Ground Connection; Power Source - Icom IC-M803 Instruction Manual

■ Ground connection

The transceiver and antenna tuner must have an
adequate RF ground connection. Otherwise, the
efficiency of the transceiver and antenna tuner may
be reduced. Also, electrolysis, electrical shocks, and
interference from other equipment may occur.
For the best results, use a 50 or 75 mm (2 or 3 inches)
wide copper strap, and make the connection as short
as possible. Ground the transceiver and antenna tuner
to one ground point, otherwise, the voltage difference
(at the RF level) between the 2 ground points may
cause electrolysis.
R WARNING! When grounding to a metal hull, use
Zinc anodes to protect the hull from electrolysis. Ask
your dealer or installer for RF grounding details.
CAUTION:
• NEVER connect the transceiver to a "positive-
grounded vessel," otherwise the transceiver will
not function.
• Any external units, such as PC, printer, and so on,
must be properly grounded. We suggest using a
wide copper strap.
Ground system Example

■ Power source

The transceiver requires a regulated DC power of
13.6 V and at least 30 A.
• Direct connection to a 12 V battery in your vessel
through the supplied DC power cable.
CAUTION: The supplied DC power cable MUST
be used to provide power to the transceiver. AVOID
exceeding a 3 m (10 ft.) length of the DC power
cable. When it is necessary to make a run of over
3 m, use a #6 or similar gauge wire with line fuses,
instead of the supplied DC power cable. The cable
should be a maximum of 6 m (20 ft.).
Copper pipe Metal object
CONNECTIONS AND INSTALLATION
Best ground points
• External ground plate
• Copper screen
• Copper foil
Acceptable ground points
• Stainless steel stanchion
• Through mast
• Through hull
• Metal water tank
Undesirable ground points
• Engine block
• Vessel's DC battery ground
Unusable ground points
(these connections may cause an explosion or
electrical shock)
• Gas or electrical pipe
• Fuel tank or oil catch pan
Copper screen
DC power cable connection
NOTE: Use terminals for the cable connection.
Black
_
Supplied
12V battery
DC power cable
Red Crimp
+
Solder
9
9
71