RF Exposure evaluation

FCC ID: BRWMR210

RF Exposure Info

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FCCID_4045941

SAR Evaluation for extremity conditions 1. Extremity exposure conditions Devices that are designed or intended for use on extremities or mainly operated in extremity only exposure conditions; i.e., hands, wrists, feet and ankles, may require extremity SAR evaluation. When the device also operates in close proximity to the user’s body, SAR compliance for the body is also required. The 1-g body and 10-g extremity SAR Test Exclusion Thresholds should be applied to determine SAR test requirements. 2. Standalone SAR test exclusion considerations For FCC: 1) The 1-g and 10-g SAR test exclusion thresholds 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 (GHz ) ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, where  f (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  3.0 and 7.5 are referred to as the numeric thresholds in the step 2 below The test exclusions are applicable only when the minimum test separation distance ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz 2) At 100 MHz to 6 GHz and for test separation distances > 50 mm, the SAR test exclusion threshold is determined according to the following, and as illustrated in Appendix B of KDB 447498  [Power allowed at numeric threshold for 50 mm in step 1) + (test separation distance - 50 mm)·(f(MHz)/150)] mW, at 100 MHz to 1500 MHz  [Power allowed at numeric threshold for 50 mm in step 1) + (test separation distance – 50 mm)·10] mW at > 1500 MHz and ≤ 6 GHz

3. UT Description (worst case) Distance of antenna to extremity exposure positions(mm) Top button 27 For FCC: Conducted Power of EUT Frequency Power Power Tune-up power Tune-up power Test distances Limit (MHz) (dBm) (mW) (dBm) (mW) (mm) (10-g SAR) 2405 18.15 65.31 18.50 70.79 27 4.07 (70.79X√2.405 )/27 =4.07 <7.5 4. Conclusion SAR test for 10-g extremity is exclusion.


Document Created: 2018-10-23 16:33:35
Document Modified: 2018-10-23 16:33:35
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