Hi Jonathon, Thank you very much for your reply.
What do you want to accomplish? --> Right now, I just want to monitor the 'sample_rx' values. Eventually, I will use this to calibrate the reference input of my custom Verilog decoder (attached) that aims to detect spikes and measure their length (like those from the attachment). It is a short complex int where the upper 16-bits are I and the lower 16-bits are Q. --> Well... that could be the explanation. I will try to monitor them separately and get back to you. Kind regards, Varban On Tue, Feb 25, 2020 at 8:50 PM Jonathon Pendlum <[email protected]> wrote: > Hi Varban, > > I am now getting random 32-bit values when polling it from the UHD >> (instead of a constant that indicates a "zero" reception) > > > Even with the antenna disconnected you can expect some LSBs to toggle due > to inherent receiver noise. > > 1) How should I interpret the 32-variable? >> > > It is a short complex int where the upper 16-bits are I and the lower > 16-bits are Q. > > >> 2) Is the strobe_rx the correct signal that indicates new sample arrival? >> > > Yes > > >> 2) Do I need new_rx_control? > > > No > > Have I done this correctly in general, or there is something completely >> wrong in my approach? > > > What do you want to accomplish? > > Jonathon > > On Mon, Feb 17, 2020 at 5:03 AM Varban Metodiev via USRP-users < > [email protected]> wrote: > >> Dear all, >> >> After exposing the *sample_rx* from radio_legacy.v >> <https://github.com/EttusResearch/uhd/blob/master/fpga/usrp3/lib/radio_200/radio_legacy.v> >> to >> a user defined register and sampling it at rising edge of the *strobe_rx*, >> I am now getting random 32-bit values when polling it from the UHD (instead >> of a constant that indicates a "zero" reception). I am doing this with >> disconnected antenna using a modified rx_samples C++ example application. >> >> I have the following questions: >> 1) How should I interpret the 32-variable? >> 2) Is the strobe_rx the correct signal that indicates new sample arrival? >> 2) Do I need new_rx_control? >> >> Have I done this correctly in general, or there is something completely >> wrong in my approach? >> >> Thanks, >> Varban >> _______________________________________________ >> USRP-users mailing list >> [email protected] >> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >> >
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