3800I_2800I_FCC_MPE_2

FCC ID: LDK102100

RF Exposure Info

Download: PDF
FCCID_2949472

EDCS- 1550850 RF Exposure Study - Engineering Analysis per FCC 2.1091 AIR-AP3802I-B-K9 AIR-AP3802I-UXK9 AIR-AP2802I-B-K9 AIR-AP2802I-UXK9 Cisco Aironet 802.11ac Dual Band Access Points FCC ID: LDK102100 Prepared By: Cisco Systems Inc 170 West Tasman San Jose, CA 95134 USA

EDCS- 1550850 1.0: Attestation Statement of Compliance The Cisco AIR-AP3802E-B-K9, 802.11AC radio has been evaluated for Maximum Permissible Exposure in compliance with 47 Code of Federal Regulations 2.1091. The evaluation was in accordance with methodology as referenced in FCC Bulletin OET 65C (rev 01-01) along with KDB 447498 D01 General RF Exposure Guidance. This report serves as the additional technical analysis of the Cisco radio modules This study addresses the addition of an additional pair of transmitters using the data derived in the afore mentioned report # 2.4GHz DTS report EDCS-1550039 5GHz UNII-1 report EDCS-1550042, 1550800 5GHz UNII-2 report EDCS- 1550228, 1550804 5GHz UNII-2ext reports EDCS-1550437, 1550808 5GHz UNII-3 report EDCS-1550258, 1550815 The limits used for this evaluation are in line with the recommendations of the World Health Organizations (WHO) International Committee on Non Ionizing Radiation Protection (ICNIRP) as well as the American National Standards Institute (ANSI) C95.1. The limits chosen are of General Population/Uncontrolled Exposure. the following case scenarios were used : 2.4GHz WLAN 5GHz WLAN 5GHz XOR WLAN This device must be installed to provide a separation distance of at least 30 cm from all persons. Installers must be provided with antenna installation and transmitter operating conditions for satisfying RF exposure compliance. Based on the study this case scenario, the General Population/Uncontrolled Exposure and the minimum recommended distance is around 30cm (12 inches) from the antenna. Jose Aguirre Cisco Systems Inc Corporate Compliance and Certifications 125 West Tasman Drive San Jose, CA 95134 Email: joaguirr@cisco.com

EDCS- 1550850 2.0 EUT Description. The Cisco Aironet 802.11ac Radio supports the following modes of operation. The modes are further defined in the radio Theory of Operation. The modes included in this report represent the worst case data for all modes. 802.11n/ac - Non HT/VHT20, One Antenna, 6 to 54 Mbps 802.11n/ac - Non HT/VHT20, Two Antennas, 6 to 54 Mbps 802.11n/ac - Non HT/VHT20, Three Antennas, 6 to 54 Mbps 802.11n/ac - Non HT/VHT20, Four Antennas, 6 to 54 Mbps 802.11n/ac - Non HT/VHT20 Beam Forming, Two Antennas, 6 to 54 Mbps 802.11n/ac - Non HT/VHT20 Beam Forming, Three Antennas, 6 to 54 Mbps 802.11n/ac - Non HT/VHT20 Beam Forming, Four Antennas, 6 to 54 Mbps 802.11n/ac - HT/VHT20, One Antenna, M0 to M7 802.11n/ac - HT/VHT20, Two Antennas, M0 to M7 802.11n/ac - HT/VHT20, Two Antennas, M8 to M15 802.11n/ac - HT/VHT20, Three Antennas, M0 to M7 802.11n/ac - HT/VHT20, Three Antennas, M8 to M15 802.11n/ac - HT/VHT20, Three Antennas, M16 to M23 802.11n/ac - HT/VHT20, Four Antennas, M0 to M7 802.11n/ac - HT/VHT20, Four Antennas, M8 to M15 802.11n/ac - HT/VHT20, Four Antennas, M16 to M23 802.11n/ac - HT/VHT20 Beam Forming, Two Antennas, M0 to M7 802.11n/ac - HT/VHT20 Beam Forming, Two Antennas, M8 to M15 802.11n/ac - HT/VHT20 Beam Forming, Three Antennas, M0 to M7 802.11n/ac - HT/VHT20 Beam Forming, Three Antennas, M8 to M15 802.11n/ac - HT/VHT20 Beam Forming, Three Antennas, M16 to M23 802.11n/ac - HT/VHT20 Beam Forming, Four Antennas, M0 to M7 802.11n/ac - HT/VHT20 Beam Forming, Four Antennas, M8 to M15 802.11n/ac - HT/VHT20 Beam Forming, Four Antennas, M16 to M23 802.11n/ac - HT/VHT20 STBC, Two Antennas, M0 to M7 802.11n/ac - HT/VHT20 STBC, Three Antennas, M0 to M7 802.11n/ac - HT/VHT20 STBC, Four Antennas, M0 to M7 802.11n/ac - Non HT/VHT40 Duplicate, One Antenna, 6 to 54 Mbps 802.11n/ac - Non HT/VHT40 Duplicate, Two Antennas, 6 to 54 Mbps 802.11n/ac - Non HT/VHT40 Duplicate, Three Antennas, 6 to 54 Mbps 802.11n/ac - Non HT/VHT40 Duplicate, Four Antennas, 6 to 54 Mbps 802.11n/ac - HT/VHT40, One Antenna, M0 to M7 802.11n/ac - HT/VHT40, Two Antennas, M0 to M7 802.11n/ac - HT/VHT40, Two Antennas, M8 to M15 802.11n/ac - HT/VHT40, Three Antennas, M0 to M7 802.11n/ac - HT/VHT40, Three Antennas, M8 to M15 802.11n/ac - HT/VHT40, Three Antennas, M16 to M23 802.11n/ac - HT/VHT40, Four Antennas, M0 to M7 802.11n/ac - HT/VHT40, Four Antennas, M8 to M15 802.11n/ac - HT/VHT40, Four Antennas, M16 to M23

