TC57HO Touch computer Test Report Zebra Technologies

Zebra Technologies Touch computer

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         HAC T-COIL TEST REPORT                                                          Report No. : HA941118B




         HEARING AID COMPATIBILITY
            T-COIL TEST REPORT
                       FCC ID            : UZ7TC57HO
                       Equipment         : Touch Computer
                       Brand Name : Zebra
                       Model Name : TC57HO
                       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 Apr. 14, 2019 and testing was started from Apr. 15, 2019 and
      completed on Apr. 17, 2019. 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.)




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              HAC T-COIL TEST REPORT                                                                                                          Report No. : HA941118B

                                                                Table of Contents
1.  Attestation of Test Results ........................................................................................................................................ 4
2.  General Information ................................................................................................................................................... 5
3.  Testing Location......................................................................................................................................................... 7
4.  Applied Standards ..................................................................................................................................................... 7
5.  Air Interface and Operating Mode............................................................................................................................. 8
6.  Measurement standards for T-Coil ........................................................................................................................... 9
    6.1     Frequency Response ....................................................................................................................................... 9
    6.2     T-Coil Signal Quality Categories ....................................................................................................................... 9
7. T-Coil Test Procedure ...............................................................................................................................................10
    7.1     Test Flow Chart................................................................................................................................................ 11
    7.2     Test Setup Diagram .........................................................................................................................................12
    7.3     Description of EUT Test Position .....................................................................................................................14
8. Test Equipment List ..................................................................................................................................................15
9. T-Coil testing for CMRS IP Voice .............................................................................................................................16
    9.1     VoWiFi Tests Results .......................................................................................................................................16
10. Uncertainty Assessment ..........................................................................................................................................18
11. References .................................................................................................................................................................19

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




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FAX : 886-3-328-4978                                                                                                                  Issued Date : Apr. 19, 2019
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         HAC T-COIL TEST REPORT                                       Report No. : HA941118B


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

       HA941118B       Rev. 01    Initial issue of report                     Apr. 19, 2019




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          HAC T-COIL TEST REPORT                                                               Report No. : HA941118B

1. Attestation of Test Results
                                                                              Frequency                 Magnetic
     Air Interface           Band MHz                T-Rating
                                                                              Response                   Intensity
                               2450                    T4                       Pass                       Pass
                               5200                    T4                       Pass                       Pass
       VoWiFi                  5300                    T4                       Pass                       Pass
                               5500                    T4                       Pass                       Pass
                               5800                    T4                       Pass                       Pass
     Date Tested                                            2019/4/15 ~ 2019/4/17
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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FAX : 886-3-328-4978                                                                      Issued Date : Apr. 19, 2019
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         HAC T-COIL TEST REPORT                                                                   Report No. : HA941118B
2. General Information
                                           Product Feature & Specification
Applicant Name               Zebra Technologies Corporation
Equipment Name               Touch Computer
Brand Name                   Zebra
Model Name                   TC57HO
FCC ID                       UZ7TC57HO
HW Version                   MV
SW Version                   01-17-25.00-OG-U00-PRD
FW Version                   FUSION_QA_2_1.4.0.006_O
MFD                          19JAN19
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 66: 1710.7 MHz ~ 1779.3 MHz
                             LTE Band 38: 2572.5 MHz ~ 2617.5 MHz
                             LTE Band 41: 2498.5 MHz ~ 2687.5 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
Remark:
1.  Enable VoWiFi function to evaluation T-Rating, other air interface evaluation in original report, FCC ID:
    UZ7TC57HO, Report No.: HA882724B.
2.  The M-rating is primarily influenced by the air interface, in this C2PC filing there is no any hardware or radio change
    is made, so it would not impact RF characteristic and M rating, therefore HAC RF testing is not required. The
    previous M-rating report(FCC ID: UZ7TC57HO, Report No.: HA882724A) already be resubmitted and as an
    appendix D in this C2PC filing.




