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. Used on VHF only.
Specifications Some of the important specifications for System C are listed below:Reference Data for Radio Engineers, ITT Howard W.Sams Co., New York, 1977, section 30 Frame rate: 25 Hz Interlace: 2/1 Field rate: 50 Hz Lines/frame: 625 Line rate: 15.625 kHz 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:
+ System C 625 lines Channel Video carrier (MHz) Audio carrier (MHz) 1 41.25 46.75 1A 42.25 47.75 2 48.25 53.75 2A 49.75 55.25 3 55.25 60.75 4 62.25 67.75 4A 82.25 87.75 5 175.25 180.75 6 182.25 187.75 7 189.25 194.75 8 196.25 201.75 9 203.25 208.75 10 210.25 215.75 11 217.25 222.75 12 224.25 229.75
See also CCIR System B CCIR System L Broadcast television systems Television transmitter Transposer
Notes and references
External links World Analogue Television Standards and Waveforms