One of the most widely used electronic test equipment is oscilloscope which can display the shape of a video pulse appearing at a selected equipment test point in time domain. Spectrum analyzer also is test equipment which used to sweep over a band of frequencies to determine what frequencies are being produced by a specific circuit under test, and then the amplitude of each frequency component.This project, called PC based software for time and frequency domain, is to develop software and display signals in both domain using DAQ card instrument. Using this software, one can produce more organized data display and at the same time increase the screen size. By using Visual Basic 6.0, the interface will be designed with friendly graphical user interface (GUI). This software also has data management like saving data and picture, loading, screen capture and control wave in real time. USB port will be used for connection between PC and hardware.