A026 Portable Speaker RF Exposure Info RF Exposure Letter SHENZHEN AVWOO TECHNOLOGY CO., LTD

SHENZHEN AVWOO TECHNOLOGY CO., LTD Portable Speaker

FCC ID Filing: 2AEDKA026
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Page 1 of A026 Portable Speaker RF Exposure Info RF Exposure Letter SHENZHEN AVWOO TECHNOLOGY CO., LTD

RF Exposure evaluation
FCC ID:2AEDKA026
1. Reference
According to 447498 D01 General RF Exposure Guidance v06
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
and
eirp = pt x gt = (E X d )2 / 30
Where:
pt = transmitter output power in watts,
gt = numeric gain of the transmitting antenna (unitless),
E = electric field strength in V/m, --- 10((dBuV/m)/20)/106
d = measurement distance in meters (m) ---3m
2. Result
As the antenna EUT used was 0dBi and the Max field strength level measured with duty cycle
≥98% in EMI test report, the sar exclusion value can obtained.
According to the formula described above:
Emax=97.33 dBuV/m =0.0735V/m, d=3m, gt=1
Pt=(E x d)2/(30 x gt)=(0.0735x3) )2 / (30x1)= 0.001622W=1.622mW
The value is within the tune up 2±1dBm stated by the manufacturer
Worse case is as below:
Frequency
(MHz)
Field
strength
dBuV/m
TX
Separation
TX
Power
Distance
Power
with
(mm)
(mw)
tune-up
calculated
value
exclusion
thresholds
0.6
(mw)
2480
97.33
1.62
3. Conclusion
The SAR evaluation is not required.
2.00
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Document ID3254133
Application IDd9s3EDHZB3LROtg8gkICug==
Document Description18_A026 RFExp
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeRF Exposure Info
Display FormatAdobe Acrobat PDF - pdf
Filesize7.78kB (97298 bits)
Date Submitted2017-01-10 00:00:00
Date Available2017-01-10 00:00:00
Creation Date2017-01-09 16:55:34
Producing SoftwareAcrobat Distiller 9.0.0 (Windows)
Document Lastmod2017-01-09 16:55:34
Document TitleRF Exposure Letter
Document CreatorPScript5.dll Version 5.2.2
Document Author: Administrator

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