S-156-FCCISED-MPE-2

FCC ID: C3K1843

RF Exposure Info

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MPE TEST REPORT For MODEL NO.: 1843 FCC ID: C3K1843 IC ID: 3048A-1843 Test Report No. S-156-FCCISED-MPE-2 Issue Date: May 6, 2019 FCC 47CFR Parts 1.1307, 1.1310, 2.1091 Innovation, Science and Economic Development Canada RSS-102 Issue 5 Prepared by Microsoft EMC Laboratory 17760 NE 67th Ct, Redmond WA, 98052, U.S.A. 425-421-9799 sajose@microsoft.com TESTING CERT #3472.01 Rev 2.0

FCC ID: C3K1843 IC ID: 3048A-1843 1 Record of Revisions Revision Date Section Page(s) Summary of Changes Author/Revised By: 1.0 04/30/2019 All All Version 1.0 Z. Gray 2.0 05/06/2019 4 6 Added 160 MHz BW to radio Z. Gray description, extended WLAN frequency range to 2472 MHz. Report#: S-156-FCCISED-MPE-2 Issued: May 6, 2019 Page 2 of 13 Microsoft EMC Laboratory

FCC ID: C3K1843 IC ID: 3048A-1843 Table of Contents 1 Record of Revisions ............................................................................................................ 2 2 Deviations from Standards .................................................................................................. 5 3 Facilities and Accreditations ................................................................................................ 5 3.1 Test Facility.................................................................................................................. 5 3.2 Accreditations .............................................................................................................. 5 4 Product Description............................................................................................................. 6 5 MPE Requirements ............................................................................................................. 7 5.1 FCC MPE Requirements.............................................................................................. 7 FCC RF Exposure Exemption Criteria .................................................................. 7 5.2 ISED MPE Requirements............................................................................................. 9 ISED MPE Exemption Requirements from RSS-102 Section 2.5.2 ....................... 9 6 Maximum Device EIRP and ERP .......................................................................................10 7 Evaluation Against Exemption Criteria for RF Exposure Evaluation ...................................11 8 MPE Calculations and Evaluation ......................................................................................12 Report#: S-156-FCCISED-MPE-2 Issued: May 6, 2019 Page 3 of 13 Microsoft EMC Laboratory

FCC ID: C3K1843 IC ID: 3048A-1843 Test Report Attestation Microsoft Corporation Model: 1843 FCC ID: C3K1843 ISED ID: 3048A-1843 Applicable Standards Specification Test Result FCC CFR47 Rule Parts 1.1307, 1.1310, 2.1091 Pass ISED RSS-102 Issue 5 Pass Microsoft EMC Laboratory attests that the product model identified in this report has been tested to and meets the requirements identified in the above standards. The test results in this report solely pertains to the specific sample tested, under the conditions and operating modes as provided by the customer. This test report replaces the previously issued report #S-156-FCCISED-MPE-1 issued by Microsoft EMC Labs. This report shall not be used to claim product certification, approval, or endorsement by A2LA or any agency of any Government. Reproduction, duplication or publication of extracts from this test report is prohibited and requires prior written approval of Microsoft EMC Laboratory. Written By: Zack Gray Reviewed/ Issued By: Daniel Salinas SAR Test Lead Radio Test Lead Report#: S-156-FCCISED-MPE-2 Issued: May 6, 2019 Page 4 of 13 Microsoft EMC Laboratory

FCC ID: C3K1843 IC ID: 3048A-1843 2 Deviations from Standards None. 3 Facilities and Accreditations 3.1 Test Facility All test facilities used to collect the test data are located at Microsoft EMC Laboratory, 17760 NE 67th Ct, Redmond WA, 98052, USA 3.2 Accreditations The lab is established and follows procedures as outlined in IEC/ISO 17025 and A2LA accreditation requirements. A2LA Accredited Testing Certificate Number: 3472.01 FCC Registration Number: US1141 IC Site Registration Numbers: 3048A-3, 3048A-4 Report#: S-156-FCCISED-MPE-2 Issued: May 6, 2019 Page 5 of 13 Microsoft EMC Laboratory

