IEC 30 Series - Operating Instructions; Introduction; Operating Features; Operating Notes

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•

Section

2

OPERATING

INSTRUCTIONS

2-1.

INTRODUCTION

Your

IEC SERIES 30 function

generator

is

designed

to

permit

the

operator

to

realize

the

full

potential

of

the

instrument

without

ex-

tensive

reference

to

the

manual.

However,

for

personnel

not

familiar

with

this

type

of

equip-

ment,

figures

2-1

and

2-2

are

provided

for

quick

reference.

•

As shown in

Figures

2-1

and

2-2,

there

is

a

high

degree

of

commonality

in

the

controls

among

the

various

models.

Refer

tC'

the

individual

function

generator

pictures

on

the

specification

data

sheets

(paragraph

1-8)

for

detailed

differ-

ences

in

controls

and

nomenclature.

2-2. OPERATING FEATURES

The

names

and

functions

of

the

front

and

rear

panel

controls,

terminals,

and

indicators

are

shown

in

Figures

2-1

and

2-2.

2-3. OPERATING NOTES

While

operation

of

your

IEC function

gener-

ator

is

quick

and

straightforward,

the

following

notes

and

comments

are

offered

to

aJ.d

the

user

in

realizing

the

full

potential

of

the

instrument:

•

a.

D-C

WAVEFORM.-

Removes

all

a-c

com-

ponents

from

the

output of

the

main

amplifier

while

retaining

any

d-c

offset

that

may

be

set

up.

Turning

off

the

OFFSET

control,

leaves

only

the

50-ohm

output

impedance

coupled

into

the

device

under

test

(Thevenin

equivalent).

b.

D-C

OFFSET

VS

AMPLITUDE CON-

TROLS. -

The

output

d-c

offset

is

independent

of

the

continuously

variable

OUTPUT

LEVEL

control,

but

is

controlled

by

the

AMPLITUDE

step

attenuator

control.

Thus,

signal

ampli-

tude

may

be

varied

over

a 10:1

range

(20 db)

without

affecting

the

d-c

offset.

c.

RAMP WAVEFORM

(F34

only). -

No

ramp

waveform

will

appear

at

the

output

unless

the

MODE

switch

is

in

the

BURST, CONT SWP,

or

TRIG SWP

position.

In

the

latter

mode,

the

ramp

may

be

triggered

just

as

any

other

wave-

form

(negative-golng

ramps

in

all

cases).

d. POSITIVE RAMP WAVEFORM

(F34

only). -

A

positive-going

ramp

may

be

obtained

by

taking

the

output

from

the

FREQ

ANALOG

con-

nector

while in

the

CONT SWP OR TRIG SWP

mode.

The

ramp

amplitude

is

controlled

by

adjusting

the

SWEEP LIMIT

control

and

a

positive

d-c

offset

may

be

added

by

adjusting

the

main

frequency

dial

(within

the

mechanical

interlocks)

~

e.

TRIGGERED BURST (F34 only). - Under

normal

operation,

triggered

bur-st

is

not

avail-

able

since

,4le

main

generator

1"s

triggered

by

"

the

free-r~~

inte~.s~eepgenerator.

How-

ever,

~

triggered

burst

maybe

createdby

setting

(1)

the

MODE

control

to

TRIG SWP,

(2)

the

SWEEP,

LIMIT c'6ntrol

to

zar~

sweep

Width,

-'

•

1\'

and

(3};-~y

intrGducing'

a;trigger

signal

at

the

',.

2-1

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