Method for performing joint jitter and amplitude noise analysis on a real time oscilloscope

摘要

A method for determining jitter and noise of an input signal. The method includes acquiring one or more uncorrelated waveform records by an acquisition unit of a test and measurement instrument, determining a correlated waveform from the acquired waveform(s), dividing the correlated waveform into unit intervals, dividing an uncorrelated waveform into unit intervals, measuring a timing displacement (t₁) between the correlated waveform and the uncorrelated waveform for each unit interval to form an apparent-jitter array ([t₁]), measuring a voltage displacement (V₁) between the correlated waveform and the uncorrelated waveform for reach unit interval to form an apparent-noise array ([V₁]), calculating a horizontal shift (t_s) between the correlated waveform and the uncorrelated waveform for each unit interval to form a compensated edge time array ([t_s]), and calculating a vertical shift (V_s) between the correlated waveform and the uncorrelated waveform for each unit interval to form a compensated amplitude voltage array ([V_s]).