I Receiving And Transmitting - Icom IC-M604 Instruction Manual

I 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 in advance.
➥ Rotate [VOL] to adjust the audio output level.
➥ Rotate [SQL] clockwise until the noise disappears.
e While pushing and holding [H/L], push [CH/WX] several
times to change the channel group. (p. 8)
r Rotate [SELECTOR] to select a channel.
• Pushing the keypad or [Y Y ]/[Z Z ] on the microphone also selects a
channel.
• When receiving a signal, "B B U U S S Y Y " appears and audio is emitted
from the speaker.
• Further adjustment of [VOL] may be necessary.
t Push [F], then push [6•
LO/DX
uator function ON or OFF, if necessary.
• "L L O O C C " appears when the receive Attenuator is ON.
y Push [H/L] to select the output power if necessary.
• "2 2 5 5 W W " or "1 1 W W " 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 Push and hold [PTT] to transmit, then speak into the mi-
crophone.
• "T T X X " appears.
• Channel 70 cannot be used for transmission other than DSC.
i Release [PTT] to receive.
(pgs. 6, 7, 57)
] to turn the receive Atten-
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 trans-
mitted signal, pause a few sec. after pushing [PTT], hold
the microphone 2 to 4 inches (5 to 10 cm) from your mouth
and speak at a normal voice level.
y e e
VHF MARINE iM604
U/I/C
MIC
VOL SQL
w r
✔ 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 "T T O O T T " ap-
pears on the channel comment indicator. Transmission is not
possible for 10 sec. after this transmission shut down.
BASIC OPERATION
r t u i
Microphone
9
16
DISTRESS
q r e y
3
3
9