MPE Cal

FCC ID: SWX-NS5

RF Exposure Info

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FCCID_909560

                                                                                                       Electromagnetic Compatibility
Ubiquiti Networks                                                                                               Intentional Radiators
NS5                                                                       CFR Title 47, Part 15, Subpart B & C; ICES-003 & RSS-210


Electromagnetic Compatibility Criteria for Intentional Radiators

         § 15.247(b)        Peak Power Output and RF Exposure

RF Exposure Requirements:            §1.1307(b)(1) and §1.1307(b)(2): Systems operating under the provisions of this
                                     section shall be operated in a manner that ensures that the public is not exposed to
                                     radio frequency energy levels in excess of the Commission’s guidelines.

RF Radiation Exposure Limit:         §1.1310: As specified in this section, the Maximum Permissible Exposure (MPE)
                                     Limit shall be used to evaluate the environmental impact of human exposure to
                                     radiofrequency (RF) radiation as specified in Sec. 1.1307(b), except in the case of
                                     portable devices which shall be evaluated according to the provisions of Sec. 2.1093 of
                                     this chapter.

                    MPE Limit Calculation: EUT’s operating frequencies @ 5745 - 5825 MHz; highest conducted power =
                    29.65dBm (peak) therefore, Limit for Uncontrolled exposure: 1 mW/cm2 or 10 W/m2

                    EUT maximum antenna gain = 14 dBi.

                    Equation from page 18 of OET 65, Edition 97-01

                            S = PG / 4πR2      or       R = √PG / 4πS

                    where, S = Power Density (1 mW/cm2)
                           P = Power Input to antenna (922.5mW)
                           G = Antenna Gain (25.11 numeric)

                    R = (922.5*25.11/ 4*3.14*1.0)1/2 = (23173.95 / 12.56) 1/2 = 43cm




MET Report: EMCS80544B-FCC247                       © 2008, MET Laboratories, Inc.



Document Created: 2008-02-20 10:38:46
Document Modified: 2008-02-20 10:38:46

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