Transmitter Section - Kenwood NX-300 Service Manual

NX-300

Transmitter Section

Item
Panel tuning mode
1. High 1) Adj item: [HIPWR]
Transmit Adjust: [✳✳✳✳]
Power 2) Adj item:
adjust [L HIPWR]→
(Batt: 7.5V) [L' HIPWR]→
[C HIPWR]→
[H' HIPWR]→
[H HIPWR]
Adjust: [✳✳✳✳]
PTT: ON
Press [ ] key to store
the adjustment value.
2. Low 1) Adj item: [LOPWR]
Transmit Adjust: [✳✳✳✳]
Power 2) Adj item:
adjust [L LOPWR]→
(Batt: 7.5V) [L' LOPWR]→
[C LOPWR]→
[H' LOPWR]→
[H LOPWR]
Adjust: [✳✳✳✳]
PTT: ON
Press [ ] key to store
the adjustment value.
3. Balance 1) Adj item: [BAL]
adjust *2 Adjust: [✳✳✳]
Deviation meter
LPF: 3kHz
HPF: OFF
2) Adj item: [L BAL]→
[L' BAL]→[C BAL]→
[H' BAL]→[H BAL]
Adjust: [✳✳✳]
PTT: ON
Press [ ] key to store
the adjustment value.
Sub LCD:
Tone frequency
[Side1] key: Press
while transmitting
to change 20Hz and
2kHz.
*2: Refer to the "Necessary Deviation adjustment item for each signaling and mode" table on pages 52 and 53.
Balance adjustment is common with the adjustment of all signaling deviations.
4. Maximum 1) Adj item: [Nn NDEV]
Deviation Adjust: [✳✳✳✳]
(NXDN) Deviation meter
adjust *3 LPF: 3kHz
HPF: OFF
[Narrow] 2) Adj item:
[NnL NDEV]→
[NnL' NDEV]→
[NnC NDEV]→
[NnH' NDEV]→
[NnH NDEV]
Adjust: [✳✳✳✳]
PTT: ON
Press [ ] key to store
the adjustment value.
48
ADJUSTMENT
Condition
PC test mode
equipment
1) Adj item: [High Power
Transmit Power] meter
2) Adj item: [Low], Ammeter
[Low'], [Center],
[High'], [High]
PTT: Press
[Transmit] button.
Press [Apply All]
button to store the
adjustment value.
1) Adj item: [Low
Transmit Power]
2) Adj item: [Low],
[Low'], [Center],
[High'], [High]
PTT: Press
[Transmit] button.
Press [Apply All]
button to store the
adjustment value.
1) Adj item: [Balance] Deviation
Deviation meter meter
LPF : 3kHz Oscilloscope
HPF : OFF
2) Adj item: [Low],
[Low'], [Center],
[High'], [High]
PTT: Press
[Transmit] button.
Press [Apply All]
button to store the
adjustment value.
[2kHz Sine Wave
Check box]: Check
while transmitting
change to 2kHz.
1) Adj item: [Maximum Deviation
Deviation (NXDN meter
Narrow)] Oscilloscope
Deviation meter
LPF: 3kHz
HPF: OFF
2) Adj item: [Low],
[Low'], [Center],
[High'], [High]
PTT: Press
[Transmit] button.
Press [Apply All]
button to store the
adjustment value.
Measurement
Test-
Unit Terminal Unit
Panel ANT Panel
Panel ANT Panel
Adjustment
Specifi cations /
Parts Method
[Panel 5.0W ±0.2W
tuning 2.3A or less
mode]
[ ], [PC test mode]
[ ] Press [Apply All]
button to store the
[PC test adjustment value
mode] after all adjustment
[ ],[ ] point was adjusted.
0.8W ±0.1W
1.2A or less
[PC test mode]
Press [Apply All]
button to store the
adjustment value
after all adjustment
point was adjusted.
The Deviation of 2kHz Tone deviation
20Hz frequency is is within ±1.0% of
fi xed. Change the 20Hz tone devia-
2kHz adjustment tion.
value to become
the same deviation [PC test mode]
of 20Hz within the Press [Apply All]
specifi ed range. button to store the
adjustment value
after all adjustment
point was adjusted.
[Panel 3056Hz 2995~3117Hz
tuning
mode] [PC test mode]
[ ], Press [Apply All]
[ ] button to store the
adjustment value
[PC test after all adjustment
mode] point was adjusted.
[ ],[ ]
Remarks