When I set an FPGA I/O pin high, the voltage goes high then decays

[SE1W]

Using the Front Panel of my LabVIEW FPGA program, I change an FPGA I/O pin from low to high.  I look at the signal on a scope and find that the output momentarily goes high and then decays.  I can't figure out why its not staying high.  The block diagram below.

Software Version: LabVIEW FPGA Module 2016

Hardware: NI PXIe-7020R

[AnalogKid2DigitalMan · Accepted solution]

Is your scope input set to AC coupling? That might explain the behaviour you see.

Not sure about the code since I do not do FPGA.

-AK2DM