HAC TCoil report

FCC ID: V65C5155

Test Report

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FCCID_1783406

                                                                           Applicant:   Kyocera
                                                                            FCC ID:     V65C5155
                                                                           Report #:    CT-C5156-13-0712-R0




                            Hearing Aid Compatibility (HAC)
                                        T-Coil

                                   FCC 47 CFR Part 20.19

                                              Test Report

                                                     For

                                Kyocera Corporation
                          c/o Kyocera Communications, Inc.




              Product:                  Dual-Band CDMA Mobile Phone
               Model:                              C5156



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                                                                                                       Applicant:        Kyocera
                                                                                                        FCC ID:          V65C5155
                                                                                                       Report #:         CT-C5156-13-0712-R0

                                                             TABLE OF CONTENTS


1     SUMMARY OF TESTING .................................................................................................................. 4
2     EQUIPMENT UNDER TEST INFORMATION .................................................................................... 5
3     TEST CONDITIONS .......................................................................................................................... 6
    3.1      Test Facilities ............................................................................................................................. 6
    3.2      Ambient Conditions .................................................................................................................... 6
    3.3      RF characteristics of the test site ................................................................................................ 6
    3.4      Ambient Noise of the test site ..................................................................................................... 6
    3.5      Test Signal, Frequencies and Output Power............................................................................... 7
    3.6      EUT Operating Conditions .......................................................................................................... 8
4     DESCRIPTION OF TEST EQUIPMENT ............................................................................................ 8
    4.1      Test Equipment Used ................................................................................................................. 8
    4.2      T-Coil Measurement System ...................................................................................................... 9
    4.3      Audio Magnetic Probe .............................................................................................................. 10
    4.4      Audio Magnetic Measuring Instrument (AMMI) ......................................................................... 10
    4.5      Audio Magnetic Calibration Coil (AMCC) .................................................................................. 10
5     SYSTEM VALIDATION & CALIBRATION ...................................................................................... 11
    5.1      Input Channel Calibration ......................................................................................................... 11
    5.2      Probe Calibration ...................................................................................................................... 12
    5.3      Reference Input Level .............................................................................................................. 13
6     DESCRIPTION OF TEST PROCEDURE......................................................................................... 14
    6.1      Test Positions ........................................................................................................................... 15
    6.2      Audio Signals ........................................................................................................................... 15
    6.3      Scan Procedures ...................................................................................................................... 17
7     DESCRIPTION OF TEST PROCEDURE......................................................................................... 18
8     T-COIL REQUIREMENTS AND CATEGORY ................................................................................. 19
    8.1      RF Emissions ........................................................................................................................... 19
    8.2      Axial Field Intensity................................................................................................................... 19
    8.3      Signal Quality ........................................................................................................................... 19
    8.4      Frequency Response ............................................................................................................... 20
9     T-COIL TEST RESULTS ................................................................................................................. 21
    9.1      Field Strength and Signal Quality ............................................................................................. 21
    9.2      Frequency Response ............................................................................................................... 22
10        Appendix A1: Ambient Noise Plots, 800 MHz .......................................................................... 24
11        Appendix A2: Ambient Noise Plots, 1900 MHz ........................................................................ 25
12        Appendix B: System Calibration Results ................................................................................. 26
13        Appendix C: ABM and SNR Test Results/Plots ....................................................................... 26
14        Appendix D: Probe Calibration Certificate ............................................................................... 26
15        Appendix E: Photo Test Setup .................................................................................................. 26


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                                                                           Applicant:   Kyocera
                                                                            FCC ID:     V65C5155
                                                                           Report #:    CT-C5156-13-0712-R0



                                             ATTESTATION

  The tested device complies with the requirements in respect of all parameters subject to the test.
  The test results and statements relate only to the items tested.
  The test equipment used was suitable for the tests performed and within manufacturer’s published
  specifications and operating parameters.
  The test methods were consistent with the methods described in the relevant standards.

                           Product: Dual-Band CDMA Mobile Phone with Bluetooth and WLAN

                           Model #: C5156

                            FCC ID: V65C5155

      Tested in accordance with: FCC 47 CFR Part 20.19
                                 ANSI C63.19-2007
               Test Requested by: KYOCERA Corporation
                                  C/o KYOCERA Communications, Inc.
                                  8611 Balboa Ave.
                                  San Diego, CA 92123 United States
               Test performed by: Comptest Services LLC

                      Date of Test: July 11 – July12, 2012




    Responsible Engineer                                            Reviewed and approved by:



    Benjamin Nguyen
    Benjamin Nguyen                                                 Tammy To
    Test Engineer                                                   Quality Manager




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                                                                            Applicant:   Kyocera
                                                                             FCC ID:     V65C5155
                                                                            Report #:    CT-C5156-13-0712-R0



1       SUMMARY OF TESTING

                                            ANSI C63.19 (2007)
                                             Section 6 T-coil
    Mode     Test                                               Test Results         T-Rating        Verdict
             Min. Axial Field Strength, dB A/m
    CDMA     Min. Radial Field Strength, dB A/m
     800-
    BC10     Min. Signal Quality (ABM1/ABM2), dB
             Frequency Response @ Axial position
             Min. Axial Field Strength, dB A/m                      -0.28                 --          Pass
  CDMA       Min. Radial Field Strength, dB A/m                     -9.27                 --          Pass
 800-BC0     Min. Signal Quality (ABM1/ABM2), dB                    48.05                 4           Pass
             Frequency Response @ Axial position                      --                  --          Pass
             Min. Axial Field Strength, dB A/m                      -0.69                 --          Pass
    CDMA     Min. Radial Field Strength, dB A/m                     -9.59                 --          Pass
    1900     Min. Signal Quality (ABM1/ABM2), dB                    47.64                 4           Pass
             Frequency Response @ Axial position                      --                  --          Pass
                                        Overall T-Rating:                            T4
                                                M-Rating*:                           M4
                                  HAC Category Rating:                             M4, T4
* M-rating obtained from HAC RF report.




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                                                                            Applicant:   Kyocera
                                                                             FCC ID:     V65C5155
                                                                            Report #:    CT-C5156-13-0712-R0



2       EQUIPMENT UNDER TEST INFORMATION

                     Product: Dual-Band CDMA Mobile Phone with Bluetooth and WLAN
                      FCC ID: V65C5155
              Model Number: C5156
        EUT Serial Number: 268435457816727799
                         Type: [ ] Identical Prototype, [X] Pre-Production, [ ] Production
           Device Category:       Portable
RF Exposure Environment: General Population / Uncontrolled
                     Antenna: Internal                                             Detachable:       No
              External Input: Audio/Digital Data
                     Quantity: Quantity production is planned
                        Mode:            CDMA                       CDMA                       CDMA
                                   1X & EvDo Rev0, A          1X & EvDo Rev0, A          1x & EvDo Rev0, A
                        Band:             BC-10                      BC-0                       BC-1
       TX Frequency (MHz):                   N/A                 824.7 - 848.3               1850 -1910




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                                                                           Applicant:   Kyocera
                                                                            FCC ID:     V65C5155
                                                                           Report #:    CT-C5156-13-0712-R0



3         TEST CONDITIONS


    3.1 Test Facilities
    The test sites and measurement facilities used to collect data are located at 8611 Balboa Avenue,
    San Diego, CA 92123, USA


 3.2       Ambient Conditions
    All tests were performed under the following environmental conditions:
    Ambient Temperature:                          23 ± 2 Degrees C
    Relative Humidity (RH):                       0% <RH < 80%
    Atmospheric Pressure:                         101.3kPa + 10 to –5 kPa


    3.3    RF characteristics of the test site
    All HAC measurements were performed inside a shielded room that provide isolation from external
    EM fields, with the RF ambient at least 20 dB below the intended measurement limits.


    3.4    Ambient Noise of the test site
    All HAC measurements were performed inside a shielded room that provide isolation from external
    EM fields, with the RF ambient at least 20 dB below the intended measurement limits. The test
    site’s ambient magnetic level were determined and found to be at least 10dB below the
    measurement data ABM2, unless a very low level of AMB2. Measurement of the ambient level was
    performed for each probe orientation and results are shown in Appendix B.




