Lab 1 - Testing / Measure
Figure 1 - Oscilloscope for Part 1
In our first lab experiment, the primary objective was to learn how to use and become familiar with the lab equipment.
The first part of the lab asked us to create a 10kHz sine wave with an amplitude of 1V. This wave can be seen in Figure 1. After looking at the wave on the oscilloscope, Step 2 asked us to use the DMM to measure the voltage. The DMM gave us a voltage of 0.67V, which I concluded was the RMS volatge (Vp/sqrt(2)).
Step 3 asked us to do the same experiment, but with the 4040 function generator. The result was exactly the same for both the oscilloscope and DMM measurements.
Part 1.2 of the experiment had us create an AM signal using only the 4040 function generator. The result is shown in Figure 2.
Figure 3 - 50% Modulation Signal
Figure 2 - Oscilloscope for Part 1.2
Next, the experiment had us use the 3311A function generator to send a larger modulation signal to the 4040 function generator.
We wanted to create a 50% modulation, which is shown in Figure 3.
Once we had a 50% modulation, we were able to use the oscilloscope to find the frequency and dB of the carrier and sideband AM signal. With this information, we could calculate the RMS voltage and voltage amplitude. All of these values are shown in Table1.
The experiment was repeated for 100% modulation, and those values are shown in Table 2.
Table 1 - 50% Modulation
Table 2 - 100% Modulation
In conclusion, this lab provided us with the fundamentals needed to perform the rest of the lab experiments. AM modulation is a key component to the ELEC 3030 lab series as well as many other classes such as Electromagnetics and Analog Electronics.