Patent ID: 6577964
Filing Date: 2003-06-10
Classification: G01R

Abstract:
An apparatus for determining compliance margin of a waveform relative to a standard, comprising:an acquisition system capturing the waveform by obtaining multiple records of an applied signal in a display space; a memory storing a series of scaled masks represented in the display space, each scaled mask in the series being scaled relative to the standard according to a corresponding scale factor within a predefined range of scale factors; a comparator determining which of the scaled masks in the series coincides with the waveform at at least one predesignated location in the display space based on comparison of the waveform to the represented series of scaled masks at the at least one predesignated location in the display space; an output device indicating the compliance margin of the waveform based on the corresponding scale factor of the one of the scaled masks in the series that coincides with the waveform at the at least one predesignated location in the display space.