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Thread: Low-Power interference close to USB ports

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  1. #1

    Default Low-Power interference close to USB ports


    I've caught this signal radiating from my own computer making me believe there was an interference in my WLAN. Any ideas on what it could be? Even though I turn all radios off (GPS, LTE/3G, WLAN) the signal still persists.
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  2. #2


    In case anyone is interested in this one. I found the source of the radio signature shown in the picture. It was the inherent broadband noise generated by USB 3.0.
    USB3 uses FHSS to enable higher data rates but it may interfere with the 2.4GHz ISM band. In my case, it definitely does!


  3. #3


    Thanks for the update.
    Old Mod by the Sea

  4. Default

    Quote Originally Posted by ua549 View Post
    Thanks for the update.
    Yes, thanks for posting! One thing I would add to this is that because of USB 3.0's inherent interference, all of those "USB 3" Wi-Fi adapters don't actually use USB 3. According to one of our old hardware engineers, they are capable of it, but in his testing, they all end up switching back to USB 2.0 speeds because of the interference.


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