RF Exposure Info

FCC ID: 2AL3B-ESPF1

RF Exposure Info

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FCCID_4238861

FCC ID:2AL3B-ESPF1 RF EXPOSURE EVALUATION According to FCC 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 Electric Field Magnetic Field Power Average Time Range(MHz) Strength(V/m) Strength(A/m) Density(mW/cm2) (A) Limits for Occupational/Control Exposures 300-1500 -- -- F/300 6 1500-100000 -- -- 5 6 (B) Limits for General Population/Uncontrol Exposures 300-1500 -- -- F/1500 6 1500-100000 -- -- 1 30 11.1 Friis transmission formula: Pd= (Pout*G)\ (4*pi*R2) Where Pd= Power density in mW/cm2 Pout=output power to antenna in mW G= Numeric gain of the antenna relative to isotropic antenna Pi=3.1416 R= distance between observation point and center of the radiator in cm(20cm) Pd the limit of MPE, 1mW/cm2. If we know the maximum gain of the antenna and total power input to the antenna, through the calculation, we will know the distance where the MPE limit is reached. mW=10^(dBm/10)

11.2 Measurement Result Operation Frequency: 2412MHz~2462MHz Power density limited: 1mW/ cm2 Antenna Type: PCB Antenna Antenna gain: 2.0dBi, R=20cm mW=10^(dBm/10) WiFi: Max Channel conducted conducted Tune-up Antenna Power density tune-up Evaluation result Freq. modulation power power power Gain Limits power (MHz) (dBm) (dBm) (mW) (dBm) Numeric (mW/cm2) (mW/cm2 ) 2412 11.5 14.13 11±1 12 1.58 0.0050 1 2437 802.11b 10.9 12.30 11±1 12 1.58 0.0050 1 2462 10.5 11.22 11±1 12 1.58 0.0050 1 2412 11.1 12.88 11±1 12 1.58 0.0050 1 2437 802.11g 10.8 12.02 11±1 12 1.58 0.0050 1 2462 10.4 10.96 11±1 12 1.58 0.0050 1 2412 11.4 13.80 11±1 12 1.58 0.0050 1 802.11n 2437 10.9 12.30 11±1 12 1.58 0.0050 1 HT20 2462 10.4 10.96 11±1 12 1.58 0.0050 1 Conclusion: For the max result : 0.0050≤ 1.0 for 1g SAR, No SAR is required. Signature: Date: 2019-04-09 NAME AND TITLE (Please print or type): Jason Chen/Manager COMPANY (Please print or type): Shenzhen NTEK Testing Technology Co., Ltd./ 1/F, Building E, Fenda Science Park, Sanwei Community, Xixiang Street Bao’an District, Shenzhen P.R. China.


Document Created: 2019-04-09 20:36:22
Document Modified: 2019-04-09 20:36:22
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