User's Manual

Page 20 of 39
Fleet One Terminal Installation Manual
Below is the table gives the recommended minimum distance d between X- and S-
band radars and the antenna. Antenna damage is normally avoided by applying the
distance.
Antenna l
ocation at the minimum distance from Radar (
S
-
Band)
Radar
Power
Min distance (d) at ±15⁰ vertical
separation
min distance (d) at ±60⁰ vertical
separation
0 - 12 kW 0.5 m 0.3 m
30 kW 1.0 m 0.5 m
50 kW 2.0 m 1.0 m
Antenna l
ocation at the minimum distance from Radar (X
-
Band)
Radar
Power
min distance (d) at ±15⁰ vertical
separation
min distance (d) at ±60⁰ vertical
separation
0 - 12 kW 0.9 m 0.5 m
30 kW 2.4 m 1.2 m
50 kW 4.0 m 2.0 m
Transmitting Equipment < 1GHz
HF and VHF transmitters can also interfere with the performance of the antenna and
also damage the antenna if placed close. The table below gives guide lines to the
minimum distance between the antenna and HF and VHF transmitters.
Antenna l
ocation at the minimum distance from
HF / VHF
Type
Power
Distance
HF < 60MHz 100 W 1.0 m
HF < 60 MHz 500 W 2.5 m
VHF > 60 MHz 25 W 1.5 m
VSAT System
For optimum performance the distance between the antenna and VSAT antennas
should be at least 3 meter.
GPS Antenna
As the antenna transmits power close to the GPS receive band, the minimum
distance to GPS antennas is typically 5 meter.
Other L-Band Systems