Fun with TE today:
Compare Jitter of two OCXO. Yesterday, to compare results with DMTD,
Cycle-to-Cycle phase difference between two OCXO was plotted on scope:
Now that does not look right, jitter should be random not periodic
Because this is a comparison measurement, how to be sure,
what to make of it, maybe even a sampling artifact? Today it dawned on me:
Now with third OCXO, one can do another comparison and figure out the culprit!
Now that looks more like expected!
Culprit is found in either OCXO or it's surrounding circuit
Now to dig there further
Edit: Also, I want to add that this specific function - to plot a
measured value as a trace -
is what makes a "professional grade" DSO for me. You sure do not need it often,
but IF it's a godsend...