Please don`t get me wrong i just try to learn more about this stuff and try to get the best possible setup...
That's why I went for the longer explanation - I think it helps if you understand the reasons why this stuff is the way it is
The important thing is that you are happy with how normal video looks on-screen, not what test patterns look like - they are just a guide, so don't get too worried about getting 'perfect' test patterns.