CCIR System K

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]

Analog TV systems global map, with System K in pink.

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

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: 15.625 kHz
• 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]

System K 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

System K1

Plan showing VHF frequency ranges for ITU Systems

French overseas departments and territories used a variation named System K1 for broadcast in VHF.^[6] UHF channels were similar to K.^[3]

System K1 VHF channels

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

• Broadcast television systems
• Television transmitter
• Transposer

Notes and references

1. Amadeus Trappe, Raffael (2005). "Weltweite Fernsehsysteme (NTSC, PAL und SECAM)". www.paradiso-design.net. Archived from the original on December 9, 2012. Retrieved 2023-06-05.
2. Report 624-4 Characteristics of television systems (PDF). UIT. 1990.
3. "World Analogue Television Standards and Waveforms". www.pembers.freeserve.co.uk. Archived from the original on 30 August 2012. Retrieved 12 January 2022.
4. Reference Data for Radio Engineers, ITT Howard W.Sams Co., New York, 1977, section 30
5. "World Analogue Television Standards and Waveforms". 2007-05-15. Archived from the original on 2007-05-15. Retrieved 2023-04-13.
6. "World Analogue Television Standards and Waveforms". www.pembers.freeserve.co.uk. Archived from the original on 30 August 2012. Retrieved 12 January 2022.

External links

• World Analogue Television Standards and Waveforms
• Fernsehnormen aller Staaten und Gebiete der Welt