Icom IC-M803 Instruction Manual - Page 79

Ground connection, Power source, Ground system Example

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9 CONNECTIONS AND INSTALLATION ■■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. RRWARNING! When grounding to a metal hull, use Zinc anodes to protect the hull from electrolysis. Ask your dealer or installer for RF grounding details. 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 CAUTION: Unusable ground points •• NEVER connect the transceiver to a "positive- (these connections may cause an explosion or grounded vessel," otherwise the transceiver will electrical shock) 9 not function. •• Gas or electrical pipe •• Any external units, such as PC, printer, and so on, •• Fuel tank or oil catch pan must be properly grounded. We suggest using a wide copper strap. Ground system Example Copper pipe Metal object Copper screen ■■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.). DC power cable connection NOTE: Use terminals for the cable connection. _ Black + Red Crimp 12V battery Supplied DC power cable Solder 71

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71
CONNECTIONS AND INSTALLATION
9
9
■
Ground connection
■
Power source
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
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 pipe
Metal object
Copper screen
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.).
DC power cable connection
NOTE:
Use terminals for the cable connection.
+
_
Supplied
DC power cable
Crimp
Solder
12V battery
Black
Red