最新CTA音频测试资料教学讲义PPT课件.ppt

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1、CTA音频测试资料Outline：1.准备材料2.Spec介绍3.仪器设备介绍4.测试方法5.测试经验分享准备资料准备资料1.音频测试采用连接方式有两个选择RF和DAI，我们现在CTA测试时用的是RF方式连接2.耳承(音频)有三个选择TYPE1、TYPE3.2，我们现在过CTA都用的是TYPE1AcousticchamberArtificialEarArtificialMouthLRGP—TestHeadNoticethetypeinreportInstrumentDescription:CMU200:Radiocomm

2、unicationtester.无线通信测试仪MFEVI:Measurementfrontend.MFEIVformstheconnectinglinkbetweendataacquisitionviatheartificialmouth/earanddigitalspeechqualityanalysiswithACQUA.测量前端MFEIV形成通过仿真嘴和仿真耳采集数据及用ACQUA进行数字语音质量分析的联结HMAIV:HEADMouthAmplifier.ItisusedasanextensionofMFEVIto

3、controltheartificialmouth.用于扩展MFEVI来控制仿真嘴HLCI:(CMD55useonly)HLCIisabi-directionalstereointerfaceformatchingtheinputandoutputlevelsoftheunbalancedconnectorsoftheHEADacousticsmeasurementfrontendMFEVIandtheradiocommunicationtastersCMD55orCMU200.HLCI是一个双向立体声接口用于匹配测量前

4、端MFEIV和无线通信测试仪的不平衡连接的输入和输出层。ACQUAAcousticTest_UsingCMU200PoweronStep:1.OpenthepowerofCMU200,MFEⅥandHMAⅣ2.Checkthelockisconnected3.OpensoftwareHEADACQUA4.ChecktheMFEsettingUsingGSM11R10Basic7testitemsinACQUA(1/2)SFRRFRRFR,SFRusingETSIGSM11.10.p50signalsRLRnomvol.S

5、endingdistortionRLRmaxvol.STMRSLR现在我们这边ACQUA软件里面没有RLRminvol这项Basic8testitemsinACQUA(2/2)3、具体测试方法---META(Version5.6)FinetuninginMETATuningItems：Sendingfrequencyresponse(SFR)Receivingfrequencyresponse(RFR)Sendingloudnessrating(SLR)Receivingloudnessrating(RLR)Sideto

6、nemaskingrating(STMR)SFRiseasytopassifsettingthe“Handsetinputcoeff.”toallpass(32767)SLRRLRSTMRcantuneinphoneengineermode(*#3646633#)AudioormalMicrophone----SLRSpeech----------RLRSideTone-------STMRRFRisthemaintuningiteminMETAtool.RFRtuningflowblockIftheRFRc

7、an’tpassSet“Handsetoutputcoeff.”toallpass(32767)UsingthisallpassphonerunRFRtogetaallpassResult.Savetheresultto.xlsfile.Change.xlsfileto.txtfileLoadthe.txtfiletoMETAandtuningtheRFRcurveSavetheresultto.inifileanddowntoflashRunRFRtestingitemAndpassLoadAll-PassParame

8、terstoNVRAM2.Uploadtheparameterfromflash.3.LoadAllPassParameters.4.DownloadtheAllPassParameterstoFlash.1.ChangedatabaseLoadAll-PassParameterstoNVRAM修改后第一个值为327