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Subelement A
RADAR Principles
Section 5
Range, Pulse Width, PRF
For a range of 5 nautical miles, the RADAR pulse repetition frequency should be:
  • 16.2 Hz or more.
  • 16.2 MHz or less.
  • 1.62 kHz or more.
  • Correct Answer
    16.2 kHz or less.
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For a range of 100 nautical miles, the RADAR pulse repetition frequency should be:
  • 8.1 kHz or less.
  • Correct Answer
    810 Hz or less.
  • 8.1 kHz or more.
  • 81 kHz or more.
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The minimum range of a RADAR is determined by:
  • The frequency of the RADAR transmitter.
  • The pulse repetition rate.
  • Correct Answer
    The transmitted pulse width.
  • The pulse repetition frequency.
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Short range RADARs would most likely transmit:
  • Correct Answer
    Narrow pulses at a fast rate.
  • Narrow pulses at a slow rate.
  • Wide pulses at a fast rate.
  • Wide pulses at a slow rate.
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For a range of 30 nautical miles, the RADAR pulse repetition frequency should be:
  • 0.27 kHz or less.
  • Correct Answer
    2.7 kHz or less.
  • 27 kHz or more.
  • 2.7 Hz or more.
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For a range of 10 nautical miles, the RADAR pulse repetition frequency (PRF) should be:
  • Correct Answer
    Approximately 8.1 kHz or less.
  • 900 Hz.
  • 18.1 kHz or more.
  • 120.3 microseconds.
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