98-175666-A Appendix E: Grounding and RF protection E-7
Grounding Recommendations
below. The crimp terminals must be a marine approved type e.g. the DuraSeal series from
Raychem.
Ground cable - connection
Mount the ground cable close to and parallel to the shielded coax cable thus minimizing
ground loop problems. If possible, route the coax cable and the ground cable in metal
conduits bonded to the hull or within a mast (depending on the actual installation).
The ground cable must be connected at one of the mounting/grounding bolts on the ADU.
Use bolts and washers of stainless steel and seal the joint with protective coating to avoid
corrosion. If the ADU is to be isolated from the mounting base, shoulder bushings and
washers must be used — see figure E-7, Isolation of the ADU from the mounting base on
page E-8.
At the other end, connect the ground cable as described in To ground the BDU on page E-
2.
Figure E-6: Separate ground cable
Antenna:
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Terminal:
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