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Oh no, it’s you again.. 🙂

Sampling Phase will move the sampling position from 0 to 360 degrees, 360 deg is a width of a single pixel.
Your goal is to sample only ONE pixel at a time without overlapping the next or previous pixel.
This option is only useful in Optimized Mode, since in Generic Mode the sampling frequency is much greater than actual horizontal resolution of the console.
Old LCD monitors with VGA only input would automatically adjust the phase clock.

Here is an example of wrong sampling phase:

Here is sampling phase correctly adjusted:

Supersampling X2 will double the sampling rate of H.Samplerate setting, effectively lowering apparent horizontal pixel misalignment thus shimmer.
So if H.Samplerate is 1630, the digitizer will sample 3260 times between horizontal sync pulses.
Very useful with lower H.Samplerate settings like Line2x.
Keep it on, I don’t see a reason to turn this off.

Reverse LPF is just a sharpening filter meant for consoles that for some reason have excessive blurry/smeared image like the non-1chip Snes.
0 = off, this will represent the true signal from your console.

PS1 is only RGB+Sync.
PS2 is RGsB ONLY in 480p progressive mode, otherwise like the PS1 RGB+Sync in 480i or 240p modes.
RGsB means the sync signal is not separate from the RGB lines, but is combined on the Green channel.
The cable is absolutely identical.

NTSC uses 525 lines for the entire frame between vsync signals, that includes back and front porch, blanking and sync, the active (content) resolution is only 480 lines out of these 525.
PAL uses total of 625 lines while only 576 are active.

Now move along, you’re asking too much questions.