MD-QUAD Quad-Split MultiViewer from Decimator is a video control device that composites four inputs into a single quad-view monitor output. It accepts multiple SDI inputs and provides configurable window layouts, scaling, and aspect-ratio options with on-screen status information. The unit supports real-time preview, includes independent audio monitoring per channel, offers control interfaces such as RS-422 and Ethernet for integration into live production workflows, and provides tally indicators.