Test Report HAC T-Coil

FCC ID: 2AJOTTA1140

Test Report

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         HAC T-COIL TEST REPORT                                                         Report No. : HA8O1133B




         HEARING AID COMPATIBILITY
            T-COIL TEST REPORT
                FCC ID             : 2AJOTTA1140
                Equipment          : Smart Phone
                Brand Name         : NOKIA
                Model Name         : TA1140, TA1141
                T-Rating           : T4
                Applicant    : HMD Global Oy
                               Bertel Jungin aukio 9, 02600 Espoo, Finland
                Manufacturer : HMD Global Oy
                               Bertel Jungin aukio 9, 02600 Espoo, Finland
                Standard     : FCC 47 CFR §20.19
                               ANSI C63.19-2011


      The product was received on Oct. 16, 2018 and testing was started from Nov. 06, 2018 and
      completed on Nov. 12, 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 INTERNATIONAL INC. EMC & Wireless Communications Laboratory
                       No. 52, Huaya 1st Rd., Guishan Dist., Taoyuan City, Taiwan (R.O.C.)




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             HAC T-COIL TEST REPORT                                                                                                            Report No. : HA8O1133B

                                                                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 CMRS Voice ..................................................................................................................................14
      9.1     GSM Tests Results ..........................................................................................................................................14
      9.2     UMTS Tests Results ........................................................................................................................................15
10.   T-Coil testing for CMRS IP Voice .............................................................................................................................16
      10.1 VoLTE Tests Results ........................................................................................................................................16
      10.2 VoWiFi Tests Results .......................................................................................................................................18
11.   T-Coil testing for OTT VoIP Application ..................................................................................................................19
12.   Uncertainty Assessment ..........................................................................................................................................21
13.   References .................................................................................................................................................................22

Appendix A. Plots of T-Coil Measurement
Appendix B. DASY Calibration Certificate
Appendix C. Test Setup Photos




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         HAC T-COIL TEST REPORT                                       Report No. : HA8O1133B


                        History of this test report
       Report No.      Version                     Description                Issued Date

       HA8O1133B       Rev. 01    Initial issue of report                    Nov. 20, 2018




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          HAC T-COIL TEST REPORT                                                               Report No. : HA8O1133B

1. Attestation of Test Results
                                                                              Frequency                 Magnetic
     Air Interface           Band MHz                T-Rating
                                                                               Response                 Intensity
                              GSM850                   T4                        Pass                     Pass
  GSM CMRS Voice
                             GSM1900                   T4                        Pass                     Pass
                             EDGE850                   T4                        Pass                     Pass
   OTT over EDGE
                            EDGE1900                   T4                        Pass                     Pass
                              Band 2                   T4                        Pass                     Pass
  UMTS CMRS Voice             Band 4                   T4                        Pass                     Pass
                              Band 5                   T4                        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
        VoLTE
                              Band 12                  T4                        Pass                     Pass
                              Band 14                  T4                        Pass                     Pass
                              Band 30                  T4                        Pass                     Pass
    OTT over LTE              Band 14                  T4                        Pass                     Pass
       VoWiFI                  2450                    T4                        Pass                     Pass
    OTT over WiFi              2450                    T4                        Pass                     Pass
     Date Tested                                            2018/11/06 ~ 2018/11/12
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




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         HAC T-COIL TEST REPORT                                                Report No. : HA8O1133B
2. General Information
                                        Product Feature & Specification
Applicant Name         HMD Global Oy
Equipment Name         Smart Phone
Brand Name             NOKIA
Model Name             TA1140, TA1141
FCC ID                 2AJOTTA1140
HW Version             3.0
SW Version             00N0_1_300
EUT Stage              Identical Prototype
Date Tested            2018/11/08
                       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
Frequency Band         LTE Band 4: 1710.7 MHz ~ 1754.3 MHz
                       LTE Band 5: 824.7 MHz ~ 848.3 MHz
                       LTE Band 12: 699.7 MHz ~ 715.3 MHz
                       LTE Band 14: 790.5 MHz ~ 795.5 MHz
                       LTE Band 30: 2307.5 MHz ~ 2312.5 MHz
                       WLAN 2.4GHz Band: 2412 MHz ~ 2462 MHz
                       Bluetooth: 2402 MHz ~ 2480 MHz
                       GSM/GPRS/EGPRS
                       RMC/AMR 12.2Kbps
                       HSDPA
Mode                   HSUPA
                       LTE: QPSK, 16QAM, 64QAM
                       WLAN 2.4GHz : 802.11b/g/n HT20/HT40
                       Bluetooth BR/EDR/LE




