Agc Function - Icom IC-756PRO Instruction Manual

5
RECEIVE AND TRANSMIT

AGC function

The AGC (auto gain control) controls receiver gain to
produce a constant audio output level even when the
received signal strength is varied by fading, etc.
The transceiver has 3 AGC characteristics (time con-
stant; fast, mid, slow) for non-FM mode.
The FM mode AGC time constant is fixed as 'FAST'
(0.1 sec.) and AGC time constant cannot be se-
lected.
• AGC time constant selection
q Select non-FM mode.
w Push [AGC] one or more times to select AGC fast,
AGC medium (MID) or AGC slow.
• Selectable AGC time constant
Mode Default
0.3 (FAST)
SSB 2.0 (MID)
6.0 (SLOW)
0.1 (FAST)
CW 0.5 (MID)
1.2 (SLOW)
0.1 (FAST)
RTTY 0.5 (MID)
1.2 (SLOW)
3.0 (FAST)
AM 5.0 (MID)
7.0 (SLOW)
FM 0.1 (FAST)
30
Medium AGC time constant
Slow AGC time constant
Fast AGC time constant
(unit: sec.)
Selectable AGC 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, 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, 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, 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, 8.0
Fixed
• Setting the AGC time constant
q Select the desired mode except FM mode.
w Push [AGC] for 2 sec. to enter AGC set mode.
qr≥qot≥pp
qr≥wpt≥pp
e Push [AGC] one or more times to select FAST time
constant.
r Rotate the tuning dial to set the desired time con-
stant for 'AGC FAST.'
• AGC time constant can be set between 0.1 to 8.0 sec.
(depends on mode) or turned OFF.
• Push [(F-3)DEF] to select a default value.
t Push [AGC] to select medium time constant.
y Rotate the tuning dial to set the desired time con-
stant for 'AGC MID.'
• AGC time constant can be set between 0.1 to 8.0 sec.
(depends on mode) or turned OFF.
• Push [(F-3)DEF] to select a default value.
u Push [AGC] to select slow time constant.
i Rotate the tuning dial to set the desired time con-
stant for 'AGC SLOW.'
• AGC time constant can be set between 0.1 to 8.0 sec.
(depends on mode) or turned OFF.
• Push [(F-3)DEF] to select a default value.
o Select another mode except FM. Repeat steps e
to o if desired.
!0 Push [EXIT] to exit the AGC set mode screen.
qw pp