HDMI Modulator , 8 independent HDMI input Digital RF modulator. Supports QAM 256/64 and ATSC modualtin and international DVB-T , ISDB-T modulation. MPE2 Video encoding up to 22Mbps, Audio -AC3 Dolby or MPEG2 encoding. Supports low latency , VCT ( vidtual channel number ) . 608 and 708 Closed capioning. The channel asn all settings can be assigned via WEB NMS interface using any brouser or sille by front panel LCD display. Eeach chennel numer and modulation type can be individualy sellected, For examle you cna create 4 QAm cable channels and 4 ATSC of the air channels. Very important , unit support HTCP co it can be used with all video sources like DVD players or Cable TV ,Sattelie , Roku , Apple Tv Set tup boxes.