Some of the most fun I'm having is just browsing frequencies and seeing what I can find!
Sometimes, I encounter signals I can't identify.
For example, at 865-868 MHz, there's a family of slow, continuous, digital signals that make a nice melody when listened to in single-sideband demodulation!
And at 177-180 MHz, there's two very broadband transmissions. Might be TV? But I can't find out what type.
If you have ideas, let me know! :) Time for lunch!
