Icom IC-7851 - Page 29

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