Quote:
"I adjusted the refresh rate up from 72Hz to about 76Hz, and I clearly saw the same behavior that you did. It was actually pretty good at the default 72, but it was best for me at:
72.417
74.012
75.808
Directly in-between those numbers the picture was both very fuzzy and very noisy, as if the phase was really poorly adjusted.
As I approached the "sweet spot", the slight ghosting of each pixel into its horizonally adjacent pixel lessened. If I went too far, it would start ghosting into the other adjacent pixel.
When I got it dead-on, there wouldn't be any ghosting, and the blacks in the font I was looking at appeared to be blacker (presumably because the adjacent grey pixels weren't ghosting into them).
In any case, it was a definite improvement (at least from up close), so my default refresh rate for 1360x768 is now 74.012!"
Chris, very glad to hear I'm not seeing things!
http://www.avsforum.com/ubb/smile.gif
If you're like me, you'll be going back and checking that from time to time, just to be sure, and find that 72hz(or very close to) just isn't it.
Quote by Patrick:
"The 'ghosting' you saw was most likely because your DILA's tracking adjustment was off."
Patrick,
That has
never been my finding. I've done these experiments a hundred times and my tracking is always spot on. Phase is another thing. I've bounced around with phase a bunch of times, but not because of an issue with what we're talking about here. Phase has absolutely nothing to do with the fuzziness that I'm seeing when my refresh rate is off. Dancing pixels, yes. Fuzziness, no.
FWIW, I use Mark Rs "Digital Test Pattern"(available via e-mail if you need it) to cover the whole desktop. The Dilard T & P Wizard does exactly the same thing, I just find Mark Rs desktop pattern easier and quicker to load.
"I just wanted to make sure you knew that it'll be different for each refresh rate"
Not true in my experience.
"since your description of the ghosting was dead-on for a tracking problem."
That
is true, but again, changing the refresh rate doesn't seem to affect the perfect tracking. My tracking is and has always has been at 24.
Chris