12857633-S1V3 FCC Report_SAR

FCC ID: C3K1873

RF Exposure Info

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FCCID_4463888

SAR EVALUATION REPORT IEEE Std 1528-2013 For Portable Computing Device Model Name: 1873 Report Number: 12857633-S1V3 Issue Date: 9/24/2019 Prepared for Microsoft Corporation One Microsoft Way Redmond, WA 98052 USA Prepared by UL VERIFICATION SERVICES INC. 47173 BENICIA STREET FREMONT, CA 94538, USA TEL: (510) 319-4000 FAX: (510) 661-0888 NVLAP LAB CODE 200065-0

Report No.:12857633 -S1V3 Issue Date: 9/24/2019 Revision History Rev. Date Revisions Revised By V1 9/11/2019 Initial Issue -- V2 9/23/2019 Updated per TCB Reviewer Feedback Christopher Kuwatani Section 9.2: Updated Targets V3 9/24/2019 Coltyce Sanders Appendix B: Added system check plot Page 2 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.:12857633 -S1V3 Issue Date: 9/24/2019 Table of Contents 1. Attestation of Test Results ......................................................................................................... 4 2. Test Specification, Methods and Procedures............................................................................ 5 3. Facilities and Accreditation ........................................................................................................ 5 4. SAR Measurement System & Test Equipment .......................................................................... 6 4.1. SAR Measurement System ........................................................................................................ 6 4.2. SAR Scan Procedures ............................................................................................................... 7 4.3. Test Equipment.......................................................................................................................... 9 5. Measurement Uncertainty ........................................................................................................... 9 6. Device Under Test (DUT) Information ...................................................................................... 10 6.1. DUT Description ...................................................................................................................... 10 6.2. Wireless Technologies ............................................................................................................. 10 7. RF Exposure Conditions (Test Configurations) ...................................................................... 11 8. Dielectric Property Measurements & System Check .............................................................. 12 8.1. Dielectric Property Measurements ........................................................................................... 12 8.2. System Check.......................................................................................................................... 14 9. Conducted Output Power Measurements................................................................................ 15 9.1. Wi-Fi 2.4GHz (DTS Band) ....................................................................................................... 15 9.2. Wi-Fi 5GHz (U-NII Bands)........................................................................................................ 16 10. Measured and Reported (Scaled) SAR Results ....................................................................... 19 10.1. Wi-Fi (DTS Band) ................................................................................................................. 20 10.2. Wi-Fi (U-NII Band) ................................................................................................................ 20 10.3. Standalone SAR Test Exclusion Considerations & Estimated SAR ...................................... 21 11. SAR Measurement Variability ................................................................................................... 22 12. Simultaneous Transmission SAR Analysis ............................................................................. 23 12.1. Sum of the SAR for Wi-Fi & BT ............................................................................................ 23 Appendixes .......................................................................................................................................... 24 Appendix A: SAR Setup Photos ......................................................................................................... 24 Appendix B: SAR System Check Plots ............................................................................................... 24 Appendix C: SAR Highest Test Plots .................................................................................................. 24 Appendix D: SAR Tissue Ingredients.................................................................................................. 