Frequency And Transmit Adjustments - Icom IC-A25N Service Manual

4-2 FREqUENCY AND TRANSMIT ADJUSTMENTS

1. Select an adjustment item by pushing [
2. Set or modify the adjustment value as specified by rotating [DIAL], and then push [ENT].
ADJUSTMENT
ADJUSTMENT
NO.
REFERENCE 1 000
FREqUENCY
TX OUTPUT 1 013
POWER
014
(at 7.2 V) 2
3 015
TX OUTPUT 1 016
POWER
(at 11.0 V) 2 017
3 018
MODULATION 1 019
(at 7.2 V)
020
2
3 021
4 022
5 023
6 024
031
7
8 032
9 033
10 034
11 035
036
12
MODULATION 1 025
(at 11.0 V)
2 026
3 027
4 028
029
5
6 030
7 037
8 038
039
9
10 040
11 041
12 042
Y]/[Z].
TRANSCEIVER'S CONDITION
ITEM
NAME
REF • Frequency: 136.975 MHz
• Transmitting
BATT PL Frequency: 118.000 MHz •
• Transmitting
BATT
• Frequency: 127.500 MHz
PM • Transmitting
BATT PH Frequency: 136.975 MHz •
• Transmitting
EXT PL • Frequency: 118.000 MHz
• Transmitting
EXT PM • Frequency: 127.500 MHz
• Transmitting
EXT PH • Frequency: 136.975 MHz
• Transmitting
BATT • Frequency: 118.000 MHz
25MML • Transmitting
BATT
• Frequency: 127.500 MHz
25MMM • Transmitting
BATT • Frequency: 136.975 MHz
25MMH • Transmitting
BATT • Frequency: 118.005 MHz
8MML
• Transmitting
BATT • Frequency: 127.505 MHz
8MMM • Transmitting
BATT • Frequency: 136.980 MHz
MMH • Transmitting
BATT
• Frequency: 118.000 MHz
25NML • Transmitting
BATT • Frequency: 127.500 MHz
25NMM • Transmitting
BATT • Frequency: 136.975 MHz
25NMH
• Transmitting
BATT • Frequency: 118.005 MHz
8NML • Transmitting
BATT • Frequency: 127.505 MHz
8NMM • Transmitting
BATT
• Frequency: 136.980 MHz
8NMH • Transmitting
EXT • Frequency: 118.000 MHz
25MML • Transmitting
EXT • Frequency: 127.500 MHz
25MMM
• Transmitting
EXT • Frequency: 136.975 MHz
25MMH • Transmitting
EXT • Frequency: 118.005 MHz
8MML • Transmitting
EXT
• Frequency: 127.505 MHz
8MMM • Transmitting
EXT • Frequency: 136.980 MHz
8MMH • Transmitting
EXT • Frequency: 118.000 MHz
25NML • Transmitting
EXT • Frequency: 127.500 MHz
25NMM
• Transmitting
EXT
• Frequency: 136.975 MHz
25NMH • Transmitting
EXT • Frequency: 118.005 MHz
8NML • Transmitting
EXT • Frequency: 127.505 MHz
8NMM • Transmitting
EXT • Frequency: 136.980 MHz
8NMH • Transmitting
OPERATION
• Connect the RF power meter to the
antenna connector.
• Loosely couple the frequency
counter to the antenna connector.
• Attach the fully charged battery
pack.
• Connect the RF power meter to the
antenna connector.
• No audio applied to [MIC].
• Detach the battery pack.
• Connect the DC power supply to
[DC 11 V].
• While transmitting, adjust the power
supply voltage to 11.0 V.
• No audio applied to [MIC].
• Disconnect the DC power supply.
• Attach the fully charged battery
pack.
• Connect the modulation analyzer to
the antenna connector, through the
attenuator.
• Connect the audio generator to
[MIC], and set as shown below:
Frequency:
Level:
Waveform:
Set the audio generator to:
Level:
• Detach the battery pack.
• Connect the DC power supply to
[DC 11 V].
• While transmitting, adjust the power
supply voltage to 11.0 V.
• Connect the modulation analyzer to
the antenna connector, through the
attenuator.
• Connect the audio generator to
[MIC], and set as shown below:
Frequency:
Level:
Waveform:
Set the audio generator to:
Level:
4-3
VALUE
136.975 MHz
(±100 Hz)
1.8 W
90% (±2%)
USA, EXP:
80% (±2%)
EUR, AUS:
1 kHz
90% (±2%)
200 mV rms
Sine wave
30% (±5%)
20 mV rms
USA, EXP:
87% (±2%)
EUR, AUS:
90% (±2%)
USA, EXP:
80% (±2%)
EUR, AUS:
90% (±2%)
1 kHz
200 mV rms
Sine wave
30% (±5%)
20 mV rms