Icom IC-F121S [10/20] I receiving and transmitting

OPERATION

■ Receiving and transmitting

RECEIVING:

q Push [POWER] to turn the power ON.

w Push [CH UP] or [CH DN] to select a channel.

e When receiving a call, adjust the audio output level to a

comfortable listening level.

TRANSMITTING:

r Take the microphone off hook.

• The channel is busy when TX/RX indicator turns green.

- According to the trasceiver’s setting;

• 2-tone, 5-tone mute may be released. (The ‘audible’ condition is

selected)

• A priority channel may be selected automatically.

t Wait for the channel to become clear.

y Push the [CALL] key when initiating a call from your side.

- According to the trasceiver’s setting;

• Coded audio may be heard from the transceiver, then TX/RX

indicator turns green.

• This operation may not be necessary depending on your signal-

ing system. Ask your Dealer.

u While pushing and holding [PTT], speak into the micro-

phone at your normal voice level.

i Release [PTT] to receive.

IMPORTANT: To maximize the readability of your signal:

(1) Pause brieﬂy after pushing [PTT]

(2) Hold the microphone 2 to 5 cm from your mouth, then

speak into the microphone at a normal voice level.

D Transmitting notes

• Transmit inhibit function

The transceiver has several inhibit functions which restrict

transmission under the following conditions:

• The channel is in mute condition.

• Channel is busy.

• A matched/non-matched CTCSS code is received.

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

• Time-out timer

After continuous transmission for a pre-programmed period,

the time-out timer is activated causing the transceiver to stop

transmitting and automatically select receive.

• Penalty timer

Once the time-out timer is activated, transmission is further

inhibited for a period determined by the penalty timer.

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