Quote:
Originally Posted by jr_tech
I believe that they define the resolution scale in various parts of the "wedges" from 200 to 450 lines in the center and 200 to 350 at the corners
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NBC, oddly enough, had a layout of their famed "bullseye" pattern in which they explained what the significance of the wedge calibration dots as positioned on each side of their horizontal and vertical wedges, were:
Alas, I haven't heard, seen or read anything about this variation being seen on the air.
NOTE: 200 TV lines = 2.5 MHz (or "mc," as it was known as of 1947).