Tektronix FG501 Bedienungsanleitung

Andere Handbücher für FG501

2

Andere Tektronix Tragbarer Generator Handbücher

Tektronix

Tektronix FG501 Bedienungsanleitung

Tektronix

Tektronix FG501 Bedienungsanleitung

Tektronix

Tektronix AWG7000 Series Gebrauchs- und Pflegehandbuch

Tektronix

Tektronix AWG5200 Series Gebrauchs- und Pflegehandbuch

Tektronix

Tektronix AWG 2021 Bedienungsanleitung

Tektronix

Tektronix AFG2000 Bedienungsanleitung

Tektronix

Tektronix TLA7PG2 Bedienungsanleitung

Tektronix

Tektronix AFG3000 Series Gebrauchs- und Pflegehandbuch

Tektronix

Tektronix FG501A Bedienungsanleitung

Tektronix

Tektronix AWG5012 Bedienungsanleitung

Tektronix

Tektronix TG700 Gebrauchs- und Pflegehandbuch

Tektronix

Tektronix AFG3000 Series Handbuch

Tektronix

Tektronix AFG31000 Series Bedienungsanleitung

Tektronix

Tektronix CFG253 Handbuch

Tektronix

Tektronix TG8000 Bedienungsanleitung

Tektronix

Tektronix AWG5200 Series Gebrauchs- und Pflegehandbuch

Tektronix

Tektronix TG700 Bedienungsanleitung

Tektronix

Tektronix DG2040 Bedienungsanleitung

Tektronix

Tektronix PPG3000 Series Bedienungsanleitung

Tektronix

Tektronix VITS 200 Bedienungsanleitung

Tektronix

Tektronix AWG7000 Series Handbuch

Tektronix

Tektronix 106 Produkthandbuch

Tektronix

Tektronix Tektronix SPG8000 Gebrauchs- und Pflegehandbuch

Tektronix

Tektronix ECO422D Handbuch

Beliebte Tragbarer Generator Handbücher anderer Marken

Kohler

Kohler 20EORZ Bedienungsanleitung

Powerhorse

Powerhorse 83171 Bedienungsanleitung

HURST

HURST ML-630-SI Bedienungsanleitung

ETQ

ETQ TG4000 Bedienungsanleitung

Briggs & Stratton

Briggs & Stratton 40265 Einrichtungshandbuch

ConMed

ConMed 7550 Bedienungsanleitung

Owon

Owon Waveform Generator Bedienungsanleitung

evertz

evertz 7700 Series Bedienungsanleitung

Power Stroke

Power Stroke PS906025 Bedienungsanleitung

Firefly

Firefly Cygnus CYG2400/460/24 Bedienungsanleitung

Draper

Draper PG950S Firmware-Update

PowerBoss

PowerBoss PowerBoss Bedienungsanleitung

SDMO

SDMO SH 4000 Bedienungsanleitung

EINHELL

EINHELL STE 5500 Bedienungsanleitung

Wanco

Wanco WI3000P Bedienungsanleitung

Full Boar

Full Boar FBT-3300 Bedienungsanleitung

Dwyer Instruments

Dwyer Instruments ASG Bedienungsanleitung

Westinghouse

Westinghouse WH1000i Series Bedienungsanleitung

......



......



.....



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

........

070-1431-01

Te

k

tro

nb

c

CO

M

M

ITT

E

D

TO

E

XC

E

LLE

N

C

E

FUNCTION

GENERATOR

1

INSTRUCTION

M

ANUAL

Te

k

tro

n

i

x

,

Inc

.

Ρ

.

Ο

.

Box

500

B

eaverto

n

,

Orego

n

97077



Serial

N

u

m

ber

F

irst

p

ri

n

ti

ng

A

ug

u

st

Ι

972

nearest

Tektron

timber

r

is

warranted

against

detecfit

"c

meAc'

-

iw

.i

and

rmal

use,

for a

nix

will

repair

or replace,

at

its

op

termined

to

be

defecUve

within

the

wana

ix

Servicx?

!^

ι

;υ

,

vvorkt

iniflal

shipment,

produccis

de

avd

rv-

?

urnpd,

freight

prepaid

.,

to

fitness

wof

I

01i

Y



V%



k1i

Please

direct

all

requests

for

service

or

replacement

parts

to

the

nter or Field

Office,

include

the

type

or

product

and

its

serial

number

.

Copyright

-)

197

2

,

1978 by

Tektronix

.

reserved

.

