EE214 Electric Circuits 1
Dept. of Electronic Engineering, Maynooth University
Laboratory Sheet 1 (Revision Material)
Using the Oscilloscope and the Function Generator
Group ID Number:
Collaborator1 Name:
Collaborator2 Name:
ID Number:
ID Number：
 Task 1: Connect the Function Generator output to the oscilloscope channel X. Obtain
a 1kHz square wave, amplitude 2V pk-pk. Make sure the DC offset is set to zero. Ask a
demonstrator for help, if required. Save a copy of this wave to your report (see section 4).
(a) Use the measure function on the oscilloscope to measure and record, in your report, the
peak-peak voltage, frequency, and period.
(b) Experiment with the DC offset setting on the function generator. Describe the effect it
has on the waveform.
(c) Obtain the following waveforms on your scope:
(i) 22 KHz triangle wave, 0.5V peak, DC offset 1V
(ii) 300 Hz sine wave, 5V peak, DC offset 0.5V
Provide a capture of each graph in your report.
Dr. Zhicong Chen, Maynooth University
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EE214 Electric Circuits 1
 Task 2: Connect up the circuit as shown on the right. Look at
the source voltage on Channel X, and the voltage across the lower
4.7k resistor using Channel Y. View them simultaneously on the
scope. You will need two leads for this. Save a copy of these waves 350Hz
to your report.
5V peak
4.7k
4.7k
Measure and record, using the scope, the peak voltage across the
lower 4.7k resistor. Is this as expected? Explain your reasoning.
 Task 3: Insert a 100nF capacitor into the circuit to replace the
lower resistor, as shown in the circuit on the right. Display the source
voltage on Channel X and the voltage across the capacitor on Channel 350Hz
Y of the scope. Save a copy of these waves to your report.
5V peak
4.7k
100nF
(a) Record the peak capacitor voltage?
(b) Are the two waveforms in phase? If not, measure and record the phase difference
between the waveforms (ask a demonstrator for help if required).
(c) Increase the source frequency to 1kHz. Record the new peak voltage across the
capacitor. Now decrease the source frequency to 100Hz and record the voltage again. What
can you say about the voltage dropped across the capacitor as you change frequency up and
down?
(d) Experiment with the trigger level dial on the right hand side of the oscilloscope. What
effect does this have on the waveforms?
Dr. Zhicong Chen, Maynooth University
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EE214 Electric Circuits 1

Conclusions
Dr. Zhicong Chen, Maynooth University
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