Can't get Master System and Framemeister to Work Together

[Legion]

I'm going from Sega Master System -> Framemeister -> to Elgato. I get audio but no picture. The picture is not getting to the framemeister as it passes audio but shows a blue screen with the words "No Input". Occasionally for a brief moment I'll get picture, but it'll be distorted. The distortion is similar to the kind you get when you have bad antenna reception. I have the SMS outputting RGB over SCART to the Framemeister's RGB in via the SCART to DIN adapter. I'm not using the bundled adapter for JP-21. I bought the euroscart version from retrogamingcables.com. I thought one of the cables could be the culprit, but after some testing I'm not so sure. The SMS RGB cable works fine when hooked up to my Sony PVM. I tested the SCART to DIN adapter pin by pin for continuity and to make sure the right pins on each end are connected and everything seems fine.

I tested this setup with the N64 and the Sega Genesis and both work fine. I haven't tested other consoles yet. What could be different about the SMS output?

[mickcris]

Have you tried to adjust the sync level setting? May need to increase it from the default setting of 9.

[Fudoh]

You have to check if the grounds actually connect in both your cables. If the Scart to MiniDin adapter expects GND on a certain pin, while the RGB cables delivers GND on another pin, this exact thing happens.

If grounds DO connect and sync level doesn't fix it either you need a stripper.

[Legion]

Checked the grounds and they look ok, except for one pin that I don't think is used. I upped the sync level to 15 and the picture comes through now.

Can you explain what the sync level setting does? Is it setting a threshold level? Or is it setting how much gain is applied to the signal? Is there any disadvantage to having too high of a sync level? By which I mean, why not just leave everything on max sync level?

[Fudoh]

is it setting how much gain is applied to the signal? Is there any disadvantage to having too high of a sync level?

something like that, yes. And no.

[Legion]

Sync level setting of 16 seems to work best. Is there any english documentation that describes what each menu setting does?

The closest I've found is this: http://junkerhq.net/xrgb/index.php/XRGB ... AMEMEISTER

But it's not exhaustive.

[BuckoA51]

But it's not exhaustive.

All contributions welcomed