Receiving And Transmitting - Icom iM423 Instruction Manual

4
BASIC OPERATION
D Weather channels
(U.S.A. and Australian version transceiver only)
The transceiver has 10 weather channels. These are used for
monitoring broadcasts from NOAA (National Oceanographic
and Atmospheric Administration.)
The transceiver can automatically detect a weather alert tone
on the selected weather channel or while scanning. (p. 17)
Push [CH/WX] once or twice to select a weather channel.
q
• "WX" appears when a weather channel is selected.
• "WX " appears when the Weather Alert function is in turned
ON. (p. 78)
Push [ ∫•CH] or [√•CH] to select a channel.
w
• Pushing [Y]/[Z] on the microphone also selects a channel.
When weather alert is OFF.
When weather alert is ON.
11

Receiving and transmitting

■
CAUTION: Transmitting without an antenna will damage
the transceiver.
Hold down [PWR](Dial) to turn ON the power.
q
Set the audio and squelch levels. (p. 15)
w
First, open the squelch. Then, adjust the audio output
➥
level. After that, adjust the squelch level until the noise
just disappears.
Change the channel group. (p. 10)
e
Push [ ∫](CH) or [√](CH) to select a channel. (pp. 9, 10)
r
• Pushing [Y]/[Z] on the microphone also selects a channel.
• When receiving a signal, "
• Further adjustment of the volume level may be necessary.
Push [LO/DX] to turn the receive Attenuator function ON
t
or OFF, if necessary.
• Only U.S.A. and Australian version transceivers.
• "LOCAL" appears when the receive Attenuator function is ON.
Push [HI/LO] to select the output power, if necessary.
y
• "25W" appears when high power is selected, and "1W" appears
when low power is selected.
• Choose low power for short range communications, choose high
power for longer distance communications.
• Some channels are for only low power.
Hold down [PTT] to transmit, then speak at your normal
u
voice level.
• " " appears.
• Channel 70 cannot be used for transmission other than DSC.
Release [PTT] to receive.
i
" appears and audio is heard.