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Modern high-speed programmable digital signal processors and array processors have made possible real-time spectrum analysis using the Fast Fourier Transform algorithm on signals with bandwidths up to several hundred kilohertz. While this has opened up large areas of applications for digital signal processing, there are still many types of signals, viz., radar, video, which signal/array processors cannot handle. Signal Processing Systems, Inc., has developed a new FFT Processor called the SPS-1000, similar to the well-known pipelined FFT Processor architecture, but permitting parallel as well as cascaded processing elements. Using a set of standard building-block modules including a Butterfly Module, Storage Module and several supporting module types, FFT Processors and convolvers with throughput rates in excess of 13 MHz can be configured.