DH-803 CATV digital head-end QAM Modulator 1.Complying DVB standard ... 2.PCR adjusting, output symbol rate DH-803 CATV digital head-end QAM Modulator Description DH-803 QAM Modulator, ... is the main equipment CATV digital head-end, receiving DVB transport streams which come from coder, multiplexer, DVB gateway, scrambler, video ... (Storage)Power220VAC±10%,50Hz,25W DH-803 CATV digital head-end QAM Modulator