Strategy to color crosstalk source question

[yefj]

Hello ,given a layout with multilayer traces.On certain trace there is a high distrotion due to cross talk.
Is there a strategy to see from where the cross talk is coming from?
To color different contributions of the spectrum noise and have indiction the source of it?
Is there such a thing?
Thanks.

 

[Baluncore]

Is there a strategy to see from where the cross talk is coming from?

Feed a PRBS or a wide-band noise into one line, while you terminate both ends of the other line, then look for the signal in the other line's terminations.

It seems that you do not have cross-talk between what are assumed to be uncorrelated signals, but coupling between phase locked signals. The cross-talk analysis is not expecting correlated channels, so it might be breaking that assumption.

Keep the signals far apart. Use tracks above and below the PCB, not one track above a shared ground plane.