How can I capture a hardware trigger (5.76 V, wide 25ns) and allows to trigger something else in LabView

Hello

I'm trying to synchronize data between two different instruments using LabView.

A single instrument will work regardless (it can be integrated with LabVIew for various reasons) and the synchronization signal of this instrument, which I want to use (5.76 square pulse, 25 ns wide V, occurs aperiodically) is "extracted" (I made a breakout box and have the synchronization signal on a coaxial cable that I can plug into anything).

I want to take this synchronization signal and use it to trigger an event in LabView (the second instrument is controlled with LabView).

I had hoped that a USB 6501 would be able to go around, but I realize now that he can't see a signal that is so short (I think).

So, what should I do? How can I make LabView 'see' a such narrow pulse and use it to trigger an event?

In summary:

  • Have digital signals from a piece of hardware on a coaxial cable - 5.76 V rectangular pulse, wide 25ns, occurs randomly nut not more often than every ms
  • Want to get the digital signal into my PC and LabView where I use this signal to trigger an event (in this case, to start an event of data acquisition on a different piece of hardware that is controlled with LabView)
  • I'm using LabView 2013 64 bit, Windows 7 x 64
  • I was hoping to use NI USB 6501, but I'm not sure it's possible, given that the impulse is so narrow
  • Picture of the sync signal as seen on a scope is attached (note there is a tiny little ring that will not present when I fix the cable)

Thank you

Sabrina

Hello

You could use a flip flop to intercept the signal. Do not attach the pulse but the front. You can read the regular output of the scale with any hardware DAQ (digital or analog) and use the same DAQ hardware to reset the flip-flop.

Kees

Tags: NI Hardware

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