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73
SAILOR FleetBroadBand
Training Manual
3
Why grounding?
The reason for grounding the ADU is due to these three (3)
points:
• Safety:
Lightning protection of personnel and equipment.
First of all grounding of the ADU is required for safety reasons.
In the event of a lightning strike at the ADU, a proper grounding
of the system will provide a low resistance path to divert the
strike discharge to seawater.
• Protection:
ESD (ElectroStatic Discharge) protection of
equipment.
Secondly the ESD protection circuits in the system is relying
on a proper grounding in order to work properly. Otherwise
sensitive circuits within the system might be damaged due to
ESD when handling the equipment.
• Performance:
Interference free communication between BDU
and ADU.
Finally a proper grounding of the system will enhance RF
immunity thus ensuring interference free modem communication
between BDU and ADU. This modem communication is
essential for the performance of the SAILOR FleetBroadband
system.
3.4.2 Important mounting notes
Line of sight
Place the antenna with free line of sight towards the satellite in all
directions to ensure proper reception of the satellite signal. Do not
place the antenna close to large objects that may block the signal.
Water intrusion
After having connected the antenna cable to the antenna - ensure
that the connector assembly is properly protected against seawater
and corrosion. As a minimum, use self-amalgamating rubber.
If possible, install the radome such that direct spray of sea water
is avoided.
Make sure that the gasket between top radome and bottom radome
is properly in position and is intact.
It is recommended
not
to use pneumatic tools for cleaning the
radome, especially at a short distance and directly at the split
between top and bottom and directly into the drainage holes.
Make sure the requirements to drainage are met.
NOTE!
Do not close the drainage
holes of the antenna with
silicone, glue, foam or other
materials, as water from the
inside of the antenna have to
be able to be drained out.
Содержание Sailor 250 FleetBroadband
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Страница 9: ...Inmarsat Network ...
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Страница 34: ...24 1 Chapter 1 Inmarsat Network Figure 1 34 Return direction connection bearers ...
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Страница 37: ...Product Presentation ...
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Страница 71: ...Installation ...
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Страница 174: ...164 Chapter 5 Troubleshooting 5 Example Terminal LED steady green Antenna LED steady green Figure 5 77 Figure 5 78 ...
Страница 178: ...168 Chapter 5 Troubleshooting 5 Example GPS module defective Figure 5 86 Figure 5 87 Figure 5 88 Figure 5 89 ...
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Страница 270: ...TT 100 MSO 030207 www cobham com satcom ...