The Video Level:
A method of representing data using continuously varying electrical voltages.
Analog video, is subject to degradation due to noise, distortion and other electronic
phenomena. Normal signal levels should be 1volt. If video levels drop to far below
1volt the video signal will be distorted or lost. If the video level is greater then 1volt
"hot signal" distortion usually appears to changes in the luminance or chrominance
portions of a signal. It may contort the picture and produce improper contrast, faulty
luminance levels, twisted images, erroneous colors and/or snow.