Yeah, that's the problem. The current RFNoC architecture doesn't allow for two full-rate outputs from a single block, because the two outputs share the same port on the crossbar.
The best solution is to write a custom splitter block which instantiates two noc_shells, and wire them both to the crossbar in rfnoc_ce_auto_inst_x310.v. If you get stuck doing this I can dig up some example code. Nick On Tue, Jun 25, 2019 at 6:50 AM Adrià Amézaga via USRP-users < [email protected]> wrote: > Hi Jonas, > > I use the full sampling rate for the TX sweeps since most of the > instantaneous bandwidth of the UBX is used. > > Transmitting at these rates over 1Gig Ethernet would not be possible, so I > generate them using an RFNoC block inside the FPGA. > > Adrià > El 6/25/2019 a las 3:22 PM, Jonas Manthey escribió: > > Hi, > > > > I cannot answer your question, but out of curiosity: why do you use a > RFNoC? Seems like overkill to me. > > > > Cheers, > > Jonas > > > > *From:* USRP-users [mailto:[email protected] > <[email protected]>] *On Behalf Of *Adria via USRP-users > *Sent:* Dienstag, 25. Juni 2019 15:07 > *To:* [email protected] > *Subject:* [USRP-users] Samples do not get through RFNoC stream splitter > > > > Dear all, > > I am working on an application where I need to transmit a frequency ramp > through two UBX-160 using different carrier frequencies. > > I use a split_stream RFNoC block to copy the samples of a ramp generator > like this: > > [Ramp Generator] ---> [Split Stream] --> Radio 0 > > '-> > Radio 1 > > However, I see no activity on the radio outputs. If I replace the splitter > with, for instance, a DigitalGain block or I remove it, data is transmitted > correctly through any of the two daughterboards. > > Here is how I connect the blocks: > > > > > > * //Connect DDS sweeper to splitter > graph->connect(dds_src_ctrl->get_block_id(), splitter_id); //Connect > splitter to radios graph->connect(splitter_id, 0, radio_ctrl_id_b, 0); > graph->connect(splitter_id, 1, radio_ctrl_id_a, 0);* > > Any help would be appreciated, thanks! > > > > [image: Image removed by sender.] > <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon> > > Virus-free. www.avast.com > <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=link> > > > > _______________________________________________ > USRP-users mailing list > [email protected] > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >
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