Test Report HAC T-Coil

FCC ID: UZ7TC77HL

Test Report

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FCCID_4030255

HAC T-COIL TEST REPORT Report No. : HA872506-03B HEARING AID COMPATIBILITY T-COIL TEST REPORT FCC ID : UZ7TC77HL Equipment : Touch computer Brand Name : Zebra Model Name : TC77HL T-Rating : T3 Applicant : Zebra Technologies Corporation 1 Zebra Plaza Holtsville, NY 11742 Manufacturer : Zebra Technologies Corporation 1 Zebra Plaza Holtsville, NY 11742 Standard : FCC 47 CFR §20.19 ANSI C63.19-2011 The product was received on Jul. 25, 2018 and testing was started from Aug. 13, 2018 and completed on Sep. 11, 2018. We, SPORTON INTERNATIONAL INC., would like to declare that the tested sample has been evaluated in accordance with the test procedures and has been in compliance with the applicable technical standards. The report must not be used by the client to claim product certification, approval, or endorsement by TAF or any agency of government. The test results in this variant report apply exclusively to the tested model / sample. Without written approval of SPORTON INTERTIONAL INC. EMC & Wireless Communications Laboratory, the test report shall not be reproduced except in full. Approved by: Cona Huang / Deputy Manager SPORTON INTERTIONAL 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 21 FAX : 886-3-328-4978 Issued Date : Oct. 05, 2018 Form version: 180516

HAC T-COIL TEST REPORT Report No. : HA872506-03B Table of Contents 1. Attestation of Test Results ........................................................................................................................................ 4 2. General Information ................................................................................................................................................... 5 3. Testing Location......................................................................................................................................................... 6 4. Applied Standards ..................................................................................................................................................... 6 5. Air Interface and Operating Mode............................................................................................................................. 7 6. Measurement standards for T-Coil ........................................................................................................................... 8 6.1 Frequency Response ....................................................................................................................................... 8 6.2 T-Coil Signal Quality Categories ....................................................................................................................... 8 7. T-Coil Test Procedure ................................................................................................................................................ 9 7.1 Test Flow Chart................................................................................................................................................10 7.2 Test Setup Diagram ......................................................................................................................................... 11 7.3 Description of EUT Test Position .....................................................................................................................13 8. Test Equipment List ..................................................................................................................................................14 9. T-Coil testing for OTT VoIP Application ..................................................................................................................15 10. Uncertainty Assessment ..........................................................................................................................................20 11. References .................................................................................................................................................................21 Appendix A. Plots of T-Coil Measurement Appendix B. DASY Calibration Certificate Appendix C. Test Setup Photos TEL : 886-3-327-3456 Page : 2 of 21 FAX : 886-3-328-4978 Issued Date : Oct. 05, 2018 Form version: 180516

HAC T-COIL TEST REPORT Report No. : HA872506-03B History of this test report Report No. Version Description Issued Date HA872506-03B Rev. 01 Initial issue of report Oct. 05, 2018 TEL : 886-3-327-3456 Page : 3 of 21 FAX : 886-3-328-4978 Issued Date : Oct. 05, 2018 Form version: 180516

HAC T-COIL TEST REPORT Report No. : HA872506-03B 1. Attestation of Test Results Frequency Magnetic Air Interface Band MHz T-Rating Response Intensity GSM850 T3 Pass Pass OTT over EDGE GSM1900 T3 Pass Pass Band 2 T4 Pass Pass OTT over UMTS Band 4 T4 Pass Pass Band 5 T4 Pass Pass Band 2 T4 Pass Pass Band 4 T4 Pass Pass Band 5 T4 Pass Pass Band 7 T4 Pass Pass Band 12 T4 Pass Pass Band 13 T4 Pass Pass OTT over LTE Band 14 T4 Pass Pass Band 17 T4 Pass Pass Band 25 T4 Pass Pass Band 26 T4 Pass Pass Band 66 T4 Pass Pass Band 38 T4 Pass Pass Band 41 T3 Pass Pass 2450 T3 Pass Pass 5200 T3 Pass Pass OTT over WiFi 5300 T3 Pass Pass 5500 T3 Pass Pass 5800 T3 Pass Pass Date Tested 2018/8/13 ~ 2018/9/11 The device is compliance with HAC limits specified in guidelines FCC 47CFR §20.19 and ANSI Standard ANSI C63.19. Reviewed by: Jason Wang Report Producer: Wan Liu TEL : 886-3-327-3456 Page : 4 of 21 FAX : 886-3-328-4978 Issued Date : Oct. 05, 2018 Form version: 180516

HAC T-COIL TEST REPORT Report No. : HA872506-03B 2. General Information Product Feature & Specification Applicant Name Zebra Technologies Corporation Equipment Name Touch computer Brand Name Zebra Model Name TC77HL FCC ID UZ7TC77HL HW Version DV SW Version Android version 8.1.0 FW Version 91-09-14.00-OG-U00-STD MFD 06JUL18 EUT Stage Engineering sample GSM850: 824.2 MHz ~ 848.8 MHz GSM1900: 1850.2 MHz ~ 1909.8 MHz WCDMA Band II: 1852.4 MHz ~ 1907.6 MHz WCDMA Band IV: 1712.4 MHz ~ 1752.6 MHz WCDMA Band V: 826.4 MHz ~ 846.6 MHz 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 14: 790.5 MHz ~ 795.5 MHz Frequency Band LTE Band 17: 706.5 MHz ~ 713.5 MHz LTE Band 25: 1850.7 MHz ~ 1914.3 MHz LTE Band 26: 814.7 MHz ~ 848.3 MHz LTE Band 38: 2572.5 MHz ~ 2617.5 MHz LTE Band 41: 2498.5 MHz ~ 2687.5 MHz LTE Band 66: 1710.7 MHz ~ 1779.3 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 ~ 5720 MHz WLAN 5.8GHz Band: 5745 MHz ~ 5825 MHz Bluetooth: 2402 MHz ~ 2480 MHz NFC: 13.56 MHz GSM/GPRS/EGPRS/DTM AMR / RMC 12.2Kbps HSDPA HSUPA Mode DC-HSDPA LTE: QPSK, 16QAM, 64QAM 802.11a/b/g/n/ac HT20/HT40/VHT20/VHT40/VHT80 Bluetooth BR/EDR/LE NFC:ASK TEL : 886-3-327-3456 Page : 5 of 21 FAX : 886-3-328-4978 Issued Date : Oct. 05, 2018 Form version: 180516

