Z3D153 Vol3 Unit 2

11 Questions | Total Attempts: 123

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Network Quizzes & Trivia

Multichannel Satellite Principles.


Questions and Answers
  • 1. 
    What is multiplexing? 
    • A. 

      Transmitting one signal over multiple transmission paths.

    • B. 

      Transmitting one signal multiple times over a single transmission path.

    • C. 

      Combining multiple information channels onto a common transmission medium.

    • D. 

      Combining multiple signals for transmission over separate, individual transmission paths.

  • 2. 
    What specifically does wavelength division multiplexing assign each incoming optical signal?
    • A. 

      Pseudorandom code.

    • B. 

      Frequency of light.

    • C. 

      Radio frequency.

    • D. 

      Time slot.

  • 3. 
    Which multiplexing division technique samples each low speed channel in sequence to interleave bits or characters and then transmit them at high speed?
    • A. 

      Wavelength.

    • B. 

      Frequency.

    • C. 

      Code.

    • D. 

      Time.

  • 4. 
    Which of the following relies on the transmitter to send multiple copies of the same message to the distant end using a predetermined algorithm?
    • A. 

      Controlled diphase.

    • B. 

      Non-return to zero.

    • C. 

      Forward error correction.

    • D. 

      Quadrature phase shift keying (QPSK).

  • 5. 
    Which SATCOM system module is used to produce the final transmit frequency?
    • A. 

      Up converter.

    • B. 

      Modulator.

    • C. 

      Amplifier.

    • D. 

      Antenna.

  • 6. 
    Which type of power amplifier uses semiconductor transistors designed for microwave and higher frequency RF operation?
    • A. 

      Klystron.

    • B. 

      Solid state.

    • C. 

      Traveling wave tube amplifier.

    • D. 

      Metal oxide field-effect transistor (MOSFET).

  • 7. 
    Which module is the first step of the receive signal path?
    • A. 

      Low noise amplifier.

    • B. 

      Down converter.

    • C. 

      Up converter.

    • D. 

      Demodulator.

  • 8. 
    Which module strips away the intelligence from the Intermediate frequency?
    • A. 

      Low noise amplifier.

    • B. 

      Down converter.

    • C. 

      Up converter.

    • D. 

      Demodulator.

  • 9. 
    When establishing a communication link with a satellite the required sequence of events is?
    • A. 

      Frequency acquisition, space acquisition, antenna pointing, and satellite tracking.

    • B. 

      Satellite acquisition, satellite tracking, power correction, and antenna pointing.

    • C. 

      Orbit prediction, antenna pointing, satellite acquisition, and satellite tracking.

    • D. 

      Orbit prediction, space acquisition, and frequency acquisition

  • 10. 
    Which tracking method requires no input from a satellite?
    • A. 

      Programmed track.

    • B. 

      Automatic track.

    • C. 

      Pseudoconscan.

    • D. 

      Step track.

  • 11. 
    What signal originating from the satellite do we use to acquire and track the satellite?
    • A. 

      Beacon.

    • B. 

      Telemetry.

    • C. 

      Ephemeris.

    • D. 

      Communication.

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