Updated RF Exposure Information

FCC ID: TA8AKRD901059-1

RF Exposure Info

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1 (11) GFTB-17:001589 Uen, Rev C, 2018-10-10 Rapport utfärdad av ackrediterat provningslaboratorium Test report issued by an Accredited Testing Laboratory Ackred. Nr 1761 Provning ISO/IEC 17025 EMF Test Report: Ericsson AIR 5121 Document number: GFTB-17:001589 Uen Date of report: 2018-10-10 Rev C Testing laboratory: Ericsson EMF Research Company/Client: Göran Berglund Laboratory Ericsson AB Ericsson AB SE-164 80 Stockholm SE-164 80 Stockholm Sweden Sweden Tests performed by: Elif Degirmenci Dates of tests: 2018-10-10 (Rev C) This document replaces the GFTB- 17:001589 Uen, Rev B Manufacturer and Ericsson AIR 5121 market name(s) of device: Testing has been European standards: EN 50385:2017, IEC/EN 62232:2017 performed in accordance with: FCC OET Bulletin 65 Test results: The tested equipment complies with the requirements in respect of all parameters subject to the test. Additional information: By inclusion of the test report summary and the content of Appendices B and C in the product documentation, the tested equipment complies with the requirements of EN 50385. Signature: Quality Manager Test Engineer _____________________________ ____________________________________ Björn Thors Elif Degirmenci Senior Specialist - RF Exposure Assessment Experienced Researcher bjorn.thors@ericsson.com elif.degirmenci@ericsson.com Tel: +46 10 717 18 24 Tel: +46107178061 © Telefonaktiebolaget LM Ericsson AB. This report shall not be reproduced except in full, without written approval of the laboratory.

2 (11) GFTB-17:001589 Uen, Rev C, 2018-10-10 1 Summary of EMF Test Report1 Equipment under test (EUT) Product name AIR 5121 Product number KRD 901 059/1, KRD 901 059/4 Supported Tx frequency range (GHz) 27.5 - 28.35 NR, VTF (pre-NR) and standards Duplexing technology and fraction of downlink transmission time to total TDD (89 %) time Exposure environment General public/uncontrolled, Workers/controlled EIRP2 (dBm) and IEC 62232 installation 55 E+ class [9] 1.1 Results RF exposure compliance boundaries, outside of which the exposure is below the general public (GP) and workers (W) exposure limits, are listed below. Dimensions of the box-shaped compliance boundary for general public (GP) and workers (W) exposure for maximum output power including 1.5 dB power tolerance and TDD ratio. Dimensions of the box-shaped compliance boundary (m) Mode and output power for AIR 5121 Distance in Distance front of Width Height behind antenna antenna Standard Nominal EIRP per beam GP W GP W GP W GP W NR, VTF3 (pre-NR) 46 dBm 1.8 0.8 2.3 1.0 1.0 0.5 0 0 1 This page contains a summary of the test results. The full report provides a complete description of all test details and results. 2 The stated EIRP value is the total EIRP without power tolerance included. 3 The abbreviation stands for Verizon technical forum.

