Audio Mute Function; Squelch Attenuator; S-Meter Squelch - Icom IC-2300H Instruction Manual

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3
BASIC OPERATION

■ Audio mute function

This function temporarily mutes the audio without dis-
turbing the volume setting.
➥ Push [FUNC]
then [MUTE]
dio.
• The "MUTE" icon appears.
• Push [CLR] to cancel the function.

■ Squelch attenuator

The transceiver has an RF attenuator related to the
squelch level setting. Approximately 20 dB of attenua-
tion is obtained at the maximum setting.
Turn ON the Squelch Attenuator function:
q Push [ ] to turn OFF the power.
w While holding down [LOCK] (SET), hold down [ ] for
1 second to turn ON the power and enter the Initial
Set mode.
e Push [SET] or [MONI] several times, to select the
"SQL" item.
r Rotate [DIAL] to select "AT" (Attenuator).
t Push [ ] to exit the Initial Set mode.
y Rotate [SQL] clockwise further than the 12 o'clock
position, to activate the squelch attenuator.
• The attenuation level can be adjusted up to 20 dB
(approximately), between the 12 o'clock and fully
clockwise positions.
• When setting the squelch from the microphone, the
level greater than '17' activates the squelch attenuator.
NOTE: When using with the Monitor function.
The squelch attenuator functions even when the
Monitor function is in use. It is recommended to set
[SQL] between 10 and 12 o'clock (7 to 17 level when
it is set using the HM-133V).

■ S-meter squelch

The transceiver has an S-meter squelch. The S-meter
squelch allows you to set minimum signal level needed
to open the squelch.
Turn ON the S-meter Squelch function:
q Push [ ] to turn OFF the power.
w While holding down [LOCK] (SET), hold down [ ] for
1 second to turn ON the power and enter the Initial
Set mode.
e Push [SET] or [MONI] several times, to select the
"SQL" item.
r Rotate [DIAL] to select "SS" (S-meter squelch).
t Push [ ] to exit the Initial Set mode.
y Rotate [SQL] clockwise further than the 12 o'clock
position, to activate the S-meter squelch.
Using the HM-133V
to mute the au-
Appears
MUTE
NAR
MID
LOW
LOCK
S ET
Squelch attenuator
NAR
MID
LOW
LOCK
S ET
While the squelch attenuator is turned ON.
([DIAL] is set between the 12 o'clock and fully clockwise positions.)
MUTE
NAR
MID
LOW
LOCK
S ET
S-meter squelch
NAR
MID
LOW
LOCK
S ET
While the S-meter squelch is turned ON.
([DIAL] is set between the 12 o'clock and fully clockwise positions.)
9
Push then .
DIGITAL PRIO AO
MUTE
NAR
MID
LOW
LOCK ANM DUP T-SCAN PRIO
S ET
MONI LOW TONE M/CALL
Mute
DIGITAL PRIO AO
ANM DUP T-SCAN PRIO SCAN
MONI LOW TONE M/CALL V/ MHz
Appears
ATT AO
ANM DUP T-SCAN PRIO SCAN
MONI LOW TONE M/CALL V/ MHz
DIGITAL PRIO AO
ANM DUP T-SCAN PRIO SCAN
MONI LOW TONE M/CALL V/ MHz
Appears
S SQL
ANM DUP T-SCAN PRIO SCAN
MONI LOW TONE M/CALL V/ MHz
BUSY
SCAN
V/MHz