FCC ID: C3K1843 IC ID: 3048A-1843 4 Product Description Company Name: Microsoft Corporation Address: One Microsoft Way City, State, Zip: Redmond, WA 98052-6399 Customer Contact: Choon Ooi Functional Description of the EUT: Smart Display RF Exposure Conditions: Mobile Exposure Conditions (Separation distance of ≥ 20 cm) Model: 1843 FCC ID: C3K1843 IC ID: 3048A-1843 WLAN Main 2.4 GHz: 802.11 b/g/n - 20/40 MHz BW’s WLAN Main 5 GHz: 802.11 a/n/ac - 20, 40, 80, 160 MHz Radio Descriptions: Bluetooth™ (Basic and Enhanced Data Rates) / Bluetooth LE Doppler Radar 2412 – 2472 MHz WLAN: 5180 – 5825 MHz Frequency Range of Operation: BT / BTLE: 2402 – 2480 MHz Doppler: 24.15 – 24.25 GHz WLAN: CCK, BPSK, QPSK, 16-QAM, 64-QAM, 256-QAM Modulations: 𝝅 Bluetooth: GFSK, πŸ’ DQPSK, and 8 DPSK Radio Band Chain 1 Chain 2 WLAN 2412 – 2472 MHz 7 dBi 5.3 dBi 5180 – 5240 MHz 4.7 dBi 4.2 dBi 5260 – 5320 MHz 5 dBi 4.7 dBi Antenna Peak Gains: 5500 – 5700 MHz 4.9 dBi 4.5 dBi 5745 – 5825 MHz 4.3 dBi 3.6 dBi BT / BTLE: 2402 – 2480 MHz 3.6 dBi Doppler Radar: 24.15 – 24.25 GHz 4 dBi EUT Classification: UNII, DTS, FHSS Equipment Design State: Prototype/Production Equivalent Equipment Condition: Good Report#: S-156-FCCISED-MPE-2 Issued: May 6, 2019 Page 6 of 13 Microsoft EMC Laboratory

FCC ID: C3K1843 IC ID: 3048A-1843 5 MPE Requirements 5.1 FCC MPE Requirements The FCC MPE limits from CFR 47 Part 1.1310 are shown in the table below. Frequency Electric field Magnetic field Power Averaging range strength strength density time (MHz) (V/m) (A/m) (mW/cm2) (minutes) (A) Limits for Occupational/Controlled Exposure 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 6 300-1,500 f/300 6 1,500-100,000 5 6 (B) Limits for General Population/Uncontrolled Exposure 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 30 300-1,500 f/1500 30 1,500-100,000 1.0 30 FCC RF Exposure Exemption Criteria The exemption criteria for RF exposure evaluation from CFR 47 Part 2.1091(c) are as follows: (c)(1) Mobile devices that operate in the Commercial Mobile Radio Services pursuant to part 20 of this chapter; the Cellular Radiotelephone Service pursuant to part 22 of this chapter; the Personal Communications Services pursuant to part 24 of this chapter; the Satellite Communications Services pursuant to part 25 of this chapter; the Miscellaneous Wireless Communications Services pursuant to part 27 of this chapter; the Maritime Services (ship earth station devices only) pursuant to part 80 of this chapter; the Specialized Mobile Radio Service, and the 3650 MHz Wireless Broadband Service pursuant to part 90 of this chapter; and the Citizens Broadband Radio Service pursuant to part 96 of this chapter are subject to routine environmental evaluation for RF exposure prior to equipment authorization or use if: (i) They operate at frequencies of 1.5 GHz or below and their effective radiated power (ERP) is 1.5 watts or more, or (ii) They operate at frequencies above 1.5 GHz and their ERP is 3 watts or more. Report#: S-156-FCCISED-MPE-2 Issued: May 6, 2019 Page 7 of 13 Microsoft EMC Laboratory

FCC ID: C3K1843 IC ID: 3048A-1843 (2) Unlicensed personal communications service devices, unlicensed millimeter wave devices and unlicensed NII devices authorized under §§15.253(f), 15.255(g), 15.257(g), 15.319(i), and 15.407(f) of this chapter are also subject to routine environmental evaluation for RF exposure prior to equipment authorization or use if their ERP is 3 watts or more or if they meet the definition of a portable device as specified in §2.1093(b) requiring evaluation under the provisions of that section. (3) All other mobile and unlicensed transmitting devices are categorically excluded from routine environmental evaluation for RF exposure prior to equipment authorization or use, except as specified in §§1.1307(c) and 1.1307(d) of this chapter. Report#: S-156-FCCISED-MPE-2 Issued: May 6, 2019 Page 8 of 13 Microsoft EMC Laboratory

