Icom IC-7000 - Manual (Page 85)

DSetting the AGC time constant
76
5
FUNCTIONS FOR RECEIVE
5
■ 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/WFM mode.
The FM/WFM modes AGC time constant is fixed as
‘FAST’ (0.1 sec.) and AGC time constant cannot be
selected.
qS elect non-FM/WFM mode with [MODE].
wSelect M - 3.
ePush [F-3 AGC] several times to select AGC fast,
AGC medium (MID) AGC slow or AGC OFF.
• “ ,” “ , ” “ ” or “ ” appears when
AGC fast, AGC medium (MID), AGC slow or AGC OFF
is selected, respectively
.
“ ” (OFF) appears when AGC time constant
OFF is set with one of FAST, MID, SLOW setting
in AGC set mode.
[MENU/GRP] [F-3]
• Push and hold [MENU/GRP] for 1 sec. once or twice
to select the menu group M.
• Push [MENU/GRP] momentarily one or more times to
select the menu M - 3.
DAGC time constant selection
qS elect the desired mode other than FM/WFM
modes.
wSelect M - 3.
ePush [F-3 AGC] for 1 sec. to enter the AGC set
mode.
rPush one of [F-2 FAST], [F-3 MID], [F-4 SLOW]
to select the desired AGC time constant.
tRotate [DIAL] to set the desired time constant.
• AGC time constants can be selected between 0.1 to
8.0 sec. (depends on mode) or turned OFF.
• Push and hold [F-2 FAST], [F-3 MID] or [F-4 SLOW]
for 1 sec. to select a default value each for fast, mid.
and slow, respectively.
ySelect another mode other than FM/WFM. Repeat
steps
r and t, if desired.
• See table to the right for available tone frequencies.
uPush [Z(
MENU / GRP
)] to exit the AGC set mode.
• Selectable AGC time constant
(unit: sec.)
[MENU/GRP] [DIAL] [F-3] [F-4] [F-2]
• Push and hold [MENU/GRP] for 1 sec. once or twice
to select the menu group M.
• Push [MENU/GRP] momentarily one or more times to
select the menu M - 3.
Mode Default Selectable AGC time constant
0.3 (FAST)
OFF, 0.1, 0.2, 0.3, 0.5, 0.8, 1.2,
SSB 2.0 (MID)
1.6, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0
6.0 (SLOW)
0.1 (FAST)
OFF, 0.1, 0.2, 0.3, 0.5, 0.8, 1.2,
CW 0.5 (MID)
1.6, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0
1.2 (SLOW)
0.1 (FAST)
OFF, 0.1, 0.2, 0.3, 0.5, 0.8, 1.2,
RTTY 0.5 (MID)
1.6, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0
1.2 (SLOW)
3.0 (FAST)
OFF, 0.3, 0.5, 0.8, 1.2, 1.6, 2.0,
AM 5.0 (MID)
2.5, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0
7.0 (SLOW)
FM/WFM 0.1 (FAST) Fixed