VVI — Data Acquisition

DAQ Plot is also a real-time, multi-channel oscilloscope with temporal and spectral plot output. With appropriate hardware and methodology DAQ Plot can be used to determine natural frequencies, resonant peaks, decay curves, harmonics, frequency content and more. Depending on the hardware used to acquire the signals, it can be applied to projects from vibration and seismic analysis up to radar and laser analysis.

The figure below shows a typical waveform in the time domain produced by the traditional strip chart feature of DAQ Plot.

The plot above shows some periodicity in the signals, but it is hard to discern the nature of the periodicity, harmonics or energy distribution as a function of frequency. The spectral plot of the signal, as shown below, shows the spectral information in a quantitative format which permits better analysis and isolation of the energy in the signals as a function of frequency.

Both time and frequency domain representations can be displayed at the same time in DAQ Plot which leads to a straight-forward presentation because one representation can be correlated against the other.

Main Features

Real Time	Temporal and spectral plots are displayed in real time as data is being collected. The multi-threaded and parallel-processing design means that your computer is used to its full potential.
Loaded With Features	The oscilloscope can display up to 16 channels in the time and frequency domain, independently and at the same time. Each channel can be turned on or off depending on the result you want. Autoscale, colors, one or two y-axis graphs are just a few of the features available. All processing features, such as filters and triggers, apply to spectral processing as well. Both temporal and spectral representations can be exported in tab delimited text format for spreadsheets and other uses. Plots can be exported to Vvidget Builder for additional layout, markup and importing into reports.
Historical Analysis	When you pan the time signals back in time the spectral output pans to reflect the historical data shown. An adjustable buffer determines how much data is saved for historical purposes. While reviewing historical data the current data acquisition continues. Scrolling forward to present time causes the output plots to update with new data in real-time.
Wide Applicability	The oscilloscope can be used with the off-the-shelf Pro hardware for signals sampled up to 50Khz or it can be used with custom hardware to display content from very taxing acquisition projects. Either way, a robust design lays the foundation to solve a multitude of real-world problems.