As part of the Cluster Wave Experiment Consortium (WEC), the Wideband Data (WBD) Plasma Wave Investigation was designed to provide high-resolution measurements of both electric and magnetic fields in selected frequency bands from 25 Hz to 577 kHz. Continuous waveforms were digitized onboard and transmitted in either a 220 kbit/s real-time mode or a 73 kbit/s burst mode. The real-time data were received directly by a NASA Deep-Space Network (DSN) receiving station or an antenna located at the Panska Ves Observatory, Czech Republic, and the burst-mode data (BM2) were recorded onboard and transferred to the spacecraft solid-state recorder for later playback. On the ground, the waveforms are examined for evidence of nonlinear and linear signals, and transformed via wavelet transforms for analysis in time and frequency and via Fourier transforms for analysis in frequency space only. The WBD measurements complement those of the other WEC instruments and also provide a unique new capability for performing very-long baseline interferometry (VLBI) measurements.