Installation and Operating Manual

User Manual
040003A009 Rev D 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 928 MHz transmitter having
various effective antenna gain values.
Table 6-1 Calculations of the MPE Radius for a 250 Watt 928 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.
NOTE: This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
 Reorient or relocate the receiving antenna.
 Increase the separation between the equipment and receiver.
 Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
 Consult the dealer or an experienced radio/TV technician for help.
Effective Antenna Gain
(dBi)
Minimum Safe Distance
(meters)
Minimum Safe Distance
(feet)
3.0
2.53
8.31
4.0
2.84
9.32
5.0
3.19
10.46
6.0
3.58
11.74
7.0
4.01
13.17
8.0
4.50
14.78
9.0
5.05
16.58
10.0
5.67
18.60