HAC T-COIL TEST REPORT Report No. : HA872506-03B Specification of Accessories AC Adapter Brand Name Zebra Part Number PWR-BUA5V16W0WW 4 PIN DC power cable Brand Name Zebra Part Number CBL-DC-383A1-01 AC Power cable Brand Name Zebra Part Number 50-16000-182R Snap-On USB/Charge Cable Brand Name Zebra Part Number CBL-TC7X-USB1-01 Snap-On Charging Cable Cup Brand Name Zebra Part Number CHG-TC7X-CBL1-01 Battery 1 Brand Name Zebra Part Number BT-000318-01 Battery 2 (Falcon 1S3P Battery Pack) Brand Name Zebra Part Number BT-000318-51 Battery 3 Brand Name Symbol Part Number 82-171249-02 Earphone 1 Brand Name Zebra Part Number HDST-35MM-PTVP-01 Earphone 2 Brand Name Zebra Part Number HS2100-OTH Snap-on 3.5MM Audio Jack Adapter Brand Name Symbol Part Number ADP-TC7X-AUD35-01 3.5mm Jack 43"(1.1m) Standard Cable Brand Name Zebra Part Number CBL-HS2100-3MS1-01 Soft Holster Brand Name Zebra Part Number SG-TC7X-HLSTR1-02 Rigid Holster Brand Name Zebra Part Number SG-TC7X-RHLSTR1-01 Remark: 1. There are three battery option, for T-coil evaluation is selected battery1 as the main test, others battery option choose worst air interface to be tested. 3. Testing Location Sporton Lab is accredited to ISO 17025 by Taiwan Accreditation Foundation (TAF code: 1190) and the FCC designation No. TW1190 under the FCC 2.948(e) by Mutual Recognition Agreement (MRA) in FCC test. Testing Laboratory Test Site SPORTON INTERNATIONAL INC. No. 52, Huaya 1st Rd., Guishan Dist., Taoyuan City, Taiwan (R.O.C.) Test Site Location TEL: +886-3-327-3456 FAX: +886-3-328-4978 Sporton Site No.: Test Site No. SAR04-HY 4. Applied Standards ‧ FCC CFR47 Part 20.19 ‧ ANSI C63.19 2011-version ‧ FCC KDB 285076 D01 HAC Guidance v05 ‧ FCC KDB 285076 D02 T Coil testing v03 ‧ FCC KDB 285076 D03 HAC FAQ v01 TEL : 886-3-327-3456 Page : 6 of 21 FAX : 886-3-328-4978 Issued Date : Oct. 05, 2018 Form version: 180516

HAC T-COIL TEST REPORT Report No. : HA872506-03B 5. Air Interface and Operating Mode C63.19 Simultaneous Name of Voice Power Air Interface Band MHz Type Tested Transmitter Service Reduction EDGE850 WLAN, BT Google Duo(1) No GSM VD Yes / EDGE1900 WLAN, BT WFC(1,2) No 850 HSPA WLAN, BT Google Duo (1) No UMTS 1750 HSPA VD Yes WLAN, BT / No 1900 HSPA WLAN, BT WFC(1,2) No Band 2 WLAN, BT No Band 4 WLAN, BT No Band 5 WLAN, BT No Band 7 WLAN, BT No Band 12 WLAN, BT Google Duo(1) No LTE Band 13 VD Yes WLAN, BT / No (FDD) Band 14 WLAN, BT WFC(1,2) No Band 17 WLAN, BT No Band 25 WLAN, BT No Band 26 WLAN, BT No Band 66 WLAN, BT No Band 38 WLAN, BT Google Duo(1) No LTE VD Yes / (TDD) Band 41 WLAN, BT WFC(1,2) No 2450 No 5200 Google Duo (1) No Wi-Fi 5300 VD Yes GSM,WCDMA,LTE / No 5500 WFC(1,2) No 5800 No BT 2450 DT No GSM,WCDMA,LTE NA No Type Transport: VO= Voice only DT= Digital Transport only (no voice) VD= CMRS and IP Voice Service over Digital Transport Remark: 1. For protocols not listed in Table 7.1 of ANSI C63.19-2011 or the ANSI C63.19-2011 VoLTE interpretation, the average speech level of −20 dBm0 should be used. 2. The Workforce Connect (WFC) is an over-the-top (OTT) – voice services operating over IP, and this voice application was development and pre-installed on a wireless handset by the Zebra Technologies Corporation. 3. The device have similar frequency in some LTE bands: LTE B12/17, 5/26, 4/66, 38/41, since the supported frequency spans for the smaller LTE bands are completely cover by the larger LTE bands, therefore, only larger LTE bands were required to be tested for hearing-aid compliance. 4. This is a variant report to add VoIP evaluation for TC77HL, others VoLTE and CMRS Voice operation refer to Sporton HAC report, FCC ID: UZ7TC77HL, Report No.: HA872506B. TEL : 886-3-327-3456 Page : 7 of 21 FAX : 886-3-328-4978 Issued Date : Oct. 05, 2018 Form version: 180516

