GY T 198-2003 有线数字电视广播QAM调制器技术要求和测量方法

GYGY/T198—2003QAMSpecificationsandmethodsofmeasurementonQAMmodulatorusedindigitalcablebroadcastingsystem2004-02-012003-12-19GY/T198—2003GY/T170-2001GY/T106-1999QAMQAMQAMGY/T198—2003QAM1GY/T170-2001GY/T106-1999QAMQAM2GY/T106-1999GY/T170-200133.1modulationerrorratiodB3.2ASIAsynchronousSerialInterfacePCRProgramClockReferenceQAMQuadratureAmplitudeModulationSPISynchronousParallelInterfaceTSTransportStream4QAM119GY/T198—20031QAM1GY/T170-2001264-QAM256-QAM3Mbaud3.66.9524GY/T170-2001A5MHz110MHz862MHzGY/T106-19996kHz257kHz2508dBm-897510dB12-8dBm3264-QAM11dB30256-QAM-8dBm6.875Mbaud12dB40-8dBm6.875Mbaud13dB50-8dBm6.875Mbaud14dBc/Hz-65@1kHz-80@10kHz-100@100kHz-8dBm15PCRns±500-8dBm256-QAM6.875Mbaud16ASIBNC75SPI25()17BNCF7555.15.1.1310-620GY/T198—2003ASI0.1UIPCR50ns5.1.25MHz1000MHz5.1.35MHz1000MHz0.5dB1Hz5.1.45MHz1000MHz-28dBm5.1.55MHz1000MHz210-6PCR50ns5.1.65.25.2.11TSQAM15.2.2a)1QAMQAMb)QAMfcc)fc-4MHzfc+4MHz5.35.3.115.3.2a)1QAMQAM-8dBmCb)QAMfcc)d)fc-14MHzfc-6MHzN1(dBm)e)fc+6MHzfc+14MHzN2(dBm)f)CN1N2(dB)g)110MHz1000MHzS(dBm)h)CS(dB)5.421GY/T198—20035.4.115.4.2a)1QAMQAM-8dBmb)QAMQAMc)64-QAM256-QAM5.55.5.115.5.2a)1QAMQAM-8dBmb)QAMQAMc)1kHz10kHz100kHz5.65.6.12QAM25.6.2a)2QAMQAM-8dBmb)QAMc)QAMd)QAMAdBme)QAMBdBmf)L=A-BLdBQAM5.75.7.13QAM35.7.2a)3QAMb)QAMQAMfc22GY/T198—2003c)QAMfcd)fD=fc-fcfDQAM5.8PCR5.8.14TStTSQAM4PCR5.8.2a)4QAMQAM-8dBmb)QAMQAMTSc)PCR23