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Basically your best case jitter is if you reclock the data and use the recovered clock to trigger the scope viewing the reclocked data.
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This is not a good option for me because i would no longer look at the actual data on the 2nd downstream PCIe connector.
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Second best case jitter is to recover the clock and use it to trigger the scope viewing non-reclocked data.
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How did you recover the clock? I have found no circuit that actually outputs the clock from a 2.5 gbps 8b/10b diff signal. If the solution is fairly simple i could build this circuitry into the 'SMA board' and get better overall result.
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I tested about 8 different methods. Using the complementary data signal to trigger the scope came in 6th.
However, the test case was for pathological SDI data and your 8b/10b will perform better. Also, all you care about is rise/fall times and amplitude. You'll be fine.
Jake
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This may be good enough if i can't figure out how to do the clock recovery.
Thanks.
Honored Contributor
