Site considerations
98-175666-C
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 GX-R2 system. You do not have to align the ADU
with the bow-to-stern line of the ship. When configuring the SAILOR XTR GX-R2 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 vesselʼs 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 GX-R2 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 GX-R2 4.5W ADU 53.5 dBW
30 m
407509D-00540 SAILOR 1000 XTR GX-R2 9.0 ADU
56.6 dBW
55 m
407506A-00540 SAILOR 600 XTR GX-R2 4.5W ADU
50.1 dBW
30 m
407506D-00540 SAILOR 600 XTR GX-R2 9.0W ADU
53.1 dBW
44 m
Table 2-1: Radiation and safety distance
Note
The safety distance is based on a radiation level of 10 W/m².
