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3
BASIC OPERATION
3
■Microphone lock function
The microphone lock function electrically locks [Y]and [Z]
keys on the supplied microphone. This prevents accidental
channel changes and function access.
➥While pushing and holding [HI/LO] on the microphone,
turn power ON to toggle the Microphone lock function ON
and OFF.
■Display backlighting
The function display and keys can be backlit for better visibil-
ity under low light conditions.
➥While pushing and holding [SCAN], push [YY]or [ZZ]to ad-
just the brightness of the LCD and key backlight.
•The backlight is selectable in 3 levels and OFF.
■AquaQuake water drainingfunction
The IC-M304 uses a new technology to clear water away
from the speaker grill: AquaQuake. AquaQuake helps drain
water away from the speaker housing (water that might oth-
erwise muffle the sound coming from the speaker). The IC-
M304 emits a vibrating noise when this function is being
used.
➥While pushing and holding [Y]and [Z], turn power ON.
•A low beep tone sounds while [Y]or [Z]keys are held to drain
water, regardless of [VOL]control setting.
•The transceiver never accepts a key operation while the
AquaQuake function is activated.
•“ ” scrolls at the channel comment indicator.
Scrolls
[Y]/[Z][HI/LO]