2A9SC-ACD3531Wireless Earphones

SHENZHEN MARVO TECHNOLOGY CO., LTD 2.911 (d)(5)(i) Equipment Type Attestation v1.2 Section 2.911(d)(5)(i) Certification – Equipment Type Company name: SHENZHEN MARVO TECHNOLOGY CO., LTD Address: 6thFloor,BuildingA,DongFangYaYuan, ChenTiancommunities, Xixiang, Bao'anDistrict, Shenzhen, China Product Name: Wireless Earphones FCC ID: 2A9SC-ACD3531 Model(s): ACD3531 2.911(d)(5)(i) Equipment Type We, [SHENZHEN MARVO TECHNOLOGY CO., LTD] (“the applicant”) certify that the equipment for which authorization is sought through certification is not:  Prohibited from receiving an equipment authorization pursuant to § 2.903; of the FCC rules.  Identified as an equipment type in the “Covered List” NOTE 1 Yours sincerely, Name: Liao Fancy Date: Aug. 12, 2026 Title: Sales Company name: SHENZHEN MARVO TECHNOLOGY CO., LTD Signature: NOTE 1 “Covered List ”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

SHENZHEN MARVO TECHNOLOGY CO., LTD 2.911 (d)(5)(ii) Applicant Attestation v1.3 Section 2.911(d)(5)(ii) Certification – Applicant (Covered List ) Company name: SHENZHEN MARVO TECHNOLOGY CO., LTD Address: 6thFloor,BuildingA,DongFangYaYuan, ChenTiancommunities, Xixiang, Bao'anDistrict, Shenzhen, China Product Name: Wireless Earphones FCC ID: 2A9SC-ACD3531 Model(s): ACD3531 2.911(d)(5)(ii) Applicant filing We, [SHENZHEN MARVO TECHNOLOGY CO., LTD] (“the applicant”) certify that, as of the date of the filing of the application, the applicant is not identified NOTE 1 on the “Covered List” NOTE 2 , established pursuant to §1.50002 of this chapter, as an entity producing covered communications equipment. Yours sincerely, Name: Liao Fancy Date: Aug. 12, 2026 Title: Sales Company name: SHENZHEN MARVO TECHNOLOGY CO., LTD Signature: NOTE 1 Delete option not applicable to this application. NOTE 2 “Covered List ”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

SHENZHEN MARVO TECHNOLOGY CO., LTD Agent Authorization Company: SHENZHEN MARVO TECHNOLOGY CO., LTD Address: 6thFloor,BuildingA,DongFangYaYuan, ChenTiancommunities, Xixiang, Bao'anDistrict,Shenzhen, China Product Name: Wireless Earphones Model Number(s): ACD3531 Product Description: Wireless Earphones We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: Date: Aug. 12, 2026 Name: Liao Fancy Title: Sales Company: SHENZHEN MARVO TECHNOLOGY CO., LTD

SHENZHEN MARVO TECHNOLOGY CO., LTD Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: Aug. 12, 2026 Subject; Request for Confidentiality FCC ID: 2A9SC-ACD3531 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Liao Fancy Title: Sales

FCC ID LABEL: Ca. 15mm x 4mm Label Location FCC ID: 2A9SC-ACD3531

FCC RF Exposure EUT Description: Wireless Earphones Model No.: ACD3531 FCC ID: 2A9SC-ACD3531 1. Limits According to KDB 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: Result=P/D*√F F= the RF channel transmit frequency in GHz P=Maximum turn‐up power in mw D=Min. test separation distance in mm 2. Test Result of RF Exposure Evaluation Frequency (MHz) Output power (dBm) Tune Up Power (dBm) Max Tune Up power (mW) Min test separation distance (mm) Result Limit SAR Test Exclusion Right 2480 1.37 1±1(2) 1.585 5 0.499 3.0 Pass Left 2441 1.43 1±1(2) 1.585 5 0.495 3.0 Pass Note: PK Output power= conducted power. Conducted power see the test report HK2606250663-1E/2E, Right antenna gain = 2.8dBi, Left antenna gain = 2.8dBi. Per KDB 447498 D01, when the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. The test exclusion threshold is 0.499 which is<= 3, SAR testing is not required. Note: Exclusion Thresholds Results=[(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] ·[√f(GHz)] f(GHz) is the RF channel transmit frequency in GHz Distance=5mm

