Software Defined Radio Academy 2021 starting today 1100UTC

Dear Lists, please feel invited to participate in this year's Software Defined Radio Academy 2021, together with our common day with European GNURadio Days, which is starting today at 1100 UTC. Here is our programme: https://2021.sdra.io/pages/programme.html You can join via YouTube: https://

qt gui frequency sink problem with PSD level

Hi all, I wonder if this is a bug or what: I just make a QPSK constellation on the unit circle with a quite random data and look at the spectrum by "QT GUI Frequency Sink" block in GRC. With these parameters: FFT size = 1000 Window type = None OR Rectangular I should see a flat line as the

flowgraph ret -11 when oot block calls gr::filter::firdes::low_pass_2

I am having difficulty using gr::filter::firdes in my OOT cpp block. (Trying to use code block in notorious webmail editor for gmail, sorry if this gets a little garbled) I am calling my setter function as follows... ```cpp set_filter( 31.25f, 50.0f, 96.0f ); ``` And this is the setter func