EEVblog Electronics Community Forum
Electronics => RF, Microwave, Ham Radio => Topic started by: Bicurico on October 21, 2017, 08:58:07 am
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Hi,
I came across this:
https://www.youtube.com/watch?v=sPYYMtBSit0 (https://www.youtube.com/watch?v=sPYYMtBSit0)
(Immediatly ordered the ADALM-Pluto, of course, but now the waiting begins... Backorder should arrive Dec, 5th)
From here I "discovered" this:
https://github.com/pabr/leansdr (https://github.com/pabr/leansdr)
And then I ended up here:
https://github.com/F5OEO/rpidatv (https://github.com/F5OEO/rpidatv)
Of course, I spent two days figuring things out until I managed to get the first result:
http://vma-satellite.blogspot.pt/2017/10/can-it-be-real-dvb-s-modulator-and.html (http://vma-satellite.blogspot.pt/2017/10/can-it-be-real-dvb-s-modulator-and.html)
Perhaps this is old news for you guys, but if so, WHY didn't you tell me? ;)
Cheers,
Vitor
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Heh. I think that using the GPIO pins as a nasty modulation source has been done for a while now. Bunch of broadcast FM range projects doing that.
The square waves make for some evil splatter all around the thing though. Most folks recommend a good output filter to get rid of the hash.
Of course the super low power helps keep the nastiness pretty much localized to your shack unless you hook the thing to a big outside gain antenna. Then watch out who you’re blasting with it.
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P.S. But yes. It’s still wicked cool anyway. :) And I hadn’t seen the ATV hack. That’s a new one on me! Like.
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I knew about the previous hacks like RF radio transmitter (https://github.com/F5OEO/rpitx), but actually producing a DVB-S signal is quite cool!
Now, while I wait for the Pluto SDR, I am setting up a whole Raspberry Pi image for SDR...
Also, beefing up my Ubunto virtual machine.
I really want/need to learn more about GNUradio. It is amazing what people put together and it makes me aware that I don't know sh*t about any of this... :scared:
Regards,
Vitor