MPE Calculation (external antenna - both Tx)

FCC ID: OWS-NIC714

RF Exposure Info

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FCCID_1723630

Sheet1 Silver Spring Networks FCC ID: OWS-NIC714 Calculate mW/cm2 here. Enter frequency in MHz: User Manual Calculation of Limits from 1.1310 Table 1 S1 for 900 MHz 0.60 maximum RFx distance, cm 20 Controlled Uncontrolled S3 for 2.4 GHz 1.00 maximum F(MHz) Actual F, MHz Occ, mW/c2 Gen, mW/cm2 0.3-3 0.5 100.0 100.0 Max RF Power TX Antenna MPE distance S, mW/cm2 S, mW/cm2 at Comment 1 Comment 2 3.0 - 30.0 5 180.0 36.0 P, dBm G, dBi cm at 20 cm dist 20 30.0-300 55 1.0 0.2 cm 300-1500 902 3.0 0.60 29.6 3.00 15.5 0.359 0.359 900 MHz FHSS External antenna 1500-100000 5805 5.0 1.0 22.7 3.6 5.8 0.085 0.085 2.4 GHz FHSS External antenna Enter P(mW) Equivalent dBm Enter dBm Equivalent Watts % 900MHz RFx 59.8% % 2.4 GHz RFx 8.5% Total RFx 68.33% Basis of Calculations: 555 27.44 29.52 895.4 E^2/3770 = S, mW/cm2 E, V/m = (Pwatts*Ggain*30)^.5/d, meters d = ((Pwatts*G*30)/3770*S))^0.5 Pwatts*Ggain = 10^(PdBm-30+GdBi)/10) S@dist2 = S@MPEdist(MPE/dist2)^2 NOTE: For mobile or fixed location transmitters, minimum separation distance is for FCC compliance is 20 cm, even if calculations indicate MPE distance is less Page 1


Document Created: 0260-10-02 00:00:00
Document Modified: 0260-10-02 00:00:00
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