Subelement A: RADAR Principles – 10 Key Topics – 10 Exam Questions – 8 Drawings— Topic 6: Pulse Width - Pulse Repetition Rates
Question 8-6A2
Element 8 (RADAR)If the pulse repetition frequency (PRF) is 2000 Hz, what is the pulse repetition interval (PRI)?
Explanation
The pulse repetition interval (PRI) is the time duration between the start of one pulse and the start of the next pulse in a pulsed system, such as radar or some digital communication systems. The pulse repetition frequency (PRF) is the number of pulses transmitted per second. These two parameters are inversely related.
To find the PRI, you simply take the reciprocal of the PRF:
PRI = 1 / PRF
Given PRF = 2000 Hz:
PRI = 1 / 2000 seconds
PRI = 0.0005 seconds
Therefore, the correct answer is 0.0005 seconds. The other options result from incorrect calculations of this inverse relationship. For example, 0.005 seconds would correspond to a PRF of 200 Hz, and 0.05 seconds would correspond to a PRF of 20 Hz.
Related Questions
8-5A6 For a range of 10 nautical miles, the RADAR pulse repetition frequency (PRF) should be:8-6A1 If the PRF is 2500 Hz, what is the PRI?8-6A3 The pulse repetition rate (PRR) refers to: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?8-6A5 Small targets are best detected by: