Fcc Method - Motorola PTP 800 User Manual

User Guide: PTP 800 Licensed Ethernet Microwave

FCC method

Relevant standards (North America and EC) applicable when working with RF
equipment are:
x
ANSI IEEE C95.1-1991, IEEE Standard for Safety Levels with Respect to
Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300
GHz.
x
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.
x
Health Canada limits for the general population. See the Health Canada web
site at
limites_e.html
x
ICNIRP (International Commission on Non-Ionizing Radiation Protection)
guidelines for the general public. See the ICNIRP web site at
http://www.icnirp.de/
Electric, Magnetic, and Electromagnetic Fields.
Calculation
FCC OET Bulletin 65 specifies the far-field method to calculate power density:
S
Where S = Power density (W/m
of the radio (Watts), G = Antenna gain, R = Distance from point source (meters).
FCC Title 47 Part 1.1310 defines the exposure limit for the general population to be
2
10 W/m
exposure time of 30 minutes. Higher levels are permitted for shorter periods of
exposure.
Rearranging terms to solve for distance yields:
R
phn-1478_005v000
Apr 2010
http://www.hc-sc.gc.ca/ewh-semt/pubs/radiation/99ehd-dhm237/limits-
and Safety Code 6.
and Guidelines for Limiting Exposure to Time-Varying
P G
S
2
4 R
2
(1 mW/cm ) in the frequency range 1500 to 100,000 MHz. This defines an
S
4 S
P G
2
), P = Maximum average transmit power capability
Radiation hazard assessment
4-69