MPE Info

FCC ID: OAYSRR3B

RF Exposure Info

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FCCID_4326924

                                                                                                                                D-PL-12076-01-03




                        Maximum Permissible Exposure (MPE) &
                                             Exposure evaluation


                               Report identification number: 1-4811/17-01-02




                                   Certification numbers and labeling requirements
 FCC ID                                                             OAYSRR3B
 IC number                                                          -/-
 HVIN (Hardware Version Identification Number)                      -/-
 PMN (Product Marketing Name)                                       -/-
 FVIN (Firmware Version Identification Number)                      -/-
 HMN (Host Marketing Name)                                          -/-




This test report is electronically signed and valid without handwriting signature. For verification of the electronic signatures,
the public keys can be requested at the testing laboratory.


                                                                  Document authorized:
                                                                                                  cn=Karsten Geraldy, o=CTC advanced GmbH,
                                                                                                  ou=GER-2017-03-14,
                                                                                                  email=Karsten.Geraldy@ctcadvanced.com, c=DE
                                                                                                  2018.09.06 09:40:57 +02'00'


                                                                   Karsten Geraldy
                                                                   Lab Manager
                                                                   Radio Communications & EMC


           Test report no.: 1-4811/17-01-02



Prediction of MPE limit at given distance - FCC

Equation from page 18 of OET Bulletin 65, Edition 97-01

S = PG / 4π R2

where:   S    = Power density
         P    = Power input to the antenna
         G    = Antenna gain
         R    = Distance to the center of radiation of the antenna
         PG   = EIRP

The table below is excerpted from Table 1B of 47 CFR 1.1310 titled “Limits for Maximum Permissible Exposure
(MPE), Limits for General Population/Uncontrolled Exposure”

      Frequency Range (MHz)                Power Density (mW/cm2)            Averaging Time (minutes)
             300 -1500                             f/1500                               30
           1500 - 100000                             1.0                                30

where f = Frequency (MHz)


Prediction: worst case

         Maximum field strength (worst case = pos-peak)
 E                                                                                   111.5 dBµV/m @3m
         see test report 1-4811/17-01-02-A
 P       Max power input to the antenna                                                     -/- dBm
 G       Antenna gain                                                                        -/- dBi
 PG      EIRP                                                                        16.2 dBm / 42.1 mW
 R       Distance                                                                            20 cm
 S       MPE limit for uncontrolled exposure                                              1 mW/cm2
         Calculated Power Density                                                       0.008 mW/cm2

with EIRP [dBm] = E [dBμV/m] + 20lg(d [m]) - 104.8



Conclusion:
The power density levels for FCC at a distance of ≤20 cm are below the maximum levels allowed by regulations.




                                                 Page 2 of 3


           Test report no.: 1-4811/17-01-02



Prediction of MPE limit at given distance - IC

RSS-102, Issue 5, 2.5.2

RF exposure evaluation is required if the separation distance between the user and/or bystander and the
device’s radiating element is greater than 20 cm, except when the device operates as follows:
        • below 20 MHz and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or less
        than 1 W (adjusted for tune-up tolerance);
        • at or above 20 MHz and below 48 MHz and the source-based, time-averaged maximum e.i.r.p. of the
        device is equal to or less than 4.49/ƒ0.5W (adjusted for tune-up tolerance), where ƒ is in MHz;
        • at or above 48 MHz and below 300 MHz and the source-based, time-averaged maximum e.i.r.p. of the
        device is equal to or less than 0.6 W (adjusted for tune-up tolerance);
        • at or above 300 MHz and below 6 GHz and the source-based, time-averaged maximum e.i.r.p. of the
        device is equal to or less than 1.31 x 10-2 ƒ0.6834 W (adjusted for tune-up tolerance), where ƒ is in MHz;
        • at or above 6 GHz and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or
        less than 5 W (adjusted for tune-up tolerance).


Prediction: worst case

         Maximum field strength (worst case = pos-peak)
 E                                                                                        111.5 dBµV/m @3m
         see test report 1-4811/17-01-02-A
 P       Max power input to the antenna                                                         -/- dBm
 G       Antenna gain                                                                            -/- dBi
 PG      EIRP                                                                            16.2 dBm / 42.1 mW
 R       Distance                                                                                20 cm
 S       MPE limit for uncontrolled exposure                                                  1 mW/cm2
         Calculated Power Density                                                           0.008 mW/cm2

with EIRP [dBm] = E [dBμV/m] + 20lg(d [m]) - 104.8



Conclusion:
For applications where minimum distance to radiating element is ≤20cm, Annex C of RSS-102 should be filled
out.




                                                  Page 3 of 3



Document Created: 2018-09-06 09:40:57
Document Modified: 2018-09-06 09:40:57

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