Saturn Pure Sync SCART - Feedback requested!

[buckoa51]

Okay, after asking around for what feels like forever I'm close to sourcing the bits needed to make pure sync Sega Saturn SCART cables. As a couple of us have discovered, using the Saturn's pure sync with the XRGB3 in particular results in a better picture and, most importantly, no loss of picture when the screen goes bright white during game-play, effectively making the Model 2 Saturn's RGB as nice as the Model 1's.

Now, before I get the cables ordered, I heard a rumour that the sync output on the Saturn should actually be capped since it's voltage is not standard, is this true? Also, I had considered adding a switch to the design that would allow the end user to toggle between pure sync and composite video for sync, does anyone think this would be useful? It would allow the cable to be backwards compatible should, God forbid, you need to use composite but then again who does?

I eagerly await your reactions

[zyrobs]

I don't have a XRGB, but when I used pure sync on my Panasonic G10E TV, I got jumping pictures in PAL mode. From what I measured, the c-sync line is too strong, but it is possible that my multimeter measured it wrong since it cannot check AC values. So don't take my word on it.

I never lost the picture when it went full bright, neither with c-sync nor with composite video. That may be an XRGB thing.

Adding a switch for c-sync / composite sync is a nice idea, but optimally you'd have to install it in the Saturn end and not in the scart end, so the composite signal doesn't interfere with the RGB signal.