The MPA-3 is designed as an ultra fast list mode system with input ports for 2, 4, 8, 12 or 16 ADCs, multiscalers or TDC’s (time-of-flight devices). The open system technology concept is capable of accomodating future system expansion. Two systems can be synchronized to provide a max. of 32 input channels. For dependent single- and multiparameter acquisitions, coincidence resolving times can be set from approx. 150 ns to more than 3 ms in steps of 50 ns. A monitoring mode is available to view single or dual parameter spectra on-line during active data acquisition. List data can be stored on the local hard disk device or any other directly addressable storage device. Using a SATA hard disk drive data can be