RF exposure evaluation

FCC ID: 2ASNZ-H1-DUC01

RF Exposure Info

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SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD.                                                             FCC ID: 2ASNZ-H1-DUC01

                                        FCC RF Exposure Evaluation
         1.                            Product Information

        FCC ID:                                 2ASNZ-H1-DUC01
        Product name                            DUO wireless speaker
        Model number                            H1-duc01, H1-duc02, H1-duc03, H1-duc04, H1-duc05, H1-duc06
                                                DC 7.40V by battery (2200mAh)
        Power supply
                                                Recharged by DC 12V/2A
                                                GFSK, π/4-DQPSK, 8-DPSK for Bluetooth V4.0 (BT Classics)
        Modulation Type
                                                GFSK for Bluetooth V4.0 (BT LE)
                                                79 Channels for Bluetooth V4.0 (BT Classics)
        Channel Number
                                                40 Channels for Bluetooth V4.0 (BT LE)
                                                1MHz for Bluetooth V4.0 (BT Classics)
        Channel Spacing
                                                2MHz for Bluetooth V4.0 (BT LE)
        Antenna Type                            PCB Antenna
        Antenna Gain                            2.0 dBi (maximum)
        Hardware version                        V1.2
        Software version                        SDK4.2
        Bluetooth Operation frequency           2402MHz-2480MHz
        Exposure category                       General population/uncontrolled environment
        EUT Type                                Production Unit
        Device Type                             Portable Device
                                                PCB board, structure and internal of these model(s) are the same,
        Model Declaration
                                                So no additional models were tested.

         2.                            Evaluation Method and Limit

          According to KDB447498 D01 General RF Exposure Guidance v06Section 4.3.1 Standalone SAR test
          exclusion considerations: “Unless specifically required by the published RF exposure KDB procedures,
          standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure
          conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test
          Exclusion Threshold condition, listed below, is satisfied. These test exclusion conditions are based on
          source-based time-averaged maximum conducted output power of the RF channel requiring evaluation,
          adjusted for tune-up tolerance, and the minimum test separation distance required for the exposure
          conditions. The minimum test separation distance is determined by the smallest distance from the
          antenna and radiating structures or outer surface of the device, according to the host form factor,
          exposure conditions and platform requirements, to any part of the body or extremity of a user or
          bystander (see 5) of section 4.1). To qualify for SAR test exclusion, the test separation distances
          applied must be fully explained and justified by the operating configurations and exposure conditions of
          the transmitter and applicable host platform requirements, typically in the SAR measurement or SAR
          analysis report, according to the required published RF exposure KDB procedures. When no other RF
          exposure testing or reporting is required, a statement of justification and compliance must be included
          in the equipment approval, in lieu of the SAR report, to qualify for the SAR test exclusion. When
          required, the device specific conditions described in the other published RF exposure KDB procedures
          must be satisfied before applying these SAR test exclusion provisions; for example, handheld PTT
          two-way radios, handsets, laptops & tablets etc.“
          [(max. power of channel, including tune-up tolerance, mW)/ (min. test separation distance, mm)] · [√f
          (GHz)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, where:
          • f (GHz) is the RF channel transmit frequency in GHz
          • Power and distance are rounded to the nearest mW and mm before calculation
          • The result is rounded to one decimal place for comparison
          • 3.0 and 7.5 are referred to as the numeric thresholds in the step 2 below
           The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for
           transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is
           < 5 mm, a distance of 5 mm according to f) in section 4.1 is applied to determine SAR test exclusion.


   This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd.
                                                                  Page 1 of 3


SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD.                                                             FCC ID: 2ASNZ-H1-DUC01


           When one of the following test exclusion conditions is satisfied for all combinations of simultaneous
           transmission configurations, further equipment approval is not required to incorporate transmitter
           modules in host devices that operate in the mixed mobile and portable host platform exposure
           conditions. The grantee is responsible for documenting this according to Class I permissive change
           requirements. Antennas that qualify for standalone SAR test exclusion must apply the estimated
           standalone SAR to determine simultaneous transmission test exclusion.
           a)                      The [∑ of (the highest measured or estimated SAR for each standalone antenna
               configuration, adjusted for maximum tune-up tolerance) / 1.6 W/kg] + [∑ of MPE ratios] is ≤ 1.0.
           b)                      The SAR to peak location separation ratios of all simultaneously transmitting
               antenna pairs operating in portable device exposure conditions are all ≤ 0.04, and the [∑ of MPE
               ratios] is ≤ 1.0.

