Icom M424G Instruction Manual - Page 22
Receiving and transmitting - 21
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4 BASIC OPERATION ■ Receiving and transmitting CAUTION: Transmitting without an antenna will damage the transceiver. qqHold down [PWR] (Dial) to turn ON the power. wwSet the audio and squelch levels. (p. 11) ➥➥ First, open the squelch. Then, adjust the audio output level. After that, adjust the squelch level until the noise just disappears. eeChange the channel group. (p. 10) rrPush to select a channel. (pp. 9, 10) • Pushing [Y]/[Z] on the microphone also selects a channel. • W hen receiving a signal, " " is displayed and audio is heard. • Further adjustment of the volume level may be necessary. ttPush [LO/DX] to turn the receive Attenuator function ON or OFF, if necessary. • For only U.S.A. and Australian version transceivers. • "LOCAL" is displayed when the receive Attenuator function is ON. yyPush [HI/LO] to select the output power, if necessary. • "25W" is displayed when high power is selected, and "1W" is displayed when low power is selected. • Choose low power for short range communications, choose high power for longer distance communications. • Some channels are for only low power. uuHold down [PTT] to transmit, then speak at your normal voice level. • " " is displayed. • Channel 70 cannot be used for transmission other than DSC. 12 iiRelease [PTT] to receive. Simplex channels, 3, 21, 23, 61, 64, 81, 82, and 83 CANNOT be lawfully used by the general public in U.S.A. waters. IMPORTANT: To maximize the readability of your transmitted signal, pause a few seconds after pushing [PTT], hold the microphone 5 to 10 cm (2 to 4 inches) from your mouth and speak at your normal voice level. ✓✓ NOTE for the TOT (Time-out Timer) function The TOT function inhibits continuous transmission beyond a preset time period after the transmission starts. 10 seconds before transmission is cutoff, a beep sounds to indicate the transmission will be shut down and "TOT" is displayed in the channel name field. Transmission is not possible for 10 seconds after this shut down. r u i Microphone t y wq r y