ACQUISITION

[BeatS]

Hello

I'm a beginner with LabVIEW, and I'd like to acquire data and measure the amplitude of the waveform. However, I'm having trouble doing it. Using the attached blocks, I'm not getting the same results as with the oscilloscope. I'm using a Keysight HD304MSO oscilloscope.

The VI and the oscilloscope waveform are attached.

[Bob_Schor]

Welcome to the LabVIEW Forums!  Some things that will help us to help you --

• New LabVIEW Users (a.k.a. "students") most often use the current version of LabVIEW.  The "long-time" LabVIEW Users on the Forum (such as "Knights of NI") will be using older versions of LabVIEW (such as LabVIEW 2021), and hence cannot open any VIs that you attach.
• Pictures of LabVIEW code (such as "ACQUISITION BLOC.png") are not as useful as the actual LabVIEW code -- they are too "static", sometimes are too small, and we can't "play around with them" to test our ideas.
• You can save a VI for a previous version of LabVIEW (see first bullet point) by doing a "Save for Previous Version" on the File option.  You might get "too much extra stuff", but we can help you trim it down to size.
• I hope you've had at least a month of experience learning the basics of LabVIEW.  It would help us to help you if we knew a bit more about your LabVIEW "experience" ...

Bob Schor

[mcduff]

Looking at your two PNGs and making a guess here, you are NOT downloading all of the waveform. I do not have the instrument driver installed, so the VI is of no help to me.

But, in your acquisition you have "50" wired to the Fetch Waveform, and coincidentally, your plot of the waveform has 50 points. So I am guessing that you are not downloading the complete waveform.