3-O-091: Components
3-91O1:
The ATR box:
Prevents the received signal from entering the transmitter.
Protects the receiver from strong RADAR signals.
Turns off the receiver when the transmitter is on.
All of the above.
3-91O2:
What is the purpose or function of the RADAR duplexer/circulator? It is a/an:
Electronic switch that allows the use of one antenna for both transmission and reception.
Coupling device that is used in the transition from a rectangular waveguide to a circular waveguide.
Modified length of waveguide that is used to sample a portion of the transmitted energy for testing purposes.
Dual section coupling device that allows the use of a magnetron as a transmitter.
3-91O3:
What device can be used to determine the performance of a RADAR system at sea?
Echo box.
Klystron.
Circulator.
Digital signal processor.
3-91O4:
What is the purpose of a synchro transmitter and receiver?
Transmits the angular position of the antenna to the indicator unit.
Synchronizes the transmitted and received pulse trains.
Prevents the receiver from operating during the period of the transmitted pulse.
Keeps the speed of the motor generator constant.
3-91O5:
Digital signal processing (DSP) of RADAR signals (compared with analog) causes:
Improved weak signal or target enhancement.
Improved display graphics.
Less interference with SONAR systems.
Less interference with other radio communications equipment.
3-91O6:
The component or circuit providing the transmitter output power for a RADAR system is the:
Magnetron.
Thyratron.
SCR.
Klystron.
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Color key:
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● = Unseen
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● = Weak
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● = Review
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● = Learned
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● = Incorrect answer
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