DTT is once again not ramping down excitations. The exciting new "feature" here is that it's not just upon an Abort. Even when the measurement completes fully, it still just immediately stops the excitation.
This has caused 1 lockloss so far tonight, and 2 scary glitches that could have been locklosses.
I attach my DTT settings - Noise (Gauss), and I do have a ramp up/down times defined.
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Looking at it again (still running measurements, just hoping for the best when they complete), it looks like it waits and leaves the excitation on for the number of seconds set in the RampDown box, and then cuts it off. So, the excitation doesn't get suddenly cut off as soon as I click Abort, it gets suddenly cut off 3 seconds after I click Abort.
Your excitation contains a filter that rings like a bell long after the input has been cut off. Since the excitation and filter are implemented in the AWG on the front end, there's nothing DTT can really do about this, other than hold the excitation test point open until the program quits. The ramp down applies to the input to the filter, not the output.
Step response of filter for excitation, 500 seconds.
