Home / ECE / Satellite Communication :: Section 2

ECE :: Satellite Communication

  1. Regarding TASI which one of the following statements is wrong?

  2. A.
    It snatches the channel in his speech and may allocate it to another speaker needing it.
    B.
    The same speaker is reassigned a channel almost instantly when he speaks again even when the circuit is heavily loaded.
    C.
    It increases the overall utilization of the transmission channel
    D.
    Intercontinental callers sometimes confuse the effects of TASI with the effects of satellite delay.

    View Answer

    Workspace

    Discuss Discuss in Forum


  3. Master control facility (MCF) for INSAT-2 series satellites is located at

  4. A.
    Madras
    B.
    New Delhi
    C.
    Leh
    D.
    Hassan

    View Answer

    Workspace

    Discuss Discuss in Forum


  5. The communication satellite INSAT-IB had to take up the job of INSAT-IA because the latter collapsed within __________ months of its launch.

  6. A.
    12
    B.
    20
    C.
    5
    D.
    36

    View Answer

    Workspace

    Discuss Discuss in Forum


  7. The distance of a synchronous satellite from Earth's surface is __________ km.

  8. A.
    300
    B.
    10000
    C.
    35900
    D.
    5

    View Answer

    Workspace

    Discuss Discuss in Forum


  9. A typical error rate on satellite circuits is one bit error in

  10. A.
    107
    B.
    103
    C.
    102
    D.
    1010

    View Answer

    Workspace

    Discuss Discuss in Forum


  11. In satellite communication, highly directional antennas are used to

  12. A.
    direct the spot beam to a particular region of space on Earth
    B.
    strengthen the beam to overcome the cosmic noise
    C.
    make corrections in change of polarisation of the beam
    D.
    select a particular channel in transmission and reception

    View Answer

    Workspace

    Discuss Discuss in Forum


  13. The average noise temperature of Earth, as viewed from space, is __________ °K.

  14. A.
    254
    B.
    303
    C.
    100
    D.
    500

    View Answer

    Workspace

    Discuss Discuss in Forum


  15. Low-orbit satellites are not used for communications because they

  16. A.
    produce sonic booms
    B.
    do not provide 24 hour/ day contact to the users on Earth
    C.
    heat up and melt
    D.
    none

    View Answer

    Workspace

    Discuss Discuss in Forum


  17. After the death of INSAT-IB, the mainstay of the entire Indian satellite network for some time to come would be

  18. A.
    INSTELSAT-V
    B.
    INSAT-ID
    C.
    INSAT-2
    D.
    ARABSAT

    View Answer

    Workspace

    Discuss Discuss in Forum


  19. Which statement out of the following statement is wrong?

  20. 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

    View Answer

    Workspace

    Discuss Discuss in Forum