3 (11) GFTB-17:001589 Uen, Rev C, 2018-10-10 2 General information The test results presented in this report define compliance boundaries for maximum power configurations for AIR 5121. Outside of these compliance boundaries the radio frequency (RF) exposure levels are below the limits specified by the International Commission on Non-Ionizing Radiation Protection (ICNIRP) [3]-[5] and the Federal Communications Commission (FCC) [6][7]. The tests were performed by calculations in accordance with the Ericsson RF exposure calculation procedure for base stations [8], which is in conformity with the European standards IEC/EN 62232 [9], EN 50385 [2], and FCC OET Bulletin 65 [7] . Recommended product specific EMF health and safety information for Ericsson radio products is found in [1]. By inclusion of the test report summary in [1] and the content of Appendices B and C in the product documentation of the tested equipment, it complies with the documentation requirements listed in clause 8 of EN 50385 [2]. 3 Equipment under test Tables 1 and 2 below summarize the technical data for the equipment under test (EUT) and the antenna properties for the tested antennas. Table 1 Technical data for the EUT. Product name and product number AIR 5121 KRD 901 059/1, KRD 901 059/4 Supported Tx frequency range (GHz), and 27.5 - 28.35 NR, VTF (pre-NR) standards Antennas PAAM (Phased Array Antenna Module) Dimensions, H x W x D (mm) 600 x 300 x 90 Duplexing technology and fraction of TDD (89 %) downlink transmission time to total time Exposure environment General public, Workers EIRP4 (dBm) and IEC 62232 installation 55 E+ class [9] Table 2. EUT antenna properties. Type Internal AAS Number of antenna panels 4 Number of beams 8 Gain5 (dBi) 24 EIRP6 (dBm) per beam 46 Horizontal HPBW7 (degrees) 12°±2° Vertical HPBW7 (degrees) 12°±2° Number of antenna elements (𝑡𝐇,𝑡𝐕) (8,8) (2 polarizations) Element separation distance (πš«π‡,πš«π•) (mm) (5.9, 5.9) Maximum scan range in horizontal plane (degrees) ±60° Maximum scan range in vertical plane (degrees) ±15° 4 The stated EIRP value is the total EIRP without power tolerance included. 5 The stated gain value is the peak beam gain. 6 The stated EIRP value is the peak beam EIRP without power tolerance included. 7 The stated half-power beam widths are for the reference direction (πœƒ,πœ™) = (90°,0°).

4 (11) GFTB-17:001589 Uen, Rev C, 2018-10-10 Table 3 lists the nominal output power from the radio unit (total power from all antenna branches) and the total power delivered to the antenna panels. The total power antenna includes an output power tolerance of 1.5 dB and TDD ratio. Table 3. Nominal output power level and total power level including a tolerance of 1.5 dB and TDD ratio for the EUT. Nominal output power Maximum TDD Total time-averaged power delivered Standard from the radio (dBm/W) downlink/uplink ratio [8] to antenna panels (dBm/W) 31 / 1.26 89:11 32 / 1.58 NR, VTF (pre-NR) 4 Exposure conditions The EUT is intended to be installed on roof-tops, masts, towers, buildings, and similar structures making it possible to ensure that the general public has no access to the EMF compliance boundary. Other installation related exposure conditions are not reasonably foreseeable for the EUT. The maximum TDD downlink/uplink ratio was considered to obtain the maximum time-averaged power delivered to the antenna. Other factors such as beam scanning in elevation and azimuth, RBS utilization, and scheduling time are reasonably foreseeable and will significantly reduce the time-averaged power and the RF exposure. These factors were however not considered in this assessment, which adds to the conservativeness of the obtained compliance boundaries. 5 Exposure limits Table 4 presents the FCC [6] and ICNIRP [3] limits on power density for general public/uncontrolled and workers/controlled exposure in the frequency range used by the EUT. Table 4 RF EMF expsoure limits applicable for the frequency range used by the EUT. Quantity General public / Uncontrolled exposure limit Workers / Controlled exposure limit Power density S (W/m2) 10 50 6 EMF compliance boundary calculations Compliance boundary calculations were conducted according to the Ericsson RF exposure calculation procedure for base stations using large array antennas [8] which is based on the far-field formula assuming a cosine scan loss and a Gaussian beam shape [9],[11]. For convenience, the used formulas taken from [8] are included in Appendix A. A box-shaped compliance boundary is used, characterized by its width, height, and the compliance distances behind and in front of the back plane of the EUT, see Figure 1. Outside of this box the RF exposure is below the exposure limits.

