Short Time Linear Distortions
Short Time Linear Distortions – These distortions cause amplitude changes, ringing, overshoot and undershoot in fast rise times and 2T pulses. The affected signal components range in duration from 125 nsec to 1 µsec. A 1T pulse must be used to test for these distortions. See the discussion on Linear Distortions. Errors are expressed in “percent-SD”. The presence of distortions in short time domain can also be determined by measuring K2T or Kpulse/bar. See the discussion on K Factor. Picture effects include fuzzy vertical edges. Ringing will sometimes generate chrominance artifacts near vertical edges.
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