CTA音频测试资料

,*,按一下以編輯母片標題樣式,按一下以編輯母片,第二層,第三層,第四層,第五層,ACQUA Acoustic Testfor CTA,MTK WCP_,wang,xuecheng,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,TYPE1,Spec,介绍,测试项目,:,Sending frequency response,发送频响,(,SFR),Sending loudness rating,发送响度,(,SLR),Receiving frequency response,接收频响,(,RFR),Receiving loudness rating,一般接收响度,(,RLR) nom,Receiving loudness rating,最大接收响度,(,RLR) max,Receiving loudness rating,最小接收响度,(RLR) min,Side tone masking rating,侧音屏蔽度,(,STMR),Sending distortion,发送失真,Spec,标准,Handset,Desktop and Vehicle-mounted hands-free,Handheld hands-free,Headset,SLR,8 +/- 3 dB,13 +/- 4 dB,13 +/- 4 dB,8 +/- 3 dB,RLR,nominal,2 +/- 3 dB,2 +/- 4 dB,6 +12/- 4 dB,2 +/- 3 dB,maximum, -13 dB, 15 + nominal,X, -13 dB,minimum, 46 dB, 40 dB, 40 dB, 46 dB,Handset mode,Loudspeaker mode,Headset mode,We only need,To Test Handset,mode,设备介绍,(Use CMU200),MFE VI,HLC,HMA IV,Acoustic Chamber,Artificial Mouth,Artificial Ear,CMU200,A,coustic,chamber,Artificial Ear,Artificial Mouth,LRGPTest Head,Notice the type in report,Instrument Description:,CMU200:,Radio communication tester.,无线通信测试仪,MFE VI:,Measurement,frontend,.,MFE IV forms the connecting link between data acquisition via the artificial mouth/ear and digital speech quality analysis with ACQUA.,测量前端,MFE IV,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,HMA IV:,HEAD Mouth Amplifier. It is used as an extension of MFE VI to control the artificial mouth.,用于扩展,MFE VI,来,控制仿真嘴,HLC I:,(CMD55 use only) HLC I is a bi-directional stereo interface for matching the input and output levels of the unbalanced connectors of the HEAD acoustics measurement,frontend,MFE VI and the radio communication tasters CMD55 or CMU200.,HLC I,是一个双向,立体声接口用于,匹配测量前端,MFE IV,和,无线通信测试仪,的不平衡连接的,输入和,输出层。,ACQUA Acoustic Test _Using CMU200,Power on Step:,1.Open the power of CMU200 ,MFE and HMA ,2. Check the lock is connected,3.Open software HEAD ACQUA,4. Check the MFE setting,Using GSM11R10,Basic 7 test items in ACQUA(1/2),SFR,RFR,RFR ,SFR using ETSI GSM 11.10.p50 signals,RLR nom vol.,Sending distortion,RLR max vol.,STMR,SLR,现在我们这边,ACQUA,软件里面没有,RLR min,vol,这项,Basic 8 test items in ACQUA(2/2),3,、具体测试方法,-,META,(,Version,5.6),Fine,t,uning,in META,Tuning Items,：,Sending frequency response (SFR),Receiving frequency response (RFR),Sending loudness rating (SLR),Receiving loudness rating (RLR),Side tone masking rating (STMR),SFR is easy to pass if setting the,“Handset input,coeff,.” to all pass(32767),SLRRLRSTMR can tune in,phone engineer mode,(*#3646633#),Audionormal,Microphone-SLR,Speech-RLR,Side Tone-STMR,RFR is the main,tuning item in,META tool.,RFR tuning flow block,If the RFR cant pass,Set “Handset output,coeff,.”,to all pass (32767),Using this all pass phone,run RFR to get a all pass,Result. Save the result to,.,xls,file.,Change .,xls,file to .txt file,Load the .txt file to META,and tuning the RFR curve,Save the result to .,ini,file,and down to flash,Run RFR testing item,And pass,Load All-Pass Parameters to NVRAM,2,. Upload the parameter from flash.,3,. Load All Pass Parameters.,4,. Download the All,PassParameters,to Flash.,1.Change database,Load All-Pass Parameters to NVRAM,修改后第一个值为,32767,，后面全部为,0,，如上图所示,Load All-Pass Parameters to NVRAM,修改好参数后，关闭界面，注意，拔掉手机是一定要先用鼠标点击上面红色地方（,Reconnect,）让左边黄色圈圈变红，才能拔掉手机，如下图,ACQUA,测试,1.,选择测试结果,2.,选择,file type,3.,保存结果,4.,不存成功后显示保存的位置,SFR test