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2. OPERATION
2-6
2.4
Transmit Timeout Timer (TOT)
When the
PTT
switch on the microphone is pressed continuously, transmit time is lim-
ited to five minutes. This limits unintentional transmissions due to a stuck
PTT
switch.
About 10 seconds before automatic transmitter shutdown, a warning beep sounds
from the speaker(s). The transceiver automatically goes to the RX mode, even if the
PTT
switch is continually held down. To transmit again, the
PTT
switch must first be
released and then pressed again.
CAUTION
: The heatsink can get hot enough to cause fire or burn injury when the TX
to RX ration goes lower than 1:9.
2.5
Simplex/Duplex Channel Use
Refer to the VHF Marine Channel Chart in the Appendix for instructions on use of sim-
plex and duplex channels.
Note:
All channels are factory-programmed in accordance with FCC (USA), Industry
Canada (Canada), and International regulations. Mode of operation cannot be altered
from simplex to duplex or vice-versa.
2.6
International, Canada, and USA Mode
To change the channel Group call from International to Canada or USA:
1.
Press and hold down the
CALL/MENU
key until the [Setup Menu] appears.
2.
Rotate the
CH
knob to select [CH Function Setup] then
press the [SELECT] soft key.
3.
Rotate the
CH
knob to select [CH Group] then press
the [SELECT] soft key.
4.
Rotate the
CH
knob to select a channel Group [USA],
[INTL], or [CAN (CANADA)] then press the [ENT] soft key to store the selected
setting.
Note:
When in INTL channel group, inland waterways channel group can be se-
lected from the ATIS menu by switching ATIS to ON. See section 6.2.
5.
Press the [QUIT] soft key several times to return to radio operation.
2.7
Backlight Adjustment
Adjust the display illumination for viewing in sunlight or darkness.
1.
Press the
FUNC
key followed by the
4/DIM
key to show the [Dimmer] menu.
2.
Rotate the
CH
knob to select the desired level. When
[OFF] is selected, the backlight is turned off.
3.
Press the [ENT] soft key to store the selected level,
and return to radio operation.
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