[time-nuts] Beginner question - unexpected possible jitter in 1 PPS

[Jason Rabel]

> My question is this: Under what conditions can the
> 1 PPS signal be relied on to meet its period uncertainty
> spec? The UT+ emits 1 PPS regardless of whether 
> satellites are visible or not 

Look under the TRAIM settings. You should have several choices:

1PPS disabled
1PPS always on
1PPS when tracking at least 1 sat
1PPS when TRAIM conditions are met


I would chose the last in the list as that would ensure your PPS is valid.