Since,
properly
operating
SSB
tranimiUer
hu
no
output
without
modullltion, a modulation signal mUlt
be
applied
to
IDeUu",
the
output
trflqu.ency.
To
mea.ure
the
output
frequency:
1. Connect
the
antenna
ouq>ut
to
the
SO
Ohm
1<*Ied
input.
2.
Conned.
the
aumo
output
of
the
CB42
to
the
miaopbooe
input
usinc
a
dil'Kt
connection
(uainc the
-.lpplird
audio cable)
or
by
winl
the
390102
Dynamic
Mike
Tener.
3.
Set
the
tratumitter
flmction 1Witdl.
to
the
upper
sideband
pcNition (USB).
4.
Set.
the
CJl.42'. audio
~erator
to
1000
H~.
5.
Set
the
C842'.
audio
output
le¥fl
to
provide
about
8 Watta PEP
..
monitored by
the
RF
WA'ITS poaition
or
the
DIGITAL READOUT
SELECTOR.
6. Move
the
DIGITAL REAOOIIT SELECTOR
to
the
"SO OHM
load"
Jl(l*ition
of
the
EXTERNAL
FREQ. function.
The
output
frequency
of
act1
channel
may
DOW
be
monitored.
Remem'-
that
eadl. channel will
rnd
1000
H~
,bow
the
center
~uoency
of
the
tran.
miuer
(ance
the
sicnIJ
heine
meal\lre:l
ilactually
the
upper
sideband which ill the IUppr d
earrift
fre-
quency plus
the
modulation frequency). This differ·
ence
lDI.y
IllIo
be
\l.ed
to
check
the
chanDeI fre-
quency
by
UAnI
the
P~t
orf
Channcl
function.
SSB
TRANSMITTER PERCENT OFF
CHANNEL
0::1
llf
rUNEIl
y
n"nn,:n
wu
....
,u..Ju
o 0 0 0 0
••
'
Co
.,.11'
lil:NfllUOIl
IUDIO
-
·JO:
0 0
ti
AUDIO
OUrP\ll
OIGlrlL
IEAlKMll
SIlI:C10I
'o:'
..
i!"
-
-:0:·
A'UllllPfli
DV'_ur
SIGNltS
-
",,,,n
MOOIL
ca.'
. -
m
DIGITAL
Ilr'DOur
IWVT
SIGOtS
--
_
.....
FW·
45-C<>ntrolMtup {Of'
dtt,rminifll
SS8
tnl1l.mitter percent
off
ell/lnne!.
With
the
same cable connection used for
the
abo
...
test:
1. Set
the
DIGITAL READOUT SELECTOR
to
the
PERCENT
OFF
CHANNEL PQlition.
2.
Set
the
RF.IF
GENERATOR control
to
the
USB pcNition.
Thil
dlifta
the
reference .igna!
iupplied
to
the
%
OFF
CHANNEL circuits
42
by
the
generator
1000
H~
.hove
the normal
carrier frequency.
3.
RotlLtl':
the
transmltter'l
channel !Il':lector
knob
through
each
of
the
CB
chllllnel. while lli!ttinll
the
CB
RF
TUNER
knob
to
the same channel
for
each test.
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