Icom IC-M801E, Инструкция по эксплуатации

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11
4
RECEIVE AND TRANSMIT
4
■
Functions for receive
D D
Squelch function
The squelch function detects signals with voice com-
ponents and squelches (mutes) unwanted signals
such as unmodulated beat signals. This provides
quiet stand-by.
When you need to receive weak signals, the squelch
should be turned OFF.
➥
Push [
F
] then [2
SQL
] to switch the function ON
and OFF.
• See page 42 for the squelch level adjustment.
• “ SQL ” appears when the squelch function is turned ON.
[2
SQL
] [
F
]
D D
Noise blanker
The noise blanker function reduces pulse type noise
such as that coming from engine ignitions, etc.
The noise blanker may distort reception of strong sig-
nals. In such cases, the noise blanker should be
turned OFF.
➥
Push [
F
] then [1
NB
] to switch the function ON and
OFF.
• See page 42 for the noise blanker level adjustment.
• “ NB ” appears when the NB function is turned ON.
[1
NB
] [
F
]
D D
AGC OFF function
The receive gain is automatically adjusted according
to received signal strength with the AGC (Automatic
Gain Control) function to prevent distortion from
strong signals and to obtain a constant output level.
When receiving weak signals with adjacent strong
signals or noise, the AGC function may reduce the
sensitivity. In this situation, the AGC function should
be deactivated.
➥
Push [
F
] then [5
AGC
××
] to switch the function ON
and OFF.
• “ ” appears when the AGC function is turned OFF.
A G C
[5
AGC
×
] [
F
]
D D
RF gain setting
The receiver gain can be reduced with the RF gain
setting. This may help to remove undesired weak sig-
nals while monitoring strong signals.
Usually, the AGC function reduces the RF gain ac-
cording to the receive signal strength and these weak
signals are removed. However, during no signal re-
ception, these weak signals may not be heard.
In such cases, the RF gain may be useful for setting a
minimum level at which to hear signals.
q
Push [
F
] then [6
RF
-
G
] to select the RF gain set
mode, as shown below.
w
Rotate [CH] to set the desired minimum cutting
level.
• “0 (low sensitivity)” to “9 (max. sensitivity)” are available.
• S-meter shows the minimum permitted level.
e
Push any key to exit the RF gain set mode.
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