Exercise: Communication Systems

Questions for: Communication Systems

The FM broadcast band is from
A:
550 to 1600 kHz
B:
88 to 108 kHz
C:
88 to 108 MHz
D:
1600 kHz to 59.75 MHz
Answer: C
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In SSB generation, the most commonly used filter is
A:
low pass
B:
RC
C:
LC
D:
mechanical
Answer: D
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A linear diode detector uses RC filter. As modulation index increases the maximum permissible value of time constant RC
A:
increases
B:
decreases
C:
remains constant
D:
either (a) or (c)
Answer: B
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Which of the following can provide two or more voice circuits with the same carrier?
A:
SSB
B:
Carrier reinsertion
C:
Lincompex
D:
Independent side band system
Answer: B
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In FM and AM the ratio of signal to noise ratio at the detector output least depends upon
A:
bandwidth
B:
transmission
C:
carrier frequency
D:
modulating frequency
Answer: C
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