24 Appendix E: SAR Probe Certificates................................................................................................... 24 Appendix F: SAR Dipole Certificates .................................................................................................. 24 Page 3 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.:12857633 —S1V3 Issue Date: $24/2019 1. Attestation of Test Results Microsoft Corporation C3K1873 1873 General Population/Uncontrolled Exposure Published RF exposure KDB procedures IEEE Std 1528—2013 8/21/2019 to 8/23/2019 and 9/23/2019 Pass UL Verification Services Inc. tested the above equipmentin accordance with the requirements set forth in the above standards. The test results show that the equipment tested is capable of demonstrating compliance with the requirements as documented in this report. The results documented in this report apply only to the tested sample, under the conditions and modes of operation as described herein. It is the manufacturer‘s responsibility to assure that additional production units of this model are manufactured with identical electrical and mechanical components. All samples tested were in good operating condition throughout the entire test program. Measurement Uncertainties are published for informational purposes only and were not taken into account unless noted otherwise. This document may not be altered or revised in any way unless done so by UL Verification Services Inc. and all revisions are duly noted in the revisions section. Any alteration of this document not carried out by UL Verification Services Inc. will constitute fraud and shall nullify the document. This report must not be used by the client to claim product certification, approval, or endorsement by NVLAP, NIST, any agency of the Federal Government, or any agency of the U.S. government. Approved & Released By: Prepared By: /,}@é@_ Chaistophtit Xuwatani Dave Weaver Christopher Kuwatani Operations Leader Laboratory Technician UL Verification Services Inc. UL Verification Services Inc. Page 4 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.:12857633 -S1V3 Issue Date: 9/24/2019 2. Test Specification, Methods and Procedures The tests documented in this report were performed in accordance with FCC 47 CFR § 2.1093, IEEE STD 1528- 2013, the following FCC Published RF exposure KDB procedures: • KDB 865664 D01 (Section 3.5): SAR Measurement 100 MHz to 6 GHz v01r04 • KDB 248227 D01: 802.11 Wi-Fi SAR v02r02 • KDB 447498 D01: General RF exposure Guidance v06 (see Notice-DRS0001 for exemptions) • KDB 616217 D04: SAR for Laptops and Tablets v01r02 In addition to the above, the following information was used: o TCB workshop October 2016; RF Exposure Procedures (DUT Holder Perturbations) o TCB workshop May 2017; RF Exposure Procedures (Broadband Liquid Above 3 GHz) o TCB workshop April 2019; RF Exposure Procedures (Tissue Simulating Liquids (TSL)) o TCB workshop October 2016; RF Exposure Procedures (Bluetooth Duty Factor) 3. Facilities and Accreditation The test sites and measurement facilities used to collect data are located at 47173 Benicia Street 47266 Benicia Street SAR Lab A SAR Lab 1 SAR Lab B SAR Lab 2 SAR Lab C SAR Lab 3 SAR Lab D SAR Lab 4 SAR Lab E SAR Lab 5 SAR Lab F SAR Lab 6 SAR Lab G SAR Lab 7 SAR Lab H SAR Lab 8 UL Verification Services Inc. is accredited by NVLAP, Laboratory Code 200065-0. Page 5 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

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Report No.:12857633 -S1V3 Issue Date: 9/24/2019 4.2. SAR Scan Procedures Step 1: Power Reference Measurement The Power Reference Measurement and Power Drift Measurements are for monitoring the power drift of the device under test in the batch process. The minimum distance of probe sensors to surface determines the closest measurement point to phantom surface. The minimum distance of probe sensors to surface is 2.1 mm. This distance cannot be smaller than the distance of sensor calibration points to probe tip as defined in the probe properties. Step 2: Area Scan The Area Scan is used as a fast scan in two dimensions to find the area of high field values, before doing a fine measurement around the hot spot. The sophisticated interpolation routines implemented in DASY software can find the maximum locations even in relatively coarse grids. When an Area Scan has measured all reachable points, it computes the field maximal found in the scanned area, within a range of the global maximum. The range (in dB) is specified in the standards for compliance testing. For example, a 2 dB range is required in IEEE Standard 1528 and IEC 62209 standards, whereby 3 dB is a requirement when compliance is assessed in accordance with the ARIB standard (Japan). If only one Zoom Scan follows the Area Scan, then only the absolute maximum will be taken as reference. For cases where multiple maximums are detected, the