Receive Analog Video Radio Signals from Scratch

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If youā€™ve been on the RTL-SDR forums lately you may have seen that a lot of work has been going into the DragonOS software. This is a software-defined radio group that has seen a lot of effort put into a purpose-built Debian-based Linux distribution that can do a lot of SDR out of the box. The latest and most exciting project coming from them involves a method for using the software to receive and demodulate analog video.

[Aaron]ā€™s video (linked below) demonstrates using a particular piece of software called SigDigger to analyze an incoming analog video stream from a drone using a HackRF. (Of course any incoming analog signal could be used, it doesnā€™t need to be a drone.) The software shows the various active frequency ranges, allows a user to narrow in on one and then start demodulating it. While it has to be dialed in just right to get anything that doesnā€™t look like snow, [Aaron] is able to get recognizable results in just a few minutes.

Getting something like this to work completely in software is an impressive feat, especially considering that all of the software used here is free. Granted, this wouldnā€™t be as easy for a digital signal like most TV stations broadcast, but thereā€™s still a lot of fun to be had. In case you missed the release of DragonOS, we covered it a few weeks ago and itā€™s only gotten better since then, with this project just as one example.



from Blog ā€“ Hackaday https://ift.tt/3doTjC0

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