0727@52RD-MTK校准过程.docx

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1、AFC的校准2005-1-2516:11:01ID=O2005-1-2516:11:03Agilent663x2okinitialize（init）2005-1-2516:11:03AgilentEquipmentEnabled-I=02005-1-2516:11:03TargetEnabled-2=02005-1-2516:11:03TargetWriteAFCvaluetoNVRAM（写入初始值，比如scorpio的是4672）2005-1-2516:11:03=Writeinitialvaluetoflashend=2005-1-2516:11:03=AFCcalibrationbegi

2、n=2005-1-2516:11:03Agilent8960Band=EGSMband（设置仪器）2005-1-2516:11:03Agilent8960BCHARFCN=702005-1-2516:11:03Agilent8960cellpower=-602005-1-2516:11:03TargetEnabled2=02005-1-2516:11:04TimerCal-Enabled3=026MHzVC-TCXO的AFC校准过程1）依据上面写入的初始值DACl=4672,测量手机的频率fl；2）在DACl的上面加上肯定的步长得到DAC2,测量手机频率Note：Slope=3）计算斜率SIo

3、Pe,公式如下whereDAC1andDAC2areAFCDACvalue,andMandNf、areaveragedfrequencyerrormeasuredattargetside.依据Slope算出26M对应的DAC值，校准结束。2005-1-2516:11:04=AFCcalibrationend=2005-1-2516:11:04=AFCcalibrationcheckbegin=对依据SSpe得到的值进行测试,此例得到的是DAC值是4395,Sk）Pe是2.77399,下面将对这两个结果检测看是否在目标范围之内，包括4000DAC5000,lSlope4,Fedefaultval

4、ue=43952005-1-2516:11:04Targetslopeinv=14762005-1-2516:11:04TimerCal-Enabled4=02005-1-2516:11:04TargetWriteAFCvaluetoNVRAM2005-1-2516:11:04TargetWriteAFCvaluetoNVRAM2005-1-2516:11:04=AFCcalibrationcheckend=2005-1-2516:11:04TargetSetAFCDAC=43952005-1-2516:11:04=Pathlosscalibrationbegin=接收信道补偿的校准2005-

5、1-2516:11:04Agilent8960band=EGSM2005-1-2516:11:05Agilent8960BCHARFCN=152005-1-2516:11:05Agilent8960Power=-602005-1-2516:11:05TargetEnabled1=02005-1-2516:11:05Targetpower=-4862005-1-2516:11:05delta1.=62005-1-2516:11:05Agilent8960BCHARFCN=302005-1-2516:11:05Agilent8960Power=-602005-1-2516:11:05TargetE

6、nabledI=O2005-1-2516:11:05Targetpower=-4882005-1-2516:11:05delta1.=82005-1-2516:11:05Agilent8960BCHARFCN=452005-1-2516:11:05Agilent8960Power=-602005-1-2516:11:05TargetEnabledI=O2005-1-2516:11:05Targetpower=-490ADC的校准1）依据原理图，对于ADC的校准主要利用了ADCo和ADC3这两个模数转换通道（分别对应电池VBAT和Charge端，其余两个通道的值校准后干脆用ADCO的校准参数，不

7、单独做校准。2）校准的过程：先限制电源供电电压分别为3.4V和4.2V,则可以得到两个对应的ADC值,依据这两组值分别计算出ADCO和ADC3的slop和offset值，知道了slop值和offset值，就可以得到每个输入电压的值。3）准后的检测：主要检测SIOP和OffSet值是否超出范围，还有ADCCUIrentlimitcheck和ADCVOItageIimitCheCk两项功能，分别检测通过电阻RESlSTANCE的电流，还有在ADCO和ADC3之处得到的电压差。4）通过检测后就可以把校准参数写到手机里了。2005-1-2516:18:36=ADCcalibrationbegin=20

8、05-1-2516:18:36setAgilent663x2setvlotage=3.42005-1-2516:18:36setAgilent663x2measurevlotage=3.411222005-1-2516:18:36BATTERY_ADCJDUtPUt=625.9489746093752005-1-2516:18:36CHARGER_ADC_Output0=624.6790161132812005-1-2516:18:36setAgilent663x2setvlotage=4.22005-1-2516:18:36setAgilent663x2measurevlotage=4.21

9、3722005-1-2516:18:36BATTERY_ADC_Outputl=7743610229492192005-1-2516:18:36CHARGER_ADC_Output1=772.7050170898442005-1-2516:18:36BATTERY_ADC_Slope=54072005-1-2516:18:36BATTERY_ADC_Offset=265622005-1-2516:18:36CHARGER_ADC_Slope=54212005-1-2516:18:36CHARGER_ADC_Offset=246202005-1-2516:18:36StartwrittingAD