EDCS- 1550850 802.11n/ac - HT/VHT40 Beam Forming, Two Antennas, M0 to M7 802.11n/ac - HT/VHT40 Beam Forming, Two Antennas, M8 to M15 802.11n/ac - HT/VHT40 Beam Forming, Three Antennas, M0 to M7 802.11n/ac - HT/VHT40 Beam Forming, Three Antennas, M8 to M15 802.11n/ac - HT/VHT40 Beam Forming, Three Antennas, M16 to M23 802.11n/ac - HT/VHT40 Beam Forming, Four Antennas, M0 to M7 802.11n/ac - HT/VHT40 Beam Forming, Four Antennas, M8 to M15 802.11n/ac - HT/VHT40 Beam Forming, Four Antennas, M16 to M23 802.11n/ac - HT/VHT40 STBC, Two Antennas, M0 to M7 802.11n/ac - HT/VHT40 STBC, Three Antennas, M0 to M7 802.11n/ac - HT/VHT40 STBC, Four Antennas, M0 to M7 802.11n/ac - Non HT/VHT80 Duplicate, One Antenna, 6 to 54 Mbps 802.11n/ac - Non HT/VHT80 Duplicate, Two Antennas, 6 to 54 Mbps 802.11n/ac - Non HT/VHT80 Duplicate, Three Antennas, 6 to 54 Mbps 802.11n/ac - Non HT/VHT80 Duplicate, Four Antennas, 6 to 54 Mbps 802.11n/ac - HT/VHT80, One Antenna, M0 to M7 802.11n/ac - HT/VHT80, Two Antennas, M0 to M7 802.11n/ac - HT/VHT80, Two Antennas, M8 to M15 802.11n/ac - HT/VHT80, Three Antennas, M0 to M7 802.11n/ac - HT/VHT80, Three Antennas, M8 to M15 802.11n/ac - HT/VHT80, Three Antennas, M16 to M23 802.11n/ac - HT/VHT80, Four Antennas, M0 to M7 802.11n/ac - HT/VHT80, Four Antennas, M8 to M15 802.11n/ac - HT/VHT80, Four Antennas, M16 to M23 802.11n/ac - HT/VHT80 Beam Forming, Two Antennas, M0 to M7 802.11n/ac - HT/VHT80 Beam Forming, Two Antennas, M8 to M15 802.11n/ac - HT/VHT80 Beam Forming, Three Antennas, M0 to M7 802.11n/ac - HT/VHT80 Beam Forming, Three Antennas, M8 to M15 802.11n/ac - HT/VHT80 Beam Forming, Three Antennas, M16 to M23 802.11n/ac - HT/VHT80 Beam Forming, Four Antennas, M0 to M7 802.11n/ac - HT/VHT80 Beam Forming, Four Antennas, M8 to M15 802.11n/ac - HT/VHT80 Beam Forming, Four Antennas, M16 to M23 802.11n/ac - HT/VHT80 STBC, Two Antennas, M0 to M7 802.11n/ac - HT/VHT80 STBC, Three Antennas, M0 to M7 802.11n/ac - HT/VHT80 STBC, Four Antennas, M0 to M7 802.11n/ac - Non HT/VHT160 Duplicate, One Antenna, 6 to 54 Mbps 802.11n/ac - Non HT/VHT160 Duplicate, Two Antennas, 6 to 54 Mbps 802.11n/ac - Non HT/VHT160 Duplicate, Three Antennas, 6 to 54 Mbps 802.11n/ac - Non HT/VHT160 Duplicate, Four Antennas, 6 to 54 Mbps 802.11n/ac - HT/VHT160, One Antenna, M0 to M7 802.11n/ac - HT/VHT160, Two Antennas, M0 to M7 802.11n/ac - HT/VHT160, Two Antennas, M8 to M15 802.11n/ac - HT/VHT160, Three Antennas, M0 to M7 802.11n/ac - HT/VHT160, Three Antennas, M8 to M15 802.11n/ac - HT/VHT160, Three Antennas, M16 to M23 802.11n/ac - HT/VHT160, Four Antennas, M0 to M7 802.11n/ac - HT/VHT160, Four Antennas, M8 to M15 802.11n/ac - HT/VHT160, Four Antennas, M16 to M23 802.11n/ac - HT/VHT160 Beam Forming, Two Antennas, M0 to M7 802.11n/ac - HT/VHT160 Beam Forming, Two Antennas, M8 to M15 802.11n/ac - HT/VHT160 Beam Forming, Three Antennas, M0 to M7 802.11n/ac - HT/VHT160 Beam Forming, Three Antennas, M8 to M15 802.11n/ac - HT/VHT160 Beam Forming, Three Antennas, M16 to M23 802.11n/ac - HT/VHT160 Beam Forming, Four Antennas, M0 to M7

