Icom IC-M504 instruction manual Receiving and transmitting, Basic Operation

3 BASIC OPERATION

■Receiving and transmitting

CAUTION: Transmitting without an antenna may dam- age the transceiver.

qPush [POWER] to turn power ON. w Set the audio and squelch levels.

➥Rotate [SQL] fully counterclockwise in advance.

➥Rotate [VOL] to adjust the audio output level.

➥Rotate [SQL] clockwise until the noise disappears.

e While pushing and holding [H/L], push [CH/WX•DUAL• U/I/C] to change the channel group. (p. 7)

r Rotate [DIAL] to select the desired channel. (pgs. 6, 7)

• When receiving a signal, “BUSY” appears and audio is emitted from the speaker.

• Further adjustment of [VOL] may be necessary.

t Push [LO/DX•IC•SCRM] to turn the receive Attenuator function ON or OFF, if necessary.

• “LOC” appears when the receive Attenuator function is in use. y Push [H/L] to select the output power if necessary.

• “25W” or “1W” appears when high or low power is selected, re- spectively.

• Choose low power for short range communications, choose high power for longer distance communications.

• Some channels are for low power only.

u Push and hold [PTT] to transmit, then speak into the mi- crophone.

• “TX” appears.

• Channel 70 cannot be used for transmission other than DSC. i Release [PTT] to receive.

Simplex channels, 3, 21, 23, 61, 64, 81, 82 and 83 CAN- NOT be lawfully used by the general public in U.S.A. wa- ters.

IMPORTANT: To maximize the readability of your trans- mitted signal, pause a few sec. after pushing [PTT], hold the microphone 2 to 4 inches (5 to 10 cm) from your mouth and speak into the microphone at a normal voice level.

q y ui Microphone

w w e r t r e y

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