154 BASIC OPERATIONAdjusting the Backlight level■The function display and keys can be backlit for better visibil-ity under low light conditions.The backlight is adjustable in 7 levels and OFF.Depending on the preprogramming, the adjustment methoddiffers, as described below.Push [BKLT] to show the backlight adjustment screen. Ro-➥tate dial or push [∫]/[√]/[Ω]/[≈] to adjust the brightness ofthe LCD and key backlight, and then, push [ENT].• If no key operation is performed for about 5 seconds, the transceiversets the selected backlight level, and returns to the normal mode.AquaQuake water draining■functionThe AquaQuake water draining function clears water awayfrom the speaker grill. Without this function, water may mufflethe sound coming from the speaker. A buzzing sound is heardwhen this function is activated.q Push [MENU].w Rotate dial or push [Ω]/[≈] to select the “AQUA QUAKE,”icon and then push the softkey below the icon.• AQUAQUAKE screen is displayed.While holding down [AQUA], the AquaQuake function is➥activated to clear water away from the speaker grill.• While holding down [AQUA], a low buzzing sounds to drain wa-ter, regardless of the volume level setting.• The transceiver keys, except [DISTRESS], are disabled whilethe AquaQuake function is activated.When the AquaQuake function is activated.