Page 1 of 50 Report No.: HK2606250663-1E FCC Test Report Test Report On Behalf of SHENZHEN MARVO TECHNOLOGY CO., LTD For Wireless Earphones Model No.: ACD3531 FCC ID: 2A9SC-ACD3531 Prepared For: SHENZHEN MARVO TECHNOLOGY CO., LTD 6thFloor,BuildingA,DongFangYaYuan, ChenTiancommunities, Xixiang, Bao'anDistrict,Shenzhen, China Prepared By: Shenzhen HUAK Testing Technology Co., Ltd. 1-2/F., Building B2, Junfeng Zhongcheng Zhizao Innovation Park, Heping, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Date of Test: Jun. 25, 2026 ~ Jul. 22, 2026 Date of Report: Jul. 22, 2026 Report Number: HK2606250663-1E Page 2 of 50 Report No.: HK2606250663-1E Test Result Certification Applicant’s Name .................. : SHENZHEN MARVO TECHNOLOGY CO., LTD Address .................................. : 6thFloor,BuildingA,DongFangYaYuan, ChenTiancommunities, Xixiang, Bao'anDistrict,Shenzhen, China Manufacturer's Name ........... : SHENZHEN MARVO TECHNOLOGY CO., LTD Address .................................. : 6thFloor,BuildingA,DongFangYaYuan, ChenTiancommunities, Xixiang, Bao'anDistrict,Shenzhen, China Product Description Trade Mark ............................. : AOC Product Name ......................... : Wireless Earphones Model and/or Type Reference : ACD3531 Standards .............................. : 47 CFR FCC Part 15 Subpart C 15.247 This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen HUAK Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen HUAK Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Date of Test ............................................ : Date (s) of Performance of Tests ............ : Jun. 25, 2026 ~ Jul. 22, 2026 Date of Issue ........................................... : Jul. 22, 2026 Test Result ............................................... : Pass Testing Engineer Len Liao Technical Manager Sliver Wan Authorized Signatory Jason Zhou Page 3 of 50 Report No.: HK2606250663-1E Table of Contents Page 1. Summary ................................................................................................... 5 1.1 Test Standards ............................................................................................................ 5 1.2 Test Description .......................................................................................................... 5 1.3 Information of the Test Laboratory .............................................................................. 6 1.4 Statement of the Measurement Uncertainty ................................................................ 6 2. General Information ................................................................................. 7 2.1 Environmental Conditions ........................................................................................... 7 2.2 General Description of EUT ........................................................................................ 7 2.3 Description of Test Modes and Test Frequency .......................................................... 8 2.4 Equipments Used during the Test ............................................................................... 9 2.5 Related Submittal(s) / Grant(s) ................................................................................. 10 2.6 Modifications ............................................................................................................. 10 2.7 Description of Test Setup .......................................................................................... 10 2.8 Description of Support Units ..................................................................................... 11 3. Test Conditions and Results ................................................................. 12 3.1 AC Conducted Emissions Test .................................................................................. 12 3.2 Radiated Emissions .................................................................................................. 15 3.3 Maximum Peak Conducted Output Power ................................................................ 23 3.4 20dB Bandwidth ........................................................................................................ 24 3.5 Frequency Separation .............................................................................................. 28 3.6 Number of Hopping Frequency ................................................................................. 30 3.7 Time of Occupancy (Dwell Time) .............................................................................. 32 3.8 Out-of-Band Emissions ............................................................................................. 36 3.9 Pseudorandom Frequency Hopping Sequence ........................................................ 46 3.10 Antenna Requirement ........................................................................................... 47 4. Test Setup Photos of the EUT ............................................................... 48 5. Photos of the EUT .................................................................................. 50 Page 4 of 50 Report No.: HK2606250663-1E ** Issued History ** Revision Description Issued Date Remark Revision 1.0 Initial Test Report Release Jul. 22, 2026 Jason Zhou Page 5 of 50 Report No.: HK2606250663-1E 1. Summary 1.1 Test Standards The tests were performed according to following standards: FCC Rules Part 15.247: Frequency Hopping, Direct Spread Spectrum and Hybrid Systems that are in operation within the bands of 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz ANSI C63.10: 2020: American National Standard for Testing Unlicensed Wireless Devices 1.2 Test Description FCC PART 15.247 FCC Part 15.207 AC Power Conduc…

