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11
3
BASIC OPERATION
■
Side tone function
When using a headset
(user supplied)
,
the transceiver outputs
your transmitted voice to the headset for monitoring. Connect
an optional headset to use this function
(The OPC-499
headset
adapter
and headset are required)
. (p. 36)
D
Setting the side tone level
q
Push
[PTT]
to transmit.
w
While transmitting, push
[
Y
]
/
[
Z
]
to adjust the level.
• ‘ST--0’ is OFF and ‘ST--10’ is the maximum level.
WARNING! NEVER
operate the transceiver with a head-
set at high volume or monitor levels for long periods of
time. If a ringing in your ears occurs, reduce the volume
or monitor level, or discontinue use.
■
LCD backlight
The IC-A15/S has an LCD backlight for convenience during
night time operation.
➥
Push
[LIGHT]
to turn the LCD
backlight ON or OFF.
IMPORTANT!
Turn OFF the LCD back-
light when no backlight is
necessary.
■
Low battery icon
The low battery icon appears or blinks when the battery
power has decreased to a specified level. The attached bat-
tery pack or battery case requires recharging or the battery
case cells need replacing.
If the batteries are not charging or replaced, even when the
low battery indicator blinks, a long beep sounds and then the
transceiver will be automatically turn OFF.
[PTT]
[
Z
]
/
[
Y
]
Side tone level is displayed
IMPORTANT!
Select ‘ST--0’ when a speaker
microphone is connected, oth-
erwise your voice will be heard
from the speaker during trans-
mit.
[LIGHT]
Appears when the battery
is nearly exhausted.
Blinks when battery re-
charging or replacing is
immediately necessary.