RF Exposure report

FCC ID: 2AFRJNKP01

RF Exposure Info

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FCCID_4394545

RF EXPOSURE EVALUATION EUT Specification EUT Noke KeyPad Model Number NKP01 FCC ID 2AFRJNKP01 Antenna gain (Max) 3dBi for BT and 2.4G Operation Frequency 2402-2480MHz for BT and 2.4G Input Rating DC 24V Modulation GFSK for BT and 2.4G Max. output power -0.51dBm(0.000889W) for BT Test Requirement: 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 Power Average Range(MHz) Strength(V/m) Field Density(mW/cm2) Time Strength(A/m) (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

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 Antenna gain: 3 dBi BLE: Antenn Power Measu Tune- Max Channe a Evaluation density red up tune-up Mode l Freq. Gain result Limits power power power (MHz) Numeri (mW/cm2 ) (mW/c (dBm) (dBm) (dBm) c m2 ) GFSK 2402 -0.51 0±1 1 1.995 0.000500 1 GFSK 2440 -0.76 -1±1 0 1.995 0.000397 1 GFSK 2480 -1.07 -1±1 0 1.995 0.000397 1 Signature: Alan He Date: 2019-08-06


Document Created: 2019-08-09 19:23:29
Document Modified: 2019-08-09 19:23:29
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