I have a 6683H connected to a PPS source. The PPS has a good long term (> about 1 minute) accuracy (About 20us) but a terrible short term stability (+/-250us).
When I use the 6683 to time stamp a test reference with a very high accuracy (1us) I get jitter in the resulting timestamps from the 6683 which looks about as bad as the incoming short term PPS jitter.
Is there a way to smooth out the 6683 so it adjusts more to the longer term stability of the PPS signal rather than the second by second jitter?
I don't have a better incoming PPS source so I'm looking for a configuration/software approach if one exists.
Thanks,
XL600