Chapter 2: Installing the system
TT-98-129218-A
Installing the antenna
12
Installing the antenna
Antenna grounding
You may ground the antenna using the mounting bolts.
If the antenna 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 antenna and the
common ground to which the terminal is also connected. For example, you can connect a separate
grounding cable when vibration isolators are used at the mounting bolts.
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.
Antenna cables
Guidelines
A coaxial cable for connection between the antenna and terminal is delivered with the system. If
you need a different cable, make sure that the cable meets the requirements. Preferably choose
one of the cable types in
Recommended antenna cables
on page 12.
Select a suitable area for installation of the terminal, antenna and cradle. Where the cables are
exposed to mechanical wear - on deck, through bulkheads, etc. - protect the cables with steel
pipes. Otherwise, follow standard procedures for cabling in ship installations.
The maximum allowed RF-loss in the antenna cable is 20 dB at 1660 MHz. This is to ensure the
performance of the system.
Recommended antenna cables
The table below shows recommended cable types and maximum cable lengths for
SAILOR 150 FleetBroadband.
Check in the data sheet from the cable supplier that both the RF- attenuation and the DC-
resistance are kept within the maximum specified values:
•
Antenna cable RF-attenuation at 1660 MHz: max. 20 dB incl. connector.
Cable Type
Absolute maximum length
G02232-D
6 m
RG223-D
25 m
RG214/U
50 m
S 07272B-05
95 m
