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E7E - Practical Circuits
Extra Class
Modulation and demodulation: AM, FM, SSB, digital modulation
11 questions
All E0A E1A E1B E1C E1D E1E E1F E2A E2B E2C E2D E2E E3A E3B E3C E4A E4B E4C E4D E4E E5A E5B E5C E5D E6A E6B E6C E6D E6E E6F E7A E7B E7C E7D E7E E7F E7G E7H E8A E8B E8C E8D E9A E9B E9C E9D E9E E9F E9G E9H
E7E01
Which of the following can be used to generate FM phone signals?
E7E02
What is the function of a reactance modulator?
E7E03
What is a frequency discriminator?
E7E04
What is one way to produce a single-sideband phone signal?
E7E05
What is added to an FM speech channel to boost the higher audio frequencies?
E7E06
Why is de-emphasis used in FM communications receivers?
E7E07
What is meant by the term “baseband” in radio communications?
E7E08
What are the principal frequencies that appear at the output of a mixer?
E7E09
What occurs when the input signal levels to a mixer are too high?
E7E10
How does a diode envelope detector function?
E7E11
Which type of detector is used for demodulating SSB signals?