Test Report

FCC ID: 2AO23-BTWB88

Test Report

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FCCID_4383128

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A\GC                                                                                        Report No.: AGCO07105190701FEO3
                                                                                                                       Page 43 of 66


                                       RADIATED EMISSION ABOVE 1GHZ
EUT                           Wireless Bluetooth Earbuds                 Model Name                      BTWB66

Temperature                   25°C                                       Relative Humidity              55.4%
Pressure                      960hPa                                     Test Voltage                    Normal Voltage

Test Mode                     Mode 1                                     Antenna                         Horizontal


      Frequency       Meter Reading      Factor           Emission Level           Limits             Margin
                                                                                                                        Value Type
        (MH2)            (dBuV)           (dB)               (dBuV/im)           (dBuV/im)             (dB)
      4804.000           54.87            0.08                 54.95                74                —19.05              peak
      4804.000           49.67            0.08                 49.75                54                 —4.25              AVG
      7206.000           46.97            2.21                 49.18                74                —24.82              peak
      7206.000           43.54            2.21                 45.75                54                 —8.25              AVG


 Remark:
 Factor = Antenna Factor + Cable Loss — Pre—amplifier.




EUT                           Wireless Bluetooth Earbuds                 Model Name                      BTWB66

Temperature                   25°C                                       Relative Humidity              55.4%
Pressure                      960hPa                                     Test Voltage                    Normal Voltage

Test Mode                     Mode 1                                     Antenna                        Vertical


      Frequency       Meter Reading      Factor           Emission Level           Limits             Margin
                                                                                                                        Value Type
        (MH2)            (dBu\V)          (dB)               (dBuV/im)           (dBuV/im)             (dB)
      4804.000           54.62            0.08                  54.7                74                 —19.3              peak
      4804.000           49.45            0.08                 49.53                54                 —4.47              AVG
      7206.000           45.78            2.21                 47.99                74                —26.01              peak
      7206.000           41.63            2.21                 43.84                54                10.16               AVG


 Remark:
 Factor = Antenna Factor + Cable Loss — Pre—amplifier.




                                        Attestation of Global Compliance(Shenzhen)Co.,Ltd.

                                        Add: 2/F., Building 2, No.1—4, Chaxi Sanwei Technial Industrial Park, Gushu,
                                               Xixiang, Bao‘an District, Shenzhen, Guangdong, China
                                        Tel:   +86—755 2523 4088       E—mail: agc@ageo—cert.com       Service Hotline:400 089 2118


                                                                            Report No.: AGC07105190701FE03
                                                                                              Page 44 of 66




EUT                       Wireless Bluetooth Earbuds           Model Name            BTWB66
Temperature               25°C                                 Relative Humidity     55.4%
Pressure                  960hPa                               Test Voltage          Normal Voltage
Test Mode                 Mode 2                               Antenna               Horizontal


      Frequency   Meter Reading      Factor     Emission Level        Limits       Margin
                                                                                                  Value Type
        (MHz)        (dBμV)           (dB)        (dBμV/m)          (dBμV/m)        (dB)
      4882.000        56.54          0.14              56.68           74          -17.32           peak
      4882.000        53.74          0.14              53.88           54           -0.12           AVG
      7323.000        50.43          2.36              52.79           74          -21.21           peak
      7323.000        42.69          2.36              45.05           54           -8.95           AVG



 Remark:
 Factor = Antenna Factor + Cable Loss – Pre-amplifier.




EUT                       Wireless Bluetooth Earbuds           Model Name            BTWB66
Temperature               25°C                                 Relative Humidity     55.4%
Pressure                  960hPa                               Test Voltage          Normal Voltage

Test Mode                 Mode 2                               Antenna               Vertical


      Frequency   Meter Reading      Factor     Emission Level        Limits       Margin
                                                                                                  Value Type
        (MHz)        (dBμV)           (dB)        (dBμV/m)          (dBμV/m)        (dB)
      4882.000        54.32          0.14              54.46           74          -19.54           peak
      4882.000        48.69          0.14              48.83           54           -5.17           AVG
      7323.000        43.57          2.36              45.93           74          -28.07           peak
      7323.000        40.31          2.36              42.67           54          -11.33           AVG



 Remark:
 Factor = Antenna Factor + Cable Loss – Pre-amplifier.


