This is why most folks who are using a shared PPS signal also use a shared 10Mhz reference signal.
Sent from my iPhone > On Jul 2, 2021, at 9:00 AM, Oscar Pablo <oscar_pab...@outlook.com> wrote: > > > HI Marcus, > this timestamp in the metadata is not the accurate timestamp this timestamp > is computed from the the sample count so the accuracy is depend on the > accuracy of the on board crystal. so why i want to know the time of last pps > because usrp do not keep the time sync to PPS. the sync only happen when set > the time of PPS. for example when set next pps time to 0 seconds then after 1 > hour the pps time should be 3600 seconds but for the error of the on board > crystal so the pps time is 3600+-error. so we need to keep to know the time > of pps for long time sync. > > > From: Marcus Müller <marcus.muel...@ettus.com> > Sent: Sunday, May 23, 2021 7:53 PM > To: Oscar Pablo <oscar_pab...@outlook.com>; usrp-users@lists.ettus.com > <USRP-users@lists.ettus.com> > Subject: Re: [USRP-users] how to get time of last pps during streaming > > Hi Oscar, > > > the metadata contains a timestamp. That's literally a timestamp – If you know > the time at > *any* PPS, for example because you set it, then you can directly infer the > time at the > last PPS from the timestamp. > > However, usually people care about the time of a sample, not the time at the > last PPS. > > > Best regards, > > Marcus > > On 23.05.21 04:36, Oscar Pablo wrote: > > Hi, > > i want to know the time of each pps during rx streaming. i don't know if i > > call > > get_time_last_pps will cause the overload? is there a way to let uhd put > > time of last > > pps in the meta data of the received data? > > > > _______________________________________________ > > 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
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