number of Zoom Scans has to be increased accordingly. Area Scan Parameters extracted from KDB 865664 D01 SAR Measurement 100 MHz to 6 GHz Page 7 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.:12857633 -S1V3 Issue Date: 9/24/2019 Step 3: Zoom Scan Zoom Scans are used to assess the peak spatial SAR values within a cubic averaging volume containing 1 g and 10 g of simulated tissue. The Zoom Scan measures points (refer to table below) within a cube whose base faces are centered on the maxima found in a preceding area scan job within the same procedure. When the measurement is done, the Zoom Scan evaluates the averaged SAR for 1 g and 10 g and displays these values next to the job’s label. Zoom Scan Parameters extracted from KDB 865664 D01 SAR Measurement 100 MHz to 6 GHz Step 4: Power drift measurement The Power Drift Measurement measures the field at the same location as the most recent power reference measurement within the same procedure, and with the same settings. The Power Drift Measurement gives the field difference in dB from the reading conducted within the last Power Reference Measurement. This allows a user to monitor the power drift of the device under test within a batch process. The measurement procedure is the same as Step 1. Page 8 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.:12857633 -S1V3 Issue Date: 9/24/2019 4.3. Test Equipment The measuring equipment used to perform the tests documented in this report has been calibrated in accordance with the manufacturers’ recommendations and is traceable to recognized national standards. Dielectric Property Measurements Name of Equipment Manufacturer Type/Model Serial No. Cal. Due Date Vector Network Analyzer Rhode & Schwarz ZNLE6 101273-va 4/24/2020 Dielectric Probe kit SPEAG DAK-3.5 1103 2/12/2020 Shorting Block* SPEAG DAK-3.5 Short SM DAK 200 DA 9/11/2019 Shorting Block SPEAG DAK-3.5 Short SM DAK 200 DA 11/6/2019 Thermometer Keysight Traceable 170064398 5/21/2020 Notes: *Equipment not used past calibration due date. System Check Name of Equipment Manufacturer Type/Model Serial No. Cal. Due Date Signal Generator Rhode & Schwarz SMB100A 180969-yC 2/13/2020 Power Sensor Rhode & Schwarz NRP18A 100995-hs 2/15/2020 Signal Generator Rhode & Schwarz SMB100A 180968-gX 2/14/2020 Power Sensor Rhode & Schwarz NRP18A 100992-iu 2/15/2020 Lab Equipment Name of Equipment Manufacturer Type/Model Serial No. Cal. Due Date E-Field Probe (SAR Lab 1) SPEAG EX3DV4 3885 9/18/2019 E-Field Probe (SAR Lab 3) SPEAG EX3DV4 7500 4/18/2020 Data Acquisition Electronics (SAR Lab 1) SPEAG DAE4 1544 3/19/2020 Data Acquisition Electronics (SAR Lab 3) SPEAG DAE4 1472 3/21/2020 System Validation Dipole SPEAG D2450V2 899 3/22/2020 System Validation Dipole SPEAG D5GHzV2 1168 11/30/2019 System Validation Dipole SPEAG D5GHzV2 1003 2/19/2020 Other Name of Equipment Manufacturer Type/Model Serial No. Cal. Due Date Power Meter Agilent N1921A MY55196004 1/30/2020 Power Sensor Agilent N1921A MY52270022 2/6/2020 Power Sensor Agilent N1921A MY53260010 2/6/2020 5. Measurement Uncertainty Per KDB 865664 D01 SAR Measurement 100 MHz to 6 GHz, when the highest measured 1-g SAR within a frequency band is < 1.5 W/kg and the measured 10-g SAR within a frequency band is < 3.75 W/kg. The expanded SAR measurement uncertainty must be ≤ 30%, for a confidence interval of k = 2. If these conditions are met, extensive SAR measurement uncertainty analysis described in IEEE Std 1528-2013 is not required in SAR reports submitted for equipment approval. Therefore, the measurement uncertainty is not required. Page 9 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.:12857633 -S1V3 Issue Date: 9/24/2019 6. Device Under Test (DUT) Information 6.1. DUT Description Device Dimension See Appendix A Battery Options The battery is not user accessible. Accessory N/A S/N IMEI Notes Test sample information 009078492757 N/A WLAN Radiated/Conducted 009055292757 N/A WLAN Radiated/Conducted Hardware Version DV Software Version 18362.19h1 6.2. Wireless Technologies Wireless Duty Cycle used for SAR Frequency bands Operating mode technologies testing 802.11b 802.11g 2.4 GHz DTS: 99.03% (802.11b) 1 802.11n (HT20) 802.11n (HT40) 802.11a 802.11n (HT20) Wi-Fi 802.11n (HT40) UNII-2A: 90.37% (802.11n 40MHz BW) 1 5 GHz 802.11ac (VHT20) UNII-3: 82.72% (802.11ac 80MHz BW) 1 802.11ac (VHT40) 802.11ac (VHT80) Bluetooth BR, EDR, LE N/A2 Does this device support bands 5.60 ~ 5.65 GHz? ☒ Yes ☐ No Does this device support Band gap channel(s)? ☒ Yes ☐ No Notes: 1. Duty cycle for Wi-Fi is referenced from the DTS and UNII reports. 