Editing Kinescope (section)

=== Shutter bar and banding problems ===

The 72°/288° shutter and the systematic loss of 12 fields per second were not without side effects. In going from 30 frame/s to 24 frame/s, the camera photographed ''part'' of some fields. The juncture on the film frame where these part-fields meet is called a ''splice''.

If the timing is accurate, the splice is invisible. However, if the camera and television are out of phase, a phenomenon known as ''shutter bar'' or ''banding'' occurs. If the shutter is slow in closing, overexposure results where the partial fields join and the ''shutter bar'' takes the form of a white line. If the shutter closes too soon, underexposure takes place and the line is black. The term ''banding'' refers to the phenomenon occurring on the screen as two bars.