Sencore CB42 User Manual

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SOlELCH TEST

C.

"f

TIINIII

•

po

.~

.......

~

..

"

..

;:.:0)

nnn;:lnn

UUUL.UU

~,:,;:,

S_NCOC-.

-...

.....

_

....

0

,"

I

II

I

I ,

...

_.

"f_\f

GllftllaT_

auOIO

OlOOlTal

IIlaOOUT

,"UCTOII

-

"':0:

0

05

":~":

...

_

....

--"

...

~

!

'I

,

MlClIOVOlT

OUTPUT

IPlalllll

lUll

..

,.

.

'.',

,::~::.

on"

.::~::

0

;;:"~~~

,

".

aNalTZING

OIlTPUT

IlGNAU

MGOIl

OIGnAl

IIlaOOIlT

""'AliT

'IGNaL'

no

C14.

...

....

-

no

•

m

F~.

27-Control

&tup

for

tnt

of

~r..lch

Optrfltioll.

Proper

ope

..

tion

of

the

squelcb

c:ireui~

aUo

..

the

CB

IDel

to

elimin,te

background noise

by

raising

the

.ell'

siUvity

..

ting

of

the

receiwr.

The

ErA

'ptJiif-

that

the

~iYer

shOll-ld_

unN\'elc:b TtIel.f

with

e

~ueletl

COI'Itrol

let

~

ita

:t~.

jmRimUID

M:jueJilied) poIi.

lion aomewhere between 30 and

lOOO

mic:roYoIt&Jlf

jneoming

Illijiil:-M"'"olt

manuf~i

inlirilctioN

In':

more ipedf"1C U

to

the

point

I.t

wbich

the

~ver

unsquelches

iuelt.

Por

thU

reason,

the

lpedtic

manu-

facW.nr'. inlUUc:tions

Ihould

be c:onMled

lor

the

PropH

tquelchaensitiYity.

To

teat

lor

Iquekh

opentton:

1. Supply

the

proper power

to

the

CB

reoeiYer.

2. Connect

the

output

of

the

RF·IP

OUTPUTjack

to

the

receiver'.

antenna

jack tiling

the

IUpplied

RF

cable.

3.

Conned

the

audio

output

of

the

receiver

to

the

SPEAKER SUB

input

of

the

CB42 uling

the

IUpplied

audio

cable.

Set

Ule

SPEAKER SUB

,witch

to

the

proper

impedance

to

ml.tch

the

output

of

the

receiver.

4. Set

the

CB

CHANNEL TUNER to

the

&arne

channel

II

the

CB

re<Jeiver.

5. Set

the

intt>ma1

audio

genel'l\tor to 1000

H~

and

the

AUDIO MODULATOR lwitch

to

3~.

28

6.

Set

the

DIGITAL

REAOOlfr

SELECTOR to

the

AUDIO WATTS position.

7. Set the receiver'1 volume COI'Itrol

to

muimum

.....

8.

Set

the

receiver', Iquelch

control

f..,..

liPt~

Iqueidt

(ma&imum

tqueleh).

9.

lnc:reue

the

MICROVOLTS

Otrn'UT

OCNltrob

until

the

receiver

just

break,

IQUI"kb.

This

will

be

the

point

that

the DIGITAL READOUT juat

begiru

to

..

ow

I.n

I.udio

output.

10.

Read

the

1Dl000n~

of

inpu~

&igna1

din!ctly from

the

calibntioM

on

the

MICROVOLTS

OlfrPUT

controls.

EIA

SENSITIVITY TEST

Receiver sen.ilivity ill defined

by

the

EJA U

the

.amo-,Ul~

Of

liK!!lil-th-m~r'

4'10

dB

..

tio

bet

..

~

U:lt

Signal Plul Noise + I

aoathe

NoISe

_-eN).

The

formull. for !erultivity ill:

---(5

+

N)

tOdD:

(N)

Table of Contents

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Sencore CB42 Specifications

General

Brand	Sencore
Model	CB42
Category	Measuring Instruments
Language	English

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