On 03/15/2018 08:15 PM, Dang tien Vo-Huu via USRP-users wrote: > Hi all, > Recently I have some doubt about the difference between USRP Sink/Source > and the RFNoC Radio TX/RX. I found the answer in the knowledge > base https://kb.ettus.com/RFNoC but when I tried the RFNoC TX and RX > flow together, it didn't seem to be equivalent to the USRP Sink and > Source together: the RFNoC flow threw many "U" while the USRP > Sink/Source flow ran without any warning. > > The USRP Sink/Source flow graph is very simple, it has 2 flows: > Noise Source --> USRP Sink > USRP Source --> Null Sink > > The RFNoC flow graph: > Noise Source --> RFNoC DmaFIFO --> RFNoC DUC --> RFNoC Radio TX > RFNoC Radio RX --> RFNoC DDC --> Null Sink > > And here is what I received when run RFNoC flow graph: > tienvh@gl502vm:~/workspace/rfnoc/src/rfnoc-tutorial/examples$ > ./rfnoc_tx.py -f 3000M -g 30 -s 20M > [INFO] [UHDlinux; GNU C++ version 5.4.1 20160904; Boost_105800; > UHD_4.0.0.rfnoc-devel-409-gec9138eb] > [INFO] [X300] X300 initialization sequence... > [...] > Press Enter to quit: > UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU > > > I did the comparison by building an image with 2 DDC and 2 DUC so that I > can run both RFNoC flow and legacy flow. I'm using USRP X310 with UBX > and the UHD version is UHD_4.0.0.rfnoc-devel-409-gec9138eb > > Has anyone seen this before or has an intuition on this? > I also attach the flow graphs for more detail.
This is not the expected outcome. Can you run with UHD_LOG_LEVEL=debug and paste it? Maybe the DUC isn't getting programmed correctly. -- M _______________________________________________ USRP-users mailing list [email protected] http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
