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FCC Test Report

Report No: FCS202103006W01

Issued for

Applicant:

BOJ (HK) INDUSTRIAL & TRADE LIMITED

Address:

Room D9,6/F, Block 2 Camel Paint Building,62 Hoi Yuen

Road, Kwun Tong, Kowloon, Hongkong

Product Name:

TWS earphones

Brand Name:

N/A

Model Name:

Acreo Airbuds

Series Model:

N/A

FCC ID:

2AY3A-A2

Issued By: Flux Compliance Service Laboratory

Add: Room 105 Floor Bao hao Technology Building 1 NO.15 Gong ye West Road Hi-Tech

Industrial, Song shan lake Dongguan

Tel: 769-27280901 Fax:769-27280901 http://www.fcs-lab.com

Summary of content (33 pages)

PAGE 1
FCC Test Report Report No: FCS202103006W01 Issued for Applicant: BOJ (HK) INDUSTRIAL & TRADE LIMITED Address: Room D9,6/F, Block 2 Camel Paint Building,62 Hoi Yuen Road, Kwun Tong, Kowloon, Hongkong Product Name: TWS earphones Brand Name: N/A Model Name: Acreo Airbuds Series Model: N/A FCC ID: 2AY3A-A2 Issued By: Flux Compliance Service Laboratory Add: Room 105 Floor Bao hao Technology Building 1 NO.
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Page 2 of 33 Report No.:FCS202103006W01 TEST RESULT CERTIFICATION Applicant’s Name...................... : BOJ (HK) INDUSTRIAL & TRADE LIMITED Address...................................... : Room D9,6/F, Block 2 Camel Paint Building,62 Hoi Yuen Road, Kwun Tong, Kowloon, Hongkong Manufacture's Name................ : BOJ (HK) INDUSTRIAL & TRADE LIMITED Address......................................
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Page 3 of 33 Report No.:FCS202103006W01 Table of Contents 1. SUMMARY OF TEST RESULTS Page 5 1.1 TEST FACTORY 6 1.2 MEASUREMENT UNCERTAINTY 6 2. GENERAL INFORMATION 7 2.1 GENERAL DESCRIPTION OF THE EUT 7 2.2 DESCRIPTION OF THE TEST MODES 9 2.3 DESCRIPTION OF NECESSARY ACCESSORIES AND SUPPORT UNITS 10 2.4 EQUIPMENTS LIST 11 3 CONDUCTED EMISSION MEASUREMENT 12 3.1 LIMIT 12 3.2 TEST PROCEDURE 12 3.3 TEST SETUP 13 3.4 TEST RESULTS 14 4. RADIATED EMISSION MEASUREMENT 16 4.
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Page 4 of 33 Report No.:FCS202103006W01 Revision History Rev. Issue Date Effect Page Contents 00 18 Mar, 2021 All Initial Issue Flux Compliance Service Laboratory Room 105 Floor Bao hao Technology Building 1 NO.15 Gong ye West Road Hi-Tech Industrial, Song shan lake Dongguan Tel: 769-27280901 Fax:769-27280901 http://www.fcs-lab.
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Page 5 of 33 Report No.:FCS202103006W01 1. SUMMARY OF TEST RESULTS FCC Part 15.249,Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS -- 15.205(a), 15.209(a), 15.249(a), 15.249(c) Radiated Spurious Emission PASS -- 15.209 Field strength of fundamental PASS 15.249(d) Band Edge Emission PASS -- 15.215(c) 20dB Bandwidth PASS -- 15.
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Page 6 of 33 Report No.:FCS202103006W01 1.1 TEST FACTORY Company Name: Flux Compliance Service Laboratory Address: Room 105 Floor Bao hao Technology Building 1 NO.15 Gong ye West Road Hi-Tech Industrial, Song shan lake Dongguan Telephone: +86-769-27280901 Fax: +86-769-27280901 FCC Test Firm Registration Number: 514908 Designation number: CN0127 A2LA accreditation number：5545.01 1.
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Page 7 of 33 Report No.:FCS202103006W01 2. GENERAL INFORMATION 2.1 GENERAL DESCRIPTION OF THE EUT Product Name TWS earphones Trade Name N/A Model Name Acreo Airbuds Series Model N/A Model Difference N/A Channel List Please refer to the Note 2. BT Frequency:2402-2480MHz Modulation: GFSK Data rate: 1Mbps Channel number: 79CH Power Supply DC 3.7V Hardware version number V1.0 Software version number V1.0 Connecting I/O Port(s) Please refer to the User's Manual Note: 1.
