PC Test Set 2000

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The PC Test Set receives raw data from MIDAS or other hardware devices and it can also simulate data and read data files from a disk. Raw data is organized in data frames; each frame contains acoustic channel data, NAS (non-acoustic sensor) data, and sync/calibration information.

Processing involves extracting acoustic channels (hydrophone data) from the raw acquired data and grouping similar acoustic data types together. Signal processing functions are then applied to this channel-acoustic data. The specific functions are determined by the processing “assignment” selected by the user. Several assignments are available: a time-series representation, spectral and spatial frequency transforms, channel to channel phase differences, channel-power monitoring, and array self-noise monitoring.

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The displays available are surface, cut, and monitor. Surface displays provide a three axis representation of the entire data set (color being the third axis). Cut displays capture a 2-D “oscilloscope” display of a cut through a surface display. Monitor displays are used by technicians as a quick reference as to the performance of the system (Red – Problem, Green – Operational).

In addition to the displays, statistics are generated for the cursor location within the display, such as AC RMS voltage, DC bias, Mean, Median, Std Dev of a “cut” through the data.