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8
3
BASIC OPERATION
New2001
■
Receiving and transmitting
CAUTION:
Transmitting without an antenna may damage
the transceiver.
q
Rotate
[VOL]
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.
While in the DSC operation, please make sure you set
the squelch correctly.
e
To change the channel group, push both
[
▲
]
and
[
▼
]
on
the transceiver. (p. 7)
r
Push
[
▲
]
or
[
▼
]
to select the desired channel. (pgs. 6, 7)
• When receiving a signal, “
BUSY
” appears and audio is emitted
from the speaker.
• Further adjustment of
[VOL]
may be necessary at this point.
t
Push
[HI/LO]
on the microphone to select the output
power if necessary.
• “
25W
” or “
1W
” appears when high or low power is selected, re-
spectively.
• Choose low power for short range communications, and 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 (
M
).
• “
TX
” appears.
• Channel 70 cannot be used for transmission other than DSC.
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 (
M
) 5 to 10 cm from your mouth and speak
at a normal voice level.
✔
NOTE for TOT (Time-out Timer) function
The TOT function inhibits continuous transmission over a pre-
set time period after the transmission starts.
A beep sounds 10 sec. before the TOT function activates, to
indicate the transmission will be shut down and “
TOT
” ap-
pears on the channel comment indicator. Transmission is not
possible for 10 sec. after this transmission shut down.
u
w
r
e
M
q
y
r
t
M
: Microphone
!IC-M421-3.qxd 06.5.26 1:43 PM Page 8 (1,1)
Summary of Contents for IC-M421
Page 1: ......
Page 42: ...re ush call or r Push ENT to transmit the polling request call to the se lected station ...
Page 61: ...55 12 TEMPLATE 11 12 Unit mm 164 78 149 61 6 ...
Page 62: ......
Page 63: ...57 28 3 14 2 111 2 60 6 Unit mm ...
Page 64: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan ...