3 CONVENTIONAL OPERATION

Receiving and transmitting

NOTE: Transmitting without an antenna may damage the trans- ceiver. See p. 2 for antenna attachment.

Receiving:

qRotate [VOL] to turn power ON.

wToggle [CHANNEL SWITCH] (IC-F15S/F25S), rotate [CHAN- NEL SELECTOR] (IC-F15/F25) or push one of [MR-CH 1] to [MR-CH 4] key to select a channel.

For IC-F15S/F25S:

The memory channels 3 and 4 are available when [MR-CH 3] and [MR-CH 4] keys are assigned.

eWhen 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.

qWhile 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 on p. 13 may be necessary.

wRelease [PTT] to return to receive.

IMPORTANT!: To maximize the readability of your signal;

1.Pause briefly after pushing [PTT].

2.Hold the microphone 5 to 10 cm from your mouth, then speak into the microphone at a normal voice level.

CONVENTIONAL OPERATION 3

DTransmitting notes

• Transmit inhibit function

3

The transceiver has several inhibit functions which restrict trans- mission under the following conditions:

-The channel is in mute condition.

-Channel is busy.

-Un-matched (or matched) CTCSS is received.

-The selected channel is a ‘receive only’ channel.

Time-out timer

After continuous transmission for the pre-programmed time period, the time-out timer activates, and causes the transceiver to stop transmitting.

Penalty timer

Once the time-out timer activates, transmission is further inhibited for a period determined by the penalty timer.

DDTMF transmission

If the transceiver has [DTMF Autodial] assigned to it, the automatic DTMF transmission function is available.

Push [DTMF Autodial] to transmit the DTMF code.

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Icom iF25 S instruction manual Receiving and transmitting, Transmitting notes, Dtmf transmission