negative voltage input and 1409 analog framegrabber

[DanX]

Does anyone know if you can input negative voltages into a PCI-1409 in differential mode? I have a non-inverting amplifier that produces a negative voltage and I want to see if there is a way to use this with the analog framegrabber. I probably can invert the image after it has been acquired with a LUT.

[michaeld]

Dan,

As you can see on the Getting Started with NI PXI/PCI-1409 manual, page 5, the input range for the video input goes from 50 mV to 1.4 V. Is the signal you are creating an actual negative voltage, or are they actually positive signals that are read as a negative differential?