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USB DAQ performance?


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I need to continuously sample one analog voltage at 1.25 megasamples/second, 16 bits. I'm considering the NI PCI-6251 card in a desktop computer vs. a USB-6251 BNC with a notebook computer. My question is, are there any issues with the USB version keeping up with continuous sampling and data moving at that rate robustly? And are there any issues or problems at all with using the USB product instead of the PCI card product?

Thank you very much for your advice on this!

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True, the specs seem to point out that the device should work fine in terms of speed, but I've heard from others that sometimes in long term tests, MAX or the software appears to "lose track" of the device somehow, and the only way to bring it back is to unplug and replug the device back.

Just to be safe, I would use a PCI device for a neater solution (no external power brick required).

N.

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  • 3 months later...

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