BSL PRO Software Guide - Biopac

Introduction 37Vertical scaleClick the cursor in the vertical scale area (on the right edge of the window, where units are displayed) togenerate the Vertical Scale dialog. The Vertical Scale dialog — when display grids are not locked — isshown below. Note that the Vertical Scale dialog will vary if grids are “locked.” See page 6174 for adiscussion of Grid Options and how locking grids (Display>Show>Grid Options Display>Grid Options:Lock Grid Lines) affects the Vertical Scale dialog.Default Vertical Scale (Grid Unlocked)Channel Use this option, available only when grids are not locked, to jump to another channel and set itsvertical scale options without having to close out of the dialog.Scaling… The Scaling… button appears in the "Vertical Scale" dialogregardless of the scale or grid mode if there is hardwareassociated with the channel. This gives fast access to theChange Scaling Parameters dialog for calibration control.Scaling changes will be applied following the next start ofacquisition, and must remain the same for all appendedsegments.Scale This determines how many units (usually Volts) are displayed in each track. Smaller Scale values increasethe apparent amplitude, larger values decrease the apparent variability. Entering a number about half the currentvalue will cause the amplitude of the wave to appear to double.Midpoint This sets the median value display for the track. You can vary the midpoint and apparentmagnitude of each waveform by changing the Midpoint entry. If Midpoint is set to 2 mVolts, the selected channelwill display a range from - 4 mVolts to + 8 mVolts.Precision This setting determines the number of digits to follow the decimal (default is 2). Significant digitswill be rounded rather than truncated. The vertical scale precision setting applies only to the specified channel. Thissetting is for scale precision only; you must set measurement precision separately under Display > Preferences >General.All Channels Click in this box to apply the setting to all channels rather than to the selected channel only. TIP Use Display > Autoscale Waveforms to have the software automatically adjust thevertical scale parameters so all ampoitude data in the current time slice (horizontal scale)will be displayed.