单选题When you turn on the fast time constant (differentiator) control of a radar it will（）.Aenhance weak target echoes and brighten them on the PPIBreduce clutter over the entire PPI by shortening the echoesConly suppress weak targets to a limited distance from the ship (sea clutter)Dreduce the beam width to provide a map-like presentation for navigation
单选题
When you turn on the fast time constant (differentiator) control of a radar it will（）.
A
enhance weak target echoes and brighten them on the PPI
B
reduce clutter over the entire PPI by shortening the echoes
C
only suppress weak targets to a limited distance from the ship (sea clutter)
D
reduce the beam width to provide a map-like presentation for navigation
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