Agc Function; D Selecting The Preset Value; D Adjusting The Agc Time Constant; D Setting The Agc Time Constant Preset Value - Icom IC-7800 Instruction Manual

5
FUNCTIONS FOR RECEIVE

■ AGC function

[AGC] control for main
[AGC VR] for main [AGC VR] for sub

D Selecting the preset value

D Adjusting the AGC time constant

D Setting the AGC time constant preset value

• Selectable AGC time constant
Mode Default Selectable AGC time constant
0.3 (FAST)
0.1, 0.2, 0.3, 0.5, 0.8, 1.2, 1.6, 2.0,
SSB 2.0 (MID)
2.5, 3.0, 4.0, 5.0, 6.0
6.0 (SLOW)
0.1 (FAST)
0.1, 0.2, 0.3, 0.5, 0.8, 1.2, 1.6, 2.0,
CW 0.5 (MID)
2.5, 3.0, 4.0, 5.0, 6.0
1.2 (SLOW)
0.1 (FAST)
RTTY 0.1, 0.2, 0.3, 0.5, 0.8, 1.2, 1.6, 2.0,
0.5 (MID)
PSK 2.5, 3.0, 4.0, 5.0, 6.0
1.2 (SLOW)
3.0 (FAST)
0.3, 0.5, 0.8, 1.2, 1.6, 2.0, 2.5, 3.0,
AM 5.0 (MID)
4.0, 5.0, 6.0, 7.0, 8.0
7.0 (SLOW)
FM 0.1 (FAST) Fixed
[AGC] control for sub
[AGC]
(unit: sec.)
The AGC (auto gain control) controls receiver gain to
produce a constant audio output level even when the
received signal strength varies greatly.
The transceiver has 3 preset AGC characteristics (time
constant: fast, mid, slow) for non-FM mode.
The FM mode AGC time constant is fixed as 'FAST'
(0.1 seconds) and AGC time constant cannot be se-
lected.
q Select non-FM mode.
w Push [AGC] several times to select AGC fast, AGC
medium (MID) or AGC slow.
• Hold down [AGC VR] for 1 second to turn the AGC func-
tion OFF.
q Select non-FM mode.
w Push [AGC VR], then rotate [AGC] control to adjust
the AGC time constant.
• [AGC VR] indicator above the switch lights green.
q Select the desired mode (not FM mode).
w Hold down [AGC] for 1 second to enter AGC set
mode.
e Push [AGC] several times to select FAST time con-
stant.
r Rotate the main dial to set the desired time constant
for 'AGC FAST.'
• AGC time constant can be set between 0.1 to 8.0 sec-
onds (depends on mode) or turned OFF.
• Hold down [F-4•DEF] for 1 second to select a default
value.
t Push [AGC] to select medium time constant.
y Rotate the main dial to set the desired time constant
for 'AGC MID.'
• AGC time constant can be set between 0.1 to 8.0 sec-
onds (depends on mode) or turned OFF.
• Hold down [F-4•DEF] for 1 second to select a default
value.
u Push [AGC] to select slow time constant.
i Rotate the main dial to set the desired time constant
for 'AGC SLOW.'
• AGC time constant can be set between 0.1 to 8.0 sec-
onds (depends on mode) or turned OFF.
• Hold down [F-4•DEF] for 1 second to select a default
value.
o Select another mode (not FM). Repeat steps e to
i if desired.
!0 Push [EXIT/SET] to exit the AGC set mode screen.
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