         3.                            Refer Evaluation Method

          ANSI C95.1–1999: IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency
          Electromagnetic Fields, 3 kHz to 300 GHz.
          FCC KDB publication 447498 D01 General RF Exposure Guidance v06: Mobile and Portable Devices RF
          Exposure Procedures and Equipment Authorization Policies.
          FCC CFR 47 part1 1.1310: Radiofrequency radiation exposure limits.
          FCC CFR 47 part2 2.1093: Radiofrequency radiation exposure evaluation: portable devices

         4.                            Conducted Power Results
         4.1                           Test Setup Block Diagram




         4.2                           Test Equipment

         Item        Kind of Equipment           Manufacturer          Type No.           Serial No.        Calibrated until
           1            Power Meter                 R&S                 NRVS               100444             2019-06-15
           2           Power Sensor                 R&S                NRV-Z32             10057              2019-06-15

       Remark: all calibration period of equipment list is one year.

         4.3                           Test Procedure

                       a.          The EUT was directly connected to the power meter and antenna output port
                          as show in the block diagram Test Setup;
                       b.          Setup EUT work at duty cycle more than 98%;
                       c.              Read power sensor values in RMS detector;

                                                          [BT Classics]
                   Mode              Channel       Frequency (MHz) Average Conducted Output Power (dBm)
                                        0               2402                       0.91
                   GFSK                39               2441                       1.55
                                       78               2480                       1.39
                                        0               2402                       1.12
                π/4DQPSK               39               2441                       1.98
                                       78               2480                       1.75
                                        0               2402                       1.32
                  8DPSK                39               2440                       2.16
                                       78               2480                       1.88


   This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd.
                                                                  Page 2 of 3


SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD.                                                             FCC ID: 2ASNZ-H1-DUC01

                                                             [BT LE]
                   Mode              Channel       Frequency (MHz)         Average Conducted Output Power (dBm)
                                        0               2402                               1.14
                   GFSK                19               2440                               2.03
                                       39               2480                               1.89


         5.                            Manufacturing Tolerance
                                                           [BT Classics]
                                                          GFSK (Average)
                   Channel                      Channel 0                Channel 39                       Channel 78
                Target (dBm)                       1.0                      2.0                              2.0
               Tolerance ±(dB)                     1.0                      1.0                              1.0
                                                       π/4DQPSK (Average)
                   Channel                      Channel 0                Channel 39                       Channel 78
                Target (dBm)                       2.0                      2.0                              2.0
               Tolerance ±(dB)                     1.0                      1.0                              1.0
                                                         8DPSK (Average)
                   Channel                      Channel 0                Channel 39                       Channel 78
                Target (dBm)                       2.0                      3.0                              2.0
               Tolerance ±(dB)                     1.0                      1.0                              1.0


                                                            [BT LE]
                                                     GFSK – BT LE (Average)
                   Channel                      Channel 0              Channel 19                         Channel 39
                Target (dBm)                       2.0                    3.0                                2.0
               Tolerance ±(dB)                     1.0                    1.0                                1.0


         6.                            Evaluation Results

        6.1 Standalone Evaluation
                                Antenna Distance                   RF output power            SAR Test Exclusion        SAR Test
       Band/Mode      f (GHz)
                                     (mm)                          dBm         mW                Threshold              Exclusion
           GFSK        2.450           5                           3.00       1.9953              0.6 < 3.0                Yes
        π/4DQPSK       2.450           5                           3.00       1.9953              0.6 < 3.0                Yes
          8DPSK        2.450           5                           4.00       2.5119              0.8 < 3.0                Yes
       GFSK – BT LE    2.450           5                           4.00       2.5119              0.8 < 3.0                Yes

          Remark:
          1. Output power including tune up tolerance;
          2. When the minimum test separation distance is < 5 mm, a distance of 5 mm according to f) in section
          4.1 of KDB447498 is applied to determine SAR test exclusion.

         6.2 Simultaneous Transmission for SAR Exclusion

          The sample support one BT modular and one antenna, no need consider simultaneous transmission;


         7.                            Conclusion
            The measurement results comply with the FCC Limit per 47 CFR 2.1093 for the uncontrolled RF Exposure
            and SAR Exclusion Threshold per KDB 447498 v06.


                            .......................THE END OF REPORT.........................



   This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd.
                                                                  Page 3 of 3



Document Created: 2019-04-10 20:19:09
Document Modified: 2019-04-10 20:19:09

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