Electronics and Communication Engineering - Communication Systems

1. 

Which of following digital modulation technique?

A. ASK
B. FSK
C. PSK
D. All

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

2. 

A discrete zero memory information source has 40 symbols and each symbol is equally likely. The minimum number of bits required to code the source with uniform length code and entropy of the source are

A. 5 and 5.03
B. 6 and 5.83
C. 5 and 6.64
D. 6 and 5.32

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

3. 

The standard intermediate frequency for FM ratio is

A. 10.7 MHz
B. 4.5 MHz
C. 75 kHz
D. 455 kHz

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

4. 

In an end fire array, the radiation pattern

A. is in the plane of array
B. is at right angles to array
C. is at an angle to the plane of array
D. either (b) or (c)

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

5. 

Armstrong FM transmitter uses

A. LC oscillator
B. crystal oscillator
C. RC oscillator
D. either (a) or (c)

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

1 2 3 4 5 6 7 8 9 10 Next »