RSDGC-3H adopts present international advanced “multi-times pulse” technology, self-developed test technology and the device for high- frequency and high- voltage data signal. Equipped with the best cable fault waveform judgment ability and the most simple and convenient operating system. Multi-pulse method greatly simplifies the fault waveform measured in the field and turns the complex high-voltage shock flashover waveform into the short-circuit fault waveform similar to low-voltage pulse method which is very easy to read, which reduce the technical requirements and experience requirements for operators. Therefore, the judgment accuracy of field fault is greatly improved. Anyone can easily and accurately interpret waveforms and calibrate fault distance, so as to quickly and accurately test cable faults and greatly improve the success rate of fault testing, better than all traditional cable instrument and comparable with similar products abroad. The performance and price is also much better than similar products at home and abroad. The tester adopts 10 inch real-color touch screen, display waveform clearly and easy to operate. It is the main supporting equipment of our serialized cable fault test instrument.