Contents

of this

publication

may

not

be

duced

in

any

form

without

the

permissio

ektronix,

I

Products

of

Tektronix,

inc

.

and

its

subsidiaries

ar

;

a

covered

by

U

.S

.

and

foreign

patents

and/or

pending

patents

.

TEKTRONIX,

TEK,

SCOPE-MOBILE,

TELEQWPMENT,

and



are

registered

trademarks

of

Tektronix,

Inc

.

Printed

in

U

.S

.A

.

Specification

and

price

change

privNeges

are

reserved

.

TABLE

Ο

F

CO

N

T

EN

TS

S

E

CTIO

N

1

S

E

CTIO

N 2

W

A

RN

ING

,

THE

FO

LL

O

W

I

NG S

ERV

ICI

N

G

I

N

ST

RU

CTIO

N

S

AR

EF

OR

U

SE

BY

Q

U

A

L

I

F

I

E

D

PER-

SO

NNEL

O

NL

Y

.

T

O

AV

OID

PER

SO

N

A

L

I

NJUR

Y,

DO

NOT

PERFO

RM

ANY

S

ERV

ICI

N

G

OT

HER

THAN THAT

CO

N

TAI

NE

D

IN

OPER

ATI

NG

I

N

ST

RU

CTIO

N

S

UNLE

SS

YO

U

A

RE

QUA

L

I

F

I

ED

TO

DO

SO

.

C

HA

N

G

E

I

NF

O

RM

ATIO

N

SE

CTIO

N

3

AD

JUST

MEN

T

3-1

SE

CTIO

N

4

M

AI

NT

EN

A

N

C

E

AND

I

NT

ERF

ACI

NG

I

NF

O

RM

ATION

4-1

SE

CTIO

N

5

CI

R

CU

IT

D

E

SC

R

I

P

TIO

N

5-1

SE

CTIO

N

6

O

P

TIO

N

S

6-1

SE

CTIO

N

7

REPL

AC

E

A

BLE ELE

CT

R

ICA

L P

A

R

TS

7-1

S

E

CTIO

N 8

DIAG

RA

M

A

ND

CI

R

CU

IT

B

OA

RD

I

LLU

ST

R

ATIO

N

8-1

SE

CTIO

N9

REPL

AC

E

A

BLE

ME

CHAN

ICA

L P

A

R

TS

A

N

D

E

X

PL

OD

E

D

V

IE

W

9-1

,.

P

age

O

PER

ATI

N

G

I

N

ST

RU

CTIO

N

S

1-1

S

PE

CI

F

ICATIO

N

AND

PERF

O

RM

ANC

E

C

HE

C

K

2-1

Fig

.

1-1

.

FG

501 Function

Generator

I

N

T

R

OD

U

CTIO

N

Th

e F

G

501 Function

Generator

is

designed

to

op

erate

i

nα

TM

500-Series

p

ower

mo

d

ule

.

L

ow

d

istortion

si

n

e,

s

q

uare,

triangle,

pulse,

an

d

ramp

waveformsfrom

0

.001

Hz

to

1

MH

z as

well

as

α

+2,5

volt

sq

uare-wave

trigger

are

available

at

t

he

front

p

an

el

.

V

ariable

DC

offset

of

±7

.5

volts

is

also

p

rovide

d

.

Α

"h

ol

d

"

feature

allows

t

he

ge

n

erator

outp

ut to

be

abru

p

tly

h

alted

at

its

instantaneous

voltage

level

an

d

h

el

d

t

here un

til

ma

n

ually

switc

h

ed on

again

.

Α

voltage-controlle

d

fre

q

uency

(V

C

F) in

p

ut is

provi

d

ed

to

control

t

h

e

out

p

ut

fre

quency

from

an

exter

n

al

voltage

source

.

T

he outp

ut

fre

quency

can

be

swe

p

t

above

or

below

t

h

e

selecte

d

fre

q

ue

ncy

to

α

maxim

u

m

of

1000

:1

de

pe

nd

ing

on

t

he

polarity

and

am

p

litu

d

e

of

t

he

V

C

F

i

n

put

an

d

t

h

e

selecte

d

output

frequency

.

Also

inclu

d

ed

is

an

exter

n

al

gate

in

p

ut

t

h

at

allows

t

he

generator

to

be

tur

n

ed on

for

t

h

e

d

uration

of

an

externally

ap

p

lie

d

gating

signal

.

