SPUR DETECTION IN A SAMPLED WAVEFORM IN A MIXED ANALOG/DIGITAL SYSTEM USING THE PHASE OF THE FREQUENCY RESPONSE

Method, apparatus and computer program product for spur detection in a sampled waveform in a mixed analog/digital system using the phase of the frequency response comprising acquiring a sample waveform including a set of discrete uniformly spaced samples from a target system, wherein the sample waveform is a time domain vector; applying FFT transforming the time domain vector into the frequency domain; analyzing the frequency domain response including calculating the phase response; and determining whether the sample waveform has spurs including comparing the phase response to a clean phase profile including determining that the phase response having a phase profile value outside a phase deviation tolerance has one or more spurs and determining that the phase response having a phase profile value inside the phase deviation tolerance has no spurs, wherein a spur indicates unaligned data having a delayed bit flip.