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Comment by MobiusHorizons | Hacker News Reader

How is it extraordinary? Equipment is typically required by law to operate only within its specified frequency bands. 5G spectrum was never allocated to aircraft radar altimeters.

I agree that quoted suggestion lacks nuance in the history that brought us to this state, but from a technical perspective it does not seem extraordinary. More that it simply advocates a very expensive and uncooperative way to solve a problem of the commons.

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Equipment is required to emit only within its allocated frequency bands. No-one is suggesting that the radar altimeters are emitting outside of their allocation; but there's no law that says that devices have to be immune to interference from other transmissions outside their allocated bands.

There’s definitely laws that say certain equipment had to “accept” interference from lawful transmissions. You’ll find a label to that effect on every piece of 802.11 and Bluetooth gear in the US, for starters.

“Immunity” is largely your own problem though.

>There’s definitely laws that say certain equipment had to “accept” interference from lawful transmissions. You’ll find a label to that effect on every piece of 802.11 and Bluetooth gear in the US, for starters.

That's specifically for unlicensed Part 15 devices ref. https://www.ecfr.gov/current/title-47/chapter-I/subchapter-A... ... the point of that wording is that unlicensed devices have no rights vs. licensed emissions.

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