Hi, If you use SSDs, you are even faster than hard disks:) RXLO is part of your UBX spec. I don't have one:( It seems that it has to do something with locking your GPS positions... A reader lock would be a lock on your reading, and could explain your "D"s, dropped samples, when you use it. That "RX" on the "RXLO" looks suspicious, but from your saying is just a lock on the receiver location... Could it be that until your N210 locks to a location, it receives samples, and therefore drops them? I don't know much about your configuration, so I better let someone else with more knowledge about it, answer.
BR Nikos On Thu, Jul 14, 2022 at 4:46 PM Katarina Radoš <kra...@fesb.hr> wrote: > > Hi Nikos, > > thank you for your response. > We don't have HDD and we only have SSD on our laptop. > Is it necessary to have hard disk in order to run this? > > Regarding the locks, could you explain us what reader locking is exactly? > > Best regards, > Katarina and Marta > ________________________________ > From: Nikos Balkanas <nbalka...@gmail.com> > Sent: Thursday, July 14, 2022 1:37 PM > To: Marta Brkić <marta.brkic...@fesb.hr> > Cc: usrp-users@lists.ettus.com <usrp-users@lists.ettus.com>; > usrp-users-requ...@lists.ettus.com <usrp-users-requ...@lists.ettus.com>; > Katarina Radoš <kra...@fesb.hr> > Subject: Re: [USRP-users] Help with collecting GNSS signals by using GNSS-SDR > and USRP N210 > > ...or your locks. Are you locking your reader? > What exactly are you locking? > > Nikos > > On Thu, Jul 14, 2022 at 4:28 PM Nikos Balkanas <nbalka...@gmail.com> wrote: > > > > Hi, > > > > To set thread priority, you need to add your user to group usrp... > > "D" means dropped packages. You are not reading fast enough. > > Since your last run was also at 4 Mhz without any "D"s, it seems your > > problem is with your hard disk I/O... > > > > HTH > > Nikos > > > > On Wed, Jul 13, 2022 at 1:39 PM Marta Brkić <marta.brkic...@fesb.hr> wrote: > > > > > > Hi, > > > > > > we have problem with collecting GNSS signals for GNSS spoofing by using > > > USRP N210 (daughterboard UBX-40), active GNSS antenna > > > (GPSGlonass-36-N-GA) and GNSS-SDR. > > > Firstly, we followed all steps from GNSS-SDR configuration page and we > > > successfully got the position fixes with downloaded file of raw signal > > > samples as at the link. > > > Afterwards, we tried to get the position fixes with active GNSS antenna > > > but unsuccessfully. We set all the parameters as at the instructions at > > > the link and ran 'my_GPS_receiver.conf' file. As the result, we got > > > printed 'D' (please see screenshots 1 and 2 attached). We tried to solve > > > this problem by following the instructions at ETTUS page but nothing > > > worked in our case. > > > > > > Then, we tried to set the sampling frequency to 2MHz and there was no > > > printed 'D' after running the conf file. However, we didn't get the > > > position fixes and we only got 'Loss of lock in channel' (screenshot 3). > > > We searched for the solution and we wonder if missed something or we do > > > not have all necessary equipment (we saw that bias-tee is needed for some > > > daughterboards). > > > > > > We would be thankful if you could help us with our problem. > > > > > > Thank you in advance and best regards, > > > Katarina Radoš and Marta Brkić > > > > > > _______________________________________________ > > > USRP-users mailing list -- usrp-users@lists.ettus.com > > > To unsubscribe send an email to usrp-users-le...@lists.ettus.com _______________________________________________ USRP-users mailing list -- usrp-users@lists.ettus.com To unsubscribe send an email to usrp-users-le...@lists.ettus.com
