User's Manual

Eclipse2 Technical Manual, 3-Aug-12 Page 17 of 17
RF Exposure.
This transmitter exciter constitutes a RF transmitting system that both the FCC and
Industry Canada has established RF exposure requirements for. In order to comply with the
RF exposure requirements of both countries the transmitting antenna must maintain a specific
physical separation from all persons. The antennas for this device usually are mounted on
outdoor permanent structures and the installer must see that the separation distance be maintained.
The RF exposure report was written for one typical power output and antenna gain.
If your situation is different than the one described your minimum separation distance will be different.
RF exposure takes into account many different contributing factors some of which are: power output,
system losses, coax cable losses, and antenna gain.
For a typical installation of a 3 dBi antenna and 3 W UHF band (470-495 MHz) transmitter.
Operated in a radio system were the average ratio of transmit to receive time is near
100% transmitting the separation distance would be 0.33 meters or approximately 1.5 feet.
This separation distance also does not take into account any other transmitters that might be
considered co-located at the same site. An RF exposure report was prepared for this transmitter
and in it are the typical calculations on which the above is based.