USB6008 output

Hello

I have been asked to draw the output voltage of the USB-6008 vs the entrance of the NOR-9234. The cards are interconnected, so that the NOR-9234 should read exactly what the USB-6008 case sends to.

But there is a strange phenomenon that happens, the NOR-9234 is unable to read the signal under 3.5mV. I don't know where it comes from, you have some ideas?

This could be the USB-6008, or the NI 9234?

On my graph, the white line is the signal I'm sending to the usb-6008 (ideal signal) and the Red corresponds to the entrance of the NOR-9234.

Thank you

Hi Dibbs,

We look at a few things here - the accuracy of the AO of the 6008, the accuracy of the 9234 AI and the use case of the 9234.  The 9234 is a DSA device, so is it is optimized for measurements of acceleration and vibration - not measures of low frequency/DC.  The offset of the 9234 error is 7.1 mV and the absolute accuracy of the OD 6008 is 7 mV, up to 34 mV full scale. One thing to do, you can try using the AI of the 6008 to characterize the AO 6008 or use a device optimized for DC, as a DMM measures.

6008 AO Specs

9234 precision Specs

Tags: NI Hardware

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