Icom F5021 / F6021 Instruction Manual - Page 12

2 BASIC OPERATION ■ Call procedure ■ Receiving and transmitting When your system employs tone signaling (excluding CTCSS and DTCS), a call procedure may be necessary prior to voice transmission. The tone signalling employed may be a selective calling system which allows you to call specific station(s) only and prevents unwanted stations from contacting you. q S elect the desired TX code channel, 2/5-tone code ac- cording to your System Operator's instructions. • This may not be necessary depending on programming. • Refer to pages 9-10 for selection. w P ush [Call] (assigned to one of the dealer programmable keys). e A fter transmitting, the remainder of your communication can be carried out in the normal fashion. Selective calling Non-selective calling Receiving: q Push and hold [ ] for 1 sec. to turn the power ON. w P ush [CH Up] or [CH Down] to select a channel, in se- quence. e W hen receiving a call, rotate [VOL] to adjust the audio out- put level to a comfortable listening level. NOTE: Depending on the pre-setting, the transceiver automatically transmits the microphone audio for the specified time period* when a matched RX code signal is received. • HM-148G or HM-152 hand microphone is required. * Depending on the pre-setting. Ask your dealer for details. Transmitting: Wait for the channel to become clear to avoid interference. q T ake the microphone off hook. • The 'audible' condition is selected. • A priority channel may be selected automatically. w Wait for the channel to become clear. • The channel is busy when BUSY indicator appears on the LCD. e W hile pushing and holding [PTT], speak into the microphone at your normal voice level. r Release [PTT] to return to receive. 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 into the microphone at a normal  voice level.