Icom IC-450 Marine Radio User Manual


 
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3
CONVENTIONALOPERATION
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3
CONVENTIONALOPERATION
Call procedure
When your system employs tone signalling (excluding CTCSS and
DTCS), the call procedure may be necessary prior to voice trans-
mission. The tone signalling employed may be a selective calling
system which allows you to call specic station(s) only and prevent
unwanted stations from contacting you.
q Select the desired TX code channel or 2/5-tone code according
to your System Operators instructions.
This may not be necessary depending on programming.
Refer to pgs. 15, 16 for selection.
w Push the call switch (assigned to one of the dealer programma-
ble switches: [P0], [P1], [P2], [P3], [Red], [ ] and []).
e After transmitting a 2/5-tone code, the remainder of your com-
munication can be carried out in the normal fashion.
Selective calling
Non-selective calling
Receiving and transmitting
NOTE: Transmitting without an antenna may damage the trans-
ceiver. See p. 1 for antenna attachment.
Receiving:
q Rotate [VOL] to turn power ON.
w Push [ ] or [ ] to select a channel.
e When receiving a call, adjust the audio output level to a comfort-
able listening level.
Transmitting:
Wait for the channel to become clear to avoid interference.
q While pushing and holding [PTT], speak into the microphone at a
normal voice level.
When a tone signalling system is used, the call procedure de-
scribed at left may be necessary.
w Release [PTT] to return to receive.
IMPORTANT: To maximize the readability of your signal;
1. Pause briey after pushing [PTT].
2. Hold the microphone 5 to 10 cm (2 to 4 inches) from your
mouth, then speak into the microphone at a normal voice
level.
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