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Receiving and transmitting
CAUTION:
Transmitting without an antenna may dam-
age the transceiver.
q
Push [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 [HI/LO], push [DIAL] to change
the channel group. (p. 6)
• The European version has International channels only.
r
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)
t
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.
y
Push and hold [PTT] to transmit, then speak into the mi-
crophone.
• “TX” appears.
• Channel 70 cannot be used for transmission (for GMDSS use).
u
Release [PTT] to receive.
IMPORTANT:
To maximize the readability of your trans-
mitted signal, pause a few sec. after pushing [PTT], hold
the microphone 2 to 5 cm from your mouth and speak at a
normal voice level.
16
CALL
DUAL
SCAN
WATER RESISTANT
TAG
DIAL
DIMMER
HI/LO
POWER
VOL
iM503
VHF MARINE
SQL
q
w
e
r
r
t
t
y u
3
BASIC OPERATION
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