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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 23
31.
In a superheterodyne broadcast receiver, the frequency of local oscillator is __________ the incoming signal frequency.
higher than
lower than
equal to
not comparable to
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
PAL stands for
Phase Attenuation by Line
Phase Alternation by Line
Parabolic Alternation by Line
Picture Alternation by Line
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
In free space, line of sight propagation case, the transmission losses between transmitter and receiver increase with frequency (f) as
f
f2
f4
f1/2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
A sinusoidal carrier voltage, having frequency 1000 Hz is amplitude modulated by a sinusoidal voltage of frequency 15 kHz. The frequency of upper and lower sidebands will be
1015 kHz and 985 kHz
1030 kHz and 970 kHz
13 kHz and 17 kHz
14 kHz and 16 kHz
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
PCM : Quantising Noise :: Transistor :
Partition noise
Shot noise
Whirl
No noise
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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