RF Exposure

FCC ID: 2AITM-IOT3288E

RF Exposure Info

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FCCID_3943508

Shenzhen BCTC Testing Co., Ltd. FCC ID:2AITM-IOT3288E 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)

Shenzhen BCTC Testing Co., Ltd. 11.2 Measurement Result Operation Frequency: 2402MHz~2480MHz Power density limited: 1mW/ cm2 Antenna Type: External Antenna Antenna gain: 2dBi, R=20cm mW=10^(dBm/10) Bluetooth DTS: conducted conducted Power density Max Antenna Evaluation result power power Limits Channel Tune-up Freq. modulation power tune-up (mW) (dBm) Gain (mW/cm2) (mW/cm2 ) (MHz) (dBm) power (dBm) Numeric 2402 4.24 6.270 5.5±1 6.5 1.585 0.001408 1 2440 GFSK 3.67 5.649 5.5±1 6.5 1.585 0.001408 1 2480 3.06 4.861 5.5±1 6.5 1.585 0.001408 1 Bluetooth DSS: conducted conducted Power density Max Antenna Evaluation result power power Limits Channel Tune-up Freq. modulation power tune-up (mW) (dBm) Gain (mW/cm2) (mW/cm2 ) (MHz) (dBm) power (dBm) Numeric 2402 6.95 8.421 8±1 9 1.585 0.002504 1 2440 GFSK 7.12 8.525 8±1 9 1.585 0.002504 1 2480 7.17 8.557 8±1 9 1.585 0.002504 1 2402 3.85 5.860 5±1 6 1.585 0.001255 1 Pi/4 2440 3.19 5.036 5±1 6 1.585 0.001255 1 DQPSK 2480 2.60 4.150 5±1 6 1.585 0.001255 1 2402 4.36 6.395 5.5±1 6.5 1.585 0.001408 1 2440 8DPSK 3.52 5.467 5.5±1 6.5 1.585 0.001408 1 2480 2.97 4.724 5.5±1 6.5 1.585 0.001408 1 Operation Frequency: WIFI 802.11b/g/n HT20: 2412-2462MHz, 802.11n HT40: 2422-2452MHz, Power density limited: 1mW/ cm2 Antenna Type: External Antenna Antenna gain: 2dBi R=20cm mW=10^(dBm/10) 802.11b/g/n:

Shenzhen BCTC Testing Co., Ltd. Power Channe conducted conducted Max Antenna Evaluation Tune-up density l Freq. modulation power power tune-up power Gain result power (dBm) Limits (MHz) (mW) (dBm) (dBm) Numeric (mW/cm2 ) (mW/cm2) 2412 802.11b 23.23 13.66 13±1 14 1.585 0.007920 1 2437 802.11b 23.07 13.63 13±1 14 1.585 0.007920 1 2462 802.11b 23.99 13.80 13±1 14 1.585 0.007920 1 2412 802.11g 18.54 12.68 12±1 13 1.585 0.006291 1 2437 802.11g 18.11 12.58 12±1 13 1.585 0.006291 1 2462 802.11g 17.74 12.49 12±1 13 1.585 0.006291 1 802.11n 2412 18.97 12.78 12±1 13 1.585 0.006291 1 H20 802.11n 2437 18.58 12.69 12±1 13 1.585 0.006291 1 H20 802.11n 2462 18.07 12.57 12±1 13 1.585 0.006291 1 H20 simultaneous emission Power density Power density Power density Limits Calculate Evaluation Power density Limits Limits (mW/cm2 ) result Limits (mW/cm2 ) (mW/cm2 ) WIFI (mW/cm2 ) (mW/cm2) BLE BT 0.007920 0.001408 0.002504 0.011832 1 Conclusion: For the max result : 0.011832≤ 1.0, compliance with FCC's RF Exposure.


Document Created: 2018-07-19 20:41:26
Document Modified: 2018-07-19 20:41:26
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