2AKS8DX-BT04-EBluetooth module

2021-03-02 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID:2AKS8DX-BT04-E Product Name:Bluetooth module Model name: DX-BT04-E Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the commissions rules, we hereby request that the following documents be held confidential: (List here the documents for which you are seeking confidentiality – for example ...) •Schematics •Block diagram •Operation description These materials contain trade secrets and proprietary information and are not customarily released to the public. The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors. Sincerely, Name: zhou guanzhi Title: Sales Manager Company: SHEN ZHEN DX-SMART TECHNOLOGY CO., LTD

2021-03-02 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 Authority to Act as Agent On our behalf, I appoint Shenzhen STS Test Services Co., Ltd., 1/F., Building B, Zhuoke Science Park, No.190, Chongqing Road, Fuyong Street, Bao’an District, Shenzhen, Guangdong,China (Name of Agent company name and address) to act as our agent in the preparation of this application for equipment certification. I certify that submitted documents properly describe the device or system for which equipment certification is sought. I also certify that each unit manufactured, imported or marketed, as defined in the Federal Communications Commission’s regulations will have affixed to it a label identical to that submitted for approval with this application. For instances where our authorized agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for certification, still resides with SHEN ZHEN DX-SMART TECHNOLOGY CO.,LTD 601, Room 601, Block A1, Huafeng Zhigu, Hangkong Road, Baoan District, Shenzhen, China (Applicant Name and address) Sincerely, Name: zhou guanzhi Title: Sales Manager Company: SHEN ZHEN DX-SMART TECHNOLOGY CO., LTD