2. Measured Duty Cycle is not required due to SAR test exemption. Page 10 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.:12857633 -S1V3 Issue Date: 9/24/2019 7. RF Exposure Conditions (Test Configurations) Refer to Appendix A for the specific details of the antenna-to-antenna and antenna-to-edge(s) distances. Wireless RF Exposure DUT-to-User Test Antenna-to- SAR technologies Conditions Separation Position edge/surface Required WLAN/BT Standalone 0 mm Rear N/A Yes ANT 1 WLAN Standalone 0 mm Rear N/A Yes ANT 2 Page 11 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.:12857633 -S1V3 Issue Date: 9/24/2019 8. Dielectric Property Measurements & System Check 8.1. Dielectric Property Measurements The temperature of the tissue-equivalent medium used during measurement must also be within 18°C to 25°C and within ± 2°C of the temperature when the tissue parameters are characterized. The dielectric parameters must be measured before the tissue-equivalent medium is used in a series of SAR measurements. The parameters should be re-measured after each 3 – 4 days of use; or earlier if the dielectric parameters can become out of tolerance; for example, when the parameters are marginal at the beginning of the measurement series. Tissue dielectric parameters were measured at the low, middle and high frequency of each operating frequency range of the test device. The dielectric constant (εr) and conductivity (σ) of typical tissue-equivalent media recipes are expected to be within ± 5% of the required target values; but for SAR measurement systems that have implemented the SAR error compensation algorithms documented in IEEE Std 1528-2013, to automatically compensate the measured SAR results for deviations between the measured and required tissue dielectric parameters, the tolerance for εr and σ may be relaxed to ± 10%. This is limited to frequencies ≤ 3 GHz. Tissue Dielectric Parameters FCC KDB 865664 D01 SAR Measurement 100 MHz to 6 GHz Head Body Target Frequency (MHz) εr σ (S/m) εr σ (S/m) 150 52.3 0.76 61.9 0.80 300 45.3 0.87 58.2 0.92 450 43.5 0.87 56.7 0.94 835 41.5 0.90 55.2 0.97 900 41.5 0.97 55.0 1.05 915 41.5 0.98 55.0 1.06 1450 40.5 1.20 54.0 1.30 1610 40.3 1.29 53.8 1.40 1800 – 2000 40.0 1.40 53.3 1.52 2450 39.2 1.80 52.7 1.95 3000 38.5 2.40 52.0 2.73 5000 36.2 4.45 49.3 5.07 5100 36.1 4.55 49.1 5.18 5200 36.0 4.66 49.0 5.30 5300 35.9 4.76 48.9 5.42 5400 35.8 4.86 48.7 5.53 5500 35.6 4.96 48.6 5.65 5600 35.5 5.07 48.5 5.77 5700 35.4 5.17 48.3 5.88 5800 35.3 5.27 48.2 6.00 IEEE Std 1528-2013 Refer to Table 3 within the IEEE Std 1528-2013 Page 12 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.:12857633 -S1V3 Issue Date: 9/24/2019 Dielectric Property Measurements Results: Relative Perm ittivity (єr) Conductivity (σ) SAR Band Tissue Frequency Date Delta Delta Lab (MHz) Type (MHz) Measured Target Measured Target (%) (%) 2450 50.74 52.70 -3.72 2.01 1.95 3.28 1 8/21/2019 2450 Body 2400 50.80 52.77 -3.74 1.97 1.90 3.79 2480 50.76 52.66 -3.61 2.03 1.99 1.85 Relative Perm ittivity (єr) Conductivity (σ) SAR Band Tissue Frequency Date Delta Delta Lab (MHz) Type (MHz) Measured Target Measured Target (%) (%) 5250 47.91 48.95 -2.13 5.32 5.35 -0.58 3 8/22/2019 5250 Body 5150 48.12 49.09 -1.97 5.18 5.24 -1.17 5350 47.74 48.82 -2.20 5.45 5.47 -0.32 5600 47.28 48.48 -2.47 5.81 5.76 0.83 3 8/22/2019 5600 Body 5500 47.46 48.61 -2.37 5.66 5.64 0.33 5725 47.06 48.31 -2.58 5.98 5.91 1.21 5750 46.98 48.27 -2.68 6.01 5.94 1.28 3 8/22/2019 5750 Body 5700 47.11 48.34 -2.55 5.95 5.88 1.27 5850 46.79 48.20 -2.93 6.16 6.00 2.60 5600 48.17 48.48 -0.63 5.53 5.76 -4.10 3 9/10/2019 5600 Body 5500 48.33 48.61 -0.58 5.38 5.64 -4.63 5725 47.91 48.31 -0.82 5.71 5.91 -3.28 5250 48.52 48.95 -0.88 5.14 5.35 -4.02 3 9/10/2019 5250 Body 5150 48.72 49.09 -0.75 5.00 5.24 -4.55 5350 48.35 48.82 -0.96 5.26 5.47 -3.78 5600 47.36 48.48 -2.31 5.81 5.76 0.78 3 9/23/2019 5600 Body 5500 47.53 48.61 -2.23 5.66 5.64 0.22 5725 47.12 48.31 -2.46 6.00 5.91 1.53 Page 13 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.:12857633 -S1V3 Issue Date: 9/24/2019 8.2. System Check SAR system verification is required to confirm measurement accuracy, according to the tissue dielectric media, probe calibration points and other system operating parameters required for measuring the SAR of a test device. The system verification must be performed for each frequency band and within the valid range of each probe calibration point required for testing the device. The same SAR probe(s) and tissue-equivalent media combinations used with each specific SAR system for system verification must be used for device testing. When multiple probe calibration points are required to cover substantially large transmission bands, independent system verifications are required for each probe calibration point. A system verification must be performed before each series of SAR measurements using the same probe calibration point and tissue-equivalent medium. Additional system verification should be considered according to the conditions of the tissue-equivalent medium and measured tissue dielectric parameters, typically every three to four days when the liquid parameters are re-measured or sooner when marginal liquid