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DS110DF1610: about using SigCon architect software to debug DS110DF1610

lucy.zhang
Prodigy 40 points
Part Number: DS110DF1610
Other Parts Discussed in Thread: DS250DF410

Hello TI,

         Questions about using SigCon architect software to debug DS110DF1610:

  1. When manually adjusting parameters for RX EQ/DFE, what is the meaning of these values and how to set them? Some values are randomly set, but there seems to be no change to the signal. How can I make the set values take effect?

       2.When debugging Tx FIR/VOD, what is the meaning of these values and how to set them?

Thanks,

jack

  • 0
    TI__Mastermind 37123 points

    Hi Jack,

    DFE taps can be set by entering values and pressing "set taps".  For CTLE boost settings, you may need to select and press the "Apply to Channel" button.  These values adjust the RX equalization, so their effect will be most apparent in the eye measurement that the retimer takes.  The different adapt modes allow the retimer to automatically adapt some of the settings.

    TX FIR values can be set by pressing "set taps".  These adjust the TX equalization.  The screenshot below from the DS250DF410 datasheet shows how pre/post cursor affect the waveform.

    Thanks,

    Drew

  • 0 in reply to Drew Miller1
    Prodigy 40 points

    hi,Drew

    Thank you for your reply.Please help me look at the following questions:

    1. Eye Chart: Is the following eye chart normal? Why do eye images captured multiple times vary greatly?

    2. The eye diagram of a channel on my device is shown below. The signal quality performance does not seem to be optimal. How can I adjust it to 0.4UI/200mV? What parameters need to be adjusted?

    Thanks,

    Jack

  • 0 in reply to lucy.zhang
    TI__Mastermind 37123 points

    Hi Jack,

    1) It does seem a bit unusual that the eye diagrams are not consistent between measurements.  Is it possible to view the error hit count and error hit density tabs as well?

    2) 0.4UI and 200 mV are minimum recommendations.  0.6 UI and 350 mV seems like a decent eye measurement.  I would recommend doing BER testing to confirm error free operation across the channel.  The retimer also has built in PRBS error checker and generator that can be used for debug and testing.

    Thanks,

    Drew