To
Woe
the
1 MEG LOADED EXTERNAL
FRE.
QUENCY input:
1.
Connect
the
test
point
to be measured
to
the
1
MEG LOAD
input
using
the
~pecial
frequency
counter
teat lead.
Thi.
lead has a ground connec·
tion
(black alligator clip) and two
input
leacb.
The
red lead provide. a
direct
conne.:tion
to
the
counter,
and
the
yellow lcad is isolated with an
internal 33
pF
capacitor
to
minimi~
circuit
loading.
PERCENT OFF CHANhEL TEST
"'lid
lit
..
,
II
2.
Select
the
EXTERNAL FREQ., 1 MEG LOAD
pOllitioo on
the
DIGITAL READOUT
SEL.
LECTOR.
3. Read
the
test
point
frequency on
the
DIGITAL
READOUT.
The
MHz
and
KHz
lights will
dit.-
play
the
range
!Seledeod
by
the
automatic
TlITlging
circuits
of
the
FREQUENCY COUNTER, and
the
de.:imal
point
will
he
positioned
appr<;>-
prilltely.
nnn,.,u'"
uu.uu-..J
o 0 0 0 0
,
..
,"
D'G,r"'L
RUIlOUT
SELECTIlR
,~,.!.,.
•
•
0:·
Illl.'n
...
~
.n.DouT
,NpuT
lIOo
.....
~.
,::11:'"
Fig.
7-Control
Setup for %
off
Channel
The
PERCENT
OFF
CHANNEL
test
will indicate
the
7.
percentage
of
deviation
of
the
CB
tr'lInsmitter'l fre·
quency from
the
FCC specs on
the
DIGITAL
READOUT.
To
perform
the
PERCENT
OFF
CHANNEL teat:
1.
Connect
the
transceiver to
the
pro,"",r
power
source aJl described
in
the
PREPARING FOR
TEST
Ilection.
2.
Connect
the
antenna
output
of
the
transceiver
to
the
50
OHM
input
of
the
CB42 using
the
sup-
plied
RF
cable.
3.
Set
the
DIGITAL READOUT SELECTOR
to
the
%
OFF
CHAN position.
4.
Set
the
RF·IF
GENERATOR selector switeh
to
the
AM
p06ition.
5.
Select
the
same channel
on
the
CB
RF
TUNER
and
the
transceiver Wlder
ted.
Key
the
trans-
mitter.
If
a frequency error
of
more
than
.005% uindio
cated,
the
DIGITAL READOUT SELECTOR
may
be
moved
to
the
50 OHM EXTERNAL
FREQ.
position
to
determine if
the
tmnsmitted
signal frequency is higher
or
lo
..
er
than
the
pro-
per frequency.
NOTE: A reading
of
a
transmitter
fre·
quency 0.0043·.0057%
off
channel would
be
considered questionable since the trans-
mitted frequency
is
at
the
very limit
of
the
FCC specs.
The
rnnge
gi....,n
also
includel
the
poslIibilily
of
the
CB
RF
TUNER
operating slightly
0((
channel
but
still
..
ith·
in
its frequency limits.
The
IUspeded.
bad
tnlll.'lmitter may
be
retested usin«
the
EXTERNAL FREQUENCY function
and
referring
to
the upper and lower limits
table fOWld in the
TClIt
Setup
Booklet.
6.
The
DIGITAL READOUT will indicate
the
amount
of
transmitter
frequency error.
The
FCC
allows a
maximum
error
of
.005%.
14
8.
Repeat
the
test
on all
transmitwr
channell
by
changing
the
transmitter's channel !Selector con-
trol
at
the
wne
time as
the
CB
RF TUNER
switch.
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