Icom ic-m423g - Receiving and Transmitting Signals

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BASIC OPERATION
■ 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. 12) e
Push [ r ∫]/[√] to select a channel. (pp. 11, 12)
 •Pushing[Y]/[Z] on the microphone selects only Favorite chan-
nels.
 •When receiving a signal, “ ” is displayed and audio is
heard.
 •Furtheradjustmentofthevolumelevelmaybenecessary.
Push [LO/DX] to turn the receive Attenuator function ON t
or OFF, if necessary.
 •ForonlyU.S.A.andAustralianversiontransceivers.
 •“LOCAL” is displayed when the receive Attenuator function is
ON.
Push [HI/LO] to select the output power, if necessary. y
 •Pushing[H/L]or[HI/LO]onthemicrophonealsoselecttheout-
put power.
 •“25W” is displayed when high power is selected, and “1W” is
displayed 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.
 •“ ” is displayed.
 •Channel70cannotbeusedfortransmissionotherthanDSC.
Release [PTT] to receive. i
Information ✓
The Noise Cancel function reduces random noise components
in the transmit and/or receive signal. See page
78 for details.
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 transmit-
ted signal, pause a few seconds after pushing [PTT], hold
the microphone 5 to 10 cm (2 to 4 inches) from your mouth
and speak at a normal voice level.
NOTE for the TOT (Time-out Timer) function ✓
The TOT function inhibits continuous transmission beyond a
preset time period after the transmission starts.
10 seconds before transmission is cutoff, a beep sounds to
indicate the transmission will be shut down and “TOT” is dis-
played in the channel name field. Transmission is not possible
for 10 seconds after this shut down.