10、Cslopeandoffsettoflash2005-1-2516:18:37TargeKWriteADCslopeandoffsettoflashok2005-1-2516:18:37=ADCcalibrationend=2005-1-2516:18:37=ADCcurrentlimitcheckbegin=2005-1-2516:18:37BATTERY_ADC_Outputl2=774.3060302734382005-1-2516:18:37CHARGER_ADC_Output2=772.7089843752005-1-2516:18:37=ADCcurrentlimitchecken

11、d=2005-1-2516:18:37=ADCvoltagelimitcheckbegin=2005-1-2516:18:37setAgilent663x2setvlotage=3.62005-1-2516:18:37setAgilent663x2measurevlotage=3.611382005-1-2516:18:37BATTERY_ADC_Output2=662.252005-1-2516:18:37BATTERY_ADC_Predict_Vbltage=3.60734772682192005-1-2516:18:37CHARGER_ADC_Output2=660.8599853515

12、632005-1-2516:18:37Pass:ADCcalibrationcheckbatterychannelvlotagedifference=0.004032373428344732005-1-2516:18:37Pass:ADCcalibrationcheckslopeandoffset.BATTERYADCslope=5407minbatteryADCslope=5250maxbatteryADCslope=55502005-1-2516:18:37=AEX2voltagelimitcheckend=2005-1-2516:18:39setAgilent663x2setvlotag

13、e=3.8手动校准ADC1）先校准ADCO通道,先在Pointl输入3400,并把电源电压设置成3.4V,按下START,可以看到软件将计算出ADC值641.7；然后在Point2输入4200,设置电源并按下START；将看到软件计算出的S1.oP和OFFSET结果,然后再按APP1.Y把这两个参数写到ADCo去,其他ADCl和ADC2用的值跟ADCO一样，不再单独校准。2）再校准ADC3,方法同ADCO一样，最终把参数写到手机。Thefollowingisatemplateformatofconfigurationfile.8960Initialization8960GPIBAddress=

14、GPIB0:15:INSTRTimeOut=5000GSM400cableloss=-1.0GSM850cableloss=-1.0GSM900cableloss=-1.0DCS1800cableloss=-1.5PCS1900cableloss=-1.5；8960GPIBAddressisGPIBaddressOfAgiIent8960.f,GSM900cablelossiscablelossbetweenAgilent8960andMSatGSM900bank.FrequencyBank/specifythebandsupportedbyMSbank=0x1C；GSM4500x01;GSM

15、8500x02;GSM9000x04;DCS18000x08;PCS19000x10;ThemeaningofuOx1C,isthatMETAwilldoGSM900,DCS1800andPCS1900bankautocalibration.COforeachBank/specifytheTXleveltestingARFCNforeachbankarfcn_CO_GSM=60arfcn_CO_DCS=750arfcn_CO_PCS=660!ChannelnumberforGSM,DCSandPCSbank.Downlinkpower/specifythedownlinkcellpowerus

16、edintestingP_D1.=-60RXmeasurementsamples/specifytheparameterforPMtestingN_PM=5M_PM=4;refertosection3.2.1forthelimitationN_PM*M_PM=2000;N_PMistestingframesnumberofRX;M_PMissamplesperframe.Maxvalueis4.RXpathlosstableGSM900_MAX_RX_1.OSS=5.000,5.000,5.000,5.000,5.000,5.000,5.000,5.000,5.000,5.000,5.000,

17、5.0000,GSM900_MIN_RX_1.OSS=-5.000,-5.000,-5.000,-5.000,-5.000,-5.000,-5.000,-5.000,-5.000,-5.000,-5.000,-5.0000,;GSM900_MAX_RX_1.OSSisthemaximumlimitationofGSM900RXpathloss;GSM900_MIN_RX_1.OSSistheminimumlimitationofGSM900RXpathlossDCS1800_MAX_RX_1.OSS=5.000,5.000,5.000,5.000,5.000,5.000,5.000,5.000

18、,5.000,5.000,5.000,5.0000,DCS1800_MIN_RX_1.OSS=-5.000,-5.000,-5.000,-5.000,-5.000,-5.000,-5.000,-5.000,-5.000,-5.000,-5.000,-5.0000,;DCS1800_MAX_RX_1.OSSisthemaximumlimitationofDCS1800RXpathloss;DCS1800_MIN_RX_1.OSSistheminimumlimitationofDCS1800RXpathlossPCS1900_MAX_RX_1.OSS=5.000,5.000,5.000,5.000

19、,5.000,5.000,5.000,5.000,5.000,5.000,5.000,5.0000,PCS1900_MIN_RX_1.OSS=-5.000,-5.000,-5.000,-5.000,-5.000,-5.000,-5.000,-5.000,-5.000,-5.000,-5.000,-5.0000,;PCS1900_MAX_RX_1.OSSisthemaximumlimitationofPCS1900RXpathloss;PCS1900_MIN_RX_1.OSSistheminimumlimitationofPCS1900RXpathlossAFCCalibration/speci

