Simrar: Simulated receiver and recorder for statistical measurements

Simrar is an analog radio receiver simulator and statistical recorder. The simulator is composed of typical analog computer components which provide versatility in simulating receiving systems. A control circuit automatically cycles the machine through a present number of statistical trials. On each trial, amplitude discriminator circuits determine if the input to the measurement system has exceeded a selected threshold level. Counters record the total number of trials on which each threshold level has been exceeded, and over a large number of trials an accurate estimate is obtained for the probability that a level will be exceeded.