Icom IC-R9500 Instruction Manual - Page 76

AGC function

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5 RECEIVE FUNCTIONS ■ AGC function [AGC VR] indicator [AGC] control [AGC VR/OFF] [AGC] The AGC (auto gain control) controls receiver gain to produce a constant audio output level even when the received signal strength varies greatly. The receiver has 3 preset AGC characteristics (time constant: fast, mid, slow) for non-FM, WFM or P25 mode. The FM, WFM or P25 mode AGC time constant is fixed as 'FAST' (0.1 sec.) and AGC time constant cannot be selected. D Selecting the preset value q Select non-FM, WFM or P25 mode. wPush [AGC] several times to select AGC fast (FAST), AGC medium (MID) or AGC slow (SLOW). • Push and hold [AGC VR/OFF] for 1 sec. to turn the AGC function OFF. D Adjusting the AGC time constant q Select non-FM, WFM or P25 mode. w Push [AGC VR/OFF] once or twice to select AGC volume (VR), then rotate [AGC] control to adjust the AGC time constant. • [AGC VR] indicator lights green and "VR" appears in- stead of "FAST," "MID" or "SLOW." D Setting the AGC time constant preset value qSelect the desired mode (not FM, WFM or P25 mode). w Push and hold [AGC] for 1 sec. to enter AGC set mode. e Push [AGC] several times to select FAST time con- • Selectable AGC time constant (unit: sec.) Mode Default Selectable AGC time constant FM 0.1 (FAST) Fixed 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. (depends on mode) or turned OFF. • Push and hold [F-4•DEF] for 1 sec. to select a default WFM 0.1 (FAST) Fixed 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) SSB 0.3 (FAST) 0.1, 0.2, 0.3, 0.5, 0.8, 1.2, 1.6, 2.0, 2.0 (MID) 6.0 (SLOW) 2.5, 3.0, 4.0, 5.0, 6.0 0.1 (FAST) CW 0.5 (MID) 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 1.2 (SLOW) 0.1 (FAST) 0.1, 0.2, 0.3, 0.5, 0.8, 1.2, 1.6, 2.0, FSK 0.5 (MID) 2.5, 3.0, 4.0, 5.0, 6.0 1.2 (SLOW) P25 0.1 (FAST) Fixed 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. (depends on mode) or turned OFF. • Push and hold [F-4•DEF] for 1 sec. 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. (depends on mode) or turned OFF. • Push and hold [F-4•DEF] for 1 sec. to select a default value. o Select another mode (not FM, WFM or P25). Repeat steps e to i if desired. !0 Push [EXIT/SET] to exit the AGC set mode screen. 5-10

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■
AGC function
The AGC (auto gain control) controls receiver gain to
produce a constant audio output level even when the
received signal strength varies greatly.
The receiver has 3 preset AGC characteristics (time
constant: fast, mid, slow) for non-FM, WFM or P25
mode.
The FM, WFM or P25 mode AGC time constant is
fixed as ‘FAST’ (0.1 sec.) and AGC time constant
cannot be selected.
D
Selecting the preset value
q
Select non-FM, WFM or P25 mode.
w
Push [AGC] several times to select AGC fast
(FAST), AGC medium (MID)
or AGC slow (SLOW).
• Push and hold [AGC VR/OFF] for 1 sec. to turn the AGC
function OFF.
D
Adjusting the AGC time constant
q
Select non-FM, WFM or P25 mode.
w
Push [AGC VR/OFF] once or twice to select AGC
volume (VR), then rotate [AGC] control to adjust the
AGC time constant.
• [AGC VR] indicator lights green and “VR” appears in-
stead of “FAST,” “MID” or “SLOW.”
D
Setting the AGC time constant preset value
q
Select the desired mode (not FM, WFM or P25
mode).
w
Push and hold [AGC] for 1 sec. 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.
(depends on mode) or turned OFF.
• Push and hold [F-4•DEF] for 1 sec. 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.
(depends on mode) or turned OFF.
• Push and hold [F-4•DEF] for 1 sec. 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.
(depends on mode) or turned OFF.
• Push and hold [F-4•DEF] for 1 sec. to select a default value.
o
Select another mode (not FM, WFM or P25). Repeat
steps
e
to
i
if desired.
!
0
Push [EXIT/SET] to exit the AGC set mode screen.
[AGC]
[AGC] control
[AGC VR] indicator
[AGC VR/OFF]
5-10
5
RECEIVE FUNCTIONS
Mode
Default
Selectable AGC time constant
FM
0.1 (FAST)
Fixed
WFM
0.1 (FAST)
Fixed
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)
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)
0.1, 0.2, 0.3, 0.5, 0.8, 1.2, 1.6, 2.0,
FSK
0.5 (MID)
2.5, 3.0, 4.0, 5.0, 6.0
1.2 (SLOW)
P25
0.1 (FAST)
Fixed
• Selectable AGC time constant
(unit: sec.)