20、fytheAFCtestingparamterN_AFC=5DAC1=4000DAC2=4500;N_AFCistestingframesnumberofAFCAFCtableMAX_INIT_AFC_DAC=65535MIN_INIT_AFC_DAC=0MAX_AFC_S1.OPE=5.000MIN_AFC_S1.OPE=0.000;MAX_INIT_AFC_DACisthemaximumlimitationofinitialAFCDACvalue;MIN_INIT_AFC_DACistheminimumlimitationofinitialAFCDACvalue;MAX_AFC_S1.OP

21、EisthemaximumlimitationofAFCslope;MIN_AFC_S1.OPEistheminimumlimitationofAFCslopeTXPC1.table/specifyTXlevelspecificationGSM900_CA1._PC1.=17,12,5,;CalibratedPC1.of3pointPC1.calibrationGSM900_PC1.=19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,;CalibratedPC1.offullPC1.calibrationGSM900_CHECK_PC1.=19,18,17,16,

22、15,14,13,12,11,10,9,8,7,6,5,;SpecifythePC1.needtobecheckwhendoAPCcalibrationcheckGSM900_MAX_P=5.5,7.5,9.5,11.5,13.5,15.5,17.5,19.5,21.5,23.5,25.5,27.5,29.5,31.5,32.8,;MAXpowerlevelGSM900_WANTED_P=5.0,7.0,9.0,11.0,13.0,15.0,17.0,19.0,21.0,23.0,25.0,26.7,28.7,30.2,32.2,;IdeapowerlevelforeachPC1.GSM900

23、_MIN_P=5,7,9,11,13,15,17,19,21,23,25,26.5,28.5,30,31.5,;MinpowerlevelGSM900_C=10,10,10,10,10,10,10,10,10,10,10t10,10,10,10,;AweightedvalueisusedforTXpowerlevelcalibration.Pleaserefertosection4.2.4.GSM900_CORRECTION=0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,;Correctionusingwhendoing3PC1.calibrationDCS1800_CA1._P

24、C1.=13,8,1,DCS1800_PC1.=15,14,13,12,11,10,9,8,7,6,5,4,3,2,1Q,DCS1800_CHECK_PC1.=15,14,13,12,11,10,9,8,716,5,4,3,2,1,0,DCS1800_MAX_P=1,2.5,4.5,6.5,8.5,10.5,12.5,14.5,16.5,18.5,20.5,22.5,24.5,26.5,28.5,29.8,DCS1800_WANTED_P=0.5,2.5,4.5,6.5,8.5,10.0,12,14,16,18,20,22,24,25.5,27.5,29.2,DCS1800_MIN_P=0,2

25、,4,6,8,10,12,14,16,18,20,22,24,25,27,28,DCS1800C=10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,DCS1800_CORRECTION=0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,PCS1900_CA1._PC1.=13,8,11PCS1900_PC1.=15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,PCS1900_CHECK_PC1.=15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,PCS1900_MAX_P=0.5,2

26、.5,4.5,6.5,85,10.5,12.5,14.5,16.5,18.5,20.5,22.5,24.5,26.5,28.5,30.5,PCS1900_WANTED_P=0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,PCS1900_MIN_P=-0.5,1.5,3.5,5.5,7.5,9.5,11.5,13.5,15.5,17.5,19.5,21.5,23.5,25.5,27.5,29.5,PCS1900_C=1,2,2,3,4,57,9,10,13,13,13,14,14,15,20,PCS1900_CORRECTION=0,0,0,0,0,0,0,

27、0,0,0,0,0,0,0,0,0,TSC=5RecursiveTimes=5;themaximumtimestocalibrateonepowerlevelAPCDelta=0.1;ifpowerlevelisintherangeof(wantedpowerlevel-APCdelta,wantedpowerlevel+APCdelta),jumptocalibratenextpowerlevel;TSCisthecellTSCvalueinAgilent8960;WANTED_PiswantedpowerindBmforcorrespondingPC1.;MAX_PisMAXlimitat

28、ionpowerindBmforcorrespondingPC1.;MIN_PisMINlimitationpowerindBmforcorrespondingPC1.;CisaweightedvalueusedforTXpowerlevelcalibration.Pleaserefertosection4.2.4.;MAX_P,WANTED_P,MIN_PandCcanbeintegerorfloatingpoint.ADCtableADC_V1=3400ADC_V2=4200ADC_CHECK_VO1.TAGE=3600NORMA1._VO1.TAGE=3800MAX_BATTERY_AD

