RF exposure evaluation

FCC ID: OKUSBB61984

RF Exposure Info

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FCCID_4341479

 SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD.                        FCC ID: OKUSBB61984               Report No.: LCS190418015AEA


                                       Maximum Permissible Exposure Report
Product Information
  FCC ID:                                         OKUSBB61984
  Product name                                    32”Slim Bluetooth Sound Bar Speaker
  Model number                                    NHS-2012A , NHS-2012, SBB-61984, NHS-2012XX
                                                  (XX means unit color, it can be A to Z or N/A)
                                                  PCB board, structure and internal of these model(s) are the same,
  Model Declaration
                                                  So no additional models were tested.
                                                  Adapter Mode: GKYPS0130090UL1
  Power supply                                    Input: 100-240~ 50/60Hz, 0.5A
                                                  Output: 9V 1300mA
  Modulation Type                                 GFSK, π/4-DQPSK, 8-DPSK
  Antenna Type                                    PCB Antenna
  Antenna Gain                                    0dBi(Max.)
  Hardware version                                V1.0
  Software version                                V1.0
  Bluetooth Version                               V5.0
  BT FCC Operation frequency                      2402MHz-2480MHz
  Extreme temp. Tolerance                         -20°C to +40°C
  Exposure category                               General population/uncontrolled environment
  EUT Type                                        Production Unit
  Device Type                                     Mobile Device


2. Evaluation Method
Systems operating under the provisions of FCC 47 CFR section shall be operated in a manner that ensures
that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines.
In accordance with 47 CFR FCC Part 2 Subpart J, section 2.1091 this device has been defined as mobile
device whereby a distance of 0.2m normally can be maintained between the user and the device, and below
RF Permissible Exposure limit shall comply with.

In accordance with KDB447498D01 for Simultaneous transmission MPE test exclusion applies when the sum
of the MPE ratios for all simultaneous transmitting antennas incorporated in a host device, based on the
calculated/estimated, numerically modelled or measured field strengths or power density, is ≤ 1.0. The MPE
ratio of each antenna is determined at the minimum test separation distance required by the operating
configurations and exposure conditions of the host device, according to the ratio of field strengths or power
density to MPE limit, at the test frequency. Either the maximum peak or spatially averaged results from
measurements or numerical simulations may be used to determine the MPE ratios. Spatial averaging does not
apply when MPE is estimated using simple calculations based on far-field plane-wave equivalent conditions.
The antenna installation and operating requirements for the host device must meet the minimum test
separation distances required by all antennas, in both standalone and simultaneous transmission operations,
to satisfy compliance.


3. Limit
3. 1 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 1 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 2.1091: Radiofrequency radiation exposure evaluation: mobile devices




    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: OKUSBB61984               Report No.: LCS190418015AEA

3. 2 Limit

                      Limits for Maximum Permissible Exposure (MPE)/Controlled Exposure
               Frequency         Electric Field    Magnetic Field    Power Density Averaging Time
              Range(MHz)         Strength(V/m)     Strength(A/m)        (mW/cm²)      (minute)
                                    Limits for Occupational/Controlled Exposure
                0.3 – 3.0              614              1.63              (100) *         6
                3.0 – 30             1842/f            4.89/f            (900/f2)*        6
                30 – 300              61.4             0.163                1.0           6
               300 – 1500               /                 /                f/300          6
             1500 – 100,000             /                 /                  5            6
                     Limits for Maximum Permissible Exposure (MPE)/Uncontrolled Exposure
               Frequency         Electric Field    Magnetic Field    Power Density Averaging Time
              Range(MHz)         Strength(V/m)     Strength(A/m)        (mW/cm²)      (minute)
                                    Limits for Occupational/Controlled Exposure
                0.3 – 3.0              614              1.63              (100) *        30
                3.0 – 30              824/f            2.19/f            (180/f2)*       30
                30 – 300              27.5             0.073                0.2          30
               300 – 1500               /                 /               f/1500         30
             1500 – 100,000             /                 /                 1.0          30

          F=frequency in MHz
          *=Plane-wave equivalent power density

4. MPE Calculation Method
Predication of MPE limit at a given distance
Equation from page 18 of OET Bulletin 65, Edition 97-01

S=PG/4πR²

Where: S=power density
       P=power input to antenna
       G=power gain of the antenna in the direction of interest relative to an isotropic radiator
       R=distance to the center of radiation of the antenna


5. Antenna Information
TPMS Receiver can only use antennas certificated as follows provided by manufacturer;

         Internal              Antenna type and
                                                              Operate frequency band                 Maximum antenna gain
       Identification          antenna number
        Antenna 0               PCB Antenna                   2402 MHz – 2480 MHz                                0 dBi

6. Conducted Power
                                                                                    Peak Conducted Output Power
                  Mode                Channel          Frequency(MHz)
                                                                                               (dBm)
                                         0                     2402                           -1.494
                   GFSK                  39                    2441                           -1.397
                                         78                    2480                           -1.446
                                         0                     2402                            0.633
               π/4DQPSK                  39                    2441                            0.795
                                         78                    2480                            0.746
                                         0                     2402                            1.061
                  8DPSK                  39                    2441                            1.199
                                         78                    2480                            1.178




    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: OKUSBB61984               Report No.: LCS190418015AEA


7. Manufacturing Tolerance

                                                          GFSK (Peak)
                   Channel                      Channel 0            Channel 39                           Channel 78
                Target (dBm)                      -1.0                  -1.0                                 -1.0
               Tolerance ±(dB)                     1.0                  1.0                                  1.0
                                                       π/4DQPSK (Peak)
                   Channel                      Channel 0            Channel 39                           Channel 78
                Target (dBm)                        0                    0                                    0
               Tolerance ±(dB)                     1.0                  1.0                                  1.0
                                                         8DPSK (Peak)
                   Channel                      Channel 0            Channel 39                           Channel 78
                Target (dBm)                       1.0                  1.0                                  1.0
               Tolerance ±(dB)                     1.0                  1.0                                  1.0


8. Measurement Results
8.1 Standalone MPE

As declared by the Applicant, the EUT is a wireless device used in a fix application, at least 20 cm from any
body part of the user or nearby persons; from the maximum EUT RF output power, the minimum separation
distance, r =20cm, as well as the gain of the used antenna refer to antenna information, the RF power density
can be obtained.

Antenna 0

                                   Output power               Antenna         Antenna                                         MPE
                                                                                               Duty          MPE
   Modulation Type                                             Gain             Gain                                          Limits
                                 dBm             mW                                            Cycle       (mW/cm2)
                                                               (dBi)          (linear)                                      (mW/cm2)
          GFSK                      0            1.0000          0               1.0           100%          0.0002          1.0000
       π/4DQPSK                     1            1.2589          0               1.0           100%          0.0003          1.0000
         8DPSK                      2            1.5849          0               1.0           100%          0.0003          1.0000

Remark:
1. Output power (Peak) including tune-up tolerance;
2. MPE evaluate distance is 20cm from user manual provide by manufacturer;


8.2 Simultaneous Transmission MPE

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


9. Conclusion

The measurement results comply with the FCC Limit per 47 CFR 2.1091 for the uncontrolled RF Exposure of
mobile device.



                             ----------------THE END OF REPORT---------------




    This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd.
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Document Created: 2019-06-28 16:15:14
Document Modified: 2019-06-28 16:15:14

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