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LMH0397: output error

zhang ping
Genius 3835 points
Part Number: LMH0397

Tool/software:

E300 _ 027_0397_ASI1.pdf

We are debugging the first version again, but the output has been abnormal and there is no output. What suggestions do you have for the schematic design? What are the suggestions for the cause of the malfunction?

  • 0
    TI__Guru* 93670 points

    Hi Ping,

    By output, are you referring to the 75-ohm cable driver output or 100-ohm output? 

    Suggestion is to remove VD9 and GDT4. Then in this case device should work as a cable equalizer and expect to see output on SDI_RX1p and SDI_RX1n 100-ohm outputs. Note R330 and R331 are not loaded so device will work in equalizer mode.

    Regards, Nasser