Hi Alex, that's the right (and only) approach: Metadata contains the time stamp for the first sample in a packet; the rest is counting!
Best regards, Marcus DISCLAIMER: Any attached Code is provided As Is. It has not been tested or validated as a product, for use in a deployed application or system, or for use in hazardous environments. You assume all risks for use of the Code. Use of the Code is subject to terms of the licenses to the UHD or RFNoC code with which the Code is used. Standard licenses to UHD and RFNoC can be found at https://www.ettus.com/sdr-software/licenses/. NI will only perform services based on its understanding and condition that the goods or services (i) are not for the use in the production or development of any item produced, purchased, or ordered by any entity with a footnote 1 designation in the license requirement column of Supplement No. 4 to Part 744, U.S. Export Administration Regulations and (ii) such a company is not a party to the transaction. If our understanding is incorrect, please notify us immediately because a specific authorization may be required from the U.S. Commerce Department before the transaction may proceed further. On 22.06.21 00:24, Alex Bouvy via USRP-users wrote: > > Hello, > > > > In the paper below, the authors say that they have set up their USRP device > to include > timestamps for each recorded sample, but do not provide detail on how this > was achieved: > > > > https://ieeexplore.ieee.org/document/6533293 > <https://ieeexplore.ieee.org/document/6533293> > > > > I have been looking into what is required to achieve something similar. > Particularly, I > have been working with the source code of the rx_timed_samples.cpp example > provided in > the UHD files, along with this page in the Ettus manual: > > > > https://files.ettus.com/manual/page_sync.html > <https://files.ettus.com/manual/page_sync.html> > > > > Looking through the rx_timed_samples code, it appears that the metadata > associated with > the recv(..) function contains a time_spec field which is the timestamp for > the first > sample in the IO stream, but it’s not immediately clear to me how that might > be used to > timestamp all of the samples, which makes me think this may be the wrong > approach. Is > there a simpler method to do this that is known? > > > > Tangentially, I’ve also looked into adding the timestamps through GNURadio, > but there > does not appear to be a way to do this as far as I can tell. > > > > Any help is much appreciated. > > > > Thank you, > > Alex > > > _______________________________________________ > 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
