Abstract: An improved multi-unit analyzer is provided by virtue of the present invention. An analog-to-digital converter (A/D) digitizes a multi-unit signal, a pulse detector triggers when the multi-unit signal reaches a specified threshold, and a pulse sampler outputs a packet of samples of the signal around the point where the signal passes the threshold. The packet is then transformed into a point on a plane, the P-plane. The transformed point is compared to one or more rectangles in the P-plane, to determine if the point falls within any rectangle. If a point falls within a rectangle, a pulse is output on a line corresponding to the rectangle. This compare and output process is given a high priority. A low priority process displays the packet of samples in a window corresponding to the rectangle which encloses the point in the P-plane which results from the transformation of the packet of samples.