The TDR-420 reflectometer is a handy digital Time Domain Reflectometer (TDR) designed to characterize and locate faults in power and telecommunications cables. The Sonel TDR-420 reflectometer allows to measure the length of the cable and to determine the distance to the damage or impedance change in the range from 4 to 6000 m in cables with metal conductors. The shortest measuring range of 7 meters and the dead zone of 0.6 m allows user to locate a damage in a very short distance from the connection point of the device. Features Fault location in power and telecommunication cables Two independent cursors to indicate two fault locations and the distance between them Fault location in coaxial cables Fault location in infrastructure cables Detection of breaks, short-circuits, damage caused by moisture and other changes in cable impedance Graphic presentation of cable faults with an indication of the distance to the fault on the display