Hi, I am quite new to LabVIEW but I have a complicated program to create. Part of this requires a waveform to be generated from a spreadsheet of parameters, attached. I have attached a graph of how the waveform looks. As you can see the various parameters relate to durations and amplitudes of the wave as well as the frequency and amplitude of the sine wave in the middle. In addition to this the program must cycle through creating each waveform in succession as the values in the spreadsheet change for each different test. I have managed to read the spreadsheet file, make an array from this and then i tried to index the array by row to send to a for loop which would run through each test but I don't know how to create the waveform from these values. I attempted to utilise the labView waveform generators to create individual sections of the wave but struggled. Thanks for any help.

Combine Gerd and my suggestions. I had not used the Signal Generation Palette VIs before, but they do handle most of the "math" for you. The key step you need to decide is what interval to use for "dt", the time "quantum", usually the same as the sampling interval. Looking at your Waveform picture, you have a Pulse, a Ramp, a series of Sinusoids, another Ramp, and a final Pulse. When you look at an individual Palette, it has "dimensionless" parameters that you need to adjust for your particular situation. Consider the ramp that has duration T3, starts at V1, and ends at V3. Assume your sampling interval is "dt". You would wire the Samples, End, and Start inputs to the Ramp Pattern by Samples function as follows: samples = T3 / dt end = V3 start = V1 Since you will be continuing from where you left off, I would think you would want to wire "exclude end?" to True (to avoid double points), but I might be wrong about this. For the sinusoid, you need samples, amplitude, phase, and cycles. Samples is again the total duration of the sinusoid divided by dt. The amplitude is A, the phase is 180 (notice that your sinusoid starts negative), and cycles is however many cycles you want during the duration of the sinusoid. This sinusoid, however, will be around 0, so you'll need to add the constant offset V3 to the array. Once you have assembled all of the parts of this complex waveform and have concatenated the resultant arrays, all that remains is to turn them into a proper Waveform. Drop a Build Waveform function on the Block Diagram, drag up its top edge one "click" to expose dt, and wire in dt and your array (to Y). You now have a proper waveform. Bob Schor

LabVIEW

Create custom waveform using spreadsheet of parameters.

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I have solved the issue... FYI I was not dividing the width and delay by dt before inputing to the generator.

Thank you both very much for your help!

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Create custom waveform using spreadsheet of parameters.

Re: Create custom waveform using spreadsheet of parameters.