Compliancelist INTEGRATIONINSTRUCTIONSfor 996369D03 OEM the and 996369D03 OEM by Sections2.2 through2.10. RequirementYesN/AComment 2.2 List of applicableFCC rules List the FCC rulesthat are applicableto the modulartransmitter.Theseare the rulesthat specificallyestablishthe bandsof operation, the power,spuriousemissions,and operating fundamentalfrequencies.DO NOT list complianceto unintentional-radiatorrules (Part15 SubpartB) sincethat is not a conditionof a modulegrantthat is extended to a host manufacturer.See also Section2.10 belowconcerningthe needto notifyhost manufacturersthat furthertestingis required.3 YESReferto instruction FCC standards:FCC CFR Title 47 Part 15 SubpartC Section15.247 2.3 Summarizethe specificoperationaluse conditions Describeuse conditionsthat are applicableto the modulartransmitter,includingfor exampleany limitson antennas,etc. For example,if point-to-pointantennasare used that requirereductionin poweror compensationfor cableloss, thenthis informationmustbe in the instructions.If the use conditionlimitationsextendto professionalusers,theninstructionsmust statethat this informationalso extendsto the host manufacturer’s instructionmanual.In addition,certaininformationmay also be needed,suchas peakgain per frequencyband and minimumgain,specificallyfor master devicesin 5 GHz DFS bands. YES Refer to instruction Integral antenna with antenna gain 0dBi 2.4 Limitedmoduleprocedures If a modulartransmitteris approvedas a “limitedmodule,” thenthemodule manufactureris responsibleforapprovingthe hostenvironmentthatthelimitedmoduleis usedwith.Themanufacturerof a limited modulemustdescribe,bothin thefilingandin theinstallationinstructions,thealternative meansthatthelimitedmodulemanufacturer usesto verifythatthehostmeetsthenecessary requirementsto satisfythemodulelimiting conditions. A limitedmodulemanufacturerhasthe flexibilityto defineits alternativemethodto addresstheconditionsthatlimittheinitial approval,suchas:shielding,minimum N/ANot applicable signalingamplitude,bufferedmodulation/data inputs,orpowersupplyregulation.The alternativemethodcouldincludethatthe limitedmodulemanufacturerreviewsdetailed testdataorhostdesignspriortogivingthehost manufacturerapproval. Thislimitedmoduleprocedureisalso applicableforRFexposureevaluationwhenit isnecessarytodemonstratecomplianceina specifichost.Themodulemanufacturermust statehowcontroloftheproductintowhichthe modulartransmitterwillbeinstalledwillbe maintainedsuchthatfullcomplianceofthe productisalwaysensured.Foradditionalhosts otherthanthespecifichostoriginallygranted withalimitedmodule,aClassIIpermissive changeisrequiredonthemodulegrantto registertheadditionalhostasaspecifichost alsoapprovedwiththemodule. 2.5Traceantennadesigns Foramodulartransmitterwithtraceantenna designs,seetheguidanceinQuestion11of KDBPublication996369D02FAQ–Modules forMicro-StripAntennasandtraces.The integrationinformationshallincludeforthe TCBreviewtheintegrationinstructionsforthe followingaspects:layoutoftracedesign,parts list(BOM),antenna,connectors,andisolation requirements.4 a)Informationthatincludespermitted variances(e.g.,traceboundarylimits, thickness,length,width,shape(s),dielectric constant,andimpedanceasapplicableforeach typeofantenna); b)Eachdesignshallbeconsidereda differenttype(e.g.,antennalengthin multiple(s)offrequency,thewavelength,and antennashape(tracesinphase)canaffect antennagainandmustbeconsidered); c)Theparametersshallbeprovidedin amannerpermittinghostmanufacturersto designtheprintedcircuit(PC)boardlayout; d)Appropriatepartsbymanufacturer andspecifications; e)Testproceduresfordesign verification;and N/ANotapplicable f) Productiontestproceduresfor ensuringcompliance. The modulegranteeshallprovidea noticethat any deviation(s)fromthe defined parametersof the antennatrace,as described by the instructions,requirethat the host productmanufacturermustnotifythe module granteethat theywishto changethe antenna tracedesign.In this case,a ClassII permissive changeapplicationis requiredto be filed by the grantee,or the host manufacturercan take responsibilitythroughthe changein FCC ID (newapplication)procedurefollowedby a ClassII permissivechangeapplication. 2.6 RF exposureconsiderations It is essentialfor modulegranteesto clearly and explicitlystatethe RF exposureconditions that permita host productmanufacturerto use the module.Two typesof instructionsare requiredfor RF exposureinformation:(1) to the host productmanufacturer,to definethe applicationconditions(mobile,portable– xx cm froma person’s body);and (2) additional text neededfor the host product manufacturerto provideto end usersin their end-productmanuals.If RF exposure statementsand use conditionsare not provided,thenthe host productmanufacturer is requiredto take responsibilityof the modulethrougha changein FCC ID (new application). YESReferto instruction This modularcomplieswithFCC RF radiationexposurelimitsset forthfor an uncontrolledenvironment. 2.7 Antennas A listof antennasincludedin theapplication forcertificationmustbe providedin the instructions.Formodulartransmitters approvedas limitedmodules,all applicable professionalinstallerinstructionsmustbe includedas partof theinformationto thehost productmanufacturer.Theantennalistshall alsoidentifytheantennatypes(monopole, PIFA,dipole,etc.(notethatforexamplean “omni-directionalantenna” is notconsideredto be a specific“antennatype”)). Forsituationswherethehostproduct manufactureris responsibleforan external connector,forexamplewithan RFpinand antennatracedesign,theintegration YESRefer to instruction Integral antenna with antenna gain 0dBi instructionsshallinformtheinstallerthat uniqueantennaconnectormustbe usedon the Part15 authorizedtransmittersusedin thehost product.Themodulemanufacturersshall providealistofacceptableuniqueconnectors. 2.8 Labeland complianceinformation Granteesare responsiblefor the continued complianceof theirmodulesto the FCC rules. This includesadvisinghost product manufacturersthat theyneedto providea physicalor e-lab…

