Hi Ernest, to be honest, yes, you probably could do that post-processing in GNU Radio, but it's offline processing and might be a lot easier to do just e.g. in python with numpy/scipy.
> I also plan for NTP. But how do I simultaneously trigger recording > with it. I don't know the HackRF interface very well, but I'd imagine it has some sort of "start" method or just a "first call to gimmesamples()". I'm afraid others will have to jump in here! Best regards, Marcus On 25.08.2016 08:19, Ernest Matey wrote: > Hi All, > > Sorry I replied on my other Post ( Nanoseconds). That was not intended. > > Thank you for the reply. > To line up the 3 recordings with the timestamps will be a post > processing I guess on GNUradio?? > > I also plan for NTP. But how do I simultaneously trigger recording > with it. > > Ernest > > > On Thu, Aug 25, 2016 at 3:10 PM, Marcus Müller > <marcus.muel...@ettus.com <mailto:marcus.muel...@ettus.com>> wrote: > > Hi Ernest, > > > On 25.08.2016 07 <tel:25.08.2016%2007>:07, Ernest Matey wrote: > > It is critical for me to start the recording simultaneously and > > synchronized to more than 100ms accuracy between the stations. > > > 100ms is a whole different story than nanoseconds in your other post; > You could probably achieve this 0.1s accuracy by coordinating computer > clocks (NTP, PTP) and then triggering recording with those. > > Anyway, since your hardware, as far as I know, doesn't allow for > timing > control itself, doing exactly what Kevin recommended sounds clever: > you've inserted PPS signals in your sample stream, so use the very > rough > PC-clock-aligned sampling start to give your "roughly aligned" > streams, > and extract the PPS information from your recordings later on to > fine-align. > > Best regards, > Marcus > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org <mailto:Discuss-gnuradio@gnu.org> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > <https://lists.gnu.org/mailman/listinfo/discuss-gnuradio> > > > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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