5 (11) GFTB-17:001589 Uen, Rev C, 2018-10-10 Height EUT Width Distance in Distance behind EUT front of EUT Figure 1. Box-shaped structure specifying the compliance boundary for the EUT. The compliance distance behind the EUT is determined using the SAR estimation formula [8],[9]. With the number of elements and the total power level given in Table 2 and Table 3, and the ICNIRP/FCC localized SAR limits for general public and workers, the compliance distance behind the antenna ground plane was found to be less than 1 cm for both general public and workers exposure. Since this distance is much shorter than the thickness of the radio located behind the antenna, the EUT is compliant for touch conditions in the back direction. The obtained compliance boundary dimensions are given in Table 5. Table 5 Dimensions of the box-shaped compliance boundary for general public (GP) and workers (W) exposure for maximum output power with an assumed 1.5 dB power tolerance and TDD ratio. Dimensions of the box-shaped compliance boundary (m) Mode and output power for AIR 5121 Distance in Distance behind Width Height front of EUT EUT Standard Nominal EIRP per beam GP W GP W GP W GP W NR, VTF (pre-NR) 46 dBm 1.8 0.8 2.3 1.0 1.0 0.5 0 0 7 Uncertainty The input parameters were chosen within their range so as to maximize the calculated compliance boundary dimensions. Consequently, the approach described in Section 6 results in an exposure assessment which is conservative. 8 References [1] Ericsson, 5/124 46-LZA 701 6001, “Radio Frequency Electromagnetic Exposure, CDMA/GSM/LTE/WCDMA”. [2] EN 50385, “Product standard to demonstrate the compliance of base station equipment with radio frequency electromagnetic field exposure limits (110 MHz – 100 GHz), when placed on the market”, European Committee for Electrotechnical Standardization (CENELEC), 2017. [3] ICNIRP, “Guidelines for limiting exposure to time-varying electric, magnetic, and electromagnetic fields (up to 300 GHz)”, International Commission on Non-Ionizing Radiation Protection (ICNIRP), Health Physics, vol. 74, pp 494-522, April 1998. [4] 1999/519/EC, “Council Recommendation on the limitation of exposure of the general public to electromagnetic fields (0 Hz to 300 GHz)”, July 1999. [5] 2013/35/EU, “Directive of the European Parliament and of the Council on the minimum health and safety requirements regarding the exposure of workers to the risks arising from physical agents

6 (11) GFTB-17:001589 Uen, Rev C, 2018-10-10 (electromagnetic fields) (20th individual Directive within the meaning of Article 16(1) of Directive 89/391/EEC) and repealing Directive 2004/40/EC”, June 2013. [6] FCC, Code of Federal Regulations CFR title 47, part 1.1310 “Radiofrequency radiation exposure limits”, Federal Communications Commission (FCC), August 1997. [7] FCC, “Evaluating compliance with FCC guidelines for human exposure to radiofrequency electromagnetic fields. OET Bulletin 65. Edition 97-01.” Federal Communications Commission (FCC), Office of Engineering and Technology, August 1997. [8] GFTE-16:001718 Uen, “Ericsson RF exposure calculation procedure for base stations”, Instruction. [9] EN/IEC 62232:2017, Determination of RF field strength, power density and SAR in the vicinity of radio communication base stations for the purpose of evaluating human exposure, 2017 [10] 3GPP TS 36:211, “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Physical channels and modulation”, 2017 [11] Mailloux, “Phased array antenna handbook”, Artech House, 2005. [12] Ericsson, LME-12:001904 Uen, “Exposure to radio frequency electromagnetic fields”. 9 Revision history Rev. Date Description A 2017-10-24 First revision B 2018-01-16 Corrected nominal power per beam and updated results C 2018-10-10 Removed bands, updated standard and product numbers

