MPE report

FCC ID: P27-WAP121

RF Exposure Info

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FCCID_1592036

Compliance Certification Services Inc. FCC ID: P27-WAP121 IC: 5604A-WAP121 Report No.: T111024201 APPENDIX I RADIO FREQUENCY EXPOSURE LIMIT According to §15.247(i), 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 of the Commission's guidelines. See § 1.1307(b)(1) of this chapter. EUT Specification EUT Wireless-N Access Point with Power over Ethernet WLAN: 2.412GHz ~ 2.462GHz Frequency band WLAN: 5.18GHz ~ 5.32GHz / 5.50GHz ~ 5.70GHz (Operating) WLAN: 5.745GHz ~ 5.825GHz Others Portable (<20cm separation) Device category Mobile (>20cm separation) Others Occupational/Controlled exposure (S = 5mW/cm2) Exposure classification General Population/Uncontrolled exposure (S=1mW/cm2) Single antenna Multiple antennas Antenna diversity Tx diversity Rx diversity Tx/Rx diversity IEEE 802.11b mode: 20.88 dBm (122.462 mW) IEEE 802.11g mode: 24.37 dBm (273.527 mW) Max. output power IEEE 802.11n HT 20 MHz mode: 21.14 dBm (130.036 mW) IEEE 802.11n HT 40 MHz mode: 25.76 dBm (376.906 mW) 3.55 dBi (Numeric gain: 2.26) Antenna gain (Max) MIMO: 6.16 dBi (Numeric gain: 4.13) MPE Evaluation* Evaluation applied SAR Evaluation N/A Remark: The maximum output power is 25.76dBm (376.906mW) at 2442MHz (with 4.13 numeric antenna gain.) TEST RESULTS No non-compliance noted. MPE EVALUATION No non-compliance noted. Page 135

Compliance Certification Services Inc. FCC ID: P27-WAP121 IC: 5604A-WAP121 Report No.: T111024201 Calculation 30 × P × G E2 Given E= & S= d 3770 Where E = Field strength in Volts / meter P = Power in Watts G = Numeric antenna gain d = Distance in meters S = Power density in milliwatts / square centimeter Combining equations and re-arranging the terms to express the distance as a function of the remaining variables yields: 30 × P × G S= 3770d 2 Changing to units of mW and cm, using: P (mW) = P (W) / 1000 and d (cm) = d(m) / 100 Yields 30 × (P / 1000) × G P×G S= = 0.0796 × 2 Equation 1 3770 × (d / 100) 2 d Where d = Distance in cm P = Power in mW G = Numeric antenna gain S = Power density in mW / cm2 Maximum Permissible Exposure Substituting the MPE safe distance using d = 20 cm into Equation 1: Yields S = 0.000199 × P × G Where P = Power in mW G = Numeric antenna gain S = Power density in mW / cm2 Page 136

Compliance Certification Services Inc. FCC ID: P27-WAP121 IC: 5604A-WAP121 Report No.: T111024201 IEEE 802.11b mode: EUT output power = 122.462 mW Numeric Antenna gain = 2.26 Æ Power density = 0.055076 mW / cm2 IEEE 802.11g mode: EUT output power = 273.527 mW Numeric Antenna gain = 2.26 Æ Power density = 0.123016 mW / cm2 IEEE 802.11n HT 20 MHz mode: EUT output power = 130.036 mW Numeric Antenna gain = 4.13 Æ Power density = 0.106873 mW / cm2 IEEE 802.11n HT 40 MHz mode: EUT output power = 376.906 mW Numeric Antenna gain = 4.13 Æ Power density = 0.309768 mW / cm2 (For mobile or fixed location transmitters, the maximum power density is 1.0 mW/cm2 even if the calculation indicates that the power density would be larger.) Page 137


Document Created: 2011-11-29 11:13:05
Document Modified: 2011-11-29 11:13:05
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