Relative min and max of Waveform

[rocksolidsr]

I am wondering if I could get some help trying to capture a waveform measurement in LabView using an analog input.  I attached a picture of the waveform I'm trying to capture and the values I'm trying to read.  Would this type of measurement be possible in LabView

[crossrulz]

What rate is the waveform oscillating?  What rate do you plan to sample at?

As far as measuring those value, it is a matter of finding the right ranges to sample at.  What I have done for something somewhat simlar was to make a moving RMS on the entire waveform.  This should result in something like a square wave.  From there, you can look for the edges.  That will give you the ranges to do your amplitude calculations on the original waveform.

[rocksolidsr]

The main frequency is approx. 20.5kHz and that frequency is modulated at approx. 17Hz.  I am currently sampling at 200k samples/sec

[crossrulz]

Alright.  A standard DAQ card should be able to do that.  If you aren't sure how to use a DAQ card and DAQmx, look in the LabVIEW examples.  Then try the analysis, which I described above.