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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 9
36.
In a low level amplitude modulated system, the amplifier modulated stage must be
class C
linear
non linear
harmonic
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
A noise can be represented as superposition of spectral components. When this noise is passed through a narrow band filter, the output of filter should look like
sinusoidal
rectangular
triangular
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
A narrow band noise show
AM only
AM and FM
FM
PCM
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
The upper and lower side frequencies for 3 kHz audio modulation with a 27 MHz carrier frequency will be
30 and 24 MHz
27.3 and 26.7 MHz
27.3 and 26.97 MHz
27.3 and 26.97 MHz
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
Consider the following advantages of phase array radar
  1. simple circuitry
  2. ability to track and scan simultaneously
  3. ability to track many targets together
  4. very fast scanning
Which of the above are correct?
1, 2, 3
1, 3, 4
2, 3, 4
1, 4 only
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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