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coherent oscillator[kō′hir·ənt ′äs·ə‚lād·ər]
An oscillator used in moving-target indicator radar to serve as a reference by which changes in the radio-frequency phase of successively received pulses may be recognized. Abbreviated coho.
An oscillator, in MTI (moving target indicator) radars, providing a coherent reference by which the radio frequency phase of a received pulse may be compared with that of a transmitted pulse.