Oh, INHD budgets it for 30 minutes on the program guide. On the INHD website they call it 15 minutes. That too might be a stretch. Then they run teasers for IMAX films on INHD2, which I don't receive, just to make me angry.

I missed the first pattern or two, as I stumbled out of bed at about 7:02. I caught a brightness, then a color test I think. I just read on the Internet that it has "Color, Contrast, Convergience, Overscan, and 5.1 sound tests".