Icom IC-7300, Основное руководство

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4
RECEIVING AND TRANSMITTING
4-2
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
SelectingtheAGCtimeconstant
presetvalue
The transceiver has 3 preset AGC settings for all
modes except for the FM mode (time constants: 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 time constant.
L
Touching [AGC] selects FAST, MID or SLOW.
L
FortheFMmode,FASTisfixed.
FUNCTIONscreen(SSBmode)
4. To close the FUNCTION screen,
EXIT
.
D
SettingtheAGCtimeconstant
You can set the preset AGC time constant to the
desired value.
1. Select the operating mode.
(Example:SSB)
2. Push
FUNCTION
.
•Opens the FUNCTION screen.
3. Touch [AGC] for 1 second.
•OpenstheAGC(SSB)screen.
4. Touch either FAST, MID or SLOW to select the
desired AGC to adjust the time constant.
(Example: MID)
FUNCTIONscreen(SSBmode)
5. Rotate
MAIN DIAL
to set the time constant.
L
The adjustable time constants are described in the
table below.
6. ToclosetheAGC(SSB)screen,push
EXIT
.
• SelectableAGCTimeconstant(unit:seconds)
Mode Default Adjustabletimeconstant
LSB
USB
0.3 （ FAST ）
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
2.0 （ MID ）
6.0 （
SLOW
）
CW/RTTY
0.1 （ FAST ）
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
0.5 （ MID ）
1.2 （
SLOW
）
AM
3.0
（
FAST
）
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
5.0 （ MID ）
7.0 （
SLOW
）
FM
0.1
（
FAST
）
Fixed
AGC(SSB)screen(SSBmode)
You can reset
to the default
settings by
touching this
key for 1
second.
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.