and because of the name "multiscan" I wondered if I could connect a 15khz rgb signal to it.
No, definitely not. I have a SONY MultiscanG200 monitor, which is perfect for VGA screens, but when it comes to AMiGA native Pal modes, it goes "Out of scan range". I have solved this problem with a CV3D-scandoubler module, which is very handy in old apps (non-DOS, won't use the DblPal screenmodes).
You have to transform the 15KHz signal to 31KHz.
