Tektronix 7L12 Manuel utilisateur

L~~

CTIO

ΜΑΝ

ΑΙ

070-1298-01

SPECTRUM

Serial

umber



tronix,

Inc

Box

500



Ao-



eaverton,

Orego

97005



one

644-0161

les

tronix

772

ARRANTY

All

TEKTRONIX

instruments

are

warrante

against

defective materials

workmanship

for

one

year

Any

uestions

with

res

ect

the

warranty

should

taken

with

your

TEKTRO

Field

Engineer

representative

All

requests

for

repairs

replacement

arts

should

directe

the

TEKTRONIX

Fiel

Office or

representative

your

area

This

will

assure

you

the

fastest

possible

service

lease

inclu

the

instrument

Type

umber

art

umber

and

Serial

Number

with

all

uests

for

parts

service

Specifications

rice

change

privileges

reserv

1972,

new

material

1973,

Tektronix,

Inc

Beaverton,

Oregon

Printed

the

United

States of

America

All

rights reser

Contents of

this

ublication

may

not

repro

duced

any

form

without

permission

tronix,

Inca

and

foreign

prod

ucts

covered

foreign

ate

and

/or

atents

ending

TEKTRONIX

registered

trademark

Tektronix,

BLE

TEN

CTIO



ecifications



age

Introduction

lectrical

acteristics



1-1

CTIO



erating

ctio

Introduction



2-1

Fun

ction

anel

Controls

and Connectors



2-1

eral

erati

mation



2-6

reliminary

nt Pan

Setu

Cali

ration



2-6

roce

atc

he71_12

Oscillosco

Cali

rati

Swee

2-6

and

ju st

og-Am

Cali

ratio

2-8

odeand

10 d

/Div

eration



2-9

ust

Contrast

aseline

Cli

atio

2-9

heAnalyzer

Signal

lication



2-9

esolution,

sitivity

uency

2-11

Gain

Desensitizatio



2-11

Selecti

Sweep

ate



2-11

Trigge

ing

he Dis

lay



2-12

How

Swee

he Disp

lay

sing

an E

xternal

Swee

Sou



2-13

xternal

Trigge

ation

sing

tical

lifie

Plug-in

nit

e Source



2-14

sing

Cal

Out

Sig

eference

Accurate F

ency

licatio



2-15

Applications



2-15

CTIO



erfo

mance

eliminary

aration



3-1

hec

/DI

nd L

Cali

ratio



3-1

hec

he F

Accuracy



3-1

hec

Gain

Selecto

Accuracy



3-2

eration

of the

deo

ilte

3-2

Sen

sitivity



3-2

or S

Sig

als

(

esi

ual

esponse)



3-4

esol

tion

Bandwi

and

hape F

actor



3-5

ental



3-6

e r

heck

equ

Test

Equ

ment

uire

3-7

Cali

rato

uency



3-8

Cali

brator



3-8

Atte

uato

Accuracy



3-9

Dis

lay

lat

ess



3-9

k Intermodu

latio

Disto

tio

3-10

ideo

rocesso

Ope

atio

3-10

Time/Div

Acc

acy

ange



3-11

Trigge

r i

Ope

ation

and Sen

sitivity



3-12

eck

orizo

tal

npu

oltage

equ

irement



3-13

k Fre

qSp

Accuracy

inea

ity



3-13

TABLE

CONTENTS

(cont)

SECTION4



Calibration

Procedure



Page

Equipment

Required



4-1

Time

Base

Section

Adjust

Sweep

Triggering



4-2

Check

and

Adjust

Timing



4-4

Function

Alignment

Adjust

LIN

Mode

Baseline Offset



4-5

Adjust Gain

Compensation

and

Reference

Level



4-5

Phase

Lock

Circuit

Phase

Lock

Adjustments



4-6

2nd

and

Shaper

Calibration

Adjust

2nd

Sweep

Shaper

Range

and

Center

Frequency



4-8

Adjust

Sweep

Shaper



4-9

Voltage

Memory

Circuit

Adjust Voltage

Memory

(Cal

and

Offset)



