[ferix]

Originally Posted by Stedy

@Ferix,

So you are using an A500?
The lack of colourburst on the video signal gave it away.

Yes, you're right. I forgot to mention It.

Originally Posted by Stedy

The composite video output on the A500 is DC coupled from the video hybrid. On the A600/A1200 the composite video output is AC coupled from the CXA1145. The DC coupling will explain why the bottom of the sync from the A500 is not at 0V.

I didn't realize. It makes sense.

Originally Posted by Stedy

Try a 470uF electrolytic capacitor on the video output. Connect the + terminal to the output from the Amiga and the - terminal to the wire going to the SCART lead. This replicates the output of the A600/A1200.

I'll try that, but I guess It's not the solution...
I think that the video levels are too high yet...

Originally Posted by Stedy

Did you try using the output of the A520?

Well... I can't use the scart cable and the A520 at same time... at least without dismantling one of them... they are both plugged to the same connector on the amiga side :P
However, I looked at the CVBS signal from the A520, ant It looks like the one from the A500, but with the colour burst, of course.

Originally Posted by Stedy

I'll think about this some more and post again tomorrow. Thanks for the scope plots.

Thank you for the replies.

P.D.: As you probably realized, English is not my first language, so I apologize if you get confused.