WU300AS smart phone Test Report I18Z62006-SEM03_T-coil_Rev2_Part3 WIKO

WIKO smart phone

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[1]      ANSI—C63.19—2007
         American National Standard for Methods of Measurement of Compatibility between Wireless
         Communications Devices and Hearing Aids.
[2]      ANSI—C63.19—2011
         American National Standard, Methods of Measurement of Compatibility between Wireless
         Communications Devices and Hearing Aids.
(3]      DASYS5 manual, Chapter: Hearing Aid Compatibility (HAC) T—Coil Extension

Description of the AM1D probe

      The AM1ID Audio Magnetic Field Probe is a fully shielded magnetic field probe for the frequency
      range from 100 Hz to 20 kHz. The pickup coil is compliant with the dimensional requirements of
      [1+2]. The probe includes a symmetric low noise amplifier for the signal available at the shielded
      3 pin connector at the side. Power is supplied via the sameconnector (phantom power supply}
      and monitored via the LED near the connector. The 7 pin connector at the end of the probe does
      not carry any signals, but determines the angle of the sensor when mounted on the DAE. The
      probe supports mechanical detection of the surface.
      The single sensor in the probe is arranged in a tilt angle allowing measurement of 3 orthogonal
      field components when rotating the probe by 120° around its axis. It is aligned with the
      perpendicular component of the field, if the probe axis is tilted nominally 35.3° above the
      measurement plane, using the connector rotation and sensor angle stated below.
      The probe is fully RF shielded when operated with the matching signal cable {shielded) and
      allows measurement of audio magnetic fields in the close vicinity of RF emitting wireless devices
      according to [1+2] without additional shielding.

Handling of the item

      The probe is manufactured from stainless steel. In order to maintain the performance and
      calibration of the probe, it must not be opened. The probe is designed for operation in air and
      shall not be exposed to humidity or liquids. For proper operation of the surface detection and
      emergency stop functions in a DASY system, the probe must be operated with the special probe
      cup provided (larger diameter).

Methods Applied and Interpretation of Parameters

1     Coordinate System: The AM1D probe is mounted in the DASY system for operation with a HAC
      Test Arch phantom with AMCC Helmholtz calibration coll according to [3], with the tip pointing to
      "southwest" orientation.
=     Functional Test: The functional test preceding calibration includes test of
      Noise level
      RF immunity {1kHZz AM modulated signal). The shield of the probe cable must be well connected.
      Frequency response verification from 100 Hz to 10 kHz.
«     Connector Rotation: The connector at the end of the probe does not carry any signals and is used
      for fixation to the DAE only. The probe is operated in the center of the AMCC Helmholtz coil using a
      1 kHz magnetic field signal. Its angle is determined from the two minima at nominally +120° and —
      120° rotation, so the sensor in the tip of the probe is aligned to the vertical plane in z—direction,
      corresponding to the fie!ld maximum in the AMCC Helmholtz calibration coil.
«     Sensor Angle: The sensor tilting in the vertical plane from the ideal vertical direction is determined
      from the two minima at nominally +120° and —120°. DASY system uses this angle to align the
      sensor for radial measurements to the x and y axis in the horizontal plane.
Sensitivity: With the probe sensor aligned to the z—field in the AMCC, the output of the probe is
        compared to the magnetic field in the AMCC at 1 kHz. The field in the AMCC Helmholtz colil is
        given by the geometry and the current through the coil, which is monitored on the precision
        shunt resistor of the coll.

Certificate No: AM1DV2—1064_Jul18                    Page 2 of 3

AM1TD probe identification and configuration data

    Item                       | AM1DV2 Audio Magnetic 1D Field Probe                _                                     |
    Type No                    | SP AMi 001 AF                                   A                                         |
   _Serial No                  | 1064                                                                                      |

                                    2096 mm
                                    6.0 mm (at
                                        mm (centre   sensor

   | Manufacturer / Origin     _ | Schmid & Partner Engineering AG, Zurich, Switzerland

Calibration data

Connector rotation angle        (in DASY system)         101.8 °                         +/— 3.6 ° (k=2)

Sensor angle                    (in DASY system)         0.52 °                          +/— 0.5 ° (Kk=2)

Sensitivity at 1 kHz            (in DASY system}         0.0657 V / (A/m)                +/— 2.2 % (k=2)

 The reported uncertainty of measurement is stated as the standard uncertainty of measurement
 multiplied by the coverage factor k=2, which for a normal distribution corresponds to a coverage
 probability of approximately 95%.

