lab
lonilo
lab.docxModule 3A Laboratory : FM Signals
Introduction
The purpose of this experiment is to examine the principles of Frequency Modulation
Procedure
1. Start Commsim and open the diagram file FM_Modulator.vsm in the Modulators folder.
2. Simulate the circuit. You should see results similar to the following:
3. The information signal is so complex it is hard to see its affect on the carrier frequency. So, double-click the Source block and change the four signal source's to the indicated parameters:
Note that double-clicking a signal source block brings up its parameter dialog.
4. Resimulate the circuit and note the changes to the carrier signal.
5. Go inside the Equivalent FM Demodulator and note its diagram complexity. Investigate its sub-blocks.
Discussion
While reviewing your data and results, provide detailed answers to each of the following:
1. What is the equation implemented by the Equivalent FM Demodulator?
2. What change in the information signal causes an increase in the carrier frequency?
3. What are the delays for in the Equivalent FM Demodulator?
