Hi David, We would like to debug this off the mailing list. Could you please email us at supp...@ettus.com with the device's serial number?
Regards, Nate Temple On Tue, Sep 4, 2018 at 8:31 AM, David Zamorano Fernández via USRP-users < usrp-users@lists.ettus.com> wrote: > Hi all! > > We have implemented a TDMA receiver using the GPS signal to discipline the > internal clock of the E310 and thus reduce frequency deviations. The > system works fine, but in some cases, frequency drifts appear and the slots > start to be erroneous (wrong CRC). The number of visible satellites has > also been controlled and abruptly goes from a high number (12-13) to a few > (1-2) or even none. > > The GPS antenna is outside. The system has been tested with different > antennas and the behavior has been the same. > > Is there any kind of known bug in the gps daemon related to this? Is > there any other reason why this may be happening? > > I attached an image of a large message capture. You can see how there are > three zones where the frequency drift starts to appear and the slots start > to be erroneous (green circle = ok and red circle = error). > > -- > > > [image: logo_170x100px.png] <http://www.gradiant.org/> > > > > David Zamorano Fernández > Investigador - Desarrollador | Área de Comunicaciones Avanzadas > Researcher - Developer | Advanced Communications Department > > > > Ph. (+34) 986 120 430 Ext. 3012 > dzamor...@gradiant.org <napell...@gradiant.org> | www.gradiant.org > > [image: Iconos Redes Sociales GRD Firma email-01] > <https://www.facebook.com/GradiantNews/> [image: Iconos Redes Sociales > GRD Firma email-02] <https://twitter.com/Gradiant> [image: Iconos Redes > Sociales GRD Firma email-03] > <https://www.linkedin.com/company-beta/769728> [image: Iconos Redes > Sociales GRD Firma email-04] > <https://www.youtube.com/user/ComunicacionGRD> > Take care of the environment. Try not to print this email. > The information contained in this email message may be confidential > information, and may also be the subject of legal professional privilege. > If you are not the intended recipient, any use, interference with, > disclosure or copying of this material is unauthorized and prohibited. > Please inform us immediately and destroy the email. Thank you for your > cooperation. > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > >
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