What happens to wave distance when PRF is fast?

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Multiple Choice

What happens to wave distance when PRF is fast?

When PRF is increased, the time between transmitted pulses becomes shorter. Echoes from targets must be received before the next pulse is sent to avoid ambiguity. The maximum unambiguous range is set by the condition 2R/c < T, where T is the pulse period (T = 1/PRF). Solving gives Rmax = c/(2·PRF). So increasing PRF reduces this unambiguous range, meaning the effective “wave distance” that can be resolved without ambiguity decreases. Higher PRF improves update rate and trackability but at the cost of a smaller unambiguous range.

When PRF is increased, the time between transmitted pulses becomes shorter. Echoes from targets must be received before the next pulse is sent to avoid ambiguity. The maximum unambiguous range is set by the condition 2R/c < T, where T is the pulse period (T = 1/PRF). Solving gives Rmax = c/(2·PRF). So increasing PRF reduces this unambiguous range, meaning the effective “wave distance” that can be resolved without ambiguity decreases. Higher PRF improves update rate and trackability but at the cost of a smaller unambiguous range.

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