Icom IC-7851 Servise Manual page 29

• RX ADJUSTMENTS (continued)
ADJUSTMENT
MAIN 1 • Connect two SSGs to the [ANT2] connector, through a
1st MIXER BIAS
2 • Push [F-1] (1Mix A) to enter the 1st mixer adjustment mode.
3 • Push [F-7].
4 • Push [F-7].
5 • Push [F-7].
6 • Push [F-7].
7 1) Set one SSG as:
2) Turn the main dial to adjust the AF output signal.
3) Push [F-7].
8 1) Set one SSG as:
2) Turn the main dial to adjust the AF output signal.
3) Push [F-7].
9 1) Set one SSG as:
2) Turn the main dial to adjust the AF output signal.
3) Push [F-7].
10 1) Set one SSG as:
2) Turn the main dial to adjust the AF output signal.
3) Push [F-7].
11 1) Set one SSG as:
2) Turn the main dial to adjust the AF output signal.
3) Push [F-7].
OPERATION
three-port junction pad (T-pad).
• "1st Mixer A(0.03-1.6)" is displayed.
• "1st Mixer A(1.6-2.0)" is displayed.
• "1st Mixer A(2.0-4.0)" is displayed.
• "1st Mixer A(4.0-5.8)" is displayed.
• "1st Mixer A(5.8-8.0)" is displayed.
• Frequency: 7.2215 MHz
• Level: –10 dBm
another SSG as:
• Frequency: 7.3215 MHz
• Level: –10 dBm
• "1st Mixer A(8.0-12.0)" is displayed.
• Frequency: 10.2215 MHz
• Level: –10 dBm
another SSG as:
• Frequency: 10.3215 MHz
• Level: –10 dBm
• "1st Mixer A(12.0-15.0)" is displayed.
• Frequency: 14.2515 MHz
• Level: –10 dBm
another SSG as:
• Frequency: 14.3515 MHz
• Level: –10 dBm
• "1st Mixer A(15.0-19.0)" is displayed.
• Frequency: 18.2515 MHz
• Level: –10 dBm
another SSG as:
• Frequency: 18.3515 MHz
• Level: –10 dBm
• "1st Mixer A(19.0-22.0)" is displayed.
• Frequency: 21.2515 MHz
• Level: –10 dBm
another SSG as:
• Frequency: 21.3515 MHz
• Level: –10 dBm
• "1st Mixer A(22.0-25.0)" is displayed.
[1st Mixer A(0.03-1.6)]
[1st Mixer A(1.6-2.0)]
[1st Mixer A(2.0-4.0)]
[1st Mixer A(4.0-5.8)]
[1st Mixer A(5.8-8.0)]
[1st Mixer A(8.0-12.0)]
[1st Mixer A(12.0-15.0)]
[1st Mixer A(15.0-19.0)]
[1st Mixer A(19.0-22.0)]
3-16
ADJUSTMENT
VALUE
ITEM
–
Push [F-1].
–
Push [F-7].
Push [F-7].
Push [F-7].
Push [F-7].
Minimum
output level
Minimum
output level
Minimum
output level
Minimum
output level
Minimum
output level
–