I am using the Transition Measurement VI to measure Rise,Fall, Overshoot and Undershoot of a digital signal. The VI returns the overshoot and undershoot in percent format but I need to convert it to a voltage format. Does anyone know how to do this?
According to the LabVIEW help on this vi, there are two formatting options for the reference levels: percentage (default) or absolute units. To select absolute units, change the ref units option of the reference levels input cluster to absolute.
I understand sort of. I changed to absolute and set my high ref to 6.3 Vlts then my mid ref to 3.5 and the low ref to .640 and I don't get an error anymore but the problem is in the post transition cluster the undershoot looks like its still in the peercent mode. It doesn't change even if I am in the absolute mode. I need to convert that percentage to a voltage level.
The algorithm called by the llb governing the transition measurements vi only returns the overshoot/undershoot as a percentage (as you have found). To overcome this, you can multiply the percentage by the high state level or low state level output of the amplitude and levels vi to obtain an absolute voltage representation of the overshoot/undershoot.
