31Basic OperationPerforming CommunicationPressing % repeatedly switches the communication mode as follows.[Analog (FM)] [Auto (FM)] [Digital (DN)] [Digital Wide (VW)]FM: Analog Analog communication using FM mode. Auto Automatically switches between Analog AM (AM), AnalogFM (FM), and Digital (DN).DN: Digital Digital communication using (C4FM (Quaternary FSK)modulationVW: Wide Digital High sound quality of Digital CommunicationCaution Digital communication can be performed only on the A-band.Performing Communication1 Speak into the microphone while pressing p.When speaking into the microphone, keep it about 5 cm away from your mouth.2 Release p.The transceiver returns to the Reception mode.Cautions Use the transceiver at the minimum required transmission power level.Doing so prevents the transceiver from overheating and saves battery power, increasing theoperating time. Do not continue transmitting for a prolonged period. The transceiver can overheat, resulting inmalfunction or burn. If transmission is continued for a long period, the transceiver overheats and the overheat protectionfunction is activated. As a result, the transmitting power level is automatically set to Low Power. Ifyou continue transmitting while the overheat protection function is active, the transceiver will beforcibly returned to the Reception mode.If you touch the transceiver immediately after the overheat protection function has become active,you can get burned. Wait for the temperature inside the transceiver to drop sufficiently beforeresuming transmission. Do not perform transmission without attaching the antenna. The transmitter circuit can be damaged.Tips• In the FM mode, you can transmit on the 144 MHz and 430 MHz ham radio bands.• Even while you are receiving in the AM mode, you can transmit in the FM mode by pressing p.• You can change the transmit power level by pressing F and then 1.Transmit power level may be lower when using the battery pack or the alkaline battery case.For more details, see “Changing the Transmission Power Level” on page 36.• If p is pressed when a frequency other than the amateur ham radio band is selected, an alarmtone (beep) will be emitted and “ERROR” appears on the LCD, disabling transmission.• Pressing and holding M for over 1 second, and changing the Set Mode option [8 CONFIG] willallow you to use the transceiver more conveniently.• Selecting [8 CONFIG] [2 BCLO] prohibits transmission during reception of a signal.
