BSL PRO Software Guide - Biopac

212 Part DDerivativeTransform > Derivative dialog boxThe Derivative function calculates the derivative of the selected area of a waveform (or the entire waveform if ithas been selected).Window Since high frequency components will give you nonsensical results in a derivative, a low passfiltering function is included in the derivative function. Select a Window type from the pull-down menu.Cutoff Frequency The value should be roughly equivalent to the highest frequency component ofinterest. (See page 7201 for more information on low pass filters.)Don't modify waveform This option is only applicable when Show Filter Response is selected. TIP If the data is already “well behaved” (i.e., low pass filtered or contains little or no highfrequency information), use the Difference transformation with a 2-sample interval. Thiswill provide results very similar to the Derivative function, but will work much faster.IntegrateThe Integrate transformation works the same as the Integrate calculation (see page 794 for formulas) and details.Visit the online support center at www.biopac.com