Icom IC-F4230D Instruction Manual - Page 15

BASIC OPERATION 3 ■■Receiving and transmitting CAUTION: Transmitting without an antenna may damage DDTransmitting notes the transceiver. See page 1 for accessory attachments. • Transmit inhibit function 3 Receiving: qqRotate [VOL] to turn ON the power. wwPush [CH Up] or [CH Down] to sequentially select the con- ventional system channel. eeWhen receiving a call, adjust the audio output level to a comfortable listening level. The transceiver has several inhibit functions which restrict transmission under the following conditions: - The channel is busy. However, depending on the preprogrammed settings, you can transmit when the call includes an unmatching (or matching) CTCSS (DTCS), RAN code*, or Individual or Talkgroup ID*. * Digital operation only Transmitting: - The selected channel is a 'receive only' channel. Wait for the channel to become clear to avoid interference. qqWhile pushing and holding [PTT], speak into the micro- phone at a normal voice level. wwRelease [PTT] to return to receive. • Time-out timer If continuous transmission exceeds the preprogrammed time-out timer limit, the transmission is cut off. IMPORTANT: To maximize the readability 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 at a normal voice level. • Penalty timer After the transmission is cut off by the time-out timer, trans- mission is further inhibited for the preprogrammed penalty timer period. 10