Methods and systems for analyzing decomposed uncorrelated signal impairments

摘要

Method and systems are described for estimating signal impairments, in particular jitter that includes uncorrelated, non-periodic signal impairments. One system may take the form of an oscilloscope. The estimates may take the form of a probability density function (PDF) for uncorrelated signal impairments that has been modified to replace low probability regions with a known approximation and an extrapolation of the known approximation.

主权项

1. An oscilloscope for estimating a probability density function (PDF) for non-periodic, uncorrelated jitter comprising:
control means operable to execute instructions for modifying a compound distribution representing acquired data that comprises non-periodic, uncorrelated jitter by:
identifying low probability regions in the compound distribution;identifying a known approximation that models a distribution of at least a first portion of the low probability regions;removing the low probability regions; andreplacing the removed low probability regions with the known approximation and an extrapolation of the known approximation; a user interface for activating signal impairment analysis, and for indicating when the analysis is completed; and a display unit for displaying the user interface.