PMP 450 Configuration and User Guide
pmp-0050 (May 2012)
3-1
Exposure Separation Distances
To protect from overexposure to RF energy, install PMP 450 radios so as to provide and maintain the
minimum separation distances from all persons shown in
Table 64
Exposure Separation Distances
Module Type
Separation Distance from Persons
PMP 450 AP or SM
At least 20 cm (approx 8 in)
Details of Exposure Separation Distances Calculations and Power
Compliance Margins
Limits and guidelines for RF exposure come from:
US FCC limits for the general population. See the FCC web site at http://www.fcc.gov, and the policies,
guidelines, and requirements in Part 1 of Title 47 of the Code of Federal Regulations, as well as the
guidelines and suggestions for evaluating compliance in FCC OET Bulletin 65.
Health Canada limits for the general population. See Safety Code 6 on the Health Canada web site at
http://www.hc-sc.gc.ca/.
ICNIRP (International Commission on Non-Ionizing Radiation Protection) guidelines for the general
public. See the ICNIRP web site at http://www.icnirp.de/ and Guidelines for Limiting Exposure to Time-
Varying Electric, Magnetic, and Electromagnetic Fields.
The applicable power density exposure limits from the documents referenced above are
10 W/m2 for RF energy in the 5.7-GHz frequency band.
Peak power density in the far field of a radio frequency point source is calculated as follows:
S
P G
4
d
2
where
S
= power density in W/m
2
P
= RMS transmit power capability of the radio, in W
G
= total Tx gain as a factor, converted from dB
d
= distance from point source, in m
Rearranging terms to solve for distance yields
d
P G
4
S
shows calculated minimum separation distances
d
, recommended distances and resulting power
compliance margins for each frequency band and antenna combination.
Summary of Contents for PMP 450
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