Discussion
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- Question
The lowest frequency used in satellite communications is __________ GHz.
Options- A. 0.8
- B. 3
- C. 18
- D. 30
- Correct Answer
- 0.8
- 1. 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
- 2. 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
- 3. The noise temperature of sky is about __________ °K.
Options- A. 100
- B. 273
- C. 0
- D. 30 Discuss
- 4. The average noise temperature of Earth, as viewed from space, is __________ °K.
Options- A. 254
- B. 303
- C. 100
- D. 500 Discuss
- 5. 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
- 6. A typical error rate on satellite circuits is one bit error in
Options- A. 107
- B. 103
- C. 102
- D. 1010 Discuss
- 7. 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
- 8. A colour television signal having bandwidth of 4.6 MHz is digitised using 10 bits sample. The digital bit rate used for its transmission with PCM would be __________ kilobits/second.
Options- A. 92000
- B. 920
- C. 23000
- D. 230 Discuss
- 9. Assuming earth to be a sphere of radius 6400 km and height of a geosynchronous satellite above Earth as 36000 km, the velocity of a geosynchronous satellite is __________ km/hr.
Options- A. 28000
- B. 15000
- C. 36000
- D. 11100 Discuss
- 10. Which statement out of the following statement is wrong?
Options- A. Attenuation of satellite signals by rain and fog varies almost inversely with the angle of elevation
- B. At 12/4, GHz link frequencies, signal power loss due to rain and fog is much greater than at 4/6 GHz frequencies
- C. The distance between satellite and Earth station varies slightly with angle of elevation
- D. At present 4/6 GHz geostationary satellites are being parked in geosynchronous, orbits at least 10° apart Discuss
Satellite Communication problems
Search Results
Correct Answer: codec
Correct Answer: both (b) and (c)
Correct Answer: 30
Correct Answer: 254
Correct Answer: coverage a sea
Correct Answer: 107
Correct Answer: global communication
Correct Answer: 92000
Correct Answer: 11100
Correct Answer: At present 4/6 GHz geostationary satellites are being parked in geosynchronous, orbits at least 10° apart
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