Kenwood NX-420 K Service Manual page 42

NX-420
Item
Panel tuning mode
4. Receive This adjustment can
Assist be performed only in
PC test mode.
5. Transmit This adjustment can
Assist be performed only in
PC test mode.
6. Frequency This adjustment can
be performed only in
PC test mode.
42
ADJUSTMENT
Condition
PC test mode
equipment
[Manual Adjustment]
1) Adj item: [Receive
Assist]
2) Adj item: [Low],
[High]
Press [Apply All]
button to store the
adjustment value.
[Manual Adjustment]
1) Adj item: [Transmit
Assist]
2) Adj item: [Low],
[High]
[Low(TA)]
[High(TA)]
PTT: Press
[Transmit] button.
Press [Apply All]
button to store the
adjustment value.
1) Adj item: [Frequency] SSG
SSG output:
–20dBm (22.4mV)
(CW (without modu-
lation))
Caution:
Perform the frequency
adjustment under the
following conditions.
• Temperature
range of +20°C to
+26°C (+68.0°F to
+78.8°F).
(The temperature
is displayed on the
Frequency adjust-
ment screen of the
KPG-141D.)
• Use an accuracy
of 0.001ppm for
the SSG. (Use a
standard oscillator if
necessary.)
Measurement
Test-
Unit Terminal Unit
Panel [PC test
Panel ANT
Adjustment
Specifi cations /
Parts Method
[PC test mode] 2.5V±0.1V
mode] [Automatic Adjustment]
[ ],[ ] 1) Press [Tune [Automatic Adjustment]
Assist Voltage] After the auto-
button. matic adjustment
2) Press [Apply All] is performed, verify
button to store the that the VCO lock
adjustment value voltage is within the
after the auto- voltage range which
matic adjustment is specifi ed by the
has fi nished. manual adjustment.
[Manual Adjustment] [Manual Adjustment]
[V] indicator on the Press [Apply All]
PC window shows button to store the
VCO lock voltage. adjustment value
Change the adjust- after all adjustment
ment value to get points have been
VCO lock voltage adjusted.
within the limit of
the specifi ed volt- Note:
age. The assist adjust-
ment value must be
Note: between from 340
Confi rm the VCO to 3550.
lock voltage approx-
imately 3 seconds
after the adjustment
value is changed.
[PC test mode] [PC test mode]
Press [Start] button "IF20" value =
of "Auto Tuning". Within 0±25 digits.
Press [Apply] button The value of "IF20"
to store the adjust- will become around
ment value after the "0" after the adjust-
automatic adjust- ment has fi nished.
ment has fi nished.
Remark:
"Frequency" is
adjusted under
receiving condition
with SSG.
Remarks