BSL PRO Software Guide - Biopac

52 Part BChannel selection Allows you to calculate a measurement either for the selected channel (SC) or from anumbered channel in the record. To switch between the channel options, click in the channel window. The pop-upmenu shows the channel numbers for all channels in the file. By default, each measurement will reflect the contentsof the selected channel.Measurement function Allows you to choose between different types of measurements. To choose ameasurement, click the measurement pop-up menu and select a measurement from the list. Depending on the natureof the measurement being taken, the windows can display information regarding a single point or a range of valueson the selected channel. Some of the measurements that depend on a selected area look at differences in thehorizontal axis, such as the delta T measurement, which returns the difference in time between the first sample pointin the selected area and the last sample point in the selected area. Other range measurements also select an area, butuse the vertical scale information in calculating measurements, like the peak to peak (p-p) measurement, whichcomputes the difference in amplitude between the maximum value in the selected area and the minimum value in theselected area.Measurement result Lists the result for the selected measurement across the selected area. If no data isselected, or if not enough data is selected for a meaningful measurement, the measurement result box will display“****.” In the following example, the BPM for the selected channel (SC) is 230.7, whereas the mean for theselected area of channel 1 is 0.18030, and the integral calculation for channel 40 is 0.04557.The number of measurement windows depends on (a) the width of the screen and (b) the number of rows selected inthe File > Preferences > General dialog box. By default, only one row of measurement windows is displayed. Asthe screen gets wider, more measurement windows can be displayed in the area above the graph windows.Visit the online support center at www.biopac.com