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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 23
36.
The antenna current of an AM transmitter is 8 A. When only the carrier is sent, but it increases to 8.93 A. when the carrier is sinusoidally modulated. The percentage modulation is nearly
90%
80%
75%
70%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
In digital TV digital imaging standard comprises
six profiles and four levels
four levels and six profiles
six profiles and six levels
four profiles and four levels
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
The 2 out of 5 code has
two 0s and three 0s in each code group
one 1s and four 0s in each code group
four 1s and one 0s in each code group
three 1s and two 0s in each code group
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
Consider the following statements as regards BPSK and QPSK:
  1. In BPSK we deal individually with each bit of duration Tb
  2. In QPSK we lump two bits to form a symbol
  3. In both BPSK and QPSK signal changes occur at bit rate
  4. In QPSK the symbol can have any one of four possible values
Which of the above statements are correct?
1, 2, 3, 4
1, 2, 3
1, 2, 4
2, 3, 4
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
In equally tampered musical scale, an octave is divided into
12 intervals
10 intervals
7 intervals
5 intervals
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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