• EMC testing question

    From bitrex@21:1/5 to All on Wed Oct 9 19:05:10 2024
    What's the deal with the "CPU board" exemption?

    "CPU board. A circuit board that contains a microprocessor, or frequency determining circuitry for the microprocessor, the primary function of
    which is to execute user-provided programming, but not including:
    A circuit board that contains only a microprocessor intended to operate
    under the primary control or instruction of a microprocessor external to
    such a circuit board; or
    A circuit board that is a dedicated controller for a storage or
    input/output device."

    So if one sells a board that has say a PIC on it and some support logic,
    and the 9kHz+ signals are all internal to the uP (self-clock), but it's otherwise a functionally complete design other than it's not in a
    housing, is that an exempt product?

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