Need help with RGB - very wavy picture

[mrwhitethc]

Hi,

I've been reading and re-reading and finally decided to take the RGB plunge. I have a sega saturn and a snes and I've bought cables from the electric quarter website. I was able to get a monitor from a friend, it's a Proton VM-210 which has a 9pin RGB connector on the back along with a Sync on Green Negative/Positive switch. I also bought a SCART 4 way switch with RGB on/off switch, a breadboard, db9 cable wires, resistors, lm1881 etc. I can't get any picture from the SNES however I get a very wavy picture from the saturn that looks like it is constantly rolling up and down which also right to left, almost diagonal. Right now I have pins 15, 11 and 7 from the scart connector connected, I tried the other connections one by one to different pins on the db9 but all I seem to get is yellow streaks with certain ones. Any help appreciated.

[mrwhitethc]

Interestingly I found a 9pin to 15pin converter, no idea what kind, it has no labels it's just a hard cable. I plugged that into the TV and plugged my dreamcast into it with the vga connector, same wavy appearance however it was almost reverse? Like instead of  / / / it was \ \ \ I have no idea what this means I thought it was an either or thing with TV's that either RGB worked or VGA worked but not both? Or does this mean this monitor is a multisync monitor.

[zyrobs]

I had the same problem with my Saturn. It is caused by the interference between the composite signal and the RGB signal (which is also what causes the buzzing audio during brighter pictures). Sadly, all the Saturn RGB cables I've seen so far were cheaply made with zero shielding on the cables.

It could be avoided if you used a very short (5-10cm) female scart plug for your saturn, connected through a higher quality individually shielded scart lead to your TV (ex. Profigold). The problem is, nobody sells saturn to scart adapters like that, and you can't solder your own cables as it is impossible to find 10-pin minidin plugs. (unless you order 1000 of them from china)

So I guess your only choice is either soldering a short female scart output directly to the motherboard, or modifying a regular RGB out cable.