NorthStar Navigation Class B Transceiver NAIS-300 - Manual (Page 11)

Installation 11
The cable can be routed in the molding to drop down
directly underneath, or by breaking out the thin traps, the
cable can be routed out of the side of the antenna.
Alternatively, the antenna may be fixed on a standard 1”
threaded mounting pole (Not supplied). Attach the supplied
mounting base to the antenna with the four screws, thread
the cable down the center hole and through the pole.
Thread the pole into the mounting base, before attaching
the pole to the superstructure.
To minimize interference, place the antenna in a position
away from steel constructions, wires, metal masts, sources
of electrical interference, such as radar etc. If installing
the GPS antenna close to other antennas, mount it either
above or below their radiation beams.
The antenna cable is terminated in a screw fit connector
(SMA). Push the antenna plug into the socket on the side
of the unit and screw down the retaining collar.
Figure. 2.3 - Antenna connections
2.9 VHF antenna (
not supplied
)
North American Users - To meet FCC (Federal
Communications Commission) rules on Radio Frequency
Exposure, it is recommended that the VHF antenna
is mounted at least 3m (10ft) away from any area
accessible to any personnel on board. If this distance is
achieved by vertical separation, the antenna must be at
least 5m (16.5ft) above deck. This guideline applies only
to antennas not exceeding 3dBi gain.
Failure to observe these recommendations may
expose those within the MPE (Maximum Permitted
Exposure) radius of 1m (3ft) to RF absorption levels
that exceed the FCC safe limits.
 
 
N
A
IS
-3
00
R
x
Tx
B
IIT
P
WR
210mm (8.27in) 167.5mm (6.6in)
73.5mm 2.9in
VHF Antenna
GPS Antenna