Installation manual

Unit Installation Antenna Unit
Apr 2004 11
3
The transceiver unit and the antenna unit are connected by
a single 50 Ω double screen coaxial cable. The maximum
length of the coaxial cable depends on the type of cable
used.
The table below shows the specifications for Thrane &
Thrane A/S standard cables.
Cable Type Max.
Length
RG223 10 m
RG214 30 m
SA07272 50 m
SA12272 70 m
The coaxial cable can be extended if it complies with the
specified losses incl. connection listed below.
• Maximum RF loss, 1525 – 1660 MHz: 10 dB
• Maximum DC loss, R
loop
: 0.5 Ω
Where exposed to mechanical wear - on deck, through
bulkheads, etc. - steel pipes should protect the cables.
Standard procedures should otherwise be followed for
cabling in ship installations.
3.3.2 Antenna Unit Mast Design
The antenna mast must be designed to carry the 4.5 kg
weight of the antenna unit. It must also be able to
withstand wind forces up to 140 knots on the radome as
well as onboard vibrations.