Chapter 1: About This User Guide
17
The applicable ISEDC power density exposure limit for RF energy in unlicensed bands is 0.02619 * (f^
(0.6834)), where f is the lowest frequency of the supported band. For licensed bands, the power density
exposure limit is 0.6455 * (f^ (0.5)), where f is the lowest frequency of the supported band.
Calculation of power density and distance
The following calculation is based on the ANSI IEEE C95.1-1991 method, as that it 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:
P – Maximum average transmit power capability of the radio, in W
G – total Tx gain as a factor, converted from dB
S – power density (W/m
²
)
d – Distance from point source, in cm (Centimeters)
Table 2 :Antenna details
AP
Antenna
G (For 2.4 GHz in dBi)
G (For 5 GHz in dBi)
E400
Omnidirectional
4.55
4.25
e410
Omnidirectional
4.55
4.25
e410b
Omnidirectional
4.55
5.7
e600
Omnidirectional
4.55
4.25
e430
Omnidirectional
3
4
E500
Omnidirectional
5
5
E501S
Sector
10.5
13
e502S
Sector
12.5
15.9
e700
Omnidirectional
7.5
8
e425H
Omnidirectional
4
4.29
e505
Omnidirectional
5
5
e510
Omnidirectional
8
8
For details on minimum safe distance value, please refer below table.
Calculated distances and power compliance margins
Below table displays power density and minimum safe separation distance from point source for each
frequency band and antenna combination for the USA and Canada. These are conservative distances that
include compliance margins.