The apparatus, the hand a portable testing device and method for coupling of electrical signals in lines or cables for locating purposes

摘要

Apparatus for coupling of electrical signals in lines or cables for test purposes, comprising– Means (1) for generating an electrical signal by modulating a relatively higher frequency signal with a relatively low frequency signal, and– Means for coupling the signal into an end of a line,characterized in that– the einkopplungsmittel a plurality of outputs of the device for the coupling of the signal in a corresponding plurality of lines.