Agc Function Control; D Selecting The Agc Time Constant Preset Value; D Setting The Agc Time Constant - Icom IC-7300 HF Plus Full Manual

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4
RECEIVING AND TRANSMITTING

AGC function control

The AGC (Automatic Gain Control) controls receiver
gain to produce a constant audio output level, even
when the received signal strength varies greatly.
D Selecting the AGC time constant
preset value
The transceiver has 3 preset AGC settings for all
modes except the FM mode. The time constants are
FAST, MID and SLOW.
1. Select the operating mode.
(Example: SSB)
2. Push .
FUNCTION
• Opens the FUNCTION screen.
3. Touch [AGC] to select the desired FAST, MID or
SLOW time constant.
LFor the FM mode, the FAST time constant is fixed.
FUNCTION screen (SSB mode)
4. To close the FUNCTION screen,

D Setting the AGC time constant

You can set the preset AGC time constant to a desired
value.
1. Select the operating mode.
2. Push
3. Touch [AGC] for 1 second.
4. Touch either FAST, MID or SLOW to select the
.
EXIT
5. Rotate
6. To close the AGC (SSB) screen, push
• Selectable AGC Time constant (unit: seconds)
NOTE: When 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 the time constant setting.
4-4
(Example: SSB)
.
FUNCTION
• Opens the FUNCTION screen.
FUNCTION screen (SSB mode)
• Opens the AGC (SSB) screen.
desired AGC time constant.
(Example: MID)
AGC (SSB) screen (SSB mode)
to set the time constant.
MAIN DIAL
L The adjustable time constants are described in the
table below.
Mode Default
0.3 （FAST）
2.0 （MID）
SSB
6.0 （SLOW）
0.1 （FAST）
0.5 （MID）
CW/RTTY
1.2 （SLOW）
3.0 （FAST）
5.0 （MID）
AM
7.0 （SLOW）
0.1 （FAST）
FM
You can
reset to the
default setting
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