Test Report BLE

Shenzhen Daiku Technology Co., Ltd. DK69 2BCKX-DK69 2BCKXDK69 dk69

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BSL Testing Co.,LTD.

Report No.: BSL240504175001RF

FCC Part 15C Measurement and Test Report
For
Shenzhen Daiku technology Co., LTD

FCC ID: 2BCKX-DK69

FCC Rule(s):

FCC Part 15.247

Product Description: Tested Model: Report No.: Tested Date: Issued Date:

Smart Watch DK69 BSL240504175001RF May 20~31, 2024 May 31, 2024

Tested By:

Lris Yao / Engineer

Reviewed By:

Levi Xiao / EMC Manager

Approved & Authorized By:

Salon Ouyang / PSQ Manager

Prepared By:

BSL Testing Co.,LTD.

1/F, Building B, Xinshidai GR Park, Shiyan Street,

Bao'an District, Shenzhen, ShiyanStreet, Bao'an District,

Shenzhen,Guangdong,518052,People's Republic of China

Tel: 400-882-9628

Fax: 86- 755-26508703

Report No.: BSL240504175001RF

Page 1 of 32

FCC Part 15.247

BSL Testing Co.,LTD.

Report No.: BSL240504175001RF

TABLE OF CONTENTS
1. GENERAL INFORMATION...................................................................................................................................3
1.1 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT)...............................................................................3 1.2 TEST STANDARDS...................................................................................................................................................4 1.3 TEST METHODOLOGY.............................................................................................................................................4 1.4 TEST FACILITY .......................................................................................................................................................4 1.5 EUT SETUP AND TEST MODE.................................................................................................................................5 1.6 MEASUREMENT UNCERTAINTY ..............................................................................................................................5 1.7 TEST EQUIPMENT LIST AND DETAILS .....................................................................................................................6
2. SUMMARY OF TEST RESULTS ...........................................................................................................................7
3. RF EXPOSURE .........................................................................................................................................................8
3.1 STANDARD APPLICABLE.........................................................................................................................................8 3.2 TEST RESULT..........................................................................................................................................................8
4. ANTENNA REQUIREMENT ..................................................................................................................................9
4.1 STANDARD APPLICABLE.........................................................................................................................................9 4.2 EVALUATION INFORMATION ..................................................................................................................................9
5. POWER SPECTRAL DENSITY ...........................................................................................................................10
5.1 STANDARD APPLICABLE.......................................................................................................................................10 5.2 TEST PROCEDURE.................................................................................................................................................10 5.3 ENVIRONMENTAL CONDITIONS ............................................................................................................................10 5.4 SUMMARY OF TEST RESULTS/PLOTS ....................................................................................................................10
6. 6DB BANDWIDTH .................................................................................................................................................13
6.1 STANDARD APPLICABLE.......................................................................................................................................13 6.2 TEST PROCEDURE.................................................................................................................................................13 6.3 ENVIRONMENTAL CONDITIONS ............................................................................................................................13 6.4 SUMMARY OF TEST RESULTS/PLOTS ....................................................................................................................13
7. RF OUTPUT POWER ............................................................................................................................................16
7.1 STANDARD APPLICABLE.......................................................................................................................................16 7.2 TEST PROCEDURE.................................................................................................................................................16 7.3 ENVIRONMENTAL CONDITIONS ............................................................................................................................16 7.4 SUMMARY OF TEST RESULTS/PLOTS ....................................................................................................................16
8. FIELD STRENGTH OF SPURIOUS EMISSIONS .............................................................................................17
8.1 STANDARD APPLICABLE.......................................................................................................................................17 8.2 TEST PROCEDURE.................................................................................................................................................17 8.3 CORRECTED AMPLITUDE & MARGIN CALCULATION............................................................................................19 8.4 ENVIRONMENTAL CONDITIONS ............................................................................................................................19 8.5 SUMMARY OF TEST RESULTS/PLOTS ....................................................................................................................19
9. OUT OF BAND EMISSIONS.................................................................................................................................28
9.1 STANDARD APPLICABLE.......................................................................................................................................28 9.2 TEST PROCEDURE.................................................................................................................................................28 9.3 ENVIRONMENTAL CONDITIONS ............................................................................................................................29 9.4 SUMMARY OF TEST RESULTS/PLOTS ....................................................................................................................29
10. CONDUCTED EMISSIONS ................................................................................................................................31
10.1 TEST PROCEDURE...............................................................................................................................................31 10.2 BASIC TEST SETUP BLOCK DIAGRAM.................................................................................................................31 10.3 ENVIRONMENTAL CONDITIONS ..........................................................................................................................31 10.4 TEST RECEIVER SETUP .......................................................................................................................................32 10.5 SUMMARY OF TEST RESULTS/PLOTS ..................................................................................................................32 10.6 CONDUCTED EMISSIONS TEST DATA..................................................................................................................32

