(please discard the just previous post, i had made) I tried your suggestion Marcus. I don't find any peak with the GnuRadio, when I construct a flow graph and stop the flow-graph. But when I do run my tx script and even after python returns call to the system, the uhd_fft.py keeps getting the peak at centre frequency, that means the tx USRP keeps on sending the data, for a loong time.. Please HELP !
Uzair Baig Marcus D. Leech wrote: > >> I have two USRP1 (each connected to a laptop), separated 30cm apart. Each >> have a single Antenna connected to RFX2400 daughter card. I am running >> Ubuntu LTS version. I downloaded GnuRadio+UHD from your (Marcus Leech) >> script 2 months ago. >> Below are the details of my GnuRadio version: >> MAJOR_VERSION=3 >> API_COMPAT=4 >> MINOR_VERSION=2 >> MAINT_VERSION=git >> Now I am not sure how to find the information of my UHD drivers. (I >> installed using your script, with no other changes, so it will be exactly >> the same, as in the script). I am sending some samples (all zeros or >> ones, >> using a vector source) to a UHD sink. The data does get sent, and >> received >> not once, but more than once, in the UHD source (connected to the other >> laptop). And even after my code stops, and I try to capture data again, >> using the UHD source, I get similar data, until after a 3-4 minutes later >> (when its just noise again) or I have switched off the power supply of my >> USRP1 that is a UHD sink. >> >> My flow graph is pretty simple. UHD sink is in the tx.py file ( >> http://old.nabble.com/file/p33045005/tx.py tx.py ), and UHD source in the >> rx.py ( http://old.nabble.com/file/p33045005/rx.py rx.py ) file. I am >> attaching those. To make sure I get all the samples, I run the rx.py file >> for many symbols (as compared to the number of symbols being sent). >> >> Yes, right now, I am just using my vector sources and sinks for initial >> testing to get an idea, I plan to shift to a file source. >> > >> UB >> > OK, so heres an idea. Rather than having people here debugging your > code, why don't you try a very simple experiment. > > On the TX side, construct a simple flow-graph that emits a single tone > at your chosen frequency--you should be able to whip that > up in GRC in about 30 seconds. > > On the RX side, use uhd_fft.py to observe that tone. > > Then, stop the TX side. Do you still see the tone? > > > > > -- > Marcus Leech > Principal Investigator > Shirleys Bay Radio Astronomy Consortium > http://www.sbrac.org > > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > -- View this message in context: http://old.nabble.com/UHD-source-%28data-keeps-being-sent%29-tp33044146p33114908.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
