Icom IC-7700 Service Manual page 28

4-7-2 AUTOMATIC ADJUSTMENTS (RECEIVER)
ADJUSTMENT ADJUSTMENT CONDITION
TOTAL GAIN 1 • Receiving
(PREPARATION)
HF (P.AMP OFF) 1 • Receiving
HF (P.AMP ON) 2 • Receiving
50MHz (P.AMP 3 • Receiving
OFF)
50MHz (P.AMP 4 • Receiving
ON)
EXTERNAL AGC 1 • Receiving
HF S-METER 1 • Receiving
HF (S0 LEVEL)
HF (S9 LEVEL) 2 • Receiving
HF (S9+60 dBu 3 • Receiving
LEVEL)
50MHz 4 • Receiving
S-METER
50MHz (S0
LEVEL)
50MHz (S9 5 • Receiving
LEVEL)
50MHz (S9+60 dBu 6 • Receiving
LEVEL)
OPERATION
1) Connect an AC millivoltmeter to
[EXT-SP].
2) Connect an SSG to the [ANT1] and
set it as;
Frequency : 14.1515 MHz
Modulation : None
1) Set the SSG as;
Level : +60 dBµ
2) Set the audio output level to 0 dB
(Set it as reference).
3) Set the SSG as;
Level : "OFF"
4) Adjust the AF output level using
[MAIN DIAL], then push [F-7] key.
• Adjust the AF output level using
[MAIN DIAL], then push [F-7] key.
• Adjust the AF output level using
[MAIN DIAL], then push [F-7] key.
• Adjust the AF output level using
[MAIN DIAL], then push [F-7] key.
1) Set the SSG as;
Level : +70 dBµ
2) Push [F-7] key.
3) W a i t u n t i l t h e b e e p " P i ! "
s o u n d s ( a p p r o x . 2 0 s e c . )
NEVER CHANGE the SSG output
level until the beep souds.
1) Set the SSG as;
Level : "OFF"
2) Push [F-7] key. (the beep "Pi!" sounds)
3) Soon, another beeps "PiPi!" sound.
NEVER CHANGE the SSG output
level until the 2nd beep souds.
1) Set the SSG as;
Level : +34 dBµ
2) Push [F-7] key. (the beep "Pi!" sounds)
3) Soon, another beeps "PiPi!" sound.
NEVER CHANGE the SSG output
level until the 2nd beep souds.
1) Set the SSG as;
Level : +94 dBµ
2) Push [F-7] key. (the beep "Pi!" sounds)
3) Soon, another beeps "PiPi!" sound.
NEVER CHANGE the SSG output
level until the 2nd beep souds.
1) Set the SSG as;
Frequency : 50.1515 MHz
Modulation : None
Level : "OFF"
2) Push [F-7] key. (the beep "Pi!" sounds)
3) Soon, another beeps "PiPi!" sound.
NEVER CHANGE the SSG output
level until the beep souds.
1) Set the SSG as;
Level : +34 dBµ
2) Push [F-7] key. (the beep "Pi!" sounds)
3) Soon, another beeps "PiPi!" sound.
NEVER CHANGE the SSG output
level until the beep souds.
1) Set the SSG as;
Level : +94 dBµ
2) Push [F-7] key. (the beep "Pi!" sounds)
3) Soon, another beeps "PiPi!" sound.
NEVER CHANGE the SSG output
level until the beep souds.
4) (Returns to adjustment main menu)
4 - 16
ADJUSTMENT
VALUE
ITEM
– –
[Total Gain HF
PRE OFF]
–30 dB
[Total Gain HF
PRE ON]
[Total Gain 50M
PRE OFF]
[Total Gain 50M
PRE ON]
(Automatic
[AGC]
adjustment)
[HF S0 LEVEL]
(Automatic
[HF S9 LEVEL]
adjustment)
[ HF S9+60
LEVEL]
[50M S0 LEVEL]
(Automatic
[50M S9 LEVEL] adjustment)
[50MHz (S9+60
dBu LEVEL)