... 1.QAM Modulator; 2.4 ASI inputs, 1 RF output; 3.support QPSK,16QAM,32QAM,64QAM,128QAM and 256QAM 4.FEC fuifill DVB-C QAM-4 QAM Modulator ... , the four-way TS, without multiplexing, are transferred to QAM Modulator, and are processed with intermediate frequency (four adjacent frequency ... to maximal reliability and availability;-20dB testing interface with RF output;Power off memory. QAM-4 QAM Modulator