For 2-phase (standard) there’s no settings to change any ntsc related settings, it comes preloaded the way it looks. That preset uses the “ntsc-320px-composite” shader which can be found in the ntsc shader folder. It’s pretty much the old original version of guest.r’s ntsc shader but without any customizable settings.
My plan at first was to just use guest.r’s ntsc shader but I wasn’t liking how the 3-phase part of the shader was looking for me no matter how many different ways I tweaked it so that’s how 3-phase ended up using a completely different ntsc shader.
Speaking of 3-phase you can change some ntsc settings there, if you want less artifacts turn down the “Composite Artifact” setting, I also suggest tweaking the “Composite Sharp” settings as well afterwards if you don’t want the picture to look to sharp.