An integrated tool is provided, having a tissue-type sensor, for determining the tissue type at a near zone volume of a tissue surface, and a distance-measuring sensor, for determining the distance to an interface with another tissue type, for confirming an existence of a clean margin of healthy tissue around a malignant tumor, which is being removed, and determining the depth of the clean margin. A peak voltage in the RF generator is also measured. They also involve suppressing a harmonic frequency of a common mode signal presented at the first and second differential input nodes by providing a series resonance from the first and second differential input nodes to a radio frequency ground potential, where the series resonance is selected to pass the harmonic frequency to the radio frequency ground potential.