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Page 8 of 33 Report No.:FCS202103006W01 2. Channel List 3. Table for Filed Antenna Ant. Brand Model Name Antenna Type Connector Gain (dBi) 1 NA JHGF Chip Antenna N/A 1.0 Flux Compliance Service Laboratory Room 105 Floor Bao hao Technology Building 1 NO.15 Gong ye West Road Hi-Tech Industrial, Song shan lake Dongguan Tel: 769-27280901 Fax:769-27280901 http://www.fcs-lab.
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Page 9 of 33 Report No.:FCS202103006W01 2.2 DESCRIPTION OF THE TEST MODES To investigate the maximum EMI emission characteristics generates from EUT, the test system was pre-scanning tested base on the consideration of following EUT operation mode or test configuration mode which possible have effect on EMI emission level. Each of these EUT operation mode(s) or test configuration mode(s) mentioned above was evaluated respectively.
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Page 10 of 33 Report No.:FCS202103006W01 2.3 DESCRIPTION OF NECESSARY ACCESSORIES AND SUPPORT UNITS The EUT has been tested as an independent unit together with other necessary accessories or support units. The following support units or accessories were used to form a representative test configuration during the tests. Necessary accessories Item Equipment Mfr/Brand Model/Type No. Serial No. Note Support units Item Equipment Mfr/Brand Model/Type No. Serial No.
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Page 11 of 33 Report No.:FCS202103006W01 2.4 EQUIPMENTS LIST Radiation Test equipment Kind of Equipment Manufacturer Type No. EMI Test Receiver R&S ESRP 3 FCS-E001 2020. 06.26 2021. 06.25 Signal Analyzer R&S FSV40-N FCS-E012 2020.06.05 2021.06.04 Active loop Antenna ZHINAN ZN30900C FCS-E013 2020.08.09 2021.08.10 Bilog Antenna SCHWARZBECK VULB 9168 FCS-E002 2020.08.26 2021.08.25 Horn Antenna SCHWARZBECK BBHA 9120D FCS-E003 2020.08.26 2021.08.
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Page 12 of 33 Report No.:FCS202103006W01 3 CONDUCTED EMISSION MEASUREMENT 3.1 LIMIT Operating frequency band. In case the emission fall within the restricted band specified on Part 207(a) limit in the table below has to be followed. Conducted Emissionlimit (dBuV) FREQUENCY (MHz) Quasi-peak Average 0.15 -0.5 66 - 56 * 56 - 46 * 0.50 -5.0 56.00 46.00 5.0 -30.0 60.00 50.00 Note: (1) The tighter limit applies at the band edges.
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Page 13 of 33 Report No.:FCS202103006W01 3.3 TEST SETUP Flux Compliance Service Laboratory Room 105 Floor Bao hao Technology Building 1 NO.15 Gong ye West Road Hi-Tech Industrial, Song shan lake Dongguan Tel: 769-27280901 Fax:769-27280901 http://www.fcs-lab.
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Page 14 of 33 Report No.:FCS202103006W01 3.4 TEST RESULTS Temperature: 25℃ Relative Humidity: 50% Test Mode: GFSK Test Voltage: DC 3.7V Phase: L Result: Pass No. Frequency Reading Correct Result Limit Margin (MHz) (dBuV) Factor(dB/m) (dBuV/m) (dBuV/m) (dB) 1 0.1725 35.23 9.78 45.01 64.84 19.83 QP 2 0.1725 16.54 9.78 26.32 54.84 28.52 AVG 3 0.7125 34.88 9.89 44.77 56.00 11.23 QP 4 0.7125 25.94 9.89 35.83 46.00 10.17 AVG 5 1.4460 22.70 12.15 34.
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Page 15 of 33 Report No.:FCS202103006W01 Temperature: 25℃ Relative Humidity: 50% Test Mode: GFSK Test Voltage: DC 3.7V Phase: N Result: Pass No. Frequency Reading Correct Result Limit Margin (MHz) (dBuV) Factor(dB/m) (dBuV/m) (dBuV/m) (dB) 1 0.7170 37.62 9.89 47.51 56.00 8.49 QP 2 0.7170 25.83 9.89 35.72 46.00 10.28 AVG 3 1.2255 27.13 11.05 38.18 56.00 17.82 QP 4 1.2255 14.70 11.05 25.75 46.00 20.25 AVG 5 2.0175 23.93 14.96 38.89 56.00 17.
