RF exposure Info

FCC ID: P27NV842

RF Exposure Info

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FCCID_1495096

Compliance Certification Services Inc. FCC ID: P27NV842 Report No.: T110608210-RP 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 4 Channel wireless Video Server 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: 16.48 dBm (44.4631 mW) IEEE 802.11g mode: 20.72 dBm (118.0321 mW) Max. output power IEEE 802.11n HT 20 MHz mode: 20.20 dBm (104.7129 mW) IEEE 802.11n HT 40 MHz mode: 20.56 dBm (113.7627 mW) 4.53 dBi (Numeric gain: 2.83) MIMO Antenna gain (Max) Total ANT=10*LOG(((10^(4.27/20)+10^(4.53/20))^2)/2)= 7.41 dBi (Numeric gain: 5.5) MPE Evaluation* Evaluation applied SAR Evaluation N/A Remark: The maximum output power is 20.72 dBm (118.0321 mW) at 2462MHz (with 2.83numeric antenna gain.) TEST RESULTS No non-compliance noted. MPE EVALUATION No non-compliance noted. Page 114

Compliance Certification Services Inc. FCC ID: P27NV842 Report No.: T110608210-RP 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 115

Compliance Certification Services Inc. FCC ID: P27NV842 Report No.: T110608210-RP IEEE 802.11b mode: EUT output power = 44.4631 mW Numeric Antenna gain = 2.83 Æ Power density =0.02504 mW / cm2 IEEE 802.11g mode: EUT output power = 118.0321 mW Numeric Antenna gain = 2.83 Æ Power density = 0.066472 mW / cm2 IEEE 802.11n HT 20 MHz mode: EUT output power = 104.7129 mW Numeric Antenna gain = 5.5 Æ Power density = 0.114608 mW / cm2 IEEE 802.11n HT 40 MHz mode: EUT output power = 113.7627 mW Numeric Antenna gain = 5.5 Æ Power density = 0.124513 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 116


Document Created: 2011-06-30 11:35:13
Document Modified: 2011-06-30 11:35:13
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