CCIR System C

CCIR System C (originally known as the Belgian 625-line system) is an analog broadcast television system[1] used between 1953 and 1978[2] in Belgium, Italy, Netherlands and Luxembourg as a compromise between Systems B and L. Used on VHF only.[3]

Specifications

Some of the important specifications for System C are listed below:[4][3][1][5]

System C specifications
Frame rate Interlace Field rate Line/frame Line rate Visual b/w Vision mod. Preemphasis Sound mod. Sound offset Channel b/w Assumed display device gamma Usual color system
252/15062515625 Mhz5 MHz.Positive50 μsAM+5.5 MHz.7 MHz. 2.0 none
Plan showing VHF frequency ranges for ITU Systems

Television channels were arranged as follows:[2]

System C 625 lines
ChannelVideo carrier (MHz)Audio carrier (MHz)
141.2546.75
1A42.2547.75
248.2553.75
2A49.7555.25
355.2560.75
462.2567.75
4A82.2587.75
5175.25180.75
6182.25187.75
7189.25194.75
8196.25201.75
9203.25208.75
10210.25215.75
11217.25222.75
12224.25229.75

See also

Notes and references

  1. DOCUMENTS OF THE Xlth PLENARY ASSEMBLY - OSLO, 1966 - VOLUME V - SOUND BROADCASTING TELEVISION (PDF). INTERNATIONAL TELECOMMUNICATION UNION. 1967.
  2. "World Analogue Television Standards and Waveforms". August 30, 2012. Archived from the original on 30 August 2012.
  3. "World Analogue Television Standards and Waveforms". August 30, 2012. Archived from the original on 30 August 2012.
  4. Reference Data for Radio Engineers, ITT Howard W.Sams Co., New York, 1977, section 30
  5. "C.C.I.R. Report 624-4 Characteristics of television systems, 1990" (PDF).
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