Help me if you can!

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There are three layers: Channel standard, Video (Chroma) standard, and Sound (stereo) standard.

Channel standard refers to the spacing between the (analog) video and audio carrriers: L, D/K : (France, China, Czech(old) = 6.5 MHz) I : UK, HK = 6.0 MHz B/G : Italy, Germany, Australia, Sweeden (others) = 5.5 MHz M : North America, Japan, Korea, Taiwan = 4.5 MHz

Chroma or video standard refers to the color encoding SECAM : used with D/K or L has two separate chroma components on each alternate line, combined later. PAL : used with D/K or B/G (and sometimes M) encodes color hue in the phase of the subcarrier. Alternate lines shift phase by 180 degrees to equalize some channel errors. NTSC : used with M, transmits color hue as the phase of the chroma subcarrier. An additional phase reference is transmitted during the vertical interval for hue correction.

L' is a notation that means the local oscillator is low-side, rather than high-side injected.

Sound standards are: A2 - some of Europe, Korea, Some of China, others NICAM - some of Europe, UK, HK, Sweeden, others BTSC - North America EIAJ - Japan

Looking at tuner specs?

Regards,

Frank Raffaeli