DesignCon 2007
نویسنده
چکیده
Oscilloscopes have been used extensively to analyze the jitter performance of serial data links providing estimates (measurements) of total jitter as well as its “random” and “deterministic” parts. Higher speed serial data signals containing jitter from sources such as crosstalk and multi-Gaussian random noise can cause traditional oscilloscope-based methods to greatly over or under estimate the total jitter. This paper presents a comparison of several common methods for estimating total jitter using spectral and statistical techniques, as well as a new method (Normalized Q-Scale). Results are shown for both real and simulated (Monte-Carlo) measurement scenarios, giving insight into weaknesses and strengths of these methods. Specifically, issues of accuracy, precision, convergence or robustness are treated.
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