Key Topic 32: Fixed Range Markers

Question 1

8-32D1: Accurate range markers must be developed using very narrow pulses. A circuit that could be used to provide these high-quality pulses for the CRT is a:

A. Ringing oscillator.
B. Monostable multivibrator.
C. Triggered bi-stable multivibrator.
D. Blocking oscillator.

Answer 1

D. Blocking oscillator.

Question 2

8-32D2: Range markers are determined by:

A. The CRT.
B. The magnetron.
C. The timer.
D. The video amplifier.

Answer 2

C. The timer.

Question 3

8-32D3: A gated LC oscillator, operating at 27 kHz, is being used to develop range markers. If each cycle is converted to a range mark, the range between markers will be:

A. 3 nautical miles.
B. 6 nautical miles.
C. 8 nautical miles.
D. 12 nautical miles.

Answer 3

A. 3 nautical miles.

Question 4

8-32D4: What would be the frequency of a range ring marker oscillator generating range rings at 10 nautical miles intervals?

A. 24 kHz.
B. 16 kHz.
C. 12 kHz.
D. 8 kHz.

Answer 4

D. 8 kHz.

Question 5

8-32D5: What is the distance between range markers if the controlling oscillator is operating at 20 kHz?

A. 1 nautical mile.
B. 2 nautical miles.
C. 4 nautical miles.
D. 8 nautical miles.

Answer 5

C. 4 nautical miles.

Question 6

8-32D6: What would be the frequency of a range ring marker oscillator generating range rings at intervals of 0.25 nautical miles?

A. 161 kHz.
B. 322 kHz.
C. 644 kHz.
D. 1288 kHz.

Answer 6

B. 322 kHz.