Icom IC-M604A Instruction Manual - Page 15

■ Receiving and transmitting - vhf marine

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BASIC OPERATION 3 ■ Receiving and transmitting CAUTION: Transmitting without an antenna will damage the transceiver. q Push [POWER] to turn power ON. 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] several times to change the channel group. (p. 8) r Rotate [SELECTOR] to select a channel. (pp. 6, 7, 61) • Pushing the keypad keys, or [Y]/[Z] on the microphone, also selects a channel. • When receiving a signal, "$75;" appears and audio is heard from the speaker. • You may need to further adjust [VOL]. t Push [O], then push [6• LO/DX ] to turn the receive Atten- uator function ON or OFF, if necessary. • ".1%" appears when the receive Attenuator is ON. y Push [H/L] to select the output power, if necessary. • "9" or "9" appears when high or low power is selected. • Choose low power for short range communications, choose high power for longer distance communications. • Some channels are restricted to only low power. u Hold down [PTT] to transmit, then speak into the microphone at your normal voice level. • "6:" 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 CAN- NOT be lawfully used by the general public in U.S.A. waters. 3 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. ye r t u i Microphone VHF MARINE iM604 U/I/C MIC VOL SQL 9 16 DISTRESS w rq r ey ✔ NOTE for TOT (Time-out Timer) function The TOT function inhibits continuous transmission over a preset 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 "616" appears on the channel comment indicator. Transmission is not possible for 10 seconds after this transmission shut down. 9

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9
3
BASIC OPERATION
3
■
Receiving and transmitting
CAUTION:
Transmitting without an antenna will damage
the transceiver.
q
Push
[POWER]
to turn power ON.
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]
several times to
change the channel group. (p. 8)
r
Rotate
[SELECTOR]
to select a channel.
(pp. 6, 7, 61)
•
Pushing the keypad keys, or
[
Y
]
/
[
Z
]
on the microphone, also
selects a channel.
•
When receiving a signal, “
$75;
” appears and audio is heard
from the speaker.
•
You may need to further adjust
[VOL]
.
t
Push
[
O
]
, then push
[6•
LO/DX
]
to turn the receive Atten-
uator function ON or OFF, if necessary.
•
“
.1%
” appears when the receive Attenuator is ON.
y
Push
[H/L]
to select the output power, if necessary.
•
“
±²9
” or “
³9
” appears when high or low power is selected.
•
Choose low power for short range communications, choose
high power for longer distance communications.
• Some channels are restricted to only low power.
u
Hold down
[PTT]
to transmit, then speak into the micro-
phone at your normal voice level.
• “
6:
” 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
CAN-
NOT
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 5 to 10 cm (2 to 4 inches) from your
mouth and speak at a normal voice level.
VOL
iM604
VHF MARINE
MIC
U/I/C
9
16
SQL
DISTRESS
Microphone
w
e
tui
q
r
r
y
e
y
r
✔
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 “
616
” ap-
pears on the channel comment indicator. Transmission is not
possible for 10 seconds after this transmission shut down.