14 ms·
If you really want to see terrible noise in a big metro area, look at a spectrum analyzer and the 900 MHz band noise floor in a major metro area from things lik
by walrus01 5y ago
If you really want to see terrible noise in a big metro area, look at a spectrum analyzer and the 900 MHz band noise floor in a major metro area from things like intercoms, baby monitors, smart grid power meter systems, etc.
Best seen if you have something like a fairly "high" gain 3 to 4 foot length single polarity yagi tuned for 890-920 MHz and can connect it so a spectrum analyzer, and sweep it around.
It's a minor miracle that something like low bitrate LoRA in 915 MHz works at all in a major US city.
- drmpeg 5y agoHere you go. However, noise and interference are two different things. https://www.w6rz.net/902-928MHz.mp4 https://www.w6rz.net/902-928MHz.mp4
- walrus01 5y agoI'm honestly surprised it's not higher than an overall average below -100, though if one looks at a narrower range and those spikes that bring the local noise floor to -80 in a few specific frequencies, it's definitely noisy.
- jcims 5y agoIs that in a metro area? I I think i have that much noise in my house.
- jcims 5y agoOr grab one of these bad boys. https://www.crowdsupply.com/krakenrf/krakensdr https://www.crowdsupply.com/krakenrf/krakensdr