Icom IC-M604A [15/68] Receiving and transmitting

Icom IC-M604A [15/68] Receiving and transmitting
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 fi rst.
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 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
eetui
qrrye
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.

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