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            HAC T-COIL TEST REPORT                                                           Report No. : HA8O1133B


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




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            HAC T-COIL TEST REPORT                                                                Report No. : HA8O1133B
5. Air Interface and Operating Mode
   Air                                         C63.19              Simultaneous               Name of Voice       Power
Interface      Band MHz            Type
                                               Tested                Transmitter                Service          Reduction
                GSM850                                               WLAN, BT                                       No
                                    VO           Yes                                           CMRS Voice
                GSM1900                                              WLAN, BT                                       No
  GSM           EDGE850                                                                       SIP calling(1,2)
                                    VD           Yes                 WLAN, BT                       /               No
               EDGE1900                                                                       Google Duo(1)
                   850                                               WLAN, BT                                       No
                  1750              VO           Yes                 WLAN, BT                  CMRS Voice           No
 UMTS             1900                                               WLAN, BT                                       No
                                                                                              SIP calling(1,2)
                  HSPA              VD           Yes                 WLAN, BT                       /               No
                                                                                              Google Duo(1)
                 Band 2                                              WLAN, BT                                       No
                 Band 4                                              WLAN, BT                    VoLTE              No
                 Band 5                                              WLAN, BT                       /               No
   LTE
                                    VD           Yes                                          SIP calling(1,2)
  (FDD)          Band 12                                             WLAN, BT                                       No
                                                                                                    /
                 Band 14                                             WLAN, BT                 Google Duo(1)         No
                 Band 30                                             WLAN, BT                                       No
                                                                                                VoWiFi(1)
                                                                                                    /
  Wi-Fi           2450              VD           Yes          GSM,WCDMA,CDMA,LTE              SIP calling(1,2)      No
                                                                                                    /
                                                                                              Google Duo(1)
   BT              2450               DT             No           GSM,WCDMA,CDMA,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 SIP calling is android internal auxiliary functions under the dialing program.




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         HAC T-COIL TEST REPORT                                                             Report No. : HA8O1133B
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




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         HAC T-COIL TEST REPORT                                                                Report No. : HA8O1133B
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.




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       HAC T-COIL TEST REPORT                                     Report No. : HA8O1133B
7.1 Test Flow Chart




                       Fig. 2 T-Coil Signal Test flowchart




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       HAC T-COIL TEST REPORT                                                            Report No. : HA8O1133B
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
   - CDMA input level: -18dBm0
   - 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 and -18dBm0
   for CDMA. 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 SIP Calling 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.




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            HAC T-COIL TEST REPORT                                                                    Report No. : HA8O1133B
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




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       HAC T-COIL TEST REPORT                                                                Report No. : HA8O1133B
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




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           HAC T-COIL TEST REPORT                                                                                      Report No. : HA8O1133B
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                 Audio Magnetic 1D Field Probe             AM1DV3              3067             Dec. 12, 2017           Dec. 11, 2018
     SPEAG                  Data Acquisition Electronics              DAE4               854              Jun. 14, 2018           Jun. 13, 2019
     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”




9. T-Coil testing for CMRS Voice
General Note:
1. 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 worst investigation codec would be remarked to be
   used for the testing for the handset.
2. 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. 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.


9.1 GSM Tests Results
<Codec Investigation>
           Codec                        FR_V1                        HR_V1                      Orientation                 Band / Channel

      ABM 1 (dBA/m)                     15.89                        16.32

      ABM 2 (dBA/m)                     -19.17                       -20.84
                                                                                                  Axial                     GSM850 / 189
     Signal Quality (dB)                35.06                        37.16

      Freq. Response                     Pass                        Pass
Remark: According to codec investigation, the worst codec is FR_V1


<Air Interface Investigation>
                                                                                                         Freq.
                                                                     ABM1 ABM2 Signal         Ambient
Plot                                                   Probe                             T             Response Frequency
     Air Interface          Mode       Channel                        dB    dB Quality         Noise
No.                                                   Position                         Rating          Variation Response
                                                                     (A/m) (A/m) dB           dB (A/m)
                                                                                                          dB
                                                      Axial (Z)      16.32 -20.84      37.16      T4          -50.30
 1       GSM850             Voice        189                                                                               1.86         Pass
                                                   Transversal (Y)    7.35    -32.25   39.60      T4          -50.26
                                                      Axial (Z)      14.75 -24.45      39.20      T4          -50.35
 2      GSM1900             Voice        661                                                                               1.84         Pass
                                                   Transversal (Y)    7.84    -31.87   39.71      T4          -50.28




