MPE estimation

FCC ID: OAYSRR5C

RF Exposure Info

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FCCID_4102115

                                                                                                                           D-PL-12076-01-03


      BNetzA-CAB-02/21-102




                         Maximum Permissible Exposure (MPE) &
                                                 Exposure evaluation


                     Report identification number: 1-3483/17-03-13 MPE (FCC_IC)

                                    Certification numbers and labeling requirements
 FCC ID                                                                     OAYSRR5C
 IC number                                                                  4135A-SRR5C
 HVIN (Hardware Version Identification Number)                              SRR5-C
 PMN (Product Marketing Name)                                               SRR520V2
 FVIN (Firmware Version Identification Number)                              -/-
 HMN (Host Marketing Name)                                                  -/-



This 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 authorised:
                              cn=Alexander Hnatovskiy, o=CTC advanced                            cn=Marco Scigliano, o=CTC advanced
                              GmbH, ou=HNA-161129,                                               GmbH, ou=SCI-161125,
                              email=Alexander.Hnatovskiy@ctcadvanced.                            email=marco.scigliano@ctcadvanced.com
                              com, c=DE                                                          , c=DE
                              2018.08.23 13:31:29 +02'00'                                        2018.08.23 13:32:09 +02'00'

Alexander Hnatovskiy                                                      Marco Scigliano
Lab Manager                                                               Testing Manager
Radio Communications & EMC                                                Radio Communications & EMC




© CTC advanced GmbH                                                Page 1 of 3


                                         Report no.: 1-3483/17-03-13


EUT technologies:

     Technologies:           Max. measured EIRP: (AVG)
     76 GHz Radar                    22.6 dBm*

)* worst case for AVG measured EIRP reported in CTC advanced test report 1-3483/17-03-03




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 = Output Power including antenna gain

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

   Frequency (MHz)                                76000
PG max power (EIRP)                                22.6    dBm
R Distance                                          20     cm
S MPE limit for uncontrolled exposure                1     mW/cm2
   Calculated Power density:                      0.0362   mW/cm²
   Calculated percentage of limit:                3.62%

This prediction demonstrates the following:

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




© CTC advanced GmbH                              Page 2 of 3


                                          Report no.: 1-3483/17-03-13


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

    Frequency                                               76000   MHz
P∙G max EIRP                                                 22.6   dBm
R   Distance                                                   20   cm
    Maximum EIRP                                            182.0   mW
    Exclusion Limit from above:                              5.00   W
    Calculated percentage of limit:                          0.04   %

Conclusion: RF exposure evaluation is not required.
            For applications where minimum distance to radiating element is 20cm Annex C of RSS-102
            should be filled out.




© CTC advanced GmbH                              Page 3 of 3



Document Created: 2018-08-23 13:32:09
Document Modified: 2018-08-23 13:32:09

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