Patent ID: 8836320

Claim:
An apparatus for decoupling a radio-frequency signal transmitted on a data transmission line having a first line element and a second line element, or for decoupling interference voltages, the apparatus comprising: a tapping module, connected to the first and second line elements at a first tapping location of the data transmission line, for decoupling the radio-frequency signal or interference voltages; a current probe module, coupled to the first line element at a second tapping location of the data transmission line; and an output terminal connected to a device, wherein the output terminal exhibits an output impedance; wherein the apparatus is capable of matching the magnitude of output impedance to an input impedance exhibited by the device; wherein the tapping module is a sensing head having a first tapping element and a second tapping element; and wherein the apparatus further comprises a changeover switch configured to effect a circuitry interchange of the tapping elements of the tapping module.