BSL PRO 4 Manual - Biopac

158 BSL PRO ManualValues entered into a control panel or its Preferences dialog that are outside the specifications of the outputdevice, or outside the limits defined by the Preferences dialog, may change automatically to reflect either theclosest value to that requested that the hardware can achieve, or the closest increment defined by the limits inPreferences. (The system will not check while you type, it checks and may make changes after the value isentered.)For example, if a Pulse width of 5 ms is entered into the Pulses Output Control panel entry box, butPreferences defines a range limit of .5 to 2 ms for Pulse width, the system will automatically change the newentry to 2 ms.Saving Panel settings:Output Control panel settings will be retained until a file is closed or saved. If a file is closed but not saved,settings will be lost (defaults established); if a file is saved, panel settings will be saved.CH# to Output Output ControlThe CH# to Output Output Control redirects an analog input signal to the Analog Out port on the back of theMP UNIT. The signal from the assigned channel will continue to be recorded and plotted as it normallywould. This Output Control is used mainly when attaching headphones to the MP UNIT to listen to signalscoming in on an analog input channel. One common use is listening to the EMG (muscle) signal, a clinicalprocedure physicians use to actually hear certain problems with muscles.To display this control panel:Choose MP UNIT>Output Control>CH# to Output to open the control panel.MP36/35 users may use analog input CH1-CH4. Channel 3 is the default setting. If another channel N hasbeen designated, the menu will read “CH.”MP45 users may use analog input CH1 or CH2.Use the control panel ON/OFF Switch to start and stop output. OFF grounds the output so no signal (orsound) should be present.MP45 users—The ON button can be pressed at any time, howeversound will only be heard during acquisitions. The button will remainON until it is manually turned OFF or until the control panel (or file) isclosed.PreferencesSet Preferences to designate which channel to redirect to output.MP36/35 users—Open the Preferences dialog (right-click in the control panel or choose File > Preferences >CH# to Output).Use the pull-down menu to select the desired channel CH 1-4 to use for the output.Click OK to set the output channel and return to the control panel.MP45 users—Access Preferences via the right-click contextual menu when the cursor is over the controlpanel. The options are CH 1 (default) or CH 2.Note Only the Hardware settings (Gain, Offset, Input Coupling) from the Input Channel Parameters dialog(MP UNIT > Set up Channels) will be applied since output is established prior to the processing of DigitalFilters.See page 332 for MP UNIT Input > Output Scaling values.Visit the online support center at www.biopac.com