BSL PRO Software Guide - Biopac

Acquisition Functions 133GENERAL TAB (OUTPUT PREFERENCES)Pulse MarkersAn advantage of using the BSL PRO software for output signals is that informationregarding the pulse is automatically recorded along with the data. On most chart recorders,information regarding the pulse level (amplitude), pulse rate, and pulse width must benoted by hand, a process that can be inefficient, time-consuming and error-ridden. With theBSL PRO:The amplitude reflects the output pulse level.Markers can be automatically inserted and labeled for each Reference pulse or change inpulse train. The label will contain the Pulse width and Pulse rate (and system time stamp ifselected).Markers reflect setting changes made during an acquisition.All output pulse information is automatically recorded and archived with the saved data.Set the marker option by clicking in the box to “Create marker when output is changed.”Set the time stamp option with the global Marker Preferences available under the File menu(see page 7179).The marker label accurately captures pulse data, but the marker arrow may not always lineup exactly with the leading edge of the pulse; this typically is not a problem because therecording will include the actual stimulus pulse which can be used for timingmeasurements.Depending on the acquisition Sample Rate, the leading edge of the pulse in the recordingmay not correspond to the exact time the pulse was sent—it may be off by as much as onesample period. If the marker precision is critical for your recording, increase the SampleRate.To display markers, use the toolbar icon or Display>Show>Markers.The Range switch on the front of the BSLSTM stimulator should be set to 10V or 100Vprior to recording and should not be changed during recording; if using a Preset, thecorresponding Preset should also be selected prior to recording. The pulse level can then bedetermined by moving the decimal to the right or left depending on how the range wasswitched.