12935947-S1V2 FCC Report_SAR

FCC ID: C3K1872

RF Exposure Info

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FCCID_4444461

SAR EVALUATION REPORT IEEE Std 1528-2013 For Portable Computing Device FCC ID: C3K1872 Model Name: 1872 Report Number: 12935947-S1V2 Issue Date: 9/9/2019 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.:12935947 -S1V2 Issue Date: 9/9/2019 Revision History Rev. Date Revisions Revised By V1 9/6/2019 Initial Issue -- V2 9/9/2019 Updated per TCB feedback Coltyce Sanders Page 2 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 Table of Contents 1. Attestation of Test Results ......................................................................................................... 5 2. Test Specification, Methods and Procedures............................................................................ 6 3. Facilities and Accreditation ........................................................................................................ 6 4. SAR Measurement System & Test Equipment .......................................................................... 7 4.1. SAR Measurement System ........................................................................................................ 7 4.2. SAR Scan Procedures ............................................................................................................... 8 4.3. Test Equipment........................................................................................................................ 10 5. Measurement Uncertainty ......................................................................................................... 10 6. Device Under Test (DUT) Information ...................................................................................... 11 6.1. DUT Description ...................................................................................................................... 11 6.2. Wireless Technologies ............................................................................................................. 11 7. RF Exposure Conditions (Test Configurations) ...................................................................... 12 8. Dielectric Property Measurements & System Check .............................................................. 13 8.1. Dielectric Property Measurements ........................................................................................... 13 8.2. System Check.......................................................................................................................... 15 9. Conducted Output Power Measurements................................................................................ 17 9.1. Wi-Fi 2.4GHz (DTS Band)........................................................................................................ 17 9.2. Wi-Fi 5GHz (U-NII Bands)........................................................................................................ 20 10. Measured and Reported (Scaled) SAR Results ....................................................................... 25 10.1. Wi-Fi (DTS Band) ................................................................................................................. 26 10.2. Wi-Fi (U-NII Band) ................................................................................................................ 26 10.3. Standalone SAR Test Exclusion Considerations & Estimated SAR ...................................... 27 11. SAR Measurement Variability ................................................................................................... 27 12. Simultaneous Transmission SAR Analysis ............................................................................. 28 12.1. Sum of the SAR for Wi-Fi & BT ............................................................................................ 28 Appendixes .......................................................................................................................................... 29 Appendix A: SAR Setup Photos ......................................................................................................... 29 Appendix B: SAR System Check Plots ............................................................................................... 29 Appendix C: SAR Highest Test Plots .................................................................................................. 29 Appendix D: SAR Tissue Ingredients.................................................................................................. 29 Appendix E: SAR Probe Certificates................................................................................................... 29 Appendix F: SAR Dipole Certificates .................................................................................................. 29 Page 3 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 Page 4 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 1. Attestation of Test Results Applicant Name MICROSOFT CORPORATION FCC ID C3K1872 Model Name 1872 Exposure Category General Population/Uncontrolled Exposure Published RF exposure KDB procedures Applicable Standards IEEE Std 1528-2013 SAR Limits (W/Kg) Exposure Category Peak spatial-average Extremities (hands, wrists, ankles, etc.) (1g of tissue) (10g of tissue) General population / 1.6 4 Uncontrolled exposure Equipment Class - Highest Reported SAR (W/kg) RF Exposure Conditions PCB DTS NII DSS Standalone 0.923 0.918 N/A N/A Simultaneous TX 1.461 1.578 1.578 Date Tested 8/26/2019 to 8/29/2019 Test Results Pass UL Verification Services Inc. tested the above equipment in 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: Dave Weaver Remi Rodberg Operations Leader Laboratory Technician UL Verification Services Inc. UL Verification Services Inc. Page 5 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 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 6 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 4. SAR Measurement System & Test Equipment 4.1. SAR Measurement System The DASY5 system used for performing compliance tests consists of the following items: • A standard high precision 6-axis robot with controller, teach pendant and software. An arm extension for accommodating the data acquisition electronics (DAE). • An isotropic Field probe optimized and calibrated for the targeted measurement. • A data acquisition electronics (DAE) which performs the signal amplification, signal multiplexing, AD- conversion, offset measurements, mechanical surface detection, collision detection, etc. The unit is battery powered with standard or rechargeable batteries. The signal is optically transmitted to the EOC. • The Electro-optical converter (EOC) performs the conversion from optical to electrical signals for the digital communication to the DAE. To use optical surface detection, a special version of the EOC is required. The EOC signal is transmitted to the measurement server. • The function of the measurement server is to perform the time critical tasks such as signal filtering, control of the robot operation and fast movement interrupts. • The Light Beam used is for probe alignment. This improves the (absolute) accuracy of the probe positioning. • A computer running WinXP or Win7 and the DASY5 software. • Remote control and teach pendant as well as additional circuitry for robot safety such as warning lamps, etc. • The phantom, the device holder and other accessories according to the targeted measurement. Page 7 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 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 8 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 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 9 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 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 Thermometer Keysight Traceable 170064398 5/21/2020 System Check Name of Equipment Manufacturer Type/Model Serial No. Cal. Due Date Synthesized Signal Generator Agilent N5181A MY50140610 1/31/2020 Power Meter Keysight N1912A MY55196007 1/30/2020 Power Sensor Agilent N1921A MY53260001 2/5/2020 Power Sensor Agilent N1921A MY52200012 2/6/2020 Amplifier MITEQ AMF-4D-00400600-50-30P 1795092 N/A Directional coupler Werlatone C8060-102 2149 N/A DC Power Supply Sorensen XT 15-4 1817A02680 N/A 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 1003 2/19/2020 System Validation