How to use Transition Measurement vi

[SuperFastSquirrel]

I was successfully using the Transition Measurement vi in LabVIEW 20 with no issues until my data input started at a high point rather than a low one. How can I use this vi to acquire the precise location of the rising edge shown here? I tried adjusting my reference values but could not get that to work.

 

[NIquist]

It looks like you just left all your ref levels at the default which is low = 10% and high = 90%.  Change them to something WITHIN your waveform.  You could try staying with percentage and lowering the range to 70% and 30%.  Or, switch to absolute at 0.8 and 0.2.

Check out the example Pulse and Transition Measurements to play around with these parameters...

Edit:  I did see that you tried changing the refs, but you didn't say how.  Absolute and percentage make a BIG difference.  If you change the example to a high level of 100% you will throw the same error you are seeing.  You need to tweak the parms until you get your desired result.

[Minions]

Could you capture the waveform using the negative trigger such that it moves to a point below your 10% range?  This way the waveform would always start at the low end then transition high.