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Subelement A
RADAR Principles
Section 1
Marine RADAR Systems
Choose the most correct statement containing the parameters which control the size of the target echo.
  • Transmitted power, antenna effective area, transmit and receive losses, RADAR cross section of the target, range to target.
  • Height of antenna, power radiated, size of target, receiver gain, pulse width.
  • Power radiated, antenna gain, size of target, shape of target, pulse width, receiver gain.
  • Magnetron gain, antenna gain, size of target, range to target, wave-guide loss.
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Which of the following has NO effect on the maximum range capability?
  • Carrier frequency.
  • Recovery time.
  • Pulse repetition frequency.
  • Receiver sensitivity.
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What type of transmitter power is measured over a period of time?
  • Average.
  • Peak.
  • Reciprocal.
  • Return.
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What RADAR component controls timing throughout the system?
  • Power supply.
  • Indicator.
  • Synchronizer.
  • Receiver.
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Which of the following components allows the use of a single antenna for both transmitting and receiving?
  • Mixer.
  • Duplexer.
  • Synchronizer.
  • Modulator.
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The sweep frequency of a RADAR indicator is determined by what parameter?
  • Carrier frequency.
  • Pulse width.
  • Duty cycle.
  • Pulse repetition frequency.
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