Thanks for the details.
I don't want to hijack your thread, but I have two observations regarding the vertrez tests on my crt I am trying to understand.
1) I would assume that a crt would draw 1080i as just that - two passes, scan each field, with interleaved scan lines. For the 1 and 3 pixel strips, why do I see any flicker at all? Is it due to short phosphor duration ('on' pixels not glowing long enough?)
2) I am seeing a perplexing effect with the 2 pixel test - somewhat visible with vertrez1080, quite apparent with vertpix2 (full screen). Rather than a uniform display, I am seeing 8 cycles of a varying brightness band across the screen.
To draw an analogy,
The above shows two of the bands, with the '<' part being darker and the '>' part brighter. My gut reaction is I am seeing a scaling effect - which doesn't make sense, as 1080i is supposed to be one of the set's native resolutions (480p is the other). Or is this due to the crt shadow mask (how many lines of holes)?