Product picture - Meridian Technologies DigiFlex DR-4V 1F-5 4-Channel Video Multiplexer with Return Manchester, RS-422, or Bi-Phase Data System Receiver Card Meridian, Technologies, DigiFlex, DR-4V, 1F-5, 4-Channel, Video, Multiplexer, with, Return, Manchester, RS-422, or, Bi-Phase, Data, System, Receiver, Card Click the image to close this page