Assignment:
- What type of signal is represented by the code 15A3?
- Briefly explain the difference between phase and frequency modulation.
- A 15 mV sinusoid with input frequency 450 Hz is applied to an FM generator with k = 1000 Hz/20 mV. Find the positive frequency deviation.
- An FM signal is given by e = 40 sin (2ƒÎ ~106t + 10 sin 600 ƒÎt). What is the carrier frequency? What is the modulation index?
- An FM signal 400 sin (2ƒÎ ~108t + 8 sin 200 ƒÎt) is applied to a 100 ƒ¶ antenna. What is the transmitted power?
- The maximum deviation in broadcast FM is 75 kHz. Suppose that a commercial FM system has modulating frequencies 40 Hz to 20 kHz. What is the permissible range for the modulation index?
- What is the sensitivity of an FM receiver with a 100 mV quieting voltage and a voltage gain of 50,000?
- Consider phase locked-loop FM demodulation. What is the meaning of the term hold-in range?
- Name the 3 possible states of operation for a phase locked-loop.
- An FM station transmits at 96.5 MHz. Find the local oscillator frequency and image frequency if the receiver has a 10.7 MHz IF. P294
Provide complete and step by step solution for the question and show calculations and use formulas.