Discussion
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- Question
The noise temperature of sky is about __________ °K.
Options- A. 100
- B. 273
- C. 0
- D. 30
- Correct Answer
- 30
- 1. The average noise temperature of Earth, as viewed from space, is __________ °K.
Options- A. 254
- B. 303
- C. 100
- D. 500 Discuss
- 2. In selecting a satellite system, the First determining factor is its
Options- A. EIRP
- B. antenna size
- C. coverage a sea
- D. antenna gain Discuss
- 3. Shannon's Law relates
Options- A. antenna gain to frequency
- B. noise power to bandwidth
- C. information-carrying capacity to S/N ratio
- D. transmission losses to noise Discuss
- 4. The life time of a geosynchronous communication
Options- A. 5
- B. 10
- C. 20
- D. 50 Discuss
- 5. The degradation of satellite solar cells with time is mainly due to
Options- A. their bombardment by electrons
- B. collection of meteoric dust
- C. increase in resistivity of silicon
- D. gradual leakage of charge carriers from the semiconductor material Discuss
- 6. The 1150 kg geosynchronous satellite INSAT-IA parked 36000 km above India had greatly improved India's
Options- A. intelligence gathering capacity
- B. domestic communications
- C. meteorological capability
- D. both (b) and (c) Discuss
- 7. For satellite transmission, analog signals may be converted into digital form with the help of
Options- A. modem
- B. transponder
- C. codec
- D. compandor Discuss
- 8. The lowest frequency used in satellite communications is __________ GHz.
Options- A. 0.8
- B. 3
- C. 18
- D. 30 Discuss
- 9. A typical error rate on satellite circuits is one bit error in
Options- A. 107
- B. 103
- C. 102
- D. 1010 Discuss
- 10. Geosynchronous satellites are always launched in the equatorial plane because it is the only plane which provides
Options- A. 24-hour orbit
- B. stationary satellite
- C. global communication
- D. zero-gravity environs Discuss
Satellite Communication problems
Search Results
Correct Answer: 254
Correct Answer: coverage a sea
Correct Answer: noise power to bandwidth
Correct Answer: 10
Correct Answer: their bombardment by electrons
Correct Answer: both (b) and (c)
Correct Answer: codec
Correct Answer: 0.8
Correct Answer: 107
Correct Answer: global communication
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