Panel Description; Main Unit Front Panel - Icom IC-M804 Instruction Manual

■ Main unit front panel

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1 GROUND TERMINAL [GND] (p. 64)
Connects to the vessel's ground.
2 DSC ANTENNA CONNECTOR (p. 62)
Connects to a 50 Ω HF marine band antenna
through a 50 Ω PL-259 coax for a DSC receiver.
This antenna is used for receiving Distress calls.
NOTE: To receive a Distress call, BE SURE
to connect an HF marine band antenna to this
antenna connector. Otherwise, you cannot receive
any Distress calls.
3 SPEAKER JACK [SP] (p. 62)
Connects to the optional SP-24E or an external
speaker.
NOTE: When an external speaker is connected,
the internal speaker is automatically muted.
4 GPS JACK [GPS-DATA] (pp. 63, 71)
Connects to a GPS receiver to input position and
UTC data for DSC operations. (NMEA 0183 ver. 4.10
format)
L An NMEA ver. 4.10 (sentence formatter: GGA,
GLL, GNS, RMC, VTG) compatible GPS receiver
is required. Ask your dealer about suitable GPS
receivers.
5 CONTROLLER CONNECTOR [CONTROLLER]
(p. 62)
Connects to the supplied remote controller.
6 MODEM CONNECTOR [AF/MOD] (pp. 63, 71)
Connects to an external terminal unit for SSB mode
operation through an RS-232C cable (D-sub 9-pin).
NOTE: When connecting an external unit, detach
the cover.
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PANEL DESCRIPTION

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7 REMOTE CONNECTOR [REMOTE] (pp. 63, 72)
Connect a PC through a USB to RS-422A
(D-sub 9 pin) cable for remote control.
NOTE: When connecting an PC, detach the cover.
8 NMEA 2000 CONNECTOR [NMEA 2000]
(pp. 63, 72)
Connects to the NMEA 2000 network.
NOTE: When connecting to the NMEA 2000
network, detach the cap.
9 GPS ANTENNA CONNECTOR [GPS-ANT] (p. 63)
Connects to the supplied GPS antenna.
NOTE: Install the GPS antenna where it has a
clear view to receive signals from satellites.
10 ANTENNA CONNECTOR (p. 62)
Connects to a dipole antenna or an automatic
antenna tuner through a 50 Ω PL-259 coax to transmit
and receive any calls other than Distress calls.
R WARNING! NEVER directly connect the
antenna to this connector.
11 TUNER CONTROL SOCKET [TUNER]
(pp. 62, 71)
Connects to the control cable of the supplied
AT-141 hf automatic antenna tuner. A female
connector kit is supplied to connect the AT-141.
12 POWER SWITCH [DC ISOLATE]
Turns the transceiver's main power ON or OFF.
13 DC POWER SOCKET [DC INPUT] (p. 65)
Connects to a 12 or 24 V DC power source through
the supplied DC power cables. The red terminal is
positive (+), and the black terminal is negative (–).
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