Problem Sheet 2 Amplitude Modulation Reminder Relevant Formulas Max Maxmin Modulation Inde Q29225968

Some of the answers are in the last picture


Problem Sheet 2- Amplitude Modulation – AM Reminder of relevant formulas: max A maxmin Modulation index ??f Envelope detector time constant: /m?? Power efficiency Single tone AM signal 1+m2 Q1. An AM (DSB-LC) transmitter radiates a total power of 200 KV. If the depth of modulation is 70%, what is the carrier power? 02. 5v 2v Figure 1 The message modulating the AM signal in Figure 1 is a single-tone signal of frequency 5 kHz. Find the carrier frequency. Referring to Figure 1 above, calculate the modulation index. What percentage of the total power of this AM signal is contained within the sidebands? Sketch the spectrum of this AM signal, and explain why this form of modulation is also referred to as DSB-LC Suggest a value for the time constant RC in an envelope detector used to recover the original message. a) b) c) d) e) 193 Show transcribed image text