Elvis II: FGEN, very fragmented signals low level

We recently purchased some Elvis II platforms: very beautiful products.

In any case, we have a problem with ANY when the amplitude is very small (about 10 ~ 30mVpp) signal (osserved on the scope) is really fragmented.

We use as input AI1 (FGEN <->at the entrance to the quadrupole which is GROUND referenced) ed AI0 (output of the quadrupole, always referenced to GROUND)

We have connected the two pins of AI (-) STILL common then to EARTH, while FGEN transits through the prototype Board.

FGEN share the same GND AI?

Where we are wrong?

Thanks in advance

Hi Parisi,

I think that do you things in the right way. However, it is possible to see a bit of noise (which you see in your screenshot) for a lot of factor. In addition, Elvis II is a very useful and powerful but is not designed to operate small voltage.

You saw the same behavior you acquire a significant voltage signal (more than 1 VP)

Let me know

Tags: NI Products

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