Agc Function Control - Icom IC-9700 Basic Manual

4
RECEIVING AND TRANSMITTING

AGC function control

SSB, CW, RTTY and AM modes
The AGC (Automatic Gain Control) controls receiver
gain to produce a constant audio output level, even
when the received signal strength greatly varies.
L Each band 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 for the FM, DV
and DD modes.
1. Select the operating mode.
(Example: SSB)
2. Push .
FUNCTION
• Opens the FUNCTION screen.
3. Touch [AGC] to select the desired time constant.
L Touching [AGC] selects FAST, MID or SLOW.
LFor FM, DV and DD modes, FAST is fixed.
4. To close the FUNCTION screen, push
NOTE: While you are receiving weak signals, and a strong
signal is momentarily received, the AGC function quickly
reduces the receiver gain. When that signal disappears,
the transceiver may not receive the weak signal because
of the AGC action. In that case, select FAST, or touch
[AGC] for 1 second to open the AGC screen, and then
select OFF.
D Setting the AGC time constant
You can set the preset AGC time constant to the
desired value.
1. Select the operating mode.
(Example: SSB)
2. Push
• Opens the FUNCTION screen.
3. Touch [AGC] for 1 second.
• Opens the AGC (SSB) screen.
4. Touch FAST, MID or SLOW.
(Example: MID)
5. Rotate
6. To close the AGC (SSB) screen, push
• Selectable AGC Time constant (unit: seconds)
.
EXIT
Mode
LSB
USB
CW/RTTY
4-2
.
FUNCTION
to set the time constant.
MAIN DIAL
Default
0.3 （FAST）
2.0 （MID）
6.0 （SLOW）
0.1 （FAST）
0.5 （MID）
1.2 （SLOW）
3.0 （FAST）
5.0 （MID）
AM
7.0 （SLOW）
0.1 （FAST）
FM
0.1 （FAST）
DV
0.1 （FAST）
DD
You can reset
to the default
settings by
touching this key
for 1 second.
.
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
Fixed
Fixed