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ECE :: Satellite Communication

  1. ______ is the rotation of the vehicle about its vertical axis
  2. A.
    Propellent
    B.
    Transponder
    C.
    Payload
    D.
    Yaw

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  3. In which of the following, Overlap occurs between channels, but these are alternatively polarized left hand circular and right hand circular to reduce interference to acceptable levels.
  4. A.
    S/N ratio
    B.
    frequency reuse
    C.
    Polarization Interleaving
    D.
    none of these

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  5. Noise power per unit Bandwidth is known as
  6. A.
    Noise power spectral density
    B.
    Power spectral density
    C.
    Auto spectral density
    D.
    Energy spectral density

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  7. Intermodulation distortion in high power amplifier can result in signal product which appear as noise and it is known as
  8. A.
    Intermodulation distortion
    B.
    Intermodulation noise
    C.
    noise power spectral density
    D.
    noise weightening

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  9. ___Which of the following term is used to describe the microwave radiation which is present throughout universe and appears to originate from matter in any form at a finite temperature.
  10. A.
    Noise factor
    B.
    Antenna loss
    C.
    Sky noise
    D.
    Noise power spectral density

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  11. What is meant by TWTA ?
  12. A.
    Travelling wave travelling amplifier
    B.
    Travelling wave tube amplifier
    C.
    Tube wave travelling amplifier
    D.
    None of these

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  13. What is meant by OMT ?
  14. A.
    Orthogonal mode tube
    B.
    Orthogonal modulation tube
    C.
    Orthogonal mode transducer
    D.
    none of these

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  15. Which of the following comes under methods of multiple access techniques?
  16. A.
    FDMA & TDMA
    B.
    SCPC & CDMA
    C.
    CDMA & GSM
    D.
    none of these

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  17. What is meant by CDMA?
  18. A.
    Code division modulation access
    B.
    Code division multiple amplifier
    C.
    Code division multiple access
    D.
    none of these

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  19. What is meant by SCPC?
  20. A.
    Single channel per carrier
    B.
    Single carrier per channel
    C.
    Single code per channel
    D.
    none of these

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