T

h

is

mo

d

e

p

rovi

des

eit

h

er

α

single

cycle

outp

ut

or

α

train

(burst)

of

p

reselected

waveforms

dependi

n

g

on

t

he

gating

sig

n

al

width an

d

t

he

ge

n

erator

fre

q

uency

setti

n

g

.

T

he

p

h

ase

(start level)

of

t

he

waveform

burst

can be

varie

d

±90°

b

yα

fro

n

t-

p

an

el

con

trol

.

T

he

variety

of

swe

p

t

a

n

d

mo

d

ulate

d

signals

available

from

t

he

F

G

501

ma

ke

it

es

p

ecially

usef

u

l

for

suc

h

ap

p

lications

as

testing

servo-system

or

amplifier

res

p

onse,

distortio

n

,

and

stability

;

FM

ge

n

eratio

n

an

d

fre

q

uency

multiplicatio

n

;

or

sim

p

ly

u

sed

as

α

variable

beat-fre

q

ue

ncy

oscillator,

re

p

etitio

n

-rate,

o

r

tone-burst

ge

n

erator

.

T

h

e

sq

uare-wave

trigger

outp

ut

ca

n

be

use

d

as

α

source

for

tra

n

sistor-tra

n

sistor

logic

(TT

L

)

or

to

syn-

ch

ro

n

ize

an

exter

n

al

device such as

an

oscilloscope

or

counter

.

T

h

e

F

G

501

is

calibrated

a

nd

ready

for

use

w

h

en

received

.

It

is

design

ed

to

op

erate

in

any

compartment

of

α

TM

500-Series

power

module

only

.

R

efer to

t

he

p

ower

mo

d

ule

I

n

st

r

uctio

n

Manual

for

line

voltage

re

q

ui

r

eme

n

ts

a

nd

power

mo

d

ule

operatio

n

.

REV

.

C

JUL

197

8

OPERATING

I

N

ST

RU

CTIO

N

S

Installation

an

dR

emoval

Sectio

n

1-

F

G

501

Turn

t

he

p

ower

mo

d

ule

off

before

inserting

t

h

e

plug-

in

;

otherwise,

d

amage

may

occu

r

to

t

h

e

plug-in

c

ί

rcuitry

.

B

ecause

of

t

h

ehigh cu

r

rent

drawn

by

t

he

FG

501,

it

is

also

r

ecommen

d

e

d

th

at

t

he

p

owe

r

mo

d

ule

be turned

off

before

removing

t

h

e

FG

501

.

R

efer

to

Fig

.

1-2

.

C

h

ec

k

to

see

th

at

t

he

plastic

barriers

on

t

h

e

interconnecting

jac

k

of

t

h

e

selecte

d

p

ower

module

compa

r

tment

matc

h

th

e

cut-outs

in

t

he

F

G

501

circuit

board

edge

connector

.

Align

t

h

e F

G

501

ch

assis

wit

h

t

he

upper

a

nd

lower

guides

of

t

h

e

selected

com

p

artme

n

t

.

P

ush

t

h

e

mo

d

ule

in

a

nd

p

ress firmly

to

seat

t

he

circuit

board

in

t

he

inter-

connecting

j

ac

k

.

Pull

t

he

P

ower

switc

h

on

t

h

e

fro

n

t

p

anel

of

t

he

p

ower

module

to

apply

p

ower

to

t

h

e F

G

501

.

Observe

t

h

at

t

h

e

P

O

WER

indicator

lig

h

t

on

t

he F

G

501

comes

on

.

R

emove

t

he F

G

501

from

t

he

power

mo

d

ule

by p

ulli

ng

t

he

release

latc

h

at

t

he

bottom

of

t

he

fro

n

t

pa

n

el

a

nd

sliding

t

he

unit

straig

h

t

out

of

t

he p

ower

module

.

F

ig

.

1-2

.

P

l

u

g-i

n

i

n

stallatio

na

nd

r

emoval

.

O

p

e

r

ating

I

n

st

ru

ctions-

F

G

501

O

PER

ATI

N

G

CON

SID

ER

ATIO

N

S

ΝΟΤΕ

Befo

r

e

using

t

h

e

FG

501

fo

r

t

h

e

first

time,

r

ead

t

he

Operati

n

g

Co

n

siderations

in

t

h

is

section

an

d

t

he

d

esc

r

i

p

tion

of

t

he

f

r

ont-panel

controls,

connectors,

and

indicators

i

n

F

ig

.

