《MTKSolutionRFCalibration.ppt》由会员分享，可在线阅读，更多相关《MTKSolutionRFCalibration.ppt（26页珍藏版）》请在三一文库上搜索。
1、MTK Platform RF Calibration,Prepared by Digital Person BU / ATS / Tomy Chen Aug. 19, 2008,Confidential,Page 2,Outline,Overall Calibration Process Enter Meta Mode ADC Calibration AFC Calibration AGC Calibration APC Calibration,Confidential,Page 3,Overall Calibration Process,Confidential,Page 4,Enter
2、Meta Mode,Meta Mode MTK Test Mode What user can do in Meta Mode? Flash Firmware Write parameters to DUT ISN BT & Wifi Mac IMEI Calibration Data Baseband parameters Execute RF and baseband calibration. Execute RF non-signaling test,Confidential,Page 5,Enter Meta Mode,What should we done of enter meta
3、 mode in RF calibration process? Read APC profile stored in INI setting file Connect with DUT Get firmware version from DUT Initialize NVRAM Database Write APC profile to DUT Write & read ISN to DUT Read ISN from DUT,Confidential,Page 6,Enter Meta Mode,Confidential,Page 7,ADC Calibration,ADC Calibra
4、tion in MTK Platform Measure & Calculate ADC value in battery channel Measure & Calculate ADC value in charge channel Battery Channel To ensure DUT presented battery volume correctly Charge Channel To ensure DUT presented charger volume correctly Power supply voltage setting Low voltage 3.6V High vo
5、ltage 4.2V,Confidential,Page 8,ADC Calibration,Confidential,Page 9,AFC Calibration,AFC type TCVCXO Only AFC calibration Crystal AFC coarse tune (AFC CapID) & AFC calibration Calibration type TX path DUT burst a signal and measure frequency offset from RF instrument. RX path RF instrument burst a sig
6、nal and DUT measure frequency offset. AFC functions in MTK platform. AFC coarse tune TX path AFC calibration RX path,Confidential,Page 10,AFC Calibration,Test environment setting Coarse Tune RF instrument Operation Mode Test Mode Mode Type BCH + TCH TSC 5 BCH Band EGSM or DCS TCH Band EGSM or DCS (M
7、ust meet BCH Band) Measurement Item PFER (Frequency Error) DUT DUT Mode Meta Mode Parameter Crystal Cap ID Function RF_NB_TX Crystal Cap ID will NOT be activated until written to NVRAM,Confidential,Page 11,AFC Calibration,Test environment setting Fine Tune RF instrument Operation Mode Test Mode Mode
8、 Type BCH BCH Band EGSM or DCS DUT DUT Mode Meta Mode Parameter AFC DAC Function GetAFSlopeAndOffset AFC DAC will be activated after set AFC DAC Arfcn must be the same as the BCH arfcn set to RF instrument,Confidential,Page 12,AFC Calibration,Confidential,Page 13,AFC Calibration,Confidential,Page 14
9、,AGC Calibration,AGC feature in MTK platform Different BS power using the same gain. We need to measure and calculate gain offset in different arfcn Its not necessary to execute AGC calibration in EPSK mode. Test environment setting RF instrument Operation Mode Test Mode Mode Type BCH BCH Band All D
10、UT active band,Confidential,Page 15,AGC Calibration,DUT DUT Mode Meta Mode Parameter AGC Gain Offset in different arfcn Function Power Measure Arfcn must be the same as the BCH arfcn set to RF instrument Gain value when BS power under -108dB Gain = -35 (BS Power),Confidential,Page 16,AGC Calibration
11、,Confidential,Page 17,APC Pedestal Calibration,APC Pedestal Calibration Execution Condition For Skyworks BiCMOS iPAC Purpose For smoothing the power ramp up & ramp down Shorter time request of ramp up and ramp down,Confidential,Page 18,APC Pedestal Calibration,Test environment setting Fine Tune RF i
12、nstrument Operation Mode Test Mode Mode Type BCH + TCH BCH Band All DUT active band TCH Band All DUT active band (Must be the same as BCH Band) Power Control Manual Measurement item Transmitter Power,Confidential,Page 19,APC Pedestal Calibration,DUT DUT Mode Meta Mode Parameter APC dc offset & Low A
13、PC dc offset Function RF_ApcSetLevelDac & RF_NB_TX Pedestal High & Low target power should be defined by RF team. Arfcn must be the same as the BCH arfcn set to RF instrument,Confidential,Page 20,APC Pedestal Calibration,Confidential,Page 21,APC Calibration,Calibration scope Center channel calibrati
14、on Adjust PCL high to low in the center arfcn Channel compensation Adjust and calculate channel weight to balance power difference in different arfcn Difference between GMSK mode and 8PSK mode In GMSK mode, APC DAC will activated after set APC DAC to DUT. In 8PSK mode, APC DAC will activated after w
15、rite DAC to NVRAM. Other? Need to be found In 8PSK mode, DAC estimation according to the GMSK power is suitable? Need to be verified,Confidential,Page 22,APC Calibration,Test environment setting APC Center channel RF instrument Operation Mode Test Mode Mode Type BCH + TCH BCH Band All DUT active ban
16、d TCH Band All DUT active band (Must be the same as BCH Band) Power Control Manual Measurement item Transmitter Power PCL Switch from High to Low DUT DUT Mode Meta Mode Parameter APC DAC Function RF_ApcSetLevelDac & RF_NB_TX Target power defined by RF or ETSI Arfcn must be the same as the BCH arfcn
17、set to RF instrument,Confidential,Page 23,APC Calibration,Test environment setting APC Channel compensation RF instrument Operation Mode Test Mode Mode Type BCH + TCH BCH Band All DUT active band TCH Band All DUT active band (Must be the same as BCH Band) Power Control Manual Measurement item Transm
18、itter Power TCH Channel Switch according INI defined DUT DUT Mode Meta Mode Parameter APC High & Low weight Function RF_ApcSetLevelDac & RF_NB_TX Target power is the same as APC center channel Arfcn must be the same as the BCH arfcn set to RF instrument,Confidential,Page 24,APC Calibration Center Channel,Confidential,Page 25,APC Calibration Channel Balance,Confidential,Page 26,Thank You.,