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FAX : 886-3-328-4978                                                                                            Issued Date : Nov. 20, 2018
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      HAC T-COIL TEST REPORT                                                                                     Report No. : HA8O1133B
9.2 UMTS Tests Results
<Codec Investigation>
         Codec           AMR 4.75Kbps              AMR 7.95Kbps            AMR 12.2Kbps            Orientation            Band / Channel

     ABM 1 (dBA/m)              8.94                    8.39                   8.64

     ABM 2 (dBA/m)              -33.9                  -34.03                 -32.97
                                                                                                     Axial                Band 2 / 9400
  Signal Quality (dB)        42.84                     42.42                  41.61

     Freq. Response             Pass                    Pass                  Pass
Remark: According to codec investigation, the worst codec is AMR 12.2Kbps




<Air Interface Investigation>
                                                                                                        Freq.
                                                                    ABM1 ABM2 Signal         Ambient
Plot                                                  Probe                             T             Response Frequency
     Air Interface      Mode            Channel                      dB    dB Quality         Noise
No.                                                  Position                         Rating          Variation Response
                                                                    (A/m) (A/m) dB           dB (A/m)
                                                                                                         dB
                                                     Axial (Z)      8.64   -32.97     41.61   T4       -50.33
 3      WCDMA II        Voice            9400                                                                        1            Pass
                                                  Transversal (Y)   6.97   -33.97     40.94   T4       -50.26
                                                     Axial (Z)      7.75   -33.62     41.37   T4       -50.34
 4      WCDMA IV        Voice            1413                                                                       0.8           Pass
                                                  Transversal (Y)   7.78   -33.28     41.06   T4       -50.24
                                                     Axial (Z)      6.93   -34.52     41.45   T4       -50.32
 5      WCDMA V         Voice            4182                                                                       1.17          Pass
                                                  Transversal (Y)   7.52   -33.53     41.05   T4       -50.30




TEL : 886-3-327-3456                                                                                            Page : 15 of 22
FAX : 886-3-328-4978                                                                                     Issued Date : Nov. 20, 2018
Form version: 181113


          HAC T-COIL TEST REPORT                                                                 Report No. : HA8O1133B
10. T-Coil testing for CMRS IP Voice
10.1 VoLTE Tests Results
General Note:
1. 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 worst investigation codec would be remarked to be
   used for the testing for the handset.
2. 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 and the following worst configure would be remarked to be used for the testing for the
        handset.
   b. Select LTE FDD 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 1.5 dB which is much less than the margin from the rating threshold.
   c. 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.




<Codec Investigation>

LTE FDD
                               NB AMR           WB AMR          NB AMR           WB AMR                      Band / BW /
           Codec                                                                            Orientation
                               4.75Kbps         6.60Kbps        12.2Kbps        23.85Kbps                     Channel
      ABM 1 (dBA/m)              13.52             11.6            12.93          9.31

      ABM 2 (dBA/m)               -29.6           -28.6           -28.71         -30.64
                                                                                                              B2 / 20M /
                                                                                                Axial
                                                                                                               18900
     Signal Quality (dB)         43.12            40.2             41.64          39.95

      Freq. Response              Pass            Pass             Pass           Pass
Remark: According to codec investigation, the worst codec is WB AMR 23.85Kbps




TEL : 886-3-327-3456                                                                               Page : 16 of 22
FAX : 886-3-328-4978                                                                        Issued Date : Nov. 20, 2018
Form version: 181113


            HAC T-COIL TEST REPORT                                                                        Report No. : HA8O1133B



<Air Interface Investigation>
                                                                                                                           Signal
                        BW                         RB         RB                        ABM1              ABM2
     Air Interface                   Modulation                          Channel                                           Quality
                       (MHz)                       Size      offset                    dB (A/m)          dB (A/m)
                                                                                                                             dB
       LTE B2           20             QPSK         1          0          18900          9.84              -28.98           38.82
       LTE B2           20             QPSK         50         0          18900          9.86              -29.12          38.98
       LTE B2           20             QPSK        100         0          18900          9.86              -29.33          39.19
       LTE B2           20            16QAM         1          0          18900          9.84              -29.31          39.15
       LTE B2           20            64QAM         1          0          18900          9.83              -29.20          39.03
       LTE B2           15             QPSK         1          0          18900          9.85              -29.10          38.95
       LTE B2           10             QPSK         1          0          18900          9.89              -29.08          38.97
       LTE B2           5              QPSK         1          0          18900          9.85              -29.27          39.12
       LTE B2           3              QPSK         1          0          18900          9.95              -29.37          39.32
       LTE B2           1.4            QPSK         1          0          18900          9.81              -29.29          39.10