                                                                             Report No.: AGC07105190701FE03
                                                                                               Page 45 of 66




EUT                        Wireless Bluetooth Earbuds           Model Name            BTWB66
Temperature                25°C                                 Relative Humidity     55.4%
Pressure                   960hPa                               Test Voltage          Normal Voltage
Test Mode                  Mode 3                               Antenna               Horizontal


      Frequency    Meter Reading      Factor     Emission Level        Limits       Margin
                                                                                                   Value Type
        (MHz)         (dBμV)           (dB)        (dBμV/m)          (dBμV/m)        (dB)
      4960.000         53.79           0.22             54.01           74          -19.99           peak
      4960.000         48.67           0.22             48.89           54           -5.11           AVG
      7440.000         42.96           2.64             45.6            74           -28.4           peak
      7440.000         39.88           2.64             42.52           54          -11.48           AVG



  Remark:
  Factor = Antenna Factor + Cable Loss – Pre-amplifier.




EUT                        Wireless Bluetooth Earbuds           Model Name            BTWB66
Temperature                25°C                                 Relative Humidity     55.4%
Pressure                   960hPa                               Test Voltage          Normal Voltage

Test Mode                  Mode 3                               Antenna               Vertical


      Frequency    Meter Reading      Factor     Emission Level        Limits       Margin
                                                                                                   Value Type
        (MHz)         (dBμV)           (dB)        (dBμV/m)          (dBμV/m)        (dB)
      4960.000         54.69           0.22             54.91           74          -19.09           peak
      4960.000         47.76           0.22             47.98           54           -6.02           AVG
      7440.000         45.21           2.64             47.85           74          -26.15           peak
      7440.000         38.67           2.64             41.31           54          -12.69           AVG



  Remark:
  Factor = Antenna Factor + Cable Loss – Pre-amplifier.
RESULT: PASS
Note: Other emissions from 1G to 25 GHz are considered as ambient noise. No recording in the test report.
      Factor = Antenna Factor + Cable loss - Amplifier gain, Over=Measure-Limit.
       The “Factor” value can be calculated automatically by software of measurement system.
       All test modes had been tested. The GFSK modulation is the worst case and recorded in the report.


                                                         Report No.: AGC07105190701FE03
                                                                           Page 46 of 66


               TEST RESULT FOR RESTRICTED BANDS REQUIREMENTS
EUT              Wireless Bluetooth Earbuds   Model Name          BTWB66

Temperature      25°C                         Relative Humidity   55.4%
Pressure         960hPa                       Test Voltage        Normal Voltage
Test Mode        Mode 1                       Antenna             Horizontal
                                         PK




                                         AV




RESULT: PASS


                                                       Report No.: AGC07105190701FE03
                                                                         Page 47 of 66


EUT            Wireless Bluetooth Earbuds   Model Name          BTWB66

Temperature    25°C                         Relative Humidity   55.4%
Pressure       960hPa                       Test Voltage        Normal Voltage
Test Mode      Mode 1                       Antenna             Vertical
                                       PK




                                       AV




RESULT: PASS


                                                       Report No.: AGC07105190701FE03
                                                                         Page 48 of 66


EUT            Wireless Bluetooth Earbuds   Model Name          BTWB66

Temperature    25°C                         Relative Humidity   55.4%
Pressure       960hPa                       Test Voltage        Normal Voltage
Test Mode      Mode 3                       Antenna             Horizontal
                                       PK




                                       AV




RESULT: PASS


                                                                           Report No.: AGC07105190701FE03
                                                                                             Page 49 of 66


EUT                        Wireless Bluetooth Earbuds         Model Name             BTWB66
Temperature                25°C                               Relative Humidity      55.4%
Pressure                   960hPa                             Test Voltage           Normal Voltage
Test Mode                  Mode 3                             Antenna                Vertical
                                                     PK




                                                     AV




RESULT: PASS
Note: The factor had been edited in the “Input Correction” of the Spectrum Analyzer. So the Amplitude of test
plots is equal to Reading level plus the Factor in dB. Use the A dB(μV) to represent the Amplitude. Use the F
dB(μV/m) to represent the Field Strength. So A=F. All test modes had been pre-tested. The GFSK modulation
is the worst case and recorded in the report.


