RF Exposure

FCC ID: V7TW311E

RF Exposure Info

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FCCID_2074331

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: R2DG130826003-00A 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 (MHz) Strength (V/m) Strength (A/m) (mW/cm2) (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); Calculated Data: Conducted Evaluation Power MPE Frequency Antenna Gain Mode Power Distance Density Limit (MHz) (dBi) (numeric) (dBm) (mW) (cm) (mW/cm2) (mW/cm2) 802.11b 2462 2 1.58 8.38 6.89 20.00 0.00217 1.0 802.11g 2462 2 1.58 8.48 7.05 20.00 0.00222 1.0 802.11n20 2462 2 1.58 8.59 7.23 20.00 0.00228 1.0 802.11n40 2452 2 1.58 8.11 6.47 20.00 0.00204 1.0 Result: The device meet FCC MPE at 20 cm distance FCC Part 15.247 Page 8 of 62


Document Created: 2013-09-17 11:15:37
Document Modified: 2013-09-17 11:15:37
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