I had an issue while performing a random vibration test using Test.Lab. I have to use a "maximum" control strategy with 4 pilot accelerometers placed on a fixture in order to avoid overstressing of hardware. If I plot the PSD vs. frequency curve of the control and the 4 pilot accelerometers, I see that the control curve doesn't envelope the 4 pilots as I would expect, but sometimes the pilot PSD's have peaks much higher than the control, even above the "upper abort" level. Why doens't it stop the test? And what is the reason for that? How can I avoid this and get a perfect envelope of the 4 pilots?