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                                                                            Applicant:    Kyocera
                                                                             FCC ID:      V65C5155
                                                                            Report #:     CT-C5156-13-0712-R0



 3.5       Test Signal, Frequencies and Output Power
   The device supports CDMA2000 in 1X (Phase I, Protocol revision 6) mode. CDMA2000 1X includes
   TIA/EIA-95B as a subset and was approved for publishing in July 1999. It provides voice and data
   capabilities within a standard 1.25 MHz CDMA channel. This RF bandwidth is identical to the legacy
   IS-95 B system standard.

   Maximum average conducted powers were measured to ensure worst case power configuration was
   tested:
     CONFIGURATION                                   CONDUCTED POWER (dBm)
           (Full Rate)             CDMA 800-BC10               CDMA 800- BC0                     CDMA 1900
                                 Ch       Ch       Ch        Ch      Ch        Ch         Ch        Ch        Ch
                                 476      580      684      1013     384       777        25        600      1175
    SO3      RC1                                           24.70    24.80    24.84       24.59     24.63     24.84
             RC3                                           24.68    24.85    24.70       24.58     24.71     24.69
    SO17     RC2                                           24.70    24.75    24.74       24.69     24.78     24.83
             RC54                                          24.70    24.75    24.70       24.68     24.79     24.79

   In all operating modes, the phone was set to rate maximum RF power level and the measurements
   were performed on low, mid and high channels.

   The measurement system measures power drift during HAC testing by comparing E/H-field in the
   same location at the beginning and at the end of measurement. These records were used to monitor
   stability of power output during tests. Conducted RF power measurements were also performed
   before and after each HAC measurements to confirm the output power.

   During tests, the EUT was put in in-call mode and controlled by a CDMA simulator to generate the
   required signal and power:

                     Protocol:                        6 (IS-2000)
                     Radio Configuration:             3
                     Power Control:                   All Up Bits
                     Service Option:                  3
                     Vocoder:                         8K Enhanced (low)
                     Data Rate:                       Full




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                                                                           Applicant:   Kyocera
                                                                            FCC ID:     V65C5155
                                                                           Report #:    CT-C5156-13-0712-R0



    3.6    EUT Operating Conditions
    The EUT was tested with the follow configurations and conditions, if applicable:

                X Fully charged standard battery as supplied with the handset
                   Closed configurations at ear use position1
                   Both retracted and extended antenna positions
                X Back-light always ON
                X LCD Contrast High
                   Simultaneous transmission with Bluetooth transmitter ON 2
                X Receiver volume setting at maximum
                X Microphone muted
    Note
    1: This device has only one configuration for ear usage
    2: The Bluetooth transmitter was not enabled during tests, since the intended use of the CDMA
    transmitter does not include support simultaneous operation when held to ear.




4         DESCRIPTION OF TEST EQUIPMENT

    4.1    Test Equipment Used
    Below is a list of the calibrated equipment used for the measurements.
    The calibration certificates of Probe and Helmholtz Coil are attached in Appendix A.
    Description                       Manufacturer               Model             Serial          Cal Due
                                                                Number            Number            Date
    Power Meter                           Giga-tronics           8541C           1831306          02/24/13
    Radio Communication Tester        Rohde & Schwarz           CMU200            101328          05/16/13
    Data Acquisition                         Speag               DAE4               675           05/23/13
    Audio Band Magnetic Probe                Speag              AM1DV2             1045           09/15/12
    Audio Band Magnetic                      Speag               AMMI              1035              N/A
    Measuring Instrument
    Helmholtz Coil                           Speag               AMCC              1001              N/A
    Test Arch                                Speag                HAC              1015              N/A




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                                                                           Applicant:    Kyocera
                                                                            FCC ID:      V65C5155
                                                                           Report #:     CT-C5156-13-0712-R0



 4.2       T-Coil Measurement System
   The measurements were performed with Dasy4 automated near-field scanning system comprised
   of high precision robot, robot controller, computer, Magnetic probe, probe alignment sensor, non-
   conductive phone positioner, Test Arch and software extension. Figure 5.2 show the setup and
   cabling. The overall expanded uncertainty (K=2) of the measurement system is 12.3%. The
   measurement uncertainty budget is given in section 6.




