ICOM iM304 User Manual

9

3

BASIC OPERATION

■ 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 [Y

Y] or [Z

Z] to ad-

just the brightness of the LCD and key backlight.

• The backlight is selectable in 3 levels and OFF.

■ AquaQuake water draining

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]