User manual

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5. Disable the FGEN output.
Exercise 2.4: Calculating Power
Using the equation for power and your results from the previous exercises, calculate the power drawn by the circuit
when using a DC and an AC signal source. Fill in Table 2.2 with your results.
Average Power
Measured Resistance
Measured Voltage
Voltage Source
DC signal source
AC signal source
Table 2.2. Measured Circuit Results
Recall that at the beginning of this section, you saw a similar table using a simulated circuit. How do your measurements
compare with the measurements made on the simulated circuit? Are they approximately equal or are they different?
Why do you think this happens?
Expected Results
From the three measurement exercises, you should expect the following results:
 Exercise 2.1: The resistance measurement should be very close to the simulated resistance measurement.
 Exercise 2.2: The DC voltage measurement should be significantly lower than the simulated DC voltage
measurement.
 Exercise 2.3: The measured RMS voltage should be significantly lower than the simulated RMS voltage
measurement.
 Exercise 2.4: Since power is directly proportional to voltage, the calculated average power should be less than
the average power calculated with the simulated results.
Observed Results
Figure 2.13 shows the different measurement results from the three measurement exercises.
Figure 2.13. (a) Measured Resistance, (b) Measured DC Voltage, and (c) Measured AC Voltage