Sony Trinitron CRT CSYNC compatibility

[maxtherabbit]

Even on a digital display, you won't notice any problem with composite video sync if the video lines are properly shielded (like with coax cables). Visual interference from cvbs sync comes from the signal coupling into the video lines.

If you're using good cables, the only reason to go with csync is for compatibility reasons, where you have some non-consumer product that can't handle normal cvbs sync, like the Extron switchers.

Conversely, the only reason to go with NOT csync is if you have a European TV

[Guspaz]

Even on a digital display, you won't notice any problem with composite video sync if the video lines are properly shielded (like with coax cables). Visual interference from cvbs sync comes from the signal coupling into the video lines.

If you're using good cables, the only reason to go with csync is for compatibility reasons, where you have some non-consumer product that can't handle normal cvbs sync, like the Extron switchers.

Conversely, the only reason to go with NOT csync is if you have a European TV

I'd wager there are more devices expecting (and only fully supporting) cvbs sync than csync, and csync introduces the issue of 75ohm vs TTL, while cvbs sync is always 75ohm. There's also scenarios where some consoles have different pinouts in different regions, like the PAL SNES outputs +12v power on the same pin that the NTSC consoles output csync. With csync, depending on the console and cable, there's a risk of slowly frying your display/scaler with TTL or quickly frying it with +12v.

While it doesn't eliminate the need for different cables for different consoles/regions, sticking to cvbs sync eliminates this risk of frying a device because you accidentally plugged in the wrong cable. There are also plenty of consoles that output cvbs sync and not csync.