Posted by Ryan Osborn on 26, 2000 at 2:49 AM:
In Reply to: Re: Playstation in a cab question posted by -Ace- on 24, 2000 at 1:57 PM:
: Hey Tom61, a note mentioned on the Gamesx site:
: NEW! [Jan 12/99]: You must add a 220uf capacitor in each of the RGB lines to get an acceptable picture. If you don't, the picture will be too dark and you won't like it!!
: Is this necessary?? I hooked up a Saturn to my cab and didn't need these capacitors.
An analog signal can look the same whether it's based around 5 volts (like a 2 volt peak-to-peak amplitude sine wave that reads from 4V to 6V) or 0V (like a 2 volt peak-to-peak amplitude sine wave that reads from -1V to 1V). The Playstation may base its video signals around 0V while the monitor expects the signals to be based around 5V. Adding the capacitors 'couple' the two systems so that the Playstation's signal will end up matching the reference voltage of the monitor.