             Figure 4.2a T-Coil                                                         setup with Helmholtz
                                                          Coil




                                              Figure 4.2b Setup Cabling

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                                                                           Applicant:   Kyocera
                                                                            FCC ID:     V65C5155
                                                                           Report #:    CT-C5156-13-0712-R0



  4.3 Audio Magnetic Probe
   Model:                      AM1D
   Application:                Active single sensor probe for both axial and radial measurement scans
   Construction:               Fully RF shielded
                               Rounded tip of 6 mm diameter incorporating a pickup coil with its center
                                offset 3mm from the tip and the sides
                               Compatible with DAE, with adapted probe cup
   Frequency                   ± 0.5dB of ideal differentiator from 100 Hz to 10 kHz
   Response:
   Linearity:                  < 0.1 dB from 5 dB below limitation to 16 dB above noise level
   Dynamic Range:              Max 21 dB A/m @ 1 kHz, Noise level typ. –70 dB A/m @ 1kHz, ABM2
                                typ. –60 dB A/m
   Sensitivity:                Typ. -24 dBV / A./m @ 1kHz at probe output
   RF Shielding:               Immunity to AM (1 kHz, 80%) modulation RF signal



  4.4 Audio Magnetic Measuring Instrument (AMMI)
   Model:                    AMMI
   Application:             AMMI is a desktop 19-inch unit containing a sampling unit, a waveform
                            generator for test and calibration signals and a USB interface.
   Connection:              Front connectors
                             Audio Out - audio signal to the base station simulator
                             Coil Out - test and calibration signal to the AMCC
                             Coil In - monitor signal from the AMCC BNO connector
                             Probe In - probe signal



  4.5 Audio Magnetic Calibration Coil (AMCC)
   Model:                    AMCC
   Application:             The Audio Magnetic Calibration coil is a Helmholtz Coil designed according
                            to ANSI C63.19-2006 section D.9, for calibration of the AM1D probe. The
                            two horizontal coils generate a homogeneous magnetic field in the z
                            direction. The DC input resistance is adjusted to approximately 50 Ohm by
                            a series resistor, and a shunt resistor of 10 Ohm allows monitoring the
                            current with a scale of 1:10.
   Connection:               Coil In
                             Coil Monitor




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                                                                           Applicant:   Kyocera
                                                                            FCC ID:     V65C5155
                                                                           Report #:    CT-C5156-13-0712-R0



5         SYSTEM VALIDATION & CALIBRATION
At the beginning of the HAC T-coil measurement, a 3-phase calibration was performed per Speag
instruction to ensure accurate measurement of the voltages and ABM field. Reference input level was
also validated and calibrated per C63.19.

    5.1    Input Channel Calibration
    Phase 1: The AMMI audio output was switched off, and a 200 mV_pp symmetric rectangular signal
    of 1 kHz was generated and internally connected directly to both channels of the sampling unit (coil
    in, probe in).

    Phase 2: The AMMI audio output was off, and a 20 mV_pp symmetric 100 Hz signal was internally
    connected.

    The signals during phases 1 and 2 were available at the output on the rear panel of the AMMI. The
    output must however not be loaded in order not to influence the calibration. After the first two
    phases, the two input channels were both calibrated for absolute measurements of voltages. The
    resulting factors were displayed above the multimeter window.

    After phases 1 and 2, the input channels were calibrated to measure exact voltages.




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                                                                           Applicant:   Kyocera
                                                                            FCC ID:     V65C5155
                                                                           Report #:    CT-C5156-13-0712-R0



5.2      Probe Calibration
 Phase 3: a multisine signal covering each third-octave band from 50 Hz to 5 kHz was generated and
 applied to both audio outputs. The probe was positioned in the center of the AMCC (user point “coil
 center”) and aligned in the z-direction, the field orientation of the AMCC. The Coil In channel was
 measuring the voltage over the AMCC internal shunt, which was proportional to the magnetic field in
 the AMCC. At the same time, the probe in channel samples the amplified signal picked up by the
 probe coil. The ratio of the two voltages – in each third-octave filter – leads to the calibration factor of
 the probe over the frequency band of interest for the spectral representation.