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Single Modular approval Declaration letter We, apply Single modular approval for Product Name: Bluetooth module Model:DX -BT04-E FCC ID:2AKS8DX-BT04-E According to 996369 D01 Module Equip Auth Guide v01r04 and 15.212 requirement: 1)The radio elements must have the radio frequency circuitry shielded. Physical components and tuning capacitor(s) may be located external to the shield, but must beon the module assembly; Answer ：Yes，with shielded 2)The module must have buffered modulation/data inputs to ensure that the device will comply with Part 15 requirements with any type of input signal; Answer ：Yes ；All inputs to the modules are buffered through logic or microprocessor inputs. 3)The modular transmitter must have its own power supply regulation. Answer ：Yes ；A low drop out regulator is used for modular power supply regulation. 4)The module must contain a permanently attached antenna, or contain a unique antenna connector, and be marketed and operated only with specific antenna(s), per Sections 15.203, 15.204(b), 15.204(c), 15.212(a), 2.929(b); Answer ：Yes ；Device is equipped with Integral antenna. (5)The module must demonstrate compliance in a stand-alone configuration; Answer ：Yes，distance between modular and all AEs are longer than 20cm ，refer to setup photo. (6)The module must be labelled with its permanently affixed FCC ID label, or use an electronic display (See KDB Publication 784748 about labelling requirements); Answer ：Yes ；The modular has a permanent fixed label, and below statement was listed in the User Manual;The host device must be labeled to display the FCC ID of the module Contains FCC ID: 2AKS8DX-BT04-E (7)The module must comply with all specific rules applicable to the transmitter including all the conditions provided in the integration instructions by the grantee; Answer ：Yes ；The module comply with all specific rules applicable to the transmitter including all the conditions provided in the integration instructions by the grantee, Refer to test report and user manual . (8)The module must comply with RF exposure requirements Answer ：Yes ；Transmitter meets MPE calculation of 47 CFR 1.1307 . Refer to MPEReports and Refer to modular installation manual Date: 2021-03-02 Signature Name: zhou guanzhi Title: Sales Manager Company: SHEN ZHEN DX-SMART TECHNOLOGY CO.,LTD Address: Room 601, Block A1, Huafeng Zhigu, Hangkong Road, Baoan District, Shenzhen, China

Page 1 of 1 Report No.: STS2101098 APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Model: DX-BT04-E Photo 1 Photo 2

Label Bluetooth module Model name DX-BT04-E FCC ID: 2AKS8DX-BT04-E W:5mm W:10mm Note:The label is silk-screen on the sample Note: The label is silk-screen on the sample Note: The label is silk-screen on the sample L:30mm L:30mm

Page 1 of 1 Report No.: STS2101098 APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Model: DX-BT04-E Photo 1 Photo 2

FCC ID: 2AKS8DX-BT04-E RF EXPOSURE EVALUATION METHOD SAR Test Exclusion Thresholds for 100 MHz – 6 GHz and ≤ 50 mm Approximate SAR Test Exclusion Power Thresholds at Selected Frequencies and Test Separation Distances are illustrated in the following Table. 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 f(GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to the nearest mW and mm before calculation The result is rounded to one decimal place for comparison The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. FCC ID: 2AKS8DX-BT04-E Maximum measured transmitter power. BT 3.0 The Worst Case Mode 2402-2480MHz Detector PEAK GFSK -3±1dBm Remark: The worst case gain of the antenna is 0dBi. 0dBi logarithmic terms convert to numeric result is nearly 1. Mode Frequen cy (GHz) Maxinum Peak Conducted Output Power (dBm) Tune up Power (dBm) Tune up Power (mW) Result Limit GFSK 2.402 -2.08-20.631 0.196 3 BLE 4.2 The Worst Case Mode 2402-2480MHz Detector PEAK GFSK -4±1dBm Remark: The worst case gain of the antenna is 0dBi. 0dBi logarithmic terms convert to numeric result is nearly 1. Mode Frequen cy (GHz) Maxinum Peak Conducted Output Power (dBm) Tune up Power (dBm) Tune up Power (mW) Result Limit GFSK 2.402 -3.86-30.501 0.155 3 Threshold at which no SAR required is 0.196≤ 3.0 for 1-g SAR, Separation distance is 5mm.

