The Rigol MC3648 is a 4Ãƒâ€”8 two-wire matrix switch. The 32 two-wire crossing points can connect any combination of inputs and outputs at the same time. The MC3648 is used to connect multiple devices to multiple points on the device under test at the same time for simultaneous measurements. The rows and columns of the multiple matrix can be connected to form a larger matrix (e.g. 8Ãƒâ€”8 or 4Ãƒâ€”16). However, the number of crossing points cannot exceed 160.