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