CCIR System K is an analog broadcast television system used in countries that adopted CCIR System D on VHF, and in Benin, Guinea, Republic of the Congo, Togo, Senegal, Burkina Faso, Burundi, Ivory Coast, Gabon, Comoros, Democratic Republic of the Congo, Madagascar, Mali, Nigeria, Réunion, Rwanda, Chad, Central African Republic, French Polynesia, New Caledonia, Wallis and Futuna, Guadeloupe, Martinique, Saint Pierre and Miquelon and French Guiana.[1]
It is identical System D in most respects.[2][3][1] Used only for UHF frequencies, its paired with SECAM or PAL color systems.
Specifications edit
Some of the important specs are listed below.[4][2][5]
- Frame rate: 25 Hz
- Interlace: 2/1
- Field rate: 50 Hz
- Lines/frame: 625
- Line rate: 15625 Hz
- Visual bandwidth: 6 MHz
- Vision modulation: Negative
- Preemphasis: 50 μs
- Sound modulation: FM
- Sound offset: +6.5 MHz
- Channel bandwidth: 8 MHz
Television channels were arranged as follows:[3]
| Channel | Video carrier (MHz) | Audio carrier (MHz) |
|---|---|---|
| 21 | 471.25 | 477.75 |
| 22 | 479.25 | 485.75 |
| 23 | 487.25 | 493.75 |
| 24 | 495.25 | 501.75 |
| 25 | 503.25 | 509.75 |
| 26 | 511.25 | 517.75 |
| 27 | 519.25 | 525.75 |
| 28 | 527.25 | 533.75 |
| 29 | 535.25 | 541.75 |
| 30 | 543.25 | 549.75 |
| 31 | 551.25 | 557.75 |
| 32 | 559.25 | 565.75 |
| 33 | 567.25 | 573.75 |
| 34 | 575.25 | 581.75 |
| 35 | 583.25 | 589.75 |
| 36 | 591.25 | 597.75 |
| 37 | 599.25 | 605.75 |
| 38 | 607.25 | 613.75 |
| 39 | 615.25 | 621.75 |
| 40 | 623.25 | 629.75 |
| 41 | 631.25 | 637.75 |
| 42 | 639.25 | 645.75 |
| 43 | 647.25 | 653.75 |
| 44 | 655.25 | 661.75 |
| 45 | 663.25 | 669.75 |
| 46 | 671.25 | 677.75 |
| 47 | 679.25 | 685.75 |
| 48 | 687.25 | 693.75 |
| 49 | 695.25 | 701.75 |
| 50 | 703.25 | 709.75 |
| 51 | 711.25 | 717.75 |
| 52 | 719.25 | 725.75 |
| 53 | 727.25 | 733.75 |
| 54 | 735.25 | 741.75 |
| 55 | 743.25 | 749.75 |
| 56 | 751.25 | 757.75 |
| 57 | 759.25 | 765.75 |
| 58 | 767.25 | 773.75 |
| 59 | 775.25 | 781.75 |
| 60 | 783.25 | 789.75 |
| 61 | 791.25 | 797.75 |
| 62 | 799.25 | 805.75 |
| 63 | 807.25 | 813.75 |
| 64 | 815.25 | 821.75 |
| 65 | 823.25 | 829.75 |
| 66 | 831.25 | 837.75 |
| 67 | 839.25 | 845.75 |
| 68 | 847.25 | 853.75 |
| 69 | 855.25 | 861.75 |
System K1 edit
French overseas departments and territories used a variation named System K1 for broadcast in VHF.[6] UHF channels were similar to K.[3]
| Channel | Video carrier (MHz) | Audio carrier (MHz) |
|---|---|---|
| 2 | 52.25 | 58.75 |
| 3 | 60.25 | 66.75 |
| 4 | 175.25 | 181.75 |
| 5 | 183.25 | 189.75 |
| 6 | 191.25 | 197.75 |
| 7 | 199.25 | 205.75 |
| 8 | 207.25 | 213.75 |
| 9 | 215.25 | 221.75 |
| 10 | 223.25 | 229.75 |
See also edit
Notes and references edit
- ^ a b Amadeus Trappe, Raffael (2005). "Weltweite Fernsehsysteme (NTSC, PAL und SECAM)". www.paradiso-design.net. Retrieved 2023-06-05.[permanent dead link]
- ^ a b Report 624-4 Characteristics of television systems (PDF). UIT. 1990.
- ^ a b c "World Analogue Television Standards and Waveforms". www.pembers.freeserve.co.uk. Archived from the original on 30 August 2012. Retrieved 12 January 2022.
- ^ Reference Data for Radio Engineers, ITT Howard W.Sams Co., New York, 1977, section 30
- ^ "World Analogue Television Standards and Waveforms". 2007-05-15. Archived from the original on 2007-05-15. Retrieved 2023-04-13.
- ^ "World Analogue Television Standards and Waveforms". www.pembers.freeserve.co.uk. Archived from the original on 30 August 2012. Retrieved 12 January 2022.