Site considerations
98-175666-A Chapter 2: Installation 2-3
2.2.1 General considerations
For optimum system performance, follow the guidelines on where to install or mount the
different units of the SAILOR XTR Ka system. You do not have to align the ADU with the
bow-to-stern line of the ship. When configuring the SAILOR XTR Ka system, the azimuth
calibration provides the correct azimuth of the ADU.
Mount the ADU on stiffened structures with a minimum of exposure to vibrations.
Safe access to the ADU: Radiation hazard
The radiation and safety distances are:
Painting the radome
Customers may wish to paint the radome in order to match the vessel’s color. Any paint
used must be non-metallic based. Painting the radome may impact RF performance and
may lead to over-heating, causing the antenna to go in safe mode (switch off).
Cobham SATCOM recommends that the radome should NOT be painted. Painting the
radome will not void the general warranty regarding material and workmanship etc. It is
only the performance that cannot be guaranteed.
Modifying the radome or using another radome
The SAILOR XTR Ka antenna comes with a type-approved radome fitted from the factory.
This radome is specifically designed for a minimal loss of RF performance for this specific
antenna. Insertion loss reduces the available signal and decreases the effective radiated
power and G/T (the ability to receive a weak signal). Modifying the radome or using another
radome may increase the antenna side lobes, resulting in interference with other
communication systems and thereby void satellite operator approvals. Other electrical
effects on antenna performance of another radome, or of modifying the radome, include a
change in the antenna beam width and shifting of the antenna bore sight.
Cobham SATCOM recommends NOT to modify the radome or change it to another type.
Exchanging or modifying the radome will not void the general warranty for material and
workmanship etc. but the performance cannot be guaranteed, and the satellite operator
approvals will not be valid.
Antenna model
Maximum EIRP
level
Safety
distance
407509C-00540 SAILOR 1000 XTR Ka 4.5W ADU 53.5 dBW 30 m
407509D-00540 SAILOR 1000 XTR Ka 9.0 ADU 56.6 dBW 55 m
407506A-00540 SAILOR 600 XTR Ka 4.5W ADU 50.1 dBW 30 m
407506D-00540 SAILOR 600 XTR Ka 9.0W ADU 53.1 dBW 44 m
Table 2-1: Radiation and safety distance
The safety distance is based on a radiation level of 10 W/m²
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