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4
BASIC OPERATION
■ Power ON
➥ Hold down [ ] for 1 second to turn the power ON or
OFF.
• For only IC-U80/IC-U80E:
The voltage of the battery is displayed at power ON.
This display can be turned ON or OFF in the Initial Set
mode. (p. 44)
■ Adjusting the audio level
➥ Rotate [VOL] to adjust the audio level.
• The display shows the audio level while adjusting.
• If the squelch is closed, hold down [MONI] while adjust-
ing the audio level.
■ Adjusting the squelch level
➥ While holding down [MONI], push [Y] or [Z] several
times to adjust the squelch level.
• "SqL 1" is loose squelch (for weak signals) and "SqL10"
is tight squelch (for strong signals). "SqL 0" is open
squelch.
■ Monitor function
This function is used to listen to weak signals, or to
manually open the squelch. You can use it without dis-
turbing the squelch setting, even when mute functions
such as the tone squelch are in use.
➥ Hold down [MONI] to open the squelch.
• Release [MONI] to cancel the function.
[VOL]
11
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