8
3
BASIC OPERATION
■
Receiving and transmitting
CAUTION: Transmitting without an antenna will damage
the transceiver.
q
Push
[POWER] to turn ON the power.
w
Set the audio and squelch levels.
➥
Rotate
[SQL] fully counterclockwise first.
➥
Rotate
[VOL] to adjust the audio output level.
➥
Rotate
[SQL] clockwise until the noise disappears.
e
While holding down
[H/L], push [CH/WX•DUAL• U/I/C]
one or more times to change the channel group. (p. 7)
r
Rotate
[DIAL] to select a channel. (pp. 6, 7)
• Pushing the keypad keys, or
[
Y
]/[
Z
] on the microphone, also
selects a channel.
• When receiving a signal, “
BUSY
” appears and audio is emitted
from the speaker.
• Further adjustment of
[VOL] may be necessary.
t
Push
[LO/DX•IC•SCRM] to turn the receive Attenuator
function ON or OFF, if necessary.
• “
LOC
” appears when the receive Attenuator function is ON.
y
Push
[H/L] 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, choose high
power for longer distance communications.
• Some channels are for low power only.
u
Hold down
[PTT] to transmit, then speak into the micro-
phone at your normal voice level.
• “
TX
” appears.
• Channel 70 cannot be used for transmission other than DSC.
i
Release
[PTT] to receive.
Simplex channels, 3, 21, 23, 61, 64, 81, 82 and 83
CANNOT
be lawfully used by the general public in U.S.A. waters.
IMPORTANT: To maximize the readability of your transmit-
ted signal, pause a few seconds after pushing
[PTT], hold
the microphone 2 to 4 inches (5 to 10 cm) from your mouth
and speak at a normal voice level.
t
Microphone
q
y
r
e
w
w
i
u
r
e y
✔
NOTE for TOT (Time-out Timer) function
The TOT function inhibits continuous transmission over a pre-
set time period after the transmission starts.
10 seconds before the TOT function activates, a beep sounds
to indicate the transmission will be shut down and “
TOT
” ap-
pears on the channel comment indicator. Transmission is not
possible for 10 seconds after this transmission shut down.
Summary of Contents for IC-M504A
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