Author Topic: Using the Raspberry Pi as a DVB-S modulator & transmitter without extra hardware  (Read 380 times)

0 Members and 1 Guest are viewing this topic.

Online Bicurico

  • Frequent Contributor
  • **
  • Posts: 449
  • Country: pt
    • VMA's Satellite Blog
Hi,

I came across this:



(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

And then I ended up here:

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

Perhaps this is old news for you guys, but if so, WHY didn't you tell me?  ;)

Cheers,
Vitor
 

Offline denverpilot

  • Contributor
  • Posts: 43
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.
« Last Edit: October 24, 2017, 05:46:54 PM by denverpilot »
 

Offline denverpilot

  • Contributor
  • Posts: 43
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.
 

Online Bicurico

  • Frequent Contributor
  • **
  • Posts: 449
  • Country: pt
    • VMA's Satellite Blog
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
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf