... 2.PCR adjusting, output symbol rate DH-803 CATV digital head-end QAM Modulator Description DH-803 QAM Modulator, is the main ... operating High reliability design, stable in running Specifications Modulating mode16,32,64,128,256 QAMSymbol rate3-7Mbaud/sCorrection codingRS Coding188/204Input ... °C(Operating) -20-80°C(Storage)Power220VAC±10%,50Hz,25W DH-803 CATV digital head-end QAM Modulator