4. GROUNDING AND RF PROTECTION
4-13
4.8.2
Grounding the Antenna Unit
If the mounting base of the antenna is electrically connected to any other ground po-
tential than the Communication Unit (e.g. Lightning Ground), the antenna must be iso-
lated at its mounting bolts by means of shoulder bushings and washers – see
section 4.9.3.
However, a ground connection must be established via one of the mounting bolts us-
ing a separate ground cable. The ground cable must be routed parallel and in close
proximity to the shielded coax cable hence connecting the antenna to the Communi-
cation Unit Grounding kit. A tinned heavy gauge wire (min. 6 mm
2
) can be used for
this purpose – see the figure below.
Alternative grounding for timber hulls
Communication Unit
Grounding Kit
-
+
Heavy Gauge
Wire
RF Ground
Communication Unit
Grounding Kit
Communication
Unit
Antenna
Unit
Antenna
Unit
Summary of Contents for FELCOM251
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Page 53: ...3 CONNECTING POWER 3 6 This page is intentionally left blank...
Page 85: ...6 STARTING UP THE SYSTEM 6 6 This page is intentionally left blank...
Page 89: ...7 TROUBLESHOOTING 7 4 This page is intentionally left blank...
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