Report No.: BSL240504175001RF

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FCC Part 15.247

BSL Testing Co.,LTD. 1. GENERAL INFORMATION

Report No.: BSL240504175001RF

1.1 Product Description for Equipment Under Test (EUT)

Client Information Applicant: Address of applicant:
Manufacturer: Address of manufacturer:

Shenzhen Daiku technology Co., LTD 605-606, Building E, Longjing Science Park, 339 Bulong Road, Longgang District, Shenzhen Shenzhen Daiku technology Co., LTD 605-606, Building E, Longjing Science Park, 339 Bulong Road, Longgang District, Shenzhen

General Description of EUT

Product Name:

Smart Watch

Brand Name:

N/A

Models No.:

DK69

Rated Voltage:

DC 3.7V by battery

Note: The test data is gathered from a production sample provided by the manufacturer.

Technical Characteristics of EUT

Bluetooth Version:

V5.0

Frequency Range:

2402-2480MHz

Modulation:

GFSK

Quantity of Channels:

40

Channel Separation:

2MHz

Type of Antenna:

Cable Antenna

Antenna Gain:

1.49dBi

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FCC Part 15.247

BSL Testing Co.,LTD.

Report No.: BSL240504175001RF

1.2 Test Standards
The following report is prepared on behalf of the Shenzhen Daiku technology Co., LTD in accordance with FCC Part 15, Subpart C, and section 15.203, 15.205, 15.207, 15.209 and 15.247 of the Federal Communication Commissions rules.
The objective is to determine compliance with FCC Part 15, Subpart C, and section 15.203, 15.205, 15.207, 15.209 and 15.247 of the Federal Communication Commissions rules.
Maintenance of compliance is the responsibility of the manufacturer. Any modification of the product, which result in lowering the emission, should be checked to ensure compliance has been maintained.
1.3 Test Methodology
All measurements contained in this report were conducted with ANSI C63.10-2013, American National Standard for Testing Unlicensed Wireless Devices, and ANSI C63.4-2014, American National Standard for Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the range of 9 kHz to 40 GHz. The measurement guide KDB 558074 D01 v05r02 for digital transmission systems shall be performed also.
1.4 Test Facility
BSL Testing Co.,LTD. 1/F, Building B, Xinshidai GR Park, Shiyan Street, Bao'an District, Shenzhen, ShiyanStreet, Bao'an District, Shenzhen,Guangdong,518052,People's Republic of China
FCC Test Firm Registration Number: 562200 Designation Number: CN1338
Tel: 400-882-9628 Fax: 86-755-26508703

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FCC Part 15.247

BSL Testing Co.,LTD.