EDCS- 1550850 802.11n/ac - HT/VHT160 Beam Forming, Four Antennas, M8 to M15 802.11n/ac - HT/VHT160 Beam Forming, Four Antennas, M16 to M23 802.11n/ac - HT/VHT160 STBC, Two Antennas, M0 to M7 802.11n/ac - HT/VHT160 STBC, Three Antennas, M0 to M7 802.11n/ac - HT/VHT160 STBC, Four Antennas, M0 to M7 The following antennas are supported by this product series. The data included in this report represent the worst case data for all antennas. Antenna Gain Frequency Part Number Antenna Type (dBi) 5 GHz Internal Directional (5G XOR) 6 2.4 / 5 GHz Internal Omni (2.4G XOR / 5G Dedicated) 4/5

EDCS- 1550850 3.0 Methodology All calculations were made in accordance with ANSI C95.1, and FCC OET 65C. 4.0 Technical Requirements 4.1 Single Band Operation – Limits FCC Limits for Maximum Permissible Exposure (MPE) (A) Limits for Occupational/Controlled Exposure Frequency Electric Field Magnetic Field Power Density Averaging Time Range Strength (E) Strength (H) (S) |E|2, |H|2 or S (MHz) (V/m) (A/m) (mW/cm2) (minutes) 0.3-3.0 614 1.63 (100)* 6 3.0-30 1842/f 4.89/f (900/f2)* 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 Frequency Electric Field Magnetic Field Power Density Averaging Time Range Strength (E) Strength (H) (S) |E|2, |H|2 or S (MHz) (V/m) (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 NOTE 1: See Section 1 for discussion of exposure categories. NOTE 2: The averaging time for General Population/Uncontrolled exposure to fixed transmitters is not applicable for mobile and portable transmitters. See 47 CFR §§2.1091 and 2.1093 on source-based time-averaging requirements for mobile and portable transmitters.

EDCS- 1550850 5.0 Calculations Given E=√(30*P*G)/d and S=E^2/3770 where E=Field Strength in Volts/meter P=Power in Watts G=Numeric Antenna Gain d=Distance in meters S=Power Density in mW/cm^2 Combine equations and rearrange the terms to express the distance as a function of the remaining variables: d=√((30*P*G)/(3770*S)) Changing to units of power in mW and distance in cm, using: P(mW)=P(W)/1000 d(cm)=100*d(m) yields d=100*√((30*(P/1000)*G)/(3770*S)) d=0.282*√(P*G/S) where d=Distance in cm P=Power in mW G=Numeric Antenna Gain S=Power Density in mW/cm^2 Substituting the logarithmic form of power and gain using: P(mW)=10^(P(dBm)/10) G(numeric)=10^(G(dBi)/10) yields d=0.282*10^((P+G)/20)/√S Equation (1) and s=((0.282*10^((P+G)/20))/d)^2 Equation (2) where d=MPE distance in cm P=Power in dBm G=Antenna Gain in dBi S=Power Density in mW/cm^2

