RF exposure letter

FCC ID: 2APXU-ESBR

RF Exposure Info

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                                      FCC ID :2APXU—ESBR


RF EXPOSURE EVALUATION METHOD

SAR Test Exclusion Thresholds for 100 MHz ~ 6 GHz and © 50 mm

Approximate SAR Test Exclusion Power Thresholds xt Selected Frequencies and Test Separation
Distances are illustrated in the following Table.
     wte               s             10           is       20           2s              mm
      150             so             7            16      iss           194
      200             27             5s           a2      110           137
      4so             22             as           67       so           u>
      aas              i6            3            10       6e            2
      900              G             a            a7       e            7o
     1500              12            a            a7       29           a             SAR Test
                                                                                     Exclusion
     en               U10            *            3.       41           5t        Threshold(raw)
     2450                            19           20       38           as
     3600              s             is           24       32           20
     5200              7             13           20       26           3
     5400              6             13           19       26           32
     5eoo          6            12           19           25           a1      |


 The 1—g and 10— SAR test exclusion thrasholds for 100 MHz to 6 GHz at test separation
distances < 50 mm are determined by:
[{max. power of channel, including tune—up tolerance, mW)(min. test separation distance,
mm}] + [/f(GHe)] < 3.0 for 1—g SAR and < 7.5 for 10—4 extremity SAR.where
1(GHz) is the RF channel transmit frequency in GHz
Power and distance are rounded to the nearest mW and mm before calculation
The result is rounded to one decimal place for comparison
The test exclusions are applicable only when the minimum test separation distance is < 50
mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test
separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test
exclusion




      Maximum measured transmitter power.


                              FCC ID :2APXU-ESBR


BLE 4.0 The Worst Case
Mode         2402-2480MHz
Detector     PEAK
GFSK         -2±1dBm


Remark: The worst case gain of the antenna is 1.5dBi.
1.5dBi logarithmic terms convert to numeric result is nearly 1.413.



    Mode       Frequen     Maxinum Peak       Tune up      Tune up     Result       Limit
               cy           Conducted          Power        Power
                 (GHz)     Output Power        (dBm)        (mW)
                              (dBm)
    GFSK         2.402         -1.42             -1          0.794     0.246         3


Threshold at which no SAR required is 0.246≤ 3.0 for 1-g SAR, Separation distance
is 5mm.



Document Created: 2019-06-06 15:31:46
Document Modified: 2019-06-06 15:31:46

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