Oh, I forgot to mention. With the existing Replay block, you should be able to load your FMCW waveform in device memory and play it out continuously. I don't know if the X410 has Replay memory bandwidth limitations that would restrict your ultimate FMCW bandwidth. But, you might want to try it out using "rfnoc_replay_samples_from_file" which can play out any arbitrary waveform (including FMCW if you create it). If this generates a signal that works for you, then you only need to figure out how to control it from gnuradio. Rob
On Thu, Aug 24, 2023 at 10:03 AM Rob Kossler <rkoss...@nd.edu> wrote: > I think that you could implement this transmit waveform in a custom RFNoC > block such that you would never have any issue with underruns. Although I > don't use gnuradio myself, I believe that you could control your block > easily from gnuradio. And, although this requires some FPGA programming, > this would likely be a straightforward FPGA implementation. > Rob > > On Wed, Aug 9, 2023 at 11:54 PM <h57jaf...@gmail.com> wrote: > >> Hi, >> >> TX/RX benchmark works well even up to 245.76MHz of sample rate with my >> USRPX410 (on 10GbE link). >> >> While USRPX410 receiver channel handle high sample rates even far more >> than 100Msps (245.76MHz), I am not able to transmit high sample rate >> triangular FMCW waveform with USRPX410 in GNU Radio (by employing VCO to >> generate chirp signal). It seems VCO (and VCO complex) are not able to >> generate FMCW signal in high sample rate more than 50Msps, and It issue >> several underrun errors. Is there any solution to overcome it. >> >> Or without using VCO, what are the other solutions to transmit triangular >> FMCW waveform through GNU Radio and USRPX410? Thank you. >> _______________________________________________ >> USRP-users mailing list -- usrp-users@lists.ettus.com >> To unsubscribe send an email to usrp-users-le...@lists.ettus.com >> >
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