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.
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Correct AnswerTransmitted power, antenna effective area, transmit and receive losses, RADAR cross section of the target, range to target.
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Height of antenna, power radiated, size of target, receiver gain, pulse width.
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Power radiated, antenna gain, size of target, shape of target, pulse width, receiver gain.
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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?
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Carrier frequency.
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Correct AnswerRecovery time.
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Pulse repetition frequency.
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Receiver sensitivity.
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What type of transmitter power is measured over a period of time?
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Correct AnswerAverage.
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Peak.
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Reciprocal.
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Return.
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What RADAR component controls timing throughout the system?
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Power supply.
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Indicator.
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Correct AnswerSynchronizer.
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Receiver.
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Which of the following components allows the use of a single antenna for both transmitting and receiving?
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Mixer.
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Correct AnswerDuplexer.
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Synchronizer.
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Modulator.
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The sweep frequency of a RADAR indicator is determined by what parameter?
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Carrier frequency.
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Pulse width.
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Duty cycle.
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Correct AnswerPulse repetition frequency.
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