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Page 28 of 50 Report No.: HK2606250663-1E 3.5 Frequency Separation Limit Frequency hopping systems shall have hopping channel carrier frequencies separated by minimum of 25 KHz or the 2/3*20dB bandwidth of the hopping channel, whichever is greater. Test Procedure The transmitter output was connected to the spectrum analyzer through an attenuator. The bandwidth of the fundamental frequency was measured by spectrum analyzer with 300 KHz RBW and 1000 KHz VBW. Test Configuration EUT SPECTRUM ANALYZER Test Results Modulation Channel Channel Separation (MHz) Limit(MHz) Result GFSK CH39 1.000 0.640 Pass CH40 π/4DQPSK CH39 1.002 0.900 Pass CH40 8DPSK CH39 0.998 0.870 Pass CH40 Note: We have tested all mode at high, middle and low channel, and recorded worst case at middle Page 29 of 50 Report No.: HK2606250663-1E Test plot as follows: Frequency Separation GFSK π/4DQPSK 8DPSK Page 30 of 50 Report No.: HK2606250663-1E 3.6 Number of Hopping Frequency Limit Frequency hopping systems in the 2400–2483.5 MHz band shall use at least 15 channels. Test Procedure The transmitter output was connected to the spectrum analyzer through an attenuator. Set spectrum analyzer start 2400MHz to 2483.5MHz. Test Configuration EUT SPECTRUM ANALYZER Test Results Modulation Number of Hopping Channel Limit Result GFSK 79 ≥15 Pass π/4DQPSK 79 8DPSK 79 Test plot as follows: Page 31 of 50 Report No.: HK2606250663-1E GFSK Modulation π/4DQPSK Modulation 8DPSK Modulation Page 32 of 50 Report No.: HK2606250663-1E 3.7 Time of Occupancy (Dwell Time) Limit The average time of occupancy on any channel shall not be greater than 0.4 seconds within a period of 0.4 seconds multiplied by the number of hopping channels employed. Test Procedure The transmitter output was connected to the spectrum analyzer through an attenuator. Set center frequency of spectrum analyzer=operating frequency with 1MHz RBW and 3MHz VBW, Span 0Hz. Test Configuration EUT SPECTRUM ANALYZER Test Results Modulation Packet Pulse time (ms) Number of transmission in 31.6s (79 Hopping*0.4)= Burst Count Dwell time (second) Limit (second) Result GFSK DH1 0.405 32 (pulses) *10 = 320 0.130 0.40 PASS DH3 1.661 16 (pulses) *10 = 160 0.266 DH5 2.911 12 (pulses) *10 = 120 0.349 π/4DQPSK 2-DH1 0.415 31(pulses) *10 = 310 0.129 0.40 PASS 2-DH3 1.666 15 (pulses) *10 = 150 0.250 2-DH5 2.915 12 (pulses) *10 = 120 0.350 8DPSK 3-DH1 0.417 32 (pulses) *10 = 320 0.133 0.40 PASS 3-DH3 1.667 16 (pulses) *10 = 160 0.267 3-DH5 2.918 11 (pulses) *10 = 110 0.321 Note: 1. We have tested all mode at high,middle and low channel,and recoreded worst case at middle channel. 