ICOM 325100 Manuale Utente

9

3

BASIC OPERATION

■ Audio mute function

This function temporarily mutes the audio without dis-
turbing the volume setting.

➥  Push  [FUNC] 

 then [

Y

 D(MUTE)] 

 to 

mute the audio.

  • 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] one or more 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 ‘18’ 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] one or more 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.

While the squelch attenuator is turned ON.
([DIAL] is set between the 12 o’clock and fully clockwise positions.)

Appears

While the S-meter squelch is turned ON.
([DIAL] is set between the 12 o’clock and fully clockwise positions.)

Appears

Appears

Push         then        .

S-meter squelch