Any reproduction of this document must be done in full. No single part of this document may be reproduced without permission from STS, all test data presented in this report is only applicable to presented test sample. Shenzhen STS Test Services Co., Ltd. A 1/F, Building B, Zhuoke Science Park, No.190 Chongqing Road, HepingShequ, Fuyong Sub-District, Bao’an District, Shenzhen, Guang Dong, China TEL: +86-755 3688 6288 FAX: +86-755 3688 6277 E-mail:[email protected] RADIO TEST REPORT Report No.:STS2101098W04 Issued for SHEN ZHEN DX-SMART TECHNOLOGY CO.,LTD Room 601, Block A1, Huafeng Zhigu, Hangkong Road, Baoan District, Shenzhen, China Product Name: Bluetooth module Brand Name: N/A Model Name: DX-BT04-E Series Model: N/A FCC ID: 2AKS8DX-BT04-E Test Standard: FCC Part 15.247 S T L A B S Page 2 of 46 Report No.: STS2101098W04 TEST RESULT CERTIFICATION Applicant’s Name ..................: SHEN ZHEN DX-SMART TECHNOLOGY CO.,LTD Address ..................................: Room 601, Block A1, Huafeng Zhigu, Hangkong Road, Baoan District, Shenzhen, China Manufacturer's Name ...........: SHEN ZHEN DX-SMART TECHNOLOGY CO.,LTD Address ..................................: Room 601, Block A1, Huafeng Zhigu, Hangkong Road, Baoan District, Shenzhen, China Product Description Product Name .........................: Bluetooth module Brand Name ..........................: N/A Model Name ...........................: DX-BT04-E Series Model ...........................: N/A Test Standards ......................: FCC Part15.247 Test Procedure .......................: ANSI C63.10-2013 This device described above has been tested by STS, the test results show that the equipment under test (EUT) is in compliance with the FCC requirements. And it is applicable only to the tested sample identified in the report. This report shall not be reproduced except in full, without the written approval of STS, this document may be altered or revised by STS, personal only, and shall be noted in the revision of the document. Date of Test ............................................ : Date of receipt of test item ...................... : 15 Jan. 2021 Date (s) of performance of tests ............. : 15 Jan. 2021 ~ 08 Mar. 2021 Date of Issue ........................................... : 08 Mar. 2021 Test Result ............................................... : Pass Testing Engineer : (Chris Chen) Technical Manager : (Sean she) Authorized Signatory : (Vita Li) Page 3 of 46 Report No.: STS2101098W04 Table of Contents 1. SUMMARY OF TEST RESULTS 6 1.1 TEST FACTORY 7 1.2 MEASUREMENT UNCERTAINTY 7 2. GENERAL INFORMATION 8 2.1 GENERAL DESCRIPTION OF THE EUT 8 2.2 DESCRIPTION OF THE TEST MODES 10 2.3 TEST SOFTWARE AND POWER LEVEL 10 2.4 BLOCK DIAGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 11 2.5 DESCRIPTION OF NECESSARY ACCESSORIES AND SUPPORT UNITS 12 2.6 EQUIPMENTS LIST 13 3. EMC EMISSION TEST 15 3.1 CONDUCTED EMISSION MEASUREMENT 15 3.2 TEST PROCEDURE 16 3.3 TEST SETUP 16 3.4 EUT OPERATING CONDITIONS 16 3.5 TEST RESULTS 17 4. RADIATED EMISSION