On 08/09/2018 02:31 PM, Rob Kossler via USRP-users wrote: > When I first started using MPM 3.13, I was pleased to see the fast > initialization times compared to previous versions. Now, after spending > the better part of a couple of days troubleshooting issues, I am much > less thrilled with this version. > > The two attachments show the resulting spectrum from an external Tx->Rx > RF loopback experiment. The only difference between the two figures is > the change of MPM from 3.12 to 3.13. The baseband signal consists of 100 > equal amplitude tones equally spaced over 80% of the sampling freq > (31.25e6, in my case). Note that the 3.12 results are as expected. The > 3.13 results show energy over the full bandwidth and significant > variations in tone magnitude. I confirmed with a spectrum analyzer that > the trouble was on the Tx side rather than Rx. > > I also experienced issues with streaming timeouts occurring on the 2nd > time I issued a streaming command. However, with all of the variations > I have been going through while troubleshooting this issue, I cannot say > for certain that this secondary issue is related to the MPM version. > Presently, I am not seeing these streaming timeouts and I'm not sure of > the exact conditions that caused them.
Rob, as Michael West already mentioned, we're checking out these issues and trying to reproduce. In the meantime, you could try running with force_reinit=1 as a device arg to force clean-slate initialization (the way we improved the init time was by skipping certain steps). It'll make your init times slow again, of course. -- M _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
