User's Manual

AR24027 Operator’s Manual (rev E)
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additional advantage of effective system grounding is the minimizing of electrical noise and
interference, which can significantly degrade system performance.
Grounding involves providing a good, very low resistance connection from the antenna and radio to
earth ground to provide a better path for lightning and electrical noise than that through the
equipment. The following points should be taken into account in setting up system grounding:
• The antenna should be mounted on a mast or tower that is well grounded to earth.
• All antenna lead connectors should be correctly installed to provide a good, solid connection to
the cable shield.
• Threaded couplings mating antenna lead connectors should be clean and tight; bayonet type
connectors should not be used.
• Weatherproof connectors must be used for outdoor connections to prevent corrosion, which will
interfere with grounding.
• All power and antenna grounds should be made common at a single point such as an equipment
rack, cabinet enclosure chassis, or antenna tower. This single-point ground should have a solid
ground connection to earth.
• If the unit is installed indoors, a surge arrestor or lightning protector should be installed at the
point where the antenna cable enters the building or cabinet. The lightning protector should be
properly grounded at the single-point chassis ground. Carefully follow the installation
instructions provided by the manufacturer of the protection device. Appropriate lightning
protectors are available from AFAR Communications Inc.