18
Planning Installation
Avoid RF Interference
Do not install the antenna near the high power shortwave radar. Most radar transmitters emit RF energy within
an elevation range of -15° to +15°. For this reason, It is recommended to position the antenna at least 15 feet
(4.6 m) away from the radar.
Figure: Potential RF Interference
WARNING
WARNING
Never place the antenna in the beam path of the radar regardless of distance. The high power
shortwave radar may impair its performance or damage the antenna.
Figure: RF Hazard Precautions
RF Hazard Precautions
The antenna is designed to be used with radiation transmitting equipment manufactured by others. Exposure
to RF radiation, including exposure associated with an improper use of the transmit equipment, may be
hazardous to persons close to the above deck unit. Ensure the safety of personnel who work on the system.
During transmission, ensure to keep the minimum safety distance. The recommended minimum safety
distance to the reflector on the focal line is about 15 m, based on a radiation level of 5 mW/cm2 that applies
under occupational/controlled environment. No hazard exists >20° below the antenna's mounting plane.
Radar
+15°
-15°
Minimum
4.6m
Antenna
Antenna
Antenna
20°
20°
15m (49 ft)
15m (49 ft)
Radiation Safety Distance
