RF Exposure Report

FCC ID: 2APN5SONOFF4CH

RF Exposure Info

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FCCID_3837039

                      FCC §15.247 (i), §2.1091 – RF Exposure

FCC ID: 2APN5SONOFF4CH

Applied procedures / limit
According to FCC §15.247(i) and §1.1307(b)(1), 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 level in excess of the Commission’s guidelines.

                        Limits for Occupational / Controlled Exposure
                    Electric Field     Magnetic Field                        Averaging Time
  Frequency                                              Power Density (S)
                     Strength (E)       Strength (H)                    2      |E|2,|H|2or S
 Range (MHz)                                                 (mW/ cm )
                         (V/m)              (A/m)                               (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
Note: ƒ is frequency in MHz
     * = Power density limit is applicable at frequencies greater than 100 MHz
                  Limits for General Population / Uncontrolled Exposure

                     Electric Field   Magnetic Field                   Averaging Time
   Frequency                                         Power Density (S)
                     Strength (E)      Strength (H)               2     |E|2,|H|2 or S
  Range (MHz)                                           (mW/ cm )
                         (V/m)            (A/m)                          (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


     IEEE 802.11b
    max possible output power (PK,conducted):11±1dbm
    IEEE 802.11g
    max possible output power (PK,conducted):10±1dbm
    IEEE 802.11n(20)
    max possible output power (PK,conducted):10±1dbm
    The max possible output power (PK,conducted) of All (IEEE
    802.11b , IEEE 802.11g, IEEE 802.11n(20)) is IEEE 802.11b.


 MPE PREDICTION

      Predication of MPE limit at a given distance, Equation from OET Bulletin 65, Edition 97-01



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,R=20cm



Test Result of RF Exposure Evaluation


                                  Max
                                           Total Output                Total Power
                 Target power   tune up
                                             power to      Antenna      Density at     Limit
                 W/ tolerance    power                                                          Result
                                             antenna       Gain(dBi)     R=20cm      (mW/cm2)
                    (dBm)       toleranc
                                              (mW)                      (mW/cm2)
                                e (dBm)
                                                          1.0
    802.11b        11±1.0         12         15.85                     0.00397         1.0      Pass
                                                          (1.258)



Document Created: 2019-11-08 17:22:54
Document Modified: 2019-11-08 17:22:54

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