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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 25
6.
For telegraphy the most commonly used modulation system is
FSK
two tone modulation
PCM
single tone modulation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
Commercial Frequency deviation of FM is
70 kHz
75 kHz
80 kHz
65 kHz
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
The colour of an object is decided by
the reflected colour
the wavelength transmitted through it
reflected colour for opaque object and wavelength transmitted through it for transparent objects
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
In Pulse Code Modulation system
large bandwidth is required
quantising noise can be overcome by companding
quantising noise can be reduced by decreasing the number of standard levels
suffers from the disadvantage of its incompatibly with TDM
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
Waveform shown in figure is that for
FM
PCM
AM-DSB
AM-SSB
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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