Agc Function; Agc Speed Selection; Setting The Agc Time Constant - Icom IC-9100 Instruction Manual

The AGC (Auto Gain Control) controls receiver gain to
produce a constant audio output level, even when the
received signal strength varies greatly.
The transceiver has 3 pre-set AGC time constants: fast,
In the FM and DV modes, the AGC time constant is
fixed as "FAST" (0.1 second).
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w Push [MENU] to display the "M1" screen (Menu 1),
then push [AGC](F-1) one or more times to select
AGC fast ( ), AGC mid ( ) or AGC slow ( ).
"AGC OFF" appears when the selected AGC
speed's time constant is set to OFF.
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w Push [MENU] to display the "M1" screen (Menu 1),
then hold down [AGC](F-1) for 1 second to display
the "AGC" screen.
e Push either [FAST](F-2), [MID](F-3) or [SLOW](F-4)
to select the desired AGC speed to be set.
An underline appears below the time constant display.
r Rotate [MAIN DIAL] to set the desired time con-
stant.
seconds (depending on the mode) or turned OFF.
, [MID](F-3) or [SLOW](F-4) for
1 second to reset to the default setting for the selected
time constant, if desired.
t Select another mode (except for FM and DV), then
repeat steps e and r, if desired.
y Push [MENU] to save, and exit the "AGC" screen.
Mode
0.3 (FAST)
OFF, 0.1, 0.2, 0.3, 0.5, 0.8, 1.2,
SSB 2.0 (MID)
1.6, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0
6.0 (SLOW)
0.1 (FAST)
OFF, 0.1, 0.2, 0.3, 0.5, 0.8, 1.2,
0.5 (MID)
1.6, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0
1.2 (SLOW)
3.0 (FAST)
OFF, 0.3, 0.5, 0.8, 1.2, 1.6, 2.0,
AM 5.0 (MID)
2.5, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0
7.0 (SLOW)
FM/DV 0.1 (FAST) Fixed
(unit: seconds)
For your information
When you are receiving a weak signal, and a strong
signal is momentarily received, the AGC function
quickly reduces the receiver gain. When that sig-
nal disappears, the transceiver may not receive
the weak signal because of the AGC action. In that
case, hold down [AGC](F-1) for 1 second, and ro-
tate [MAIN DIAL] to set the time constant to OFF.
FUNCTIONS FOR RECEIVE
[MENU] [AGC]
M1
A G C D U P C O M P T B W
Hold down
F A S T M I D
AGC
0 . 3 s 2 . 0 s
Appears under the selected AGC
speed's time constant display.
F A S T M I D
AGC
0 . 3 s 2 . 0 s
F A S T M I D
AGC
0 . 3 s 2 . 0 s
5
S C P
S L O W S S B
6 . 0 s
Selected mode
S L O W S S B
6 . 0 s
S L O W S S B
6 . 0 s
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