1-3

.

Out

p

ut

Con

n

ections

T

he

output

of

t

he

F

G

501

is

designed

to

operate

as α

voltage

source

in

series

wit

h

50

Ω

and

wor

k

i

ng

i

n

to

α50

Ω

load

.

At

t

h

e

h

ig

h

er

f

r

e

qu

encies,

an un

te

r

mi n

ated

or

im

p

roperly

termi

n

ated

output

will

ca

u

se

excessive

a

b

erratio

n

s

on

t

he outp

ut

waveform

(see

Impe

d

ance

M

atc

hing

disc

u

ssion)

.

L

oa

d

s

less

than 50

Ω

will

re

d

ucet

he

waveform

am

p

litude

.

E

xcessive

distortion or

a

b

errations

due

to

imp

r

op

er

terminatio

n

is

less

li

k

ely

to

occur

at

t

he

lower

fre

q

ue

n

cies

(especially

wit

h

sine

an

d

tria

n

gle

waveforms)

.

H

oweve

r

,

to

en

sure

t

h

at

waveform pu

r

ity

is

preserve

d

,

observe

t

he

following precautio

ns

:

1

.

U

se q

uality

50

Ω

coaxial

cables and

con

n

ectors

.

2

.



M

a

k

e

all

con

n

ectio

n

s

tig

h

t

a

nd as s

h

ort

as

p

ossible

.

3

.

Use q

uality

atte

nu

ators,

if

necessa

r

y,

to

red

u

ce

waveform

am

p

litude

to

sensitive

ci

r

cuits

.

4

.

U

se

termi

n

ators

or

im

p

edance-matc

h

i

n

g

devices

to

avoid

reflectio

n

s

w

h

e

n

usi

ng long ca

b

les,

i

.e

.,

six

feet or

more

.

5

.

E

nsure

t

h

at

atte

n

uators,

termi

n

ations,

etc

.

h

ave

ad

e

qu

ate

power-

h

andli

ng capa

b

ilities

for

t

he output

waveform

(a

pp

roximately

0

.5

W

into

α

50

Ω

load)

.

P

ower

o

u

tput

is

determine

d

by

t

he

selecte

d

waveform,

its

am

p

litude,

a

nd

t

h

e

amou

n

t

of

offset

voltage

selected

.

T

he p h

ysical

a

nd

electrical

ch

aracteristics

of

t

he pu

lse-

tra

n

smitti

n

g

cable d

etermi

ne

t

h

e ch

aracteristic

im-

pedance,

velocity of

prop

agatio

n

,

and

amou

n

t

of

sig

n

al

loss

.

Signal

loss,

d

ue

to

en

ergy

d

issipatio

n

i

nth

e

ca

b

le

dielectric,

is

p

ro

p

o

r

tio

n

al

to

t

h

e

fre

q

ue

n

cy

;

t

h

erefore,

α

few

feet

of

ca

b

le

can

atte

n

uate

h

ig

h

-freque

ncy

i

n

forma-

tio

n

in

α

fEkst-rise

p

ulse

.

It

is

importantto

k

eept

h

ese

cables

as sh

ort

as

possible

.

Wh

en

signal

com

p

arison

measurements

or time

difference

determinatio

ns

are

made,

t

h

e

two

signals

from

t

he

test

device

s

h

o

u

ld

travel

t

h

roug

h

coaxial

cables

wit

h

identical

loss

and

time-d

elay

c

h

aracteristics

.

If

t

here

is

α

d

o

voltageacross

t

h

eoutput

load,

t

h

e

output

p

ulse

am

p

litu

d

e

will

be

compressed

;

or

in

some

cases,

if

t

he

voltage

excee

d

s

±10

V,

it

may

sh

ort

t

heoutput

.

To

preven

t t

h

is

from

occurring,

t

h

e

output

must

b

e

coupled

t

h

roug

hα

do

b

loc

king cap

acitor to

t

h

e

loa

d

.

The

time

con

sta

n

t

of

t

he

cou

p

li

n

g

ca

p

acitor

an

d

loa

d

must be

lo

n

g

eno

ug h

to

maintai

n

p

ulse

flat

ness

.

R

isetime

and

Falltime

If

t

h

e

out

p

ut

pulse

from

t

h

e

F

G

501

is

use

d

for

measuri

ng

t

he

r

ise

or

falltime

of

α

d

evice,

t

h

e

risetime

ch

aracteristics

of

associate

d

eq

ui

p

me

n

t

may

h

ave

to

be

considered

.

