ground wire 108 does not interfere with the operation of the measurement device 102 fig2 is circuit diagram of probe in accordance with the preferred embodiment of the present invention it will be appreciated by those of ordinary skill in the relevant arts that the circuit 200 as illustrated in fig2 and the operation thereof as described hereinafter is intended to be generally representative such systems and that any particular system may differ significantly from that shown in fig2 particularly in the details of construction and operation of such system as such the circuit 200 is to be regarded as illustrative and exemplary and not limiting as regards the invention described herein or the claims attached hereto the circuit 200 generally comprises a measuring device 202 connected to a dut 204 by a probe 206 in accordance with the preferred embodiment of the present invention the measuring device 102 may be an oscilloscope such as an agilent infiniium the dut 204 could comprise any number of devices including pc mother boards high speed digital circuits cellular phone circuits etc the probe 206 comprises a probe tip 208 a cable 210 and an electronics pod 212 the measurement device 202 is connected to the dut 204 via a signal wire 214 and a ground wire 216 in the probe 206 an additional wire 218 carrying very low current is provided between the measurement device 202 and the dut 204 those of.