DSA 4461 FFT on both channels simultaneously

[Rus_K]

Hello. I am using DSA 4461 PCI card and I am trying to power density (FFT) measurements on both channels simultaneously.

I found example from sound and vibration tool kit, but it is only for one channel.

How can I make it to measure 2 channels? Do I need to add one more channel "DAQ-mx create channel" vi in series?

I was not sure how DAQmx REad vi would handle it. I was able to have 2 channels for voltage measurements using Express VI.

Using Labview 8.2

Thank you

[Jake_H · Accepted solution]

I would recommend using channel expansion on your DAQmx task to select multiple channels. When you select the physical channel, choose Browse and a list of all your available channels will populate. Hold down Ctrl and click on different channels to add them all to your task. See the attached photos if you have questions on how to do this. 

You can choose to display this data on a single waveform graph, or you can split the signal and analyze each channel separately. Try this out and see if it works for you.