                                                                           Report No.: AGC07105190701FE03
                                                                                             Page 50 of 66


11. NUMBER OF HOPPING FREQUENCY
11.1. MEASUREMENT PROCEDURE
The EUT shall have its hopping function enabled. Use the following spectrum analyzer settings:
1. Span: The frequency band of operation. Depending on the number of channels the device supports, it may
be necessary to divide the frequency range of operation across multiple spans, to allow the individual
channels to be clearly seen.
2. RBW: To identify clearly the individual channels, set the RBW to less than 30% of the channel spacing or
the 20 dB bandwidth, whichever is smaller.
3. VBW ≥ RBW. Sweep: Auto. Detector function: Peak. Trace: Max hold.
4. Allow the trace to stabilize


11.2. TEST SETUP (BLOCK DIAGRAM OF CONFIGURATION)
   Same as described in section 8.2


11.3. MEASUREMENT EQUIPMENT USED
   The same as described in section 6


11.4. LIMITS AND MEASUREMENT RESULT

   TOTAL NO. OF               LIMIT (NO. OF CH)        MEASUREMENT (NO. OF CH)                 RESULT
 HOPPING CHANNEL                      >=15                            79                         PASS
                               TEST PLOT FOR NO. OF TOTAL CHANNELS




Note: The GFSK modulation is the worst case and recorded in the report.


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                                                                                                Page 51 of 66


12. TIME OF OCCUPANCY (DWELL TIME)
12.1. MEASUREMENT PROCEDURE
The EUT shall have its hopping function enabled. Use the following spectrum analyzer settings:
1. Span: Zero span, centered on a hopping channel.
2. RBW shall be≤channel spacing and where possible RBW should be set >> 1 / T, where T is the expected
dwell time per channel.
3. Sweep: As necessary to capture the entire dwell time per hopping channel; where possible use a video
trigger and trigger delay so that the transmitted signal starts a little to the right of the start of the plot. The
trigger level might need slight adjustment to prevent triggering when the system hops on an adjacent channel;
a second plot might be needed with a longer sweep time to show two successive hops on a channel.
4. Detector function: Peak. Trace: Max hold.
5. Use the marker-delta function to determine the transmit time per hop.
6. Repeat the measurement using a longer sweep time to determine the number of hops over the period
specified in the requirements. The sweep time shall be equal to, or less than, the period specified in the
requirements. Determine the number of hops over the sweep time and calculate the total number of hops in
the period specified in the requirements, using the following equation:
  (Number of hops in the period specified in the requirements) = (number of hops on spectrum analyzer) ×
(period specified in the requirements / analyzer sweep time)
7. The average time of occupancy is calculated from the transmit time per hop multiplied by the number of
hops in the period specified in the requirements.


12.2. TEST SETUP (BLOCK DIAGRAM OF CONFIGURATION)
  Same as described in section 8.2


12.3. MEASUREMENT EQUIPMENT USED
  The same as described in section 6


12.4. LIMITS AND MEASUREMENT RESULT
                     Time of Pulse
                                          Number of hops in the period           Sweep Time              Limit
    Channel             for DH5
                                          specified in the requirements             (ms)                 (ms)
                          (ms)
      Low                 2.933                         26*4                       305.032                400
     Middle               2.917                         26*4                       303.368                400
      High                2.917                         26*4                       303.368                400

Note: The GFSK modulation is the worst case and recorded in the report.


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TEST PLOT OF LOW CHANNEL


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TEST PLOT OF MIDDLE CHANNEL


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TEST PLOT OF HIGH CHANNEL


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                                                                                            Page 55 of 66


13. FREQUENCY SEPARATION
13.1. MEASUREMENT PROCEDURE
The EUT shall have its hopping function enabled. Use the following spectrum analyzer settings:
1. Span: Wide enough to capture the peaks of two adjacent channels.
2. RBW: Start with the RBW set to approximately 30% of the channel spacing; adjust as necessary to best
identify the center of each individual channel.
3. Video (or average) bandwidth (VBW) ≥ RBW.
4. Sweep: Auto. e) Detector function: Peak. f) Trace: Max hold. g) Allow the trace to stabilize.
Use the marker-delta function to determine the separation between the peaks of the adjacent channels.


13.2. TEST SETUP (BLOCK DIAGRAM OF CONFIGURATION)
  Same as described in section 6.2


13.3. MEASUREMENT EQUIPMENT USED
  The same as described in section 6.3


13.4. LIMITS AND MEASUREMENT RESULT

    CHANNEL          CHANNEL SEPARATION (KHz)                     LIMIT (KHz)                 RESULT
   CH01-CH02                         1000                  >=25 KHz or 2/3 20 dB BW             PASS
                              TEST PLOT FOR FREQUENCY SEPARATION




Note: The GFSK modulation is the worst case and recorded in the report.