 The Coil signal is scaled in dBV, and the Probe signal is normalized to show dBV at a frequency of 1
 kHz. The sensitivity is the ratio at 1 kHz. The frequency response of the probe (subject to an
 integrator) can be calculated from the difference of the two curves.

 The calibration result using a AM1DV2 probe is shown in Appendix B. The internal calibration factors
 of the coil and probe channel are listed. The graphics represent the values (applying the calibration
 factors from the previous steps) for the probe and coil channel in dB V for each third-octave filter from
 100 Hz to 5 kHz. These values are interconnected with a blue line for the probe and a green line for
 the coil channel.

 The probe sensitivity in V / (A/m) at 1 kHz is calculated from the values in the chart. -20 dBV in the coil
 channel corresponds approx. to 1 A/m. The lines are typically horizontal. Deviations around 160 Hz
 typically result from power line interference, and the slight decay at the higher frequency is a result of
 the channel frequency response.


                    Calibration Factors                               Measured Value
                    Probe Sensitivity, V/(A/m)                        0.0655
                    Probe calibration factor, V                       1.1292
                    Coil calibration factor, V                        2.3517




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                                                                           Applicant:    Kyocera
                                                                            FCC ID:      V65C5155
                                                                           Report #:     CT-C5156-13-0712-R0



 5.3       Reference Input Level
   ANSI C63.19 requires the use of reference input level of –18dBm0 that correlate to a normal speech
   input level for CDMA air interface. In order to create the correct level the CMU200 audio codec and
   the AMMI output were calibrated.


   5.3.1 CMU200 Audio Codec Calibration
   To determine the correct input level, the Encoder/Decorder of the CMU200 base station simulator was
   calibrated for measured full-scale input voltage level. The CMU200 0dBm0 input reference was
   determined utilizing the build-in functions of “Decoder Cal” and “Encoder Cal”.


             CMU200 S/N               Modulation                 Ref. I/P Level           Target Level
                 101328                  CDMA                       -18dBm0                  -20.49

                                        Table 5.3a CMU200 Target Level



   5.3.2 AMMI Signal Verification
   Verification of AMMI output level was performed within 24 hours of the compliance measurement. The
   measured results are shown in Table 5.3b


          Date             Signal              Measured AMMI             Target Reference           Delta
                                                  Output                      Input
                                                  (dBm0)                     (dBm0)                 (dB)
                            1KHz                      -20.5                     -20.49              -0.01
        7/11/2012      48k_voice_1kHz                -20.49                     -20.48              -0.01
                    48k_voice_300_3000               -20.49                     -20.49                0

                                        Table 5.3b Measured Output Level




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                                                                           Applicant:   Kyocera
                                                                            FCC ID:     V65C5155
                                                                           Report #:    CT-C5156-13-0712-R0



6       DESCRIPTION OF TEST PROCEDURE

The device was positioned and setup according to ANSI C63.19-2006. Figure 6.0 shows the T-Coil
Signal measurement flowchart:


                   Confirm calibration of Test Equipment
                   Configure and validate test setup
                   Establish WD reference level
                   Find measurement locations




                       Position and orient probe
                       Measure desired audio band signal strength
                       Measure undesired audio band signal strength
            

                   Calculate signal strength
                   Calculate signal quality
                   Measure frequency response (axial)




                                      All 3 locations
                                       measured?
                                                                  No

                                                 Yes

                                  Intensity and response
                                        compliant ?
                                                                  No

                                                 Yes
                Determine and record signal quality category                  Done



                                  Figure 6.0 T-Coil measurement flowchart




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                                                                           Applicant:   Kyocera
                                                                            FCC ID:     V65C5155
                                                                           Report #:    CT-C5156-13-0712-R0



 6.1 Test Positions
   The device was placed on a non-conductive phone positioner under the Test Arch. The acoustic
   output of the EUT was aligned with the center point of the area formed by the dielectric wire and the
   middle bar of the arch’s top frame. Please refer to Appendix E for the test setup photos.