Dipole SPEAG D5GHzV2 1168 11/30/2019 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 10 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 6. Device Under Test (DUT) Information 6.1. DUT Description Device Dimension See Appendix A Back Cover The Back Cover is not removable Battery Options The battery is not user accessible. Accessory N/A S/N IMEI Notes Test sample information 12475292957 N/A WLAN Radiated/Conducted 14813492757 N/A WLAN Radiated/Conducted Hardware Version DV Software Version MTEOS 1.652.0 6.2. Wireless Technologies Wireless Duty Cycle used for SAR Frequency bands Operating mode technologies testing 802.11b 802.11g 2.4 GHz 802.11n (HT20) 99.26% (802.11b) 1 802.11n (HT40) 802.11ax (HE40) 802.11a 802.11n (HT20) 802.11n (HT40) 802.11ac (VHT20) Wi-Fi 802.11ac (VHT40) 98.95% (802.11n HT40) 1 5 GHz 802.11ac (VHT80) 98.95% (802.11ac VHT80MHz BW) 1 802.11ac (VHT160) 98.66% (802.11ax 80MHz BW) 802.11ax (HE20) 802.11ax (HE40) 802.11ax (HE80) 802.11ax (HE160) 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 sections 9.1 (DTS) and 9.2 (U-NII). 2. Measured Duty Cycle is not required due to SAR test exemption Page 11 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 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 Chain 0 WLAN Standalone 0 mm Rear N/A Yes Chain 1 Page 12 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 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) er s (S/m) er s (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 13 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 Dielectric Property Measurements Results: Relative Permittivity (єr) Conductivity (σ) SAR Band Tissue Frequency Date Delta Delta Lab (MHz) Type (MHz) Measured Target Measured Target (%) (%) 2450 50.26 52.70 -4.63 2.03 1.95 4.26 1 8/26/2019 2450 Body 2400 50.31 52.77 -4.67 1.99 1.90 4.64 2480 50.26 52.66 -4.56 2.05 1.99 2.90 5250 48.30 48.95 -1.33 5.33 5.35 -0.35 3 8/26/2019 5250 Body 5150 48.49 49.09 -1.22 5.19 5.24 -0.91 5350 48.09 48.82 -1.49 5.48 5.47 0.12 5600 47.60 48.48 -1.81 5.85 5.76 1.46 3 8/26/2019 5600 Body 5500 47.79 48.61 -1.69 5.69 5.64 0.86 5725 47.36 48.31 -1.96 6.03 5.91 2.02 5750 47.30 48.27 -2.04 6.07 5.94 2.18 3 8/26/2019 5750 Body 5700 47.41 48.34 -1.93 5.99 5.88 1.96 5850 47.10 48.20 -2.28 6.22 6.00 3.58 Page 14 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 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. Page 15 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 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 8/26/2019 Body D2450V2 SN:899 3/22/2020 5.350 53.50 50.00 7.00 2.460 24.60 23.50 4.68 1,2 3 8/26/2019 Body D5GHzV2 SN:1003 (5.25 GHz) 2/19/2020 7.350 73.50 74.40 -1.21 2.090 20.90 20.80 0.48 3,4 3 8/26/2019 Body D5GHzV2 SN:1003 (5.60 GHz) 2/19/2020 8.600 86.00 79.30 8.45 2.420 24.20 22.30 8.52 5,6 3 8/26/2019 Body D5GHzV2 SN:1003 (5.75 GHz) 2/19/2020 8.270 82.70 76.20 8.53 2.310 23.10 21.40 7.94 7,8 Page 16 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 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. Page 17 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 Wi-Fi 2.4GHz Measured Results Chain 0 Average Pow er (dBm ) Chain 1 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 19.1 20.0 19.4 20.0 6 2437 19.0 20.0 19.4 20.0 DSSS 802.11b 11 2462 19.1 20.0 Yes 19.2 20.0 Yes 2.4 GHz 12 2467 Not Required 20.0 Not Required 20.0 13 2472 Not Required 19.0 Not Required 19.0 1 2412 19.5 19.5 2 2417 20.0 20.0 6 2437 20.0 20.0 802.11g 10 2457 20.0 No 20.0 No 11 2462 18.5 18.5 12 2467 15.5 15.5 13 2472 13.0 13.0 1 2412 17.5 17.5 2 2417 20.0 20.0 OFDM 6 2437 20.0 20.0 2.4 GHz 802.11n 9 2452 20.0 20.0 No No (HT20) 10 2457 19.5 19.5 11 2462 16.5 16.5 12 2467 14.5 14.5 13 2472 11.0 11.0 3 2422 17.0 17.0 5 2432 18.0 18.0 802.11n 6 2437 18.0 No 18.0 No (HT40) 7 2442 17.5 17.5 11 2462 15.0 15.0 1 2412 16.0 16.0 2 2417 19.5 19.5 3 2422 20.0 20.0 6 2437 20.0 20.0 802.11ax 9 2452 20.0 No 20.0 No (HE20) 10 2457 18.5 18.5 OFDMA 11 2462 14.5 14.5 2.4 GHz 12 2467 13.5 13.5 13 2472 12.5 12.5 3 2422 15.5 15.5 5 2432 17.5 17.5 802.11ax 6 2437 18.5 18.5 No (HE40) No 8 2447 17.0 17.0 11 2462 11.5 11.5 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 18 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 