BSL PRO 4 Manual - Biopac

Part C — Analysis Functions 277Event Location TableInsertion MethodEdge, at edgeEdge +/- percent offsetEdge +/- percent peak topeak offsetEdge +/- thresholdcrossingMinimumMaximumLocation ProcessPlace an event at the left or right boundary of the selected area, as specified.Given a particular channel, place an event at the specified time within theselection when the signal increases or decreases by a specific percentage.Left edge + Place at the time closest to the left boundary of theselection. The percentage is calculated from the value ofthe signal at the left boundary of the selected area.Right edge - Place at the time closest to the right boundary of theselection. The distance between the event and the rightedge of the selection will have an amplitude differenceequal to the indicated percentage of the right edge’svalue.If the signal does not increase or decrease by that percentage within theselection, no event will be inserted.Given a particular channel, place an event at the specified time within theselection when the signal increases or decreases by a specific percentage ofthe peak to peak delta of the selected area.Left edge + Place at the time closest to the left boundary of theselection. The percentage is calculated from the result ofsubtracting the minimum value of the signal over theselected interval from its maximum.Right edge - Place at the time closest to the right boundary. Thedistance between the event and the right edge of theselection will have an amplitude difference equal to theindicated percentage of the minimum value of the signalover the selected interval subtracted from its maximum.If the signal does not increase or decrease by that percentage within theselection, no event will be inserted.Starting at the specified boundary of the selection, determine a thresholdvalue. This threshold voltage may be:• fixed voltage level• value of signal at the specified edge + offset• mean value in selected area + offsetLeft edge + Search for the first location where the signal on aparticular channel crosses the threshold.Right edge - Examining data from right to left, search for the rightmostlocation where the signal on a particular channel crossesthe threshold.If the direction of the threshold crossing matches the user specified direction,then an event is inserted. If it does not, then the next threshold crossing islocated and the process repeats. If the threshold is never crossed within theselected area in the user-specified direction, no event is inserted.The event will be placed at the time location corresponding to a specificchannel’s minimum value within the selected area.The event will be placed at the time location corresponding to a specificchannel’s maximum value within the selected area.BSL PRO Manual