCARRIER

CHANNELS

The

7L5

Option

provides

the

additional

feature

LOWER

CENTER

UPPER

BAND

IRIG

logarithmic

frequency

span

(250

222

kHz)

LIMIT

FREQ

LIMIT

WIDTH

display.

Because

the

display

generated

from

three

CHANNEL

;

(CPS)

(CPS) (CPS)

(CPS)

sweeps,

covering

decade

frequency

each,

digital

storage

memory

operation

used.

Resolution

and

sweep

ere

ane

“

time

are

automatically

controlled

provide

amplitude

518

560

602

calibrated

display

for

the

data

acquisition

time.

Signal

675

730 785

110

acquisition

time

for

one

display

than

2.5

888

960

1,032

144

seconds.

Sweep

Inhibit

feature

will

store

and

display

any

1,202

1,300

1,398

196

full

span

log

display

until

SWP

INHIBIT

switched

off.

1,572

1,700

1,828

256

This

equivalent

single

sweep

operation.

2,127

2,300 2,473

346

2,775 3,000

D200

450

)

3,607

3,900 4,193

586

10 4,995

5,400

5,805

810

6,799

7,350

7,901

1,102

9,712

10,500 11,288

1,576

13,412

14,500

15,588

2,176

20,350

22,000

23,650

3,300

27,750

30,000

32,250

4,500

37,000

40,000 43,000

6,000

48,560

52,500 56,440

7,880

64,750 70,000

75,250

10,500

86,025

93,000

99,975

13,950

114,700 124,000 133,300

18,600

152,625

165,000

177,375

24,750

IRIG

graticule

overlay

provided

standard

accessory.

The

graticule

can be

inserted

over

the

face

the

crt

behind

the

crt

bezel.

The

following

table

lists

proportional

bandwidth

subcarrier

channels.

Sees

Ua,

bhwNnh

NSD

-00O

NWN

NOILdO

Option

Page

SECTION

TABLE

CONTENTS

SPECIFICATIONS

Electrical

Characteristics

Environmental

Characteristics

Accessories

OPERATING

AND

PERFORMANCE

CHECK

INSTRUCTIONS

Introduction

Function

Controls

and

Connectors

Operational

Check

Preliminary

Preparation

Check

Frequency

Range

and

Display

Flatness

Verify

Sweep

Inhibit

Operation

7L5

Option

Page

—_

oot

2-1

THE

FOLLOWING

SERVICING

INSTRUCTIONS

ARE

FOR

USE

QUALIFIED

PERSONNEL

ONLY.

AVOID

PERSONAL

INJURY,

DO NOT

PERFORM

ANY

SERVICING

OTHER

THAN

THAT

CONTAINED

OPERATING

INSTRUCTIONS

UNLESS

YOU ARE

QUALIFIED

SO.

SECTION

CALIBRATION

Equipment

Required

Preliminary

Preparation

Calibrate

the

Sweep

Span

kHz

Calibrate

the

Log

Sweep

Calibrate

Resolution

Bandwidth

CIRCUIT

DESCRIPTION

General

Detailed

Description

MAINTENANCE

INSTRUCTIONS

Introduction

Preparing

the

Instrument

for

Service

Replacing

the

Assembly

REPLACEABLE

ELECTRICAL

PARTS

DIAGRAMS

REPLACEABLE

MECHANICAL

PARTS

CHANGE

INFORMATION

3-1

4-1

Option

Page

—)J

—)

__]

Fig.

Option

21.

1-1.

7L5

Option

(Log

Sweep).

7L5

Option

REV.

FEB

1978

—J

—_J

__}

Section

1—7L5

Option

SPECIFICATIONS

ELECTRICAL

CHARACTERISTICS

The

following

characteristics

and

features

apply

the

Option

(Log

Display)

portion

the

7L5

Option

Spectrum

Analyzer.

7L5

characteristics

are

not

affected

this

option.

These

characteristics

are

applicable

over

the

environmental

specifications

criteria

for

the

7000-

Series

mainframe.

Frequency

Range

(Log

Display):

250

222.25

kHz,

increments

of;

250

Hz—2.25

kHz,

2.25

kHz—

22.25

kHz,

and

22.25

kHz—222.25

kHz.

Signal

aberration

(spread

overlap)

generated

the

crossover

points

(i.e.

2.25

kHz,

22.25

kHz,

etc.)

shall

not

exceed

0.5

minor

division.

Display

Flatness:

+0.5

dB,

—1.5dB

from

300

180

kHz.

Acquisition

Time/Full

Log

Display:

Not

than

2.5

seconds.

When

220

kHz

IRIG

(Log

Display)

on,

all

except

the

REFERENCE

LEVEL,

Display

Mode,

and

MAX

HOLD

selectors

the

7L5

are

disabled.

