Hello everyone, I unsuccessfully try to use the FIR Filter RFNoC block in reception, in an USRP X310 with a UBX-160 daughterboard on-board. I have tested several topology for the custom image (radio0 - > ddc0 -> fir0 -> ep0 || radio0 -> ddc0 -> ep0 + ep1 -> fir0 + fir0 -> ep1, for example), with several parameter for the filter (With or without re-loadable coefficients, with or without embedded DSP registers, 21 coef' instead of 41 ...) but it ultimately always fails the same way. When the FIR is used, I can't retrieve any data. I got an Overflow error, without receiving any samples. Sometimes, I even got a "Late Command" error, even when using RFNoC in C++ (graph committed immediately before the stream now stream_cmd).
For the record, the center frequency is 433 MHz for a sampling rate of 1 Msps. I assumed the filter output one complex sample (sc16) for each new input (sc16 too). Am I wrong? Or is there specific setup I have forgotten? Has someone successfully used this block, and can provide an example or tutorial? Regards, Camille _______________________________________________ USRP-users mailing list -- usrp-users@lists.ettus.com To unsubscribe send an email to usrp-users-le...@lists.ettus.com
