User's Manual

Table Of Contents

MPI 6000 Multi-Protocol System Guide

For the maximum power level (2 watts) the minimum safe distance is

= 2.68 ft (81.5 cm) for General Public Exposure Limit, and 1.2 ft (36.46 cm) for

Occupational/Controlled Limit

For a typical operating power level of 0.5W (-6dB attenuation from maximum power) the minimum safe dis-

tance is

= 1.339 ft (40.8 cm) for General Public Exposure Limit, and 0.6 ft (18.3 cm) for

Occupational/Controlled Limit

Any distance beyond 2.68 ft (0.82 m) from the antenna is compliant. Because antennas typically are mounted

at heights of 18 ft (5.5 m), the minimum compliance distance should be met and maintained. Typical exposure

levels should be below FCC exposure limits.

For example, a 6 ft (1.8 m) tall person standing in the center of the main lobe of the antenna would experience

maximum RF levels of 0.03 mW/cm

, and typical levels of 0.0075mW/cm

. Even for the more stringent Gen-

eral Public Exposure Limit, the maximum exposure is 1/40

of the compliance level, and the typical exposure

level is 4 times lower than that. For locations not centered in the main lobe of the antenna, the drop off in

antenna gain reduces the radiation exposure for that area. A person standing 6 ft (1.8 m) to the side of an

antenna would experience an additional approximate 10dB drop in power density.

For these reasons, the MPI 6000 falls within FCC exposure limits.