RF Exposure

FCC ID: O5301749RX24G

RF Exposure Info

Download: PDF
FCCID_3334766

Bay Area Compliance Laboratories Corp. (Chengdu) FCC §15.247 (i) & §1.1310 & §2.1091- MAXIMUM PERMISSIBLE EXPOSURE (MPE) Applicable Standard According to subpart 15.247(i)and subpart §1.1310, systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. Limits for Maximum Permissible Exposure (MPE) (§1.1310, §2.1091) (B) Limits for General Population/Uncontrolled Exposure Frequency Range Electric Field Magnetic Field Power Density Averaging Time 2 (MHz) Strength (V/m) Strength (A/m) (mW/cm ) (minutes) 0.3–1.34 614 1.63 *(100) 30 1.34–30 824/f 2.19/f *(180/f²) 30 30–300 27.5 0.073 0.2 30 300–1500 / / f/1500 30 1500–100,000 / / 1.0 30 f = frequency in MHz; * = Plane-wave equivalent power density; According to §1.1310 and §2.1091 RF exposure is calculated. Calculated Formulary: Predication of MPE limit at a given distance S = PG/4πR² = power density (in appropriate units, e.g. mW/cm2); P = power input to the antenna (in appropriate units, e.g., mW); G = power gain of the antenna in the direction of interest relative to an isotropic radiator, the power gain factor, is normally numeric gain; R = distance to the center of radiation of the antenna (appropriate units, e.g., cm); For simultaneously transmit system, the calculated power density should comply with: Report No.: RDG170301004B Page 10 of 34

Bay Area Compliance Laboratories Corp. (Chengdu) Calculated Data: Maximum Power Evaluation Power MPE Frequency Antenna Gain Mode including Distance Density Limit (MHz) tolerance 2 2 (cm) (mW/cm ) (mW/cm ) (dBi) (numeric) (dBm) (mW) FHSS 2410-2472 0 1.00 -1.0 0.79 20.00 0.0002 1.0 DTS 2412-2462 0 1.00 21 125.89 20.00 0.0251 1.0 Note: The tune-up power including tolerance is declared by manufacturer. The 2.4GHz FHSS and DTS can transmit simultaneously: =SFHSS/Slimit-FHSS + SDTS/Slimit-DTS =0.0002/1+0.0251/1 =0.0253 < 1.0 Result: Compliance, The device meets MPE requirement for Devices Used by the General Public (Uncontrolled Environment) at distance ≥20 cm. Report No.: RDG170301004B Page 11 of 34


Document Created: 2017-03-21 17:15:31
Document Modified: 2017-03-21 17:15:31
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC