RFExpPower Density

FCC ID: NM82Q6U100

RF Exposure Info

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FCCID_4227850

RF EXPOSURE EVALUATION REPORT Report No. : FA8D2018B RF EXPOSURE EVALUATION REPORT FCC ID : NM82Q6U100 Equipment : Smart Hub Model Name : 2Q6U100 Applicant : HTC Corporation No.88, Sec. 3, Zhongxing Rd., Xindian Dist., New Taipei City 231, Taiwan (R.O.C.) Manufacturer : HTC Corporation No.88, Sec. 3, Zhongxing Rd., Xindian Dist., New Taipei City 231, Taiwan (R.O.C.) Standard : FCC 47 CFR Part 2 (2.1093) We, SPORTON INTERNATIONAL INC have been evaluated in accordance with 47 CFR Part 2.1093 for the device and pass the limit. The test results in this variant report apply exclusively to the tested model / sample. Without written approval of SPORTON INTERNATIONAL INC. EMC & Wireless Communications Laboratory, the test report shall not be reproduced except in full. Approved by: Cona Huang / Deputy Manager SPORTON INTERNATIONAL INC. EMC & Wireless Communications Laboratory No. 52, Huaya 1st Rd., Guishan Dist., Taoyuan City, Taiwan (R.O.C.) TEL : 886-3-327-3456 Page 1 of 17 FAX : 886-3-328-4978 Issued Date : Mar. 13, 2019 Form version: 180516

RF EXPOSURE EVALUATION REPORT Report No. : FA8D2018B Table of Contents 1. Summary ........................................................................................................................................................................ 4 2. Guidance Applied .......................................................................................................................................................... 4 3. Equipment Under Test (EUT) Information ................................................................................................................... 5 3.1 General Information ............................................................................................................................................... 5 4. RF Exposure Limits....................................................................................................................................................... 6 4.1 Uncontrolled Environment ...................................................................................................................................... 6 4.2 Controlled Environment.......................................................................................................................................... 6 5. System Description and Setup .................................................................................................................................... 7 5.1 EUmmWave Probe / E-Field 5G Probe .................................................................................................................. 8 5.2 Data Acquisition Electronics (DAE) ........................................................................................................................ 9 5.3 Scan configuration ................................................................................................................................................. 9 6. Test Equipment List ...................................................................................................................................................... 9 7. System Verification Source .........................................................................................................................................10 8. Power Density System Verification ............................................................................................................................11 9. System Verification Results ........................................................................................................................................11 9.1 Computation of the Electric Field Polarization Ellipse ...........................................................................................12 9.2 Total Field and Power Flux Density Reconstruction ..............................................................................................12 10. 802.11ad Duty cycle ...................................................................................................................................................13 11. Test Positions .............................................................................................................................................................14 12. RF Exposure Evaluation Results ..............................................................................................................................14 13. Simultaneous Transmission Analysis ......................................................................................................................15 14. Uncertainty Assessment ...........................................................................................................................................16 15. References ..................................................................................................................................................................17 Appendix A. Plots of System Performance Check Appendix B. Plots of Power Density Measurement Appendix C. DASY Calibration Certificate Appendix D. Simultaneous Transmission analysis Appendix E. Antenna Location & Test Setup Photos TEL : 886-3-327-3456 Page 2 of 17 FAX : 886-3-328-4978 Issued Date : Mar. 13, 2019 Form version: 180516

RF EXPOSURE EVALUATION REPORT Report No. : FA8D2018B History of this test report Report No. Version Description Issued Date FA8D2018B 01 Initial issue of report Mar. 13, 2019 TEL : 886-3-327-3456 Page 3 of 17 FAX : 886-3-328-4978 Issued Date : Mar. 13, 2019 Form version: 180516

RF EXPOSURE EVALUATION REPORT Report No. : FA8D2018B 1. Summary The maximum measured average power density found during testing for HTC Corporation, Smart Hub, are as follows. Simultaneous transmission with Standalone transmission other transmitters Highest Total Power Density, 2 Limit (FCC part 1.310) averaging over 4cm 2 Summation of Exposure Ratio 2 (mW/cm ) (mW/cm ) 802.11ad 0.867 1 0.998 2. Guidance Applied The Power Density testing specification, method, and procedure for this device is in accordance with the following standards: ‧ FCC 47 CFR Part 2.1091 ‧ FCC 47 CFR Part 2.1093 ‧ FCC KDB 865664 D02 SAR Reporting v01r02 ‧ FCC KDB 447498 D01 General RF Exposure Guidance v06 ‧ TCBC workshop notes ‧ IEC Draft TR 63170 TEL : 886-3-327-3456 Page 4 of 17 FAX : 886-3-328-4978 Issued Date : Mar. 13, 2019 Form version: 180516

RF EXPOSURE EVALUATION REPORT Report No. : FA8D2018B 3. Equipment Under Test (EUT) Information 3.1 General Information Product Feature & Specification Equipment Name Smart Hub Model Name 2Q6U100 FCC ID NM82Q6U100 LTE Band 2: 1850.7 MHz ~ 1909.3 MHz LTE Band 4: 1710.7 MHz ~ 1754.3 MHz LTE Band 5: 824.7 MHz ~ 848.3 MHz LTE Band 7: 2502.5 MHz ~ 2567.5 MHz LTE Band 12: 699.7 MHz ~ 715.3 MHz LTE Band 13: 779.5 MHz ~ 784.5 MHz LTE Band 25: 1850.7 MHz ~ 1914.3 MHz LTE Band 26: 814.7 MHz ~ 848.3 MHz LTE Band 41: 2498.5 MHz ~ 2687.5 MHz Wireless Technology and LTE Band 66: 1710.7 MHz ~ 1779.3 MHz Frequency Range LTE Band 71: 665.5 MHz ~ 695.5 MHz Sub 6G n41: 2506.02 MHz ~ 2679.99 MHz WLAN 2.4GHz Band: 2412 MHz ~ 2462 MHz WLAN 5.2GHz Band: 5180 MHz ~ 5240 MHz WLAN 5.3GHz Band: 5260 MHz ~ 5320 MHz WLAN 5.5GHz Band: 5500 MHz ~ 5720MHz WLAN 5.8GHz Band: 5745 MHz ~ 5825 MHz Bluetooth: 2402 MHz ~ 2480 MHz 802.11ad: 60GHz LTE / Sub 6G n41: QPSK, 16QAM, 64QAM 802.11a/b/g/n/ac HT20/HT40/VHT20/VHT40/VHT80 Mode 802.11ad Bluetooth BR/EDR/LE/HS EUT Stage Identical Prototype Reviewed by: Eric Huang Report Producer: Wan Liu TEL : 886-3-327-3456 Page 5 of 17 FAX : 886-3-328-4978 Issued Date : Mar. 13, 2019 Form version: 180516

RF EXPOSURE EVALUATION REPORT Report No. : FA8D2018B 4. RF Exposure Limits 4.1 Uncontrolled Environment Uncontrolled Environments are defined as locations where there is the exposure of individuals who have no knowledge or control of their exposure. The general population/uncontrolled exposure limits are applicable to situations in which the general public may be exposed or in which persons who are exposed as a consequence of their employment may not be made fully aware of the potential for exposure or cannot exercise control over their exposure. Members of the general public would come under this category when exposure is not employment-related; for example, in the case of a wireless transmitter that exposes persons in its vicinity. 4.2 Controlled Environment Controlled Environments are defined as locations where there is exposure that may be incurred by persons who are aware of the potential for exposure, (i.e. as a result of employment or occupation). In general, occupational/controlled exposure limits are applicable to situations in which persons are exposed as a consequence of their employment, who have been made fully aware of the potential for exposure and can exercise control over their exposure. The exposure category is also applicable when the exposure is of a transient nature due to incidental passage through a location where the exposure levels may be higher than the general population/uncontrolled limits, but the exposed person is fully aware of the potential for exposure and can exercise control over his or her exposure by leaving the area or by some other appropriate means. The criteria listed in Table 1 shall be used to evaluate the environmental impact of human exposure above 6GHz to radio frequency (RF) radiation as specified in §1.1310. 2 General Population Basic restriction for power density for frequencies between 1.5GHz and 100 GHz is 1.0 mW/cm = 10 2 W/m Table 1 TEL : 886-3-327-3456 Page 6 of 17 FAX : 886-3-328-4978 Issued Date : Mar. 13, 2019 Form version: 180516

RF EXPOSURE EVALUATION REPORT Report No. : FA8D2018B 5. System Description and Setup The system to be used for the near field power density measurement  SPEAG DASY6 system  SPEAG cDASY6 5G module software  EUmmWVx probe  5G Phantom cover TEL : 886-3-327-3456 Page 7 of 17 FAX : 886-3-328-4978 Issued Date : Mar. 13, 2019 Form version: 180516

RF EXPOSURE EVALUATION REPORT Report No. : FA8D2018B 5.1 EUmmWave Probe / E-Field 5G Probe The probe design allows measurements at distances as small as 2 mm from the sensors to the surface of the device under test (DUT). The typical sensor to probe tip distance is 1.5 mm. Frequency 750 MHz – 110 GHz Probe Overall Length 320 mm Probe Body Diameter 8.0 mm Tip Length 23.0 mm Tip Diameter 8.0 mm Probe’s two dipoles length 0.9 mm – Diode loaded Dynamic Range < 20 V/m - 10000 V/m with PRE-10 (min < 50 V/m - 3000 V/m) Position Precision < 0.2 mm Distance between diode sensors and 1.5 mm probe’s tip Minimum Mechanical separation 0.5 mm between probe tip and a Surface E-field measurements of 5G devices and other mm-wave transmitters Applications operating above 10GHz in < 2 mm distance from device (free-space) Power density, H-field and far-field analysis using total field reconstruction. Compatibility cDASY6 + 5G-Module SW1.0 and higher TEL : 886-3-327-3456 Page 8 of 17 FAX : 886-3-328-4978 Issued Date : Mar. 13, 2019 Form version: 180516

RF EXPOSURE EVALUATION REPORT Report No. : FA8D2018B 5.2 Data Acquisition Electronics (DAE) The data acquisition electronics (DAE) consists of a highly sensitive electrometer-grade preamplifier with auto-zeroing, a channel and gain-switching multiplexer, a fast 16 bit AD-converter and a command decoder and control logic unit. Transmission to the measurement server is accomplished through an optical downlink for data and status information as well as an optical uplink for commands and the clock. The input impedance of the DAE is 200 MOhm; the inputs are symmetrical and floating. Common mode rejection is above 80 dB. 5.3 Scan configuration Fine-resolution scans on 2 different planes are performed to reconstruct the E- and H-fields as well as the power density; the z-distance between the 2 planes is set to λ/4. The (x, y) grid step is also setλ/4, the grid extent is set to sufficiently large to identify the field pattern and the peak. 6. Test Equipment List Calibration Manufacturer Name of Equipment Type/Model Serial Number Last Cal. Due Date SPEAG 5G Verification Source 60 GHz 1009 Apr. 05, 2018 Apr. 04, 2019 SPEAG EUmmWV Probe Tip Protection EUmmWV3 9390 Jun. 28, 2018 Jun. 27, 2019 SPEAG Data Acquisition Electronics DAE4 778 May. 25, 2018 May. 24, 2019 Gencom Thermometer TE1 TM225-1 Mar. 16, 2018 Mar. 15, 2019 Gencom Thermometer TE1 TM225-1 Mar. 16, 2018 Mar. 15, 2019 OML Mixer M15HW/A V91113-1 Oct. 10, 2018 Oct. 09, 2019 Rohde & Schwarz Spectrum Analyzer FSV40 101408 Jul. 30, 2018 Jul. 29, 2019 Custom Microwave Standard Horn antenna M15RH V91113-A NCR NCR TEL : 886-3-327-3456 Page 9 of 17 FAX : 886-3-328-4978 Issued Date : Mar. 13, 2019 Form version: 180516

RF EXPOSURE EVALUATION REPORT Report No. : FA8D2018B 7. System Verification Source The System Verification sources at 30 GHz and above comprise horn-antennas and very stable signal generators. Model Ka-band horn antenna Calibrated frequency: 30 GHz at 10mm from the case surface Frequency accuracy ± 100 MHz E-field polarization linear Harmonics -20 dBc Total radiated power 14 dBm Power stability 0.05 dB Power consumption 5W Size 00 x 100 x 100 mm Weight 1 kg TEL : 886-3-327-3456 Page 10 of 17 FAX : 886-3-328-4978 Issued Date : Mar. 13, 2019 Form version: 180516

