Icom IC-M412 Instruction Manual

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Contents

73BASIC OPERATION3n Receiving and transmittingCAUTION: Transmitting without an antenna may dam-age the transceiver.q Rotate [VOL] to turn ON the power.w Set the audio and squelch levels.➥ Rotate [SQL] fully counterclockwise.➥ Rotate [VOL] to adjust the audio output level.➥ Rotate [SQL] clockwise until the noise just disappears.While in the DSC operation, please make sure you cor-rectly set the squelch.e Push [U/I/C] (both [Y] and [Z]) to change the channelgroup. (p. 6)r Push [Y] or [Z] to select a desired channel. (pp. 5, 6)• When receiving a signal, “ ” appears and audio is heardfrom the speaker.• Further adjustment of [VOL] may be necessary.t Push [HI/LO] on the microphone to select the outputpower, if necessary.• “LOW” appears when low power is selected.• Choose low power for short range communications, choose highpower for longer distance communications.• Some channels are for low power only.y Hold down [PTT] to transmit, then speak into the micro-phone (M).• “ ” appears.• Channel 70 cannot be used for transmission other than DSC.u Release [PTT] to receive.IMPORTANT: To maximize the readability of your trans-mitted signal, pause a few seconds after holding down[PTT], hold the microphone 5 to 10 cm from your mouthand speak into the microphone (M) at a normal voicelevel.uwreMq yr tM: Microphone4 NOTE for the TOT (Time-out Timer) functionThe TOT function inhibits continuous transmission over a pre-programmed time period after the transmission starts.A beep sounds and “TOT” appears on the channel commentdisplay at the 10 seconds before the transmission will be shutdown by the TOT function. Transmission is disabled for 10seconds after this transmission shut down.