ICOM VHF MARINE TRANSCEIVER 说明手册

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Transmitting without an antenna may dam-

age the transceiver.

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Push [POWER] to turn power ON.

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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.

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To change the channel group, push [CH/WX•DW•U/I/C]
while pushing [HI/LO]. (p. 6)

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Rotate the channel selector or push [

Y

]/[

Z

] on the micro-

phone to select the desired channel.

• When receiving a signal, “BUSY” appears and audio is emitted

from the speaker.

• Further adjustment of [VOL] may be necessary at this point.
• Use the optional voice scrambler function for privacy. (p. 10)

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Push [LO/DX] to turn the receive attenuator ON or OFF if
necessary.

• “LOCAL” appears when the receive attenuator is in use.

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Push [HI/LO] to select the output power if necessary.

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

spectively.

• Choose low power to conserve power, choose high power for

longer distance communications.

• Some channels are for low power only.

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

• “TX” appears.
• Channel 70 cannot be used for transmission (for GMDSS use).

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.

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Release [PTT] to receive.

IMPORTANT: To maximize the readability of your trans-
mitted signal, pause a few sec. after pushing [PTT], hold
the microphone 4 to 6 inches (10 to 15 cm) from your
mouth and speak at a normal voice level.

WATERPROOF

iM502

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3

BASIC OPERATION

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