Agc Function Control; D Selecting The Agc Time Constant Preset Value; D Setting The Agc Time Constant - Icom IC-7760 Basic Manual

4
RECEIVING AND TRANSMITTING

AGC function control

SSB, CW, RTTY, PSK, and AM modes
The Automatic Gain Control (AGC) function controls
receiver gain to produce a constant audio output level,
even when the received signal strength greatly varies.
L Each mode memorizes the AGC setting.
D Selecting the AGC time constant preset
value
The transceiver has FAST, MID, and SLOW preset
AGC settings for all modes, except in the FM mode.
1. Select the operating band and mode.
(Example: SSB, 14 MHz band)
2. Touch [AGC] to select the desired time constant.
L Touching [AGC] selects FAST, MID, or SLOW.
L For the FM mode, FAST is fixed.

D Setting the AGC time constant

You can set the preset AGC time constant to a desired
value.
1. Select the operating band and mode.
(Example: SSB, 14 MHz band)
2. Touch [AGC] for 1 second.
• Opens the AGC screen.
3. Touch FAST, MID, or SLOW. (Example: MID)
4. Rotate
MAIN DIAL
L You can also select "OFF."
See the table described below on adjustable time
constants.
You can reset to the default setting
by touching this key for 1 second.
5. To close the AGC screen, push
Selectable AGC Time constant (unit: seconds)
Mode Default
0.3 (FAST)
SSB 2.0 (MID)
6.0 (SLOW)
0.1 (FAST)
CW
RTTY 0.5 (MID)
PSK
1.2 (SLOW)
3.0 (FAST)
AM 5.0 (MID)
7.0 (SLOW)
FM 0.1 (FAST)
NOTE: While you are receiving weak signals, and
a strong signal is momentarily received, the AGC
function quickly decreases the receiver gain. When
that signal disappears, the transceiver may not
receive weak signals because of the AGC action. In
that case, select FAST, or touch [AGC] for 1 second
to open the AGC screen, and then set the time
constant to "OFF."
4-2
to set the time constant.
.
EXIT
Adjustable time constant
OFF, 0.1, 0.2, 0.3, 0.5, 0.8, 1.2,
1.6, 2.0, 2.5, 3.0, 4.0, 5.0, or 6.0
OFF, 0.1, 0.2, 0.3, 0.5, 0.8, 1.2,
1.6, 2.0, 2.5, 3.0, 4.0, 5.0, or 6.0
OFF, 0.3, 0.5, 0.8, 1.2, 1.6, 2.0,
2.5, 3.0, 4.0, 5.0, 6.0, 7.0, or 8.0
Fixed