The voltage generation technology invented in 1990 and patented in 1995 by BAUR is currently the only meaningful basis for all types of measurements on earth cables. It enables the least destructive cable testing and condition evaluation of medium-voltage cables in compliance with VDE, IEC and IEEE. Only the truesinus® technology provides a precise basis for significant and reproducible cable tests or condition evaluations with tan delta or partial discharge measurements. And this even for simultaneous measurements, e.g. with MWT or full MWT.