MPE Report

FCC ID: 2ABD3-MS238D0000

RF Exposure Info

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FCCID_3573652

1. MAXIMUM PERMISSIBLE EXPOSURE (MPE)

1.1 Standard Applicable

According to §1.1307(b)(1), system operating under the provisions of this section shall be operating in a manner
that the public is not exposed to radio frequency energy level in excess limit for maximum permissible exposure.

(a) Limits for Occupational / Controlled Exposure


                                Electric Field      Magnetic Field                              Averaging Times
         Frequency range                                                  Power Density
                                Strength (E)         Strength (H)                                | E |2, | H |2 or
             (MHz)                                                        (S) (mW/cm2)
                                   (V/m)                (A/m)                                      S (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
           1500-100000                /                     /                    5                      6


(b) Limits for General Population / Uncontrolled Exposure


                                Electric Field      Magnetic Field                              Averaging Times
         Frequency range                                                  Power Density
                                Strength (E)         Strength (H)                                | E |2, | H |2 or
             (MHz)                                                        (S) (mW/cm2)
                                   (V/m)                (A/m)                                      S (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
           1500-100000                /                     /                    1                     30
       Note: f = frequency in MHz: * = Plane-wave equivalents power density



1.2 MPE Calculation Method

S = (30*P*G) / (377*R2)
S = power density (in appropriate units, e.g., mw/cm2)
P = power input to the antenna (in appropriate units, e.g., mw)
G = power gain of the antenna in the direction of interest relative to an isotropic radiator,
  the power gain factor is normally numeric gain.
R = distance to the center of radiation of the antenna (in appropriate units, e.g., cm)


1.3 MPE Calculation Result

Model No.: Internet Radio with DAB
FCC ID: 2ABD3-MS238D0000
Device category: Mobile device

Wi-Fi
Maximum peak output power: 9.64(dBm)
Maximum peak output power at antenna input terminal: 9.20(mW)
Prediction distance: >20(cm)
Prediction frequency: 2437 (MHz)
Antenna gain: 0(dBi)
Directional gain: 1 (numeric)
The worst case is power density at prediction frequency at 20cm: 0.0018(mw/cm2)
MPE limit for general population exposure at prediction frequency: 1 (mw/cm2)

0.0018(mw/cm2) < 1 (mw/cm2)



Bluetooth
Maximum peak output power: 3.302(dBm)
Maximum peak output power at antenna input terminal: 2.14 (mW)
Prediction distance: >20(cm)
Prediction frequency: 2402 (MHz)
Antenna gain: 0 (dBi)
Directional gain: 1 (numeric)
The worst case is power density at prediction frequency at 20cm: 0.0004(mw/cm2)
MPE limit for general population exposure at prediction frequency: 1 (mw/cm2)

0.0004(mw/cm2) < 1 (mw/cm2)

Bluetooth and Wi-Fi cannot transmit at the same time. So the transmitter complies with the RF exposure
requirements and the SAR is not required.



Document Created: 2017-09-20 20:08:35
Document Modified: 2017-09-20 20:08:35

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