I Functions For Receive - Icom IC-M802 Instruction Manual

I 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
and OFF.
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
] to switch the function ON and
NB
OFF.
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
and OFF.
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
mode, as shown at right.
] to switch the function ON
] to switch the function ON
] to select the RF gain set
RECEIVE AND TRANSMIT
• "SQL" appears when the squelch function is turned ON.
• "NB" appears when the squelch function is turned ON.
A G C
• " " appears when the squelch function is turned OFF.
w Rotate [CH] selector to set the desired minimum
cutting level.
• "0" to "9" are available.
• S-meter shows the minimum permitted level.
e Push [SET] to exit the RF gain set mode.
4
[2 ]
SQL
[F]
[1 ]
NB
[F]
[5 ]
AGC
[F]
11