Lock Function; Monitor Function; Aquaquake Water Draining Function; Backlight Setting - Icom IC-M91D Instruction Manual

5
BASIC OPERATION
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Lock function

This function electronically locks all keys (except for [PTT],
[DISTRESS] and [ ]) to prevent accidental channel changes
and function access.
➥
Push [CLEAR/
ON and OFF.
• The lock function is automatically released when DSC call is
received, or [DISTRESS] is pushed.
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Monitor function

The Monitor function opens the squelch by holding down
[VOL/SQL] for 1 second.
• " " appears while the function is activated.
The function can be set to "PUSH" or "HOLD" in the following
manner.
q
Select "Configuration" in the "MENU" screen.
w
Select "Monitor" to enter the "Push" or "Hold" selecting mode.
• Push: The monitor function is activated by holding down [VOL/SQL]
for 1 second. The squelch opens while holding down the key.
• Hold: The monitor function is activated by holding down [VOL/
SQL] for 1 second. The squelch stays open until any key
is pushed.
15
] for 1 second to turn the lock function
Displayed when
the lock function
is activated.
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AquaQuake water draining
function
The AquaQuake water draining function clears water away
from the speaker grill. Without this function, water may muffl e
the sound coming from the speaker. The transceiver emits a
vibrating beep when this function is activated.
➥
While holding down [AQUA], the AquaQuake function is acti-
vated to clear water away from the speaker grill.
• Beep sounds, regardless of the volume level setting.
• Activates for 10 seconds in maximum to drain water.
• The transceiver never accepts key operation while the Aqua-
Quake function is activated.
• The AquaQuake function can not be activated when an optional
speaker-microphone is connected.
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Backlight setting

This function lights the function display and keys, and it is
convenient for night-time operation.
q
Select [BKLT] to enter the backlight adjusting mode.
w
Push [∫]/[√] or [Ω]/[≈] to adjust the brightness level be-
tween 1(minimum) to 7 (maximum) or OFF.
• The default setting is 4.
• The display returns automatically to the main menu after 5 sec-
onds without no key operation is been performed.
• The backlight automatically turns OFF when no key operation
is performed for 5 seconds.