RF EXPOSURE

FCC ID: LDK-CLX300

RF Exposure Info

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FCCID_1652355

Compliance Certification Services Inc. FCC ID: LDK-CLX300 Report No.: T120201G02 -RP1 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 Cisco Small Business Telepresence WLAN: 2.412GHz ~ 2.462GHz Frequency band (Operating) WLAN: 5.745GHz ~ 5.825GHz Others: Bluetooth: 2.402GHz ~ 2.480GHz 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: 14.16 dBm(26.0615mW) Max. output power IEEE 802.11g mode: 19.65 dBm(92.2571mW) IEEE 802.11n HT 20 MHz mode: 18.48 dBm(70.4693mW) Antenna gain (Max) 2.26 dBi (Numeric gain: 1.68) MPE Evaluation* Evaluation applied SAR Evaluation N/A Remark: The maximum output power is 19.65dBm (92.2571mW) at 2412MHz (with 1.68 numeric antenna gain.) TEST RESULTS No non-compliance noted. MPE EVALUATION No non-compliance noted. Page 91

Compliance Certification Services Inc. FCC ID: LDK-CLX300 Report No.: T120201G02 -RP1 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 92

Compliance Certification Services Inc. FCC ID: LDK-CLX300 Report No.: T120201G02 -RP1 IEEE 802.11b mode: EUT output power = 26.0615 mW Numeric Antenna gain = 1.68 Æ Power density = 0.008713 mW / cm2 IEEE 802.11g mode: EUT output power = 92.2571 mW Numeric Antenna gain = 1.68 Æ Power density = 0.030843 mW / cm2 IEEE 802.11n HT 20 MHz mode: EUT output power = 70.4693 mW Numeric Antenna gain = 1.68 Æ Power density = 0.023559 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 93

Compliance Certification Services Inc. FCC ID: LDK-CLX300 Report No.: T120201G02 -RP1 EUT Cisco Small Business Telepresence WLAN: 2.412GHz ~ 2.462GHz Frequency band (Operating) WLAN: 5.725GHz ~ 5.850GHz Others: Bluetooth: 2.402GHz ~ 2.480GHz 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 802.11a mode: 17.12 dBm (51.5229mW) Max. output power IEEE 802.11n HT 20 MHz mode: 16.13 dBm (41.0204mW) Antenna gain (Max) 4.61 dBi (Numeric gain: 2.89) MPE Evaluation* Evaluation applied SAR Evaluation N/A Remark: The maximum output power is 17.12dBm (51.5229mW) at 5745MHz (with 2.89 numeric antenna gain.) TEST RESULTS No non-compliance noted. MPE EVALUATION No non-compliance noted. Page 94

Compliance Certification Services Inc. FCC ID: LDK-CLX300 Report No.: T120201G02 -RP1 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 95

Compliance Certification Services Inc. FCC ID: LDK-CLX300 Report No.: T120201G02 -RP1 IEEE 802.11a mode: EUT output power = 51.5299 mW Numeric Antenna gain = 2.89 Æ Power density = 0.029635 mW / cm2 IEEE 802.11n HT 20 MHz mode: EUT output power = 41.0204 mW Numeric Antenna gain = 2.89 Æ Power density =0.023591 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 96


Document Created: 2012-03-08 17:17:22
Document Modified: 2012-03-08 17:17:22
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