RF exposure information

FCC ID: ZY4CM08

RF Exposure Info

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Report Number: 68.910.18.0065.01A




                                    RF exposure Estimation for CM-08

       Introduction
       CM-08 (FCC ID: ZY4CM08) is a Honeycomb motor operating at 433.925MHz.

1.     Limit and Guidelines on Exposure to Electromagnetic Fields

       According to 4.3 General SAR test exclusion guidance of KDB 447498 RF Exposure, no SAR
       required if power is lower than the flowing threshold:
       The 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation
       distances ≤ 50 mm are determined by:
        [(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 calculation25
            • 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 5) in section 4.3 is applied to
       determine SAR test exclusion.

2.     Calculation method

       [(max. power of` channel, including tune-up tolerance, mW)/(min. test separation distance,
       mm)] ·[√f(GHz)] ≤ 3.0

       According to ANSI C63.10-2013 (9.5 Equations to calculate EIRP),




                                       TÜV SÜD Certification and Testing (China) Co., Ltd. Shenzhen Branch
             Building 12&13, Zhiheng Wisdomland Business Park, Nantou Checkpoint Road 2, Nanshan District, Shenzhen City, 518052, P. R.
                                              China Tel. +86 755 8828 6998, Fax: +86 755 8828 5299


Report Number: 68.910.18.0065.01A


For 433.925MHz.
    Field Strength (EMeas):                                                                                              97.14 (dBuV/m)
                                                                                                                         (f=433.925 MHz)
    Measurement Distance(dMeas):                                                                                         3 (m)
    Equivalent Isotropically Radiated Power(EIRP):                                                                       1.58 (mW)



       Radiated Power + tune up tolerance = 1.58mW
       Distance = 5 mm
       f = 433.925MHz

       [1.58/5] * SQRT(0.433925) =0.21
       0.21 ≤ 3.0
       Therefore, excluded from SAR testing.


TUV SUD China, Shenzhen Branch

Reviewed by:                                                                          Prepared By:




Laurent Yuan/ EMC Project Manager                                                  Mark Chen/EMC Project Engineer

Date: 2019-05-27                                                                          Date: 2019-05-27




                                         TÜV SÜD Certification and Testing (China) Co., Ltd. Shenzhen Branch
               Building 12&13, Zhiheng Wisdomland Business Park, Nantou Checkpoint Road 2, Nanshan District, Shenzhen City, 518052, P. R.
                                                China Tel. +86 755 8828 6998, Fax: +86 755 8828 5299



Document Created: 2019-06-12 10:17:46
Document Modified: 2019-06-12 10:17:46

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