Report No.: BSL240504175001RF

1.5 EUT Setup and Test Mode
The EUT was operated in the engineering mode to fix the Tx frequency that was for the purpose of the measurements. All testing shall be performed under maximum output power condition, and to measure its highest possible emissions level, more detailed description as follows:

Test Mode List Test Mode
TM1

Description GFSK(BLE)

EUT Cable List and Details

Cable Description

Length (m)

/

/

Special Cable List and Details

Cable Description

Length (m)

/

/

Remark 2402MHz, 2440MHz, 2480MHz

Shielded/Unshielded /

With / Without Ferrite /

Shielded/Unshielded /

With / Without Ferrite /

Auxiliary Equipment List and Details

Description

Manufacturer

Model

Serial Number

1.6 Measurement Uncertainty
Measurement uncertainty Parameter
RF Output Power Occupied Bandwidth Power Spectral Density Conducted Spurious Emission Conducted Emissions Transmitter Spurious Emissions

Conditions Conducted Conducted Conducted Conducted Conducted Radiated

Uncertainty ±0.42dB ±1.5% ±1.8dB ±2.17dB ±2.88dB ±5.1dB

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FCC Part 15.247

BSL Testing Co.,LTD.

Report No.: BSL240504175001RF

1.7 Test Equipment List and Details

Description Communication Tester
Spectrum Analyzer Test Receiver
Signal Generator Test Receiver Amplifier Amplifier
Signal Generator Broadband Antenna Biconical and log periodic antennas
Horn Antenna Horn Antenna
LISN LISN 3m Semi-Anechoic Chamber Horn Antenna 20dB Attenuator POWER DIVIDER Power Meter
Loop Antenna Antenna Tower

Manufacturer Rohde & Schwarz
R&S R&S HP R&S Agilent HP IFR SCHAFFNER ELECTRO-METRI CS R&S EM R&S COM-POWER Chengyu Electron
A-INFOMW ICPROBING Mini-circuits
DARE
Schwarz beck SKET

Model CMW500
FSP40 ESCI7 83630B ESPI-3 8449B 8447E 2023A 2774
EM-6917B-1
HF906 EM-6961 ESH3-Z5
LI-115 9 (L)*6 (W)*
6 (H) LB-180400KF
IATS1 PD-2SF-0010 RPR3006W
FMZB 1516 BK-4AT-BS

Serial No. 100358 100550
US47140102 3844A01028
100180 4035A00116 2945A02770 202307/242
2774
171
100253 6462 100196 02027
BSL086
BSL088 BSL1003
N/A 15I00041SN
O03 9773 N/A

Cal Date 2023-10-27 2023-10-27 2023-10-27 2023-10-27 2023-10-27 2023-10-27 2023-10-27 2023-10-27 2023-10-27
2023-10-27
2023-10-27 2023-10-27 2023-10-27 2023-10-27
2023-10-27
2023-10-27 2023-10-27 2023-10-27
2023-10-27
2023-10-27 N/A

Due. Date 2024-10-26 2024-10-26 2024-10-26 2024-10-26 2024-10-26 2024-10-26 2024-10-26 2024-10-26 2024-10-26
2024-10-26
2024-10-26 2024-10-26 2024-10-26 2024-10-26
2024-10-26
2024-10-26 2024-10-26 2024-10-26
2024-10-26
2024-10-26 N/A

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FCC Part 15.247

BSL Testing Co.,LTD. 2. SUMMARY OF TEST RESULTS

Report No.: BSL240504175001RF

FCC Rules
§ 2.1093 §15.203;§15.247(b)(4)(i)
§15.205 §15.207(a) §15.247(e) §15.247(a)(2) §15.247(b)(3) §15.209(a) §15.247(d)

Description of Test Item RF Exposure
Antenna Requirement Restricted Band of Operation
Conducted Emission Power Spectral Density
6 dB Bandwidth RF Output Power Radiated Emission Band Edge (Out of Band Emissions)

Note: PASS: applicable, N/A: not applicable.

Result PASS PASS PASS N/A PASS PASS PASS PASS PASS

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FCC Part 15.247

BSL Testing Co.,LTD. 3. RF Exposure

Report No.: BSL240504175001RF

3.1 Standard Applicable
According to§1.1307 and §2.1093, the portable transmitter must comply the RF exposure requirements.
3.2 Test Result
This product complied with the requirement of the RF exposure, please see the RF Exposure Report.

