RF exposure

FCC ID: NLMSEP5001RDN

RF Exposure Info

Download: PDF
FCCID_3257193

RF exposure According to FCC part 1.1310 : The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) radiation as specified in § 1.1307(b) Limits for Maximum Permissible Exposure (MPE) Frequency range Electric field Magnetic field Power density Average time (㎒) strength(V/m) strength (A/m) (㎽/㎠) (A) Limits for Occupational / Control Exposures 300 – 1 500 -- -- f/300 6 1 500 - 100000 -- -- 5 6 (B) Limits for General Population / Uncontrol Exposures 300 – 1 500 -- -- f/1500 6 1 500 – 100 000 -- -- 1 30 f= frequency in ㎒ Friis transmission formula: Pd = (Pout×G)/(4×pi×R2) Where, Pd = power density in ㎽/㎠ Pout = output power to antenna in ㎽ G = gain of antenna in linear scale Pi = 3.1416 R = distance between observation point and center of the radiator in cm Pd the limit of MPE, 1 ㎽/㎠. If we know the maximum gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance where the MPE limit is reached. Results – Wi-Fi (Worst case) Max tune-up power Antenna Power density Limit Mode (㏈m) gain (㏈i) at 20 ㎝(㎽/㎠) (㎽/㎠) 802.11b 20.5 2.00 0.035 38 1 802.11g 23.5 2.00 0.070 59 1 802.11n(HT20) 24.0 2.00 0.079 20 1 802.11n(HT40) 24.0 2.00 0.079 20 1 Results – FHSS (Worst case) Max tune-up power Antenna Power density Limit Mode (㏈m) gain (㏈i) at 20 ㎝(㎽/㎠) (㎽/㎠) GFSK 17.0 2.00 0.015 80 1 Results – SUM (Worst case) Wi-Fi Maximum FHSS Maximum Limit Power density Power density Sum(㎽/㎠) (㎽/㎠) at 20 ㎝(㎽/㎠) at 20 ㎝(㎽/㎠) 0.079 20 0.015 80 0.095 1 Note : This device includes two transmitters of FHSS and Wi-Fi. The two transmitters can operate simultaneously. FCC ID: NLMSEP5001RDN Page 1 of 1


Document Created: 2017-01-12 17:12:53
Document Modified: 2017-01-12 17:12:53
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC