On 2012-11-26, at 20:58, Gerrit Heitsch wrote: >>> Maybe that generator in your 6569 is a bit 'off' with respect to signal quality? Have you tried a different 8701? >> >> After I fixed that second board I have now two working 250425s. Both behave almost identically. Swapping VICs and 8701s doesn't make any change. > > What revisions of the 6569 do you use? Also, how hot do they run? R5 and R3. R5 runs very hot (don't have the meter here). R3 runs hot. Just - the artefacting doesn't seem to be highly temperature dependent. Yes, there is a change with temperature but the reddish pixels are there from the cold start. >>> Also, some people claim, that the old clock generator (74LS629 and MC4044P on the 250407 boards) produces less jitter than the 8701. >> >> I watched the clocks from the 8701. They look differently on the wide and on the narrow boards but generally both seem to have similar jitter (as far as I can tell from measuring freq on different ranges) while the output from 8565 doesn't create the ghostings. The chroma output from 6569 and 8565 does differ significantly though. Hm, maybe I check with a "regular", not studio monitor. Who knows, maybe this one is more sensitive to things being off norm. > > I only have a 1084 and 2 LCD (one a TV) with S-Video input. They all show the color ghosting differently. I have not tried CVBS. Yes, this is all Y/C connection here. -- SD! Message was sent through the cbm-hackers mailing listReceived on 2012-11-26 21:00:51
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