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. (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 overflowing. 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
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