The PWI consists of three different sets of receivers: (1) the Sweep Frequency Analyzer(SFA), (2) the Multi-Channel Analyzer(MCA) and (3) the Wave-Form Capture(WFC). The first two sets of receivers are devoted to measuring wave spectra, while the last one is designed to capture wave forms from two electric and three magnetic field components of the measured wave emissions, simultaneously. The frequency ranges of the electric and the magnetic fields which can be measured range from 5.6 Hz to 800 kHz and from 5.6 Hz to 12.5 kHz, respectively. The frequency range of wave forms which can be captured by the WFC is from 10 Hz to 4 kHz. The block diagram of the PWI system is shown in Fig.1.

PWI observation data are available in three types of telemetry formats called Format 1, 2, and 3. Format 1 includes the SFA and MCA data. These data are recorded onboard magnetic data recorder and played back to NASA Deep Space Network.
Format 2 is a real time observation mode supported by Usuda Deep Space Center (UDSC) in Japan. It includes all of PWI observation data with the highest resolution.
Format 3 is an unusual observation mode. We mainly use this format, when we need to monitor US SIs' data in real time, because Format 2 does not include any US SIs' data. Format 3 includes all of PWI observation data, however, WFC data quaities are coarse relative to those in Format 2.