Certificate No: AM1DV2—1064_Jul18                    Page 3 of 3

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                                          No. I18Z62006-SEM03
                                              Page 143 of 148


                                      ©Copyright. All rights reserved by CTTL.

      §     Laboratory of
Schmid & Partner
  Engineering AG
                                                            Ee o
                                                                  I IEE":
                                                                                           Schweizerischer Kalibrierdienst
                                                                                           Service suisse d‘étalonnage
                                                                                           Servizio svizzero di taratura
Zeughausstrasse 43, 8004 Zurich, Switzerland                +— ///\\\ o               S    Swiss Calibration Service
                                                               * An|uls 3

Accredited by the Swiss Accreditation Service (SAS)                                    Accreditation No.: SCS 0108
The Swiss Accreditation Service is one of the signatories to the EA
Multilateral Agreement for the recognition of calibration certificates

DAE                          data acquisition electronics
Connector angle              information used in DASY system to align probe sensor X to the robot
                             coordinate system.

Methods Applied and Interpretation of Parameters
   e DC Voltage Measurement: Calibration Factor assessed for use in DASY system by
     comparison with a calibrated instrument traceable to national standards. The figure given
     corresponds to the full scale range of the voltmeter in the respective range.
    e    Connector angle: The angle of the connector is assessed measuring the angle
         mechanically by a tool inserted. Uncertainty is not required.
    e    The following parameters as documented in the Appendix contain technical information as a
         result from the performance test and require no uncertainty.
         e     DC Voltage Measurement Linearity: Verification of the Linearity at +10% and —10% of
               the nominal calibration voltage. Influence of offset voltage is included in this
         e     Common mode sensitivity: Influence of a positive or negative common mode voltage on
               the differential measurement.
         e     Channel separation: Influence of a voltage on the neighbor channels not subject to an
               input voltage.
         e     AD Converter Values with inputs shorted: Values on the internal AD converter
               corresponding to zero input voltage
         e     input Offset Measurement. Output voltage and statistical results over a large number of
               zero voltage measurements.
         e     input Offset Current: Typical value for information; Maximum channel input offset
               current, not considering the input resistance.
         e     input resistance: Typical value for information: DAE input resistance at the connector,
               during internal auto—zeroing and during measurement.
         e     Low Battery Alarm Voltage: Typical value for information. Below this voltage, a battery
               alarm signal is generated.
         e     Power consumption: Typical value for information. Supply currents in various operating

Certificate No: DAE4—1555_Aug18                                 Page 2 of 5

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DC Voltage Measurement
   A/D — Converter Resolution nominal
       High Range:          1LSB       6.1uV ,       full range =   —100...+300 mV
       Low Range:           1LSB =      6inV ,       full range=    —1.......+3mV
   DASY measurement parameters: Auto Zero Time: 3 sec; Measuring time: 3 sec

      Calibration Factors |           x           [ oY                   |           z7        O|
     High Range           | 404.540 £ 0.02% (k=2) | 404.077£0.02% (k=2) | 405.028 + 0.02% (k=2) |
      Low Range           | 8.92000 + 1.50% (k=2) | 3.94558 £1.50% (k=2) | 3.97891 + 1.50% (k=2) |

Connector Angle

    I Connector Angle to be used in DASY system      |                    I        104.0 "°€1 ®

Certificate No: DAFE4—1555_Aug18                   Page 3 of 5

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                                                                                                                          c —                                     202

 Appendix (Additional assessments outside the scope of SCS0108)

 1. DC Voltage Linearity                                                                                            |             e
         High Range                                 Reading (uV)             Difference (uV)                Error (%)
        |\ Channel X     + Input                     199994.32                     ~1.11                    —0.00                      _
        Channel X        + Input                     20004.21                      2,.27                    0.01
        Channel X        — Input                     —19994.21                     6.72                     —0.03
         Channel Y       + Input                     199991.01                     ~4,74                    —0.00
         Channel Y       + Input                      19999.15                     -2_.66                   —0.01
         Channel Y¥      —Input _                    —19999.37                     1.70                     —0.01
         Channel Z       + Input                     199997.50                      1{.46                  0.00
         Channel Z       + Input                      19998.75                     —3.06               —=—0.02
        Channel Z        —Input                      —20003.08                     1.96                      0.01

