LabVIEW
Distorted Data at High Sample Rates using DAQ.mx
I am having issues with LabVIEW gathering data at high sample rates. The goal is to gather output voltages from a resolver sensor of an electric motor. The sensor is excited at 20 kHz and I would like to gather data at 200 kHz. I am using a USB-6363, which claims to have a multichannel aggregate maximum of 1 MSample/s, so 3 channels at 200k shouldn't be an issue.
Below is an image of the distorted data. The graph appears this way regardless of the physical channels I choose.
Below is an image with the white plot invisible. The red plot is closer to how I would expect the data to look but still a little distorted. However, when I switch the wire leads from the motor the red and white plots still distort the same amount, so I know it is not the motor. I have also switched all of my wires, resistors, breadboard, etc. with no luck. I have also tried another USB-6363 DAQ.
Below is the block diagram. Is there something I am doing wrong in my data collection?
Below is an example at 40 kHz. Much closer to what I would expect to see.
Any help or advice would be appreciated, thank you!