4-9

Calibrate

the

2nd

Mixer

and 2

.095

GHz

Filter



4-10

Freq

Span

and

Marker

Calibration

Adjust the

1st

Power

Supply

Voltage

and

the Freq

Span

the

Oscillator



4-11

Calibrate

MAX

SPAN

Marker



4-12

MHz

Calibrator

Adjust the

Calibrator

Output



4-13

Resolution

Adjust

Bandpass

the

105

MHz

Amplifier

and

300kHz

Filter



4-13

Adjust

the

Resolution

Gain

Leveling

Compensation



4-16

Preliminary

Adjustment

the Gain Slope For

the

Resolution

Amplifier



4-17

Adjust

the

Post

Resolution Amplifier

Gain



4-17

Minimize

Intermodulation

Products



4-18

SECTION5



Circuit

Description

Block

Diagram

Description



5-1

Detailed

Circuit

Description

Microwave

Input

Circuits



5-3

105

MHz

Amplifier,

3rd

Mixer

and

Oscillator



5-3

MHz

Amplifier

and

Resolution

Filter

Circuits



5-4

Sweep

Triggering



5-5

Sweep

Generators

and

Holdoff



5-5

Sweep

Span



5-5

YIG

Coil

Driver

and

Marker

Generator



5-5

Voltage

Memory

and

Phase

Lock

Operation



5-6

YIG

Oscillator

Power

Supply



5-6

Sweep

Shaper



5-6

Function

Amplifier



5-7

Video

Filter,

Processor, Baseline

Clipper

and

Vertical

Output



5-8

MHz

Calibrator



5-9

TABLE

CONTENTS

(cont)

SECTION6



Maintenance

Information



Page

Preventive

Maintenance

Cleaning



6-1

Lubrication



6-1

Transistor

and

Checks



6-1

Performance

Checksand

Recalibration

Troubleshooting



6-1

Troubleshooting

Aids



6-2

Corrective

Maintenance

Obtaining

Replacement

Parts



6-7

Soldering

Technique



6-7

Replacing

Square

Pin for the

Multi-pin

Connectors



6-7

Replacing

Assemblies

and

Sub-assemblies

Maintenance

Tools



6-7

Front

Panel

Potentiometers



6-8

Removing

and

Installing

Freq

Span/Resolution

Knobs



6-8

Replacing

Repairing

the

Cam

Switches



6-8

Replacing

the

Major

Circuit

Board

Assemblies



6-9

Replacing

the

2nd

Varactor

Assembly



6-10

Replacing

the

.095

GHz

Filter

Assembly



6-11

Replacing

the

1st

(YIG)

Oscillator

Assembly



6-11

Replacing

the

2nd

Mixer

Assembly

(Includes

Calibration

Procedure

after

Replacement)



6-12

Replacing

the

Phase

Detector

and 2nd

Hybrid

Assembly



6-14

Replacing

the

Differential

Attenuator

Assembly



6-14

SECTION



Electrical

Parts

List



7-1

SECTION



Diagrams and

Circuit

Board

Illustrations



8-1

SECTION9



Mechanical

Parts

List

and

Illustrations

(Exploded

View)



9-1

Fig

1-1

71-12

Spectrum

Analyzer

SPE

ICATIO

Section

1-7

Introduction



Sectio

Mec

anical

arts

ist,

Exp

lode

rawi

manual

contai

information

uired

operate,

Accessories

ovi

informatio

necessary

to or

re-

test,

cali

rate,

service

71_12

Spectrum

Analyzer



lacea

arts

art

ist

cross-reference

Electrical

manual

ivi

into

ten

sections

;



arts

ist

ded

drawi

ows

quence

assemb

entifie

d assemb

lies

Section

General

Information

Specifications

Section

eration

structions

Information

relative

installing

and

erating

stru

t .

Sectio

10,

Manual

anges

Correctio

rovi

istory

and

upd

ating

formatio

for

ual

form

inserts

ual

ate

ese

inse

are

incor

orate

into

man

text

and d

iagrams

Section

erformance

rovi

com

lete

roce

operatio

performance

for

in-



Description

ing

acce

tance

any ad

itional

performance

at re

uire test

ment

verify

instrument



The

Spectr

Analyzer

ual-wi

g-i

specificatio



nit,

for

7000-Series

Oscilloscopes

use

dwith

any

t h

ese oscilloscopes,

lays

pectrum

signal

ergy

wit

any

freque

ncy

an to

unit

con

tai

orizo

tal

sweep

timing

circuits,

fre-

Section

Calibration

roce

ure

Descri

es test



quency

time

omain

displays,

also

means

ment

set

p anda

ustment

roce

ures

uired

to align



exter

sweep

source

can

lie

slave

71_12

instru

ents

inter

stmen



exter

evices,

suc

ecor

Section

Circuit

Description

rovi

asic

and

general

circuit

analysis

may

useful

hen

servicing

erating

instr

Section

Mainte

ance

structions

Descri

routine

andco

rective

maintenance

roce

ures

wit

etaile

in-

structions

for

replacing

assemblies,

-assem

lies,

and

ivi

ual

com

onents

exp

ded

rawing

art

section

Trou

le-s

ooting

procedu

res

plus

general

infor-

mation

may

in servici

g t

instr

ments

are

also

rovide

Section

lectrical

arts

ist

rovi

information



uency

necessary

to or

replacea

arts

and

assemblies

ICATIO

ELE

ICA

ACT

ISTICS

following

aracteristics

features

71_12

Spectrum

alyzer

are

applica

after

warm

minutes

Center

requency

Operating

angean

Acc

racy

From

dout

accuracy

with

± (10

1°/

dial

rea

Cali

rate

steps,

1-2-5

sequence,

from

500

Ητ

/Div to

100

z/Div

Accuracy

wit

pan

selecte

earity

wit

5%,

over

center

ivisions

Section

Diagrams

rovi

functional

loc

iag



division d

lay

and d

etaile

circuit

ematics

ictoral

layout

rawings,

assembly,

-assem

ly,

com

onent

loca

tio

n s

are

locate

ace

iagram

(us

ally



Two

ditio

ositio

MAX

provi

bac

rece

ing

diagram



age)

