Lab 4

2.

The “Horizontal position” knob should be set facing vertically straight up, otherwise the image will be offset to the left or right.

The “Vertical Position” knobs need to be set facing vertically straight up, if they arent the image will be offset on the y-axis.

The “Mode” switch on the scope should be set to “Dual”. This ensures that both inputs are being shown at the same time(so we can see how turning the pot on our breadboard will change the volume).

Both switches that determine the type of current on the bottom of the scope should be set to DC, since for this experiment we were measuring Direct Current, not Ground or Alternating Current(ac can technically work for some situations, but in this case it should be DC).

The “Focus” and “Intensity” knobs are used to determine the definition and brightness of the waveform shown on the scope, respectively. 

The “Time/Div” (Time Per Division) knob determines how much time each square on the scopes screen represents horizontally.

The “Volts/Div” (Volts per Division) knob determines how many volts each square on the scopes screen represents vertically.

The “Trigger Level” knob is used to determine at what point in the waveform the oscilloscope will start visually showing the waveform. For this experiment, it had to be in the middle.

Finally, when connecting the probes on the oscilliscope to the circuit, the red end had to touch the actual circuit and the black end had to be connected to ground.

As you turn the pot on the circuit, it lets either more or less of the current through. It ranges from allowing 0% to 100% of the current through. The pot effectivley serves as a volume knob.