BSL PRO Software Guide - Biopac

168 Part DMEASUREMENT Area EXPLANATIONMedian TMinAll points ofselected areaMinimum area:2 samplesUses:All points ofselected areaMinimum area:1 sampleUses:All points ofselected areaUnits: VoltsMedian T shows the time of the data point that represents the medianvalue of the selected area.Note: The median and calculation is processor-intensive and can take along time, so you should only select this measurement option when youare actually ready to calculate. Until then, set the measurement to “none.”Units: Seconds.Min (minimum) shows the minimum amplitude value of the data samplesbetween the endpoints of the selected area.Note: For a single point, Min shows the amplitude value in this point.Units: Volts.Min TMinimum area:1 sampleUses:All points ofselected areaMin T shows the time of the data point that represent the minimum valueof the data samples between the endpoints of the selected area.Note: For a single point, Min T shows the time value in this point.Units: Seconds.None n/a None does not produce a measurement value. It’s useful if you arecopying a measurement to the clipboard or journal with a window sizesuch that several measurements are shown and you don’t want them allcopied.P-PSamplesSlopeMinimum area:2 samplesUses:All points ofselected areaMinimum area:1 sampleUses:All points ofselected areaMinimum area:2 samplesUses:All points ofselected areaP-P (peak-to-peak) shows the difference between the maximum amplitudevalue and the minimum amplitude in the selected area.Results: The result is always a positive value or zero.Units: VoltsSample data file: “ValidateMeasurements.ACQ”Result: 13 Volts (for whole wave).Samples shows the exact number of samples of the selected waveform atthe cursor position—the first data point is not displayed, but is plotted atzero.See page 7159 for examples of selected area Samples.Note: When an area is selected, the measurement will indicate the numbersamples in the waveform at the last position of the cursor.Units: Samples.Slope computes the non-standard regression coefficient, which describesthe unit change in f (x) (vertical axis values) per unit change in x(horizontal axis).For the selected area, Slope computes the slope of the straight line thatintersects the endpoints of the selected area and can be found using theformula:Slope =fxf xnx xVisit the online support center at www.biopac.comn11