Outline NDS3931 4 to 4 FTA IRD is a cost effective integrated design of four DVB-S2/S(optional) IRD in one U rack space, every single set performs and operates like a single FTA ASI IRD with separate set of (2 ×CVBS, 1 ×Audio L, 1 ×Audio R) and dual (mirrored) ASI. This modularized design largely saves the cost of the transport freight, the space of frame rack and power consumption. In general, it greatly optimizes the functionality and structure of the normal standard-alone FTA IRD. Features MPEG2 and DVB-S standards compatible