Hi Rob, Am 26.02.19 um 15:51 schrieb Rob Heig: > Hi, > > I've bought an Ettus E310 board and I am trying to use it for a MIMO > project, but I am encountering several issues. > > In particular, I have created a GNU Radio design, compiled it as Python > script (as illustrated on the page > https://kb.ettus.com/Streaming_processed_data_from_the_E31x_with_GNU_Radio_and_ZMQ), > > modified it (because it was complaining due to a > TypeError: push_sink_make() takes at most 5 arguments (6 given) > error with the ZMQ sink) and scp'd to the board. > > What I've found is > (1) I cannot set an arbitrary sampling rate (for instance 9.1428M), but > I am required to set e.g. 4M. USRPs, like every hardware, is constraint in terms of available sampling rates. You should stick with power of 2 divides of the master clock rate. Otherwise, the CIC filters on the USRP will corrupt your signal.
> (2) even with small sampling rates (like 2M), and despite a 10MB buffer > in between the USRP source and the ZMQ sink, the system keeps overflowin > > The design I'm using is depicted here: https://ibb.co/GVJxwcm > > - Am I doing anything wrong? > - What is the sampling rate I am supposed to achieve? > > Thanks a lot in advance! > Best, > Rob > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
