DA149 Wireless Portable Speaker RF Exposure Info RF Exposure Report Shenzhen Tomtop Technology Co., Ltd

Shenzhen Tomtop Technology Co., Ltd Wireless Portable Speaker

FCC ID Filing: 2AIEE-DA149
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RF EXPOSURE EVALUATION
Product Name
Wireless Portable Speaker
Model Name
DA149
FCC ID
2AIEE–DA149
Bluetooth Version
BT4.1+EDR
Operating frequency
2402-2480MHz
Numbers of Channel
79 channels
Antenna Type
PCB Print Antenna
Antenna Gain
2dBi
Type of Modulation
GFSK, Pi/4DQPSK, 8DPSK
Power supply
DC 3.7V, 2000mAh Battery
Hardware Version
N/A
Software Version
4.1
Device category
Portable (<20cm separation)
Standard Requirement
According to § 15.247(i) and § 1.1307b(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 levels in excess of the Commission’s guidelines. See KDB 447498 D01
General RF Exposure Guidance v05, section 4. 3. 1.
The 1-g and 10-g SAR test exclusion thresholds for 100MHz to 6GHz at test separation
distances ≤ 50mm 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 SAR 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.
The test exclusions are applicable only when the minimum test separation distance is ≤
50mm and for transmission frequencies between 100MHz and 6GHz. When the minimum test
separation distance is <5mm, a distance of 5mm is applied to determine SAR test exclusion.
Routine SAR evaluation refers to that specifically required by § 2.1093, using measurements
or computer simulation. When routine SAR evaluation is not required, portable transmitters
with output power greater than the applicable low threshold require SAR evaluation to quality
for TCB approval.
One antenna is available for the EUT (BT product). The minimum separation distance is 5mm.
Channel
Frequency
Measurement Peak Output Power(dBm)
GFSK
Π/4-DQPSK
8DPSK
2402
-0.74
-0.93
-0.91
2441
-1.23
-1.36
-1.38
2480
-1.66
-1.79
-1.80
(MHz)
Channel
Tune up
Frequency
tolerance(d
(MHz)
Bm)
2402
-1±1
2441
Max tune up
Output Peak
Calculation
power (mW)
Result
1.00
0.30997
-1±1
1.00
0.31247
2480
-2±1
-1
0.79
0.24882
2402
-1±1
1.00
0.30997
2441
-1±1
1.00
0.31247
2480
-2±1
-1
0.79
0.24882
2402
-1±1
1.00
0.30997
2441
-1±1
1.00
0.31247
2480
-2±1
-1
0.79
0.24882
conducted
power(dBm)
Limits
According to KDB 447498, no stand-alone required for BT antenna, and no simultaneous SAR
measurement is required.
Signature
yin yao
2017-09-30
Download: DA149 Wireless Portable Speaker RF Exposure Info RF Exposure Report Shenzhen Tomtop Technology Co., Ltd
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Document ID3601644
Application IDvqAkaaDf5W1SdEHrQJDANw==
Document DescriptionRF Exposure Report
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeRF Exposure Info
Display FormatAdobe Acrobat PDF - pdf
Filesize7.37kB (92160 bits)
Date Submitted2017-10-11 00:00:00
Date Available2017-10-12 00:00:00
Creation Date2017-10-11 14:49:09
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Document Lastmod2017-10-11 14:49:09
Document TitleRF Exposure Report
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