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FCC Part 15.247

BSL Testing Co.,LTD. 4. Antenna Requirement

Report No.: BSL240504175001RF

4.1 Standard Applicable
According to FCC Part 15.203, an intentional radiator shall be designed to ensure that no antenna other than that furnished by the responsible party shall be used with the device. The use of a permanently attached antenna or of an antenna that uses a unique coupling to the intentional radiator shall be considered sufficient to comply with the provisions of this section.
4.2 Evaluation Information
This product has a Chip antenna(1.49dBi), fulfill the requirement of this section.

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FCC Part 15.247

BSL Testing Co.,LTD. 5. Power Spectral Density

Report No.: BSL240504175001RF

5.1 Standard Applicable
According to 15.247(a)(1)(iii), For digitally modulated systems, the power spectral density conducted from the intentional radiator to the antenna shall not be greater than 8 dBm in any 3 kHz band during any time interval of continuous transmission.
5.2 Test Procedure
According to the KDB 558074 D01 v05r02, the test method of power spectral density as below:

a) Set analyzer center frequency to DTS channel center frequency. b) Set the span to 1.5 times the DTS bandwidth. c) Set the RBW to: 3 kHz  RBW  100 kHz. d) Set the VBW  3 × RBW. e) Detector = peak. f) Sweep time = auto couple. g) Trace mode = max hold. h) Allow trace to fully stabilize. i) Use the peak marker function to determine the maximum amplitude level within the RBW. j) If measured value exceeds limit, reduce RBW (no less than 3 kHz) and repeat.
5.3 Environmental Conditions

Temperature: Relative Humidity: ATM Pressure:

26 C 54 1011 mbar

5.4 Summary of Test Results/Plots

Test Mode GFSK(BLE)

Test Channel MHz 2402
2440
2480

Please refer to the following test plots:

Power Spectral Density dBm/3kHz -14.23
-14.72
-15.66

Limit dBm/3kHz
8
8
8

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FCC Part 15.247

BSL Testing Co.,LTD.
Low Channel

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Middle Channel

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FCC Part 15.247

BSL Testing Co.,LTD.
High Channel

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FCC Part 15.247

BSL Testing Co.,LTD. 6. 6dB Bandwidth

Report No.: BSL240504175001RF

6.1 Standard Applicable
According to 15.247(a)(2). Systems using digital modulation techniques may operate in the 902­928 MHz, 2400­2483.5 MHz, and 5725­5850 MHz bands. The minimum 6 dB bandwidth shall be at least 500 kHz.
6.2 Test Procedure
a) Set RBW = 100 kHz. b) Set the video bandwidth (VBW)  3 × RBW. c) Detector = Peak. d) Trace mode = max hold. e) Sweep = auto couple. f) Allow the trace to stabilize. g) Measure the maximum width of the emission that is constrained by the frequencies associated with the two
outermost amplitude points (upper and lower frequencies) that are attenuated by 6 dB relative to the maximum level measured in the fundamental emission.
6.3 Environmental Conditions

Temperature: Relative Humidity: ATM Pressure:

25 C 53 1018 mbar

6.4 Summary of Test Results/Plots

Test Mode GFSK(BLE)

Test Channel MHz 2402 2440 2480

6 dB Bandwidth kHz 652 647 649

Limit kHz 500 500 500

Please refer to the following test plots:

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FCC Part 15.247

BSL Testing Co.,LTD.
For BLE Low Channel:

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Middle Channel:

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FCC Part 15.247

BSL Testing Co.,LTD.
High Channel:

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FCC Part 15.247

BSL Testing Co.,LTD. 7. RF Output Power

Report No.: BSL240504175001RF

7.1 Standard Applicable
According to 15.247(b)(3). For systems using digital modulation in the 902­928 MHz, 2400­2483.5 MHz, and 5725­5850 MHz bands: 1 Watt.
7.2 Test Procedure
The maximum peak conducted output power may be measured using a broadband peak RF power meter. The power meter shall have a video bandwidth that is greater than or equal to the DTS bandwidth and shall use a fast-responding diode detector.