If

t

he

risetime

of

t

he device un

der

test

is

at

least

10 times

greater

t

han

t

he

combine

d

risetimes

of

t

he

F

G

501

plus

t

he monitoring

oscilloscope

a

nd

associate

d

cables,

t

h

e

error

i

n

troduced

will

n

ot

exceed

1

ο/ο

an

d

generally

can

be ignored

.

If

t

he

rise

or

falltime

of

t

he

test

device,

h

owever,

is

less

t

han 10 times as long as

t

he

combi

ned

risetimes

of

t

h

e

testi

ng

system,

t

h

e

actual

risetime

of

t

he device

will

h

ave

to

b

e

d

eterminedfrom

t

h

e

risetime

of

eac

h compone

n

t

ma

k

i

ng up

t

h

e

system

.

T

h

is

equals

t

he s

q

uare

root

of

t

he

sum

of

t

he sq

uares

of

t

h

e

i

n

divi

d

ual

risetimes

.

Co

n

versely,t

herisetimeoft

h

edevice

under

test

can

be

found

from

t

h

e

same

relations

h

ip

if

all

t

he

actual risetimes

in

t

h

e

system

are

kn

own

except

t

h

at

of

t

he device

under

test

.

Im

p

edance

M

atc

h

i

ng

R

eflectio

n

s

.

As

α

pu

lse

travels

d

own

α

tra

nsmission

line,

eac

h

time

it

encou

n

ters

α

mismatc

h

,

or

an im p

eda

n

ce

differe

n

t t

han

t

he transmission

li

n

e,

α

r

eflection

is

generate

da

nd

sent

backalon

g

t

he

line

to

t

he

source

.

T

he

amplitude

and

p

olarity

of

t

he

reflectio

ns are

d

etermi

n

ed

b

y

t

he

amount

of

t

h

e

encountere

d

impedance

i

n

relatio

n

to

t

he ch

aracteristic

im

p

edance

of

t

he ca

b

le

.

If

t

he

mismatc

h im

p

edance

is

h

ig

h

er

t

han

t

h

e

line,

t

h

e

reflectio

n

will

be

of

t

h

e

same

p

olarity

as

t

h

e

applied

sig

n

al

;

if

it

is

lower,

t

h

e

reflection

will

b

e

of

o

p

posite

p

ola

r

ity

.

If

t

h

e

reflecte

d

signal

retur

ns before

t

h

e

pulse

is

en

d

ed,

it

ad

ds

to or

subtracts

from

t

h

e

am

p

lit

u

de

of

t

hepulse

.

Th

is

distorts

t

he p

ulse

s

h

ape

a

nd

amplitude

.

M

atc

h

ing

N

etwor

ks

.

T

he

following

d

escribes

met

h

ods

for

matc

h

ing

impedance

networ

k

s

i

n

to

relatively

low

impedances

.

If

t

h

e

F

G

501

is

d

rivi

ng α

h

ig

h

impe

d

ance,

suc

h as

t

he

1

ΜΩ

i

np

ut

impedance

of

t

h

e

vertical

inpu

t

for

an

oscilloscope,

t

h

e

transmissio

n

line

must be

termi

n

ate

d

REV

.

Β

JUL

197

8

Selects

sine,

triangle,

square,

ramp,

and

pulse

output

waveforms

.

Pulse

and

ramp

waveform

duration

is

1/2f

.

See

Operating

Con-

siderations

for

addi-

tional

information

.

Concentric

with

OFF-

SET

control

.

Varies

am-

plitude

of

waveform

at

the

OUTPUT

connector

from

less

than

500

mV

(fully

ccw)

to

20 V

p-p

open

circuit

(

S N

B130000-up)

.

For

SN

below

8130000,

con-

trol

is

label

OUTPUT

and

provides

a

maximum

of

15

V

p-p

open

circuit

.

REV

C,

MAR

197

9

FUNCTION

Selector

AMPL

Control

OFFSET

Control

Concentric

with

AMPL

contrN

.

For

S

N

13130000-up,

control

pullout

provides a

var-

able

dc

offset

voltage

from

zero

(centered)

to

either

--

7

.5

V

(fully

cew)

or



+7

.5

V

(fully

cw)

.

When

pushed

in

pro-

vides

zero

off-set,

For S

N

below

B130000

control

does

not

pull

out

and

offset

limits

are

-

5

V

to

+5 V

.

