Receive Adjustments - Icom IC-A25N Service Manual

4-3 RECEIVE 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.
RECEIVE 044
1
SENSITIVITY
- AM -
045
2
3 046
- FM - 4 047
5 048
SqUELCH 050
1
LEVEL
- Wide -
2 051
3 052
4 053
- Narrow - 5 054
055
6
7 056
8 057
- FM - 9 058
10 059
11 060
12 061
VOR 0° 063
1
(Only for IC-A25N)
2nd LO 1 066
FREqUENCY
The output level of the standard signal generator (SSG) is indicated as the SSG's open circuit.
†
Y]/[Z].
TRANSCEIVER'S CONDITION
ITEM
NAME
BPF1
• Frequency:
IC-A25N:
IC-A25C:
• Receiving
BPF2
• Frequency: 127.500 MHz
• Receiving
BPF3 • Frequency: 136.975 MHz
• Receiving
BPF4 • Frequency: 161.650 MHz
• Receiving
BPF5 • Frequency: 163.275 MHz
• Receiving
WSO_S
• Frequency: 118.025 MHz
• Receiving
WSC_S
WSO_T
WSC_T
NSO_S • Frequency: 118.030 MHz
• Receiving
NSC_S
NSO_T
NSC_T
SO_S • Frequency: 162.550 MHz
• Receiving
SC_S
SO_T
SC_T
VOR0
• Frequency: 108.000 MHz
• Receiving
LO • Frequency: 127.510 MHz
• Receiving
Connect the SSG to the antenna
108.025 MHz connector, and set as shown below:
118.025 MHz Frequency:
IC-A25N:
IC-A25C:
Modulation:
Level:
Set the SSG to:
Frequency:
Level:
Set the SSG to:
Frequency:
Set the SSG to:
Frequency:
Set the SSG to:
Frequency:
Connect the SSG to the antenna
connector, and set as shown below:
Frequency:
Modulation:
Level:
Set the SSG to:
Level:
Set the SSG to:
Level:
Set the SSG to:
Level:
Set the SSG to:
Level:
Set the SSG to:
Level:
Set the SSG to:
Level:
Set the SSG to:
Level:
Set the SSG to:
Frequency:
Level:
Set the SSG to:
Level:
Set the SSG to:
Level:
Set the SSG to:
Level:
Connect the VOR tester to the
antenna connector, and set as shown
below:
Frequency:
Level:
Modulation:
Bearing:
Connect the SSG to the antenna
connector, and set as shown below:
Frequency:
Modulation:
Level:
4-4
OPERATION
108.025 MHz
118.025 MHz
None
+10 dBμ (−97 dBm)
†
127.500 MHz
+5 dBμ (−102 dBm)
†
136.975 MHz
161.650 MHz
163.275 MHz
118.025 MHz
None
−10 dBμ (−117 dBm)
†
−13 dBμ (−120 dBm)
†
+13 dBμ (−94 dBm)
†
+10 dBμ (−97 dBm)
†
−10 dBμ (−117 dBm)
†
−13 dBμ (−120 dBm)
†
+13 dBμ (−94 dBm)
†
+10 dBμ (−97 dBm)
†
162.550 MHz
−10 dBμ (−117 dBm)
†
−13 dBμ (−120 dBm)
†
+13 dBμ (−94 dBm)
†
+10 dBμ (−97 dBm)
†
108.000 MHz
+47 dBμ (−60 dBm)
†
30 Hz 30%
9960 Hz 30%
0°
127.50833 MHz
None
+90 dBμ (−17 dBm)
†
VALUE
Push [ENT]
(Automatic
adjustment)
Push [ENT]
(Automatic
adjustment)
Push [ENT]
(Automatic
adjustment)
Push [ENT]
(Automatic
adjustment)