User's Manual

FX500R / FX 500 / FX250 Installation cum Operation Manual

Page 16 of 43

Proprietary Information Not To Be Disclosed Without Written Authorisation From

2.1.3 Interference

The antenna unit must be mounted as far as possible away from the ship’s radars, MF/HF

antennas, communication/navigation antennas, VSAT system and any high power radio

transmitter (including other Inmarsat-based system).

As for a ship’s radar (see below), it is difficult to provide the exact minimum distance between

a radar and the antenna unit due to different type of radars in terms of power, radiation

pattern and operating frequency band.

The antenna unit is recommended to be at least 5-meter away from the radar position and at

least ±15 º from the radar’s vertical beam.

Minimum Radar

Distance

5.0m

+15º

-15º

Antenna Unit