2 BASIC OPERATION2-6TransmittingWait until the channel is clear to avoid interference.Take the microphone off-hook.q• While scanning, the scan stops.Wait for the channel to become clear.w• The channel is busy when the LED indicator lights green.While holding down [PTT], speak at a normal voiceelevel.Release [PTT] to receive.rNOTE:To maximize the readability of your signal:1. After pushing [PTT], pause briefly before you startspeaking.2. Hold the microphone 5 to 10 cm (2 to 4 inches)from your mouth, then speak at your normal voicelevel.Transmitting notesD• Transmit inhibit functionThe transceiver has several inhibit functions which re-strict transmission under the following conditions:- The channel is busy.- An unmatched CTCSS tone or DTCS code is re-ceived, depending on the presetting.- An unmatched or matched RAN code is received,depending on the presetting.- The selected channel is a ‘receive only’ channel.• Time-out timer (TOT)After continuous transmission for a preset time pe-riod, the time-out timer causes the transceiver to stoptransmitting.• TOT Rekey timerOnce transmission is cut OFF, it is further inhibited fora period determined by the TOT Rekey timer.• MDC 1200 system operationThe MDC 1200 signaling system enhances your trans-ceiver’s capabilities. It allows PTT ID signaling.When you push or release [PTT], the transceiversends your unit ID, if preset.ID 0001When receiving a PTTIDfrom unit ID ‘0001.’