PHASE

Control

When

pulled

out provides

continuously

variable

selection

of the

gated

output

waveform

start

level

(phase)

from

+90

0

(fully

ccw)

to

-90

0

(fully

cw)

referenced

to

the

sine

or

triangle

waveform

0

0

starting

point

.

Used

in

conjunction

with

the

GATE

INPUT

connector

when

operating

in

gated

output

(burst)

mode

.

TRIG

OUTPUT

Connector

Bs

m

connector

that

pre

vides

a

+2

.5

V

square-

wave

trigger

output

into

a

600

0

load,

OUTPUT

Connector

Bnc

connector

that

pro-

vides

the output

wave-

form

selected

by the

FUNCTION

selector,

POWER

Indicator

GATE

INPUT

Connector

A

brie

connector

for

applying

a

+2

V

to

+15

V

gating

signal to

the

generator

.

Fig

.

1-3

.

Operating

controls

and

connectors

.

when

power

is

ap-

the

FG

501

.

Operating Instructions-FG

501

FREQUENCY

Hz

Dial

The frequency

of

sine,

triangle

and

square

waveforms

is

the

dial

reading

times

multiplier

.

Ramp

arid

pulse

wave-

forms

have

a

frequency

approximately

1

.6X

dial

setting

times

multiplier

with the

MULTIPLIER

at

1

or

above

and

a

fre-

quency

of

approximately

2X

dial

setting

on

the

three

lowest ranges

of

the

MULTIPLIER

selec-

tor

.

Provides

vernier

selec-

tion of

output

frequency

from

the

fully cow

(calibrated)

position

to

approximately

0

.35%

of

full

scale

in

the

fully

ccw

position

.

MULTIPLIER

Selector

Selects

frequency range

in

9

decade

steps

and

provides

three

"hold"

positions

(between

the

lowest

three

multiplier

positions)

that

hold

the

generator

output

at

any

desired

instantaneous

voltage

level

.

Bnc

connector

for

apply-

ing

an

external

voltage

for

controlling

the

output

frequency

o

f

the

generator

.

A

10

V

input

provides a

frequency

range

of

1000

:

1

.

1431-13A

O

perating

Instructions-FG

501

into

α

50

Ω

attenuator

and

α

50

Ω

termination

at

the

oscilloscope

input

.

The

attenuator

isolates

the

input

capacity

of

the device

.

Distortion

can

be

caused

by

this

input

capacity

.

Α

simple

resistive

impedance-matching

n

etwork

t

hat

p

rovides

minimum

attenuation

is

illustrated

in

F

ig

.

1-4

.

To

match

impedance

with

t

he

illustrated

network,

the

follow-

i

n

g

co

n

ditio

ns

must

exist

:

and

Th

erefore

:

(R,

+

Ζτ

)

R

τ

m

u

st

eq

ual

Ζ

,

R

,+

Ζτ

+

R

z

R,

+



Z,

R

2



must

equal Ζτ

Z,+

R

z

R

ι

R

z

=

ΖιΖ

z

;

and

R

ιΖι

=

R

z

(

Ζτ

-

Ζ

I

)

or

R

ι

=



Ζτ

(

Ζτ

-

Ζι

)

and

R

z

=

Ζι

-

\

Ι



Ζ

2

Ζ

_

τ

Ζ

,

F

or

exam

p

le

;

to

matc

hα50

Ω

system

to

α

125

Ω

system,

Ζ

,

eq

uals

50

Ω

a

n

d

Ζ

2

eq

uals

125

Ω

.

Th

erefore

:

R,=-\/i25-(125-50)

=96

.80

an

dR

2

=

50



125

25

50

-

64

.6

Ω

Wh

en

co

n

structi

n

g

suc

h

α

d

evice,

t

h

e

environme

n

t

surrounding

t

h

e

compo

nents

s

h

ould

also

b

e

design

ed

to

provide α

transition

b

etwee

n

t

he im

p

edan

ces

.

K

eep

in

mind

t

h

at

t

h

e

c

h

a

r

acteristic

im

p

eda

n

ce

of

α

coaxial

d

evice

is

determined

by

t

he

ratio

b

etwee

n

t

h

e

outsi

de diameter

of

t

h

e

in

ne

r

conductor

to

t

h

e

i

n

si

de

d

iameter

of

t

he

outer

cond

uctor

.

