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31. If the PRF is 2500 Hz, what is the PRI?
The Pulse Repetition Interval (PRI) is the reciprocal of the Pulse Repetition Frequency (PRF). Therefore, PRI = 1 / PRF. Given a PRF of 2500 Hz, the PRI is 1 / 2500 seconds, which equals 0.0004 seconds. Converting to microseconds, 0.0004 seconds * 1,000,000 microseconds/second = 400 microseconds.
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