2. Dwell time =[Pulse time (ms) /1000] x Burst Count Test plot as follows: Page 33 of 50 Report No.: HK2606250663-1E GFSK Modulation DH1 DH3 DH5 Page 34 of 50 Report No.: HK2606250663-1E π/4DQPSK Modulation 2-DH1 2-DH3 2-DH5 Page 35 of 50 Report No.: HK2606250663-1E 8DPSK Modulation 3-DH1 3-DH3 3-DH5 Page 36 of 50 Report No.: HK2606250663-1E 3.8 Out-of-Band Emissions Limit 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 con-ducted or a radiated measurement, pro-vided the transmitter demonstrates compliance with the peak conducted power limits. If the transmitter com-plies 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. Test Procedure Connect the transmitter output to spectrum analyzer using a low loss RF cable, and set the spectrum analyzer to RBW=100 kHz, VBW= 300 kHz, peak detector , and max hold. Measurements utilizing these setting are made of the in-band reference level, band edge and out-of-band emissions. Test Configuration EUT SPECTRUM ANALYZER Test Results Remark: The measurement frequency range is from 30MHz to the 10th harmonic of the fundamental frequency. The lowest, middle and highest channels are tested to verify the spurious emissions and bandage measurement data. We measured all conditions (DH1, DH3, DH5) and recorded worst case at DH5 and 3DH5 Test plot as follows: Page 37 of 50 Report No.: HK2606250663-1E GFSK CH00 CH39 Page 38 of 50 Report No.: HK2606250663-1E CH78 Page 39 of 50 Report No.: HK2606250663-1E Left Band edge hoping off Right Band edge hoping off Left Band edge hoping on Right Band edge hoping on Page 40 of 50 Report No.: HK2606250663-1E π/4DQPSK CH00 CH39 Page 41 of 50 Report No.: HK2606250663-1E CH78 Page 42 of 50 Report No.: HK2606250663-1E Left Band edge hoping off Right Band edge hoping off Left Band edge hoping on Right Band edge hoping on Page 43 of 50 Report No.: HK2606250663-1E 8DPSK CH00 CH39 Page 44 of 50 Report No.: HK2606250663-1E CH78 Page 45 of 50 Report No.: HK2606250663-1E Left Band edge hoping off Right Band edge hoping off Left Band edge hoping on Right Band edge hoping on Page 46 of 50 Report No.: HK2606250663-1E 3.9 Pseudorandom Frequency Hopping Sequence Test Applicable For 47 CFR Part 15C section 15.247 (a) (1): Frequency hopping systems shall have hopping channel carrier frequencies separated by a minimum of 25 kHz or the 20 dB bandwidth of the hop-ping channel, whichever is greater. Alternatively, frequency hopping systems operating in the 2400–2483.5 MHz band may have hopping channel carrier frequencies that are separated by 25 kHz or two-thirds of the 20 dB bandwidth of the hopping channel, whichever is greater, provided the systems operate with an output power no greater than 125 mW. The system shall hop to channel frequencies that are selected at the system hopping rate from a pseudo randomly ordered list of hopping…