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            HAC T-COIL TEST REPORT                                                                    Report No. : HA941118B

                                                   Specification of Accessories
         Adapter             Brand Name             Zebra            Part Number                PWR-WUA5V12W0US
         Battery 1           Brand Name             Zebra            Part Number                    BT-000314-50
         Battery 2           Brand Name             Zebra            Part Number                    BT-000314-01
        USB cable            Brand Name             Zebra            Part Number                 CBL-TC51-USB1-01
     Headset Jumper 1        Brand Name             Zebra            Part Number                CBL-TC51-HDST25-01
     Headset Jumper 2        Brand Name             Zebra            Part Number                CBL-TC51-HDST35-01
     2.5mm Earphone          Brand Name             Zebra            Part Number                HDST-25MM-PTVP-01
     3.5mm Earphone          Brand Name             Zebra            Part Number                HDST-35MM-PTVP-01
       Exoskeleton           Brand Name             Zebra            Part Number                  SG-TC51-EX01-01
     Trigger Handle 1        Brand Name             Zebra            Part Number                 TRG-TC51-SNP1-01
       Soft Holster          Brand Name             Zebra            Part Number                SG-TC51-HLSTR1-01
        Hand strap           Brand Name             Zebra            Part Number                SG-TC51-BHDSTP1-03
      USB-C Adaptor          Brand Name             Zebra            Part Number                ADPTR-TC56-USBC-01
     USB Type C cable        Brand Name             Zebra            Part Number                         N/A

Remark:
1.     There are two battery options, for T-coil evaluation is selected battery1 as the main test, battery2 choose worst air
       interface to be tested.




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            HAC T-COIL TEST REPORT                                                            Report No. : HA941118B


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. : HA941118B
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                                                                        Google Duo(1)
                                    VD           Yes                  WLAN, BT                      /                No
               EDGE1900                                                                          WFC(1,2)
                   850                                                WLAN, BT                                       No
                  1750              VO           Yes                  WLAN, BT                 CMRS Voice            No
 UMTS             1900                                                WLAN, BT                                       No
                                                                                               Google Duo(1)
                  HSPA              VD           Yes                  WLAN, BT                      /                No
                                                                                                 WFC(1,2)
                 Band 2                                               WLAN, BT                                       No
                 Band 4                                               WLAN, BT                                       No
                 Band 5                                               WLAN, BT                                       No
                 Band 7                                               WLAN, BT                                       No
                                                                                                 VoLTE
                 Band 12                                              WLAN, BT                      /                No
   LTE
                 Band 13            VD           Yes                  WLAN, BT                 Google Duo(1)         No
  (FDD)
                 Band 14                                              WLAN, BT                      /                No
                                                                                                 WFC(1,2)
                 Band 17                                              WLAN, BT                                       No
                 Band 25                                              WLAN, BT                                       No
                 Band 26                                              WLAN, BT                                       No
                 Band 66                                              WLAN, BT                                       No
                                                                                                 VoLTE
                 Band 38                                              WLAN, BT                      /                No
   LTE
                                    VD           Yes                                           Google Duo(1)
  (TDD)
                 Band 41                                              WLAN, BT                      /                No
                                                                                                 WFC(1,2)
                  2450                                                                                               No
                                                                                               Google Duo(1)
                  5200                                                                              /                No
  Wi-Fi           5300              VD           Yes              GSM,WCDMA,LTE                  WFC(1,2)            No
                  5500                                                                              /                No
                                                                                                VoWiFi(1)
                  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.




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         HAC T-COIL TEST REPORT                                                             Report No. : HA941118B
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. : HA941118B
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. : HA941118B
7.1 Test Flow Chart




                       Fig. 2 T-Coil Signal Test flowchart




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       HAC T-COIL TEST REPORT                                                         Report No. : HA941118B
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 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.




