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DS125DF111: Question about DS125DF111

Jimmy Huang
Genius 3515 points
Part Number: DS125DF111

Tool/software:

Hello：

Regarding the application of DS125DF111. The customer has now made a test board and tried their best to debug it. The result is that the sensitivity of 10GE has improved slightly, but the sensitivity of XGPON has actually deteriorated. The relevant results and configurations are attached.

Can you provide some good suggestions in order to achieve more optimized results? The customer expects more improvement in the 10GE signal and at least no deterioration in the XGPON signal.

The previous communication was as follows：

DS125DF111: Question about DS125DF111 - Interface forum - Interface - TI E2E support forums

  10ge rx_dfe.cfg  10gpon rx_dfe.cfg  

  Test Result.docx

  • 0
    TI__Mastermind 27610 points

    Hi Jimmy,

    Allow me to review and get back to you by the end of this week.

    Best,

    Lucas

  • 0 in reply to Lucas Wolter
    TI__Mastermind 27610 points

    Hi Jimmy,

    Thank you for your patience. I'm confused about a few things here. Can you help clarify?

    1. Can you share more details about the test being performed? Are they measuring the max insertion loss which allows the link to still be present with and without the retimer included?
    2. Are they using the retimer with XGPON burst mode?
    3. The 10 GE config file shows default settings. Is this correct?
    4. The 10G PON config file shows adapt mode 0 (no adaptation) and manual DFE and CTLE values. However override bits for manual DFE and CTLE programming are not enabled, meaning these are not getting set correctly. I can help provide correct register settings, but I'd like to get a better understanding first.
    5. Why does the customer wish to use manual CTLE and DFE values for XGPON operation?
    6. Both config files indicate that no signal is present. Can the customer recapture register dumps while the retimer is in operation so I can check various status registers?

    Best,

    Lucas