Re-Sampling Acquired Data to Prevent Coherent Sampling Artifacts

摘要

Embodiments of the present invention provide a test and measurement instrument that processes acquired data before it is displayed by re-sampling it with a pseudo-random sampling phase (510,515,540). This data processing step introduces a randomly-varying phase between the signal under test and the sampling clock of the test and measurement instrument, thereby canceling the effect of any synchronization between the two. In this manner, the test and measurement instrument may acquire data based on a clock signal that is very close to, or even synchronized with, the test and measurement instrument's own sampling clock (or a harmonic of it), and yet still provide a smooth, artifact-free display.