Installation and Operating Manual

User Manual
040003A010 Rev A Page 24 of 25
4. In instances where the effective antenna gain (antenna gain feedline loss) differs from
the example above, the MPE radius must be calculated by the licensee. Table 4-1 presents
the results of calculations of the MPE radius for a 250 Watt 406 MHz transmitter having
various effective antenna gain values.
Table 6-1 Calculations of the MPE Radius for a 250 Watt 406 MHz Transmitter
WARNING: Failure to observe the minimum safe distance radius may result in exposure to RF
radiated energy in excess of the FCC Maximum Permissible Exposure (MPE) limit.
The licensee is responsible for the safe operation of the base site and must ensure
that the Maximum Permissible Exposure limits are observed at all times.
Effective Antenna Gain
(dBi)
Minimum Safe Distance
(meters)
Minimum Safe Distance
(feet)
3.0
3.83
12.6
4.0
4.30
14.1
5.0
4.82
15.8
6.0
5.41
17.7
7.0
6.07
19.9
8.0
6.81
22.3
9.0
7.64
25.1
10.0
8.57
28.1