DOT

FREQUENCY

not

operational.

When

220

kHz

IRIG

(Log

Display)

off,

the

7L5

operation

normal.

When

SWP_

INHIBIT

enabled

(illuminated)

with

Log

Display,

sweep

operation

similar

single

sweep

mode.

Data

acquired

during

full

log

span

period,

stored

and

displayed

until

the

sweep

retriggered

switching

SWP

INHIBIT

off.

ENVIRONMENTAL

CHARACTERISTICS

previously

described, the

instrument

will

meet

the

electrical

characteristics

over

the

environmental

limits

the

7000-Series

mainframe.

Complete

details

test

procedure

are

described

the

mainframe

manual.

Operating

and

Storage

Requirements

Operating

Temperature

Range:

0°C

+55°C.

Storage

Temperature

Range:

—54°C

+75°C.

ACCESSORIES

Standard

Accessories

Manual,

Instruction

IRIG

Log

Graticule

for

7L5

Option

331-0421-00

Option

Page

1-1

—_]

Section

2—7L5

Option

OPERATING

AND

PERFORMANCE

CHECK

INSTRUCTIONS

Introduction

This

section

describes

the

function

front

panel

selectors

and

provides

operational

performance

check

procedure.

This

operational

check

can

used

verify

that

the

instrument

operating

satisfactory

and

will

serve

guide

for

incoming

inspection.

The

Option

assembly

provides

logarithmic

display

over

the

Inter

Range

Instrumentation

Group

(IRIG)

re-

quirements

for

the

frequency

range

250

222.25

kHz.

Log

display

front

panel

selectable.

Normal

linear

operation

the

7L5

unchanged

when

the

Option

off.

IRIG

graticule

overlay,

with

subcarrier

channels

noted,

standard

accessory.

Function

the

Panel

Selectors

Two

momentary

pushbutton

switches

illuminate

when

their

function

asserted.

220

kHz

IRIG:

Switches

the

spectrum

analyzer

span

toa

300

180

kHz

log

display.

When

on,

all

except

the

7L5

Reference

Level,

Display

Mode,

(Log-Lin)

and

Max

Hold

selectors

are

disabled.

Sweep

consists

three

segments

with

breakpoints

2.25

kHz

and

22.25

kHz.

When

off,

the

7L5

operation

normal.

SWP

INHIBIT:

When

activated

(illuminated)

the

instru-

ment

will

complete

full

log

display.

The

data

acquired

will

remain

stored

and

displayed

until

the

switch

pushed

again

change

the

state

off.

OPERATIONAL

CHECK

This

check

will

verify

that

the

Option

assembly

meets

the

electrical

charactersitics

specified.

Equipment

Required

Recommended

Test

equipment

specifications

are

the

minimum

re-

quired

for

these

checks.

Two

Sine

Wave

Signal

Generators:

Frequency

range

250

kHz.

Variable

output

level.

Output

impedance

600

TEKTRONIX

502

Oscillator

the

500

Series

Test

and

Measurement

instruments.

"L"-Series

plug-in

module

that

matches

the

source

impedance

the

signal

generator.

One,

BNC

"T"

Adapter:

Tektronix

Part

No.

103-

0030-00.

Preliminary

Preparation

Plug

the

7L5

Option

into

7000-Series

main-

frame

with

readout.

Install

"L"

series

plug-in

module

into

the

7L5.

(Plug-in

module

input

impedance

should

the

same

the

signal

generator

output

impedance.)

Turn

the

mainframe

power

and

allow

few

minutes

(about

warmup.

With

the

Log

Display

(220

kHz

IRIG)

off,

calibrate

the

7L5

span

and

position

the

display

described

the

7L5

Operating

instructions.

Check

Frequency

Range

and

Display

Flatness

Apply

the

output

from

two

signal

generators

through

BNC

"T"

connector

and

coaxial

cable

the

Input

the

7L5

plug-in

module.

Set the

frequency

one

generator

300

and

the

frequency

the

other

generator

180

kHz.

Adjust

the

output

level

both

generators

dBm.

Switch

the

7L5

Display

Mode

dB/DIV

and

the

220

kHz

IRIG

Log

Display

on.

Check—the

display

for

the

300

and

180

kHz

signals

within

+0.5,

—1.5

dB,

dBm.

Note

that

only

the

Display

Mode

and

Reference

Level

selectors

the

7L5

are

functional

when

the

Log

Display

active.

Verify

Sweep

Inhibit

Operation

Activate

the

sweep

inhibit

mode

pressing

the

SWP

INHIBIT

pushbutton.

Verify

that

the

sweep

locked

out,

the

comple-

tion of

one

sweep

changing

the

Display

Mode

dB/DIV

LIN

and

observe

that

the

display

does

not

change.

Option

Page

2-1

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