BSL PRO Software Guide - Biopac

Acquisition Functions 71Acquire DataCheck the option Acquire Data if you wish to collect data on a channel. Unless you specify otherwise, BSL PRO by default willonly collect data on Channel 1. To collect data on other channels, position the cursor over the Acquire box (on the far left) andclick the left mouse button. Toggle the Acquire box to uncheck.‣ With BSL PRO, it is possible to leave hardware connected to the MP Acquisition Unit, but have thesoftware essentially “ignore” the channel by leaving the Acquire box unchecked. Thus, if an inputdevice (such as a force transducer) is connected to the CH3 input on the MP, data from that channelwill not be collected unless the CH3 Acquire box is checked.Plot on ScreenThe second option determines whether or not data for each channel will be plotted on the screen. In most cases, you will want tocheck this option. When this box is left unchecked, data will still be collected when the Acquire box is checked, but it will not bedisplayed during the acquisition.Disabling Plot on Screen can be useful fora) Large scale acquisitions (i.e., multiple channels and/or high sampling rates). This will allow for faster display rates (seeAppendix B - Hints for working with Large Files for other options).b) Calculation channel setup. For example, you may need the ECG Rate data for a calculation, but not need to see the ECGdisplay.Enable Value DisplayThe third option enables incoming data values to be displayed either numerically and/or in a “bar chart” format in a separatewindow during an acquisition. Checking Enable Value Display allows you to open an Input Values window (by choosingShow Input Values... under the MP UNIT menu) that displays the value for each input that has the Enable Value Displayoption checked.‣ This option is especially useful for tracking slowly changing values such as heart rate, respiration rate, orconcentrations of chemicals in a substance. For more information on how input values are displayed,please turn to page 6150. TIPHold down the Ctrl (PC) or Option (Mac) key while you check an Acquire, Plot, or Enable ValueDisplay box to toggle the entire column of boxes for that option. In other words, if none of theAcquire boxes are checked and you check the Acquire box for CH1 with the Ctrl key depressed,the Acquire boxes will be checked for all channels. If the Acquire box for CH1 is then uncheckedwhile the Ctrl key is depressed, the Acquire boxes for all channels will be unchecked.LabelYou may attach an editable “label” to each channel to provide a brief description for each channel. To change the label for anychannel, position the cursor in the Label box and enter a text label. You may key up to 38 characters.When a Preset is selected, a corresponding preset Label description will be automatically entered.A channel’s label is used in the display window and for a variety of software dialogs. If you revise a label entry, the change willdisplay after you start an acquisition.PresetsPresets are like “templates” for channel parameters. There are two ways to establish channel parameters. You make a selectionfrom the PresetsParameterstool.menu and (1) use the corresponding default parameters or (2) modify the Preset using the View/Change