7.3 Environmental Conditions

Temperature: Relative Humidity: ATM Pressure:

26 C 57 1011 mbar

7.4 Summary of Test Results/Plots

Test Mode GFSK(BLE)

Frequency MHz 2402 2440 2480

Reading dBm 1.51 1.03 -0.01

Output Power mW 1.42 1.27 1.00

Limit mW 1000 1000 1000

Note: the antenna gain of 1.49 dBi less than 6dBi maximum permission antenna gain value based on 1 watt peak output power limit.

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FCC Part 15.247

BSL Testing Co.,LTD. 8. Field Strength of Spurious Emissions

Report No.: BSL240504175001RF

8.1 Standard Applicable
According to §15.247(d), in any 100 kHz bandwidth outside the frequency band in which the spread spectrum or digitally modulated intentional radiator is operating, the radio frequency power that is produced by the intentional radiator shall be at least 20 dB below that in the 100 kHz bandwidth within the band that contains the highest level of the desired power, based on either an RF conducted or a radiated measurement, provided the transmitter demonstrates compliance with the peak conducted power limits. If the transmitter complies with the conducted power limits based on the use of RMS averaging over a time interval, as permitted under paragraph (b)(3) of this section, the attenuation required under this paragraph shall be 30 dB instead of 20 dB. Attenuation below the general limits specified in §15.209(a) is not required. In addition, radiated emissions which fall in the restricted bands, as defined in §15.205(a), must also comply with the radiated emission limits specified in §15.209(a).
The emission limit in this paragraph is based on measurement instrumentation employing an average detector. The provisions in §15.35 for limiting peak emissions apply. Spurious Radiated Emissions measurements starting below or at the lowest crystal frequency.
8.2 Test Procedure
The setup of EUT is according with per ANSI C63.10-2013 measurement procedure. The specification used was with the FCC Part 15.205 15.247(a) and FCC Part 15.209 Limit. The external I/O cables were draped along the test table and formed a bundle 30 to 40 cm long in the middle. The spacing between the peripherals was 10 cm.

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FCC Part 15.247

BSL Testing Co.,LTD.

Report No.: BSL240504175001RF

Antenna Tower

1m-4m 1.5m

3m
EUT SYS

Turntable Table

Frequency :9kHz-30MHz RBW=10KHz, VBW =30KHz Sweep time= Auto Trace = max hold Detector function = peak
Report No.: BSL240504175001RF

Ground Plane
Frequency :30MHz-1GHz RBW=120KHz, VBW=300KHz Sweep time= Auto Trace = max hold Detector function = peak, QP
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To EMI Receiver
Frequency :Above 1GHz RBW=1MHz, VBW=3MHz(Peak), 10Hz(AV) Sweep time= Auto Trace = max hold Detector function = peak, AV
FCC Part 15.247

BSL Testing Co.,LTD.

Report No.: BSL240504175001RF

8.3 Corrected Amplitude & Margin Calculation
The Corrected Amplitude is calculated by adding the Antenna Factor and the Cable Factor, and subtracting the Amplifier Gain from the Amplitude reading. The basic equation is as follows:

Corr. Ampl. = Indicated Reading + Ant. Factor + Cable Loss ­ Ampl. Gain

The "Margin" column of the following data tables indicates the degree of compliance with the applicable limit. For example, a margin of -6dBV means the emission is 6dBV below the maximum limit. The equation for margin calculation is as follows:

Margin = Corr. Ampl. ­ FCC Part 15 Limit
8.4 Environmental Conditions

Temperature: Relative Humidity: ATM Pressure:

25 C 52 1012 mbar

8.5 Summary of Test Results/Plots
According to the data below, the FCC Part 15.205, 15.209 and 15.247 standards, and had the worst cases:
Note: 1. Worst-case radiated emission below 1GHz is GFSK (CH High) mode. 2. Worst-case radiated emission above 1GHz is GFSK (CH Low, Middle, High) mode.

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FCC Part 15.247

BSL Testing Co.,LTD.

The Worst Test Data Below 1GHz GFSK (CH High) mode:

Plot of Radiated Emissions

Test Specification:

Horizontal

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FCC Part 15.247

BSL Testing Co.,LTD.

Test Specification:

Vertical

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FCC Part 15.247

BSL Testing Co.,LTD.

