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VHF-UHF Bi-Directional Amplifier Installation and Users Guide
General Information: 1.5 Important Antenna Safety Information
WESTELL.COM
1-800-377-8766
Page 1-5
1.5 Important Antenna Safety Information
Antennas used for the purpose of radiating signals indoors are limited to a maximum
gain of 7 dBi for VHF and 3 dBi for UHF. Each antenna must be positioned to observe
minimum separation requirements from all users and bystanders.
The following guidelines must be used when considering separation distances:
Indoor antennas must be placed so that under normal conditions, personnel
cannot come within:
60 cm (~24 in) of any indoor VHF antenna, or
80 cm (~32 in) of any indoor UHF antenna.
Adhering to this minimum separation will ensure that the employee or
bystander cannot exceed RF exposures beyond the maximum permissible
limit as defined by FCC Regulations section 1.1310 Limits for general
population/uncontrolled exposure.
Outdoor antenna must be positioned so that under normal conditions,
personnel cannot approach closer than 120 cm (~4 ft.). If a directional antenna
having a maximum gain of 11 dBi is used, precautions should be taken to prevent
personnel from routinely passing through the main radiation beam at a distance
closer than specified.