CCIR System L
CCIR System L is an analog broadcast television system used in France and Luxemburg.[1][2] It was the last system to use positive video modulation and AM sound.
Initially adopted in the 1970s and associated with the SECAM color system, it was discontinued in 2011, when France transitioned to Digital Video Broadcasting.
Specifications
Some of the important specs are listed below.[3][1]
| Frame rate | Interlace | Field rate | Line/frame | Line rate | Visual b/w | Vision mod. | Preemphasis | Sound mod. | Sound offset | Channel b/w |
|---|---|---|---|---|---|---|---|---|---|---|
| 25 | 2/1 | 50 | 625 | 15625 | 6 MHz. | Pos. | AM | -6.5 MHz. | 8 MHz. |
Television channels were arranged as follows:[4][5]
| Channel | Video carrier (MHz) | Audio carrier (MHz) |
|---|---|---|
| 1 | 47.75 | 41.25 |
| 2 | 55.75 | 49.25 |
| 3 | 60.50 | 54.00 |
| 4 | 63.75 | 57.25 |
| 5 | 176.00 | 182.50 |
| 6 | 184.00 | 190.50 |
| 7 | 192.00 | 198.50 |
| 8 | 200.00 | 206.50 |
| 9 | 208.00 | 214.50 |
| 10 | 216.00 | 222.50 |
| 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 |
Notes and references
- https://www.itu.int/dms_pub/itu-r/opb/rep/R-REP-BT.624-4-1990-PDF-E.pdf
- "World Analogue Television Standards and Waveforms". August 30, 2012. Archived from the original on 30 August 2012.
- Reference Data for Radio Engineers, ITT Howard W.Sams Co., New York, 1977, section 30
- "Archived copy". www.pembers.freeserve.co.uk. Archived from the original on 30 August 2012. Retrieved 12 January 2022.
{{cite web}}: CS1 maint: archived copy as title (link) - "Archived copy". www.pembers.freeserve.co.uk. Archived from the original on 30 August 2012. Retrieved 12 January 2022.
{{cite web}}: CS1 maint: archived copy as title (link)
External links
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