Report No.: BSL240504175001RF

The Worst Spurious Emissions Above 1GHz Transmitting: BLE mode:

Test channel:

Lowest

Peak value:

Frequency (MHz) 2402 4804 7206 9608 2402 4804 7206 9608

Level (dBuV/m)
89.16 40.26 37.91 31.51 88.61 40.15 37.60 31.47

Limit Line (dBuV/m)
74.00 74.00 74.00
74.00 74.00 74.00

Over Limit (dB) -33.74 -36.09 -42.49 -33.85 -36.40 -42.53

Polarization
Vertical Vertical Vertical Vertical Horizontal Horizontal Horizontal Horizontal

Average value:

Frequency (MHz) 2402 4804 7206 9608 2402 4804 7206 9608

Level (dBuV/m)
87.53 38.57 36.14 31.06 86.72 38.43 36.17 30.41

Limit Line (dBuV/m)
54.00 54.00 54.00
54.00 54.00 54.00

Over Limit (dB) -15.43 -17.86 -22.94 -15.57 -17.83 -23.59

Polarization
Vertical Vertical Vertical Vertical Horizontal Horizontal Horizontal Horizontal

Remark: 1. Final Level =Receiver Read level + Antenna Factor + Cable Loss ­ Preamplifier Factor 2. "*", means this data is the too weak instrument of signal is unable to test. 3. The emission from 9 kHz to 30MHz was pre tested and found the result was 20dB lower than the limit, and
the permissible value has no need to be reported. 4. In frequency ranges 18 ~25GHz no any other harmonic emissions detected which are tested to
compliance with the limit. No recording in the test report. No any other emissions level which are attenuated less than 20dB below the limit. No recording in the test report.

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FCC Part 15.247

BSL Testing Co.,LTD.

Report No.: BSL240504175001RF

Test channel:

Middle

Peak value:

Frequency (MHz) 2442 4882 7323 9764 2442 4882 7323 9764

Level (dBuV/m)
87.18 40.24 37.29 31.68 86.75 39.16 37.48 31.46

Limit Line (dBuV/m)
74.00 74.00 74.00
74.00 74.00 74.00

Over Limit (dB) -33.76 -36.71 -42.32 -34.84 -36.52 -42.54

Polarization
Vertical Vertical Vertical Vertical Horizontal Horizontal Horizontal Horizontal

Average value:

Frequency (MHz) 2442 4882 7323 9764 2442 4882 7323 9764

Level (dBuV/m)
86.72 37.16 35.27 30.81 85.42 37.46 35.67 30.47

Limit Line (dBuV/m)
54.00 54.00 54.00
54.00 54.00 54.00

Over Limit (dB) -16.84 -18.73 -23.19 -16.54 -18.33 -23.53

Polarization
Vertical Vertical Vertical Vertical Horizontal Horizontal Horizontal Horizontal

Remark: 1. Final Level =Receiver Read level + Antenna Factor + Cable Loss ­ Preamplifier Factor 2. "*", means this data is the too weak instrument of signal is unable to test. 3. The emission from 9 kHz to 30MHz was pre tested and found the result was 20dB lower than the limit, and
the permissible value has no need to be reported. 4. In frequency ranges 18 ~25GHz no any other harmonic emissions detected which are tested to
compliance with the limit. No recording in the test report. No any other emissions level which are attenuated less than 20dB below the limit. No recording in the test report.

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FCC Part 15.247

BSL Testing Co.,LTD.