EDCS- 1550850 6.0 Results Equation (1) and the measured peak power are used to calculate the MPE distance. Note that for mobile or fixed location transmitters such as an access point, the minimum separation distance is 30 cm even if the calculations indicate that the MPE distance may be less. S=1mW/cm^2 maximum. The highest supported antenna gain is 6 dBi (12dBi with 4Tx beam forming). Using the peak power levels recorded in the test report along with Equation 1 above, the MPE distances are calculated as follows. MPE Calculations: Peak Power Transmit Antenna MPE Density Power Gain Distance Limit Margin Band (mW/cm^2) (dBm) (dBi) (cm) (cm) (cm) 2.4GHz DTS 1 23.3 10* 13.04 30 16.96 5GHz UNII-1 1 25 5 8.92 30 21.08 5GHz UNII-2 1 23.9 5 7.86 30 22.14 5GHz UNII-2e 1 21.5 8* 8.42 30 21.58 5GHz UNII-3 1 23.9 11* 15.68 30 14.32 5GHz XOR UNII-1 1 23.7 12* 17.19 30 12.81 5GHz XOR UNII-2 1 22 8* 8.92 30 21.08 5GHz XOR UNII-2e 1 22 8* 8.92 30 21.08 5GHz XOR UNII-3 1 21.6 12* 13.50 30 16.50 *Correlated Gain To maintain compliance, installations will assure a separation distance of at least 30cm. Using Equation 2, the MPE levels (s) at 30 cm are calculated as follows: Peak MPE Transmit Antenna Power Distance Power Gain Density Limit Margin Band (cm) (dBm) (dBi) (mW/cm^2) (mW/cm^2) (mW/cm^2) 2.4GHz DTS 30 23.3 10* 0.19 1 0.81 5GHz UNII-1 30 25 5 0.09 1 0.91 5GHz UNII-2 30 23.9 5 0.07 1 0.93 5GHz UNII-2e 30 21.5 8* 0.08 1 0.92 5GHz UNII-3 30 23.9 11* 0.27 1 0.73 5GHz XOR UNII-1 30 23.7 12* 0.33 1 0.67 5GHz XOR UNII-2 30 22 8* 0.09 1 0.91 5GHz XOR UNII-2e 30 22 8* 0.09 1 0.91 5GHz XOR UNII-3 30 21.6 12* 0.20 1 0.80 *Correlated Gain

EDCS- 1550850 Calculations with additional transmitters Scenerio 1 : 2.4GHz WLAN ( Highest power) 5GHz only WLAN (Highest power) TX1 + TX2 = % of standard ( 0.19) + (0.27) = 0.46 D (estimate) = 30* % D = 20.5cm which is less than 30cm recommended The configuration above co-location calculation is for General Population/Uncontrolled exposure. The minimum distance recommended is 30cm (12 inches) when all antennas are within 30cm of each other. Scenerio 2 : 5GHz only WLAN (Highest power) 5GHz XOR WLAN (Highest power) TX2 +TX3 = % of standard ( 0.27) + (0.33) = 0.60 D (estimate) = 30* % D = 23.3cm which is less than 30cm recommended The configuration above co-location calculation is for General Population/Uncontrolled exposure. The minimum distance recommended is 30cm (12 inches) when all antennas are within 30cm of each other.

EDCS- 1550850 References American National Standards Institute (ANSI), "Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz," ANSI/IEEE C95.1-1992 (previously issued as IEEE C95.1-1991). Copyright 1992 by the Institute of Electrical and Electronics Engineers, Inc. (IEEE), New York, N.Y. 10017. For copies contact the IEEE: 1-800-678-4333 or 1-908-981-1393. American National Standards Institute (ANSI), "Recommended Practice for the Measurement of Potentially Hazardous Electromagnetic Fields - RF and Microwave”. ANSI/IEEE C95.3-1992. Copyright 1992, The Institute of Electrical and Electronics Engineers, Inc. (IEEE), New York, NY 10017. For copies contact the IEEE: 1-800-678-4333 or 1-908-981-1393. FCC OET 65C Evaluating Compliance with FCC Guidelines for Human Exposure to RF Fields from 9KHz to 40 Ghz


Document Created: 2017-11-22 22:24:23
Document Modified: 2017-11-22 22:24:23
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC