Product picture - Meridian Technologies DigiFlex DT-4V 1F-2 4-Channel NTSC PAL Video Multiplexer with 1-Channel Return RS-422 Manchester Bi-Phase Data System Transmitter Card Meridian, Technologies, DigiFlex, DT-4V, 1F-2, 4-Channel, NTSC, PAL, Video, Multiplexer, with, 1-Channel, Return, RS-422, Manchester, Bi-Phase, Data, System, Transmitter, Card Click the image to close this page