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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 15
21.
At FM demodulator output noise power density
increases with frequency
decreases with frequency
remains unaltered
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
According to CCIR standards, the Vestigial Sideband (VSB)
video frequencies upto 4 MHz are transmitted
video frequencies upto 5 MHz are transmitted
video frequencies upto 5.5 MHz are transmitted
video frequencies upto 6 MHz are transmitted
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
Line of sight transmission is used in
radio frequencies below 1 MHz
VHF only
audio signals only
VHF and UHF
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
A typical value of insertion loss of SAW filter is
15 dB
2 dB
40 dB
60 dB
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
In phase modulation, the phase deviation is
proportional to the amplitude of the signal and varies with frequency
remains constant while amplitude and frequency of signal varies
proportional to the amplitude of the signal and independent of the frequency
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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