 6.2 Audio Signals
   During tests signal was fed to the EUT via communication Test set. Proper gain setting was used
   in software to ensure correct signal level fed to communication test set speech input.

   The following audio signals were pre-defined by DASY4 and used for calibration and
   measurements:

   48k_voice_1kHz_1 s (duration 1 s): This signal is voice like and has been processed to have a
   narrow bandwidth mainly within the 1 kHz third-octave band and an even shorter duration of 1
   second for faster measurement. This signal passes through a large variety of codecs and permits a
   direct amplitude and signal quality measurement (S/N) without considerable bandwidth
   compensation. Its spectrum is shown in a practical measurement in Figure 6.2a.




                                  Figure 6.2a 1.0 kHz Voice signal spectrum




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                                                                            FCC ID:     V65C5155
                                                                           Report #:    CT-C5156-13-0712-R0




   Multisine signal 50 Hz – 5 kHz (duration 10 s): Signal with carrier centered in each third-octave
   band, as used during the calibration. Suited for frequency response measurements. Peak to RMS
   ratio: 11.1 dB.


   48k_voice_300-3000 (duration 2 s): The signal is voice like and has been processed to have a
   duration of 2 seconds for fast measurement. At the same time, it has a flat spectrum across all
   third-octave band filters between 300 Hz to 3 kHz and is vanishing at the beginning and end in
   order to allow longer measurement sequences without transients. It has bandwidth sufficient for
   frequency response measurements. The spectrum is shown in a practical measurement in fig. 6.2b.
   The measurement window length of this signal must be set to a multiple of 2 s in order to integrate
   over the full voice sample. Peak to RMS ratio: 21.6 dB.




                                   Figure 6.2b Broadband signal spectrum




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                                                                           Applicant:   Kyocera
                                                                            FCC ID:     V65C5155
                                                                           Report #:    CT-C5156-13-0712-R0



 6.3 Scan Procedures


   6.3.1 Signal Strength and SNR
   a) A 50mm x 50mm (10mm step) coarse axial scan was performed to search for the “optimal points”
       and spatial distribution of ABM1.
   b) Base on the coarse scan results, a 16mm x 16mm (4mm step) point scan in axial, a
       24mmx16mm (4mm step) point scan in radial_L, and a 16mmx24mm (4mm step) point scan in
       radial-T coil orientation were performed for both ABM1and ABM2.




   6.3.2 Frequency Response
   Base on the coarse axial scan results, a point axial scan was performed.




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                                                                           Applicant:   Kyocera
                                                                            FCC ID:     V65C5155
                                                                           Report #:    CT-C5156-13-0712-R0



7        DESCRIPTION OF TEST PROCEDURE

Table 7.1 shows the uncertainty budget for HAC Audio Band Magnetic Field (AMB) assessment
according to ANSI C63.19-2006. The budget is valid for the DASY4 system and represents a worst-
case analysis. For specific tests and configurations, the uncertainty could be smaller.

         Uncertainty Description        Uncert.   Prob.   Div.     Ci        Ci       Stand.    Stand.
                                         Value    Dist.          (ABM1)    (ABM2)    Uncert    Uncert
                                         ( %)                                       (ABM1)    (ABM2)
                                                                                       (%)      (%)
    PROBE SENSITIVITY
    Reference level                       3.0       N      1.0      1         1         3.0      3.0
    AMCC geometry                         0.4       R      1.7      1         1         0.2      0.2
    AMCC current                          0.6       R      1.7      1         1         0.4      0.4
    Probe positioning during
                                          0.1       R      1.7      1         1         0.1      0.1
    calibration
    Noise contribution                    0.7       R      1.7    0.0143      1          0       0.4
    Frequency slope                       5.9       R      1.7       1        1         0.3      3.5
    PROBE SYSTEM
    Repeatability / Drift                 1.0       R      1.7      1         1         0.6      0.6
    Linearity / Dynamic range             0.6       R      1.7      1         1         0.4      0.4
    Acoustic noise                        1.0       R      1.7     0.1        1         0.1      0.6
    Probe angle                           2.3       R      1.7      1         1         1.4      1.4
    Spectral processing                   0.9       R      1.7      1         1         0.5      0.5
    Integration time                      0.6       N      1.0      1         5         0.6      3.0
    Field distribution                    0.2       R      1.7      1         1         0.1      0.1
    TEST SIGNAL
    Reference signal spectral
                                          0.6       R      1.7      0         1         0        0.4
    response
    POSITIONING
    Probe positioning                     1.9       R      1.7      1         1         1.1      1.1
    Phantom thickness                     0.9       R      1.7      1         1         0.5      0.5
    DUT positioning                       1.9       R      1.7      1         1         1.1      1.1
    EXTERNAL CONTRIBUTIONS
    RF interference                        0        R      1.7      1         1          0        0
    Test signal variation                 2.0       R      1.7      1         1         1.2      1.2

