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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 20
6.
In phase shift keying the input signal is
st(t) = A cos ω0t and s2(t) = - A cos ω0t
s1(t) = s2(t) = A cos ω0t
s1(t) = A cos ω0t and s2(t) = A cos (ω0t + p/2)
s1(t) = A cos ω0t and s2(t) = - A (cos ω0t + p/2)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
In figure the output v(t) is
an amplitude modulated signal
a frequency modulated signal
a phase modulated signal
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
If Pk be the probability of the message to be received or transmitted, then the amount of information (Ik) associated, in bits, will be
Ik = log2 Pk
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
A circuit which cannot demodulate SSB is
balanced modulator
product detector
BFO
phase discriminator
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
In TV system in India IF video and IF audio frequencies are
33.4 and 28.4 MHz respectively
38.9 and 33.4 MHz respectively
43.8 and 38.9 MHz respectively
33.4 and 38.9 MHz respectively
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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