TWO-T (2T) PULSE
A sine-squared test pulse for video equipment measurement, with its frequency characteristics covering the bandwidth of the signal. The distortion of this pulse created by the video amplifier or processor is measured in \''K\'' units or factor, and should be as close to zero as possible. This test signal easily detects the non-linearity of video devices which results in spurious effects, signal overshoots, ringing etc, due to group delay effects.
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