User Guide

FCC ID: 2AOO4-TZ270
Portable device
According to §15.247(e)(i) and §1.1307(b)(1), systems operating under the provisions of this
section shall be operated in a manner that ensures that the public is not exposed to radio
frequency energy level in excess of the Commission’s guidelines.
According to KDB447498 D01 General RF Exposure Guidance V06
The 1-g SAR 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
When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to
determine SAR test exclusion.
BLE:
Modulation
Channel
Freq.
(GHz)
Conduct
ed power
(dBm)
Conducte
d power
(mW)
Tune-up
power
(dBm)
Max
tune-up
power
(dBm)
Max
tune-up
power
(mW)
Distance
(mm)
Result
calculation
SAR
Exclusion
threshold
SAR test
exclusion
2.402
5.181
3.30 5±1 6 3.98 <5 1.23400 7.50 YES
2.440
6.089
4.06 6±1 7 5.01 <5 1.56576 7.50 YES
2.480
4.67
2.93 5±1 6 3.98 <5 1.25388 7.50 YES
GFSK
Conclusion:
For the max result : 1.56576 ≤ 7.5 for 10-g SAR, No SAR is required.
Signature: Date: 2020-05-14
NAME AND TITLE (Please print or type): Alex li /Manager
COMPANY (Please print or type): Shenzhen NTEK Testing Technology Co., Ltd./ 1/F, Building E,
Fenda Science Park, Sanwei Community, Xixiang Street Bao’an District, Shenzhen P.R. China.