Re: RfnocError: OpTimeout: Control operation timed out waiting for space in command buffer

2022-01-06 Thread Martin Braun
Christoph, we have occasionally heard about this issue. Can you please open an issue on https://github.com/EttusResearch/uhd/issues. The more data we have on this, the better. It's possible this may affect other USRPs, too. --M On Fri, Nov 26, 2021 at 9:10 AM Christoph Schultz (Riedel) <

Re: Error with two versions of GNU Radio: 3.7.13.4 and 3.8.0.0

2022-01-06 Thread Martin Braun
Isaac, we've sunsetted GNU Radio 3.7, so any issues with that version of GNU Radio will remain where they are, unfortunately. --M On Mon, Nov 29, 2021 at 3:41 PM isaac mario tupac davila < isacct...@gmail.com> wrote: > Hello > > I'm Isaac. I've installed GNU Radio 3.8.0.0, my second version of

Re: How to Change the modulation mode of "constellation decoder" in real time?

2022-01-06 Thread Martin Braun
Hey, I don't see a conceptual reason why you can't change the equalizer at runtime, but you have to be careful to not get into concurrency issues. You should hold onto a reference to your new equalizer until some condition is met, and then replace d_eq at "the right time", whatever that is

Re: Rate matching between host and SDR

2022-01-06 Thread Martin Braun
Moses, software doesn't run at fixed rates. Instead, you keep track of how many samples you've transmitted. If you're underrunning, then your software design is slower than the hardware clock of your USRP. In your case, you're also not signaling an "end of burst" (also you're copying fcpxIQ

Re: Peaks when increasing the FFT lenght ofdm example

2022-01-06 Thread Martin Braun
Did you repost this accidentally, or is this a new question? On Thu, Jan 6, 2022 at 12:15 PM Pedro Viegas wrote: > Hi everyone, > > I'm having a problem when I increase the number of carriers from 64 to 512 > in the gnuradio OFDM example. When the number of carriers is 512, the > complex

Re: Regarding open source

2022-01-06 Thread Martin Braun
Gunesh, if you decide that you do want to contribute to GNU Radio (which we would be happy about), make sure that you first go through most of the GNU Radio tutorials, and make sure that you can build and install GNU Radio from source without requiring external help. These are things that you

Re: Headless Airspy operation on Raspberry Pi

2022-01-06 Thread Martin Braun
Glen, thanks a lot for sharing this! --M On Mon, Jan 3, 2022 at 7:06 PM Glen Langston wrote: > Hello and Happy New Year to all, > > We’ve just released a version of the Raspberry PI OS that works with > Airspy R2 and Airspy Mini, > as well as SDRPlay RSP1A, PlutoSdr and RTL-SDR. > > It is

Rate matching between host and SDR

2022-01-06 Thread Moses Browne Mwakyanjala
Hi everyone, I'm experimenting with a C++ standalone USRP transmitter using the function shown below. The data is generated by another function called Modulate() which "posts" the modulated IQ samples to this function. The transmitter works very well for burst transmissions (individual packets). I