Oscilloscope 101

This exercise was to familiarize ourselves with the use of the oscilloscope and to study and adjust different waveforms on the frequency generator.

Exercise 1
We began by displaying a simple sinusoid on the oscilloscope with the following setup:

According to the scope,

The period was at 208 microseconds.

Peak-to-peak amplitude was 10 V.

Zero-to-peak amplitude was 5 V.

Anticipated RMS value was 3.54 V.

We measured the VDC and VAC RMS values and got the following:

VDC = 6.2 mV

VAC = 2.34 V

The  VAC value was close to our anticipated RMS value.

Exercise 2

The next exercise was to add a 5 V offset to the existing waveform.

We measured the DC and AC voltage with the DMM.

VDC = 5.35 V
VAC = 2.45 V

Exercise 3
We measured the DC and AC voltages.

VDC = 5.2 V
VAC = 5.13 V

The expected VAC value for a square wave is 5 V, which is similar to the value we measured with the DMM.

Mystery Signals
We were given an unknown signal generated by the frequency generator and attempted to trigger on the signal. However, the limitations of the oscilloscope prevented us from fully triggering on the signal. The output is as follows:

The signal was a triangle pulse with the following:

DC voltage: 0.5 V 

Frequency: 7 Hz

Pk-pk Amp: 1 V