BSL PRO Software Guide - Biopac

228 Part DOff-line averagingThe Off-line Averaging option works with all peak detection modes. With this option selected, you will be ableto average waveform data together from different reference points in the complete data record.For instance, if the Find peak: Positive peak mode is selected for the purposes of evaluating an ECG record, theoff-line averaging feature will generate a composite ECG cycle. This composite will be the “average” cycle ofsome specified number of separate ECG cycles, where each cycle is referenced to the peak in the QRS wave.Control Channel The Control Channel (Trigger channel) pull-down menu lets you select a channel touse as a trigger while performing the average on the selected channel. To select a channel, click the channel boxabove the display window.Setup Averaging The Setup Averaging button generates the dialog box shown below:Averaging RangeEntire waveform Use all relevant data in the entire waveform to generate an averageSelected area Use only relevant data from the selected area of the waveform to generate an averageFrom start…# Collect relevant data at the start point and continue until the specified number of averages isreached.From start…end Collect relevant data at the start point and continue until the end of the data file is reached.Artifact rejectionArtifact rejection is used to eliminate suspect data from the averaging process. Suspect data is identified as anysample value in a relevant data block that is higher or lower than the respective Reject High and Reject Lowlevels.Ave StartThe OK button switches to “Ave Start.” Click the button to activate the settings after choosing the controlchannel and establishing the averaging options.Visit the online support center at www.biopac.com