aveforms and

ap

roximately

(180

z/Div) of

span,

fixed

voltage

ata,

for

trou

les

ooti

circuit

analysis,

also



fre

uency

operation,

for

time

domain

lay

provi

acent

to or

iagram



con

sly

varia

between

steps

Specifications-71_12

Dis

lay

latness



esolution

±1

over

any

selecte

frequency

pan

with

ect



ive

resolutio

and

selections

from

300

he d

lay

level at



eca

steps,

are

rovide

dwid

accuracy,

level,

wit

20%

resolution

selecte

hap

factor

over

level

Dis

lay



etter

(see

3-4)

Signal

level

ge over

five

10 d

/DI

rovi

cali

rate

dB d

ynamic



band

less

range



Accuracy



wit

1

/10

maxim

over

ynamic

range



Sensitivity

Signal

oise

Twice

noise

vertical

(see

/DI

rovides

cali

rate

ynamic



3-2)

followi

sensitivity

characteristics

apply

range

Accuracy

wit

±0

maximum



Sensitivity

may

ecrease

grad

ally

over

range



rovi

linear

isplay

wit

10%,

over



Sig

evel



esolution

dwi

graticule

eig

-115



300

-108



eference

evel



-100



-90



Calibrate

levels

eca

ste

from

-100



-80



+30



wit

±2



clu

attenuator

and

gain

switc

ing

effects

hen

two

are

not

off-setting

eac

efere

level

eviation

etween

isplay

modes

;



IntermO

ulat

Distortion

(See

Fig

3-6)

less

from

2 dB

/DI

to 10

/DI

and

less

han



ird

order

n70

from

two

-30

ivision

from

/DI

ote

eviation



signals

wit

any

fre

quency

a n

Seco

own

function

t h e

oscilloscope

vertical

linearity



from

two-40

signals

Calibrator



urious

Signals F

rom

Internal

Sources

MHz

±0

.01%

wit

han

absol

amplitu

level

-30

±0

dB,

Attenuator

(

esi

esponse)

ual

to or

less

t h

-100

Bm,

referre

1st

mixer

Cali

rated

ste

Accuracy

;

±0

Inci

ental

(See

3-5)

rea

ing,

ever

greater



200

(P-P)

maximum,

hen ph

ase loc

(P-P)

maximum

secon

of ph

ase

loc

Gain

selector positio

ered

blue

sector,

Stability

rovide

ange,

steps,

for

/DI



over



erio

fixe

lay

mode

ese

four,

lus

r a

ditio

ositions,



tempe

re,

ase loc

100

hen not

rovi

70 d

gain

ange

for

/DI

and



ase

loc

over

perio

fixe

tem

erat

isplays

Accuracy



with

±1 d

/10

step

total



Maximum

ower

Level

±1

BLE

control

its

etent



inear

ation-

attenuator

;

-30

Safe

levels-

atten

ator

;

+13



BLE



control,

wit

roximately

10d13



atte

uator

;

+30

average,

200

)

ge,

provides

continuo

gain

ustment

etwee

eac



NOTE

ese are

nput

levels

1st

mixer and

calibrate

step



power

rating

atte

uator

Sweep

Rate



SINGLE

WEEP

mode

Sweep

automatically

recurs

Calibrate

sweeps,

from

10 ms/Div

(SPECTRUM

posi-



the

end

sweep

holdoff

time

the

FREE

RUN

tion)

s/Div (within

2°/

are

provided

1-2-5

uence

ARIABLE

control

rovides

continuous

vari-



Vertical

Connector

ation

between

steps

When

the

ΤΙΜΕ

/DIV

selector

the



rovides

±5°/

deo

signal

per

isplayed

ivision,

SPECTRUM

position,

the

ange

the

ARIABLE

control



about



the



CRT



vertical



center



Source

ance



increase

proximately

100

allowing

the

Time/Div



app

roximately

maximum

offset

may

increased

about

s/Div



intro

duced by

error

rom

the

mainframe

vertical

centering

interface

Triggering

Specifications-7L12

Signal

source

coup

from

either

the

vertical

orizontal

Input

Connector

amplifier

channels

the

ower

line

Frequency

range



uires

±1

signal,

with

starting

reference

approximately

15 Hz

MHz

Sensitivities

for

trig-



±1

from

low

impe

ance

(300

less)

source,

gered

modes

are

division

for

the

AUTO



normalize



the



external



sweep



voltage



the



7L12

division

for the

ORM

division

for



frequency

span

Autres manuels pour 7L12

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