HAC T-COIL TEST REPORT Report No. : HA872506-03B 6. Measurement standards for T-Coil 6.1 Frequency Response The frequency response of the perpendicular component of the magnetic field, measured in 1/3 octave bands, shall follow the response curve specified in this sub-clause, over the frequency range 300 Hz to 3000 Hz. Figure 1.1 and Figure 1.2 provide the boundaries as a function of frequency. These response curves are for true field-strength measurements of the T-Coil signal. Thus, the 6 dB/octave probe response has been corrected from the raw readings. Fig. 1.1 Magnetic field frequency response for WDs with field strength≤-15dB at 1 KHz Fig. 1.2 Magnetic field frequency response for WDs with a field that exceeds –15 dB(A/m) at 1 kHz 6.2 T-Coil Signal Quality Categories This section provides the signal quality requirement for the intended T-Coil signal from a WD. Only the RF immunity of the hearing aid is measured in T-Coil mode. It is assumed that a hearing aid can have no immunity to an interference signal in the audio band, which is the intended reception band for this mode. A device is assessed beginning by determining the category of the RF environment in the area of the T-Coil source. The RF measurements made for the T-Coil evaluation are used to assign the category T1 through T4. The limitation is given in Table 1. This establishes the RF environment presented by the WD to a hearing aid. Telephone parameters WD signal quality Category ((signal + noise) to noise ratio in dB) Category T1 0 to 10 dB Category T2 10 to 20 dB Category T3 20 to 30 dB Category T4 > 30 dB Table 1 T-Coil Signal Quality Categories TEL : 886-3-327-3456 Page : 8 of 21 FAX : 886-3-328-4978 Issued Date : Oct. 05, 2018 Form version: 180516

HAC T-COIL TEST REPORT Report No. : HA872506-03B 7. T-Coil Test Procedure Referenced to ANSI C63.19-2011, Section 7.4, This section describes the procedures used to measure the ABM (T-Coil) performance of the WD. In addition to measuring the absolute signal levels, the A-weighted magnitude of the unintended signal shall also be determined. To assure that the required signal quality is measured, the measurement of the intended signal and the measurement of the unintended signal must be made at the same location for each measurement position. In addition, the RF field strength at each measurement location must be at or below that required for the assigned category. Measurements shall not include undesired properties from the WD's RF field; therefore, use of a coaxial connection to a base station simulator or non-radiating load, there might still be RF leakage from the WD, which can interfere with the desired measurement. Pre-measurement checks should be made to avoid this possibility. All measurements shall be performed with the WD operating on battery power with an appropriate normal speech audio signal input level given in ANSI C63.19-2011 Table 7.1. If the device display can be turned off during a phone call, then that may be done during the measurement as well, Measurement shall be performed at two locations specified in ANSI C63.19-2011 A.3, with the correct probe orientation for a particular location, in a multistage sequence by first measuring the field intensity of the desired T-Coil signal the same location as the desired ABM or T-Coil signal (ABM1), and the ratio of desired to undesired magnetic components (ABM2) must be measured at the same location as the desired ABM or T-Coil signal (ABM1), and the ratio of desired to undesired ABM signals must be calculated. For the perpendicular field location, only the ABM1 frequency response shall be determined in a third measurement stage. The following steps summarize the basic test flow for determining ABM1 and ABM2. These steps assume that a sine wave or narrowband 1/3 octave signal can be used for the measurement of ABM1. a. A validation of the test setup and instrumentation may be performed using a TMFS or Helmholtz coil Measure the emissions and confirm that they are within the specified tolerance. b. Position the WD in the test setup and connect the WD RF connector to a base station simulator or a non-radiating load. Confirm that equipment that requires calibration has been calibrated, and that the noise level meets the requirements given in ANSI C63.19-2011 clause 7.3.1. c. The drive level to the WD ise set such that the reference input level specified in ANSI C63.19-2011 Table 7.1 is input to the base station simulator (or manufacturer's test mode equivalent) in 1 kHz, 1/3 octave band. This drive level shall be used for the T-Coil signal test (ABM1) at f = 1 kHz. Either a sine wave at 1025 Hz or a voice-like signal, band-limited to the 1 kHz 1/3 octave, as defined in ANSI C63.19-2011 clause 7.4.2, shall be used for the reference audio signal. If interference is found at 1025 Hz an alternative nearby reference audio signal frequency may be used. The same drive level shall be used for the ABM1 frequency response measurements at each 1/3 octave band center frequency. The WD volume control may be set at any level up to maximum, provided that a signal at any frequency at maximum modulation would not result in clipping or signal overload. d. Determine the magnetic measurement locations for the WD device (A.3), if not already specified by the manufacturer, as described in ANSI C63.19-2011 clause 7.4.4.1.1 and 7.4.4.2. e. At each measurement location, measure and record the desired T-Coil magnetic signals (ABM1 at fi) as described in ANSI C63.19-2011 clause 7.4.4.2 in each individual ISO 266-1975 R10 standard 1/3 octave band. The desired audio band input frequency (fi) shall be centered in each 1/3 octave band maintaining the same drive level as determined in item c) and the reading taken for that band. f. Equivalent methods of determining the frequency response may also be employed, such as fast Fourier transform (FFT) analysis using noise excitation or input-output comparison using simulated speech. The full-band integrated probe output, as specified in D.9, may be used, as long as the appropriate calibration curve is applied to the measured result, so as to yield an accurate measurement of the field magnitude. (The resulting measurement shall be an accurate measurement in dB A/m.) g. All Measurements of the desired signal shall be shown to be of the desired signal and not of an undesired signal. This may be shown by turning the desired signal ON and OFF with the probe measuring the same location. If the scanning method is used the scans shall show that all measurement points selected for the ABM1 measurement meet the ambient and test system noise criteria in ANSI C63.19-2011 clause 7.3.1. h. At the measurement location for each orientation, measure and record the undesired broadband audio magnetic signal (ABM2) as specified in ANSI C63.19-2011 clause 7.4.4.4 with no audio signal applied (or digital zero applied, if appropriate) using A-weighting and the half-band integrator. Calculate the ratio of the desired to undesired signal strength (i,e., signal quality). i. Obtain the data from the postprocessor, SEMCAD, and determine the category that properly classifies the signal quality based on ANSI C63.19-2011 Table 8.5. TEL : 886-3-327-3456 Page : 9 of 21 FAX : 886-3-328-4978 Issued Date : Oct. 05, 2018 Form version: 180516

