CCIR System L

CCIR System L is an analog broadcast television system used in France, Luxembourg, Monaco, and Chausey. It was the last system to use positive video modulation and AM sound.
Initially adopted in 1963 for second national black and white public channel and officially associated with the SECAM color system in 1967, it was discontinued in 2011, when France transitioned to Digital Video Broadcasting.

Specifications

The main System L specifications are listed below:

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: Positive
Preemphasis: 50 μs
Sound modulation: AM
Sound offset: -6.5 MHz
Channel bandwidth: 8 MHz

Television channels were arranged as follows:

Channel	Video carrier	Audio carrier
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	Audio carrier
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