It seems I was wrong. The sega 3085 adapter was sold to be used in conjuction with the Megadrive RGB French Model, which in turn had the following modification already done to the motherboard: Pin 11 of the encoder CAX1145 (Comp. Sync out) is routed with a yellow wire to AV port pin 7... So, the adapter was not meant to give raw sync signal a proper treatment before reaching television or monitor. Unfortunately this leaves me with no more clues about what would be the official solution by sega or sony to make safe use of the raw Sync signal. On the other hand, I have been doing some thorough reading to this thread: http://eab.abime.net/showthread.php?t=47281 If we extrapolate the technicalities of the given Amiga example, then perhaps it is all down to: - Raw composite sync is a digital signal, TTL level of around 5 Volt peak-to-peak which would require the use of a 330 ohm resistor to be safely used by TV or monitor; - Since it's a digital signal there would be no need for a capacitor; - Although digital, it works being treated as analogue by the majority of TV's and monitors (exceptions exist); - Raw Sync (digital) is better for upscalers and professional monitors, whereas Composite Sync (analogue) is safer for our TV's and monitors. Any ideas? Or better even, anyone with an oscilloscope could please measure the raw Sync signal on the MD, Saturn, PS1, PS2 and DC, please...?