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Page 16 of 33 Report No.:FCS202103006W01 4. RADIATED EMISSION MEASUREMENT 4.1 LIMIT In any 100 kHz bandwidth outside the operating frequency band. In case the emission fall within the Restricted band specified on Part15.205(a)&209(a) limit in the table and according to ANSI C63.10-2013 below has to be followed LIMITS OF RADIATED EMISSION MEASUREMENT (0.009mhz - 1000mhz) Frequencies Field Strength Measurement Distance (MHz) (micorvolts/meter) (meters) 0.009~0.490 2400/F(KHz) 300 0.490~1.
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Page 17 of 33 Report No.:FCS202103006W01 4.2 TEST PROCEDURE Spectrum Parameter Setting Attenuation Auto Detector Peak/AV Start Frequency 1000 MHz(Peak/AV) Stop Frequency 10th carrier hamonic(Peak/AV) RB / VB (emission in restricted PK=1MHz / 1MHz, AV=1 MHz /10 Hz band) (Peak detector is for Both) a. The measuring distance of at 3 m shall be used for measurements at frequency 0.009MHz up to 1GHz,and above 1GHz. b. The EUT was placed on the top of a rotating table 0.8 meters (above 1GHz is 1.
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Page 18 of 33 Report No.:FCS202103006W01 4.3 TEST SETUP （A）Radiated Emission Test-Up Frequency Below 30MHz （B）Radiated Emission Test-Up Frequency 30MHz~1GHz （C）Radiated Emission Test-Up Frequency Above 1GHz Flux Compliance Service Laboratory Room 105 Floor Bao hao Technology Building 1 NO.15 Gong ye West Road Hi-Tech Industrial, Song shan lake Dongguan Tel: 769-27280901 Fax:769-27280901 http://www.fcs-lab.
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Page 19 of 33 Report No.:FCS202103006W01 4.4 TEST RESULTS Temperature: 25℃ Relative Humidity: 60% Test Mode: GFSK Mode Test Voltage: DC 3.7V For field strength of the fundamental signal Peak value Average value For spurious emission (9KHz-30MHz) Freq.
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Page 20 of 33 Report No.:FCS202103006W01 (30MHZ-1000MHZ) Temperature: 23.7℃ Relative Humidity: 61% Test Voltage: DC 3.7V Phase: Horizontal Test Mode: GFSK No. 1 2 3 4 5 6 Frequency (MHz) 30.2111 66.9670 162.0414 205.6751 355.4273 556.7744 Reading (dBuV) 33.19 31.33 31.44 31.50 31.07 31.05 Correction (dB/m) -16.70 -19.31 -18.91 -18.47 -18.59 -17.89 Result (dBuV/m) 16.49 12.02 12.53 13.03 12.48 13.16 Limit (dBuV/m) 40.00 40.00 43.50 43.50 46.00 46.00 Margin (dB) -23.51 -27.98 -30.
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Page 21 of 33 Report No.:FCS202103006W01 Temperature: 22.7℃ Relative Humidity: 61% Test Voltage: DC 3.7V Phase: Vertical Test Mode: GFSK No. 1 2 3 4 5 6 Frequency (MHz) 30.7455 61.1316 162.0414 355.4273 562.6624 866.0880 Reading (dBuV) 33.00 30.08 28.71 28.66 26.34 22.31 Correction (dB/m) -16.87 -17.59 -16.18 -16.18 -12.52 -8.90 Result (dBuV/m) 16.13 12.49 12.53 12.48 13.82 13.41 Limit (dBuV/m) 40.00 40.00 43.50 46.00 46.00 46.00 Margin (dB) -23.87 -27.51 -30.97 -33.52 -32.18 -32.
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Page 22 of 33 Report No.:FCS202103006W01 (1GHZ~25GHZ) LOW CH(GFSK) Peak value AV value Flux Compliance Service Laboratory Room 105 Floor Bao hao Technology Building 1 NO.15 Gong ye West Road Hi-Tech Industrial, Song shan lake Dongguan Tel: 769-27280901 Fax:769-27280901 http://www.fcs-lab.
