... cable TV (CATV) headend: Equipment combining QPSK decoding with QAM modulation QPSK to QAM Trans Modulator for cable TV (CATV) headendFeaturesComplying ... design, stable in runningEquipment combining QPSK decoding with QAM modulationSpecificationQAM decoding unit index Modulating mode 16, 32,64,128,256 ... ~80(storage)Power 220VAC±10%,50Hz, 25W QPSK to QAM Trans Modulator for cable TV (CATV) headend