Report No.: BSL240504175001RF

Test channel:

Highest

Peak value:

Frequency (MHz) 2480 4960 7440 9920 2480 4960 7440 9920

Level (dBuV/m)
86.76 40.16 37.51 31.48 85.67 40.26 37.51 31.61

Limit Line (dBuV/m)
74.00 74.00 74.00
74.00 74.00 74.00

Over Limit (dB) -33.84 -36.49 -42.52 -33.74 -36.49 -42.39

Polarization
Vertical Vertical Vertical Vertical Horizontal Horizontal Horizontal Horizontal

Average value:

Frequency (MHz) 2480 4960 7440 9920 2480 4960 7440 9920

Level (dBuV/m)
85.71 37.81 35.43 30.49 85.71 37.64 35.49 30.27

Limit Line (dBuV/m)
54.00 54.00 54.00
54.00 54.00 54.00

Over Limit (dB) -16.19 -18.57 -23.51 -16.36 -18.51 -23.73

Polarization
Vertical Vertical Vertical Vertical Horizontal Horizontal Horizontal Horizontal

Remark:

1. Final Level =Receiver Read level + Antenna Factor + Cable Loss ­ Preamplifier Factor 2. "*", means this data is the too weak instrument of signal is unable to test. 3. The emission from 9 kHz to 30MHz was pre tested and found the result was 20dB lower than the limit, and the
permissible value has no need to be reported. 4. In frequency ranges 18 ~25GHz no any other harmonic emissions detected which are tested to compliance with the
limit. No recording in the test report. No any other emissions level which are attenuated less than 20dB below the limit. No recording in the test report.

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FCC Part 15.247

BSL Testing Co.,LTD.
Spurious Emission(Conducted) For BLE Low channel:

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Middle channel:

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FCC Part 15.247

BSL Testing Co.,LTD.
High channel:

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Note: Not recorded emission from 9 KHz to 30 MHz as emission level at least 20dBc lower than emission limit.
Bandedge (Conducted) Lowest Channel:

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FCC Part 15.247

BSL Testing Co.,LTD.
High Channel:

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FCC Part 15.247

BSL Testing Co.,LTD. 9. Out of Band Emissions

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9.1 Standard Applicable

According to §15.247 (d) In any 100 kHz bandwidth outside the frequency band in which the spread spectrum or digitally modulated intentional radiator is operating, the radio frequency power that is produced by the intentional radiator shall be at least 20 dB below that in the 100 kHz bandwidth within the band that contains the highest level of the desired power, based on either an RF conducted or a radiated measurement, provided the transmitter demonstrates compliance with the peak conducted power limits. If the transmitter complies with the conducted power limits based on the use of RMS averaging over a time interval, as permitted under paragraph (b)(3) of this section, the attenuation required under this paragraph shall be 30 dB instead of 20 dB. Attenuation below the general limits specified in §15.209(a) is not required. In addition, radiated emissions which fall in the restricted bands, as defined in §15.205(a), must also comply with the radiated emission limits specified in §15.209(a).
9.2 Test Procedure

According to the KDB 558074 D01 v05r02, the Marker-delta method as follows: for Antenna-port conducted measurement. Antenna-port conducted measurements may also be used as an alternative to radiated measurements for demonstrating compliance in the restricted frequency bands. If conducted measurements are performed, then proper impedance matching must be ensured and an additional radiated test for cabinet/case spurious emissions is required. 1). Check the calibration of the measuring instrument using either an internal calibrator or a known signal from an external generator. 2). Remove the antenna from the EUT and then connect to a low loss RF cable from the antenna port to an EMI test receiver, then turn on the EUT and make it operate in transmitting mode. Then set it to Low Channel and High Channel within its operating range, and make sure the instrument is operated in its linear range. 3). Set both RBW and VBW of spectrum analyzer to 100 kHz with a convenient frequency span including 100kHz bandwidth from band edge, for Radiated emissions restricted band RBW=1MHz, VBW=3MHz for peak detector and RBW=1MHz, VBW=1/B for AV detector. 4). Measure the highest amplitude appearing on spectral display and set it as a reference level. Plot the graph with marking the highest point and edge frequency. 5). Repeat above procedures until all measured frequencies were complete. 6). Measure the conducted output power (in dBm) using the detector specified by the appropriate regulatory agency (see 12.2.2, 12.2.3, and 12.2.4 for guidance regarding measurement procedures for determining quasi-peak, peak, and average conducted output power, respectively). 7). Add the maximum transmit antenna gain (in dBi) to the measured output power level to determine the EIRP level (see 12.2.5 for guidance on determining the applicable antenna gain) 8). Add the appropriate maximum ground reflection factor to the EIRP level (6 dB for frequencies  30 MHz, 4.7 dB for frequencies between 30 MHz and 1000 MHz, inclusive and 0 dB for frequencies > 1000 MHz). 9). For devices with multiple antenna-ports, measure the power of each individual chain and sum the EIRP of all chains in linear terms (e.g., Watts, mW). 10). Convert the resultant EIRP level to an equivalent electric field strength using the following relationship:

