Cambium Networks cnReach N500, User Manual

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cnReach N500 User Guide
Legal/Regulatory Information
phn-4673_002v000 (March 2018)
6-15
Calculation of power density
The following calculation is based on the ANSI IEEE C95.1-1991 method, as that provides a worst case
analysis. Details of the assessment to EN50383:2002 can be provided, if required.
Peak power density in the far field of a radio frequency point source is calculated as follows:
𝑆𝑆 =
𝑃𝑃𝑃𝑃
4 𝜋𝜋𝑑𝑑
2
Where:
• S is the power density in W/m 2
• P is the average transmit power capability of the radio in W, equal to the configured maximum
transmitter power as a linear number, multiplied by 0.8 to account for the worst case
transmit/receive ratio
• G is the effective antenna gain, including cable losses, expressed as a linear number (not in dBi)
• d is the distance from the antenna
Rearranging terms to solve for distance yields:
𝑑𝑑 =
� 𝑃𝑃𝑃𝑃
4 𝜋𝜋𝑆𝑆
Calculated distances
Error! Reference source not found.shows calculated minimum separation distances each frequency
band and for the highest gain antenna of each type, assuming that the equipment is operating at the
maximum transmit power for cnReach. At these and greater separation distances, the power density
from the RF field is below generally accepted limits for the general population.
Calcul des distances pour la conformité aux limites de radiation
radiofréquence
Le tableau ci-dessous indique les distances minimales de séparation calculées, les distances
recommandées et les marges de sécurité qui en découlent pour chaque bande de fréquence et chaque
antenne. À ces distance et des distance supérieures, la densité de puissance du champ de
radiofréquence est inférieur aux limites généralement admises pour la population.