CCIR System L

Summary

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.

SpecificationsEdit

Some of the important specs are listed below.[3][1]

System L specifications
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]

System L VHF channels
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
System L UHF channels
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

See alsoEdit

Notes and referencesEdit

  1. ^ a b https://www.itu.int/dms_pub/itu-r/opb/rep/R-REP-BT.624-4-1990-PDF-E.pdf[bare URL PDF]
  2. ^ "World Analogue Television Standards and Waveforms". August 30, 2012. Archived from the original on 30 August 2012.
  3. ^ Reference Data for Radio Engineers, ITT Howard W.Sams Co., New York, 1977, section 30
  4. ^ "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)
  5. ^ "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 linksEdit

  • ITU, Characteristics of television systems
  • World Analogue Television Standards and Waveforms
  • Fernsehnormen aller Staaten und Gebiete der Welt