BSL PRO Software Guide - Biopac

190 Part DFile > Preferences > General: Display Preferences Dialogtype of waveform displaying more than 2400 samples on the screen at any one time. Usingthe default horizontal scale (which plots eight seconds of data on the screen), any datasampled at more than 300 samples per second would be considered “compressed.”Enable tools duringacquisitionUpdate screenintervalFull, Half or Quarterpageat a time TIPOther OptionsAutoscale aftertransformationsTile aftertransformationsUse all availablememoryInterpolate pastingsNoteActivates the selection, I-beam, and zoom tools during an acquisition. The default is todisable these tools during acquisition. Use of tools during an acquisition may create displayproblems. It is recommended that you only turn on tools for very slow acquisitions.The Update screen interval option lets you adjust the rate that the screen is updated,which can be useful when you have a large data file (as in sleep studies) and you want toquickly jump through the data.You can set the interval to update in full page, half page, or quarter page increments. Clickin the circle next to the desired interval in the “Update screen interval” section and thescreen will update in the selected interval when you scroll through the data using the thehorizontal scroll bar.Right-click in the Horizontal Scale region and choose the desired screen intervalfrom the menu.There are four “Other Options” at the bottom of the dialog. The first two options controlthe amplitude (vertical) axis after data has been transformed (e.g., filtered ormathematically operated on). Neither option affects the horizontal axis.Automatically rescales all waveforms after a transformation to provide the “best fit” alongthe amplitude axis.Tiles all visible waveforms after any transformation, and is mutually exclusive of theAutoscale command. Waveforms appear to be stacked on top of each other.Attempts to use all the available memory for loading data. Otherwise, a variable sizedbuffer is used to load portions of large data files. This option works best if there is enoughfree memory to load the entire data file.Interpolates/extrapolates time base data to fit the sample rate of the destination windowwhen working with data sampled at two different rates.When you Interpolate pastings, you should copy data to a higherresolution window. Although it is possible to copy data in the otherdirection (from high resolution to low resolution), it is not recommendedsince some resolution will be lost in the process.For example, if you have one 30-second waveform sampled at 50 samples per second, andanother 30-second waveform sampled at 2,000 samples per second, you can copy thecontents of one window into another using the insert waveform command. This willinterpolate one waveform so that both appear to be 30 seconds long. In this example, datawould be copied from the 50 Hz (low resolution) window to the 2,000 Hz (high resolution)window.Visit the online support center at www.biopac.com