MPE 11n

FCC ID: NDD9574151017

RF Exposure Info

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FCCID_1495928

FCC TEST REPORT Report No.: FR921313-01AI Appendix A. Maximum Permissible Exposure Page No. : A1 of A3 FCC ID : NDD9574151017

FCC TEST REPORT Report No.: FR921313-01AI 1. Maximum Permissible Exposure 1.1. Applicable Standard 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 levels in excess limit for maximum permissible exposure. In accordance with 47 CFR FCC Part 2 Subpart J, section 2.1091 this device has been defined as a mobile device whereby a distance of 0.2 m normally can be maintained between the user and the device. (A) Limits for Occupational / Controlled Exposure Averaging Time Frequency Range Electric Field Magnetic Field Power Density (S) |E|²,|H|² or S (MHz) Strength (E) (V/m) Strength (H) (A/m) (mW/ cm²) (minutes) 0.3-3.0 614 1.63 (100)* 6 3.0-30 1842 / f 4.89 / f (900 / f)* 6 30-300 61.4 0.163 1.0 6 300-1500 F/300 6 1500-100,000 5 6 (B) Limits for General Population / Uncontrolled Exposure Averaging Time Frequency Range Electric Field Magnetic Field Power Density (S) |E|²,|H|² or S (MHz) Strength (E) (V/m) Strength (H) (A/m) (mW/ cm²) (minutes) 0.3-1.34 614 1.63 (100)* 30 1.34-30 824/f 2.19/f (180/f)* 30 30-300 27.5 0.073 0.2 30 300-1500 F/1500 30 1500-100,000 1.0 30 Note: f = frequency in MHz ; *Plane-wave equivalent power density 1.2. MPE Calculation Method 30  P  G E2 E (V/m) = Power Density: Pd (W/m²) = d 377 E = Electric field (V/m) P = Peak RF output power (W) G = EUT Antenna numeric gain (numeric) d = Separation distance between radiator and human body (m) The formula can be changed to Pd = 30  P  G 377  d 2 From the peak EUT RF output power, the minimum mobile separation distance, d=0.2m, as well as the gain of the used antenna, the RF power density can be obtained. Page No. : A2 of A3 FCC ID : NDD9574151017

FCC TEST REPORT Report No.: FR921313-01AI 1.3. Calculated Result and Limit Max Conducted Power for IEEE 802.11n (20MHz) port A: 23.39dBm Test Min. User Conducted Conducted Power Density Gain (dBi) Numeric Gain Mode Distance (cm) Power (dBm) Power (mW) (mW/cm2) 2.4G 20 5 3.162278 23.39 218.2730 0.1374 Max Conducted Power for IEEE 802.11n (20MHz) port B: 23.01dBm Test Min. User Conducted Conducted Power Density Gain (dBi) Numeric Gain Mode Distance (cm) Power (dBm) Power (mW) (mW/cm2) 2.4G 20 5 3.162278 23.01 199.9862 0.1259 IEEE 802.11n (20MHz) port A + port B Power Density = 0.1374 + 0.1259 = 0.2633 (mW/cm2) Max Conducted Power for IEEE 802.11n (40MHz) port A: 21.56dBm Test Min. User Conducted Conducted Power Density Gain (dBi) Numeric Gain Mode Distance (cm) Power (dBm) Power (mW) (mW/cm2) 2.4G 20 5 3.162278 21.56 143.2188 0.0901 Max Conducted Power for IEEE 802.11n (40MHz) port B: 21.27dBm Test Min. User Conducted Conducted Power Density Gain (dBi) Numeric Gain Mode Distance (cm) Power (dBm) Power (mW) (mW/cm2) 2.4G 20 5 3.162278 21.27 133.9677 0.0843 IEEE 82.11n (40MHz) port A + port B Power Density = 0.0901 + 0.0843 = 0.1744 (mW/cm2) Page No. : A3 of A3 FCC ID : NDD9574151017


Document Created: 2011-07-05 17:15:01
Document Modified: 2011-07-05 17:15:01
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