E22 Bluetooth Earbuds RF Exposure Info RF Exposure My Music Group Limited
My Music Group Limited Bluetooth Earbuds
FCC ID >
FCC ID Filing: QIF-E22
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RF Exposure evaluation Product Description: Bluetooth Earbuds Model Number: E22 FCC ID: QIF-E22 According to 447498 D01 General RF Exposure Guidance v05 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 According to the follow transmitter output power（Pt）formula： Pt=（E x d）2/（30 x gt） Pt=transmitter output power in watts gt=numeric gain of the transmitting antenna (unitess) E=electric field strength in V/m d=measurement distance in meters (m) According to the formula described above: Emax=94.10dBuv/m=0.051V/m, d=3m, gt=1 Pt=（E x d）2/（30 x gt）=(0.051x3)2 / (30x1)=0.0007803W=0.78mW The result is rounded to one decimal place for comparison Worse case is as below: [2441MHz -0.78mW output power] (0.78mW / 5mm)*[√2.441(GHz)] = 0.24mW < 3.0 for 1 - g SAR Then SAR evaluation is not required NOTE: For the maximum power, you can refer FCC test report.
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File Type : PDF File Type Extension : pdf MIME Type : application/pdf PDF Version : 1.5 Linearized : No Page Count : 1 Language : zh-CN Tagged PDF : Yes Author : USER Creator : Microsoft® Office Word 2007 Create Date : 2017:09:01 09:43:43 Modify Date : 2017:09:01 09:43:43 Producer : Microsoft® Office Word 2007