BS-501 HIGH-SPEED CORRELATOR.
BAY STATE ELECTRONICS CORP WALTHAM MASS
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This report describes the design and development of an experimental real time audio bandwidth 50 to 5000 cps correlator that will display a correlogram while operating on line. The correlation index is displayed as a function of relative delay and time for either auto or cross correlation. The correlogram is presented as a three-dimensional display on the CRT of a self-contained oscilloscope with the X axis presenting time, Y axis relative delay and Z intensity representing the correlation index. Signal input circuitry includes a normalizing AGC function with 40 db dynamic range along the necessary gross input level controls and metering. A five-bit A to D converter drives a recirculating memory speed up system. Appropriate clock, accumulator, and compute circuits are used to approximate correslation coefficient at a real time rate. The output D to A converter drives the Z axis of the oscilloscope to indicate the correlation coefficient. The operating features of this device are given. Author