For systems that output video vida RGBS (S being composite sync), is this signal suppose to be AC "TTL"? The reason why I ask is because probing a composite sync signal from my SNES shows about a 0 to -2.5Vpp sync signal (unloaded). I want to test the composite sync line on a few more old consoles to confirm this is accurate but until I do that I wanted to get some input here.
So this the C-Sync line suppose to be AC coupled too? If so that doesnt make any sense... why would you AC couple a TTL signal? And why is the peak amplitute only 2.5V? Also does the csync signal also have a 75 ohm output impedence like the RGB lines?
Also, does anybody know where I can get some spec sheets for analog RGB signals? If I had one or knew where to get one I'd be able to answer all these questions myself...
Thanks
So this the C-Sync line suppose to be AC coupled too? If so that doesnt make any sense... why would you AC couple a TTL signal? And why is the peak amplitute only 2.5V? Also does the csync signal also have a 75 ohm output impedence like the RGB lines?
Also, does anybody know where I can get some spec sheets for analog RGB signals? If I had one or knew where to get one I'd be able to answer all these questions myself...
Thanks