2BCJE-MD559wireless earphones

FCC ID: 2BCJE-MD559 Th is device complies with part 15 of the FCC Rules. O peration is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Any changes or modifications not expressly a pproved by the party responsible for compliance could void the user ’ s authority to operate the equipment. NOTE: T his equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance wit h the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful int erference to radio or television reception, which can be determined by turning the equipment o忏and on, the user is encouraged to try to correct the interference by one or more of the following measures: 一Reorient or relocate the receiving antenna. 一ln crease the separation between the equipment and receiver. 一Connect the equipment into an outlet on a circuit different from t hat to which the receiver is connected. 一Consult the dealer or an experienced radio/TV technician for help. The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without r estriction.

Rev 1/26/2023 Shenzhen Xinke Meida Communication Co., Ltd. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: July 22, 2026 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: 2BCJE-MD559 [Shenzhen Xinke Meida Communication Co., Ltd.] certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. [Shenzhen Xinke Meida Communication Co., Ltd.] certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Device is inherently compliant based on hardware limitations or software controls. or A Software Bill of Materials (SBOM) is provided to the TCB for review, and The end-user or third parties cannot install additional software on this device. Sincerely, (Applicant signature) (Applicant printed name) Jian chu Shen Rev 1/26/2023 Shenzhen Xinke Meida Communication Co., Ltd. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: July 22, 2026 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: 2BCJE-MD559 [Shenzhen Xinke Meida Communication Co., Ltd.] certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Sincerely, (Applicant signature) (Applicant printed name) Jian chu Shen

1/1 USAgentforServiceofProcessLETTEROFATTESTATION TO: OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USAgentforServiceofProcess: CompanyName:HOPEKCORPORATIONINC Address:16755CoyoteBushDrUnit84,SanDiego,CA92127UnitedStates FRN:0034562900 ContactName:YangyangXu TelephoneNo:(561)875-9826 E-mail:[email protected] ThisletteristoconfirmthattheUSAgentforServiceofProcessacceptsresponsibilitytoactas alocalrepresentativeonbehalfofShenzhenXinkeMeidaCommunicationCo.,Ltd. TheUSAgentforServiceofProcessisawareofandagreestocomplywiththerequirements outlinedintheFCCEquipmentAuthorizationProgram,ReportandOrderFCC22-84,andclause §2.911. Applicant: CompanyName:ShenzhenXinkeMeidaCommunicationCo.,Ltd. ProductDescription:wirelessearphones FRN:0034135459 GranteeCode:2BCJE FCCID:2BCJE-MD559 ContactName:JianchuShen Address:Room301,Building1,Zone6,LianheIndustrialZone,NanyueCommunity,Baolong Street,LonggangDistrict,Shenzhen TelephoneNo:+8615900125646 E-mail:[email protected] TheApplicantisawareofandagreestocomplywiththerequirementsoutlinedintheFCC EquipmentAuthorizationProgram,ReportandOrderFCC22-84,andclause§2.911. ThisAgreementisvaliduntil(Permanentlyvalid). Date:2026/8/3 Applicant’sName: ShenzhenXinkeMeidaCommunicationCo., Ltd. USAgentforServiceofProcess’sName: HOPEKCORPORATIONINC Title:ManagerTitle:Manager SignatureSignature

Effective Date: April 2, 2020 QSF 7.6.4-8 – Agent Authorization Letter Template Page 1 of 1 Revision Date: Revision: 0 Shenzhen Xinke Meida Communication Co., Ltd. Date: July 22, 2026 Product Model Number: MD, MINI, MINI13, MINI19, MINI17, MINI15, MD558, MD559, S107, S108, S102, S103, S101, S109, S121, S122, S123, BT, RD, P38, P39, P47, P49, P30, P31, P37 FCC ID: 2BCJE-MD559 To whom it may concern, Re: Product Certification Representative Authorization Letter We authorize QAI Laboratories Ltd. 3980 North Fraser Way, Burnaby B.C. Canada V5J 5K5 to act on our behalf on all matters concerning the above named equipment. This shall include the following:  Testing  Approval applications and procedures We declare that QAI Laboratories Ltd. is allowed to forward all information related to the approval project to the applied certification body and to the notification entities and to discuss any issues concerning the approval application. Any and all acts carried out by QAI Laboratories Ltd. on our behalf shall have the same effect as acts of our own. By: Contact Listed on FCC Wesbite Title: Manager Email: [email protected] Telephone: +86 15900125646 On behalf of: Shenzhen Xinke Meida Communication Co., Ltd.

