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Altera_Forum's avatar
Altera_Forum
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10 years ago

de0-Nano noise on outputs

Hi,

Just working on a project with my De0-Nano, outputting a data stream to a DAC and noticed that the boards output pins are pretty damn noisy. Don't have an analyzer getting around 1.5V pk-pk noise riding my output. Is this normal for the board?

Cheers, Chris.

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    10 years ago

    That is not normal. Check your power rails, ground connections. How are you measuring the noise? What frequency is it at?

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    10 years ago

    Are you sure this is real noise? Could it rather be a measure problem, i.e. noise caught by your test probe?

    In either case, check if the ground reference is the same on both sides.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    10 years ago

    Thanks for the heads up guys I appreciate the responses, I had the project apart and cleaned up some messy areas. Everything is working as expected now.