Exercise: Communication Systems

Questions for: Communication Systems

The correct sequence of subsystem in an FM receiver is
A:
mixer, RF amplifier, limiter, IF amplifier, discriminator, audio amplifier
B:
RF amplifier, mixer, IF amplifier, limiter, discriminator, audio amplifier
C:
RF amplifier, mixer, limiter, discriminator, IF amplifier, audio amplifier
D:
mixer, IF amplifier, limiter, audio amplifier, discriminator
Answer: B
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In VHS format diameter of head drum is about
A:
1 m
B:
20 cm
C:
6 cm
D:
1 cm
Answer: C
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While AM has __________ frequencies, FM has __________ number of sidebands.
A:
2, 3
B:
3, 3
C:
3, 5
D:
3, infinite
Answer: D
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Which of the following antennas is not wide band?
A:
Marconi
B:
Helical
C:
Folded dipole
D:
Discone
Answer: A
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The most commonly used system of modulating for telegraphy is
A:
single tone modulation
B:
on-off keying
C:
frequency shift keying
D:
pulse code modulation
Answer: C
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