NewHome › Forums › OSSC, OSSC Pro and DExx-vd isl › OSSC – Discussion and support › Will OSSC work for 1989 Super Offroad Arcade conversion to LCD? › Reply To: Will OSSC work for 1989 Super Offroad Arcade conversion to LCD?
1. I do believe simply using an OR gate will not provide proper sync but someone more knowledgeable would have to confirm that. It might be easier to just buy a VGA connector so you can connect everything to AV3 without having to combine sync and reduce TTL levels for SCART.
2. Here are some video level voltages: https://www.maximintegrated.com/en/app-notes/index.mvp/id/1184 The RGB voltages when 75 Ohm terminated should max be at 0.7V pp and sync around 0.3V pp. 75 Ohm terminated means that the wire is connected to the display/OSSC which have 75 Ohm resistors terminating to ground inside.
3. With 75 Ohm he means it should be the above video level voltages and not TTL.
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