ADJUSTMENTS
Item
6
Carrier
adjustment@)
Condit~on
IF SHIFT Centered
VBT Fully
clockwise
MODE USB
MODE LSB
--
Measurement
IMODE USE 456 5 kHz Reference
value
MODE LSB 453 5 kHz
I
MODE CW 455 7 kHz
STBY SEND
-
--
ST BY REC
--
7 VFO. RIT Scale 0-500 Should rotate
Test
equipment
RF
VTVM
FIX CH check
and adjustment
Adjustment
Specif~cation
03V?l dB
I
I
['"
Short
jumper
IF
Unit
IF
smoothly and
Remarks
NOTE The
slug of L20
should be
adjusted
while
it
IS
turned coun-
terclockwise
If the voltage
IS
outside the
spec~f~ed Iim~t,
adjust Ll9 and
L20 unt~l the
voltage
IS
0 3V
for both USB
and LSB
Ter-
minal
Rear panel SG SW OFF
VFO 2 50
MODE CW
STBY SEND
I
Set the VFO dial to 50 At
this time set the CAL
control to the index
Set the VFO dial to approx
450 Set the CAL control
d~al calibrated under this
VFO setting exactly to the
index
Tune
in 5550 00 kHz with
the main tuning knob
Under the above
cond~tion,
set the CAL control to the
index Turn the matn tuning,
and set the calibrated
CAL control to the index
in
the order of 0, 100, 200,
300,400,and 500 to check
frequency deviation at each
100 kHz point
Set the CAL control back to
250 under the above
condl-
tion (do not turn excessive-
ly
),
then further set back
the CAL control to
0 w~th
respect to the frequency
at 250 to check the diffe-
rence from the reference
frequency
Parts
L19
L20
NOTE
L20
Method
Max level
RF VTVM
F counter
F
counter
PLL
Rear
panel
Rear
panel
have no abnormal
noise
Pin
2,
connec-
tor
($
1 P
(GND)
EXT
VFO
1
P
7 P
(G ND)
When the vol-
tage
IS
out
quency
is
outside
specifl-
catlon
EXT
200
mV
800 Hz UP
side specifi-
cation
VFO
VFO
5550 O0
kHz
f
200 Hz
5950 00 kHz
+200 Hz
The 50 kHz
polnt
on the dial scale
must be
al~gned
to the index
With~n +2 kHz
Less than
400Hz
TC2
L4
When
the
fre-
Repeat the
adjustment
.
several
times until
the frequency
IS
with~n
spec~f~cation
Check the
scale
(Elect-
r~cally)
Backlash
200mVf 1 dB
800+ 50 Hz
VFO
I
1
CW SHIFT
1
L3
TCl
55MHz
56
57
5 8
5 9
6 0
VFO
'I P
7 P
(GND)
0
100
200
300
400
500
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