HAC T-COIL TEST REPORT Report No. : HA872506-03B 7.1 Test Flow Chart Fig. 2 T-Coil Signal Test flowchart TEL : 886-3-327-3456 Page : 10 of 21 FAX : 886-3-328-4978 Issued Date : Oct. 05, 2018 Form version: 180516

HAC T-COIL TEST REPORT Report No. : HA872506-03B 7.2 Test Setup Diagram General Note: 1. Define the all applicable input audio level as below according to C63 and KDB 285076 D02v03: - GSM input level: -16dBm0 - UMTS input level: -16dBm0 - VoLTE input level: -16dBm0 - VoWiFi input level: -20dBm0 - OTT VoIP input Level: -20dBm0 2. For GSM / UMTS / CDMA test setup and input level, the correct input level definition is via a communication tester CMU200’s “Decoder Cal” and “Codec Cal” with audio option B52 and B85 to set the correct audio input levels. 3. CMU200 is able to output 1kHz audio signal equivalent to 3.14dBm0 at "Decoder Cal." confuguration, the signal reference is used to adjust the AMMI gain setting to reach -16dBm0 for GSM/UMTS. CMW500 input is calibrated and the relation between the analog input voltage and the internal level in dBm0 can be determined 4. The test setup used for VoLTE over IMS and VoWiFi over IMS is via the callbox of CMW500 for T-coil measurement, The data application unit of the CMW500 was used to simulate the IP multimedia subsystem server. The CMW500 can be manually configured to ensure and control the speech input level result is -16dBm0 for VoLTE, -20dBm0 for VoWiFi when the device during the IMS connection. 5. The test setup used for Google DUO VoIP call is via the data application unit on CMW500 connection to the Internet, also connection to the other auxiliary VoIP unit which is used to configure the audio codec and bit rate and also monitor the audio input level of -20dBm0. 6. The test setup used for WFC VoIP application is via the data application unit on CMW500 connection to the Internet, also connection to the other auxiliary VoIP unit which is used to configure the audio codec and bit rate and can be determined the audio input level of -20dBm0. TEL : 886-3-327-3456 Page : 11 of 21 FAX : 886-3-328-4978 Issued Date : Oct. 05, 2018 Form version: 180516

HAC T-COIL TEST REPORT Report No. : HA872506-03B 1. The Required gain factor for the specific signal shall typically be multiplied by this factor to achieve approx. the same level as for the 1kHz sine signal 2. The below calculation formula is an example and showing how to determine the input level for the device. Calculation formula: - Audio Level at -16dBm0 = ((-16dBm0) – (3.14dBm0)) + X dBv - Calculated Gain at -16dBm0 = 10(( audio level at -16dBm0 – Y dBm0) / 20) * 10 - Gatting setting at -16dBm0 = required gain factor * calculated gain Gain Value 20* log(gain) AMCC Coil In Level (linear) dB (dBv RMS) dBm0 -2.47 3.14 10 20 -19.85 -14.24 8.17 18.24 -21.61 -16 Duration Peak to RMS RMS Required Gain Calculated Signal Type (s) (dB) (dB) Factor Gain Setting 1kHz sine - 3 0 1 8.17 48k_voice_1kHz 1 16.2 -12.7 4.33 35.36 48k_voice_300Hz ~ 3kHz 2 21.6 -18.6 8.48 69.25 TEL : 886-3-327-3456 Page : 12 of 21 FAX : 886-3-328-4978 Issued Date : Oct. 05, 2018 Form version: 180516

HAC T-COIL TEST REPORT Report No. : HA872506-03B 7.3 Description of EUT Test Position Fig.3 illustrate the references and reference plane that shall be used in a typical EUT emissions measurement. The principle of this section is applied to EUT with similar geometry. Please refer to Appendix C for the setup photographs.  The area is 5 cm by 5 cm.  The area is centered on the audio frequency output transducer of the EUT.  The area is in a reference plane, which is defined as the planar area that contains the highest point in the area of the phone that normally rests against the user’s ear. It is parallel to the centerline of the receiver area of the phone and is defined by the points of the receiver-end of the EUT handset, which, in normal handset use, rest against the ear.  The measurement plane is parallel to, and 10 mm in front of, the reference plane. Fig.3 A typical EUT reference and plane for T-Coil measurements TEL : 886-3-327-3456 Page : 13 of 21 FAX : 886-3-328-4978 Issued Date : Oct. 05, 2018 Form version: 180516

HAC T-COIL TEST REPORT Report No. : HA872506-03B 8. Test Equipment List Calibration Manufacturer Name of Equipment Type/Model Serial Number Last Cal. Due Date SPEAG Audio Magnetic 1D Field Probe AM1DV3 3130 Nov. 21, 2017 Nov. 20, 2018 SPEAG Data Acquisition Electronics DAE4 917 Dec. 14, 2017 Dec. 13, 2018 SPEAG Data Acquisition Electronics DAE4 853 Jul. 24, 2018 Jul. 23, 2019 SPEAG Data Acquisition Electronics DAE3 577 Sep. 25, 2017 Sep. 24, 2018 SPEAG Audio Magnetic Calibration Coil AMCC 1049 NCR NCR SPEAG Audio Measuring Instrument AMMI 1041 NCR NCR Gencom Thermometer TE1 TM685-1 Mar. 16, 2018 Mar. 15, 2019 R&S Base Station CMW500 115793 May. 24, 2018 May. 23, 2019 SPEAG Test Arch Phantom N/A N/A NCR NCR SPEAG Phone Positoiner N/A N/A NCR NCR Note: 1. NCR: “No-Calibration Required” TEL : 886-3-327-3456 Page : 14 of 21 FAX : 886-3-328-4978 Issued Date : Oct. 05, 2018 Form version: 180516

HAC T-COIL TEST REPORT Report No. : HA872506-03B 9. T-Coil testing for OTT VoIP Application General Notes: 1. According to the ANSI C63.19 2011 section 7.3.2, test middle channel of each frequency band for HAC testing for each orientation to determine worst HAC T-Coil rating. 2. The google Duo VoIP and WFC application are pre-installed on this device. According to KDB 285076 D02, all air interfaces via a data connection with VoIP application need to be considered HAC testing. 3. The Google Duo only support OPUS audio codec and support 6Kbps to 75Kbps bitrate. 4. The test setup used for OTT VoIP call is the DUT connect to the CMW500 and via the data application unit on CMW500 connection to the Internet, the Auxiliary EUT is connected to the WiFi access point, the channel/Modulation/Frequency bands/data rate is configured on the CMW500 for the DUT unit. For the Auxiliary VoIP unit which is used to configure the audio codec rate and determine the audio input level of -20dBm0 based on the KDB 285076 D02v03 requirement. 5. Codec Investigation: For a voice service/air interface, investigate the variations of codec configurations (WB, NB bit rate) and document the parameters (ABM1, ABM2, S+N/N, frequency response) for that voice service. It is only necessary to document this for one channel/band, the following tests results which the worst case codec would be remarked to be used for the testing for the handset. 6. Air Interface Investigation: a. Use the worst-case codec test and document a limited set of bands/channel/bandwidths. Observe the effect of changing the band and bandwidth to ensure that there are no unexpected variations. Using the knowledge of the observed variations, it is necessary to report only a set band/channel/bandwidth for each orientation for a voice service/air interface. b. Select LTE FDD / TDD one frequency band to do measurement at the worst SNR position was additionally performed with varying the BWs/Modulations/RB size to verify the variation to find out worst configuration , the observed variation is very little to be within 1 dB which is much less than the margin from the rating threshold. c. The TDD LTE supports uplink-downlink configuration 0 to 6 for this device, an investigation was performed to determine the worst-case uplink-downlink configuration to be used for the testing for the handset. d. Select WLAN 2.4GHz and WLAN 5GHz one frequency band to do measurement at the worst SNR position was additionally performed with varying the BWs/Modulations/data rate to verify the variation to find out worst configuration , the observed variation is very little to be within 1 dB which is much less than the margin from the rating threshold. e. There are three battery option, for RF Emission is selected battery1 as the main test, others battery option choose worst air interface to be tested. <Codec Investigation> EDGE Google Duo WFC Calling Band / Codec Opus Opus Opus G.711 G.711 Orientation G.729 G.722 GSM Channel 6kbps 40kbps 75kbps a-Law u-Law ABM 1 -8.03 -9.13 -11.23 -9.9 -7.48 -10.75 -10.46 -7.83 (dBA/m) ABM 2 -34.47 -36.44 -36.72 -36.76 -33.98 -36.29 -37.88 -33.58 (dBA/m) GSM850 / Signal Axial 189 Quality 26.44 27.31 25.49 26.86 26.5 25.54 27.42 25.75 (dB) Freq. Pass Pass Pass Pass Pass Pass Pass Pass Response Remark: According to codec investigation, the worst codec bitrate is Opus 75kbps TEL : 886-3-327-3456 Page : 15 of 21 FAX : 886-3-328-4978 Issued Date : Oct. 05, 2018 Form version: 180516

HAC T-COIL TEST REPORT Report No. : HA872506-03B HSPA Google Duo WFC Calling Band / Codec Opus Opus Opus G.711 G.711 Orientation G.729 G.722 GSM Channel 6kbps 40kbps 75kbps a-Law u-Law ABM 1 -5.4 -4.93 -7.38 -5.39 -4.77 -5.57 -5.15 -5.47 (dBA/m) ABM 2 -45 -45.3 -46.84 -45 -45.38 -46.25 -45.02 -45.36 (dBA/m) UMTS B2 / Signal Axial 9400 Quality 39.6 40.37 39.46 39.61 40.61 40.68 39.87 39.89 (dB) Freq. Pass Pass Pass Pass Pass Pass Pass Pass Response Remark: According to codec investigation, the worst codec bitrate is Opus 75kbps LTE FDD Google Duo WFC Calling Band / Codec Opus Opus Opus G.711 G.711 Orientation G.729 G.722 GSM Channel 6kbps 40kbps 75kbps a-Law u-Law ABM 1 -8.14 -8.34 -8.74 -6.1 -6.22 -6.18 -6.18 -6.17 (dBA/m) ABM 2 -47.08 -47.11 -45.2 -46.7 -46.87 -46.94 -47.1 -46.95 (dBA/m) B12 / 10M / Signal Axial 23095 Quality 38.94 38.77 36.46 40.6 40.65 40.76 40.92 40.78 (dB) Freq. Pass Pass Pass Pass Pass Pass Pass Pass Response Remark: According to codec investigation, the worst codec bitrate is Opus 75kbps LTE TDD Google Duo WFC Calling Band / Codec Opus Opus Opus G.711 G.711 Orientation G.729 G.722 GSM Channel 6kbps 40kbps 75kbps a-Law u-Law ABM 1 -12.34 -11.27 -10.43 -10.07 -11.58 -11.56 -11.57 -11.59 (dBA/m) ABM 2 -43.74 -43.65 -41.55 -41.82 -43.73 -43.76 -43.67 -43.8 (dBA/m) B41 / 20M / Signal Axial 40620 Quality 31.4 32.38 31.12 31.75 32.15 32.2 32.1 32.21 (dB) Freq. Pass Pass Pass Pass Pass Pass Pass Pass Response Remark: According to codec investigation, the worst codec bitrate is Opus 75kbps TEL : 886-3-327-3456 Page : 16 of 21 FAX : 886-3-328-4978 Issued Date : Oct. 05, 2018 Form version: 180516

