Thanks, Jean-Michel.
Sent from my iPhone > On Nov 6, 2020, at 1:24 PM, jeanmichel.fri...@femto-st.fr wrote: > > I was waiting to confirm measurements: > * I confirm libuhd 3.15 running the X310 will NOT display the same effect > * I confirm libuhd 4 DOES display the same effect on the B210. > > I can provide the charts which I did not upload on the gnss-sdr github issue > as demonstration of these measurements. > > Thanks, JM > > -- > JM Friedt, FEMTO-ST Time & Frequency, 26 rue de l'Epitaphe, 25000 Besancon, > France > > November 6, 2020 7:18 PM, "Marcus D Leech" <patchvonbr...@gmail.com> wrote: > >> Do you see the same thing on other platforms? What about newer/older UHD >> versions? >> >> Sent from my iPhone >> >>>> On Nov 6, 2020, at 5:29 AM, JM Friedt via USRP-users >>>> <usrp-users@lists.ettus.com> wrote: >>> >>> While analyzing GPS timing capabilities of gnss-sdr as described at >>> https://github.com/gnss-sdr/gnss-sdr/issues/442 >>> we have become convinced that the B210 transferring data using libuhd 3.15 >>> drops one samples every 2^32 (i.e one sample every 4294967296). This >>> conclusion >>> was reached by changing the sampling rate and observing that the time shift >>> in >>> the GPS timing capability was jumping by one sample period every 4294967296 >>> acquisitions (i.e. 36 minutes at 2 MS/s or 57 minutes at 1.25 MS/s). This >>> issue >>> is NOT observed with an X310 streaming data to the same libuhd source. >>> We have no idea how to address or solve the problem, but any hint at how to >>> correct >>> the issue would be welcome. >>> >>> Thank you, Jean-Michel >>> >>> [1] running on a Raspberry Pi4 with a 64-bit kernel and 64-bit >>> libraries/toolchain compiled >>> with Buildroot >>> >>> -- >>> JM Friedt, FEMTO-ST Time & Frequency, 26 rue de l'Epitaphe, 25000 Besancon, >>> France >>> >>> _______________________________________________ >>> USRP-users mailing list >>> USRP-users@lists.ettus.com >>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
