DESCRIPTION
INTRODUCTION
The
great
volume
uf
sales
of
Class
D
<27
MHzI
Citizen's
Hand (CB) radio tran!IC;evers has created a great de-
mand
for CB service. The CB42 CB Analyzer
wmhines
all
functiol18 necessary for alignment
and
U"ouble·shoot·
ing
of
HOY Class D
tran~iver
including
the
40 ChaRMl
models.
Since
all
signals
and
measurements
nceed
FCC
specifications,
Ihe
te<:hnician using
the
CB42
~Iln
be aure
the
final
proof
"fperformance
figures
are
correcl
when
Ii
seTv;re
job
is
complete.
To
get
maximum
effective"""
from
your
CB42, you
should
lJecol1le
thoroughly familiae
with
ita operation
and
applications
before
putling
the
instrument
to
use.
Play
the
Familiarization
Tap"
supplied with
the
instru·
ment.
Then
read through
the
s~l>-by·s\ep
instructions
in
the
Operations
Sfflioll
of
this
rnMua]
as
well
as
the
Ap-
plicatio;>ns
Section,
FEATURES
The
CB42
CB
Analyzer includeB
all
n~8SIlry
functions
for
CB
alignment
and
troubleshooting,
The
CB42
out-
puts
include
a
40
channel
RF
tuner,
adjustable
IF
g.merator
a",j
audio
generator. A
sp""ial
scope
adapter
output
allows
any
I MHz scope to he
u~
for
~a
..
ier
troubleshooting.
The
CB42
also
includ~"
hij(h accuracy
auto-ranging
digital
frequency
oounter
with
7
digits
of
readout.
Spe<:ial CB
tests
include
dil'(ital
readout
or
crystal
activity,
RF
and
audio
power.
and
percent
modulation,
Sencore's
exclusive
Percent
Off
Channcl
and
simpl
if>e<l
EI A receiver ""nsitivity
tests
are
included
to
speed transceiver trouhleshooting.
SPECIFlCATIONS
RF_IF
GENERATOR
RF
GENEHATOR
METHOD:
Crystal-controlled.
digitally
pro-
grammable
phase-locked loop
lPPLL),
CI:l
AM: 40
standard
FCC ClallS D cbannels, switch
5elected.
CRYSTAL
ACCURACY:
Setability
.±-
.0001%
~1
ppm)
@
25°
C;
temperature
stability:
Ippml
C;
aging: 5
ppm/mo,
10
ppmfyear
max.;
warm_
up
time:
45
minute.
for
TIlted
accuracy.
MODULATION:
Internal
AM
modulation
atO, 30.
or
100'1>
using
internal
Audio
Generator.
or
exter-
nal
input on
rear
panel.
External
input:
4 V pop re-
quired
for 100%
modulation.
IF
GENERATOR
Five
continuously
variable
bands,
from
315KHz_12MHz.
MODULATION:
Same
sa
RF
Generator.
MONITORING
Either
RF
or
IF
{raquent"y
may
bo1
monitored
with
4
internal
frequency
counter.
OUTPUT
AITENUATOR
OUTPUT
iMPEDANCE:
50
Ohms
RANGE:
.luV-.1V (lOOK uV) in 6 continuously
,'ariable
stePl!.
PROTECfION:
Diode protected
against
acciden-
taltransmit.
AUDIO
GENERATOR
FREQUENCY:
400,
1000
Hz,
Or
EIA
SSB
Two-
tone
(500+2400
Hz)
ACCURACY:
±Hl%
OUTPUT:
0_4
V P_P, AC ooupled
into
50
Ohms
or
greater
load.
Usable
into
8ohnt8.
FR~:QUENCY
COUNTER:
DlSPLA
Y: 1 digit, 7 segment.
LED
display
__
auto
ranging.
l.ED
"KHz,
MHz"
indicators
controlled
by
auto
range.
RANGE:
50Hz_50MHz
(guaranteed),
SSMHz
(typical)
CRYSTAL
ACCURACY:
Setability
i .0001%
(1
ppm)
@
25°
C;
tempenotute
stability:
1
ppm/
o
C;aging:
5
ppmfmo,
10
ppm/year
max.;
Warm_
up
time:
45
minutes
{or
rated
accura<;y.
INPUT
IMPEDANCE,
1
MCj!'ohm
or
50
Otmu.
RESOLUTION:
\0
Hz
SENSITIVITY
300 mW (SO
Ohm
inllUt.
25
Watts
PEP
maxI. 25 mV
(l
Megohm input,
SO
Hz_30
MHzl.
CRYSTAL
CHECK:
Ml::THOD:
&rie..
resonanteircuit
for
fundamental
cl)'lItal frequent)'.
HANGE:
\-20
MHz
ACCURACY:
Same
as
FrequenW
Counter
PERCE"''T
OFF
CHANNEL:
METHOD:
Displays
pert
...
"t
f""IUenW
deviation
of
transmitter
compared
to
CB
RF
TUNEH
frequen_
cy
RANGE:
0-1.0000%
transmitter
error.
ACCUHACY:
j:.OOO2%
(2S·C), j:.002% (15°_35°
C,
DISPLAY:
6_digit 0.0001% Resolution,
LED
"'"
on- CHANNl::L" indi<:ator.
PERCI'NT
MODULATiON
METHOD:
Indicates
lle"",nt
~ontinuous
tone
AM
modulation,
positive
or
negative
for
sine
wave
modulation.
Compart'S
peak
audio
to average
RF
carrier.
HANGE: (Positive): 0-200%, (Negative): 0-9S%.
ACCURACY:
±5%
o{
reading
(30-100% I
DISPLAY:
3 1/2
digit
0.1% resolution.
LED
"%
Mod"
indicator,
RF
POWER
WA'ITMETER
RANGE:
0-20
watts
Peak
Envelope
Power
(PEP),
20-30 MHz.
ACCURACY:
.±.
5%
of
reading
(2-20
WPEP).
INPUT
IMPEDANCE:
50
Ohnu
DISPLAY:
3
\/2
digit. 0.01
Watt
resolution. Lim
·'WATT'S" indicator.
I
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