1. Explain the basics of analog signals and analog modulation types: amplitude modulation, frequency modulation, phase modulation, and Quadrature Amplitude Modulation.

2. What are the various modulation techniques? Begin your explanation with frequency-shift keying and move to multilevel QAM.

3. Provide a specific example of digitizing analog signals in the telephone system. Explain band limiting and quantization noise. Explain the µ law and the A law conversion in the coder-decoder.

4. Explain digital multiplexing, the digital T(X), and SONET hierarchy. Explain the differences between the American and European systems.
Explain digital services such as Integrated Services Digital Network, Switched Multimegabit Data System, and Switch 56.

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1 Analog signals represent continuous data and can vary smoothly over time Amplitude modulation AM a... View the full answer