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Report No.: BSL240504175001RF

E = EIRP ­ 20log D + 104.77=EIRP+95.23 Where: E = electric field strength in dBV/m, EIRP = equivalent isotropic radiated power in dBm D = specified measurement distance in meters. 11). Since the out-of-band characteristics of the EUT transmit antenna will often be unknown, the use of a conservative antenna gain value is necessary. Thus, when determining the EIRP based on the measured conducted power, the upper bound on antenna gain for a device with a single RF output shall be selected as the maximum in-band gain of the antenna across all operating bands, or 2 dBi, whichever is greater. However, for devices that operate in multiple frequency bands while using the same transmit antenna, the highest gain of the antenna within the operating band nearest in frequency to the restricted band emission being measured may be used in lieu of the overall highest gain when the emission is at a frequency that is within 20 percent of the nearest band edge frequency, but in no case shall a value less than 2 dBi be used. 12). Compare the resultant electric field strength level to the applicable regulatory limit. 13). Perform radiated spurious emission test duress until all measured frequencies were complete.

9.3 Environmental Conditions

Temperature: Relative Humidity: ATM Pressure:

23C 54 1011 mbar

9.4 Summary of Test Results/Plots

Bandedge (Radiated)

GFSK(BLE)
Channel

Freq.(MHz)

LOW (2402MHz)

2391.0

HIGH (2480MHz)

2483.5 2500.0 2483.9

Power(dBm)
-46.52
-46.31 -47.74 -46.34

Gain(dBi)
2.00
2.00 2.00 2.00

Level(dBuV)

Limit(dBuV)

50.71

74.00

50.92 49.49 50.89

74.00 74.00 74.00

Margin(dB)

Detector

-23.29

Peak

-23.08

Peak

-24.51

Peak

-23.11

Peak

Remark: 1. The average measurement was not performed when the peak measured data under the limit of average detection. If the readings given are average, peak measurement should also be supplied.
2. Maximum in-band gain of the antenna across all operating bands, or 2 dBi, whichever is greater.

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Bandedge (Conducted) Lowest Channel:

Report No.: BSL240504175001RF

High Channel:

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BSL Testing Co.,LTD. 10. Conducted Emissions

Report No.: BSL240504175001RF

10.1 Test Procedure
The setup of EUT is according with per ANSI C63.4-2014 measurement procedure. The specification used was with the FCC Part 15.207 Limit. The external I/O cables were draped along the test table and formed a bundle 30 to 40 cm long in the middle. The spacing between the peripherals was 10 cm.
10.2 Basic Test Setup Block Diagram

EUT
LISN

1.0 m

To Receiver

Non-conduction table 1.5 80 cm above GrouMnedter
Plane

10.3 Environmental Conditions

Temperature: Relative Humidity: ATM Pressure:

25 C 52 1012 mbar

1. 5 m

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Report No.: BSL240504175001RF

10.4 Test Receiver Setup
During the conducted emission test, the test receiver was set with the following configurations:
Start Frequency .......................................................................... 150 kHz Stop Frequency .......................................................................... 30 MHz Sweep Speed .............................................................................. Auto IF Bandwidth.............................................................................. 10 kHz Quasi-Peak Adapter Bandwidth ................................................. 9 kHz Quasi-Peak Adapter Mode ......................................................... Normal
10.5 Summary of Test Results/Plots
According to the data in section 10.6, the EUT complied with the FCC Part 15.207 Conducted margin for this device
10.6 Conducted Emissions Test Data
The equipment is battery powered, so do not test this item

***** END OF REPORT *****

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FCC Part 15.247



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