I need to connect a differential analog input to a USB-6218 (BNC) DAQ device. For differential measurements, AI 0 and AI 8 are the positive and negative inputs of differential analog input channel 0. The device has a BNC connectors for AI0-7 and AI16-23. When I configure differential inputs, is the BNC shield of AI0 actually AI08 on the USB box or will I have to wire an AI08 to one of the PFI's?
Thanks,
