Hal Murray via devel writes: >> PPS line discipline via USB virtual serial works and produces the expected >> ~1ms offsets due to the USB poll interval. It should be possible to remove >> that shift by doing a loopback measurement via RTS/CTS eventually. Jitter >> is roughly on par with the local stratum-1 over network. > > The USB polling interval is roughly 1 ms so I'd expect 1 ms peak offset, 1/2 > ms if you average over enough samples.
It wasn't the polling interval as I just wrote in an update. > Do you know about hanging bridges? It's what you get when your sampling > clock beats against the clock behind the data source. Averaging works if the > clocks are not in sync. If the clocks are close to in-sync, then the offset > changes slowly so a batch of samples will get mostly the same offset. Yes I know. Btw, can you perhaps not break threading all the time when you answer to the list? Regards, Achim. -- +<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+ Wavetables for the Terratec KOMPLEXER: http://Synth.Stromeko.net/Downloads.html#KomplexerWaves _______________________________________________ devel mailing list devel@ntpsec.org http://lists.ntpsec.org/mailman/listinfo/devel
