4
RECEIVING AND TRANSMITTING
4-4
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.
L
For the FM mode, the FAST time constant is fixed.
FUNCTION screen (SSB mode)
4. To close the FUNCTION screen,
EXIT
.
D
Setting the AGC time constant
You can set the preset AGC time constant to a desired
value.
1. Select the operating mode.
(Example: SSB)
2. Push
FUNCTION
.
•Opens the FUNCTION screen.
3. Touch [AGC] for 1 second.
•Opens the AGC (SSB) screen.
4. Touch either FAST, MID or SLOW to select the
desired AGC time constant.
(Example: MID)
FUNCTION screen (SSB mode)
5. Rotate
MAIN DIAL
to set the time constant.
L
The adjustable time constants are described in the
table below.
6. To close the AGC (SSB) screen, push
EXIT
.
•
Selectable AGC Time constant (unit: seconds)
Mode
Default
Adjustable time constant
SSB
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 (SSB mode)
You can
reset to the
default setting
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.
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