Hello, I have acquired two signals, with a USB 9215A data acquisition board. The signals have 131072 samples each and the sampling frequency was 20kHz, the sampling period was 1/20kHz = 0.00005 seconds. (They are attached). I was trying to calculate the Coherence Function between the two signals. My problem is that I get the error which is presented in the image. As i understand, for a Signal, the dt parameter indicates the sampling period. The error states that the dt for my signals is <=0. How can I fix this???? Is there something wrong with my calculation??

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Coherence Function between 2 Signals using Dual Channel Spectral Measurement

Re: Coherence Function between 2 Signals

JVP

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‎02-28-2011 05:21 PM

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Hi Raul,

I would like to point you towards an NI Tutorials on LabVIEW 2010 MathScript RT Module Known Issues. Please check and see if you are getting issues listed on the Tutorials.

Regards

Jig P

Best Regards,
Jignesh Patel
Principal RF Software Engineer

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