Terje Mathisen <"terje.mathisen at tmsw.no"> wrote: > Unless you replace the motherboard clock source, anything below ~us > precision is wasted.
Good to know. So basically the 1 or 2µs jitter I get after everything has had time to settle down is the maximum archievable unless you use rather exotic hardware. > I have seen reports that the original Motorola Oncore UT+ had something > like 30 ns RMS jitter (after applying the sw saw-tooth correction), > while the $35 Sure board has been tested by one of the time-nuts people > at ~25 ns? That is great, so basically jitter is a non-issue compared to standard computer hardware, and I am pleasantly surprised that the Sure board is that good. Has anybody checked the PPS output for constant shift against UTC? Is it possible that the pulses are off with a constant offset, even if they have very little jitter? Or is this unlikely from what happens inside the receiver? /ralph -- I am waiting for the first tutorial how to build a rubidium-disciplined Raspberry Pi ;) _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions