IFR FM/AM-1200A

IFR FM/AM-1200A

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4-7-1

GENERAL

In

the

Duplex

mode

of

operation,

the

FM/AM-12005/A has

the

capability

of

generating

and

receiving

signals

simultaneously.

While

the

FM/AM-

1200S/A

receiver

is

monitoring

the

power,

modulation

and

frequency

characteristics

of

the

UUT

transmitter,

the

FM/AM-1200S/A

offset

genera-

tor

is

simultaneously

transmitting

to

the

UUT

receiver

with

a

signal

at

a

fixed

output

level.

This

signal

is

not

affected

by

the

operation

of

the

UUT

transmitter.

FM/AM-1200S/A

duplexer

accuracy

(setting

up

on

desired

frequency)

is

±1.3

kHz

The

FM/AM-1200S/A

contains

a

duplex

system

which

is

FM

modulated

only.

The

FM/AM-1200A

has

an

output

level

at

the

DUPLEX

Output

Connector

of

-60

dBm

±10 dB.

The

FM/AM-1200S has

two

output

levels

available

at

the

DUPLEX

Output

Connector:

DUPLEX

HIGH

Mode:

DUPLEX

LOW

Mode:

-15

dBm

(±lO

dB)

~

±49.q9

MHz

from

Receive

Frequency

-25

dB

below

DUPLEX

HIGH

at

the

same

frequency

Perform

the

procedure

in

paragraph

4-6-3

''GENERATING

FM

MODULATED

SIGNALS''

before

continuing

on

with

this

procedure.

!NOTE!

4-7-2

through

4-7-6

apply

to

FM/AM-1200A

Duplex

operation

only.

4-7-7

through

4-7-10

apply

to

FM/AM-1200S Duplex

operation

only.

4-7-2

DUPLEX

TESTING

USING

SEPARATE

TRANSMIT/RECEIVE

LINES

(FULL

DUPLEX

OPERATION)

(FM/AM-1200A

ONLY)

In

this

mode,

the

UUT

transmitter

output

is

applied

to

the

FM/AM-1200A

at

the

T/R

Connector

(11).

The

FM/AM-1200A

offset

generator

output

(available

at

the

DUPLEX

Output

Connector

(14)),

at

a

fixed

level,

is

applied

to

the

RF

input

of

the

UUT

receiver.

fCAUTION!

DO

NOT

TRANSMIT

INTO

DUPLEX

OUTPUT

CONNECTOR

(14),

AS

CONNECTOR

IS

NOT

PROTECTED

AGAINST

RF

INPUTS

ABOVE

0.25

WATTS.

4-41

04

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