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      I don’t quite understand the line at which EMC testing becomes mandatory. Is every electronic device sold in the US going through this? Is there a trick to get around this? Why is FB needing to do this for its own equipment?

      Thinking now of whether every iPhone SKU has to go through this, with every cartesian product of memory chip size and other component replacement. Especially the whole thing about how testing slots seem to be very hard to get, kinda surprised anything ships!

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        The line is pretty crisp from an FCC perspective: anything with anything about 9kHz (that’s a “k”!) needs to be certified to meet FCC regulations. So yes, that’s every iPhone SKU etc. (for whom this is more complicated because it actually is a radio – and it can only be transmitting within approved bands, etc.) – but it’s also more or less everything else too. The FB story (which was apparently not part of our recorded session?) was around getting gear into a datacenter in Sweden – so effectively importing equipment into the country, which necessitated local regulatory compliance.

        And yes, it’s hard/time consuming/etc. – though presumably easier for products at lower power than a 15 kW rack!

    🇬🇧 The UK geoblock is lifted, hopefully permanently.