RF EXPOSURE EVALUATION REPORT Report No. : FA8D2018B 8. Power Density System Verification The system performance check verifies that the system operates within its specifications. The EUT is replaced by a calibrated source, the same spatial resolution, measurement region and the test separation used in the calibration was applied to system check. Through visual inspection into the measured power density distribution, both spatially (shape) and numerically (level) have no noticeable difference. The measured results should be within 10% of the calibrated targets. Settings for measurement of verification sources Verification Setup photo 9. System Verification Results 5G Measured Targeted Frequency Probe DAE Distance Deviation Date Verification 4 cm² 4 cm² (GHz) S/N S/N (mm) (%) Source (W/m²) (W/m²) 2019/2/12 60 60GHz-1009 9390 778 10 227 231.223 -1.83% 2019/2/19 60 60GHz-1009 9390 778 10 231 231.223 -0.10% 2019/2/26 60 60GHz-1009 9390 778 10 234 231.223 1.20% 2019/3/5 60 60GHz-1009 9390 778 10 223 231.223 -3.56% TEL : 886-3-327-3456 Page 11 of 17 FAX : 886-3-328-4978 Issued Date : Mar. 13, 2019 Form version: 180516

RF EXPOSURE EVALUATION REPORT Report No. : FA8D2018B 9.1 Computation of the Electric Field Polarization Ellipse For the numerical description of an arbitrarily oriented ellipse in three-dimensional space, five parameters are needed: the semi-major axis (a), the semi-minor axis (b), two angles describing the orientation of the normal vector of the ellipse (∅, θ), and one angle describing the tilt of the semi-major axis (ψ). For the two extreme cases, i.e., circular and linear polarizations, three parameters only (a, ∅ and θ) are sufficient for the description of the incident field. Illustration of the angles used for the numerical description of the sensor and the orientation of an ellipse in 3-D space. For the reconstruction of the ellipse parameters from measured data, the problem can be reformulated as a nonlinear search problem. The semi-major and semi-minor axes of an elliptical field can be expressed as functions of the three angles (∅, θ and ψ). The parameters can be uniquely determined towards minimizing the error based on least-squares for the given set of angles and the measured data. In this way, the number of free parameters is reduced from five to three, which means that at least three sensor readings are necessary to gain sufficient information for the reconstruction of the ellipse parameters. However, to suppress the noise and increase the reconstruction accuracy, it is desirable that the system of equations be over determined. The solution to use a probe consisting of two sensors angled by r1 and r2 toward the probe axis and to perform measurements at three angular positions of the probe, i.e., at β1, β2 and β3, results in over-determinations by a factor of two. If there is a need for more information or increased accuracy, more rotation angles can be added. The reconstruction of the ellipse parameters can be separated into linear and non-linear parts that are best solved by the Givens algorithm combined with a downhill simplex algorithm. To minimize the mutual coupling, sensor angles are set with a shift of 90 degree (r2 = r1 + 90 degree), and to simplify, the first rotation angle of the probe (β1) can be set to 0 degree 9.2 Total Field and Power Flux Density Reconstruction Computation of the power density in general requires knowledge of the electric and magnetic field amplitudes and phases in the plane of incidence. Reconstruction of these quantities from pseudo-vector E-field measurements is feasible, as they are constrained by Maxwell's equations. SPEAG have developed a reconstruction approach based on the Gerchberg-Saxton algorithm, which benefits from the availability of the E-field polarization ellipse information obtained with the EUmmWV2 probe. The average of the reconstructed power density is evaluated over a circular area in each measurement plane. Two average power density values can be computed, the average total power density and the average incident power density, and the average total power density is used to determine compliance. The software post-processing reports to values, “S avg tot” and “S avg inc”. “S avg tot” represents average total power density (all three xyz components included), and “S avg inc” represents average normal power density. The average total power density “S avg tot” is reported to determine the device compliance. TEL : 886-3-327-3456 Page 12 of 17 FAX : 886-3-328-4978 Issued Date : Mar. 13, 2019 Form version: 180516

RF EXPOSURE EVALUATION REPORT Report No. : FA8D2018B 10. 802.11ad Duty cycle <Duty Cycle> The actual 11ad RF signal is a wideband signal and is limited to transmit at 85% duty cycle. Mode On Time(ms) On+Off Time(ms) Duty Cycle (%) 802.11ad 7.5217 9.0435 83.17% TEL : 886-3-327-3456 Page 13 of 17 FAX : 886-3-328-4978 Issued Date : Mar. 13, 2019 Form version: 180516

RF EXPOSURE EVALUATION REPORT Report No. : FA8D2018B 11. Test Positions 802.11ad Measurement Plane antenna Front Back Left Right Top Bottom module @ 10 mm @ 10 mm @ 10 mm @ 10 mm @ 10 mm @ 10 mm Left Yes Yes Yes No Yes No Right Yes Yes No Yes Yes No General Note: 1. According to appendix E antenna location, when the antenna to the edge is higher than 25mm, for that edge is not tested. 12. RF Exposure Evaluation Results General Note: 1. The 802.11ad PD test was performed of a 10mm separation between sensor and EUT surface (the probe tip is 0.5mm to the EUT surface). 2. The test position/separation and the area to scan for each test is selected and identified in the simulation report, details in illustrated in the simulation report exhibit and the operational description. 3. Using test software, the device under test was configured to transmit maximum power and at 100% duty cycle, at the center frequency of each desired channel. The actual 11ad RF signal is a wideband signal and is limited to transmit at 85% duty cycle. Therefore the measured maximum 4cm^2 average power density was scaled to account for the 85% duty factor. 4. According to TCBC Workshop in October 2018, 4 cm^2 averaging area may now be considered. 5. Above 6 GHz, Maximum Permissible Exposure (MPE) limits apply to portable exposure conditions according to 47 CFR §2.1093. Measured Measured 4cm^2 EIRP 4cm^2 4cm^2 802.11ad Test Average Plot Exposure Test Average E-peak H-peak Average Average antenna Distance Channel Sector Total No. plane Position Power [V/m] [A/m] Normal Total module (mm) PD (dBm) PD PD (W/m^2)*85% (W/m^2) (W/m^2) Left 10 1 34 1 Front 14.66 103.00 0.277 7.620 8.34 7.09 Left 10 1 36 1 Front 8.83 91.60 0.24 4.89 6.45 5.48 Left 10 3 34 1 Front 15.54 106.00 0.26 7.74 8.56 7.28 01 Left 10 3 40 1 Front 23.01 125 0.315 9.39 10.2 8.67 Left 10 4 37 1 Front 13.24 93.8 0.256 6.38 7.7 6.55 Left 10 4 36 1 Front 19.38 126.00 0.32 7.92 8.21 6.98 Left 10 1 33 2 Back 2.94 19.6 0.053 0.789 0.8 0.68 Left 10 1 58 3 Top Side 14.10 26.6 0.065 0.677 0.711 0.60 Left 10 4 50 4 Left Side 10.30 35.8 0.091 0.866 0.89 0.76 Right 10 1 10 1 Front 10.29 105.0 0.281 6.560 7.81 6.64 Right 10 1 20 1 Front 13.61 86.5 0.211 4.580 4.90 4.17 Right 10 2 3 1 Front 11.56 106.0 0.277 8.110 9.20 7.82 Right 10 2 12 1 Front 12.05 91.3 0.218 5.390 6.40 5.44 Right 10 4 12 1 Front 15.55 129.0 0.329 9.01 9.97 8.47 Right 10 4 3 1 Front 12.41 109 0.279 7.74 8.06 6.85 Right 10 2 13 2 Back 10.18 32.1 0.092 1.44 1.47 1.25 Right 10 2 18 3 Right Side 9.56 20.3 0.055 0.511 0.531 0.45 Right 10 4 8 4 Top Side 6.70 26.6 0.068 1.01 1.07 0.91 TEL : 886-3-327-3456 Page 14 of 17 FAX : 886-3-328-4978 Issued Date : Mar. 13, 2019 Form version: 180516