FCC ID: C3K1843 IC ID: 3048A-1843 5.2 ISED MPE Requirements The ISED MPE limits from RSS-102 Issue 5 are shown in the table below. RF Field Strength Limits for Devices Used by the General Public (Uncontrolled Environment) Frequency Electric Field Magnetic Power Reference Range (MHz) (V/m rms) Field Density Period (A/m rms) 2 (minutes) (W/m ) 0.003-1021 83 90 - Instantaneous* 0.1-10 - 0.73/ ƒ - 6** 1.1-10 87/ ƒ 0.5 - - 6** 10-20 27.46 0.0728 2 6 20-48 58.07/ ƒ 0.25 0.1540/ ƒ 0.25 8.944/ ƒ 0.5 6 48-300 22.06 0.05852 1.291 6 300-6000 3.142 ƒ 0.3417 0.008335 ƒ 0.02619ƒ0.6834 6 0.3417 6000-15000 61.4 0.163 10 6 15000-150000 61.4 0.163 10 616000/ ƒ 1.2 150000-300000 0.158 ƒ 0.5 4.21 x 10-4 ƒ 0.5 6.67 x 10-5 ƒ 616000/ ƒ 1.2 Note: ƒ is frequency in MHz. *Based on nerve stimulation (NS). ** Based on specific absorption rate (SAR). ISED MPE Exemption Requirements from RSS-102 Section 2.5.2 RF exposure evaluation is required if the separation distance between the user and/or bystander and the device’s radiating element is greater than 20 cm, except when the device operates as follows: • below 20 MHz and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or less than 1 W (adjusted for tune-up tolerance); • at or above 20 MHz and below 48 MHz and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or less than 22.48/ƒ0.5 W (adjusted for tune-up tolerance), where ƒ is in MHz; • at or above 48 MHz and below 300 MHz and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or less than 0.6 W (adjusted for tune-up tolerance); • at or above 300 MHz and below 6 GHz and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or less than 1.31 x 10-2 ƒ0.6834 W (adjusted for tune-up tolerance), where ƒ is in MHz; • at or above 6 GHz and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or less than 5 W (adjusted for tune-up tolerance). Report#: S-156-FCCISED-MPE-2 Issued: May 6, 2019 Page 9 of 13 Microsoft EMC Laboratory

FCC ID: C3K1843 IC ID: 3048A-1843 6 Maximum Device EIRP and ERP The declared maximum output powers including tune-up tolerances are used in conjunction with the maximum antenna gains to find the maximum EIRP and ERP values. For transmitters with multiple transmit chains, total EIRP and total ERP are calculated as: 𝐸𝐼𝑅𝑃𝑇𝑂𝑇 = 𝐸𝐼𝑅𝑃1 + 𝐸𝐼𝑅𝑃2 + β‹― 𝐸𝐼𝑅𝑃𝑛 𝐸𝑅𝑃𝑇𝑂𝑇 (π‘‘π΅π‘š) = 𝐸𝐼𝑅𝑃𝑇𝑂𝑇 (π‘‘π΅π‘š) − 2.15 𝑑𝐡 Maximum EIRP and ERP of all Device Radios Radio Band Chain Chain Chain Chain Chain Chain Max Max (GHz) A A A B B B Total Total Max Max Max Max Max Max EIRP ERP Power Gain EIRP Power Gain EIRP (dBm) (dBm) (dBm) (dBi) (dBm) (dBm) (dBi) (dBm) WLAN 2.4 17.5 7 24.5 17.5 5.3 22.8 26.74 24.59 WLAN 5.2 17.5 4.7 22.2 17.5 4.2 21.7 24.97 22.82 5.3 17.5 5 22.5 17.5 4.7 22.2 25.36 23.21 5.6 17.5 4.9 22.4 17.5 4.5 22 25.21 23.06 5.8 17.5 4.3 21.8 17.5 3.6 21.1 24.47 22.32 BT / BLE 2.4 5 3.6 8.6 8.6 6.45 Doppler 24.25 6 4 10 10.0 7.85 Radar Report#: S-156-FCCISED-MPE-2 Issued: May 6, 2019 Page 10 of 13 Microsoft EMC Laboratory

