MPE Calculation 2400 MHz

FCC ID: OWS-NIC514

RF Exposure Info

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FCCID_1378343

Sheet1 Silver Spring Networks FCC ID: OWS-NIC514 2.4 GHz DTS Radio Distance, cm Distance, cm Distance, cm Center meter Left Meter Right Meter 21 26.40 26.40 mW/cm2 from Table1: 1.00 0.6 0.6 Max RF Power TX Antenna MPE distance S, mW/cm Comment P, dBm G, dBi cm 20.80 3.00 4.4 0.043 Center Meter contribution 29.86 4.00 18.0 0.278 Left Meter contribution 29.86 4.00 18.0 0.278 Right meter contribution 16cm 16cm Worst Case RFx total 4.3% % center 2.4 GHz 46.3% % left 900 MHz 46.3% % right 900 MHz d cm 2 2 0.5 (d +16 ) TOTAL 96.9% <100% Basis of Calculations: MPE: S=0.6 mW/cm2 at d cm 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@20cm = 20 log (MPE dist/20cm) 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: 2010-11-06 21:18:10
Document Modified: 2010-11-06 21:18:10
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