Icom IC-7610 Instruction Manual basic - Page 32

AGC function control, Selecting the AGC time constant, preset value

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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. DDSelecting the AGC time constant preset value The transceiver has FAST, MID and SLOW preset AGC settings for all modes, except for the FM mode. 1. Select the operating mode. (Example: SSB) 2. Touch [AGC] to sequentially select FAST, MID or SLOW. LFAST is fixed in the FM mode. DDSetting the AGC time constant You can set the preset AGC time constant. 1. Select the operating mode. (Example: SSB) 2. Touch [AGC] for 1 second. ••Opens the AGC screen. 3. Touch FAST, MID or SLOW. 4. Rotate MAIN DIAL to set the time constant. LYou can reset to the default settings by touching [DEF] for 1 second. 5. To close the AGC screen, push EXIT . ••Selectable AGC Time constant (unit: seconds) Mode LSB USB CW RTTY PSK AM FM 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） 7.0 （SLOW） 0.1 （FAST） 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 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. 4-2

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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
Selecting the AGC time constant
preset value
The transceiver has FAST, MID and SLOW preset
AGC settings for all modes, except for the FM mode.
1.
Select the operating mode.
(Example: SSB)
2.
Touch [AGC] to sequentially select FAST, MID or
SLOW.
L
FAST is fixed in the FM mode.
D
Setting the AGC time constant
You can set the preset AGC time constant.
1.
Select the operating mode.
(Example: SSB)
2.
Touch [AGC] for 1 second.
• Opens the AGC screen.
3.
Touch FAST, MID or SLOW.
4. Rotate
MAIN
DIAL
to set the time constant.
L
You can reset to the default settings by touching
[DEF] for 1 second.
5.
To close the AGC screen, push
EXIT
.
•
Selectable AGC Time constant (unit: seconds)
Mode
Default
Adjustable time constant
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
PSK
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
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.