Disliked{quote} The upper block is fully explained already. Kindly read back some posts and you'll find it. The 2nd block is, what you've analyzed for yourself already, the mtf double gap which is a part only of the full gap filter. The other part works in the background and is just another mtf gap calculation. Hence, the correct name for this system should be mtf fourfold gap. More information I can't give anymore since it is used by others for their commercial products!Ignored
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