                                    COMBINED UNCERTAINTY
                                    Combined Standard Uncertainty (ABM):                4.1      6.1
                                   Extended Standard Uncertainty (k=2) [%]:             8.1     12.3
         N: Normal
         R: Rectangular

                    Table 7.1 Worst-Case uncertainty budget for HAC ABM assessment



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8       T-COIL REQUIREMENTS AND CATEGORY


    8.1 RF Emissions
    EUT has to fulfill RF emission requirements at the axial measurement location.


    8.2 Axial Field Intensity
    Table 8.2 shows the minimum limits for ABM1 field intensity:

       Component                ABN1 Magnetic Field                Condition
                                dB(A/m)
       Axial (z)                            ≥-18                   1 kHz, in 1/3 octave band filter
       Radial (x, y)                        ≥-18

                                    Table 8.2 ABM1 Intensity Requirements



    8.3 Signal Quality
    Table 8.3 provides the signal quality requirement for the intended T-Coil signal from a Wireless
    Device. The worst Signal Quality of the axial and radial components of the magnetic field was used
    to determine the T-Coil category.

                       Category          Signal Quality (Signal+Noise to Noise) [dB]
                           T1                                 0 to 10
                           T2                                 10 to 20
                           T3                                 20 to 30
                           T4                                   > 30
                   AWF=0

                                   Table 8.3 T-coil Signal Quality Categories




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  8.4 Frequency Response
   The frequency response of the axial component must follow the frequency curve specified in ANSI
   C63.19-2007 section 7.3.2, over the frequency range 300-3000 Hz (Figure 8.4).


                                                       Magnetic Field Response (300Hz to 3kHz) for devices with a field £15dB (A/m) at 1 kHz

                                          20.00



                                                                         -4 dB/Oct.
         dB relative to value at 1kHz




                                          10.00
                                                                                                                          +2 dB


                                                                    +2 dB
                                           0.00
                                                                                                                          -6 dB/Oct.



                                         -10.00            +6 dB/Oct.

                                                                                                                                          lower limit
                                                                                                                                          upper limit
                                         -20.00
                                              100.00                                              1000.00                                           10000.00
                                                                                            Frequency (Hz)



                                         Figure 8.4a Magnetic Field Response (300Hz to 3kHz) for devices with a field 15dB (A/m) at 1 kHz



                                                       Magnetic Fieldy Response (300Hz to 3kHz) for devices with a field that > -10dB (A/m) at 1
                                                                                               kHz
                                         20.00
          dB relative to value at 1kHz




                                                                                          -4 dB/Oct.
                                                                                                                          +2 dB
                                         10.00


                                                                        -2 dB
                                          0.00
                                                                                                                             -7 dB/Oct.


