Because of the extreme complexity of the power cable laying environment, the precise fixed point has always been a critical step in the cable fault test. Even if there is an accurate coarse measurement distance, it is difficult for us to locate quickly and accurately due to the influence of the external environment. Super silent intelligent fixed-point instrument is a portable, super mute, visualization, including path indication of the impact discharge receive precise fixed-point instrument, with high voltage impact generator, using the impact discharge in the cable fault point of the magnetic field signal and sound signal time difference to determine the precise location of the cable fault point, and new technology, the background intelligent sound tracking noise reduction continuous optimization, perfect sound effect, by the headset discharge sound, can be used to assist to determine the position of the cable fault point, error within the diameter of the probe. With the function, it ensures the fast positioning.