RF exposure letter

FCC ID: 2AGNTLDK2409A

RF Exposure Info

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FCCID_4233008

                              Shenzhen Zhongjian Nanfang Testing Co., Ltd.

                                Prediction of MPE at a given distance
1. Limits
 The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to
 radio frequency (RF) radiation as specified in 1.1307(b)
  Frequency range        Electric field strength     Magnetic field strength      Power density       Averaging time
                                                                                                  2
        (MHz)                     (V/m)                       (A/m)                 (mW/cm )            (minutes)

                                  (A) Limits for Occupational/Controlled Exposures

       0.3–3.0                     614                        1.63                    *(100)                   6
                                                                                              2
       3.0–30                     1842/f                      4.89/f                 *(900/f )                 6

       30–300                     61.4                        0.163                    1.0                     6

      300–1500                                                                        f/300                    6

    1500–100,000                                                                        5                      6

                             (B) Limits for General Population/Uncontrolled Exposure

       0.3–1.34                    614                        1.63                    *(100)               30
                                                                                              2
       1.34–30                    824/f                       2.19/f                 *(180/f )             30

       30–300                     27.5                        0.073                    0.2                 30

      300–1500                                                                        f/1500               30

    1500–100,000                                                                       1.0                 30


2. Test Procedure
 Equation from page 18 of OET Bulletin 65, Edition 97-01




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


                        Shenzhen Zhongjian Nanfang Testing Co., Ltd.

3. Result
                                                                                     Limits for
              Maximum    Maximum                                                      General
                                    Antenna    Antenna
  Frequency    Output     Output                           Distance    Result       Population/
                                     Gain       Gain                            2
    (MHz)      power      power                             (cm)      (mW/cm )      Uncontrolled
                                     (dBi)    (numeric)
               (dBm)      (mW)                                                       Exposure
                                                                                              2
                                                                                     (mW/cm )
                                   2.4G 1.4MHz Bandwidth
   2403.5      19.72      93.76        2        1.58        20.00       0.03            1.0

  Note: Just the worst case mode was shown in report.



4. Conclusion
  The device is exempt from the RF exposure evaluation.



Document Created: 2019-04-08 15:24:58
Document Modified: 2019-04-08 15:24:58

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