Shenzhen Xinke Meida Communication Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: August 4, 2026 Subject; Request for Confidentiality FCC ID: 2BCJE-MD559 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 Software Security Requirements for UNII devices 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: Jian chu Shen Title: Manager

Shenzhen Xinke Meida Communication Co., Ltd. Family models declaration letter July 22, 2026 We Shenzhen Xinke Meida Communication Co., Ltd. Of Room 301, Building 1, Zone 6, Lianhe Industrial Zone, Nanyue Community, Baolong Street, Longgang District, Shenzhen Declare under our sole responsibility that the product FCC ID: 2BCJE-MD559 Product: wireless earphones Model Number: MD, MINI, MINI13, MINI19, MINI17, MINI15, MD558, MD559, S107, S108, S102, S103, S101, S109, S121, S122, S123, BT, RD, P38, P39, P47, P49, P30, P31, P37 All the models are the same circuit and module, except the color, appearance shape and model No. Jian chu Shen/ Manager E-mail : [email protected] Phone : +86 15900125646 Fax : +86 15900125646 Address : Room 301, Building 1, Zone 6, Lianhe Industrial Zone, Nanyue Community, Baolong Street, Longgang District, Shenzhen

Ext Photos Model: MD Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 Photo 6 Photo 7 Photo 8

2BCJE-MD559 Due to the small size of the product, the label information is displayed on the outer packaging box.

Int Photos Model: MD Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 Photo 6 ANT

- Page 1 of 9 - Report No.: HB20260716001E-02 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com RF EXPOSURE Test Report Product: wireless earphones Trade Mark: N/A Model Number: MD FCC ID: 2BCJE-MD559 Prepared for Shenzhen Xinke Meida Communication Co., Ltd. Room 301, Building 1, Zone 6, Lianhe Industrial Zone, Nanyue Community, Baolong Street, Longgang District, Shenzhen Prepared by Shenzhen HongBiao Certification& Testing Co., Ltd Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen, China Tel.: +86-755-2998 9321 Fax.: +86-755-2998 5110 Website: http://www.sz-hongbiao.com - Page 2 of 9 - Report No.: HB20260716001E-02 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com Table of Contents 1 GENERAL DESCRIPTION ..................................................................................................................................... 5 1.1 DESCRIPTION OF EUT ................................................................................................................................................ 5 1.2 TEST MODE .............................................................................................................................................................. 5 1.3 TEST SETUP .............................................................................................................................................................. 5 1.4 ANCILLARY EQUIPMENT .............................................................................................................................................. 5 2 TEST FACILITIES AND ACCREDITATIONS .............................................................................................................. 6 2.1 TEST LABORATORY ..................................................................................................................................................... 6 2.2 ENVIRONMENTAL CONDITIONS ..................................................................................................................................... 6 2.3 MEASUREMENT UNCERTAINTY ..................................................................................................................................... 6 2.4 TEST SOFTWARE ........................................................................................................................................................ 6 3 LIST OF TEST EQUIPMENT .................................................................................................................................. 7 4 RF EXPOSURE..................................................................................................................................................... 8 4.1 STANDALONE SAR TEST EXCLUSION CONSIDERATIONS........................................................................................................ 8 4.1.1. Limit ............................................................................................................................................................ 8 4.1.2. Test Procedures ........................................................................................................................................... 8 4.1.3. Test Result ................................................................................................................................................... 9 - Page 3 of 9 - Report No.: HB20260716001E-02 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com TEST RESULT CERTIFICATION Applicant’s Name ................. : Shenzhen Xinke Meida Communication Co., Ltd. Address ................................. : Room 301, Building 1, Zone 6, Lianhe Industrial Zone, Nanyue Community, Baolong Street, Longgang District, Shenzhen Manufacturer's Name .......... : Shenzhen Xinke Meida Communication Co., Ltd. Address ................................. : Room 301, Building 1, Zone 6, Lianhe Industrial Zone, Nanyue Community, Baolong Street, Longgang District, Shenzhen Product description Product name ........................ : wireless earphones Model Number ....................... : MD Standards ............................. : FCC CFR 47 PART 1 , 1.1310 Test procedure ....................... : KDB 447498 D01 General RF Exposure Guidance v06 This device described above has been tested by Shenzhen HongBiao Certification& Testing Co., Ltd and the test results show that the equipment under test (EUT) is in compliance with the EMC requirements. And it is applicable only to the tested sample identified in the report. Date of Test ........................................... : Date (s) of performance of tests ............. : July 16, 2026~July 22, 2026 Test Result .............................................. : Pass Testing Engineer : ( Z o e Su) Technical Manager : (M i n g L i u) Authorized Signatory : (L e o S u) - Page 4 of 9 - Report No.: HB20260716001E-02 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com Revision History Revised No. Date of Issue Description 01 July 22, 2026 Original - Page 5 of 9 - Report No.: HB20260716001E-02 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.…

