Hi,
I am getting lots of underflow errors when sending with gnuradio to an X310 at sampling rates of 50 MSps and higher. The flowchart is as simple as possible: a signal source and a "UHD: USRP Sink" block. When sending and receiving at the same time, the performance is even worse. The X310 is connected to the PC by 10G ethernet. Using the UHD example programs benchmark_rate, tx_waveforms, txrx_loopback_to_file etc., a sampling rate of 200 MSps full duplex is no problem at all. So it is not a problem of the UHD driver and the network setup should be OK as well. The processor is an Intel core i3-7100 @3.9GHz. A gnuradio flowchart with a signal source, a throttle block and a file sink works at 50 MSps sampling rate and more, so the processor speed should not be a problem either. The gnuradio version is 3.7.11 which is the one currently distributed for Ubuntu buster. Any ideas? Could an update to a more recent gnuradio version help? Best regards, Erik
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