Duty Factor Measured Results: T on Period Crest Factor Band Antenna Mode Data Rate Duty Cycle (ms) (ms) (1/duty cycle) Chain 0 8.346 8.408 99.26% 1.01 2.4G 802.11b 1 Mbps Chain 1 8.346 8.408 99.26% 1.01 Note(s): Duty Cycle = (T on / period) * 100% Duty Cycle plots 802.11b Chain 0 Chain 1 Page 19 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 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/g/n/ac/ax 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 20 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 Wi-Fi 5 GHz Measured Results Chain 0 Average Power (dBm) Chain 1 Average Power (dBm) Freq. Band Mode Ch # SAR Test SAR Test (MHz) Meas Pwr Tune-up Meas Pwr Tune-up (Yes/No) (Yes/No) 36 5180 11.5 11.5 40 5200 11.5 11.5 802.11a No No 44 5220 11.5 11.5 48 5240 11.5 11.5 36 5180 14.5 14.5 802.11n 40 5200 14.5 14.5 No No (HT20) 44 5220 14.5 14.5 48 5240 14.5 14.5 36 5180 15.0 15.0 UNII-1 802.11ax 40 5200 15.0 15.0 5.2 GHz No No (HE20) 44 5220 15.0 15.0 48 5240 15.0 15.0 802.11n 38 5190 16.5 16.5 No No (HT40) 46 5230 16.5 16.5 802.11ax 38 5190 16.5 16.5 No No (HE40) 46 5230 16.5 16.5 802.11ac 42 5210 14.9 16.5 Yes 14.8 16.5 Yes (VHT80) 802.11ax 42 5210 16.5 No 16.5 No (HE80) Chain 0 Average Power (dBm) Chain 1 Average Power (dBm) Freq. Band Mode Ch # SAR Test SAR Test (MHz) Meas Pwr Tune-up Meas Pwr Tune-up (Yes/No) (Yes/No) 52 5260 16.5 16.5 56 5280 16.5 16.5 802.11a No No 60 5300 16.5 16.5 64 5320 16.5 16.5 52 5260 20.0 20.0 802.11n 56 5280 20.0 20.0 No No (HT20) 60 5300 20.0 20.0 64 5320 19.0 19.0 52 5260 20.0 20.0 UNII-2A 802.11ax 56 5280 20.0 20.0 5.3 GHz No No (HE20) 60 5300 20.0 20.0 64 5320 20.0 20.0 802.11n 54 5270 19.3 20.0 18.9 20.0 Yes Yes (HT40) 62 5310 Not Required 17.0 Not Required 17.0 802.11ax 54 5270 17.5 17.5 No No (HE40) 62 5310 17.5 17.5 802.11ac 58 5290 16.0 No 16.0 No (VHT80) 802.11ax 58 5290 17.5 No 17.5 No (HE80) 802.11ac 50 5250 15.5 No 15.5 No (VHT160) UNII-1 & 2A 802.11ax 50 5250 15.5 No 15.5 No (HE160) Page 21 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 Wi-Fi 5 GHz Measured Results (Continued) Chain 0 Average Pow er (dBm ) Chain 1 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) 100 5500 16.0 16.0 116 5580 16.0 16.0 802.11a No No 124 5620 16.0 16.0 144 5720 16.0 16.0 100 5500 20.0 20.0 802.11n 116 5580 20.0 20.0 No No (HT20) 124 5620 20.0 20.0 144 5720 19.5 19.5 108 5540 20.0 20.0 802.11ax 116 5580 20.0 20.0 No No (HE20) 124 5620 20.0 20.0 132 5660 20.0 20.0 UNII-2C 102 5510 17.5 17.5 5.6 GHz 802.11n 118 5590 20.0 20.0 No No (HT40) 126 5630 20.0 20.0 142 5710 20.0 20.0 102 5510 17.5 17.5 802.11ax 118 5590 19.0 19.0 No No (HE40) 126 5630 19.0 19.0 142 5710 20.0 20.0 106 5530 Not Required 17.0 Not Required 17.0 802.11ac 122 5610 18.4 20.0 Yes 18.4 20.0 Yes (VHT80) 138 5690 18.4 20.0 18.4 20.0 106 5530 Not Required 18.0 Not Required 18.0 802.11ax 122 5610 18.5 20.0 No 18.3 20.0 No (HE80) 138 5690 18.5 20.0 18.4 20.0 802.11ac 114 5570 14.5 No 14.5 No UNII-2C (VHT160) 5.6 GHz 802.11ax 114 5570 10.5 No 10.5 No (HE160) Chain 0 Average Pow er (dBm ) Chain 1 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) 149 5745 20.0 20.0 802.11a 157 5785 20.0 No 20.0 No 165 5825 20.0 20.0 149 5745 20.0 20.0 802.11n 157 5785 20.0 No 20.0 No (HT20) 165 5825 20.0 20.0 149 5745 20.0 20.0 802.11ax UNII-3 157 5785 20.0 No 20.0 No (HE20) 5.8 GHz 165 5825 20.0 20.0 802.11n 151 5755 20.0 20.0 No No (HT40) 159 5795 20.0 20.0 802.11ax 151 5755 19.0 19.0 No No (HE40) 159 5795 19.5 19.5 802.11ac 155 5775 19.5 No 19.5 No (VHT80) 802.11ax 155 5775 18.5 20.0 Yes 18.5 20.0 Yes (HE80) Page 22 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 Duty Factor Measured Results: T on Period Crest Factor Band Antenna Mode Data Rate Duty Cycle (ms) (ms) (1/duty cycle) 5.3G MIMO 802.11n HT40 MCS0 3.973 4.015 98.95% 1.01 5.6G MIMO 802.11ac VHT80 MCS0 3.973 4.015 98.95% 1.01 5.8G MIMO 802.11ax HE80 MCS0 3.976 4.030 98.66% 1.01 Duty Cycle plot for 802.11n HT40 MIMO Duty Cycle plot for 802.11ac VHT80 MIMO Page 23 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 Duty Cycle plot for 802.11ax HE80 MIMO Page 24 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 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 25 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 10.1. Wi-Fi (DTS Band) Pow er (dBm) 1-g SAR (W/kg) RF Exposure Dist. Test Freq. Plot Mode Antenna Ch #. Duty Cycle Tune-up Conditions (mm) Position (MHz) Meas. Meas. Scaled No. Limit 802.11b 1 2412 99.26% 20.0 19.10 0.745 0.923 1 Standalone Chain 0 0 Rear 1 Mbps 11 2462 99.26% 20.0 19.07 0.553 0.690 802.11b Standalone Chain 1 0 Rear 6 2437 99.26% 20.0 19.38 0.463 0.538 2 1 Mbps 10.2. Wi-Fi (U-NII Band) Pow er (dBm) 1-g SAR (W/kg) RF Exposure Dist. Test Freq. Plot Mode Antenna Ch #. Duty Cycle Conditions (mm) Position (MHz) Tune-up Limit Meas. Meas. Scaled No. 802.11n Standalone Chain 0 0 Rear 54 5270 98.95% 20.0 19.3 0.295 0.350 3 HT40 802.11n Standalone Chain 1 0 Rear 54 5270 98.95% 20.0 18.9 0.511 0.665 4 HT40 Pow er (dBm) 1-g SAR (W/kg) RF Exposure Dist. Test Freq. Plot Mode Antenna Ch #. Duty Cycle Tune-up Conditions (mm) Position (MHz) Meas. Meas. Scaled No. Limit 802.11ac Standalone Chain 0 0 Rear 122 5610 98.95% 20.0 18.4 0.289 0.422 5 VHT80 802.11ac Standalone Chain 1 0 Rear 122 5610 98.95% 20.0 18.4 0.535 0.782 6 VHT80 Pow er (dBm) 1-g SAR (W/kg) RF Exposure Dist. Test Freq. Plot Mode Antenna Ch #. Duty Cycle Tune-up Conditions (mm) Position (MHz) Meas. Meas. Scaled No. Limit 802.11ax Standalone Chain 0 0 Rear 155 5775 98.66% 20.0 18.5 0.579 0.829 7 HE80 802.11ax Standalone Chain 1 0 Rear 155 5775 98.66% 20.0 18.5 0.641 0.918 8 HE80 Page 26 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 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 Body-w orn 2.480 3.5 2 5 0.6 0.084 Conclusion: *: The computed value is ≤ 3; therefore, Bluetooth qualifies for Standalone SAR test exclusion. 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. Conclusion: Repeated measurement is not required since the original highest measured SAR is <0.8 W/kg. Page 27 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 12. Simultaneous Transmission SAR Analysis Simultaneous Transmission Condition: Capable Transmit Configurations RF Exposure Condition Item Chain 0 Chain 1 1 DTS + DTS Standalone 2 U-NII + U-NII 3 U-NII & BT + U-NII Notes: 1. Bluetooth Radio is only supported on Chain 0. 2. DTS Radio cannot transmit simultaneously w ith Bluetooth Radio 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 Exposure Test 1 2 3 4 5 Conditions Position 1+2 3+4 3+4+5 Wi-Fi 2.4G Wi-Fi 2.4G Wi-Fi 5G Wi-Fi 5G BT Chain# 0 Chain# 1 Chain# 0 Chain# 1 Chain# 0 0.923 0.538 0.829 0.918 0.084 1.461 1.747 1.831 Standalone Rear 0.829 0.665 0.084 1.494 1.578 Note(s): Worst Case Sum of SAR for 5GHz and BT was >1.6 W/kg, therefore additional sum of SAR cases were evaluated in order to find the worst case sum of SAR < 1.6 W/kg for Highest Reported SAR purposes. Worst Case SAR to Peak Location Separation Ratio (SPLSR): Standalone SAR (W/kg) Calculated Volume RF Exposure 3 4 5 ∑ 1-g SAR SPLSR Test Position distance Scan Conditions (W/kg) (≤ 0.04) Wi-Fi 5G Wi-Fi 5G BT (mm) (Yes/ No) Chain# 0 Chain# 1 Chain# 0 0.829 0.918 0.084 3+4+5 1.831 151.4 0.02 No Standalone Rear 0.829 0.918 3+4 1.747 163.0 0.01 No 0.918 0.084 4+5 1.002 151.4 0.01 No RF Exposure Peak SAR X Y Z Test Position Mode d: Calculated distance (mm) Conditions W/kg m m m 5G Chain# 0 3 1.360 0.110 0.068 -0.174 Standalone Rear 3+4 163.0 5G Chain# 1 4 1.530 0.112 -0.095 -0.174 5G Chain# 1 4 1.530 0.112 -0.095 -0.174 Standalone Rear 4+5 151.4 2.4G Chain# 0 5 1.260 0.113 0.056 -0.177 BT SAR is estimated, therefore the shortest distance between Chain 0 feed point and Chain 1 is being used to determine SPLSR exclusion for BT The Peak Location Separation Distance is computed by using the formula: SQRT((X1-X2)^2+(Y1-Y2)^2+(Z1-Z2)^2) Conclusion: 1. Worst case SPLSR analysis was < 0.04, therefore additional cases was not evaluated. 2. Simultaneous transmission SAR measurement (Volume Scan) is not required because the SPLSR is ≤ 0.04. Page 28 of 29 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.:12935947 -S1V2 Issue Date: 9/9/2019 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 29 of 29 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: 2019-09-09 19:45:44
Document Modified: 2019-09-09 19:45:44
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