Sencore CB42 User Manual

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sse

RECEIVER IMPULSE NOISE

TEST

'"

11111""

IIF_If'

aUOllAIlTOA

IlUCIO

,

...

,.,

....

'

....

n

uuu

'.UU

MICIIO.\

•••

~L~Fi.1.UTPUT

'::i::'

,:~i::

'"

••

NL204

D'GITAl

AEAODUT

INPUT

SIGNALS

.....

"

...

FV.

43-<i<>/Ih'olllttup

tOT

SSB

AGe

trlt.

The

EIA

impulR

nolle

test

indicatell

how

weU

the

Automatic

Noiae

Limiter

(ANL) snc!

Automatk:

Nobe

Blanker (ANB) canoel noise

pu,,"

without

drutlcally

c:banJing

the

recmer'llen5itiYity.

The

tell

is

perfonned

with

the

optional

NL204

ElA

NoUe

PuIte

Simulator.

To

perform

the

impulle

DOlle

test:

I.

Supply

the

proper power

to

the

CB receiver.

2.

Conned.

the

output

of

the

CB42's RF-I.F OlIT-

PlIT jack

to

the

input

of

the

NL204.

Conned.

the

output

ot

the

NL204

to

the

antenna

input

of

the

~iver

using

the

supplied

RF

cable.

3.

Conned.

the

rece~r'a

audio outp!.lt to

the

SPEAKER

SUB

input

jack using

the

supplied

audio

able.

Set

the

SPEAKER

SUB

contl"ol

f~

the

aame Impedance u

the

output

of

the

l:'llCeiver.

4.

Set

the

CB

RF TUNER and

the

SSB

~ceiver'l

channel selector

to

the

aame channel

with

the

squelch control

at

minimum.

S.

Set claritler by performing General SSB Receiver

Telt.

6. Set

the

MICROVOLTS

OUTPlIT

COlltroli

to

provide 1

uV

of

aignal

(I.l

and 10).

40

7.

Set

the

DIGITAL

READOl1r

SELECTOR to.

the

AUDIO WA1"I'S posit.ion.

8.

Connect

an

OIcilJoacope in pcaIlel.

with

the

SPEAKER SUB connection.

An

audio

"Y"

cable

may

be

UMd for thi.I

connection.

9.

Set

the

RF.IF

CONTROL

_itch

to

the

LSB

position.

10. With

the

NL204

tumed

off

and

receMr

ANL

and

AND

.tritcbs

wmed

off,

perfOlDl

the

SS8

TrCl'illrr

IItnlitilJity

tr.t

described previously.

NOTE:

'!be

rece;voer'.

-.itivity

aboWd

Indicste

sbout twice

AI

llW1y

microwlt6

u a

oonnal

I.eIt dUll to

the

~

in

the

6 dB

miIiq:

circuit6

of

the

NL204.

11.

With

the

RF·IF

CONTROL switcb in

the

LSB

j)OIition, adjuat

the

receivrr'. volume control for

a readout

of

1.00

on

the

DIGITAL READOUT.

NOTE:

If.

1.00

"",dout

ClIDIlOt

be

0b-

tained with

the

volume

control

at

maI,

leave Ihe COlltrol

at

mu:

and

note

the

"",dout

st

thil

point.

Then

Ulle

this

rlgW'l!"

thr

I"drnnce

point.

No~

the

peak-to-pellk value

of

the

audio

output

on

the acope.

Table of Contents

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Sencore CB42 Specifications

General

Brand	Sencore
Model	CB42
Category	Measuring Instruments
Language	English

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