Motorola 9501 Technical Information download pdf (Page 12)

1.

SENSICON

and

UNI-CHANNEL

Receiver

Znd

IF-t"g.

Altg"-."t

The P-8501-A

may be

used to

align the final

IF of SENSICONand

UNI-CIIANNEL

Receivers

in

all

frequency

ranges

if

an additional

455 kc. or

45?

kc. i.s

purchased

for use with

the

peaking

generator.

If

a

SENSICON

receiveristobe

aligned

a

455

kc. crystal

should be

used

-

MOTOROLA

Part

No.

488801055.

If

a

UNl-CHANNEL

receiver

is

to

be

aligned a 457 kc. crystal

should be

used

-

MOTOROLA

Part No.

48K803674.

These

crystals

should be ordered

from

MOTOROLA

lNC.,

I3Z7

West

Washington

Boulevard, Chicago

7, Illinois.

The

following

procedure shouldbe

used

when

aligning

the

Znd

IF

of

SENSICON

and

UNI-CIIAN-

NEL

receivers.

(I)

Plug

the

455

kc.

or

457

kc.

crystal

into

the two

pin

crystal

socket

on the test

set,

(2)

P1ACC

thg

GRID CURRENT

-

METER-

FIELD STRENGTH

meter

in

the

GRID

CURRENT

po

siti on.

(3)

Place

the

ON-OFF

switch

in the

ON

po sition.

(4)

Setthe

ATTENUATOR

control

for

rnaxi-

mum output.

(5)

Adjust

the

frequency ADJ

control

for

a

maximum

meter

reading.

(6)

Connect

the

RF

probe cable

to the

RF

OUT

receptacle. The extensioncable

may be used

if desired.

(7)

Lay

the

RF

probe

under

the

recerver

chassis

near the

Znd

IF-I

tube,

(8)

Align

the

receiver

as outlined

in

the

ap-

plicable

SENSICON

or

UNI-CHANNEL

receiver

section of

your MOTOROLA

Instruction

Manual.

J.

P-7208

and

P-7208-A

Dummy

Loads

-*-

NOTE

The P-7208

and

P-7208-A

RF

DummY

loads

are

optional

items

not

supplied

with

this

Test

Set.

They

must

be

ordered

separately

if

desired.

The

P-7208

RF

Dummy

Load

is

a radio fre-

quency resistive load

unit which is

used in

con-

junction

with the P-8501-A Test Set

to

measure

transrnitter

RF

power output.

The

unit

has

a

standing wave

ratio of less than

I.2

over

a

fre-

quency range

of

25 mc. to

L74 mc.

and has

a

nom-

inal load

impedance of

50 ohms.

The

RF

power

capability

of the

dummy

loadis

Z5

watts

for

con-

tinuous

operation

and

60 watts

for

intermittent

ope

ration.

The P-7208-A RF

Dummy

Load.

is the

same

as,the

P-7208

except

that the maximum

power

rating is 2

watts. The P-7208-4

is designed

for

use

with

the

MOTOROLA

Portable

equipments.

To

rneasure

transmitter

RF

power

output:

(l)

Place

the

GRID CURRENT-METER-

FIELD

STRENGTH

switchinthe METER

position.

(z)

Place

the

REC.

-XMTR.

-0-50

switch

in

the

0-50

position.

(3)

Place the

9

position

meter

switch

to

the

*4

position.

(4)

Insert

the

1l pin metering

plug into

the

BLACK

transmitter

adapter

receptacle.

(5)

Plug

the adapter connector

into the

jack

on

the

RF

Dummy Load.

(6)

Connectthe

transmitter

ANT.

connector

to the

coaxial connector

on the

RF

Dummy

Load

using the extension cable supplied

with

the test

set.

(7)

Turnon

thetransmitter

power

switch

and

allow

a one minute warm-up

period.

(8)

Key

the

transmitter with

talk

switch on the

microphone

(in

test

microphone may be connected

supply

chassis).

the

press-to-

AC

models

a

on

the

power

(9)

Note

the

reading

on

the

test

set

meter.

Refer

to the

applicable

calibration

curve

shipped

withthe RF Dummy

Load

to

convert the

indicated

microamperes

to output

watts.

NOTE

If

the meter

reads off

scale,

reverse

the

meter

polarity withthe

-

*

switchbeneath

the

meter.

I

/52

-7-

54P89I690-B

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 18 19

Comments to this Manuals

No comments