Stromeko at nexgo.de
Tue Jan 30 21:06:00 UTC 2018
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
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+
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