4 ms·
It is a poor design on the part of the altimeter designers. 200MHz should be plenty far away.
by stingrae 5y ago
It is a poor design on the part of the altimeter designers. 200MHz should be plenty far away.
- mcguire 5y agoOr poor design on the part of 5G transmitter designers?
- snovv_crash 5y agoThe problem is the altimeters listening outside of their band, not the transmitters speaking outside of theirs. 200Mhz is an eternity away. You can fit all of the 2.4GHz WiFi/Bluetooth/whatever unlicensed band in that.
- mcguire 5y agoIf the transmitters weren't leaking outside the assigned band, there wouldn't be a problem, right? Those transmitters are the best new tech, right?
- charrondev 5y agoNo the idea is the transmitters are transmitting properly, and the receivers are “listening” outside of where they should be.
- Phrodo_00 5y agoThe transmitters aren't leaking out of their assigned band
- stingrae 5y agoThe transmitters have FCC specs on how much power can leak outside of the band (It's called the band edge requirement). If the radar can't handle this out of band power transmission, then the FCC is on the line for writing a spec that isn't protecting the bands that they operate. It is unlikely this is the case given how far out of band this is.
- rocqua 5y agoNo, the 5G transmitters are in their designated spec, and 200Mhz away from the altimeter frequencies. The problem is that the radio altimeters might not have proper filtering, which wasn't a problem in the past because the spectrum now allocated to 5G was not seeing much powerful transmissions. The radio altimeters are fully up to spec, but the spec does not say enough about filtering out signals outside of the required band. This oversight in the spec was never much of an issue because of the aforementioned lack of usage in the spectrum before 5G.