solution
solution.
1. Define modulation
2. Explain why modulation is necessary or desirable.
3. True or false? The carrier frequency is usually lower than the modulating frequency 4. What is the basic circuit used to produce preemphasis?
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6. Define what is meant by antenna reciprocity
7. What is the length of a dipole?
8. Name the three basic elements in a Yagi antenna.
9. State in your own words the relationship between Q and the bandwidth of a tuned circuit.
10. What kind of filter is used to select a single signal frequency from many signals? 11. What is the name of the circuit used to eliminate the carrier in DSB/SSB transmissions? 12. Does the carrier of an AM signal contain any information? Explain.
13. What percentage of the total power in an AM signal is in the carrier? One sideband? Both sidebands?
14. Name the type of AM used in TV picture transmission.
15. Write the formulae for Noise Ratio and Noise Figure.
16. In what units is the signal-to-noise (S/N) ratio usually expressed?
17. Name the three types of semiconductor noise.
18. What determines the selectivity of a receiver?
19. What are the main components of a tuned circuit?
20. State the types of Filters.
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