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Page 1 of 50 Report No.: HK2606250663-2E FCC Test Report Test Report On Behalf of SHENZHEN MARVO TECHNOLOGY CO., LTD For Wireless Earphones Model No.: ACD3531 FCC ID: 2A9SC-ACD3531 Prepared For: SHENZHEN MARVO TECHNOLOGY CO., LTD 6thFloor,BuildingA,DongFangYaYuan, ChenTiancommunities, Xixiang, Bao'anDistrict,Shenzhen, China Prepared By: Shenzhen HUAK Testing Technology Co., Ltd. 1-2/F., Building B2, Junfeng Zhongcheng Zhizao Innovation Park, Heping, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Date of Test: Jun. 25, 2026 ~ Jul. 22, 2026 Date of Report: Jul. 22, 2026 Report Number: HK2606250663-2E Page 2 of 50 Report No.: HK2606250663-2E Test Result Certification Applicant’s Name .................. : SHENZHEN MARVO TECHNOLOGY CO., LTD Address .................................. : 6thFloor,BuildingA,DongFangYaYuan, ChenTiancommunities, Xixiang, Bao'anDistrict,Shenzhen, China Manufacturer's Name ........... : SHENZHEN MARVO TECHNOLOGY CO., LTD Address .................................. : 6thFloor,BuildingA,DongFangYaYuan, ChenTiancommunities, Xixiang, Bao'anDistrict,Shenzhen, China Product Description Trade Mark ............................. : AOC Product Name ......................... : Wireless Earphones Model and/or Type Reference : ACD3531 Standards .............................. : 47 CFR FCC Part 15 Subpart C 15.247 This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen HUAK Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen HUAK Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Date of Test ............................................ : Date (s) of Performance of Tests ............ : Jun. 25, 2026 ~ Jul. 22, 2026 Date of Issue ........................................... : Jul. 22, 2026 Test Result ............................................... : Pass Testing Engineer Len Liao Technical Manager Sliver Wan Authorized Signatory Jason Zhou Page 3 of 50 Report No.: HK2606250663-2E Table of Contents Page 1. Summary ................................................................................................... 5 1.1 Test Standards ............................................................................................................ 5 1.2 Test Description .......................................................................................................... 5 1.3 Information of the Test Laboratory .............................................................................. 6 1.4 Statement of the Measurement Uncertainty ................................................................ 6 2. General Information ................................................................................. 7 2.1 Environmental Conditions ........................................................................................... 7 2.2 General Description of EUT ........................................................................................ 7 2.3 Description of Test Modes and Test Frequency .......................................................... 8 2.4 Equipments Used during the Test ............................................................................... 9 2.5 Related Submittal(s) / Grant(s) ................................................................................. 10 2.6 Modifications ............................................................................................................. 10 2.7 Description of Test Setup .......................................................................................... 10 2.8 Description of Support Units ..................................................................................... 11 3. Test Conditions and Results ................................................................. 12 3.1 AC Conducted Emissions Test .................................................................................. 12 3.2 Radiated Emissions .................................................................................................. 15 3.3 Maximum Peak Conducted Output Power ................................................................ 23 3.4 20dB Bandwidth ........................................................................................................ 24 3.5 Frequency Separation .............................................................................................. 28 3.6 Number of Hopping Frequency ................................................................................. 30 3.7 Time of Occupancy (Dwell Time) .............................................................................. 32 3.8 Out-of-Band Emissions ............................................................................................. 36 3.9 Pseudorandom Frequency Hopping Sequence ........................................................ 46 3.10 Antenna Requirement ........................................................................................... 47 4. Test Setup Photos of the EUT ............................................................... 48 5. Photos of the EUT .................................................................................. 50 Page 4 of 50 Report No.: HK2606250663-2E ** Issued History ** Revision Description Issued Date Remark Revision 1.0 Initial Test Report Release Jul. 22, 2026 Jason Zhou Page 5 of 50 Report No.: HK2606250663-2E 1. Summary 1.1 Test Standards The tests were performed according to following standards: FCC Rules Part 15.247: Frequency Hopping, Direct Spread Spectrum and Hybrid Systems that are in operation within the bands of 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz ANSI C63.10: 2020: American National Standard for Testing Unlicensed Wireless Devices 1.2 Test Description FCC PART 15.247 FCC Part 15.207 AC Power Conduc…

