[SI-LIST] TDR questions

  • From: Joel Brown <joel@xxxxxxxxxx>
  • To: SI-List <si-list@xxxxxxxxxxxxx>
  • Date: Tue, 1 May 2012 09:33:23 -0700

I am considering renting a TDR to characterize a SATA 6 GB/S signal path
including cables, connectors, boards, etc.
I also would use the TDR to derive an s-parameter model that I could use
for simulation to see what the resulting eye diagram would look like.
I have done some simulation already using s-parameter models for some parts
of the path but i don't have models for everything.
I know that TDR has a resolution based on rise time of the pulse.
The units I am looking at range from 15 to 40 ps with price scaling
accordingly.
I am not sure if the resolution would be good enough to generate useful
data for smaller structures such as vias and connectors.
I also wonder if the rise time of the TDR is faster than the actual SATA
signal then it would be good enough.
Is there perhaps a better approach than using a TDR?
Thanks


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