7 (11) GFTB-17:001589 Uen, Rev C, 2018-10-10 Appendix A. Formulas used to estimate the compliance boundary dimensions The compliance distances in front of, to the left/right and above/below the EUT are determined using the equations below [8] 𝑃𝐴 𝐢𝐷front = πœ†2𝑆lim ( ) 2(𝛼GS,H β€’ 𝛼) 𝐢𝐷left/right = max 𝛼 ≤ 𝛼max,H 𝐢𝐷front cos 𝛼 2 β€’ [ π»π»π‘ƒπ΅π‘Š(𝛼) ] sin (𝛼 2 GS,H ) ( ) 2(𝛼GS,V β€’ 𝛼) 𝐢𝐷up/down = max 𝛼 ≤ 𝛼max,V 𝐢𝐷front cos 𝛼 2 β€’ [ π‘‰π»π‘ƒπ΅π‘Š(𝛼) ] sin (𝛼 2 GS,V ) where 𝛼max,H, 𝛼max,V, π»π»π‘ƒπ΅π‘Š,and π‘‰π»π‘ƒπ΅π‘Š denote the maximum scan angles and the half power beam widths in the horizontal and vertical planes, respectively, and 𝐴 denotes the antenna aperture area given by 𝐴 = 𝑁 𝑦 Δ π‘¦ 𝑁 π‘§Δ π‘§. Furthermore, with πœ† denoting the free space wavelength 4 𝐴H𝛼 + 𝐴H2 𝛼2 + 4𝐴H + 3 𝛼GS,H = 1 ( 2 𝐴H + 3 ) 4 𝐴V𝛼 + 𝐴V2𝛼2 + 4𝐴V + 3 𝛼GS,V = 1 ( 2 𝐴V + 3 ) 4ln 2 𝐴H2 = [π»π»π‘ƒπ΅π‘Š(𝛼)]2 4ln 2 𝐴V2 = [π‘‰π»π‘ƒπ΅π‘Š(𝛼)]2 0.886πœ† π»π»π‘ƒπ΅π‘Š(𝛼) = 𝑁𝑦Δ𝑦cos 𝛼 0.886πœ† π‘‰π»π‘ƒπ΅π‘Š(𝛼) = 𝑁𝑧Δ𝑧cos 𝛼 The compliance distance in the back direction is given by [9] B 𝐷10g 𝑃t 𝐢𝐷gp,occ back = , 𝑁e𝑆𝐴𝑅gp,occ lim

8 (11) GFTB-17:001589 Uen, Rev C, 2018-10-10 B β€’1 gp,occ where 𝐷10g = 0.005 m ⋅ kg , 𝑁e is the number of antenna elements for all panels, and 𝑆𝐴𝑅 lim denotes the SAR limits for general public and workers exposure, respectively.

9 (11) GFTB-17:001589 Uen, Rev C, 2018-10-10 Appendix B. Guidelines on how to install the product The AIR 5121 product (KRD 901 059/1, KRD 901 059/4) shall be installed to make sure that the general public does not have access to the applicable RF EMF compliance boundary. The compliance boundary dimensions were determined for the product transmitting in free space. To consider possible contributions from ambient sources (e.g. other radio products already present on site) or the influence from any reflecting or scattering objects in the vicinity of the product installation, procedures in IEC 62232 [9] apply.

10 (11) GFTB-17:001589 Uen, Rev C, 2018-10-10 Appendix C. Guidelines for workers during installation, maintenance, and repair of the product For AIR 5121 (KRD 901 059/1, KRD 901 059/4), it is possible to work behind the radio without any restrictions related to RF EMF exposure if the product is installed so that contributions from other ambient sources (e.g. other radio products) are not significant and may be neglected. If work needs to be performed within the compliance boundary applicable for workers, the radio equipment shall be powered off, or the power be reduced to a level ensuring that the RF EMF exposure is below the relevant exposure limit for workers. To consider possible contributions from ambient sources (e.g. other radio products already present on site) or the influence from any reflecting or scattering objects in the vicinity of the product installation, procedures in IEC 62232 [9] apply. If work is conducted on behalf of Ericsson, minimum EMF related requirements are provided in[12].

11 (11) GFTB-17:001589 Uen, Rev C, 2018-10-10 Appendix D. Photograph of the EUT Figure D.1 Front view of the AIR 5121 with dimensions.


Document Created: 2018-10-10 10:45:35
Document Modified: 2018-10-10 10:45:35
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