                                                                                                  Ambient Freq.
                                                                         ABM1 ABM2 Signal
Plot                BW              RB RB                    Probe                           T     Noise Response Frequency
     Air Interface       Modulation             Channel                   dB    dB Quality
No.                (MHz)            Size offset             Position                       Rating   dB   Variation Response
                                                                         (A/m) (A/m) dB
                                                                                                   (A/m)    dB
                                                             Axial (Z)    9.31 -30.64 39.95     T4     -50.33
 6     LTE Band 2 20M         QPSK      1     0   18900                                                             1.2      Pass
                                                          Transversal (Y) 8.74 -30.87 39.61     T4     -50.23
                                                             Axial (Z)    9.62 -30.29 39.91     T4     -50.34
 7     LTE Band 4 20M         QPSK      1     0   20175                                                             1.24     Pass
                                                          Transversal (Y) 7.89 -31.45 39.34     T4     -50.28
                                                             Axial (Z)   12.35 -27.41 39.76     T4     -50.31
 8     LTE Band 5 10M         QPSK      1     0   20525                                                             1.11     Pass
                                                          Transversal (Y) 9.03 -30.41 39.44     T4     -50.22
                                                             Axial (Z)   13.87 -25.44 39.31     T4     -50.34
 9 LTE Band 12 10M            QPSK      1     0   23095                                                             0.77     Pass
                                                          Transversal (Y) 8.28 -30.91 39.19     T4     -50.23
                                                             Axial (Z)    9.52 -29.86 39.38     T4     -50.35
10 LTE Band 14 10M            QPSK      1     0   23330                                                             0.87     Pass
                                                          Transversal (Y) 7.77 -31.27 39.04     T4     -50.25
                                                             Axial (Z)    9.69 -29.86 39.55     T4     -50.33
11 LTE Band 30 10M            QPSK      1     0   27710                                                             1.19     Pass
                                                          Transversal (Y) 3.81 -35.52 39.33     T4     -50.26




TEL : 886-3-327-3456                                                                                        Page : 17 of 22
FAX : 886-3-328-4978                                                                                 Issued Date : Nov. 20, 2018
Form version: 181113


       HAC T-COIL TEST REPORT                                                                                 Report No. : HA8O1133B
10.2 VoWiFi Tests Results
General Note:
1. 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 worst investigation codec would be remarked
   to be used for the testing for the handset.
2. 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 and the following worst configure would be remarked to be used for the testing for the
        handset.
   b. Select WLAN 2.4GHz 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.
   c. 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.


<Codec Investigation>
                                      NB AMR            WB AMR            NB AMR           WB AMR
            Codec                                                                                         Orientation          Band / Channel
                                      4.75Kbps          6.60Kbps          12.2Kbps        23.85Kbps
       ABM 1 (dBA/m)                    11.83              9.91              11.3            12.01

       ABM 2 (dBA/m)                   -27.97             -27.03             -27            -24.14
                                                                                                                               2.4GHz WLAN /
                                                                                                             Axial
                                                                                                                                     6
      Signal Quality (dB)               39.8              36.94              38.3            36.15

       Freq. Response                   Pass              Pass              Pass             Pass
Remark: According to codec investigation, the worst codec is WB AMR 23.85Kbps


<Air Interface Investigation>
                                                                                                                                   Signal
                                                 BW                                           ABM1             ABM2
Frequency Bands         Air Interface                         Mode            Channel                                              Quality
                                                (MHz)                                        dB (A/m)         dB (A/m)
                                                                                                                                     dB
                            802.11b              20               1M                6            12.94            -22.49            35.43
                            802.11b              20               11M               6            12.94            -22.70            35.64
                            802.11g              20               6M                6            12.91            -22.59            35.50
                            802.11g              20               54M               6            12.99            -22.48            35.47
  WLAN 2.4GHz
                       802.11n-HT20              20           MCS0                  6            12.95            -22.60            35.55
                       802.11n-HT20              20           MCS7                  6            12.90            -22.71            35.61
                       802.11n-HT40              40           MCS0                  6            12.95            -22.67            35.62
                       802.11n-HT40              40           MCS7                  6            12.98            -22.63            35.61