result,1,2,3,4,ACQUA,测试,删除上面多于的部分,(,红色标注部分）,ACQUA,测试,把第一列修改为整数,ACQUA,测试,Svae,as “txt ”,文档,FIR Tuning,重新连接,meta,进入,audio,里面，点击红色部分进行调试,FIR Tuning,2. Load input file and setup output file path.,3. Click “Idealize”, and “Run”,1. Set tuning parameters,FIR Tuning,Change the value to 1 will increase the sound volume,If not satisfied, you can adjust the Idealize curve on graph directly, or change the value on the right side.,After FIR tuning ,we get .INI file,Load the Parameter to NVRAM,1. Load the parameter from FIR tuning result,(the .,ini,file),2. Download the parameters to flash,RFR tuning is over,Volume Setting Microphone,Microphone setting will affect SLR,16 per step, and increase 1 step will decrease SLR 3dB,Volume Setting Speech Tone,Speech Tone setting will affect RLR,16 per step, and increase 1 step will decrease RLR 2dB,Volume Setting,SideTone,SideTone,setting will affect STMR,16 per step, and increase 1 step will decrease STMR 2dB,For example,If the SLR is 14dB, test item will fail because the spec. is 8+/-3dB.,We,decrease,6dB to let SLR down to 8dB, so there are 2steps and we will,increase,32 at the Microphone.,The rode is:,engineer mode(*#3646633#)AudionormalMicrophone,Elements,:,Microphone setting will affect SLR,16 per step, and increase 1 step will decrease SLR 3dB,SLRRLRSTMR can tune in,phone engineer mode,(*#3646633#),Audionormal,Microphone-SLR,Speech-RLR,Side Tone-STMR,Create .INI file used for loading to another phone,Create .c file used for SW,Create .INI file used for loading to another phone,Create .c file used for SW,经验分享,1.,测试项目调试顺序,CTA,测试一共有,7,个测试项目：,两个频响：,SFR/RFR,四个声音度大小：,SLR/RLR,（,normalmax vol.,）,/STMR,一个发送失真,:sending distortion,较理想的调试顺序：,第一步：两个频率响应（,RFR/SFR,）,经验：,SFR,在设置,sending FIR,为全通（,32767,）即容易通过。如果需要调整,调试方法跟,RFR,相似,将模式选,TX,即可,调试,SFR,请将,FIR scale,设置成,1.,RFR,需要在,META,中调整 （这是整个测试中最花精力的地方）。,第二步：调整,SLR/RLR,第三步：,STMR,在,SLR,确定后调整。,第四步：查看,sending distortion.,经验：,SD,fail,可以通过将,SFR 1KHz,的频响往上拉的方式提高在,1KHz,的感度，从而通过。,原因：,SFR,改变会造成,SLR/STMR,改变,RFR,改变会造成,RLR,改变,原因：,SFR,改变会造成,SLR/STMR,改变,RFR,改变会造成,RLR,改变,原因：,STMR,会随,SLR,改变而改变,经验分享,从,ACQUA,导出,EXCEL,文件时,假如,ACQUA,设定中勾上,convert to dB,，,META,中选择,Log dB,假如,ACQUA,设定中未勾上,convert to dB,，,META,中选择,Linear,ACQUA default,是没有打勾，所以,META,设定为,Linear,2.,软件设定影响（,ACQUA/META,）,33,全通,RFR,曲线,(,音量的影响,),由于此时,receiving FIR,为,allpass(32767),，,receiver,声音此时最大。,所以音量不能过大，建议在,normal,（,speech=80,）音量等级量测。,（因手机不同改变）,高频的部分在,META,中正常，,但实际测试曲线会掉下来很多。,在,META,上拉，实际曲线也很难拉平,正确的情况,错误的情况：会出现的症状,全通,RFR,曲线,(TXT,不能导入,META,的情况,),4K,以下不管,改成,0.1420 OK,！,100,4K,TXT,文档中的频率从,12,到,23664Hz,但实际有效的频率从,100,到,4K,。,出现不能导入,META,的情况，,原因是,100,到,4K,频率的采样值出现,0.0XXX,的情况,。,改善方法是：,将,0.0xxx,改为,0.1xxx (,只需要修改,100,到,4K,中间的值,),全通,RFR,曲线,(,调整曲线时音量的控制,),选,0.5,时，意味着进,FIR,声音砍掉一半，,这样调整的时候不容易造成数据饱和,的情况，,CTA,手机建议使用,0.5,选,1,时，意味着进,FIR,声音不做调整，,这样,receiver,的声音较大，适合生产。,差异,META,误操作,（导致,sending,没有声音）,调整中错误操作造成,sending,（,Mic,）没有声音,，原因如下，以后请注意正确操作。,在移除,META,时，没有点击,Reconnect,，在黄色指示灯时就直接拔线，造成部分寄存器清,0,，导致没有声音。,请在以后操作中先点击,Reconnect,，在红色指示灯时拔线。,被修改的寄存器如下所示，改回,32767,恢复正常。,MISC.,1,）,SLR,随手机离人工嘴的位置改变而改变,2,） 直板手机注意,echo performance,，防止在北京,CTA,测试中产生啸叫影响测试。（注意北京实验室的,Acoustic chamber,隔音状况不佳）,3,）,过,CTA,标准手机和生产手机在音频参数上应该有所不同：,1,、,RFR,曲线：,CTA,曲线声音尖锐，并不适合生产，一般会调成,M,形,（根据具体手机而定）,2,、,STMR,：,CTA,标准,side tone(13dB),太大，生产会降低到,18/20dB,左右,3,、,SLR,：,CTA,标准,mic,音量比较大声，生产可以适当下调。,（减小,echo/ground noise,）,4,、,RLR,：,CTA,标准偏小，生产时适当增加,4,）,META,版本必须为,v3.7,或者更高版本,5) ,Thats all.Thank you!,