Icom IC-A25N, Service Manual

Page: 52 / 90

4-4
4-3 RECEIVE ADJUSTMENTS
Select an adjustment item by pushing [ 1.
Y
]/[
Z
].
Set or modify the adjustment value as specified by rotating [DIAL], and then push [ENT]. 2.
ADJUSTMENT
ADJUSTMENT
ITEM
TRANSCEIVER'S CONDITION OPERATION VALUE
NO. NAME
RECEIVE
SENSITIVITY
- AM -
1
044 BPF1
Frequency: •
IC-A25N: 108.025 MHz
IC-A25C: 118.025 MHz
Receiving •
Connect the SSG to the antenna
connector, and set as shown below:
Frequency:
IC-A25N: 108.025 MHz
IC-A25C: 118.025 MHz
Modulation: None
Level: +10 dBμ
†
(−97 dBm)
Push [ENT]
(Automatic
adjustment)
2 045 BPF2 Frequency: 127.500 MHz •
Receiving •
Set the SSG to:
Frequency: 127.500 MHz
Level: +5 dBμ
†
(−102 dBm)
3 046 BPF3 Frequency: 136.975 MHz •
Receiving •
Set the SSG to:
Frequency: 136.975 MHz
- FM - 4
047 BPF4
Frequency: 161.650 MHz •
Receiving •
Set the SSG to:
Frequency: 161.650 MHz
5 048 BPF5 Frequency: 163.275 MHz •
Receiving •
Set the SSG to:
Frequency: 163.275 MHz
SqUELCH
LEVEL
- Wide -
1 050 WSO_S Frequency: 118.025 MHz •
Receiving •
Connect the SSG to the antenna
connector, and set as shown below:
Frequency: 118.025 MHz
Modulation: None
Level: −10 dBμ
†
(−117 dBm)
Push [ENT]
(Automatic
adjustment)
2 051 WSC_S Set the SSG to:
Level: −13 dBμ
†
(−120 dBm)
3 052 WSO_T Set the SSG to:
Level: +13 dBμ
†
(−94 dBm)
4 053 WSC_T Set the SSG to:
Level: +10 dBμ
†
(−97 dBm)
- Narrow - 5 054 NSO_S Frequency: 118.030 MHz •
Receiving •
Set the SSG to:
Level: −10 dBμ
†
(−117 dBm)
6 055 NSC_S Set the SSG to:
Level: −13 dBμ
†
(−120 dBm)
7 056 NSO_T Set the SSG to:
Level: +13 dBμ
†
(−94 dBm)
8 057 NSC_T Set the SSG to:
Level: +10 dBμ
†
(−97 dBm)
- FM - 9 058 SO_S Frequency: 162.550 MHz •
Receiving •
Set the SSG to:
Frequency: 162.550 MHz
Level: −10 dBμ
†
(−117 dBm)
10 059 SC_S Set the SSG to:
Level: −13 dBμ
†
(−120 dBm)
11
060 SO_T
Set the SSG to:
Level: +13 dBμ
†
(−94 dBm)
12 061 SC_T Set the SSG to:
Level: +10 dBμ
†
(−97 dBm)
VOR 0°
(Only for IC-A25N)
1 063 VOR0 Frequency: 108.000 MHz •
Receiving •
Connect the VOR tester to the
antenna connector, and set as shown
below:
Frequency: 108.000 MHz
Level: +47 dBμ
†
(−60 dBm)
Modulation: 30 Hz 30%
9960 Hz 30%
Bearing: 0°
Push [ENT]
(Automatic
adjustment)
2nd LO
FREqUENCY
1
066 LO
Frequency: 127.510 MHz •
Receiving •
Connect the SSG to the antenna
connector, and set as shown below:
Frequency: 127.50833 MHz
Modulation: None
Level: +90 dBμ
†
(−17 dBm)
Push [ENT]
(Automatic
adjustment)
†
The output level of the standard signal generator (SSG) is indicated as the SSG’s open circuit.