Discussion
Home ‣ Electronics and Communication Engineering ‣ Satellite Communication Comments
- Question
Rotation of a geosynchronous satellite means its
Options- A. drift from stationary position
- B. wobbling
- C. three-axis stabilization
- D. three-dimensional stabilization
- Correct Answer
- wobbling
- 1. Of the four INSAT-I satellites planned by India so for, only __________ has proved to be successful.
Options- A. INSAT-IA
- B. INSAT-IB
- C. INSAT-IC
- D. INSAT-ID Discuss
- 2. Which one of the following statements regarding compandor is FALSE?
Options- A. It compresses the higher-amplitude parts of a signal before modulation and expands them back to normal again after demodulation.
- B. It gives preferential treatment to the weaker parts of the signal
- C. For weaker signals it gives a poor ratio of signal strength to quantizing error
- D. Weaker signals, traverse more quantum steps than they would do otherwise and so quantizing error is reduced. Discuss
- 3. The first geostationary satellite launched in 1965 was called
Options- A. ANIK
- B. EARLY BIRD (Intelsat-I)
- C. WESTAR
- D. MOLNIYA Discuss
- 4. The Sun blots out the transmission of a geosynchronous satellite twice a year when satellite passes directly in front of it. This outage lasts for about
Options- A. 10 minutes on 5 consecutive days
- B. 5 minutes on 10 consecutive days
- C. 30 minutes for 5 consecutive days
- D. one hour for 5 consecutive days Discuss
- 5. While keeping the down-link frequency constant, the diameter of a satellite antenna is reduced by half. To offer the same EIRP over the increased coverage area, the RF output power has to be increases by a factor of
Options- A. 2
- B. 4
- C. 8
- D. 16 Discuss
- 6. A geostationary satellite is one which
Options- A. hangs motionless in space about 36000 km about Earth
- B. travels around the Earth in 24 hours
- C. remains stationary above the Earth
- D. appears stationary to everybody on Earth Discuss
- 7. India's first domestic geostationary satellite 1NSAT-IA was launched on 10th April 1982 from
Options- A. USSR
- B. USA
- C. UK
- D. UP Discuss
- 8. Radio broadcasting is a familiar example of
Options- A. space multiplexing
- B. time multiplexing
- C. frequency multiplexing
- D. none of the above Discuss
- 9. The present total cost per watt of power generation in geosynchronous orbit is nearly Rs.
Options- A. 20
- B. 50
- C. 100
- D. 5 Discuss
- 10. A function having frequency f is to be sampled. The sampling time T should be
Options- A.
- B.
- C.
- D.
Discuss
Satellite Communication problems
Search Results
Correct Answer: INSAT-IB
Correct Answer: For weaker signals it gives a poor ratio of signal strength to quantizing error
Correct Answer: EARLY BIRD (Intelsat-I)
Correct Answer: 10 minutes on 5 consecutive days
Correct Answer: 4
Correct Answer: appears stationary to everybody on Earth
Correct Answer: USA
Correct Answer: frequency multiplexing
Correct Answer: 20
Correct Answer:
Explanation:
Sampling frequency must be more than 2f. Therefore 
.
.
Comments
There are no comments.More in Electronics and Communication Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.