RF EXPOSURE EVALUATION REPORT Report No. : FA8D2018B 13. Simultaneous Transmission Analysis Simultaneous 802.11ad 802.11ad Sub-6G 2.4GHz 2.4GHz 5GHz 4GHz transmission LTE LTE LTE (Left (Right n41 WLAN/BT WLAN WLAN WLAN combination Ant 0 Ant 1 Ant 2 Antenna Antenna Ant 5 Ant 0 Ant 1 Ant 0 Ant 1 scenarios module) module) 1           2           3           4           5           6           7           8           9           10           11           12           13           14           15           16           17           18           General Note: 1. The WWAN / WLAN and BT SAR test results were referring the report of FCC ID: NM82Q6U100 (Sporton SAR Report No. FA8D2018A) 2. For 802.11ad, the left and right antennas can’t transmit simultaneously. 3. The 802.11ad PD test was performed of a 10mm separation between sensor and EUT surface, the test results are conservatively used in simultaneous transmission analysis in body exposure conditions. 4. for Sub-6G n41 only can transmit simultaneous with TDD LTE B41 at antenna 2 5. Considering 802.11ad with WWAN / WLAN and Bluetooth can transmit simultaneously, the basic restrictions are on SAR and power density, and summation of these quantities should follow below formula and the simultaneous transmission analysis was following below step and the detail analysis please refer to appendix D: i) Use the standalone SAR according original report to collocate with 802.11ad power density at each exposure positions, if the result < 1, additional analysis is not necessary. ii) If this ratio is larger than 1, use surface single point SAR measurements and treat as 1-gram measurements with 1.6 W/kg as the limit. Use these measurement for the point by point summation and confirm the ratio summation does not exceed 1 The [∑ of (the highest measured or estimated SAR for each standalone antenna configuration, adjusted for maximum tune-up tolerance) / 1.6 W/kg] + [∑ of MPE ratios] is ≤ 1.0. Test Engineer： Aaron Chen, Steven Chang, Thomas Wang, and Nick Yu TEL : 886-3-327-3456 Page 15 of 17 FAX : 886-3-328-4978 Issued Date : Mar. 13, 2019 Form version: 180516

RF EXPOSURE EVALUATION REPORT Report No. : FA8D2018B 14. Uncertainty Assessment The budget is valid for evaluation distances > λ/2π. For specific tests and configurations, the Uncertainty could be considerably smaller. Preliminary Module mmWave Uncertainty Budget Evaluation Distances to the Antennas > λ / 2π Uncertainty Standard (Vi) Error Description Value Probability Divisor (Ci) Uncertainty Veff (± dB) (±dB) Measurement System Probe Calibration 0.49 N 1 1 0.49 ∞ Hemispherical Isotropy 0.50 R 1.732 1 0.29 ∞ Linearity 0.20 R 1.732 0 0.12 ∞ System Detection Limits 0.04 R 1.732 1 0.02 ∞ Modulation Response 0.40 R 1.732 1 0.23 ∞ Readout Electronics 0.03 N 1 1 0.03 ∞ Response Time 0.00 R 1.732 1 0.00 ∞ Integration Time 0.00 R 1.732 1 0.00 ∞ RF Ambient Noise 0.2 R 1.732 1 0.12 ∞ RF Ambient Reflections 0.21 R 1.732 1 0.12 ∞ Probe Positioner 0.04 R 1.732 1 0.02 ∞ Probe Positioning 0.30 R 1.732 1 0.17 ∞ Savg Reconstruction 0.60 R 1.732 1 0.35 ∞ Test Sample Related Power Drift 0.2 R 1.732 1 0.12 ∞ Input Power 0 N 1 0 0.00 ∞ Combined Std. Uncertainty 0.76 dB ∞ Coverage Factor for 95 % K=2 Expanded STD Uncertainty 1.52 dB TEL : 886-3-327-3456 Page 16 of 17 FAX : 886-3-328-4978 Issued Date : Mar. 13, 2019 Form version: 180516

RF EXPOSURE EVALUATION REPORT Report No. : FA8D2018B 15. References [1] FCC 47 CFR Part 2 “Frequency Allocations and Radio Treaty Matters; General Rules and Regulations” [2] FCC KDB 447498 D01 v06, “Mobile and Portable Device RF Exposure Procedures and Equipment Authorization Policies”, Oct 2015 [3] FCC KDB 865664 D02 v01r02, “RF Exposure Compliance Reporting and Documentation Considerations” Oct 2015. [4] FCC KDB 648474 D04 v01r03, “SAR Evaluation Considerations for Wireless Handsets”, Oct 2015. TEL : 886-3-327-3456 Page 17 of 17 FAX : 886-3-328-4978 Issued Date : Mar. 13, 2019 Form version: 180516


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Document Modified: 2019-05-13 20:57:28
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