CCIR System C

CCIR System C (originally known as the Belgian 625-line system) is an analog broadcast television system used between 1953 and 1978 in Belgium, Italy, Netherlands and Luxembourg as a compromise between Systems B and L. Used on VHF only.

Specifications
Some of the important specifications for System C are listed below:


 * Frame rate: 25 Hz
 * Interlace: 2/1
 * Field rate: 50 Hz
 * Lines/frame: 625
 * Line rate: 15625 Hz
 * Visual bandwidth: 5 MHz
 * Vision modulation: Positive
 * Preemphasis: 50 μs
 * Sound modulation: AM
 * Sound offset: +5.5 MHz
 * Channel bandwidth: 7 MHz
 * Assumed display device gamma: 2.0

Television channels were arranged as follows: