Icom IC-7851 - Page 31

3-18
ADJUSTMENT OPERATION
ADJUSTMENT
ITEM
VALUE
( Continued from
the previous
page.)
10 1) Set one SSG as:
• Frequency: 25.0515 MHz
• Level: –10 dBm
another SSG as:
• Frequency: 25.1515 MHz
• Level: –10 dBm
2) Turn the main dial to adjust the AF output signal.
3) Push [F-7].
• “1st Mixer B(25.0-30.0)” is displayed.
[1st Mixer B(22.0-25.0)]
Minimum
output level
11 • Push [F-7].
• “Total Gain A HF PRE OFF 15k ref” is displayed.
[1st Mixer B(25.0-30.0)]
Minimum
output level
MAIN
TOTAL GAIN
12 1) Connect an SSG to the [ANT1] connector, and then set
it as:
• Frequency: 14.1515 MHz
• Level: +60 dBµ
2) Push [F-7].
• “Total Gain A HF PRE OFF 15k set” is displayed.
[Total Gain A HF PRE
OFF 15k ref]
Push [F-7].
13 1) Set the SSG as:
• Level: OFF
2) Push [F-7].
• “Total Gain A HF PRE1 ref” is displayed.
[Total Gain A HF PRE
OFF 15k set]
Push [F-7].
14 1) Set the SSG as:
• Frequency: 14.1515 MHz
• Level: +60 dBµ
2) Push [F-7].
• “Total Gain A HF PRE1 set” is displayed.
[Total Gain A HF PRE1
ref]
Push [F-7].
15 1) Set the SSG as:
• Level: OFF
2) Push [F-7].
• “Total Gain A 50M PRE OFF ref” is displayed.
[Total Gain A HF PRE 1
set]
Push [F-7].
16 1) Set the SSG as:
• Frequency: 50.1515 MHz
• Level: +60 dBµ
2) Push [F-7].
• “Total Gain A 50M PRE OFF set” is displayed.
[Total Gain A 50M PRE
OFF ref]
Push [F-7].
17 1) Set the SSG as:
• Level: OFF
2) Push [F-7].
• “Total Gain A 50M PRE1 ref” is displayed.
[Total Gain A 50M PRE
OFF set]
Push [F-7].
18 1) Set the SSG as:
• Frequency: 50.1515 MHz
• Level: +60 dBµ
2) Push [F-7].
• “Total Gain A 50M PRE1 set” is displayed.
[Total Gain A 50M PRE1
ref]
Push [F-7].
19 1) Set the SSG as:
• Level: OFF
2) Push [F-7].
• “Total Gain A HF PRE OFF 6k ref” is displayed.
[Total Gain A 50M PRE1
set]
Push [F-7].
20 1) Set the SSG as:
• Frequency: 14.1515 MHz
• Level: +60 dBµ
2) Push [F-7].
• “Total Gain A HF PRE OFF 6k set” is displayed.
[Total Gain A HF PRE
OFF 6k ref]
Push [F-7].
21 1) Set the SSG as:
• Level: OFF
2) Push [F-7].
• “Total Gain A HF PRE OFF 3k ref” is displayed.
[Total Gain A HF PRE
OFF 6k set]
Push [F-7].
22 1) Set the SSG as:
• Frequency: 14.1515 MHz
• Level: +60 dBµ
2) Push [F-7].
• “Total Gain A HF PRE OFF 3k set” is displayed.
[Total Gain A HF PRE
OFF 3k ref]
Push [F-7].
• RX ADJUSTMENTS (continued)