                                         -10.00
                                                                                      6 dB/Oct.
                                                                                                                                             lower limit
                                                                                                    -12 dB/Oct.                              upper limit
                                         -20.00
                                              100.00                                              1000.00                                               10000.00
                                                                                            Frequency (Hz)


     Figure 8.4b Magnetic Field Response (300Hz to 3kHz) for devices with a field that > -15dB (A/m) at 1 kHz




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9       T-COIL TEST RESULTS

    9.1 Field Strength and Signal Quality

                                           ANSI C63.19 (2007)
                                              Section 6 T-coil
                                    Field Strength and Signal Quality
                                               Slide Close
      Band        Ch.        Probe        Ambient Noise        ABM1       ABM2      ABM1/ABM2          T-
                            Position        dB A/m             dB A/m    dB A/m        dB             Rating
                          Axial (z)                                                                     4
                 476      Radial_L (x)                                                                  4
                          Radial_T (y)                                                                  4
     CDMA
                          Axial (z)                                                                     4
      800-
                 580      Radial_L (x)                                                                  4
     BC10
                          Radial_T (y)                                                                  4
                          Axial (z)                                                                     4
                 684      Radial_L (x)                                                                  4
                          Radial_T (y)                                                                  4
                          Axial (z)           -55.79           0.18      -53.20         53.38           4
                 1013     Radial_L (x)        -59.02           -7.90     -57.58         49.68           4
                          Radial_T (y)        -58.98           -7.54     -55.66         48.12           4
     CDMA
                          Axial (z)           -55.79           -0.28     -53.02         52.74           4
      800-
                 384      Radial_L (x)        -59.02           -7.65     -57.58         49.93           4
      BC0
                          Radial_T (y)        -58.98           -9.27     -57.33         48.05           4
                          Axial (z)           -55.79           -0.16     -53.44         53.28           4
                 777      Radial_L (x)        -59.02           -7.81     -57.34         49.52           4
                          Radial_T (y)        -58.98           -8.74     -57.50         48.76           4
                          Axial (z)           -55.79           -0.69     -53.48         52.79           4
                  25      Radial_L (x)        -59.02           -7.85     -56.91         49.06           4
                          Radial_T (y)        -58.98           -7.38     -55.28         47.90           4
                          Axial (z)           -55.79           -0.33     -53.14         52.81           4
     CDMA        600      Radial_L (x)        -59.02           -7.83     -57.38         49.55           4
      1900                Radial_T (y)        -58.98           -7.54     -55.18         47.64           4
                          Axial (z)           -55.79           -0.33     -53.79         53.46           4
                 1175     Radial_L (x)        -59.02           -8.08     -56.95         48.87           4
                          Radial_T (y)        -58.98           -9.59     -57.32         47.73           4
    Note:
            Bold Number = worst case at each frequency band
            Data plots are showed in Appendix D




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  9.2 Frequency Response

                                             ANSI C63.19 (2007)
                                                Section 6 T-coil
                                             Frequency Response
            Mode              Probe Position               Signal Type                     Result
      CDMA 800 BC-10                 Axial                     Voice                         N/A
      CDMA 800 BC-0                  Axial                     Voice                        Pass
         CDMA 1900                   Axial                     Voice                        Pass

    Figure 9.2 show the worst-case frequency response of the axial component of the magnetic field.




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                      Figure 9.2a CDMA 800 BC-0, Slide Close, Frequency Response




                        Figure 9.2b CDMA 1900, Slide Close, Frequency Response




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10      APPENDIX A1: AMBIENT NOISE PLOTS, 800 MHZ

Ambient Noise Spectrum
Plot: Axial (z)




Ambient Noise Spectrum
Plot: Radial Longitudinal (x)




Ambient Noise Spectrum
Plot:
Radial Transversal (y)




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11      APPENDIX A2: AMBIENT NOISE PLOTS, 1900 MHZ

Ambient Noise Spectrum
Plot Axial (z)




Ambient Noise Spectrum
Plot Radial_Longitudinal (x)




Ambient Noise Spectrum
Plot Radial_Transversal (y)




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12      APPENDIX B: SYSTEM CALIBRATION RESULTS




13      APPENDIX C: ABM AND SNR TEST RESULTS/PLOTS

        (See attachment)

14      APPENDIX D: PROBE CALIBRATION CERTIFICATE

        (See attachment)

15      APPENDIX E: PHOTO TEST SETUP

        (See attachment)




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Document Created: 2012-08-03 15:58:07
Document Modified: 2012-08-03 15:58:07

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