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Altera_Forum's avatar
Altera_Forum
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9 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
    9 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
    9 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
    9 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.