DH-803 CATV digital head-end QAM Modulator 1.Complying DVB standard signal channel coding ... 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, ... ±10%,50Hz,25W DH-803 CATV digital head-end QAM Modulator