FCC ID: C3K1843 IC ID: 3048A-1843 7 Evaluation Against Exemption Criteria for RF Exposure Evaluation Evaluation of Device Radios Against FCC and ISED Exemption Criteria Radio / Band Max FCC FCC Max Total ISED ISED Rulepart (GHz) Total Exemption Exempt? EIRP Exemption Exempt? ERP ERP (mW) EIRP (mW) Limits Limits (mW) (mW) WLAN 15.247 2.4 287.94 NA Yes1 472.38 2702.91 Yes WLAN 15.407 5.2 191.32 3000 Yes 313.87 4560.23 Yes 5.3 209.55 3000 Yes 343.79 4608.31 Yes 5.6 202.53 3000 Yes 332.27 4751.18 Yes 5.8 170.78 3000 Yes 280.18 4895.01 Yes BT / BLE 2.4 4.42 NA Yes1 7.24 4560.23 Yes 15.247 Doppler 24.25 6.10 NA Yes1 10.00 2702.91 Yes Radar 15.249 1 Since 2.1091(c) does not reference Part 15.247 or 15.249, Bluetooth, WLAN 2.4 GHz and Doppler radios are categorically exempted from routine RF exposure evaluation by Part 1.1091(c)(3). All Radios are exempt from routine RF Exposure Evaluation for both FCC and ISED. Report#: S-156-FCCISED-MPE-2 Issued: May 6, 2019 Page 11 of 13 Microsoft EMC Laboratory

FCC ID: C3K1843 IC ID: 3048A-1843 8 MPE Calculations and Evaluation Power densities are calculated for all radios, and the sum totals are compared to the FCC and ISED limits to support the 20 cm minimum device-user separation distance. Power density is calculated as: 𝐸𝐼𝑅𝑃 𝑆= πœ‹π‘… 2 For FCC, the power densities of all radios are calculated and summed to show that the worst case is less than the corresponding power density limits. MPE Power Density Evaluation at 20cm Antenna Band Max Max S FCC FCC S ISED 𝑆 ISED (GHz) EIRP EIRP π‘šπ‘Š Limit Result π‘Š Limit πΏπ‘–π‘šπ‘–π‘‘ Result ( 2) π‘šπ‘Š ( 2) π‘Š (dBm) (mW) π‘π‘š π‘š ( 2) ( ) π‘π‘š π‘š2 WLAN 2.4 26.74 472.38 0.38 1.0 Pass 3.76 5.37 0.70 Pass WLAN 5.2 24.97 313.87 0.25 1.0 Pass 2.50 9.05 0.28 Pass 5.3 25.36 343.79 0.27 1.0 Pass 2.74 9.14 0.30 Pass 5.6 25.21 332.27 0.26 1.0 Pass 2.64 9.43 0.28 Pass 5.8 24.47 280.18 0.22 1.0 Pass 2.23 9.71 0.23 Pass BT / BLE 2.4 8.60 7.24 0.01 1.0 Pass 0.06 5.37 0.01 Pass Doppler 24.25 10.00 10.00 0.01 1.0 Pass 0.08 10 0.01 Pass Radar Total 489.62 0.40 1.0 Pass 0.72 Pass • Since all FCC Bands have the same limit, Max EIRP and power densities are summed and the sum is compared to the FCC MPE limit. • For FCC evaluation, the WLAN band with the highest EIRP is chosen for the worst-case total since the device can only transmit in one WLAN band at a time. • ISED limits for 300 – 6000 MHz are calculated as (from table in section 5.2): π‘Š 𝐼𝑆𝐸𝐷 πΏπ‘–π‘šπ‘–π‘‘ = 0.02619 ∗ 𝑓 0.6834 π‘š2 • For ISED in accordance with RSS-102 Section 3.2, the fractions of the applicable limits are summed and the sum shown to be below 1 since the limits differ by band. • For ISED evaluation, The WLAN band with the highest fraction of the applicable limit is chosen for the worst-case total since the device can only transmit in one WLAN band at a time. Report#: S-156-FCCISED-MPE-2 Issued: May 6, 2019 Page 12 of 13 Microsoft EMC Laboratory

FCC ID: C3K1843 IC ID: 3048A-1843 End of Report Report#: S-156-FCCISED-MPE-2 Issued: May 6, 2019 Page 13 of 13 Microsoft EMC Laboratory


Document Created: 2019-05-15 18:33:23
Document Modified: 2019-05-15 18:33:23
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