                                                                             Report No.: AGC07105190701FE03
                                                                                               Page 56 of 66


14. FCC LINE CONDUCTED EMISSION TEST
14.1. LIMITS OF LINE CONDUCTED EMISSION TEST

                                                               Maximum RF Line Voltage
             Frequency
                                                   Q.P.( dBuV)                         Average( dBuV)
          150kHz~500kHz                                66-56                                56-46
           500kHz~5MHz                                  56                                    46
           5MHz~30MHz                                   60                                    50
Note: 1. The lower limit shall apply at the transition frequency.
      2. The limit decreases linearly with the logarithm of the frequency in the range 0.15 MHz to 0.50 MHz.


14.2. BLOCK DIAGRAM OF LINE CONDUCTED EMISSION TEST



                  EUT & Support
                  Units


                                                                          Report No.: AGC07105190701FE03
                                                                                            Page 57 of 66



14.3. PRELIMINARY PROCEDURE OF LINE CONDUCTED EMISSION TEST
1.   The equipment was set up as per the test configuration to simulate typical actual usage per the user’s
     manual. When the EUT is a tabletop system, a wooden table with a height of 0.8 meters is used and is
     placed on the ground plane as per ANSI C63.10 (see Test Facility for the dimensions of the ground plane
     used). When the EUT is a floor-standing equipment, it is placed on the ground plane which has a 3-12
     mm non-conductive covering to insulate the EUT from the ground plane.
2.   Support equipment, if needed, was placed as per ANSI C63.10.
3.   All I/O cables were positioned to simulate typical actual usage as per ANSI C63.10.
4.   All support equipments received AC120V/60Hz power from a LISN, if any.
5.   The EUT received DC 15V power from adapter which received AC120V/60Hz power from a LISN.
6.   The test program was started. Emissions were measured on each current carrying line of the EUT using a
     spectrum Analyzer / Receiver connected to the LISN powering the EUT. The LISN has two monitoring
     points: Line 1 (Hot Side) and Line 2 (Neutral Side). Two scans were taken: one with Line 1 connected to
     Analyzer / Receiver and Line 2 connected to a 50 ohm load; the second scan had Line 1 connected to a
     50 ohm load and Line 2 connected to the Analyzer / Receiver.
7.   Analyzer / Receiver scanned from 150 kHz to 30MHz for emissions in each of the test modes.
8.   During the above scans, the emissions were maximized by cable manipulation.
9.   The test mode(s) were scanned during the preliminary test.

Then, the EUT configuration and cable configuration of the above highest emission level were recorded for
reference of final testing.


14.4. FINAL PROCEDURE OF LINE CONDUCTED EMISSION TEST
1.   EUT and support equipment was set up on the test bench as per step 2 of the preliminary test.
2.   A scan was taken on both power lines, Line 1 and Line 2, recording at least the six highest emissions.
     Emission frequency and amplitude were recorded into a computer in which correction factors were used
     to calculate the emission level and compare reading to the applicable limit. If EUT emission level was
     less –2dB to the A.V. limit in Peak mode, then the emission signal was re-checked using Q.P and Average
     detector.
3.   The test data of the worst case condition(s) was reported on the Summary Data page.


14.5. TEST RESULT OF LINE CONDUCTED EMISSION TEST
N/A
Note: The EUT can not use the BT function with charging.


                                   Report No.: AGC07105190701FE03
                                                     Page 58 of 66


APPENDIX A: PHOTOGRAPHS OF TEST SETUP
 RADIATED EMISSION TEST SETUP BELOW 1GHZ




 RADIATED EMISSION TEST SETUP ABOVE 1GHZ


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                                         Page 59 of 66


CONDUCTED TEST SETUP


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APPENDIX B: PHOTOGRAPHS OF EUT
        ALL VIEW OF EUT




        TOP VIEW OF EUT


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BOTTOM VIEW OF EUT




FRONT VIEW OF EUT


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BACK VIEW OF EUT




LEFT VIEW OF EUT


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RIGHT VIEW OF EUT




VIEW OF EUT(PORT)


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                                     Page 64 of 66


OPEN VIEW OF EUT




VIEW OF BATTERY


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                                           Page 65 of 66


INTERNAL VIEW OF EUT-1




INTERNAL VIEW OF EUT-2


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                                                 Page 66 of 66


      INTERNAL VIEW OF EUT-3




BT Antenna




      ----END OF REPORT----



Document Created: 2019-08-01 10:57:11
Document Modified: 2019-08-01 10:57:11

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