I asked something similar on the time-nuts list as I have a cheap navigation receiver that seems to have a 2 us offset compared to a timing receiver: http://www.febo.com/pipermail/time-nuts/2012-December/072358.html
I just got a GPS board with a LEA-6T mdule, I'm using the time mark feature to compare external PPS sources to its internal timebase. Results: Trimble Acutime Gold: ~80 ns early Symmetricom 58534A: ~100 ns late Comparing to a realization of UTC is another thing, see http://www.cnssys.com/files/PTTI/PTTI_2002_CNS_Testbed.pdf http://www.cnssys.com/files/PTTI/Low_cost_GPS-based_time_and_frequency_products.pdf On Wed, Feb 13, 2013 at 9:29 PM, Ralph Aichinger <ra...@pangea.at> wrote: > > 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 _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