HAC T-COIL TEST REPORT Report No. : HA872506-03B <Air Interface Investigation> Signal BW RB RB UL-DL ABM1 ABM2 Air Interface Modulation Channel Quality (MHz) Size offset Configuration dB (A/m) dB (A/m) dB LTE B25 20 QPSK 1 0 26340 - -8.75 -45.43 36.68 LTE B25 20 QPSK 50 0 26340 - -7.29 -45.12 37.83 LTE B25 20 QPSK 100 0 26340 - -7.39 -45.09 37.70 LTE B25 20 16QAM 1 0 26340 - -7.65 -45.23 37.58 LTE B25 20 64QAM 1 0 26340 - -7.79 -44.59 36.80 FDD LTE B25 15 QPSK 1 0 26340 - -7.92 -44.61 36.69 LTE B25 10 QPSK 1 0 26340 - -7.59 -44.73 37.14 LTE B25 5 QPSK 1 0 26340 - -8.08 -44.77 36.69 LTE B25 3 QPSK 1 0 26340 - -8.09 -44.95 36.86 LTE B25 1.4 QPSK 1 0 26340 - -7.71 -45.11 37.40 LTE B41 20 QPSK 1 0 40620 0 -11.19 -42.21 31.02 LTE B41 20 QPSK 50 0 40620 0 -11.19 -42.48 31.29 LTE B41 20 QPSK 100 0 40620 0 -11.11 -42.73 31.62 LTE B41 20 16QAM 1 0 40620 0 -11.11 -42.66 31.55 LTE B41 20 64QAM 1 0 40620 0 -11.22 -42.54 31.32 LTE B41 15 QPSK 1 0 40620 0 -11.16 -42.81 31.65 LTE B41 10 QPSK 1 0 40620 0 -11.13 -42.77 31.64 TDD LTE B41 5 QPSK 1 0 40620 0 -10.99 -42.48 31.49 LTE B41 20 QPSK 1 0 40620 1 -11.12 -42.66 31.54 LTE B41 20 QPSK 1 0 40620 2 -11.16 -42.47 31.31 LTE B41 20 QPSK 1 0 40620 3 -11.04 -42.40 31.36 LTE B41 20 QPSK 1 0 40620 4 -10.77 -42.59 31.82 LTE B41 20 QPSK 1 0 40620 5 -11.11 -42.57 31.46 LTE B41 20 QPSK 1 0 40620 6 -11.29 -42.54 31.25 TEL : 886-3-327-3456 Page : 17 of 21 FAX : 886-3-328-4978 Issued Date : Oct. 05, 2018 Form version: 180516

HAC T-COIL TEST REPORT Report No. : HA872506-03B WLAN Google Duo WFC Calling Band / Codec Opus Opus Opus G.711 G.711 Orientation G.729 G.722 GSM Channel 6kbps 40kbps 75kbps a-Law u-Law ABM 1 -3.87 -3.52 -7.41 -5.95 -4.6 -4.04 -4.27 -4.11 (dBA/m) ABM 2 -35.1 -35.3 -38.63 -37.85 -36.57 -36.29 -36.53 -36.44 (dBA/m) WLAN2.4G Signal Axial /6 Quality 31.23 31.78 31.22 31.9 31.97 32.25 32.26 32.33 (dB) Freq. Pass Pass Pass Pass Pass Pass Pass Pass Response Remark: According to codec investigation, the worst codec bitrate is Opus 75kbps <Air Interface Investigation> Signal ABM1 ABM2 Frequency Bands Modulation Bandwidth Data Rate Channel Quality dB (A/m) dB (A/m) dB 802.11b 20 1M 6 -7.43 -37.74 30.31 802.11b 20 11M 6 -5.82 -37.88 32.06 802.11g 20 6M 6 -6.12 -37.72 31.60 802.11g 20 54M 6 -6.52 -37.40 30.88 802.11n-HT20 20 MCS0 6 -6.05 -37.39 31.34 802.11n-HT20 20 MCS7 6 -6.62 -37.35 30.73 WLAN 2.4GHz 802.11an-HT40 40 MCS0 6 -7.30 -37.72 30.42 802.11an-HT40 40 MCS7 6 -6.34 -37.04 30.70 802.11ac-VHT20 20 MCS0 6 -6.11 -37.22 31.11 802.11ac-VHT20 20 MCS8 6 -6.54 -37.41 30.87 802.11ac-VHT40 40 MCS0 6 -6.34 -37.03 30.69 802.11ac-VHT40 40 MCS8 6 -6.29 -37.06 30.77 802.11a 20 6M 40 -13.05 -46.88 33.83 802.11a 20 54M 40 -11.73 -46.87 35.14 802.11an-HT20 20 MCS0 40 -12.08 -47.02 34.94 802.11an-HT20 20 MCS7 40 -12.35 -46.73 34.38 802.11an-HT40 40 MCS0 38 -12.58 -46.79 34.21 802.11an-HT40 40 MCS7 38 -12.97 -46.96 33.99 WLAN 5GHz 802.11ac-VHT20 20 MCS0 40 -12.53 -46.77 34.24 802.11ac-VHT20 20 MCS8 40 -12.26 -47.00 34.74 802.11ac-VHT40 40 MCS0 38 -12.20 -46.86 34.66 802.11ac-VHT40 40 MCS8 38 -12.11 -46.76 34.65 802.11ac-VHT80 80 MCS0 50 -12.40 -46.47 34.07 802.11ac-VHT80 80 MCS8 50 -11.79 -46.77 34.98 TEL : 886-3-327-3456 Page : 18 of 21 FAX : 886-3-328-4978 Issued Date : Oct. 05, 2018 Form version: 180516

