Icom F9011 / F9021 Instruction Manual - Page 18

3 BASIC OPERATION ■ Receiving and transmitting NOTE: Transmitting without an antenna may damage the transceiver. See page 1 for accessory attachments. Receiving: q Rotate [VOL] to turn the power ON. w P ush [CH Up] or [CH Down], or rotate [ROTARY SELEC- TOR]* to select a channel, in sequence. *Depending on the pre-setting. e W hen receiving a call, adjust the audio output level to a comfortable listening level. Transmitting: Wait for the channel to become clear to avoid interference. q W hile pushing and holding [PTT], speak into the micro- phone at a normal voice level. w Release [PTT] to return to receive. IMPORTANT: To maximize the audio quality of your signal; 1. Pause briefly 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. 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 ('Inaudible' condition; " " does not appear.) - The channel is busy. - Un-matched (or matched) CTCSS is received. (Depending on the pre-setting.) - Un-matched (or matched) NAC is received*. (Depending on the pre-setting.) *Digital mode operation only. - The selected channel is a 'receive only' channel. • Time-out timer After continuous transmission for the pre-programmed time period, the time-out timer is activated, causing the transceiver to stop transmitting. • Penalty timer Once the time-out timer is activated, transmission is further inhibited for a period determined by the penalty timer. 13