Method and apparatus for detecting a dead zone in the...

Details Method and apparatus for detecting a dead zone in the... Method and apparatus for detecting a dead zone in the...

H - Electricity

04

N

350/1, 352/18

H04N 17/06 (2006.01)

Patent

CA 1265866

Abstract A dead zone in the transfer function of a signal processing system, such as a VTR, is detect- ed by impressing on the system a test signal that is formed within a predetermined interval from a sinusoidal waveform modulated by an envelope func- tion that reduces to zero at a predetermined time. The existence of the dead zone is detected by observing whether the corresponding output signal of the signal processing system has a constant ampli- tude at times other than the time at which the envelope function is zero.

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