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Abstract
When a roughly flattopped pulse electrical pulse is recorded by a digitizer, signal clipping can destroy information that is crucial to the experimenter. This is particularly true in release-overtake shock experiments, where the occurrence time of a change in slope at the top of a photomultiplier pulse is sought. We have invented a simple and accurate method to record the pulse that is robust to clipping. The digitizer records the signal through a high-pass circuit. The inverse of the high-pass filter is applied via fast Fourier transform during analysis. The insensitivity to clipping allows one to record the change in slope signature at a higher gain, and thus with an improved signal to noise ratio. The technique is generically applicable to any recording of a roughly flattopped pulse.
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