Hammarlund FM50A - Page 12

34 pages

Save Page as PDF

To Next Page

To Next Page

To Previous Page

To Previous Page

Loading...

maximum

forward

power

and

check

reflected

power

which

should

normally

not

exceed

10%.

Unusually

high

reflected

power

may

be

caused

by

one

of

the

following

reasons:

(a)

Incorrect

whip

length.

(b)

Damaged

transmission

line.

(c)

Break

in

outer

shield

of

transmission

line.

(d)

Antenna

mounted

in

close

proximity

to

other

objects

on

the

vehicle.

In

the

latter

instance

(d)

modifying

the

whip

length

from

the

"free

space"

dimension

may

correct

the

condition.

FREQUENCY ADJUSTMENT:

The

Federal

Communications

Commission

requires

that

all

transmitters

of

this

type

be

checked

for

frequency

upon

installation

and

at

least

once

every

twelve

months

thereafter

with

an

instrument

having

an

accuracy

of

twice

that

of

the

equipment

being

measured.

In

this

instance

the

measuring

instrument

should

be

rated

at

± . 00025%. •

All

transmitters

are

adjusted

to

frequency

prior

to

shipment

however

the

installer

is

required

by

the

FCC

to

make

this

test

upon

completion

of

the

installation.

-12-

FREE DOWNLOAD

COURTESY OF N9SOR

WWW.HAMMARLUND.ORG

Table of Contents