IndiaBIX

Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 11
36.

Assertion (A): A video monitor does not need RF tuner and IF amplifier

Reason (R): The picture tube in TV is basically a CRT.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is correct but R is wrong
A is wrong but R is correct
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
Consider the following statements as regards IF in radio receivers
  1. If IF is too high, poor selectivity and poor adjacent channel rejection could result
  2. If IF is high, tracking difficulties increase
  3. A very low IF makes selectivity too sharp
  4. As IF is decreased, image frequency rejection becomes better
Which of the above are correct?
1, 2, 3, 4
1, 2, 3
2, 3, 4
1, 3, 4
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
Audio-signal modulates a 125 MHz carrier, causing a frequency deviation of 5 kHz. The bandwidth of the narrowband FM signal is __________ kHz.
10
8
9
20
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.

Assertion (A): Radar gave birth to microwave technology.

Reason (R): In radar systems very high frequencies give the most accurate results.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is correct but R is wrong
A is wrong but R is correct
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
A channel has a SNR of 7 and BW 4 kHz. Keeping the channel capacity (BPS) same, the BW is reduced to accommodate more channels. The SNR
decreases
increases
remains same
partially affected
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers