The Eclipse is a high performance, digital signal averager supplied as a compact line-powered console designed to be operated from a personal computer via the supplied PCI-bus plug-in card and connecting cable. The instrument includes a full applications software package, designed for Windows 98/XP, which gives access to all the unit's controls and graphically displays acquired records, as well as allowing live or post acquisition trend analysis. In addition, an FFT display mode calculates and displays the intensity versus frequency spectrum of recorded waveforms. Alternatively, the user can develop his or her own software using the supplied ActiveX controls, which are compatible with most modern programming languages.