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            HAC T-COIL TEST REPORT                                                                     Report No. : HA941118B
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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FAX : 886-3-328-4978                                                                             Issued Date : Apr. 19, 2019
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       HAC T-COIL TEST REPORT                                                                Report No. : HA941118B
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. : HA941118B
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. 20, 2018    Nov. 19, 2019
   SPEAG                Data Acquisition Electronics       DAE4           778         May. 25, 2018    May. 24, 2019
   SPEAG                Data Acquisition Electronics       DAE4           918         Jun. 20, 2018    Jun. 19, 2019
   SPEAG               Audio Magnetic Calibration Coil     AMCC           1049            NCR                 NCR
   SPEAG                Audio Measuring Instrument         AMMI           1041            NCR                 NCR
  RCPTWN                       Thermometer                 HTC-1        TM685-1       Nov. 12, 2018    Nov. 11, 2019
   SPEAG                    Test Arch Phantom               N/A           N/A             NCR                 NCR
   SPEAG                      Phone Positioner              N/A           N/A             NCR                 NCR
     R&S                        Base Station              CMW500         115793       May. 24, 2018    May. 23, 2019
Note:
1. NCR: “No-Calibration Required”




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FAX : 886-3-328-4978                                                                  Issued Date : Apr. 19, 2019
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               HAC T-COIL TEST REPORT                                                                                Report No. : HA941118B
    9. T-Coil testing for CMRS IP Voice
    9.1 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 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.
       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 EVS SWB       EVS SWB      EVS WB    EVS WB       EVS NB        EVS NB                   Band /
 Codec                                                                                                                        Orientation
            4.75Kbps   6.60Kbps    12.2Kbps   23.85Kbps 9.6Kbps     128Kbps      5.9Kbps   128Kbps      5.9Kbps      24.4Kbps                 Channel
  ABM 1
              4.88        4          5.03       3.98      4.63           4.94      4.66     4.97            4.98       4.95
 (dBA/m)
  ABM 2
             -39.26     -36.96      -37.91     -38.77     -38.98     -38.27       -38.64    -38.41          -38.07    -37.96
 (dBA/m)
                                                                                                                                              2.4GHz
  Signal                                                                                                                          Axial
                                                                                                                                              WLAN / 6
  Quality    44.14      40.96       42.94       42.75     43.61          43.21     43.3     43.38           43.05      42.91
   (dB)
   Freq.
             Pass        Pass        Pass       Pass      Pass           Pass     Pass      Pass            Pass       Pass
Response
    Remark: According to codec investigation, the worst codec is WB AMR 6.60Kbps


    <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                4.58             -37.00          41.58
                                 802.11b           20              11M              6                4.61             -37.74          42.35
                                 802.11g           20              6M               6                4.67             -37.59          42.26
                                 802.11g           20             54M               6                4.63             -38.05          42.68
       WLAN 2.4GHz
                              802.11n-HT20         20             MCS0              6                4.44             -37.44          41.88
                              802.11n-HT20         20             MCS7              6                4.58             -37.11          41.69
                              802.11n-HT40         40             MCS0              6                4.66             -37.29          41.95
                              802.11n-HT40         40             MCS7              6                4.59             -37.70          42.29
                              802.11a              20              6M              40                4.58             -36.85          41.43
                              802.11a              20             54M              40                4.65             -36.97          41.62
                           802.11an-HT20           20             MCS0             40                4.76             -37.59          42.35
                           802.11an-HT20           20             MCS7             40                4.74             -37.46          42.20
                           802.11an-HT40           40             MCS0             38                4.68             -36.76          41.44
                           802.11an-HT40           40             MCS7             38                4.75             -36.95          41.70
         WLAN 5GHz
                          802.11ac-VHT20           20             MCS0             40                4.74             -37.55          42.29
                          802.11ac-VHT20           20             MCS8             40                4.67             -37.15          41.82
                          802.11ac-VHT40           40             MCS0             38                4.75             -37.07          41.82
                          802.11ac-VHT40           40             MCS8             38                4.57             -36.89          41.46
                          802.11ac-VHT80           80             MCS0             50                4.75             -36.97          41.72
                          802.11ac-VHT80           80             MCS8             50                4.63             -37.02          41.65



    TEL : 886-3-327-3456                                                                                               Page : 16 of 19
    FAX : 886-3-328-4978                                                                                        Issued Date : Apr. 19, 2019
    Form version: 180516


              HAC T-COIL TEST REPORT                                                                    Report No. : HA941118B