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2.4GHz 2012 Chip Antenna: RANT2012F245X07 Dimens ion (mm) L2.05+-0.10 W1.20+-0.10 T0.65+-0.10 No.Te rmina l Name 1Fe eding/GNG 2GND Applicati on: WLAN, 802.11b/g, Bluetooth, WLAN, etc... Featu res SMD, high reliability, ultra Impact , Omni-direct ional... Pa rt number Info rmati on RANT2012F245X07 (A)(B)(C)(D)(E)(F) (A)Product Ty peChip Antenna (B) Size Code2.0x1.2mm(+-0.2mm) (C) MaterialHigh K material (D) Fr equency2.4 ~ 2.5GHz (E) Fe eding modePIFA & Single Fe eding (F) Antenna typeType=07 El ectr ical Sp ecifi cati on Worki ng Fr equency Range2400 ~2484 MHz Bandwidth84 (Min.) Peak Gain2.7 dBi (Typ.) Impedance50 Ohm Return loss10 dB ( Min) Polariza tionLinear Azimuth BeamwidthOmni-direct ional Operation Temperature( °C )-40 ~85 °C Resi st ance to Soldering Heats 10se c. ( @ 280°C) Te rminationNi / Au (Leadless) The specification is defined on EVB. Dimension and Terminal Confi gurati on 咏成國際科技有限公司 Phone: 13530576606 RAIN International Te ch nology Co., Ltd. 7 / F, Building F, Zhichuang Park, Tong 'an, Gushu, Shenzhen 2.4GHz 2012 Chip Antenna: RANT2012F245X07 EvaluationBoardReference PCBDimensionAntennaLayoutReferenceUnit:mm ElectricalCharacteristics ReturnLoss ReturnLoss&Radiation 1 Frequency(MHz) S11(dB) 2400-10.77 2450-24.81 2484-10.243 Radiation Z Y X 2400MHz2500MH 2450MHz z Efficiency70.56%75.25%71.01% 2.4GHz 2012 Chip Antenna: RANT2012F245X07 TapingSpecifications ReelandTapingSpecification ReelSpecification TYPESIZEABCD 20127”5K/Reel 9.0±0.5 60±213.5±0.5178±2 TappingSpecification PackagingTypeABWEFGHTDP PaperType2012 1.50±0.202.30±0.208.0±0.201.75±0.103.5±0.054.0±0.102.0±0.050.75±0.101.57±0.104.0±0.1 ReliabilityTabl 2.4GHz 2012 Chip Antenna: RANT2012F245X07 e TestItemProcedure Requirements CeramicType Remark (Reference) Electrical Characterization Fulfilltheelectrical specification UserSpec. Thermal Shock 1.Preconditioning: 50±10°C/1hr,thenkeepfor24±1hrsatroomtemp. 2.Initialmeasure:Spec:referInitialspec. 3.Rapidchangeoftemperaturetest: -30°Cto+85°C;100cycles; 15minutesatLowercategorytemperature; 15minutesatUppercategorytemperature. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 107 Temperature Cycling 1.Initialmeasure:Spec:referInitialspec. 2.100Cycles(-30°Cto+85°C),SoakMode=1(2Cycle/hours). 3.Measurementat24±2Hoursaftertestcondition. NoVisibleDamage. Fulfilltheelectrical specification. JESD22 JA104 HighTemperature Exposure 1.Initialmeasure:Spec:referInitialspec. 2.Unpowered;500hours@T=+85°C. 3.Measurementat24±2hoursaftertest. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 108 LowTemperature Storage 1.Initialmeasure:Spec:referInitialspec. 2.Unpowered:500hours@T=-30°C. 3.Measurementat24±2hoursaftertest. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 108 Solderability (SMDBottomSide) Dippingmethod: a.Temperature:235±5°C b.Dippingtime:3±0.5s Thesoldershouldcover over95%ofthecritical areaofbottomside. IEC60384-21/22 4.10 SolderingHeat Resistance (RSH) Preheatingtemperature:150±10°C. Preheatingtime:1~2min. Soldertemperature:260±5°C. Dippingtime:5±0.5s NoVisibleDamage.IEC60384-21/22 4.10 Vibration5g'sfor20min.,12cycleseachof3orientations Note:Use8"X5"PCB.031"thick7securepointson,onelong sideand2securepointsatcornersofoppositesides.Parts mountedwithin2"fromanysecurepoint.Testfrom10-2000 Hz. NoVisibleDamage.MIL-STD-202 Method204 Mechanical Shock Threeshocksineachdirectionshallbeappliedalongthethree mutuallyperpendicularaxesofthetestspecimen(18shocks) Peakvalue:1,500g’s Duration:0.5ms Velocitychange:15.4ft/s Waveform:Half-sine NoVisibleDamage.MIL-STD-202 Method213 Humidity Bias 1.Humidity:85%R.H.,Temperature:85±2°C. 2.Time:500±24hours. 3.Measurementat24±2hrsaftertestcondition. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 Method106 2.4GHz 2012 Chip Antenna: RANT2012F245X 2.4GHz 2012 Chip Antenna: RANT2012F245X07 07 _ Board Flex (SMD) 1.Mountingmethod: IR-Reflow.PCBSize(L:100×W:40×T:1.6mm) 2.Applytheloadindirectionofthearrowuntilbendingreaches 2mm. NoVisibleDamage.AEC-Q200 005 AdhesionForceof1.8Kgfor60seconds.NoVisibleDamage Magnificationof20Xor greatermaybeemployed forinspectionofthe mechanicalintegrityofthe devicebodyterminalsand body/terminaljunction. AEC-Q200 006 Physical Dimension Anyapplicablemethodusingx10magnification,micrometers, calipers,gauges,contourprojectors,orothermeasuring equipment,capableofdeterminingtheactualspecimen dimensions. Inaccordancewith specification. JESD22 JB100 RevisionHistory RevisionDateContent 1NewDatashee2022/10/15t

