MPE

FCC ID: X7V6291103272

RF Exposure Info

Download: PDF
FCCID_1683613

FCC TEST REPORT                     Report No. : FR181654-02




        Appendix A. RF Exposure Evaluation




                                       Page No.   : A1 of A3
                                       FCC ID     : X7V6291103272


FCC TEST REPORT                                                                  Report No. : FR181654-02


1. Maximum Permissible Exposure
1.1. Applicable Standard
    Systems operating under the provisions of this section shall be operated in a manner that ensures that
    the public is not exposed to radio frequency energy levels in excess limit for maximum permissible
    exposure. In accordance with 47 CFR FCC Part 2 Subpart J, section 2.1091 this device has been
    defined as a mobile device whereby a distance of 0.2 m normally can be maintained between the user
    and the device.
    (A) Limits for Occupational / Controlled Exposure
                                                                                              Averaging Time
      Frequency Range         Electric Field        Magnetic Field      Power Density (S)
                                                                                                |E|²,|H|² or S
            (MHz)           Strength (E) (V/m) Strength (H) (A/m)           (mW/ cm²)
                                                                                                  (minutes)
            0.3-3.0                 614                   1.63                  (100)*                 6
            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
                                                                                              Averaging Time
      Frequency Range         Electric Field        Magnetic Field      Power Density (S)
                                                                                                |E|²,|H|² or S
            (MHz)           Strength (E) (V/m) Strength (H) (A/m)           (mW/ cm²)
                                                                                                 (minutes)
           0.3-1.34                 614                  1.63                   (100)*                30
           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
    Note: f = frequency in MHz ; *Plane-wave equivalent power density

1.2. MPE Calculation Method

                30  P  G                                                 E2
    E (V/m) =                              Power Density:    Pd (W/m²) =
                    d                                                      377
    E = Electric field (V/m)
    P = Peak RF output power (W)
    G = EUT Antenna numeric gain (numeric)
    d = Separation distance between radiator and human body (m)
    The formula can be changed to

    Pd =
           30  P  G
            377  d 2
    From the peak EUT RF output power, the minimum mobile separation distance, d=0.2m, as well as the
    gain of the used antenna, the RF power density can be obtained.




                                                                                    Page No.   : A2 of A3
                                                                                    FCC ID     : X7V6291103272


FCC TEST REPORT                                                           Report No. : FR181654-02


1.3. Calculated Result and Limit
    Mobile
    For Single Chain:
    IEEE 802.11b
      Operating                                                                            Power
                       Min. User           Gain      Numeric   Output Power Conducted
      Frequency                                                                           Density
                     Distance (cm)         (dBi)      Gain        (dBm)     Power (mW)
        (GHz)                                                                            (mW/cm2)
         2.412               20              3      1.995262      16.36      43.2514        0.0172

    IEEE 802.11g
      Operating                                                                            Power
                        Min. User          Gain      Numeric   Output Power Conducted
      Frequency                                                                           Density
                      Distance (cm)        (dBi)      Gain        (dBm)     Power (mW)
        (GHz)                                                                            (mW/cm2)
         2.437               20              3      1.995262      22.14      163.6817       0.0650




    For Two Chains:
    Configuration ofIEEE 802.11n (20MHz)
      Operating                                                                            Power
                       Min. User     Gain            Numeric   Output Power Conducted
      Frequency                                                                           Density
                     Distance (cm)   (dBi)            Gain        (dBm)     Power (mW)
        (GHz)                                                                            (mW/cm2)
         2.412               20              3      1.995262      21.68      147.2313       0.0585

    Configuration ofIEEE 802.11n (40MHz)
      Operating                                                                            Power
                       Min. User     Gain            Numeric   Output Power Conducted
     Frequency                                                                            Density
                     Distance (cm)   (dBi)            Gain        (dBm)     Power (mW)
        (GHz)                                                                            (mW/cm2)
         2.422               20              3      1.995262      20.31      107.3989       0.0427
    **The antenna gain refer to report section 2.2 table.




                                                                             Page No.    : A3 of A3
                                                                             FCC ID      : X7V6291103272



Document Created: 2019-11-16 02:17:41
Document Modified: 2019-11-16 02:17:41

© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC