BSL PRO Software Guide - Biopac

207Math FunctionTransformation Resultradians.Result: for 0< x < π - is positive,For π < x < 2 π – negative.Sqrt (Square Root)Takes the square root (√) of each data point in the selected section.Result: Always a positive number.Threshold (Threshold datavalues)Transforms all data points above the upper threshold to +1 and all pointsbelow the lower threshold to 0.Once the data crosses a threshold it will continue to be set to +1 for theupper cutoff and to 0 for the lower cutoff, until it crosses the oppositethreshold.If the initial data lies between the upper threshold (UT) and the lowerthreshold (LT), the output is undefined.The most common application of this function is to serve as a simplepeak detector, the result of which can be used in rate or phasecalculations.Top: Signal + NoiseMiddle: P-P Noise > UT-LTBottom: P-P Noise < UT-LTResult: The sequence of 1 and 0 value according to data points.Note: Real-time Threshold values are +1 and –1 (see page 7106).