Oscilloscope

 

Purpose:
The purpose of this experiment was to study using an oscilloscope to detect and adjust different waveforms.

Introduction:
An Oscilloscope is an electronic device that is used to display time-varying signals and make appropriate measurements. In this experiment, we are going to explore the oscilloscope by varying the signal input with different amplitudes, frequencies, and shapes.

Experiment:



A sinusoid waveform was generated by the generator.

 

  Period: 200 micro seconds

  Peak-to-Peak Amplitude: 11.4V

  zero-to-peak amplitude: 5.8V

 

 aniticipated RMS value: 5.336V

 

 

 The VDC and VAC RMS values of the generator were measured:

 



     VDC = 2.8mV
     VAC = 3.35 V

     VAC value was close to the anticipated RMS value.

   
    DC Offset

 We add an offset of 2.5 V, and another one at 5V

DC Coupling at 5V

AC Coupling at 5V

The difference is that we can see the offset in DC coupling while nothing changes in AC.
2.5V offset measurements:
VDC = 2.51 V
VAC = 3.37 V
The VDC shows the offset in the output like the graph while the offset does not affect VAC.


    Square Waveform

   A square waveform was generated by the generator.
  

  The VDC and VAC RMS values of the generator were measured:

        VDC = 10mV
        VAC = 5.33 V

        Compared to expected VAC measurement, VAC = 5V, the measured VAC value was close to the theoretical value.


      Mystery Signals

      A mystery signal was adjusted and measured during the lab. After a while of adjusting, the final waveform is shown below:

     The more accurate waveform is:

  

      DC Voltage: 460 mV
     Frequency: 70Hz
     Pk-Pk Amp: 940 mV


Conclusion

     This experiment was successed. The results are changing voltage and frequency can making ddifferent graph. The new digital oscilloscope is much better than the heavy traditional ones.