Key Topic 6: Pulse Width - Pulse Repetition Rates

Question 1

8-6A1: If the PRF is 2500 Hz, what is the PRI?

A. 40 microseconds.
B. 400 microseconds.
C. 250 microseconds.
D. 800 microseconds.

Answer 1

B. 400 microseconds.

Question 2

8-6A2: If th pulse repetition frequency (PRF) is 2000 Hz, what is the pulse repetition interval (PRI)?

A. 0.05 seconds.
B. 0.005 seconds.
C. 0.0005 seconds.
D. 0.00005 seconds.

Answer 2

C. 0.0005 seconds.

Question 3

8-6A3: The pulse repetition rate (PRR) refers to:

A. The reciprocal of the duty cycle.
B. The pulse rate of the local oscillator tube.
C. The pulse rate of the klystron.
D. The pulse rate of the magnetron.

Answer 3

D. The pulse rate of the magnetron.

Question 4

8-6A4: If the RADAR unit has a pulse repetition frequency (PRF) of 2000 Hz and a pulse width of 0.05 microseconds, what is the duty cycle?

A. 0.0001
B. 0.0005
C. 0.05
D. 0.001

Answer 4

A. 0.0001

Question 5

8-6A5: Small targets are best detected by:

A. Short pulses transmitted at a fast rate.
B. Using J band frequencies.
C. Using a long pulse width with high output power.
D. All of these answers are correct.

Answer 5

C. Using a long pulse width with high output power.

Question 6

8-6A6: What is the relationship between pulse repetition rate and pulse width?

A. Higher PRR with wider pulse width.
B. The pulse repetition rate does not change with the pulse width.
C. The pulse width does not change with the pulse repetition rate.
D. Lower PRR with wider pulse width.

Answer 6

D. Lower PRR with wider pulse width.