                                                                                                              Freq.
                                                                          ABM1 ABM2 Signal         Ambient
Plot                                                        Probe                             T             Response Frequency
     Air Interface           Mode           Channel                        dB    dB Quality         Noise
No.                                                        Position                         Rating          Variation Response
                                                                          (A/m) (A/m) dB           dB (A/m)
                                                                                                               dB
                                                           Axial (Z)      12.01 -24.14   36.15      T4   -50.37
 12    WLAN2.4G        802.11b 1Mbps             6                                                                         2         Pass
                                                        Transversal (Y)   6.09 -29.46    35.55      T4   -50.27




TEL : 886-3-327-3456                                                                                            Page : 18 of 22
FAX : 886-3-328-4978                                                                                     Issued Date : Nov. 20, 2018
Form version: 181113


             HAC T-COIL TEST REPORT                                                                             Report No. : HA8O1133B
11. 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 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. Due to OTT service and CMRS IP service are all be established over the internet protocol for the voice service,
           and on both services use the identical RF air interface for the WIFI and LTE, therefore according to VoLTE and
           VoWiFi test results of air interface investigation, the worst configuration and frequency band of air interface was
           used for OTT T-Coil testing.
           -LTE FDD worst configuration and band: LTE Band 14/10MHz/QPSK/1RB Size
           -WLAN2.4GHz worst configuration: 802.11b /1Mbps



<Codec Investigation>

EDGE
                          Google Duo                                      SIP Calling
     Codec                  Opus        Opus      AMR NB        GSM       GSM_EFR        PCMA        PCMU        Orientation Band / Channel
               Opus 6kbps
                           40kbps      75kbps    12.2 Kbit/s   13Kbit/s   12.2 Kbit/s   64 Kbit/s   64 Kbit/s
   ABM 1
                 13.67      13.26       12.35       10.89       10.01        10.44       10.47       11.12
  (dBA/m)
   ABM 2
                 -26.43     -23.91     -24.51       -25.59      -24.83      -26.74       -20.98      -24.29
  (dBA/m)
                                                                                                                    Axial    GSM850 / 189
   Signal
                  40.1      37.17       36.86       36.48       34.84        37.18       31.45       35.41
Quality (dB)
    Freq.
                  Pass       Pass       Pass        Pass        Pass         Pass         Pass        Pass
 Response
 Remark: According to codec investigation, the worst codec bitrate is 64 Kbit/s




HSPA
                          Google Duo                                      SIP Calling
     Codec                  Opus        Opus      AMR NB        GSM       GSM_EFR        PCMA        PCMU        Orientation Band / Channel
               Opus 6kbps
                           40kbps      75kbps    12.2 Kbit/s   13Kbit/s   12.2 Kbit/s   64 Kbit/s   64 Kbit/s
   ABM 1
                 11.59       10.9       8.88        10.43        5.08        4.58         9.69        7.51
  (dBA/m)
   ABM 2
                 -30.23     -28.26     -29.99       -25.61      -30.86       -33.3       -25.65      -29.64
  (dBA/m)                                                                                                                     UMTS B2 /
                                                                                                                    Axial
   Signal                                                                                                                       9400
                 41.82      39.16       38.87       36.04       35.94        37.88       35.34       37.15
Quality (dB)
    Freq.
                  Pass       Pass       Pass        Pass        Pass         Pass         Pass        Pass
 Response
 Remark: According to codec investigation, the worst codec bitrate is64 Kbit/s




TEL : 886-3-327-3456                                                                                           Page : 19 of 22
FAX : 886-3-328-4978                                                                                    Issued Date : Nov. 20, 2018
Form version: 181113


              HAC T-COIL TEST REPORT                                                                                             Report No. : HA8O1133B
LTE FDD
                             Google Duo                                               SIP Calling
      Codec                    Opus          Opus      AMR NB           GSM           GSM_EFR          PCMA           PCMU        Orientation Band / Channel
               Opus 6kbps
                              40kbps        75kbps    12.2 Kbit/s      13Kbit/s       12.2 Kbit/s     64 Kbit/s      64 Kbit/s
   ABM 1
                 12.88         13.02        11.26       10.35           10.12           10.38           8.09          10.39
  (dBA/m)
   ABM 2
                 -26.05        -25.88       -27.59       -27.2          -27.48          -27.33         -29.23          -27.4
  (dBA/m)                                                                                                                                      B14 / 10M /
                                                                                                                                     Axial
   Signal                                                                                                                                        23330
                 38.93          38.9        38.85       37.55           37.6            37.71          37.32          37.79
Quality (dB)
    Freq.
                  Pass          Pass         Pass        Pass           Pass             Pass           Pass           Pass
 Response
Remark: According to codec investigation, the worst codec bitrate is 64 Kbit/s


