The present invention relates to a signal measurement system (100 200 300) for measuring a signal the system comprising a signal detection unit (41) for detecting a raw signal a signal processing unit (42) and a signal cable (10) electrically connecting the signal detection unit (41) with the signal processing unit (42). The signal cable (10) comprises a signal conductor (1 2) for electrically conducting a first signal from the signal detection unit (41) to the signal processing unit (42) which first signal comprises at least the raw signal a reference conductor (11 12) for detecting and electrically conducting to the signal processing unit (42) only a noise signal induced by a movement of the signal cable (10) or by electromagnetic interference. Fig.2
