Key Topic 16: TR - ATR - Circulators - Directional Couplers-2

Question 1

8-16B1: The ATR box:

A. Protects the receiver from strong RADAR signals.
B. Prevents the received signal from entering the transmitter.
C. Turns off the receiver when the transmitter is on.
D. All of the above.

Answer 1

B. Prevents the received signal from entering the transmitter.

Question 2

8-16B2: When a pulse RADAR is radiating, which elements in the TR box are energized?

A. The TR tube only.
B. The ATR tube only.
C. Both the TR and ATR tubes.
D. Neither the TR nor ATR tubes.

Answer 2

C. Both the TR and ATR tubes.

Question 3

8-16B3: The TR box:

A. Prevents the received signal from entering the transmitter.
B. Protects the receiver from the strong RADAR pulses.
C. Turns off the receiver when the transmitter is on.
D. Protects the receiver from the strong RADAR pulses and mutes the receiver when the transmitter is on.

Answer 3

D. Protects the receiver from the strong RADAR pulses and mutes the receiver when the transmitter is on.

Question 4

8-16B4: What device is located between the magnetron and the mixer and prevents received signals from entering the magnetron?

A. The ATR tube.
B. The TR tube.
C. The RF attenuator.
D. A resonant cavity.

Answer 4

A. The ATR tube.

Question 5

8-16B5: A keep-alive voltage is applied to:

A. The crystal detector.
B. The ATR tube.
C. The TR tube.
D. The magnetron.

Answer 5

C. The TR tube.

Question 6

8-16B6: A DC keep-alive potential:

A. Is applied to a TR tube to make it more sensitive.
B. Partially ionizes the gas in a TR tube, making it very sensitive to transmitter pulses.
C. Fully ionizes the gas in a TR tube.
D. Is applied to a TR tube to make it more sensitive and partially ionizes the gas in a TR tube.

Answer 6

D. Is applied to a TR tube to make it more sensitive and partially ionizes the gas in a TR tube.