parameters are used at the beginning of a series of measurements. System Performance Check Measurement Conditions: • The measurements were performed in the flat section of the TWIN SAM or ELI phantom, shell thickness: 2.0 ±0.2 mm (bottom plate) filled with Body or Head simulating liquid of the following parameters. • The depth of tissue-equivalent liquid in a phantom must be ≥ 15.0 cm for SAR measurements ≤ 3 GHz and ≥ 10.0 cm for measurements > 3 GHz. • The DASY system with an E-Field Probe was used for the measurements. • The dipole was mounted on the small tripod so that the dipole feed point was positioned below the center marking of the flat phantom section and the dipole was oriented parallel to the body axis (the long side of the phantom). The standard measuring distance was 10 mm (above 1 GHz) and 15 mm (below 1 GHz) from dipole center to the simulating liquid surface. • The coarse grid with a grid spacing of 15 mm was aligned with the dipole. For 5 GHz band - The coarse grid with a grid spacing of 10 mm was aligned with the dipole. • Special 7x7x7 (below 3 GHz) and/or 8x8x7 (above 3 GHz) fine cube was chosen for the cube. • Distance between probe sensors and phantom surface was set to 3 mm. For 5 GHz band - Distance between probe sensors and phantom surface was set to 2.5 mm • The dipole input power (forward power) was 100 mW. • The results are normalized to 1 W input power. System Check Results The 1-g and 10-g SAR measured with a reference dipole, using the required tissue-equivalent medium at the test frequency, must be within ±10% of the manufacturer calibrated dipole SAR target. Refer to Appendix B for the SAR System Check Plots. Measured Results for 1g SAR Measured Results for 10g SAR SAR Tissue Dipole Type Dipole Plot Date Lab Type _Serial # Cal. Due Data Zoom Scan Normalize Target Delta Zoom Scan Normalize Target Delta No. to 100 mW to 1 W (Ref. Value) ±10 % to 100 mW to 1 W (Ref. Value) ±10 % 1 8/21/2019 Body D2450V2 SN:899 3/22/2020 5.450 54.50 50.00 9.00 2.510 25.10 23.50 6.81 1,2 Measured Results for 1g SAR Measured Results for 10g SAR SAR Tissue Dipole Type Dipole Plot Date Lab Type _Serial # Cal. Due Data Zoom Scan Normalize Target Delta Zoom Scan Normalize Target Delta No. to 100 mW to 1 W (Ref. Value) ±10 % to 100 mW to 1 W (Ref. Value) ±10 % 3 8/22/2019 Body D5GHzV2 SN:1168 (5.25 GHz) 11/30/2019 7.750 77.50 71.20 8.85 2.180 21.80 19.90 9.55 3,4 3 8/22/2019 Body D5GHzV2 SN:1168 (5.60 GHz) 11/30/2019 8.330 83.30 76.20 9.32 2.310 23.10 21.20 8.96 5,6 3 8/22/2019 Body D5GHzV2 SN:1168 (5.75 GHz) 11/30/2019 7.590 75.90 70.70 7.36 2.110 21.10 19.70 7.11 7,8 3 9/10/2019 Body D5GHzV2 SN:1003 (5.60 GHz) 2/19/2020 8.290 82.90 79.30 4.54 2.330 23.30 22.30 4.48 9,10 3 9/10/2019 Body D5GHzV2 SN:1003 (5.25 GHz) 2/19/2020 6.730 67.30 74.40 -9.54 1.890 18.90 20.80 -9.13 11,12 3 9/23/2019 Body D5GHzV2 SN:1003 (5.60 GHz) 2/19/2020 8.110 81.10 79.30 2.27 2.300 23.00 22.30 3.14 13,14 Page 14 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.:12857633 -S1V3 Issue Date: 9/24/2019 9. Conducted Output Power Measurements 9.1. Wi-Fi 2.4GHz (DTS Band) Maximum Output Power (Tune-up Limit) for Wi-Fi 2.4 GHz The maximum output power specified for production units are determined for all applicable 802.11 transmission modes in each standalone and aggregated frequency band. Maximum output power is measured for the highest maximum output power configuration(s) in each frequency band according to the default power measurement procedures. For “Not required”, SAR Test reduction was applied from KDB 248227 guidance, Sec. 2.1, b), 1) when the same maximum power is specified for multiple transmission modes in a frequency band, the largest channel bandwidth, lowest order modulation, lowest data rate and lowest order 802.11b/g/n mode is used for SAR measurement, on the highest measured output power channel in the initial test configuration, for each frequency band. Additional output power measurements were not deemed necessary. Wi-Fi 2.4GHz Measured Results ANT1 Average Pow er (dBm ) ANT 2 Average Pow er (dBm ) Freq. Band Mode Ch # SAR Test SAR Test (MHz) Meas Pw r Tune-up Meas Pw r Tune-up (Yes/No) (Yes/No) 1 2412 15.9 16.5 16.3 16.5 2 2417 18.1 18.5 18.2 18.5 6 2437 18.1 18.5 18.5 18.5 DSSS 9 2452 18.1 18.5 18.4 18.5 802.11b Yes Yes 2.4 GHz 10 2457 Not Required 18.5 Not Required 18.5 11 2462 Not Required 15.0 Not Required 15.0 12 2467 Not Required 14.5 Not Required 14.5 13 2472 Not Required 13.5 Not Required 13.5 1 2412 16.5 16.5 2 2417 18.5 18.5 6 2437 18.5 18.5 9 2452 18.5 18.5 802.11g No No 10 2457 18.5 18.5 11 2462 15.0 15.0 12 2467 14.5 14.5 13 2472 13.5 13.5 1 2412 16.5 16.5 2 2417 18.5 18.5 OFDM 6 2437 18.5 18.5 2.4 GHz 802.11n 9 2452 18.5 18.5 No No (HT20) 10 2457 18.5 18.5 11 2462 15.0 15.0 12 2467 14.5 14.5 13 2472 13.5 13.5 3 2422 18.5 18.5 6 2437 18.5 18.5 802.11n 9 2452 18.5 No 18.5 No (HT40) 10 2457 18.5 18.5 11 2462 