Key Topic 19: Receiving Systems

Question 1

8-19C1: Which of the following statements is true?

A. The front end of the receiver does not provide any amplification to the RADAR signal.
B. The mixer provides a gain of at least 6 dB.
C. The IF amplifier is always a high gain, narrow bandwidth amplifier.
D. None of the above.

Answer 1

A. The front end of the receiver does not provide any amplification to the RADAR signal.

Question 2

8-19C2: Logarithmic receivers:

A. Can’t be damaged.
B. Can’t be saturated.
C. Should not be used in RADAR systems.
D. Have low sensitivity.

Answer 2

B. Can’t be saturated.

Question 3

8-19C3: RADAR receivers are similar to:

A. FM receivers.
B. HF receivers.
C. T.V. receivers.
D. Microwave receivers.

Answer 3

D. Microwave receivers.

Question 4

8-19C4: What section of the receiving system sends signals to the display system?

A. Video amplifier.
B. Audio amplifier.
C. IF Amplifier.
D. Resolver.

Answer 4

A. Video amplifier.

Question 5

8-19C5: What is the main difference between an analog and a digital receiver?

A. Special amplification circuitry.
B. The presence of decision circuitry to distinguish between “on” and “off” signal levels.
C. An AGC stage is not required in a digital receiver.
D. Digital receivers produce no distrotion.

Answer 5

B. The presence of decision circuitry to distinguish between “on” and “off” signal levels.

Question 6

8-19C6: In a RADAR receiver, the RF power amplifier:

A. Is high gain.
B. Is low gain.
C. Does not exist.
D. Requires wide bandwidth.

Answer 6

C. Does not exist.