29、C_S1.OPE=5300.0MIN_BATTERY_ADC_S1.OPE=5100.0MAX_BATTERY_ADC_OFFSET=100000000MIN_BATTERY_ADC_OFFSET=0BATTERY_CHANNE1.=0CHARGER_CHANNE1.=3ADC_RESISTANCE=0.33MAX_VO1.TAGE_DIFFERENCE=0.04MAX_CURRENT_DIFFERENCE=0.02ADC_MEASUREMENT_COUNT=1000;ADC_V1isthevoltageofADCcalibrationpoint1,unit=mV;ADC_V2isthevol

30、tageofADCcalibrationpoint2,unit=mV;ADC_CHECK_VO1.TAGEisthevoltageofADCcalibrationvoltagecheck,unit=mV;NORMA1._VO1.TAGEisthevoltageofpowersupplyaftercalibrationfinish,unit=mV;MAX_BATTERY_ADC_S1.OPEisthemaximumlimitationofbatteryADCslope;MIN_BATTERY_ADC_S1.OPEistheminimumlimitationofbatteryADCslope;MA

31、X_BATTERY_ADC_OFFSETisthemaximumlimitationofbatteryADCoffset;MIN_BATTERY_ADC_OFFSETistheminimumlimitationofbatteryADCoffset;BATTERY_CHANNE1.isthefirstchanneltodoADCcalibration;CHARGER_CHANNE1.isthesecondchanneltodoADCcalibration;ADC_RESISTANCEistheresistancewhendoADCcurrentlimitationcheck;MAX_VO1.TA

32、GE_DIFFERENCEisthemaximumvoltagedifferencebetweenvoltageofpowersupplyandestimatedvoltage,unit=V;MAX_CURRENT_DIFFERENCEisthemaximumcurrentdifference,unit=A;ADC_MEASUREMENT_COUNTistheADCmeasurementcount并不是测量AFC,只是设AFC为低值时（AFj1.oW）,让手机强制放射，综测仪读取频率误差，然后再把AFC为高值时（AFCJiigh）,读频率误差，然后依据两点求直线来，算出AFC的斜率，AFC再调

33、整频率误差时以这条直线为基准来调整。AFC一般线性特别好。当AFJ1.oW是在什么状况下的?感念不是很清晰.当时的频率误差是以那个频率为基准测得的？但我看到MTK校准时,好多信道都要测试DAC,DAC与AFC是有干脆关系的吧.这个数摸转换值是这么读出来的？要看AFC寄存器是几位的，假定是12位，AFe值最大就是2八12=4096。一般在正常状况下，AFC取中间值即2047时对应的频率误差最小，当AFC在2047的基础上变大或变小时，频率误差也随之变大。我们用直线来模拟AFC曲线时，一般去中间线性度最好的一段，即2047为中点的，两边各取等距的两点来计算。DAC值不须要我们读出来，我要知道的只是

34、AFC值和和频率误差，算出斜率即可。AFC主要是为了保证Target的时钟频率和网络正确同步。我们知道DAC（数模转换器）和FrequencyOffSet（时钟频率偏移）有近似线性的关系，DAC-FreqUenCyOffeet曲线由两个要素确定，一个是基准值（nominalvalue）,一个是曲线的斜率（SIoPe）。所谓的基准值指的就是当FrequencyOffset值为零时DAC的值，假如还知道Slope的值，就可以依据任何一个FreqUenCyOffSet计算出对应的DAC值了。DAC的值域和所用的芯片有关，TTPCom供应的Module的DAC是用一个13位的寄存器实现的，所以DAC的

35、最小值为0,最大值为8191（213-1）。其实校准的原理并不困难,校准方案也是大同小异.比如用CMU200进行校准RX,是用非信令模式的generator放射一个射频信号（不同的方案可能会要求有一个小的频偏）,该信号经过1.NA放大,下变频,DGAIN或者AGAlN放大送入基带芯片进行解调.须要驾驭一个原则,就是一般要求解调信号电平为一个定值来达到最佳解调,校准的时候也要遵循这个原则.设置1.naqgaimagain的增益状态,调整CMU200的输出信号,当解调电平达到志向值的时候,就完成了一个等式:generato电平已知,解调电平已知,适当的设置上面的可调增益,就可以得到一组数据,也就是校准数据,这些数据记录了接收通路的状况,当接收通路设置不同的时候,这些数据就可以拿来当作参考,使限制器知道应当如何操作来达到最佳的信号接受.NVRAMDatabasefile:选择NVRAM数据库文件Configfilelocation:校准配置文件CalibrationfileIoCation:校准参数文件Testsetupfilelocation:测试建立设置文件TestreportIOCatiOn:测试报告测试结果文件存放位置ReportdatabaseIOCatiOn:测试报告数据库文件位置