Lab 12: Oscilloscope 101

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.

Procedure:

Exercise 1: Displaying and measuring a sinusoid
- Set the Function Generator to produce a sinusoid
- Set the sinusoid frequency to 5kHz
- Set the peak amplitude to 5V
- Verify on the scope

Period: T = 4.1 x 50ms = 205ms
Peak to peak Amplitude: 10V
Zero to peak Amplitude: 5V
RMS Value: 5/sqrt root (2) = 3.53 V

Verify with the DMM:
VDC = 0 V
VAC = 3.33 V

VAC is equivalent to the RMS value.

Exercise 2: Including a DC offset
- Add a +2.5V DC offset to the FG.
- Measure the DC and AC

     VDC = 2.5 V
     VAC = 1.17 V
The VDC is equal to the DC offset, the VAC is the same as RMS.

Exercise 3: Displaying and Measuring a Square Wave with offset
- Switch the FG setting to square wave
- Measure the DC and AC voltage

    VDC = 0 V
    VAC = 2.6 V
- Calculate: VAC = Sqrt root(2.5² x 4x50ms/4x50ms)  = 2.5V

Exercise 4: Measuring a Mystery signal:

DCV = 0.03 V
T = 1.5x5ms = 7.5ms
f = 1/T = 0.13 MHz
peak to peak Amplitude: 6.5x20mV = 0.13V