Electronics and Communication Engineering - Communication Systems

1.
Which of the following microphones has bidirectional feature?
Moving coil
Ribbon
Condenser
Carbon
Answer: Option
Explanation:
No answer description is available. Let's discuss.

2.
In TV transmitter some possible advantages of IF modulation are
  1. The modulator section and visual exciter can be solid state devices
  2. VSB filter can be introduced at low power level
  3. The subsequent stages following VSB filter can be tuned permanently for wideband linear operation
  4. It is economical
which of the above are true?
1 and 2
1, 2 and 3
2, 3 and 4
1, 2, 3 and 4
Answer: Option
Explanation:
No answer description is available. Let's discuss.

3.
A source is radiating power equally in all directions. If source power is P, the power density at distance d is
Answer: Option
Explanation:
No answer description is available. Let's discuss.

4.
As compared to AM, FM requires
narrow channel
same channel
2 to 3 times as large channel
7 to 15 times as large channel
Answer: Option
Explanation:
No answer description is available. Let's discuss.

5.
Capture effect occurs in
AM
FM
PCM
QAM
Answer: Option
Explanation:
No answer description is available. Let's discuss.