τ

ο

=

138/

ε

log,o

D/d,

w

here

D

is

t

h

e

i

n

side

diameter

of

t

h

e outer

con

d

uctor,

a

n

d d

is

t

he outside

diameter

of

t

he

in

ne

r

conductor

.

ε

is

t

h

e

dielectric

co

n

s-

tant

(1 in

air)

.

Attenuation

R

atios

.

Th

o

u

g

h

t

he

networ

k

i

n F

ig

.

1-4

provi

d

es mi

n

imum

atte

n

uatio

n fo

r

αpu

r

ely

resistive

im pe

d

a

n

ce-matc

h

i

n

g

d

evice,

t

h

e

atte

nu

atio

nas seen

from

o

ne

end

does

not eq

ual

t

h

at

see

n

from

t

he

ot

he

r

en

d

.

Α

signal

(

Ε

,)

ap

p

lied

from

t

h

e

lower

impeda

n

ce

sou

r

ce

(

Ζ

,)

en

cou

n

ters

α

voltage

atte

n

uation

(

Αι

)

w

h

ic

h

is

g

r

eater

t

han

1

an

d

less

t

han

2,

as

follows

:

Α

,

=Ez =

Ζτ

+

1

Fig

.

1-4

.

I

mp

edance-match

i

ng

n

etwor

kth

at pr

ovi

d

es

m

i

n

im

um

attenuatio

n

.

Α

sig

n

al

(

Ε

2)

app

lied

from

t

he

h

ig

h

er

im

ped

an

ce

source

(

Ζ

2)

en

cou

n

ters

α

greater

voltage

atten

u

atio

n

(

Α

2)

wh

ic

h

is

greater

t

han

1

a

nd

less

t

h

an

2

(Z2/Z,)

:

_

Ετ

__

R'

+

R'



+

1

Az

=



Ε

ι



Rz



_EL

In

t

h

e

example

of

matc

hing 50

Ω

to

125

Ω

.

Α

'



925

+1=1

.77

Α

2

=

96

.8

+

96

.8

+

1

=

4

.44

64

.6

50

T

he

illustrated

n

etwor

k

can

b

e

mo

d

ified

to

p

rovide

different

attenuatio

n

ratios

by

ad

d

i

ng anot

h

er

resistor

(less

t

han

R,)

betwee

n

Ζ

,

an

d

t

h

e

j

un

ctio

n

of

R,

an

dR

z

.

Duratio

n

of

R

amps

and

P

ulses

Th

ed

uration

of

ramp

an

d

p

u

lse

waveforms

is

always

eq

ual

to

t

he h

alf-cycle

time

of

t

h

e

sine,

square,

or

triangle

waveform

freque

n

cy

.

For

MUL

TI

PL

I

ER

setti

n

gs

of

1

or

greater,

t

he

retrace/off

time

is

suc

h

t

h

at

t

h

e

waveform

h

as

αdu

ty

cycle

of

approximately

80

ο

/

ο, i

.e

.,

fre

quen

cy

equals

a

pp

roximately

1

.6

Χ

FRE

Q

UEN

CY

Hz

dial setti

n

g

.

For

MUL

TI

PL

I

ER

setti

n

gs

less

t

h

an

1,

t

h

e

retrace/off

time

is

from

10

ms

to

100 ms,

w

h

ic

h

results

i

n duty

cycles

a

pproaching

100

ο/ο

;i

.e

.,

frequency

equals

approximately

2

Χ

FRE

Q

UEN

CY

Hz

d

ial

setting

.

REV

.

Β

JUL

197

8

Free-

R

u

nn

ing

O

u

tput

T

he

following

proced

u

re

provi

d

es

α

fr

ee-run

n

ing

waveform

outp

ut

wit

h

variable

fre

q

ue

n

cy

an

d

amplitude

.

1

.

Set

t

h

e

A

MPL

control

to

t

he

fully

co

u

ntercloc

k

wise

p

osition

and

t

he

O

FF

S

E

T

co

n

trol

to

t

he 0 (cen

tered)

positio

n

.

C

h

eck

t

h

at

t

he

PH

AS

E

co

n

tr

ol is

pus

h

ed

in (off)

.

2

.

Set

t

he

FUN

CTIO

N

selector

to

t

h

ed

esired

waveform

(see

F

ig

.

1-5)

.

F

ig

.

1-5

.

O

u

t

p

ut

wavefo

r

ms

availa

b

le

f

r

om

t

he F

G

501

.

3

.

