Dear Rob Thank you for your answer. I make use of the CDA-2990 octoclock as a source of synchronization between both USRPs, in addition to local oscillator sharing. I use dual 10GigEth connections and a MTU of 9000 to connect the USRPs to the PC.
Due to various compatibility issues I am unable to upgrade the system. When I work with a sample rate of 10MSps I don't get problems but when I increase to 25MSps I start to get the error. I need them working with 100MSps. I have tried changing the CPU governor to "performance" to get the maximum working frequency (*sudo cpupower frequency-set --governor performance*), as well as changing the number of network interface descriptors to maximum (*sudo ethtool -G <interface> tx <max> rx <max>*), or increasing the dirty memory buffer (*sudo sysctl -w vm.dirty_ratio=80; sudo sysctl -w vm.dirty_background_ratio=50*), but I still get the same problem. Regards, Anabel El jue, 14 dic 2023 a las 15:38, Rob Kossler (<rkoss...@nd.edu>) escribió: > Hi Anabel, > How are you sync-ing the clocks on the two units? Do you have an external > PPS source and are you configuring both devices to use this external source? > > Finally, do you have the ability to upgrade your OS and your UHD versions? > There aren't many user's that are using UHD 3.12 so if you have issues, it > will be hard to get support. > Rob > > On Thu, Dec 14, 2023 at 5:20 AM Anabel Almodovar < > anabel.almodo...@gmail.com> wrote: > >> Dear all, >> >> I am trying to make an acquisition with two X310 equipped with two >> TwinRx. I am using Ubuntu 16.04 LTS 64-bit and UHD 3.12. My PC contains >> 128GB RAM and an Intel® Xeon(R) Silver 4114 CPU @ 2.20GHz × 40 and a 4TB >> SSD. I have modified the example rx_samples_to_file.cpp code to get 8 >> channels and I get the following error: >> >> *D* >> *[ERROR] [STREAMER] The receive packet handler failed to time-align >> packets. 1002 received packets were processed by the handler. However, a >> timestamp match could not be determined.* >> *Timeout while streaming* >> >> *[ERROR] [X300] 192.168.60.2 <http://192.168.60.2>: x300 fw communication >> failure #1* >> *EnvironmentError: IOError: x300 fw poke32 - reply timed out* >> *[ERROR] [UHD] An unexpected exception was caught in a task loop.The task >> loop will now exit, things may not work.AssertionError: reply.sequence == >> request.sequence* >> * in virtual void >> x300_ctrl_iface_enet::__poke32(uhd::wb_iface::wb_addr_type, uint32_t)* >> * at >> /home/rs3_lab/workarea-uhd/uhd/host/lib/usrp/x300/x300_fw_ctrl.cpp:135* >> >> I don't know how to solve the Timeout problem, I have tried to start the >> acquisition 1.1 sg in time. But it didn't work. >> >> >> * stream_cmd.stream_now = false; stream_cmd.time_spec = >> usrp->get_time_last_pps(0)+1.1;* >> >> What is the problem and how can I fix it? >> >> Regards, >> Anabel >> >> _______________________________________________ >> USRP-users mailing list -- usrp-users@lists.ettus.com >> To unsubscribe send an email to usrp-users-le...@lists.ettus.com >> >
_______________________________________________ USRP-users mailing list -- usrp-users@lists.ettus.com To unsubscribe send an email to usrp-users-le...@lists.ettus.com
