Icom ID-31A

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BASIC OPERATION
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■ Setting squelch level
The squelch function mutes the noise or received audio sig-
nal, depending on the signal strength and the squelch control
setting to cut off the noise output.
While holding down [SQL], rotate [DIAL] to select the ➥
squelch level.
 •Whileholdingdown[SQL],rotate[DIAL]oneclicktodisplaythe
squelch level.
 •“LEVEL1”isloosesquelch(forweaksignals)and“LEVEL9”is
tight squelch (for strong signals).
 •“AUTO” indicates automaticlevel adjustment by anoise pulse
counting system.
 •“OPEN”indicatesacontinuouslyopensetting.(Thisoptionisnot
selectable in the DV mode.)
■ Monitor function
This function is used to listen to weak signals without disturb-
ing the squelch setting, or having to open the squelch manu-
ally even when mute functions such as the tone squelch are
in use.
Hold down [SQL] to monitor the operating frequency. ➥
 •The1stsegmentoftheS-meterblinks.
MENU ➪FUNCTION ➪Monitor (p. 44)
The [SQL] key can be set to ‘sticky’ operation in FUNC-
TION menu.
[SQL]
[DIAL]
Automatic squelch
Maximumlevel
[SQL]
The first segment blinks