MPE bg

FCC ID: NDD9574160804

RF Exposure Info

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FCCID_973723

FCC TEST REPORT                       Report No.: FR822221AC




      Appendix A. Maximum Permissible Exposure




                                      Page No.   : A1 of A3
                                      FCC ID     : NDD9574160804


FCC TEST REPORT                                                                            Report No.: FR822221AC


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        : NDD9574160804


FCC TEST REPORT                                                             Report No.: FR822221AC


1.3. Calculated Result and Limit

    Antenna Type : Dipole
    Max Conducted Power for IEEE 802.11b/g : 18.91dBm
                                                                            Limit of
                                 Peak Output                   Power
     Antenna Gain Antenna Gain                 Peak Output                   Power
                                   Power                     Density (S)                   Test Result
         (dBi)     (numeric)                   Power (mW)                  Density (S)
                                   (dBm)                     (mW/cm²)
                                                                           (mW/cm²)
          3          1.9953        18.9100       77.8037      0.030899          1           Complies




                                                                            Page No.     : A3 of A3
                                                                            FCC ID       : NDD9574160804



Document Created: 2008-05-23 16:37:30
Document Modified: 2008-05-23 16:37:30

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