Hi Marcus, It's a B210. So you confirm this is strange, and is probably a problem on the Soapy part?
I can try to write the same straight in UHD to see what I get. Thanks. On Tue, Jul 24, 2018 at 10:00 AM Marcus D. Leech via USRP-users < usrp-users@lists.ettus.com> wrote: > On 07/23/2018 09:51 PM, RizThon via USRP-users wrote: > > Hi all, > > I have a question concerning the timestamps while getting an overrun. > > I'm sampling at 28MS/s and reading blocks of 1024 samples. So it takes 36571 > to 36572ns to sample each block. > > I try to read x blocks, calling receive for each block. I get something > like > > block 93: correctly read 1024 samples, timestamp as expected (ie +36571ns > compared to block 92) > block 94: only received 364 samples, timestamp still as expected > block 95: overrun, timestamp is bigger than expected (+94286) > block 96: correctly read 1024 samples, but timestamp is lower than block > 95 (-81286) > block 97: correctly read 1024 samples, timestamp as expected > block 98: correctly read 1024 samples, timestamp as expected > block 99: correctly read 1024 samples, but timestamp is bigger than > expected (+2818750) > > The exact same pattern repeats itself from time to time > block n: receive fewer than expected samples > block n+1: overrun with timestamp jump > block n+2: get timestamp smaller by always 81285 or 81286 > block n+3: ok > block n+4: ok > block n+5: big timestamp jump > > Can someone explain what is happening, and what the proper way to handle > overruns is? > > I'm using SoapySDR, so I don't know if it's specific to UHD or if there's > some bug in Soapy (I'm not seeing that behaviour with the same program > running a LimeSDR). > > Thanks. > > > What type of USRP is this from? > > There aren't too many people on this list who can help debug SOAPYSDR > stuff, so debugging it might require doing a "throw away" purely using > the UHD API, to see if the problem persists there. > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >
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