Sencore CB42 User Manual

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Page #34 background image

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Tbe

pin

or

a receiver is

the

ratio

or

the

output

poWfr

to

the

arnOW'lt

or

antenna

input

poWB.

The

u.e

of

the

C842'1

audio

wattmeter

limplirJell thia

leSt.

Iinct!

the

output

Iign&1

is

I8d

AI

a po1fB nlthe!"

than

a

"ol~.

This

mean-

that

the

output

impedance

and

voItagft;

do

not

need

to

be

calcubted for

the

pawer

nltw.

The

aecompan)'inC pa.ph shows the

amount

or

receiver

pin

in dB

ming

a

1.00

Watt

output

lIS

a

rere~ce.

To determine receiver

cain'

1. Supply

the

proper power

to

the

CB

receIver.

8.

Adjll!lt

the

MICQOVOLTS OUTPUT

conuols

for a

~ading

or

1.00 Walta

on

the

DIGITAL

READOln'.

9. Read

the

teUinc

of

the

MICROVOLTS OUTPUT

controll

to

determine

the

amount

of

input

nec-

essary

ror

a

1.00

Walll readout.

10.

n,e

receiver

pin

iI

the

point

on

the

graph indio

cated

by

the

setting

of

the

MICROVOLTS OUT·

PUT control

•.

EXAMPLE: A reading

ot

1 uV

indicatea a

pin

of

137 dB.

s

s

~

._~

..

.,

.•

~

o.

•

... uII

I

..

2.

3.

••

,.

• 6.

7.

Connect

the

output

or

the

RF

·IF

OUTPl1I'

jack

to

the

.-ivtr·.

anu.nna jaclt Ulilli

the

IUpplied

RF

a.bIe.

Conned. the audio

output

or

the recei'i'l'r

to

the

SPEAKER SUB

input

of

the CB42 uaina

the

IUpplied audio a.ble.

Set

the

SPEAKER SUB

lwitch

to

the

proper impedance

to

match

the

output

or

the

receiver.

Set

the

CB CHANNEL TUNER

to

the

&ame

channel

AI

the CB receiver.

Set

the internal audio gl!Mrator

to

1000

Hz

and

the AUDIO MODULATION Iwitch

to

1~

Set

the

DIGITAL READOUT SELECTOR

to

the AUDIO WATTS poUtion.

Set

the

receiver'. volume

conkol

to

.....

imum

pin,

and Iquelch

to

minimum.

•

-

•

"

-.

'I

."

i:L

,!.;-

~:

--!-----

'-.:=;,=,,[,

±

I~T""l~

...

t"l

•

I'vm;::

-

Fil. 35-C1«lrt

for

detumilli".

dB

of

~«i~r

pill.

EIA

IMPULSE

NOISE LIMITER TEST

ca

II'

TUNEII

•

~

...

:1~)J

nnn

,nn

wuu

•.

uu

.........

Co_

......

a_

....

't.~'"

,y

...

0

·"tlftll'·"

..

".

R'·If

GENERATOR

AUOIO

OIGI''''~

AUDOUT

InECTOA

-"

•

"':0:

(0

•

(0

:0:.."._,"",

---

0

-

I

II

I

..

-

.lCIiOVOI.T

OUTPUT

_._-~

,.

,.

.

l.',

"EAl(lR

lUll

,::~::.

..

..

,~~::

(0

'''''~::'O''

••

ANALYZING

OUTPUT

!lIGNA~S

MOOEl

OlliIT.~

AE"'OOUT

INPUT

"GNA~a

~

el.z

,

.........

.'

•

IT:]

NL204

I~

.

•

•

Table of Contents

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Sencore CB42 Specifications

General

Brand	Sencore
Model	CB42
Category	Measuring Instruments
Language	English

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