kakiitek
Junior Member level 1
Hi all,
Needed some pointers.
Jitters - We have measured some LVDS clocks of around 2.5GHz and through the oscilloscope we are able to getting statistical measurement like these below -
Jitter (peak to peak) (ps)
Jitter (6 * delta) (ps)
N-cycle jitter
Cycle to Cycle Jitter
Question - How do we judge if the level is above what is acceptable respective to our circuits? Are there any articles or examples that will guide us on this?
Eye Diagram - There are many articles that say, the bigger the eye opening the better. But how shall we quantify the threshold of what is ok and what is not? I mean we could always define an eye mask and say there is an opening. And if the eye is not that well formed, we will just draw a smaller eye mask opening. But how shall we know if that is too small?
Appreciate if anyone could point me to any articles on these. Many thanks.
Best rgds,
kaki
Needed some pointers.
Jitters - We have measured some LVDS clocks of around 2.5GHz and through the oscilloscope we are able to getting statistical measurement like these below -
Jitter (peak to peak) (ps)
Jitter (6 * delta) (ps)
N-cycle jitter
Cycle to Cycle Jitter
Question - How do we judge if the level is above what is acceptable respective to our circuits? Are there any articles or examples that will guide us on this?
Eye Diagram - There are many articles that say, the bigger the eye opening the better. But how shall we quantify the threshold of what is ok and what is not? I mean we could always define an eye mask and say there is an opening. And if the eye is not that well formed, we will just draw a smaller eye mask opening. But how shall we know if that is too small?
Appreciate if anyone could point me to any articles on these. Many thanks.
Best rgds,
kaki