Distortions involving signals in the 1 μsec to 64 μsec range. These distortions cause tilt in line-rate signal components such as white bars. The amount of distortion is expressed in IRE or as a percent of the line bar amplitude. Line time distortions can also be quantified in Kbar units. In large picture details, this distortion produces brightness variations between the left and right sides of the screen.

Horizontal streaking and smearing may also be apparent. Any test signal containing an 18 μsec, 100 IRE bar such as the FCC Composite or the NTC-7 Composite can be used for this measurement. See the discussion on Linear Distortions and Kbar units.