3 ms·
This is all ridiculous, there's still a 200 MHz band guard between the FAA band and the 5G proposed band. Here is what a $1 ESP wifi dongle has to follow: htt
by guerby 5y ago
This is all ridiculous, there's still a 200 MHz band guard between the FAA band and the 5G proposed band.
Here is what a $1 ESP wifi dongle has to follow:
https://en.wikipedia.org/wiki/IEEE_802.11 https://en.wikipedia.org/wiki/IEEE_802.11
"The mask requires the signal to be attenuated a minimum of 20 dB from its peak amplitude at ±11 MHz from the center frequency"
So 2 dB/MHz filter.
I let you do the math.
FAA is just ridiculous here if they let old junk radio hardware handle safety landings for airplanes, but well after 737 max what do you expect...
- redis_mlc 5y ago
- p_l 5y agoThe super wide bandwidth is on purpose - not accidental. It's also not "old junk", it was serving perfectly fine till some people decided they wanted to change the rules, and even then, work on avoiding interference been ongoing for decades due to different sources of interference. n.b. Wifi (and BT and others) got to use 2.4GHz band because of interference from aircraft kitchens causing a push to make 2.4GHz into junk spectrum with less regulation.