A computer bus which operates at 200 MHz clock frequency has been constructed using an absorptive high-cut filter line based on the time domain analysis of the pulse transmission in the bus. The filter has enabled the rapid buildup of the pulse as well as the suppression of the resonance, which damages the gates of ICs. The results of the experiment have led to the concept of spectrum management, and quantitative discussions have been made. The experiments have also confirmed that the bus has contributed to the reduction of the unwanted radiation. This bus structure and the spectrum management are essential for the rapid operation of the computer.