Interactive Biomedical Universal Signal Source (iBUSS) delivers almost all imaginable biomedical waveforms in the amplitude from 1.0mV to 30.0V at 80dB signal to noise ratio (p-p) with good shaped EEG signals at a low amplitude down to 10.0uV (p-p). Predefined basic signals and record signals as well as signal design tools are provided, with which the user can design virtually any arbitrary waveforms and combine any desired waveforms. The user can easily design a series of various signals called test solutions with any arbitrary waveforms for a complicated and multi-step test.