MPE Report

FCC ID: 2AJ9T-AL20B

RF Exposure Info

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FCCID_3952595

$FCC ID : 2AJ9T-AL20B RF EXPOSURE EVALUATION According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency(RF) Radiation as specified in §1.1307(b) Limits for Maximum Permissible Exposure (MPE) Frequency Electric Field Magnetic Field Power Average Time Range(MHz) Strength(V/m) Strength(A/m) Density(mW/cm2) (A) Limits for Occupational/Control Exposures 300-1500 -- -- F/300 6 1500-100000 -- -- 5 6 (B) Limits for General Population/Uncontrol Exposures 300-1500 -- -- F/1500 6 1500-100000 -- -- 1 30 11.1 Friis transmission formula: Pd= (Pout*G)\ (4*pi*R2) Where Pd= Power density in mW/cm2 Pout=output power to antenna in mW G= Numeric gain of the antenna relative to isotropic antenna Pi=3.1416 R= distance between observation point and center of the radiator in 20cm Pd the limit of MPE, 1mW/cm2. If we know the maximum gain of the nd total power input to the antenna, through the calculation, we will know the distance where the MPE limit is reached. 11.2 Measurement Result conducted Max Channel conducted Antenna Evaluation Power density power tune-up Freq. modulation power Tune-up power (dBm) Gain result Limits (dBm) power (MHz) (mW) Numeric (mW/cm2 ) (mW/cm2 ) (dBm) 2402 GFSK 2.10 3.22 3dBm to 5dBm 5 1 0.00063 1 2440 GFSK 2.48 3.94 3dBm to 5dBm 5 1 0.00063 1 2480 GFSK 2.55 4.06 3dBm to 5dBm 5 1 0.00063 1$

Document Created: 2018-07-31 17:04:09
Document Modified: 2018-07-31 17:04:09