I have a question for @hunterk @nesguy and anybody else who wants to chip in. Is there any noise transferred between scanlines? So my mental image of how these systems work says there isn’t.
My mental image of how they works is so: when a console converts the frame buffer into a signal it linearly traverses the frame buffer line by converting it into a long analogue string that it then sends down the cable to the CRT. The CRT then reads this signal and adjusts the three beams according to what is sent. Those beams traverse the screen from top to bottom tracing out the analogue signal again as a single long linear signal as if all the pixels/phosphors had been lined up next to each other on a single row.
At no point is there any noise that can be transferred from one scanline to the next or previous scanline. The only time this can happen is if the two scanlines are wide enough/close enough to overlap on the screen itself (but no interference can happen before that point).
Am I right in thinking this?