1. What type of signal is represented by the code 15A3?
2. Briefly explain the difference between phase and frequency modulation.
3. 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.
4. 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?
5. What is the sensitivity of an FM receiver with a 100 mV quieting voltage and a voltage gain of 50,000?
6. Consider phase locked-loop FM demodulation. What is the meaning of the term hold-in range?
7. Name the 3 possible states of operation for a phase locked-loop.
8. 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.