HAC T-COIL TEST REPORT Report No. : HA872506-03B Freq. ABM1 ABM2 Signal Ambient Plot Ant Probe T Response Frequency Air Interface Mode Channel Battery dB dB Quality Noise No. Status Position Rating Variation Response (A/m) (A/m) dB dB (A/m) dB Axial (Z) -11.23 -36.72 25.49 T3 -50.31 1 GSM850 EDGE 2 Tx Slots 189 Battery 1 - 0.97 Pass Transversal (Y) -17.10 -38.17 21.07 T3 -50.28 Axial (Z) -11.26 -38.81 27.55 T3 -50.37 2 GSM850 EDGE 2 Tx Slots 189 Battery 2 - 0.74 Pass Transversal (Y) -14.77 -40.04 25.27 T3 -50.27 Axial (Z) -8.15 -35.68 27.53 T3 -50.32 3 GSM850 EDGE 2 Tx Slots 189 Battery 3 - 0.68 Pass Transversal (Y) -15.44 -39.84 24.40 T3 -50.24 Axial (Z) -7.98 -38.11 30.13 T4 -50.35 4 GSM1900 EDGE 2 Tx Slots 661 Battery 1 - 1.19 Pass Transversal (Y) -16.93 -43.62 26.69 T3 -50.29 Axial (Z) -7.38 -46.84 39.46 T4 -50.34 5 WCDMA II HSPA 9400 Battery 1 - 0.72 Pass Transversal (Y) -16.54 -48.53 31.99 T4 -50.26 Axial (Z) -6.91 -45.14 38.23 T4 -50.36 6 WCDMA IV HSPA 1413 Battery 1 - 0.85 Pass Transversal (Y) -15.45 -46.87 31.42 T4 -50.21 Axial (Z) -6.71 -44.25 37.54 T4 -50.31 7 WCDMA V HSPA 4182 Battery 1 - 0.63 Pass Transversal (Y) -16.44 -48.69 32.25 T4 -50.19 Axial (Z) -9.21 -43.76 34.55 T4 -50.34 8 LTE Band 7 20M_QPSK_1_0 21100 Battery 1 - 1.16 Pass Transversal (Y) -16.61 -47.52 30.91 T4 -50.23 Axial (Z) -8.74 -45.20 36.46 T4 -50.36 9 LTE Band 12 10M_QPSK_1_0 23095 Battery 1 - 1.03 Pass Transversal (Y) -16.05 -46.99 30.94 T4 -50.23 Axial (Z) -7.81 -43.02 35.21 T4 -50.34 10 LTE Band 13 10M_QPSK_1_0 23230 Battery 1 - 1.15 Pass Transversal (Y) -16.92 -47.41 30.49 T4 -50.24 Axial (Z) -7.44 -42.39 34.95 T4 -50.31 11 LTE Band 14 10M_QPSK_1_0 23330 Battery 1 - 1.03 Pass Transversal (Y) -16.62 -46.92 30.30 T4 -50.21 Axial (Z) -8.16 -45.30 37.14 T4 -50.37 12 LTE Band 25 20M_QPSK_1_0 26340 Battery 1 - 1.07 Pass Transversal (Y) -17.41 -47.43 30.02 T4 -50.21 Axial (Z) -8.04 -43.60 35.56 T4 -50.33 13 LTE Band 26 15M_QPSK_1_0 26865 Battery 1 - 1.26 Pass Transversal (Y) -17.09 -47.15 30.06 T4 -50.22 Axial (Z) -8.20 -45.16 36.96 T4 -50.36 14 LTE Band 66 20M_QPSK_1_0 132322 Battery 1 - 1.08 Pass Transversal (Y) -16.73 -47.83 31.10 T4 -50.26 Axial (Z) -10.43 -41.55 31.12 T4 -50.38 15 LTE Band 41 20M_QPSK_1_0 40620 Battery 1 - 1.05 Pass Transversal (Y) -16.41 -42.81 26.40 T3 -50.27 Axial (Z) -7.41 -38.63 31.22 T4 -50.23 16 WLAN2.4GHz 802.11b 1Mbps 6 Battery 1 Ant 1 0.82 Pass Transversal (Y) -17.11 -44.92 27.81 T3 -50.26 Axial (Z) -11.80 -40.43 28.63 T3 -50.34 17 WLAN2.4GHz 802.11b 1Mbps 6 Battery 1 Ant 2 0.37 Pass Transversal (Y) -16.56 -42.29 25.73 T3 -50.28 Axial (Z) -12.11 -46.20 34.09 T4 -50.24 18 WLAN5GHz 802.11a 6Mbps 40 Battery 1 Ant 1 0.49 Pass Transversal (Y) -16.69 -44.66 27.97 T3 -50.30 Axial (Z) -13.24 -45.28 32.04 T4 -50.20 19 WLAN5GHz 802.11a 6Mbps 60 Battery 1 Ant 1 0.81 Pass Transversal (Y) -16.08 -44.01 27.93 T3 -50.22 Axial (Z) -13.91 -45.27 31.36 T4 -50.25 20 WLAN5GHz 802.11a 6Mbps 124 Battery 1 Ant 1 1.08 Pass Transversal (Y) -16.87 -43.88 27.01 T3 -50.24 Axial (Z) -13.50 -45.50 32.00 T4 -50.26 21 WLAN5GHz 802.11a 6Mbps 157 Battery 1 Ant 1 0.78 Pass Transversal (Y) -16.48 -44.15 27.67 T3 -50.28 Axial (Z) -12.64 -46.15 33.51 T4 -50.26 22 WLAN5GHz 802.11a 6Mbps 40 Battery 1 Ant 2 0.96 Pass Transversal (Y) -17.21 -43.89 26.68 T3 -50.22 Axial (Z) -12.62 -46.24 33.62 T4 -50.26 23 WLAN5GHz 802.11a 6Mbps 60 Battery 1 Ant 2 0.86 Pass Transversal (Y) -16.63 -43.74 27.11 T3 -50.31 Axial (Z) -13.13 -46.16 33.03 T4 -50.28 24 WLAN5GHz 802.11a 6Mbps 124 Battery 1 Ant 2 1.09 Pass Transversal (Y) -16.41 -43.30 26.89 T3 -50.25 Axial (Z) -12.83 -46.11 33.28 T4 -50.28 25 WLAN5GHz 802.11a 6Mbps 157 Battery 1 Ant 2 0.66 Pass Transversal (Y) -16.15 -43.67 27.52 T3 -50.25 Remark: 1. Phone Condition: Mute on; Backlight off; Max Volume 2. The detail frequency response results please refer to appendix A. 3. Test Engineer：Tom Jiang TEL : 886-3-327-3456 Page : 19 of 21 FAX : 886-3-328-4978 Issued Date : Oct. 05, 2018 Form version: 180516

HAC T-COIL TEST REPORT Report No. : HA872506-03B 10. Uncertainty Assessment The evaluation of uncertainly by the statistical analysis of a series of observations is termed a Type A evaluation of uncertainty. The evaluation of uncertainty by means other than the statistical analysis of a series of observation is termed a Type B evaluation of uncertainty. Each component of uncertainty, however evaluated, is represented by an estimated standard deviation, termed standard uncertainty, which is determined by the positive square root of the estimated variance. The combined standard uncertainty of the measurement result represents the estimated standard deviation of the result. It is obtained by combining the individual standard uncertainties of both Type A and Type B evaluation using the usual “root-sum-squares” (RSS) methods of combining standard deviations by taking the positive square root of the estimated variances. Expanded uncertainty is a measure of uncertainty that defines an interval about the measurement result within which the measured value is confidently believed to lie. It is obtained by multiplying the combined standard uncertainty by a coverage factor. For purpose of this document, a coverage factor two is used, which corresponds to confidence interval of about 95 %. The DASY uncertainty Budget is showed in Table 8.2. Uncertainty Standard Standard Probability Ci Ci Error Description Value Divisor Uncertainty Uncertainty Distribution (ABM1) (ABM2) (±%) (ABM1) (ABM2) Probe Sensitivity Reference Level 3.0 Normal 1 1 1 ± 3.0 % ± 3.0 % AMCC Geometry 0.4 Rectangular √3 1 1 ± 0.2 % ± 0.2 % AMCC Current 1.0 Rectangular √3 1 1 ± 0.6 % ± 0.6 % Probe Positioning During 0.1 Rectangular √3 1 1 ± 0.1 % ± 0.1 % Calibrate Noise Contribution 0.7 Rectangular √3 0.0143 1 ± 0.0 % ± 0.4 % Frequency Slope 5.9 Rectangular √3 0.1 1 ± 0.3 % ± 3.5 % Probe System Repeatability / Drift 1.0 Rectangular √3 1 1 ± 0.6 % ± 0.6 % Linearity / Dynamic Range 0.6 Rectangular √3 1 1 ± 0.4 % ± 0.4 % Acoustic Noise 1.0 Rectangular √3 0.1 1 ± 0.1 % ± 0.6 % Probe Angle 2.3 Rectangular √3 1 1 ± 1.4 % ± 1.4 % Spectral Processing 0.9 Rectangular √3 1 1 ± 0.5 % ± 0.5 % Integration Time 0.6 Normal 1 1 5 ± 0.6 % ± 3.0 % Field Disturbation 0.2 Rectangular √3 1 1 ± 0.1 % ± 0.1 % Test Signal Reference Signal Spectral 0.6 Rectangular √3 0 1 ± 0.0 % ± 0.4 % Response Positioning Probe Positioning 1.9 Rectangular √3 1 1 ± 1.1 % ± 1.1 % Phantom Thickness 0.9 Rectangular √3 1 1 ± 0.5 % ± 0.5 % EUT Positioning 1.9 Rectangular √3 1 1 ± 1.1 % ± 1.1 % External Contributions RF Interference 0.0 Rectangular √3 1 0.3 ± 0.0 % ± 0.0 % Test Signal Variation 2.0 Rectangular √3 1 1 ± 1.2 % ± 1.2 % Combined Standard Uncertainty ± 4.1 % ± 6.1 % Coverage Factor for 95 % K=2 Expanded Uncertainty ± 8.1 % ± 12.3 % Table 8.2 Uncertainty Budget of audio band magnetic measurement TEL : 886-3-327-3456 Page : 20 of 21 FAX : 886-3-328-4978 Issued Date : Oct. 05, 2018 Form version: 180516

HAC T-COIL TEST REPORT Report No. : HA872506-03B 11. References [1] ANSI C63.19-2011, “American National Standard for Methods of Measurement of Compatibility between Wireless Communications Devices and Hearing Aids”, 27 May 2011. [2] FCC KDB 285076 D01v05, “Equipment Authorization Guidance for Hearing Aid Compatibility”, Sep 2017 [3] FCC KDB 285076 D02v03, “Guidance for performing T-Coil tests for air interfaces supporting voice over IP (e.g., LTE and WiFi) to support CMRS based telephone services”, Sep 2017 [4] FCC KDB 285076 D03v01, “Hearing aid compatibility frequently asked questions”, Sep 2017 [5] SPEAG DASY System Handbook TEL : 886-3-327-3456 Page : 21 of 21 FAX : 886-3-328-4978 Issued Date : Oct. 05, 2018 Form version: 180516


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