Making A Single Clean Square Pulse with FGEN

[William.Maier]

When I try to make a single square pulse in LabVIEW using FGEN with the NI PXI-5412, I find that I get a result like the image attached, witch a smaller pulse occurring instantly after the desired pulse.  I am using the VI attached (the upper window is the VI, and the two lower windows are the two VIs used in composing the main VI).  Is there a better way of doing this, one that has a cleaner output?

Thanks.

[NyteFall]

Would you be able to attach your .vi files so I (and anyone else) can get a better look at your code?

I have not worked with the exact function generator you are using so I'm not sure what each of the driver-provided sub-vis do.

Just a thought, would you be able to tell the function generator to send out a square wave at a certain frequency, say 5Hz, then make it stop 1/(2*freq) (.1) seconds later?

This way you would get the first half of a square wave (just the half above 0) which seems like what you are looking for.

[William.Maier]

VIs attached to this post.

Also, I considered something like that, but I'm afraid the timing won't be perfect, but I can give it a try.

[Libbin_la_vida_loca · Accepted solution]

Hi William.Maier

To output a single pulse, use Arbitrary Waveform mode and set the triggering mode to "Single". This will output 1 period of the specified waveform.

I've attached a modified version of the "niFgen Basic Arb Waveform" shipping example that does this.

[William.Maier]

Thanks Libby, that did the trick!

-Billy Maier