> > A CRT won't produce hard alternating lines like that. > > A decent CRT will, they leave pretty much black lines when showing a 15khz non > interlaced display. TV's are more blurry and don't just up lines at all.
There are two reasonable setups. If you're intending to display 15kHz you'll have the beam focus soft enough that you'll get softness and blending on both sides of each scanline. If you're intending to display high resolution you'll have the beam focus as sharp as possible, so you'll get lit lines with nothing between them. Neither will produce an exact dimmer version of each line on one side only.