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1. HOW TO INSTALL THE UNIT
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• FELCOM 250: Personnel should not approach an area in which the radiation level is higher than
10 W/m2, i.e., within 0.70 m from the radome surface.
Construct a protective fence around the antenna unit so that personnel can not approach the
antenna unit within 0.70 m. Also, to alert personnel not to approach the antenna unit, attach the
radiation warning sticker (supplied as installation materials) to any bulkhead which is at the po-
sition of 0.70 m from the antenna unit.
Minimum distance from other antennas
MF/HF antennas, communication/navigation antennas:
The antenna unit should be at least five meters from a MF/HF antenna. The VHF, satellite navi-
gation antenna and other communication antennas should be at least four meters away.
Radar:
The antenna unit should be at least 5 meters away to protect the low-noise amplifier in the FEL-
COM 500/FELCOM 250 antenna unit. If this distance cannot be secured be sure the antenna unit
is not within the radar beam. However, never install the antenna unit within 3 m of a radar antenna.
Distance from radar antenna
MICROWAVE RADIATION !
NO ADMITTANCE WITHIN 0.7 m
0.7 m
More than 5 m
If installed within 5 m of
radar antenna, the antenna
unit must not be within the
radar beam. Never install
the antenna unit within 3 m.
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