                                                                                                    Ambient  Freq.
                                                                          ABM1 ABM2 Signal
Plot                                        Ant                 Probe                          T     Noise Response Frequency
     Air Interface      Mode     Channel          Battery                   dB    dB Quality
No.                                        Status              Position                      Rating   dB    Variation Response
                                                                          (A/m) (A/m)   dB
                                                                                                     (A/m)     dB
                                                             Axial (Z)     4.00 -36.96 40.96  T4     50.35
 1    WLAN2.4GHz 802.11b 1Mbps      6      Ant 1 Battery1                                                       2       Pass
                                                          Transversal (Y) -5.09 -44.27 39.18  T4     50.25
                                                               Axial (Z)    3.85 -38.35 42.20     T4   -50.38
 2     WLAN5GHz 802.11a 6Mbps      40      Ant 1 Battery1                                                         1.97       Pass
                                                            Transversal (Y) -5.06 -45.01 39.95    T4   -50.24
                                                               Axial (Z)    3.77 -37.87 41.64     T4   -50.36
 3     WLAN5GHz 802.11a 6Mbps      60      Ant 1 Battery1                                                           2        Pass
                                                            Transversal (Y) -5.19 -44.84 39.65    T4   -50.22
                                                               Axial (Z)    3.63 -38.35 41.98     T4   -50.37
 4     WLAN5GHz 802.11a 6Mbps      116     Ant 1 Battery1                                                           2        Pass
                                                            Transversal (Y) -4.79 -44.61 39.82    T4   -50.23
                                                               Axial (Z)    3.48 -38.57 42.05     T4   -50.37
 5     WLAN5GHz 802.11a 6Mbps      157     Ant 1 Battery1                                                           2        Pass
                                                            Transversal (Y) -4.62 -44.94 40.32    T4   -50.26
                                                               Axial (Z)   -1.18 -41.26 40.08     T4   -50.32
 6    WLAN2.4GHz 802.11b 1Mbps      6      Ant 2 Battery1                                                           2        Pass
                                                            Transversal (Y) -10.79 -47.37 36.58   T4   -50.23
                                                               Axial (Z)    3.94 -39.06 43.00     T4   -50.33
 7    WLAN2.4GHz 802.11b 1Mbps      6      Ant 2 Battery2                                                           2        Pass
                                                            Transversal (Y) -5.33 -45.04 39.71    T4   -50.22
                                                               Axial (Z)    3.62 -38.72 42.34     T4   -50.36
 8     WLAN5GHz 802.11a 6Mbps      40      Ant 2 Battery1                                                           2        Pass
                                                            Transversal (Y) -4.76 -45.24 40.48    T4   -50.25
                                                               Axial (Z)    3.64 -38.67 42.31     T4   -50.34
 9     WLAN5GHz 802.11a 6Mbps      60      Ant 2 Battery1                                                           2        Pass
                                                            Transversal (Y) -4.90 -44.91 40.01    T4   -50.23
                                                               Axial (Z)   -1.26 -40.80 39.54     T4   -50.34
10     WLAN5GHz 802.11a 6Mbps      116     Ant 2 Battery1                                                           2        Pass
                                                            Transversal (Y) -10.81 -48.07 37.26   T4   -50.22
                                                               Axial (Z)   -1.44 -39.87 38.43     T4   -50.35
11     WLAN5GHz 802.11a 6Mbps      157     Ant 2 Battery1                                                           2        Pass
                                                            Transversal (Y) -10.74 -47.79 37.05   T4   -50.21



         Remark:
          1. Phone Condition: Mute on; Backlight off; Max Volume
          2. The detail frequency response results please refer to appendix A.
          3. Test Engineer:Nick Yu




     TEL : 886-3-327-3456                                                                                 Page : 17 of 19
     FAX : 886-3-328-4978                                                                          Issued Date : Apr. 19, 2019
     Form version: 180516


          HAC T-COIL TEST REPORT                                                                 Report No. : HA941118B
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 : 18 of 19
FAX : 886-3-328-4978                                                                        Issued Date : Apr. 19, 2019
Form version: 180516


         HAC T-COIL TEST REPORT                                                     Report No. : HA941118B

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 : 19 of 19
FAX : 886-3-328-4978                                                           Issued Date : Apr. 19, 2019
Form version: 180516



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Document Modified: 2019-05-07 02:24:20
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