[time-nuts] KS problem

[Bob Stewart]

I've been uncomfortable with this KS since I got it; even having to return the REF-0 unit for comms problems.  Now that I have the PRS45A, I think I've proved that the KS does have a problem.  Has anyone else had something like this plot shows?  Any idea what's causing it?  I'm not seeing anything like this on my home-grown unit, but that uses an LEA-6T instead of a UT+.
This plot is the phase difference between the 10MHz from the KS vs the 10MHz from the PRS45A.  The 1PPS from my homegrown unit is being used to trigger the 5335A which is measuring the time interval.  I could switch the trigger to the KS, but I don't think that would change anything, since it's the phase between two 10MHz signals that's being measured.  Or do I misunderstand how the 5335A triggering works for TI measurements?  I can post the setup commands for the HPIB if wanted, or even my somewhat convoluted logging program.

http://evoria.net/AE6RV/KS/fll.png

Bob - AE6RV