frequency trigger

[lacherb]

Hey,

I am running a frequency sweep from a wave generator and I would like to create a trigger that will trigger when the wave generator hits a specific frequency.  I am wondering if there is a way to preform this.  Thanks.

[AllanS]

Hello Lacherb!

What hardware are you using for this application?  What version of LabVIEW?  Are you using an FPGA or Embedded system?  Let me know and have a great day!

Allan S.

National Instruments

[lacherb]

Allen,

Hey,  I am using Labview version 7.1 and Labview realtime, hooked up to a PXI-8176 embedded processor.  I am using a 6052E Board.  Hope that can answer your question.  Thanks.

-Brett

[AllanS]

Hello Brett!

Well first the frequency you trigger on will have to be a pretty low frequency because the MAX sampling rate of the 6052 is 333Ks/s.  Next it would have to be a software trigger because you would have to acquire the waveform then do an FFT on it and determine whether it was within the band you have determined you were going to trigger on.

Beyond this using our analog input examples and signal processing examples you should be able to peice togeather a program that does this.  I believe that you main bottle neck is going to be the sampling rate on the 6052E.  Let me know if you need more specifics. Have a great day!

Allan S.

National Instruments

[lacherb]

Thanks for the help.  I appreciate it.

-Brett