Data Acquisition Using Analog Output in BioBench

The following information also is located in the BioBench User Manual (linked below).

If your Data Acquisition (DAQ) hardware can generate analog output, BioBench allows you to acquire and display multiple signals in real time while simultaneously producing an analog output signal. The analog output signal is based on user-defined parameters. To configure BioBench to generate an analog output signal, perform the following steps:

1. Select Configure»Channels to assign each signal to a channel. See other BioBench examples (linked below) to learn about setting up acquisition channels.


Note: You can view and record the output stimulus by splitting out the output signal and connecting one of the cables to an available input channel (ACH0, ACH1, ACH2, and so on) on your National Instruments terminal connector (for example, BNC-2080, BNC-2090). Refer to the user manual of your DAQ hardware for details.


2. Click on OK to confirm your channel configuration.



3. Select Configure»Settings, then set your parameters for timing, alarms, and output stimulus signals in the dialog box that appears. Set up the Stimulus tab of the Configuration Settings for Acquisition dialog box as follows. If you choose to view the stimulus signal as you acquire your data, be sure to include the analog input channel connected to the analog output in the Scan List of the Timing tab.



1. Select the Front Panel Manual Control radio button. This option allows you to generate an analog output signal by clicking on the stimulus output button (the button labeled OUT).



2. Enter the desired values for Off Voltage and On Voltage.



3. Click on the OK button to confirm your settings.


Note: In addition to manual control, BioBench can generate analog output signals in the form of a user-defined pulse or by reading a predefined waveform from a file. The selected output signal can be continuous or can iterate for a defined number of times. Refer to the Defining an Output Stimulus section of Chapter 2, Setting Up Your System, of the BioBench User Manual (linked below) for more information.

BioBench issues the output stimulus on Analog Output channel 0. Refer to the user manual for your terminal connector for details. Because you configured the stimulus output to be Front Panel Manual Control, BioBench generates the predefined analog output On Voltage whenever you click and hold on the stimulus output button (the button labeled OUT on the Acquisition view). BioBench generates the predefined analog output Off Voltage whenever you do not click on the stimulus output button.


4. Click on the GO button to begin your acquisition and the STOP button to end it. During acquisition, try clicking on the OUT button to change the analog output voltage of BioBench.

Note: Analog outputs can only be generated when BioBench is acquiring data.

Related Links:
BioBench User Manual
Pressure-Volume Data Acquisition with BioBench

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