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 artefacts near vertical edges.