COBHAM Sailor 900 VSAT, Technical Manual

Page: 62 / 356

Installation of the ADU
3-22 Chapter 3: Installation 98-133966-G1
3.3.3 Grounding the ADU
The ADU must be grounded using the mounting bolts. If the ADU
cannot or should not be electrically connected directly to the mounting
surface, you can use a separate grounding cable to make the
connection between the ADU and the common ground to which the
ACU is also connected. If grounding to the ship ground is impossible,
for example if you have a fibre glass hull, see
Alternative grounding for
fibre glass hulls
on page F-8.
To obtain a good ground connection, the metal underneath the head of
at least one bolt must be clean of insulating protective coating and a
serrated washer should be used. After tightening the bolts we
recommend that you seal the area suitably in order to avoid corrosion
of the grounding point. Use stainless steel bolts and washers.
Optimum grounding is achieved by connecting the ground wire to the
bolt marked in the figure below.
For further information on grounding and RF protection see Grounding
and RF protection on page F-1.
Figure 3-21: ADU, bolt for optimum grounding
Bolt used
for best grounding
SAILOR900TM.book Page 22 Monday, September 16, 2013 11:01 AM