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OSU ENGR H192 - Use of Virtual Oscilloscope

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The screen should look something like the picture belowMeasuring Shutter SpeedENG H192 HANDS-ON LAB #1Part 2: Use of Virtual OscilloscopeStep 1 - Connect one end of the BNC cable to the light probe. Connect the other end of the cable to the back of the computer on ‘Ch 0’. (The rightmost of the three larger round connectors on the O-SCOPE card in the computer).Step 2 - Double click on ‘Virtual Bench – Scope’ on the desktop.Step 3 - Load the Camera Lab A settings file to set up the oscilloscope. (You should to do this twice to insure the settings have been completely loaded.) Ensure the “Run” button is “OFF” Edit  Load Settings Select ‘CameraA.sco’  OpenStep 4 - Check to see that you have the following settings:- Volts/Div = 2V- Timebase = 2 msec/Div- Trigger Source (Src) is ‘Ch 0’- Trigger Level = 1.2V- Trigger Position at the 2nd vertical grid line- The display should also be B&W to facilitate printingThe screen should look something like the picture belowVirtual Scope / Lab View Lab 1ProcedureStep 5 - Click on ‘Single’ to enable the capture. Press the button on the probe andshine the flashlight at the end. You should see a square wave that starts atthe trigger mark. If you experience difficulty you may need to reload thedefault settings or possibly restart the application and repeat the above steps.You should now be ready to capture the flash pulse. This section of the procedure willuse the project boxes available on the benches.- To begin the flash speed measurements, turn on the flash generator bytoggling the on/off switch.- Press and release the black button. You should hear the circuit begin tocharge.- Position the flash box and light probe across the table from one another,with the probe pointing at the box. A distance of about 3’ is good.- Once the flash ready light on the red LED turns on, hold the light probebutton down, click ‘Single’ then push the red button to trigger the flash.- Release the light probe button.- You may need to do this a few times to get good results.The capture should look something like this:Step 6 - Record your results. You can capture the active window by pressing ‘Alt+PrintScreen’ and pasting the image to Word. Be sure to label each plot. (Saveyour work!)Virtual Scope / Lab View Lab 2ProcedureMeasuring Shutter SpeedStep 7 - Reload the flash measurement settings file to set up the oscilloscope. (Youshould to do this twice to insure the settings have been completely loaded.)- Ensure the “Run” button is in “OFF”- Edit  Load Settings- Select ‘CameraA.sco’-  OpenStep 8 - Recheck to see that you have the following settings:- Volts/Div = 2V- Timebase = 2 msec/Div- Trigger Source (Src) is ‘Ch 0’- Trigger Level = 1.2V- Trigger Position at the 2nd vertical grid line- The display should also be B&W to facilitate printingStep 9 - You should now be ready to capture the shutter speed.- First, wind the camera shutter mechanism. (Your TA will show you how.)- Turn on the flashlight and point it directly into the camera lens as shown.- Hold the light probe inside the camera carefully lining it up with the lens.- While holding the light probe button down, click ‘Single’ then push the shutter release button.- Release the light probe button and remove the light probe from the camera.- You may need to do this a few times to get good results.Virtual Scope / Lab View Lab 3ProcedureThe capture should look something like this:Step 10 - Record your results and repeat this for each camera in your group. You cancapture the active window by pressing ‘Alt+Print Screen’ and pasting theimage to Word. Be sure to label each plot. (Save your work!)Step 11 - Submit your results- Print results by printing the Word document you created in the previoussteps.- Turn in your charts along with the diagram you printed from Lab ViewVirtual Scope / Lab View Lab


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OSU ENGR H192 - Use of Virtual Oscilloscope

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