- Page 1 of 75 - Report No.: HB20260716001E-01 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com Test Report Product: wireless earphones Trade Mark: N/A Model Number: MD FCC ID: 2BCJE-MD559 Prepared for Shenzhen Xinke Meida Communication Co., Ltd. Room 301, Building 1, Zone 6, Lianhe Industrial Zone, Nanyue Community, Baolong Street, Longgang District, Shenzhen Prepared by Shenzhen HongBiao Certification& Testing Co., Ltd Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen, China Tel.: +86-755-2998 9321 Fax.: +86-755-2998 5110 Website: http://www.sz-hongbiao.com - Page 2 of 75 - Report No.: HB20260716001E-01 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com Table of Contents 1 GENERAL DESCRIPTION ..................................................................................................................................... 6 1.1 DESCRIPTION OF EUT ................................................................................................................................................ 6 1.2 TEST MODE .............................................................................................................................................................. 6 1.3 OPERATION CHANNEL LIST .......................................................................................................................................... 6 1.4 TEST SETUP .............................................................................................................................................................. 7 1.5 POWER SETTING CONFIGURATION PARAMETERS ............................................................................................................... 7 1.6 ANCILLARY EQUIPMENT .............................................................................................................................................. 8 2 SUMMARY OF TEST RESULT ............................................................................................................................... 9 3 TEST FACILITIES AND ACCREDITATIONS .............................................................................................................10 3.1 TEST LABORATORY ................................................................................................................................................... 10 3.2 ENVIRONMENTAL CONDITIONS ................................................................................................................................... 10 3.3 MEASUREMENT UNCERTAINTY ................................................................................................................................... 10 3.4 TEST SOFTWARE ...................................................................................................................................................... 11 4 LIST OF TEST EQUIPMENT .................................................................................................................................12 5 TEST ITEM AND RESULTS ...................................................................................................................................14 5.1 ANTENNA REQUIREMENT .......................................................................................................................................... 14 5.1.1 Standard Requirement ............................................................................................................................. 14 5.1.2 Test Result ................................................................................................................................................. 14 5.2 CONDUCTED EMISSION ............................................................................................................................................. 15 5.2.1 Limits ........................................................................................................................................................ 15 5.2.2 Test Procedures ......................................................................................................................................... 15 5.2.3 Test Setup .................................................................................................................................................. 16 5.2.4 Test Result ................................................................................................................................................. 16 5.3 RADIATED EMISSION ................................................................................................................................................ 19 5.3.1 Limits ........................................................................................................................................................ 19 5.3.2 Test Procedures ......................................................................................................................................... 19 5.3.3 Test Setup .................................................................................................................................................. 19 5.3.4 Test Result ................................................................................................................................................. 20 5.3.5 Radiated Band Edge ................................................................................................................................. 25 5.4 PEAK OUTPUT POWER ..........................................................................................…

