Exercise: Communication Systems

Questions for: Communication Systems

The colour of an object is decided by
A:
the reflected colour
B:
the wavelength transmitted through it
C:
reflected colour for opaque object and wavelength transmitted through it for transparent objects
D:
none of the above
Answer: C
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Commercial Frequency deviation of FM is
A:
70 kHz
B:
75 kHz
C:
80 kHz
D:
65 kHz
Answer: B
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For telegraphy the most commonly used modulation system is
A:
FSK
B:
two tone modulation
C:
PCM
D:
single tone modulation
Answer: A
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If S represents the carrier synchronization at the receiver and r represents the bandwidth efficiency, then the correct statement for the coherent binary PSK is
A:
r = 0.5, S is required
B:
r = 1.0, S is required
C:
r = 0.5, S is not required
D:
r = 1.0, S is not required
Answer: D
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An FM radio receiver which is tuned to a 91.6 MHz broadcast station may receive an image frequency of __________ MHz.
A:
102.3
B:
113
C:
70.2
D:
80.9
Answer: B
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