Select

t

he

desire

d

fre

quen

cy

wit

h

t

h

e

MUL

TI

PL

I

ER

selector

a

nd

FRE

Q

UEN

CY

Hz

d

ial

.

F

or

exam

p

le,

if

t

h

e

MUL

TI

PL

I

ER

selecto

r

is

set

to

t

he10

5

p

osition

an

d

t

h

e

FRE

Q

UEN

CY

Hz

d

ial

is

at

5,

out

p

ut

fre

q

ue

ncy

is

500

kH

z

;

i

.e

.,

MUL

TI

PL

I

ER

setting

Χ

FRE

Q

UEN

CY

Hz

setti

ng

.

T

h

e

output

fre

q

ue

n

cy

is

calibrated

w

h

e

n

t

h

e

FRE

Q

UEN

CY

VERN

I

ER

control

is

in

t

h

e

fully

cloc

k

wise

p

ositio

n

.

T

h

e

d

uratio

n

of

ram

p

a

n

dpulse

waveforms

is

depende

n

t

on

t

he

MUL

TI

PL

I

ER

setti

n

g

.

See

Duration

of

R

am

p

s

an

d

P

ulses

under

O

p

erating

Co

n

si

d

eratio

n

s

for

furt

h

er

i

n

formatio

n

.

4

.

Connect

t

h

e

loa

d

to

t

he

O

U

T

PU

T

connecto

r

and

a

dj

ust

t

he

A

MPL

co

n

trol

for

t

h

e

desired outp

ut

am

p

litu

de

.

V

a

r

iable

DC

Offset

Pull

outwar

d

on

t

he

O

FF

S

E

T

con

trol (pull

switc

h

a

dded

at

S

N

13020000)

to

positio

n

t

h

edo

level

(baseli

n

e)

of

t

h

e

outpu

t

waveform

.

F

or

exam

p

le,

+5

V

of offset

will

i

n

c

r

ease

t

he

do

+

p

eak ac voltage

of

α7

.5

Vρ

-

ρ

out

p

ut

to

+5

and

+12

.5

V

do

+

p

ea

k

ac

w

h

ile

-5

V

of offset

will

re

d

uce

t

h

e

d

o

+

pda

k

ac

outp

ut

to

+2

.5

V

a

nd

-5

V

.

REV

.

C

JUL

197

8

O

PER

ATIO

N

Ope

r

ati

n

g

I

n

st

ru

ctio

n

s-

F

G

501

Gate

d

(

B

urst)

Output

an

d

V

ariable

Ph

ase

Α

gating

sig

n

al

of

2

to

15

V

amplitu

d

e a

pp

lie

d

to

t

he

GAT

E

I

NPU

T

connector

wit

h

t

h

e

PHAS

E

control

pu

lled

out

will

provide

α

burst

of

cycles

at

t

he

O

U

T

PU

T

co

nn

ector

.

T

he

d

uration

of

t

h

e

burst

a

nd nu

mber

of

cycles

in

t

h

e

bu

r

st

depen

d

on

t

h

e

gati

ng

signal

du

r

atio

n an

d

t

he

output

fre

q

uen

cy

selecte

d

.

Wh

en

t

h

e

gati

ng

sig

n

al

goes

to

t

h

e

zero

level,

t

he

ge

n

erator

completes

its

last

cycle an d

remains q

uiescent

un

til

t

h

e

n

ext

gating

signal

.

Si

ngle

cycles

can

b

e obtained

by a

p

plyi

ng

α

gati

ng

signal

wit

h

α

perio

d

approximately

equal

to

t

he

p

erio

d

of

t

he

F

G

501 ou

tput

waveform

.

T

he

n

um

b

er of

cycles pe

r

b

urst

can be ap

p

roximated by

d

ivi

d

i

n

g

t

he

gating

sig

n

al

duration

by

t

he p

eriod

of

t

h

e

F

G

501

out

p

ut

f

r

eq

ue

ncy

.

GAT

E

INPU

T

OUT

PU

T

GAT

E

INPU

T

OUTPUT

GAT

E

I

NPU

T

OUTPUT

PH

AS

E

co

n

tr

ol

at

90

°

L

AG

PH

AS

E

co

n

trol

at

0

°

PHAS

E

co

n

tr

ol at

90

°

LE

AD

1431-04

F

ig

.

1-6

.

Si

n

gle

cycle

ou

tp

u

t

wit

h

variable

ph

ase

.