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Page 23 of 33 Report No.:FCS202103006W01 MIDDLE CH(GFSK) Peak value AV value Flux Compliance Service Laboratory Room 105 Floor Bao hao Technology Building 1 NO.15 Gong ye West Road Hi-Tech Industrial, Song shan lake Dongguan Tel: 769-27280901 Fax:769-27280901 http://www.fcs-lab.
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Page 24 of 33 Report No.:FCS202103006W01 HIGH CH(GFSK) Peak value AV value Flux Compliance Service Laboratory Room 105 Floor Bao hao Technology Building 1 NO.15 Gong ye West Road Hi-Tech Industrial, Song shan lake Dongguan Tel: 769-27280901 Fax:769-27280901 http://www.fcs-lab.
PAGE 25
Page 25 of 33 Report No.:FCS202103006W01 5. BAND EDGE TEST 5.1 LIMIT According to §15.249(d), Emissions radiated outside of the specified frequency bands, except for harmonics, shall be attenuated by at least 50 dB below the level of the fundamental or to the general radiated emission limits in §15.209, whichever is the lesser attenuation. 5.2 TEST PROCEDURE a. b. The EUT is placed on a turntable, which is 1.5m above ground plane.
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Page 26 of 33 Report No.:FCS202103006W01 5.3 TEST SETUP Radiated Emission Test-Up Frequency Above 1GHz Flux Compliance Service Laboratory Room 105 Floor Bao hao Technology Building 1 NO.15 Gong ye West Road Hi-Tech Industrial, Song shan lake Dongguan Tel: 769-27280901 Fax:769-27280901 http://www.fcs-lab.
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Page 27 of 33 Report No.:FCS202103006W01 5.4 TEST RESULTS Low CH (GFSK) Flux Compliance Service Laboratory Room 105 Floor Bao hao Technology Building 1 NO.15 Gong ye West Road Hi-Tech Industrial, Song shan lake Dongguan Tel: 769-27280901 Fax:769-27280901 http://www.fcs-lab.
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Page 28 of 33 Report No.:FCS202103006W01 High CH(GFSK) Flux Compliance Service Laboratory Room 105 Floor Bao hao Technology Building 1 NO.15 Gong ye West Road Hi-Tech Industrial, Song shan lake Dongguan Tel: 769-27280901 Fax:769-27280901 http://www.fcs-lab.
PAGE 29
Page 29 of 33 Report No.:FCS202103006W01 Flux Compliance Service Laboratory Room 105 Floor Bao hao Technology Building 1 NO.15 Gong ye West Road Hi-Tech Industrial, Song shan lake Dongguan Tel: 769-27280901 Fax:769-27280901 http://www.fcs-lab.
PAGE 30
Page 30 of 33 Report No.:FCS202103006W01 6. 20 DB BANDWIDTH TEST 6.1 LIMIT According to 15.215 (c) Intentional radiators operating under the alternative provisions to the general emission limits, as contained in § 15.217 through 15.
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Page 31 of 33 Report No.:FCS202103006W01 6.4 TEST RESULTS Temperature: 25℃ Relative Humidity: 50% Test Mode: GFSK Test Voltage: DC 3.7V Frequency 20dB Bandwidth (MHz) Result 2402 MHz 1.355 PASS 2441 MHz 1.351 PASS 2480 MHz 1.335 PASS Flux Compliance Service Laboratory Room 105 Floor Bao hao Technology Building 1 NO.15 Gong ye West Road Hi-Tech Industrial, Song shan lake Dongguan Tel: 769-27280901 Fax:769-27280901 http://www.fcs-lab.
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Page 32 of 33 Report No.:FCS202103006W01 Flux Compliance Service Laboratory Room 105 Floor Bao hao Technology Building 1 NO.15 Gong ye West Road Hi-Tech Industrial, Song shan lake Dongguan Tel: 769-27280901 Fax:769-27280901 http://www.fcs-lab.
PAGE 33
Page 33 of 33 Report No.:FCS202103006W01 7. ANTENNA REQUIREMENT 7.1 STANDARD REQUIREMENT 15.203 requirement: For intentional device, according to 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. 7.2 EUT ANTENNA The antennas used for this product are Chip antenna and other than that furnished by the responsible party shall be used with the device, the maximum peak gain of the transmit antenna is 1.