Procedure 1. Compensate the oscilloscope probes. 2. Connect the circuit in fig. 1.Use R= 10.0 (kQ), C=4.70 (nF) 3. Apply 4.00 (Vmp). 2.00 (kHz) sinusoidal waveform from the function generator. 4. Connect channel (1) of the scope to (node A) and channel (2) to (node B). 5. Set the scope to AC coupling. Trigger: Channel (1), negative slope. Adjust the horizontal and vertical controls so that both channels grounds are aligned with the middle line of the graticule. 6. Use the scope MATH button to display CH1- CH2. This waveform is the voltage across the capacitor. 7. Capture the scope screen. 8. Measure and record the peak amplitude of the voltage waveforms of the source (E), across the resistor (VR) and across the capacitor (Vc). 9. Measure and record the period of the source. 10. Measure and record the delay time between (VR) and (E) and the delay time between (Vr) and (Vc). (Use cursors). A B E R GND Figure. 1 EXI =Z I*X c=V c Calculated (pre-lab) Measured Difference % Quantity Peak amplitude of E Peak amplitude of VR Peak amplitude of Vc Delay To Delay TE Period T &c =(360) Tc/T DE =(360) TET NA NA NA NA B 1- Use the measured delay Tc and tz to compute Ac and D. Record the values. 2- Calculate the percentage of difference between the calculated and measured values. 3- Draw the phasor diagram for the measured voltages listed in table (1) above. Questions and Discussion 1- Compare the measured phase angle of the source E to the calculated one in the pre-lab, comment on any discrepancy. 2- Discuss what happen to the impedance of the circuit if a 4.7 (nF) capacitor is connected in parallel with the existing capacitor. 3- Discuss what happen to the impedance of the circuit if a 4.7 (nF) capacitor is connected in series with the existing capacitor. Appendix You must use a protractor to draw the phasor diagrams. It is assumed that you equip yourself with a good quality protractor. In case of emergency you can cut and use the one provided below. ac DAC_EECE1587 Lab.pdf IMG_7834DO Procedure 1. Compensate the oscilloscope probes. 2. Connect the circuit in fig. 1.Use R= 10.0 (kQ), C=4.70 (nF) 3. Apply 4.00 (Vmp). 2.00 (kHz) sinusoidal waveform from the function generator. 4. Connect channel (1) of the scope to (node A) and channel (2) to (node B). 5. Set the scope to AC coupling. Trigger: Channel (1), negative slope. Adjust the horizontal and vertical controls so that both channels grounds are aligned with the middle line of the graticule. 6. Use the scope MATH button to display CH1- CH2. This waveform is the voltage across the capacitor. 7. Capture the scope screen. 8. Measure and record the peak amplitude of the voltage waveforms of the source (E), across the resistor (VR) and across the capacitor (Vc). 9. Measure and record the period of the source. 10. Measure and record the delay time between (VR) and (E) and the delay time between (Vr) and (Vc). (Use cursors). A B E R GND Figure. 1 EXI =Z I*X c=V c Calculated (pre-lab) Measured Difference % Quantity Peak amplitude of E Peak amplitude of VR Peak amplitude of Vc Delay To Delay TE Period T &c =(360) Tc/T DE =(360) TET NA NA NA NA B 1- Use the measured delay Tc and tz to compute Ac and D. Record the values. 2- Calculate the percentage of difference between the calculated and measured values. 3- Draw the phasor diagram for the measured voltages listed in table (1) above. Questions and Discussion 1- Compare the measured phase angle of the source E to the calculated one in the pre-lab, comment on any discrepancy. 2- Discuss what happen to the impedance of the circuit if a 4.7 (nF) capacitor is connected in parallel with the existing capacitor. 3- Discuss what happen to the impedance of the circuit if a 4.7 (nF) capacitor is connected in series with the existing capacitor. Appendix You must use a protractor to draw the phasor diagrams. It is assumed that you equip yourself with a good quality protractor. In case of emergency you can cut and use the one provided below. ac DAC_EECE1587 Lab.pdf IMG_7834DO
