Can a CRT TV or LCD TV that doesn't support S-Video through SCART (no S-Video connector either) display a signal through an RGB cable with luma on sync? I always wonder what will happen. Thanks!
Yeah, the TV will see it fine. In RGB mode, it just needs the sync signal from Pin 20. It will strip the rest of the signal and leave the sync signal.
Is that true of a PVM too? My PVM will accept composite video as sync. Should sync on luma work as well?
I don't see why not if it accepts composite video as sync. I know that my PVM works fine with Luma as sync. It's how I used to hook up the PS1/PS2 before my Extron RGB 201 Rxi.
I was thinking that if an Y/C signal doesn't exist on a TV then connecting an RGB cable with luma on sync, that signal will be "converted" to composite on sync because no Y/C signal is supported by TV.
It doesn’t work like that. In order for the signal to be converted to composite video, the chroma signal also has to be present. Sync on luma cables lack the chroma signal. The TV doesn’t care if you throw in composite video as sync, luma as sync, or even pure c-sync. It has a sync stripper circuit that removes the rest of the composite video and luma signals, leaving only the c-sync signal embedded in those two signals. If you really wanted to, you could create a sync on blue signal, split the blue signal into two wires, and send them to both the blue input and the sync input. It would still work as the TV is stripping the signal for sync. It is how they are designed.
You’re welcome! I’m no expert on video signals themselves but connecting signals is something I do know a thing or two about. I did some research after being explained to how I was wrong about these signals in the past and managed to find this info along with what I was told by an expert. Not to mention I’ve done tests as well. Did you know there is a signal that sends sync down all three RGB signals? It’s called sync on all or RsGsBs. Completely pointless, but it exists and Extron equipment tends to advertise support for it.
