Motorola PTP 54500 - Calculations for Separation Distances and Power Compliance Margins

2 Avoiding Hazards
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2 Avoiding Hazards
2.1 Preventing Overexposure to RF Energy
WARNING: To protect from overexposure to RF energy, install the radios for the 500 family
of PTP wireless solutions so as to provide and maintain the minimum separation distances
from all persons as shown in Table 3.
When the system is operational, avoid standing directly in front of the antenna. Strong RF
fields are present when the transmitter is on. The Outdoor Unit (ODU) must not be deployed
in a location where it is possible for people to stand or walk inadvertently in front of the
antenna.
At these and greater separation distances, the power density from the RF field is below
generally accepted limits for the general population.
NOTE: These are conservative distances that include compliance margins.
2.1.1 Calculations for Separation Distances 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 the Health Canada web site at
http://www.hc-sc.gc.ca/ewh-semt/pubs/radiation/99ehd-dhm237/limits-limites_e.html and
Safety Code 6.
• EN 50383:2002 Basic standard for the calculation and measurement of electromagnetic
field strength and SAR related to human exposure from radio base stations and fixed
terminal stations for wireless telecommunication systems (110 MHz - 40 GHz)
• 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/m
2
for RF energy in the 2.4-, 5.2-, 5.4-, 5.8- and 5.9 GHz frequency bands.