有线数字电视技术及系统3

----UTIUTI“1”“2008”UTI20022003CA34UTITCLUTIHI2011UTI5oonnnonnnQAMSDRAMFlashSTB02500RS232EEPROMAudioDAC27MVCXOI2CBCM3402BCM3418BCM3402BCM3418DDRSDRAMFlash27MVCXOBCM7112VideoAmpRS232EEPROMI2C••32//16/22.05/24/32/44.1/48KHzMPEG-1Layer12115Mbps720576IPAL720480INTSCMPEG-2MP@ML36.9MS/sQAM163264128256DVB-CEN300429GY/T170-2001753880dBuV64QAM51862MHz4RCA2L/R64KbEEPROMDB-9Female115200bpsRS2323RCAY/Pb/Pr1S-VideoY/C1RCA75OUT-IEC169-1FemaleIN-IEC169-1Male32MBSDRAM4MBIBMSTB02500,350MIPS@252MHzCPUCPU1ISO7816/259004025WAC90260V50Hz/60Hz38KHz38KHz4LED1,:1)2)2,1):8MHzRFdBmVdBVa230KHzRF8MHzRFRF8MHz8MHzRFb8MHzc1-2dBdQAM/CATVPRX10/PRX8+PRK4Ce18MHz2(RSBW)100KHz100Hz3Vs4V=Vs+lg(8MHz/RSBW)+KsaKsa1.7dBV=Vs+19+1.7=Vs+20.7dBmvdBvfRFRFRF80%RFRFRFRFV1RFVV=V1+10log(8MHz/0.23MHz)=V1+15.4(dBmVdBV)2MERaMERMERS/NMERQAMMER=20log————————————————————————dBMERMER45dBMERCSOCTBMERI0jQ0jjIQIjQjjIQN64MERC/N+IMER=0.441+C/N+I=0.15bQAMCATVMERcd)64QAMMER25dBMER30dB256QAMMER28dBMER33dB364QAMaBERBERDVB“”ETR290MeasurementsGroupETR29064QAMDVB-Cper-FECBER1.0E-4,,,Eb/N0C/NC/N=Eb/N0+10Log(RsxLog2M)/BWEbN01HzRsMBW64QAMDVB-CRs=6.875MbaudBW=8MHzC/N=Eb/N0+7.12(dB)BER1.E-4Eb/N0=16dBC/N=23dBb8MHzc4BERaBERbQAM---16QAM32QAM64QAM128QAM256QAM-------69006875611150004443------kbouds-------30dB0---30dBFECBERRead-Solomon“”ETR290QEFFECBER2.0E-4(10,0002)MPEG-2BERc31aPIDbcPIDdePCR-PIDfPSI/SIgPCRhEPG234aMPEG-2ISO/IEC13818-1ISO/IEC13818-2ISO/IEC13818-3GB/T17975.1-2000()GB/T17975.2-2000()GB/T17975.3-2000()b)ETR154(MPEG-2)TR101290()ETS300468(DVBSIETR211DVBSIEN50083-9DVBSPIASITR101290TR101290PATPMTPIDTR101290PCRPCRPCRPTSCATTR101290NITSIPIDSDTEITPSTTDTDVB-C24TSQAMTSQAMBTA-P100BTA-P100MPEG-2MPEG-2/DVBDVB160Mbps2DVB/MPEG-2TSTSSectionPESPSI/SIESPIDEPGPESES3100Mbps4100Mbps5QAM6QPSK789DVBSPIASIMPEG-2ISO/IEC13818-1ISO/IEC13818-2ISO/IEC13818-3DVBETR154ImplementationguidelinesforMPEG2systemsTR101290MeasurementGuidelinesETS300468DVBSIETR211DVBSIRecommendationEN50083-9DVBSPIASI19012848mm60Mb/sASIBNC75DVB-SBSR-10S75SCPC/MCPC950MHz—2150MHz40dBm—85dBm2Msps—45Msps1/2—7/8DVB-CBSR-10CDVB-CETSI/EN300429QAM16QAM32QAM64QAM128QAM25627Mbps50860MHz-20dBmV+20dBmVRFIEC169Female75SPID25LVDS(EIA/TIASP3357)DVB/ASI188204DTV-ProbeanalyzerDVB——ASITSUSBPIDPCR_PID