I Microphone Lock Function; I Receiving And Transmitting - Icom IC-M402 Instruction Manual

ï ï Weather channels
There are 10 weather channels. Used for monitoring weather
channels from the NOAA (National Oceanographic and At-
mospheric Administration) broadcasts.
The transceiver can detect a weather alert tone on the se-
lected weather channel while receiving the channel, during
standby on a regular channel or while scanning. (p. 20)
q Push [CH/WX] once or twice
to select a weather channel.
• "WX" appears when a weather
channel is selected. "WX ALT"
appears when the weather alert
function is in use. (p. 20)
w Push [Y]/[Z] to select a chan-
nel.
• Channels are memorized sepa-
rately for each channel group.

I Microphone lock function

The microphone lock function electrically locks the [Y]/[Z] and
[16/9] switches on the supplied microphone. This prevents ac-
cidental channel changes and accidental function access.
➥ While pushing [16/9] on the supplied microphone, turn
power ON to toggle the lock function ON and OFF.
Push
once
When weather alert is OFF.
or
twice
When weather alert is ON.

I Receiving and transmitting

CAUTION:
Transmitting without an antenna may dam-
age the transceiver.
q Turn [VOL] right 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 Push [Y]/[Z] to select the desired channel. (p. 5)
• When receiving a signal, "BUSY" appears and audio is emitted
from the speaker.
r Push [H/L] to select the output power if necessary.
• "LOW" appears when low power is selected.
• Choose high power for stronger signal propagation.
• Some channels are for low power only.
t Push and hold [PTT] to transmit, then speak into the mi-
crophone.
• "TX" appears.
• Channel 70 cannot be used for transmission (for DSC 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.
y Release [PTT] to receive.
IMPORTANT: To maximize the readability of your trans-
mitted signal, pause a few sec. after pushing [PTT], hold
the microphone 1 to 2 inches (2.5 to 5 cm) from your
mouth and speak at a normal voice level.
3
BASIC OPERATION
6