Whatever Happened to Trigger Jitter?

Sometimes before I retire for the evening, there are things that make me go “Hmm” in the night. For as I long as I can remember, trigger jitter was one of those specs that everybody wanted to know about every time they made a measurement. This spec fundamentally affected critical signal integrity measurements like setup/hold timing, clock jitter, and eye diagram analysis. In the past few years, however, I’ve had fewer and fewer conversations around trigger jitter. One reason is that high-performance scopes today have trigger jitter less than 500 fs. Beyond the significant reduction in trigger jitter, let’s look at how the technology has changed in each of the three areas mentioned above and understand why the trigger jitter spec has fallen in importance.

To read the rest of this article please visit my Scope Guru on Signal Integrity Blog, on EDN’s site.

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