I am running a PXIe-7971R FPGA in a PXIe-1073 chassis with the 5782 Adapter Module (DC-coupled) and the 2016.08 Device Drivers. When I turn on the chassis and my computer, nothing odd happens. When I try to run something on the FPGA, however, things get weird. Every piece of the code works just as it should, but as soon as "FPGA Open Reference" finishes running the adapter starts producing a +250 mV voltage at AI 0 and AI 1. This does not happen for AO 0 or AO 1. This voltage offset goes away temporarily for as long as "FPGA Open Reference" or "FPGA Close Reference" are running, but the only way to get rid of the voltage offset entirely is to restart the chassis. Can someone explain to me why this is happening and how to fix it? The FPGA code I'm running can handle a small offset, but this offset appears to be saturating the signal.
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