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Page 28 of 50 Report No.: HK2606250663-2E 3.5 Frequency Separation Limit Frequency hopping systems shall have hopping channel carrier frequencies separated by minimum of 25 KHz or the 2/3*20dB bandwidth of the hopping channel, whichever is greater. Test Procedure The transmitter output was connected to the spectrum analyzer through an attenuator. The bandwidth of the fundamental frequency was measured by spectrum analyzer with 300 KHz RBW and 1000 KHz VBW. Test Configuration EUT SPECTRUM ANALYZER Test Results Modulation Channel Channel Separation (MHz) Limit(MHz) Result GFSK CH39 1.002 0.638 Pass CH40 π/4DQPSK CH39 1.004 0.906 Pass CH40 8DPSK CH39 1.006 0.860 Pass CH40 Note: We have tested all mode at high, middle and low channel, and recorded worst case at middle Page 29 of 50 Report No.: HK2606250663-2E Test plot as follows: Frequency Separation GFSK π/4DQPSK 8DPSK Page 30 of 50 Report No.: HK2606250663-2E 3.6 Number of Hopping Frequency Limit Frequency hopping systems in the 2400–2483.5 MHz band shall use at least 15 channels. Test Procedure The transmitter output was connected to the spectrum analyzer through an attenuator. Set spectrum analyzer start 2400MHz to 2483.5MHz. Test Configuration EUT SPECTRUM ANALYZER Test Results Modulation Number of Hopping Channel Limit Result GFSK 79 ≥15 Pass π/4DQPSK 79 8DPSK 79 Test plot as follows: Page 31 of 50 Report No.: HK2606250663-2E GFSK Modulation π/4DQPSK Modulation 8DPSK Modulation Page 32 of 50 Report No.: HK2606250663-2E 3.7 Time of Occupancy (Dwell Time) Limit The average time of occupancy on any channel shall not be greater than 0.4 seconds within a period of 0.4 seconds multiplied by the number of hopping channels employed. Test Procedure The transmitter output was connected to the spectrum analyzer through an attenuator. Set center frequency of spectrum analyzer=operating frequency with 1MHz RBW and 3MHz VBW, Span 0Hz. Test Configuration EUT SPECTRUM ANALYZER Test Results Modulation Packet Pulse time (ms) Number of transmission in 31.6s (79 Hopping*0.4)= Burst Count Dwell time (second) Limit (second) Result GFSK DH1 0.407 32 (pulses) *10 = 320 0.130 0.40 PASS DH3 1.663 15 (pulses) *10 = 150 0.249 DH5 2.911 11 (pulses) *10 = 110 0.320 π/4DQPSK 2-DH1 0.417 32(pulses) *10 = 320 0.133 0.40 PASS 2-DH3 1.667 15 (pulses) *10 = 150 0.250 2-DH5 2.916 12 (pulses) *10 = 120 0.350 8DPSK 3-DH1 0.419 32 (pulses) *10 = 320 0.134 0.40 PASS 3-DH3 1.668 16 (pulses) *10 = 160 0.267 3-DH5 2.920 12 (pulses) *10 = 120 0.350 Note: 1. We have tested all mode at high,middle and low channel,and recoreded worst case at middle channel. 2. Dwell time =[Pulse time (ms) /1000] x Burst Count Test plot as follows: Page 33 of 50 Report No.: HK2606250663-2E GFSK Modulation DH1 DH3 DH5 Page 34 of 50 Report No.: HK2606250663-2E π/4DQPSK Modulation 2-DH1 2-DH3 2-DH5 Page 35 of 50 Report No.: HK2606250663-2E 8DPSK Modulation 3-DH1 3-DH3 3-DH5 Page 36 of 50 Report No.: HK2606250663-2E 3.8 Out-of-Band Emissions Limit 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 con-ducted or a radiated measurement, pro-vided the transmitter demonstrates compliance with the peak conducted power limits. If the transmitter com-plies 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. Test Procedure Connect the transmitter output to spectrum analyzer using a low loss RF cable, and set the spectrum analyzer to RBW=100 kHz, VBW= 300 kHz, peak detector , and max hold. Measurements utilizing these setting are made of the in-band reference level, band edge and out-of-band emissions. Test Configuration EUT SPECTRUM ANALYZER Test Results Remark: The measurement frequency range is from 30MHz to the 10th harmonic of the fundamental frequency. The lowest, middle and highest channels are tested to verify the spurious emissions and bandage measurement data. We measured all conditions (DH1, DH3, DH5) and recorded worst case at DH5 and 3DH5 Test plot as follows: Page 37 of 50 Report No.: HK2606250663-2E GFSK CH00 CH39 Page 38 of 50 Report No.: HK2606250663-2E CH78 Page 39 of 50 Report No.: HK2606250663-2E Left Band edge hoping off Right Band edge hoping off Left Band edge hoping on Right Band edge hoping on Page 40 of 50 Report No.: HK2606250663-2E π/4DQPSK CH00 CH39 Page 41 of 50 Report No.: HK2606250663-2E CH78 Page 42 of 50 Report No.: HK2606250663-2E Left Band edge hoping off Right Band edge hoping off Left Band edge hoping on Right Band edge hoping on Page 43 of 50 Report No.: HK2606250663-2E 8DPSK CH00 CH39 Page 44 of 50 Report No.: HK2606250663-2E CH78 Page 45 of 50 Report No.: HK2606250663-2E Left Band edge h…

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