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- Page 55 of 75 - Report No.: HB20260716001E-01 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com Dwell NVNT 3-DH5 2441MHz Ant1 One Burst Dwell NVNT 3-DH5 2441MHz Ant1 Accumulated - Page 56 of 75 - Report No.: HB20260716001E-01 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com 5.9 Conducted Band Edge 5.9.1 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 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) (see §15.205(c)). 5.9.2 Test Procedure a) Check the calibration of the measuring instrument using either an internal calibrator or a known signal from an external generator. b) Position the EUT without connection to measurement instrument. Turn on the EUT and connect its antenna terminal to measurement instrument via a low loss cable. Then set it to any one measured frequency within its operating range, and make sure the instrument is operated in its linear range. c) Set RBW to 100 kHz and VBW of spectrum analyzer to 300 kHz with a convenient frequency span including 100 kHz bandwidth from band edge. d) 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. e) Repeat above procedures until all measured frequencies were complete. 5.9.3 Test Setup 5.9.4 Test Results EUT Spectrum Analyzer - Page 57 of 75 - Report No.: HB20260716001E-01 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com EUT: wireless earphones Model Name: MD Pressure: 1012 hPa Test Voltage: DC 3.7V from battery Test plots GFSK: Band Edge, Left Side GFSK: Band Edge, Right Side - Page 58 of 75 - Report No.: HB20260716001E-01 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com π/4-DQPSK: Band Edge, Left Side π/4-DQPSK: Band Edge, Right Side - Page 59 of 75 - Report No.: HB20260716001E-01 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com 8DPSK: Band Edge, Left Side 8DPSK: Band Edge, Right Side - Page 60 of 75 - Report No.: HB20260716001E-01 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com Hopping Mode Test plots GFSK: Band Edge, Left Side GFSK: Band Edge, Right Side - Page 61 of 75 - Report No.: HB20260716001E-01 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com π/4-DQPSK: Band Edge, Left Side π/4-DQPSK: Band Edge, Right Side - Page 62 of 75 - Report No.: HB20260716001E-01 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, T…

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