📝 Aspects of Digital to Analog Conversion during Analog Transmission

Q1. Which of the following is NOT one of the three fundamental characteristics of a sine wave used in digital-to-analog modulation?

💡 Difficulty: easy | ✅ Correct: C

Q2. If amplitude modulation represents a digital \1\ with high amplitude and a \0\ with zero amplitude, and the data stream contains equal numbers of \1\s and \0\s, what happens to the average output power?

💡 Difficulty: medium | ✅ Correct: B

Q3. In a phase‑modulated DAC, a uniform phase error of \( \theta \) radians occurs for each symbol. How does this error influence the bit‑error probability compared with an ideal system?

💡 Difficulty: hard | ✅ Correct: B