Ground Connection; Software Maintenance - Icom GM800 Instruction Manual

■ Ground connection

The transceiver and antenna tuner must have an
adequate RF ground connection. Otherwise, the
effi ciency 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 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
ship," 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
GND

■ Software maintenance

The Icom customer support center provides the
fi rmware fi le for transceiver maintenance. You can
update the transceiver's fi rmware through a PC.
To a USB port
Copper pipe Metal object
OPC-478UC
PC
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
• Ship'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
Wide Copper strap
GND
Copper screen
To the [MAINTENANCE]
connector
Remote controller
To the [MAIN UNIT]
connector
Remote control cable
9
9
To the main unit
80