Originally Posted by mariner888
Anyway, the dropped frames issue with Nvidia card was resolved, and more tests were done with 47.952, 48, 50, 59.94 and 60.02 Hz refresh rates. Both the LCD monitor and DLP projector performed with flying colours. It would appear that the TMDS receiver in the display had no problem syncing with different pixel clock rate, and whether any refresh rate conversion was done subsequently was difficult to tell indeed. Quite an amazing result.
Nice! What was the resolution to the dropped frames issue?
As the guys at the IT department have figured out how to add custom refresh rates to windows registry without PS, I look forward to the next version of PS free judder test. Would it then have the ability to output at frame rates independent of the display refresh rate?
Frame rate and refresh rate could easily be independent, but what concerns me is that it would be at odds with the purpose of JudderTest. It would be useful for simulating judder, but could also confuse those who do not understand exactly what is happening. Worst case scenario would be judder blamed on a display when it was just a newbie testing with bad parameters. An "advanced checkbox" to enable arbitrary frame rates could be a compromise.
The experiment with dual Canon did not proceed well. The guys could not get the nvidia driver to do 90 degrees rotation in spanned mode, and if configured as dual mode performance would take a big hit.
Aw, too bad!
So the search continues for 1080p LCOS, and the HD2K is looking good at the moment. The timing specs provided on the JVC website has detailed timing blocks defined for 50 and 60Hz, so I guess it means official support for both. As you are familiar with JVC products, would you know if it also supports 48Hz?
Unfortunately, I recall someone having judder issues with HD2K. I think it was at 48Hz, or even 50Hz. It was here on AVS, a number of months ago. Better look it up to be sure (or test it), but it makes sense, HD2K was released before HX2 and could have the same problem as HX1.
Finally, would like to know how you set custom refresh rates with your HX2. Did you change the pixel clock while keeping the same porches, or change the horizontal porches with same pixel clock?
I use horizontal porch to get as close as possible to the refresh rate I want. If it doesn't hit it spot on, I alter the pixel clock one step up or down. This gives a whole new set of refresh rates to chose from. Eventually I get all the decimals right.
I suppose an alternative could be to go for lowest possible pixel clock and minimal porch and synch. High pixel clock should only contribute to higher risk of errors when transferring pixels. I didn't test the limits much myself. I was happy once I had the important refresh rates dialed in.