            Low Range                               Reading (uV)       |     Difference (uV)                Error (%)
         Channel X       + Input                      2001.23                      —0.12                    —0.01
         Channel X       + Input                       201.73                      0.03                      0.02                         |
         Channel X       — Input                      ~197.79                      0.32                     —0.16
         Channel Y       + Input                      2001,22                      0.00                      0.00
         Channel Y       + Input                       201.15                      —0.62                    —0.31
         Channel Y       — Input                      198.47                       —0.28                     0.14
            Channel Z    + Input                      2001.41                      0.23                      0.01
            Channel Z    + Input                       200.99                      —0.67                    —0.33

            Channel Z    — Input                      ~199,42                      ~1.11                     0.56

    2. Common mode sensitivity
       DASY measurement parameters: Auto Zero Time: 3 sec; Measuring time: 3 sec
                          | Common mode                              High Range                         Low Range                              .
                               Input Voltage (mV)          Average Reading (uV)                  Average Reading (uV)

        Channel X          '                 200                       —10.02                            ~11.33
        K                                   — 200                          12.53                         10.76
        Channe! Y                            200                           10.66                         10.4Q
                                            — 200                      —12.33                            —12.29 |
        Channe! Z2                           200                           —2.18                          —2.52
                                            — 200                          0.20                           —0.09

    3. Channel separation
        DASY measurementparameters: Auto Zero Time: 3 sec; Measuring time: 3 sec
                               Input Voltage (mV)      Channel X (uV) | Channel Y (uV)                 Channel Z (uV)
        Channel X                     200                        ~                    —0.85                   —2.68
        Channel Y                     200                   8.65                        —                     0.04
        Channel Z                     200                   610 _                     6.93                      —
    Certificate No: DAE4—1555_Aug18                              Page 4 of 5

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4. AD—Converter Values with inputs shorted
   DASY measurement parameters: Auto Zero Time: 3 sec; Measuring time: 3 sec

                                                             High Range (LSB)                          Low Range (LSB)

    Channel X                                                        15635                                   14959

    Channel Y                                                        15850                                   16040

    Channe! Z                                                        16635                                   16604

5. Input Offset Measurement
   DASY measurement parameters: Auto Zero Time: 3 sec; Measuring time: 3 sec
   Input 10MQ
                           Average (uV)                min. Offset {uV)           max. Offset (uV)            Sid. [():J;atlon

    Channel X                   0.40                           —0.72                    1.60                         0.48
    Channel Y                   0.06                           —0.99                    1.84                         0.46
    Channel Z                   —0.76                          ~2.17                   0.18                          0.48

6. Input Offset Current
    Nominal Input circuitry offset current on all channels: <25fA

7. Input Resistance (Typical values for information)
                                        !                   Zeroing (kOhm)                            Measuring (MOhm)
    Channel X                                                       200                                       200.
    Channel Y                                                       200                                       200
    Channel Z                               i                       200                    ;                  200

8. Low Battery Alarm Voltage (Typical valuesfor information)
   | Typical values                                     | Alarm Level (VDC)                                                                       |
   | Supply (+ VeCc)                                    I                                      +7.9                                               I
   | Supply (— Veoc)                                    I                                      —7.6                                               I

9. Power Consumption (Typical values for information)                                                                                             f
   ITypical values |                                Switched off (mA¥) I Stand by (mA) I                   Transmitting (mA)                      |
   | Supply (+ VcC)                             |    s +0.01                  I       +6               |            +14                           |
   | Supply (— Ve¢)                             |           ~0.01         |   |       —8               I             —9                           I

Certificate No: DAE4—1555_Aug18                                     Page 5 of 5

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                                                 No. I18Z62006-SEM03
                                                     Page 148 of 148

The photos of HAC test are presented in the additional document:

Appendix to test report no. I18Z62006-SEM02/03

The photos of HAC test

                                            ©Copyright. All rights reserved by CTTL.

Document Created: 2019-03-23 08:32:05
Document Modified: 2019-03-23 08:32:05
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Document TitleI18Z62006-SEM03_T-coil_Rev2_Part3