Problem with LenearX

Hi,

I have not used the system for a long time, so it happened a couple of days ago, I had to take measurements, and the LinearX system gives an error when measuring the impedance.

Impedance.jpeg

I tried to solve the problem by reinstalling Windows 7, but it did not help. I tried to do internal and external calibration, it also does not help.

Sometimes the system fails internal calibration:

VCA Offset Test (Problem).jpeg

Highlighted in red the item that the system sometimes does not pass.

Thanks in advance for your help.