RF Exposure Report

FCC ID: 2AENY349-1351

RF Exposure Info

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FCCID_4504882

RF EXPOSURE EVALUATION

EUT Specification
EUT                           6'' LED Speaker Retrofit Recessed Light
Model Number                  349-1351, RS2764
FCC ID                        2AENY349-1351
Antenna gain (Max)            0dBi
Operation Frequency           2402-2480MHz
Input Rating                  AC 120V/60Hz and 3.7V from battery
Modulation                    GFSK,π/4-DQPSK for BR+EDR
                              GFSK for BLE
Max. output power             2.84dBm(0.001923W) for BR+EDR
                              3dBm(0.001995W) for BLE



Test Requirement:
According to FCC 1.1310: 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)

Limits for Maximum Permissible Exposure (MPE)

Frequency       Electric Field   Magnetic           Power      Average
Range(MHz)      Strength(V/m)      Field      Density(mW/cm )
                                                            2
                                                                Time
                               Strength(A/m)
              (A) Limits for Occupational/Control Exposures
 300-1500           --               --             F/300         6
1500-100000         --               --               5           6
         (B) Limits for General Population/Uncontrol Exposures
 300-1500           --               --            F/1500         6
1500-100000         --               --               1          30


    11.1 Friis transmission formula: Pd= (Pout*G)\ (4*pi*R2)

Where
Pd= Power density in mW/cm2
Pout=output power to antenna in mW
G= Numeric gain of the antenna relative to isotropic antenna
Pi=3.1416
R= distance between observation point and center of the radiator in cm


 Pd the limit of MPE, 1mW/cm2. If we know the maximum gain of the nd total
 power input to the antenna, through the calculation, we will know the distance
 where the MPE limit is reached.


     11.2 Measurement Result
 Antenna gain: 0 dBi

 BR+EDR:
                                                 Antenn                    Power
                     Measu   Tune-     Max
          Channe                                   a        Evaluation     density
                       red     up    tune-up
Mode      l Freq.                                 Gain        result        Limits
                     power   power    power
           (MHz)                                 Numeri     (mW/cm2 )      (mW/c
                     (dBm)   (dBm)    (dBm)
                                                   c                         m2 )
 GFSK         2402   2.6     3±1        4          1         0.000500         1
 GFSK         2441   2.59    3±1        4          1         0.000500         1
 GFSK         2480   2.51    2±1        3          1         0.000397         1
 π/4-
              2402   2.83    3±1        4           1        0.000500        1
DQPSK
 π/4-
              2441     3     3±1        4           1        0.000500        1
DQPSK
 π/4-
              2480   2.87    3±1        4           1        0.000500        1
DQPSK


 BLE:
                                                 Antenn                    Power
                     Measu   Tune-     Max
          Channe                                   a        Evaluation     density
                       red     up    tune-up
Mode      l Freq.                                 Gain        result        Limits
                     power   power    power
           (MHz)                                 Numeri     (mW/cm2 )      (mW/c
                     (dBm)   (dBm)    (dBm)
                                                   c                         m2 )
GFSK          2402   2.35    2±1        3          1         0.000397         1
GFSK          2440   2.42    2±1        3          1         0.000397         1
GFSK          2480   2.84    3±1        4          1         0.000500         1




 Signature:




  Alan He
  Date: 2019-10-10



Document Created: 2019-11-05 10:38:12
Document Modified: 2019-11-05 10:38:12

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