15.0 15.0 Note(s): SAR is not required for channel 12 and 13 because the tune-up limit and the measured output power for these two channels are not greater than those for the default test channels. Refer to KDB 248227 D01 section 3.1 Page 15 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.:12857633 -S1V3 Issue Date: 9/24/2019 9.2. Wi-Fi 5GHz (U-NII Bands) Maximum Output Power (Tune-up Limit) for Wi-Fi 5 GHz When the same transmission mode configurations have the same maximum output power on the same channel for the 802.11 a/n/ac modes, the channel in the lower order/sequence 802.11 transmission mode is selected. The maximum output power specified for production units are determined for all applicable 802.11 transmission modes in each standalone and aggregated frequency band. Maximum output power is measured for the highest maximum output power configuration(s) in each frequency band according to the default power measurement procedures. For “Not required”, SAR Test reduction was applied from KDB 248227 guidance, Sec. 2.1, b), 1) when the same maximum power is specified for multiple transmission modes in a frequency band, the largest channel bandwidth, lowest order modulation, lowest data rate and lowest order 802.11a/g/n/ac/ax mode is used for SAR measurement, on the highest measured output power channel in the initial test configuration, for each frequency band. Additional output power measurements were not deemed necessary. When the specified maximum output power is the same for both UNII 1 and UNII 2A, begin SAR measurements in UNII 2A with the channel with the highest measured output power. If the reported SAR for UNII 2A is ≤ 1.2 W/kg, SAR is not required for UNII 1; otherwise treat the remaining bands separately and test them independently for SAR. Page 16 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.:12857633 -S1V3 Issue Date: 9/24/2019 Wi-Fi 5 GHz Measured Results ANT 1 Average Pow er (dBm ) ANT 2 Average Pow er (dBm ) Freq. Band Mode Ch # SAR Test SAR Test (MHz) Meas Pw r Tune-up Meas Pw r Tune-up (Yes/No) (Yes/No) 36 5180 9.5 9.5 40 5200 9.5 9.5 802.11a No No 44 5220 9.5 9.5 48 5240 9.5 9.5 36 5180 10.0 10.0 802.11n 40 5200 10.0 10.0 No No (HT20) 44 5220 10.0 10.0 48 5240 10.0 10.0 UNII-1 36 5180 10.0 10.0 5.2 GHz 40 5200 10.0 10.0 802.11ac No No (VHT20) 44 5220 10.0 10.0 48 5240 10.0 10.0 802.11n 38 5190 11.5 11.5 No No (HT40) 46 5230 11.5 11.5 802.11ac 38 5190 11.5 11.5 No No (VHT40) 46 5230 11.5 11.5 802.11ac 42 5210 11.5 No 11.5 No (VHT80) ANT 1 Average Pow er (dBm ) ANT 2 Average Pow er (dBm ) Freq. Band Mode Ch # SAR Test SAR Test (MHz) Meas Pw r Tune-up Meas Pw r Tune-up (Yes/No) (Yes/No) 52 5260 14.0 14.0 56 5280 14.0 14.0 802.11a No No 60 5300 14.0 14.0 64 5320 14.0 14.0 52 5260 14.0 14.0 802.11n 56 5280 14.0 14.0 No No (HT20) 60 5300 14.0 14.0 64 5320 14.0 14.0 UNII-2A 52 5260 14.0 14.0 5.3 GHz 56 5280 14.0 14.0 802.11ac No No (VHT20) 60 5300 14.0 14.0 64 5320 14.0 14.0 802.11n 54 5270 16.2 16.5 16.3 16.5 Yes Yes (HT40) 62 5310 16.3 16.5 16.4 16.5 802.11ac 54 5270 16.5 16.5 No No (VHT40) 62 5310 16.5 16.5 802.11ac 58 5290 14.5 No 14.5 No (VHT80) Page 17 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.:12857633 -S1V3 Issue Date: 9/24/2019 Wi-Fi 5 GHz Measured Results (continued) ANT 1 Average Power (dBm) ANT 2 Average Power (dBm) Freq. Band Mode Ch # SAR Test SAR Test (MHz) Meas Pwr Tune-up Meas Pwr Tune-up (Yes/No) (Yes/No) 104 5500 15.0 15.0 116 5580 15.0 15.0 802.11a No No 140 5700 15.0 15.0 144 5720 15.0 15.0 104 5500 15.0 15.0 802.11n 116 5580 15.0 15.0 No No (HT20) 140 5700 15.0 15.0 144 5720 15.0 15.0 104 5500 15.0 15.0 802.11ac 116 5580 15.0 15.0 No No (VHT20) 140 5700 15.0 15.0 UNII-2C 144 5720 15.0 15.0 5.5 GHz 102 5510 15.5 15.5 802.11n 110 5550 15.5 15.5 No No (HT40) 134 5670 15.5 15.5 142 5710 16.5 16.5 102 5510 15.5 15.5 802.11ac 110 5550 15.5 15.5 No No (VHT40) 134 5670 15.5 15.5 142 5710 16.5 16.5 106 5530 13.5 13.5 802.11ac 122 5610 13.5 Yes 13.5 Yes (VHT80) 138 5690 16.5 16.5 16.5 16.5 ANT 1 Average Power (dBm) ANT 2 Average Power (dBm) Freq. Band Mode Ch # SAR Test SAR Test (MHz) Meas Pwr Tune-up Meas Pwr Tune-up (Yes/No) (Yes/No) 149 5745 16.5 16.5 802.11a 157 5785 16.5 No 16.5 No 165 5825 16.5 16.5 149 5745 16.5 16.5 802.11n 157 5785 16.5 No 16.5 No (HT20) 165 5825 16.5 16.5 149 5745 16.5 16.5 UNII-3 802.11ac 5.8 GHz 157 5785 16.5 No 16.5 No (VHT20) 165 5825 16.5 16.5 802.11n 151 5755 16.5 16.5 No No (HT40) 159 5795 16.5 16.5 802.11ac 151 5755 16.5 16.5 No No (VHT40) 159 5795 16.5 16.5 802.11ac 155 5775 16.4 16.5 Yes 16.4 16.5 Yes (VHT80) Page 18 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.:12857633 -S1V3 Issue Date: 9/24/2019 10. Measured and Reported (Scaled) SAR Results SAR Test Reduction criteria are as follows: • Reported SAR(W/kg) for Wi-Fi = Measured SAR * Tune-up scaling factor * Duty Cycle scaling factor • Duty Cycle scaling factor = 1 / Duty