The integrity of the triaxial extension cable is very important to have a valuable signal.
Even some modification that seems trivial can have an impact. For example : altering the grounding cable.
Here, a unaltered grounding cable connected to the LIN :
In the following picture, a new crimped grounding lug was added after the original grounding wire was cut (see clear heat shrink)
In all cases, communicate with VibroSystM to find out what you can do if you are facing problematic situations.