Hi Guys, I am using N210 with SBX at 5M sampling rate. I have one USRP Source running continuously (connected to the TX/RX antenna), and a USRP Sink (connected also to TX/RX) that sends timed packets with the tx_time, tx_sob, tx_eob tags at a rate of 1 ms per packet. I am sending packets 10 ms prior to the USRP Sink and I use the sample counter of the USRP Source to monitor the time on the FPGA.
After some time I am observing timing errors (L) that I cannot explain. The only possible explanation would be a sampling glitch in the RX path when switching between TX and RX. That is, it seems that a few samples are lost in the RX path when the switch is made, and therefore the FPGA time and the number of samples received are diverging over time (by a small amount for each switch). I do not observe this behavior at 500K sampling rate, there no RX samples seem to be lost. There are no underruns/overruns prior to the lots of L's. Any ideas why this is happening and whether it can be prevented somehow? Miklos _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