cycle (%) KDB 447498 D01 General RF Exposure Guidance: Testing of other required channels within the operating mode of a frequency band is not required when the reported 1-g or 10-g SAR for the mid-band or highest output power channel is: • ≤ 0.8 W/kg or 2.0 W/kg, for 1-g or 10-g respectively, when the transmission band is ≤ 100 MHz • ≤ 0.6 W/kg or 1.5 W/kg, for 1-g or 10-g respectively, when the transmission band is between 100 MHz and 200 MHz • ≤ 0.4 W/kg or 1.0 W/kg, for 1-g or 10-g respectively, when the transmission band is ≥ 200 MHz KDB 248227 D01 SAR meas for 802.11: SAR test reduction for 802.11 Wi-Fi transmission mode configurations are considered separately for DSSS and OFDM. An initial test position is determined to reduce the number of tests required for certain exposure configurations with multiple test positions. An initial test configuration is determined for each frequency band and aggregated band according to maximum output power, channel bandwidth, wireless mode configurations and other operating parameters to streamline the measurement requirements. For 2.4 GHz DSSS, either the initial test position or DSSS procedure is applied to reduce the number of SAR tests; these are mutually exclusive. For OFDM, an initial test position is only applicable to next to the ear, UMPC mini-tablet and hotspot mode configurations, which is tested using the initial test configuration to facilitate test reduction. For other exposure conditions with a fixed test position, SAR test reduction is determined using only the initial test configuration. The multiple test positions require SAR measurements in head, hotspot mode or UMPC mini-tablet configurations may be reduced according to the highest reported SAR determined using the initial test position(s) by applying the DSSS or OFDM SAR measurement procedures in the required wireless mode test configuration(s). The initial test position(s) is measured using the highest measured maximum output power channel in the required wireless mode test configuration(s). When the reported SAR for the initial test position is: • ≤ 0.4 W/kg, further SAR measurement is not required for the other test positions in that exposure configuration and wireless mode combination within the frequency band or aggregated band. DSSS and OFDM configurations are considered separately according to the required SAR procedures. • > 0.4 W/kg, SAR is repeated using the same wireless mode test configuration tested in the initial test position to measure the subsequent next closet/smallest test separation distance and maximum coupling test position, on the highest maximum output power channel, until the reported SAR is ≤ 0.8 W/kg or all required test positions are tested. o For subsequent test positions with equivalent test separation distance or when exposure is dominated by coupling conditions, the position for maximum coupling condition should be tested. o When it is unclear, all equivalent conditions must be tested. • For all positions/configurations tested using the initial test position and subsequent test positions, when the reported SAR is > 0.8 W/kg, measure the SAR for these positions/configurations on the subsequent next highest measured output power channel(s) until the reported SAR is ≤ 1.2 W/kg or all required test channels are considered. o The additional power measurements required for this step should be limited to those necessary for identifying subsequent highest output power channels to apply the test reduction. • When the specified maximum output power is the same for both UNII 1 and UNII 2A, begin SAR measurements in UNII 2A with the channel with the highest measured output power. If the reported SAR for UNII 2A is ≤ 1.2 W/kg, SAR is not required for UNII 1; otherwise treat the remaining bands separately and test them independently for SAR. • When the specified maximum output power is different between UNII 1 and UNII 2A, begin SAR with the band that has the higher specified maximum output. If the highest reported SAR for the band with the highest specified power is ≤ 1.2 W/kg, testing for the band with the lower specified output power is not required; otherwise test the remaining bands independently for SAR. Page 19 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.:12857633 -S1V3 Issue Date: 9/24/2019 10.1. Wi-Fi (DTS Band) Pow er (dBm) 1-g SAR (W/kg) RF Exposure Dist. Test Freq. Plot Mode Ch #. Duty Cycle Antenna Tune-up Conditions (mm) Position (MHz) Meas. Meas. Scaled No. Limit ANT 1 18.5 18.1 0.367 0.411 802.11b Standalone 0 Rear 6 2437 99.03% 1 1 Mbps ANT 2 18.5 18.5 0.336 0.342 10.2. Wi-Fi (U-NII Band) Pow er (dBm) 1-g SAR (W/kg) RF Exposure Dist. Test Freq. Plot Mode Ch #. Duty Cycle Antenna Tune-up Conditions (mm) Position (MHz) Meas. Meas. Scaled No. Limit ANT 1 16.5 16.3 0.536 0.627 802.11n Standalone 0 Rear 62 5310 90.37% 2 HT40 ANT 2 16.5 16.4 0.394 0.448 Pow er (dBm) 1-g SAR (W/kg) RF Exposure Dist. Test Freq. Plot Mode Ch #. Duty Cycle Antenna Tune-up Conditions (mm) Position (MHz) Meas. Meas. Scaled No. Limit ANT 1 16.5 16.5 0.440 0.532 802.11ac Standalone 0 Rear 138 5690 82.72% 3 VHT80 ANT 2 16.5 16.5 0.367 0.444 Pow er (dBm) 1-g SAR (W/kg) RF Exposure Dist. Test Freq. Plot Mode Ch #. Duty Cycle Antenna Tune-up Conditions (mm) Position (MHz) Meas. Meas. Scaled No. Limit ANT 1 16.5 16.4 0.272 0.339 802.11ac Standalone 0 Rear 155 5775 82.72% 4 VHT80 ANT 2 16.5 16.4 0.197 0.245 Page 20 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.:12857633 -S1V3 Issue Date: 9/24/2019 10.3. Standalone SAR Test Exclusion Considerations & Estimated SAR The 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW) / (min. test separation distance, mm)]·[√f(GHz)] ≤ 3.0, for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, where • f(GHz) is the RF channel transmit frequency in GHz • Power and distance are rounded to the nearest mW and mm before calculation • The result is rounded to one decimal place for comparison The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. When the standalone SAR test exclusion is applied to an antenna that transmits simultaneously with other antennas, the standalone SAR must be estimated according to following to determine simultaneous transmission SAR test exclusion: • (max. power of channel, including tune-up tolerance, mW) / (min. test separation distance, mm)]·[√f(GHz)/x] W/kg for test separation distances ≤ 50 mm; where x = 7.5 for 1-g SAR, and x = 18.75 for 10-g SAR. • 0.4 W/kg for 1-g SAR and 1.0 W/kg for 10-g SAR, when the test separation distances is > 50 mm. Max. tune-up tolerance Min. test SAR test Estimated RF Air RF Exposure Frequency Pow er separation exclusion 1-g SAR interface Conditions (GHz) (dBm) (mW) distance (mm) Result* (W/kg) Bluetooth Standalone 2.480 6.0 4 5 1.3 0.168 Conclusion: *: The computed value is ≤ 3; therefore, this qualifies for Standalone SAR test exclusion. Page 21 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.:12857633 -S1V3 Issue Date: 9/24/2019 11. SAR Measurement Variability In accordance with published RF Exposure KDB 865664 D01 SAR measurement 100 MHz to 6 GHz. These additional measurements are repeated after the completion of all measurements requiring the same head or body tissue-equivalent medium in a frequency band. The test device should be returned to ambient conditions (normal room temperature) with the battery fully charged before it is re-mounted on the device holder for the repeated measurement(s) to minimize any unexpected variations in the repeated results. 1) Repeated measurement is not required when the original highest measured SAR is <0.8 or 2 W/kg (1-g or 10-g respectively); steps 2) through 4) do not apply. 2) When the original highest measured SAR is ≥ 0.8 or 2 W/kg (1-g or 10-g respectively), repeat that measurement once. 3) Perform a second repeated measurement only if the ratio of largest to smallest SAR for the original and first repeated measurements is > 1.20 or when the original or repeated measurement is ≥ 1.45 or 3.6 W/kg (~ 10% from the 1-g or 10-g respective SAR limit). 4) Perform a third repeated measurement only if the original, first, or second repeated measurement is ≥ 1.5 or 3.75 W/kg (1-g or 10-g respectively) and the ratio of largest to smallest SAR for the original, first and second repeated measurements is > 1.20. Note(s): Repeated measurement is not required since the original highest measured SAR is <0.8 W/kg (1-g). Page 22 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.:12857633 -S1V3 Issue Date: 9/24/2019 12. Simultaneous Transmission SAR Analysis Simultaneous Transmission Condition Capable Transmit Configurations RF Exposure Condition Item ANT 1 ANT 2 1 DTS + DTS Standalone 2 U-NII + U-NII 3 BT & U-NII + U-NII Notes: 1. Bluetooth Radio is only supported on ANT 1. 2.  DTS Radio cannot transmit simultaneously w ith Bluetooth Radio on ANT1. 3.  U-NII Radio can transmit simultaneously w ith Bluetooth Radio. 12.1. Sum of the SAR for Wi-Fi & BT Standalone SAR (W/kg) ∑ 1-g SAR (W/kg) RF Test DTS U-NII Exposure BT DTS + DTS U-NII + U-NII U-NII + BT Position Conditions ANT 1 ANT 2 ANT 1 ANT 2 ANT 1 ① +② ③ +④ ③ +④ +⑤ ① ② ③ ④ ⑤ Standalone Rear 0.411 0.342 0.627 0.448 0.168 0.753 1.075 1.243 Page 23 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.:12857633 -S1V3 Issue Date: 9/24/2019 Figure (1) Appendixes Refer to separated files for the following appendixes. Appendix A: SAR Setup Photos Appendix B: SAR System Check Plots Appendix C: SAR Highest Test Plots Appendix D: SAR Tissue Ingredients Appendix E: SAR Probe Certificates Appendix F: SAR Dipole Certificates END OF REPORT Page 24 of 24 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.


Document Created: 2019-10-03 01:53:59
Document Modified: 2019-10-03 01:53:59
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