Yes, I am currently testing with this example (rfnoc_radio_loopback.grc<https://github.com/gnuradio/gnuradio/blob/main/gr-uhd/examples/grc/rfnoc_radio_loopback.grc>) only. However, the example was for x300 and I am testing in n300 board. The example works only if rx and tx streamer is present i.e. for the following chain.
Rx_Radio > DDC > rx streamer > tx streamer > DUC > Tx_Radio chain. Sending the data to host adds a huge time delay which we don't want in our application. Is there any way to run the example design as it is i.e. for Rx_Radio > DDC > DUC > Tx_Radio chain with n300 board? It gives RuntimeError: RfnocError: Adding edge without disabling is_forward_edge will lead to unresolvable graph!. between RX radio and DDC chain. Tried different combinations of making back edge property true for all the chain, but it's not working. Also, we have kept timing information of RX radio disabled. ________________________________ From: Martin Braun <martin.br...@ettus.com> Sent: Thursday, December 12, 2024 3:20 PM Cc: usrp-users@lists.ettus.com <usrp-users@lists.ettus.com> Subject: [USRP-users] Re: Issue with Starting Transmitter on USRP N300 without Using Streamers On Thu, Dec 12, 2024 at 6:23 AM Nidhi Panda <nidhi.pa...@cyronics.com<mailto:nidhi.pa...@cyronics.com>> wrote: Thank you so much for your response. We have tested the "rfnoc_radio_loopback" cpp example and it works fine. Just that I am not good with cpp that's why I wanted to do this with either python or GNU radio. GNU radio also includes an example of loopback for x300 board. I changed it for n300 board. And as you suggested, the timing information of RX is set to false and also the last edge is used with back edge property "True" setting. However, that design works only for Rx_Radio > DDC > rx streamer > tx streamer > DUC > Tx_Radio chain. Sending the data to host adds a huge time delay which we don't want in our application. Is there any way to run that for Rx_Radio > DDC > DUC > Tx_Radio chain. Is there any example available in python or GNU radio. Here's a GNU Radio demo: https://github.com/gnuradio/gnuradio/blob/main/gr-uhd/examples/grc/rfnoc_radio_loopback.grc --M
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