Agc Function; Dagc Speed Selection; D Setting The Agc Time Constant - Icom IC-7100 Advanced Instructions

Previous view
5
FUNCTIONS FOR RECEIVE

AGC function

The AGC (Auto Gain Control) controls receiver gain to
produce a constant audio output level, even when the
received signal strength greatly varies.
The transceiver has 3 pre-set AGC time constants: fast,
mid and slow for SSB, CW, RTTY and AM modes.
In the FM , WFM and DV modes, the AGC time con-
stant is fixed as "FAST" (0.1 second).
D AGC speed selection
On the Mode selection screen, select either the SSB,
q
CW, RTTY or AM mode. (p. 3-17)
Push (C) one or more times to select the
w
MENU
"M-2" screen (M-2 menu).
Touch [AGC]( D) to select AGC-F (FAST), AGC-M
e
(MID) or AGC-S (SLOW).
"AGC OFF" appears when the selected AGC speed's
time constant is set to OFF.

D Setting the AGC time constant

On the Mode selection screen, select either the SSB,
q
CW, RTTY or AM mode. (p. 3-17)
Push (C) one or more times to select the
w
MENU
"M-2" screen (M-2 menu).
Touch [AGC]( D) for 1 second to display the "AGC"
e
screen.
Touch either [FAST] , [MID] or [SLOW](D) to select
r
the desired AGC speed to be set.
• The selected AGC speed's time constant is highlighted.
Rotate the Dial to set the selected time constant.
t
• AGC time constant can be set to between 0.1 to 8.0 sec-
onds (depending on the mode) or turned OFF.
• If desired, touch [DEF](D) for 1 second to reset to the
default setting for the selected time constant.
If desired, select another mode (any other than the
y
FM, WFM or DV), then repeat steps e and r.
Push (C) to exit the "AGC" screen.
u
MENU
• Selectable AGC time constant
Mode Default
0.3 (FAST)
SSB 2.0 (MID)
6.0 (SLOW)
0.1 (FAST)
CW/RTTY 0.5 (MID)
1.2 (SLOW)
3.0 (FAST)
AM 5.0 (MID)
7.0 (SLOW)
FM/WFM/DV 0.1 (FAST)
(unit: seconds)
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, 0.3, 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
L eft D isplay
C enter
• When AGC-M (MID) is selected
Selected AGC speed's time constant display
• When AGC-F (FAST) is selected
• When AGC-S (SLOW) is selected
For your information
When you are receiving a weak signal, 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, hold
down [AGC](D) for 1 second, and rotate the Dial to
set the time constant to OFF.
5-3
The L, R, C or D in the
R ight
instructions indicate the
part of the controller.
L: Left side
R: Right side
C: Center bottom
D: Display (Touch screen)
Touch [AGC] for
1 second
Selected mode