Installation Guide

Compliance with safety standards PMP 450i and PTP 450i Configuration and User
Guide
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:
Where:
Is:
S power density in W/m
2
P maximum average transmit power
capability of the radio, in W
G Total Tx antenna gain as a factor,
converted from dB
d distance from point source, in m
Rearranging terms to solve for distance yields:
Calculated distances and power compliance margins
Calculated minimum separation distances, recommended distances and resulting margins
for each frequency band and antenna combination is shown in Table 4. These are
conservative distances that include compliance margins. At these and greater separation
distances, the power density from the RF field is below generally accepted limits for the
general population.
PMP 450i equipment adheres to all applicable EIRP limits for transmit power when
operating in MIMO mode. Separation distances and compliance margins include
compensation for both transmitters.
Explanation of terms used in Table 4:
P burst – maximum average transmit power during transmit burst (Watt)
P – maximum average transmit power of the radio (Watt)
G – total transmit gain as a factor, converted from dB
S – power density (Watt/m2)
d – minimum safe separation distance from point source (meters)
2
4
.
d
GP
S
π
=
S
GP
d
.4
.
π
=
pmp-0957 (April 2015) 5