Icom IC-M804 Instruction Manual - Page 69

8 CONNECTIONS AND INSTALLATION DDConnecting the remote control cable 1. Insert the remote control cable's connector into the main unit jack on the remote controller's back panel. 2. Rotate the connector clockwise until it is completely tightened. CAUTION: BE SURE that the control cable's connector is completely screwed to the remote controller's back panel. Otherwise, the remote controller may lose its waterproof protection. ■■Ground connection The transceiver and antenna tuner must have a proper RF ground connection. Otherwise, the efficiency of the transceiver and antenna tuner may be reduced. Also, electrolysis, electrical shocks, and interference with other equipment may occur. For the best results, use a 50 or 75 mm wide copper strap, and connect 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. CAUTION: •• DO NOT connect the transceiver to a "positive- grounded vessel." Otherwise, the transceiver will not function. •• Any external units, such as a PC, must be properly grounded. We suggest using a wide copper strap. Ground system example Remote controller cable's connector Best ground points and materials •• External ground plate 8 •• 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 Wide Copper strap Copper pipe Metal object GND Copper screen 64