MEASUREMENT 19 4.1 RADIATED EMISSION LIMITS 19 4.2 TEST PROCEDURE 21 4.3 TEST SETUP 22 4.4 EUT OPERATING CONDITIONS 22 4.5 FIELD STRENGTH CALCULATION 22 4.6 TEST RESULTS 24 5. CONDUCTED SPURIOUS & BAND EDGE EMISSION 31 5.1 LIMIT 31 5.2 TEST PROCEDURE 31 5.3 TEST SETUP 31 5.4 EUT OPERATION CONDITIONS 31 5.5 TEST RESULTS 32 6. POWER SPECTRAL DENSITY TEST 36 6.1 LIMIT 36 6.2 TEST PROCEDURE 36 6.3 TEST SETUP 36 Page 4 of 46 Report No.: STS2101098W04 Table of Contents 6.4 EUT OPERATION CONDITIONS 36 6.5 TEST RESULTS 37 7. BANDWIDTH TEST 39 7.1 LIMIT 39 7.2 TEST PROCEDURE 39 7.3 TEST SETUP 39 7.4 EUT OPERATION CONDITIONS 39 7.5 TEST RESULTS 40 8. PEAK OUTPUT POWER TEST 42 8.1 LIMIT 42 8.2 TEST PROCEDURE 42 8.3 TEST SETUP 43 8.4 EUT OPERATION CONDITIONS 43 8.5 TEST RESULTS 44 9. ANTENNA REQUIREMENT 45 9.1 STANDARD REQUIREMENT 45 9.2 EUT ANTENNA 45 10. EUT TEST PHOTO 46 Page 5 of 46 Report No.: STS2101098W04 Revision History Rev. Issue Date Report NO. Effect Page Contents 00 25 Jan. 2021 STS2101098W04 ALL Initial Issue Page 6 of 46 Report No.: STS2101098W04 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: KDB 558074 D01 15.247 Meas Guidance v05r02. FCC Part 15.247,Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS -- 15.247 (a)(2) 6dB Bandwidth PASS -- 15.247 (b)(3) Output Power PASS -- 15.247 (c) Radiated Spurious Emission PASS -- 15.247 (d) Conducted Spurious & Band Edge Emission PASS -- 15.247 (e) Power Spectral Density PASS -- 15.205 Restricted bands of operation PASS -- Part 15.247(d)/part 15.209(a) Band Edge Emission PASS -- 15.203 Antenna Requirement PASS -- NOTE: (1) ‘N/A’ denotes test is not applicable in this Test Report. (2) All tests are according to ANSI C63.10-2013. Page 7 of 46 Report No.: STS2101098W04 1.1 TEST FACTORY SHENZHEN STS TEST SERVICES CO., LTD Add. : A 1/F, Building B, Zhuoke Science Park, No.190 Chongqing Road, HepingShequ, Fuyong Sub-District, Bao’an District, Shenzhen, Guang Dong, China FCC test Firm Registration Number: 625569 IC test Firm Registration Number: 12108A A2LA Certificate No.: 4338.01 1.2 MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ± U, where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2, providing a level of confidence of approximately 95 %. No. Item Uncertainty 1 RF output power, conducted ±0.68dB 2 Unwanted Emissions, conducted ±2.988dB 3 All emissions, radiated 30-1GHz ±5.6dB 4 All emissions, radiated 1G-6GHz ±5.5dB 5 All emissions, radiated>6G ±5.8dB 6 Conducted Emission (9KHz-150KHz) ±3.37dB 7 Conducted Emission (150KHz-30MHz) ±3.83dB Page 8 of 46 Report No.: STS2101098W04 2. GENERAL INFORMATION 2.1 GENERAL DESCRIPTION OF THE EUT Product Name Bluetooth module Trade Name N/A Model Name DX-BT04-E Series Model N/A Model Difference N/A Product Description The EUT is a Bluetooth module Operation Frequency: 2402~2480 MHz Modulat…

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Page 1 of 2 FCC ID: 2AKS8DX-BT04-E DSS&DTS Setup photo Model name: DX-BT04-E DSS&DTS conduction DSS&DTS radiation L Page 2 of 2 FCC ID: 2AKS8DX-BT04-E DSS&DTS radiation H