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Hmmm.... so then the question becomes does the monitor have to be designed to deal with these composit signals ? In other words if I use a RGB to VGA adapter cable will I get a good display on an LCD monitor ? (assume an older LCD with relatively low horizontal frequency specs)The green signal becomes, in effect, a composit, black and white style, video signal. The green video is in the positive direction while the sync signals go negative. The Voltage that represents black is the level/line which separates the two.
The two signals, green and sync, are also separated in time just as they are in a B&W video/TV signal. The two signals never occur at the same time. This goes back to the earliest days of TV.
And these two signals are separated in the monitor in the same way they were separated in the original B&W TV sets. The signal is "clamped" to a known Voltage level and anything more negative is sync while anything more positive is the video. Easy-peasy!
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