WLAN
                             Google Duo                                               SIP Calling
      Codec                    Opus          Opus      AMR NB           GSM           GSM_EFR          PCMA           PCMU        Orientation Band / Channel
               Opus 6kbps
                              40kbps        75kbps    12.2 Kbit/s      13Kbit/s       12.2 Kbit/s     64 Kbit/s      64 Kbit/s
   ABM 1
                 14.05         13.93         12.3       12.53           12.13           12.39          10.38          12.37
  (dBA/m)
   ABM 2
                 -25.79        -25.95       -27.36      -25.03          -25.09          -25.11          -26.6         -25.01
  (dBA/m)
                                                                                                                                     Axial    WLAN2.4G / 6
   Signal
                 39.84         39.88        39.66       37.56           37.22            37.5          36.98          37.38
Quality (dB)
    Freq.
                  Pass          Pass         Pass        Pass           Pass             Pass           Pass           Pass
 Response
Remark: According to codec investigation, the worst codec bitrate is 64 Kbit/s




<Air Interface Investigation>
                                                                                                       Freq.
                                                                  ABM1 ABM2 Signal          Ambient
Plot                                                       Probe                       T             Response Frequency
     Air Interface           Mode         Channel                  dB     dB Quality         Noise
No.                                                       Position                   Rating          Variation Response
                                                                  (A/m) (A/m)   dB          dB (A/m)
                                                                                                        dB
                                                     Axial (Z)    10.47 -20.98 31.45  T4     -50.35
 13      GSM850           EDGE 2 Tx slots   189                                                        1.59      Pass
                                                  Transversal (Y) 2.52 -30.85 33.37   T4     -50.24
                                                           Axial (Z)        12.51 -24.33            36.84       T4      -50.33
 14      GSM1900          EDGE 2 Tx slots      661                                                                                      2          Pass
                                                       Transversal (Y)         3.91    -33.03       36.94       T4      -50.26
                                                           Axial (Z)           9.69    -25.65       35.34       T4      -50.38
 15     WCDMA II              HSPA            9400                                                                                    1.78         Pass
                                                       Transversal (Y)      -0.04 -35.91            35.87       T4      -50.24
                                                           Axial (Z)           3.00    -30.97       33.97       T4      -50.36
 16     WCDMA IV              HSPA            1413                                                                                      2          Pass
                                                       Transversal (Y)         2.45    -31.51       33.96       T4      -50.25
                                                           Axial (Z)           5.96    -27.64       33.60       T4      -50.33
 17     WCDMA V               HSPA            4182                                                                                    1.62         Pass
                                                       Transversal (Y)         2.45    -32.42       34.87       T4      -50.22
                                                           Axial (Z)           8.09    -29.23       37.32       T4      -50.36
 18    LTE Band 14 10M_QPSK_1_0               23330                                                                                   1.91         Pass
                                                       Transversal (Y)         4.29    -32.69       36.98       T4      -50.25
                                                           Axial (Z)        10.38 -26.60            36.98       T4      -50.37
 19     WLAN2.4G          802.11b 1Mbps         6                                                                                      1.8         Pass
                                                       Transversal (Y)         3.94    -31.23       35.17       T4      -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:San Lin.




TEL : 886-3-327-3456                                                                                                            Page : 20 of 22
FAX : 886-3-328-4978                                                                                                     Issued Date : Nov. 20, 2018
Form version: 181113


          HAC T-COIL TEST REPORT                                                                 Report No. : HA8O1133B
12. 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.
The judgment of conformity in the report is based on the measurement results excluding the measurement
uncertainty.

                                Uncertainty                                                      Standard       Standard
                                  Value         Probability                   Ci       Ci
      Error Description                                           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 : 21 of 22
FAX : 886-3-328-4978                                                                        Issued Date : Nov. 20, 2018
Form version: 181113


         HAC T-COIL TEST REPORT                                                     Report No. : HA8O1133B

13. 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 : 22 of 22
FAX : 886-3-328-4978                                                           Issued Date : Nov. 20, 2018
Form version: 181113



Document Created: 2019-04-15 19:09:48
Document Modified: 2019-04-15 19:09:48

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