I had the privilege today of helping Jeff â€œtheblandâ€ set up his new HDL and JVC DLA-G150CL with Panamorph.
We connected the HDL DVI out to the JVC DVI input. The DVD player was set to 480i output via SDI to the HDL SDI input. The output aspect ratio was set for 1.33:1 at 1280 x 960, 60Hz (1.33 was used to accommodate the Panamorph). The projector was set to 1:1 pixel mapping and zoomed slightly to fit the screen.
After everything was connected and set up we fired up â€œThe Fifth Elementâ€ Superbit edition, to try things out. After some adjusting with the Panamorph, the picture snapped in and looked great, see the attached screenshots. After a minute or so, we noticed that the projector was â€œloosingâ€ the DVI signal and would drop to the â€œblueâ€ no signal screen for a second and then â€œfindâ€ the signal again. We checked the connections. The SDI connection to the DVD player seemed loose, so we tightened it up. Still drops to a blue screen every few seconds at seemingly random intervals. We tried a different SDI cable, same result. Next we tried displaying a KDL internal test pattern, with the same loss of DVI signal.
Thinking the problem could be in the DVI cable, we replaced it. No signal loss for a minute or two, then it began again in earnest, end of DVI fault theory.
In a long shot hope of stopping the â€œblue screenâ€ menace, we changed the output refresh from 60Hz to 72Hz. Lo, and behold the signal loss stopped, but was replaced by horrible stuttering as the projector translated the 72Hz frame rate to its internal 60Hz panel refresh rate. We also tried 48Hz and 75Hz, neither of which produced the â€œblue screenâ€ effect. 75Hz refresh minimized the stuttering effect, but does not eliminate it.
We tried using the component input on the projector at 60Hz, and the RGBHV driven by an HTPC/Laptop, all of which worked fine.
Ran out of time and didn't get to try it with an HD source.
At this point Iâ€™m not sure if this is an HDL issue, a JVC issue or an interaction of the two. The picture quality produced by the HDL was much better than the internal JVC de-interlacer/scaler. Overall the HDL was not difficult to install or set up, although the response time on the menu, in particular on the output resolution setting, is slow.
Screenshots:http://www.cmcpics.homestead.com/screenshot1_thumb.jpgClick for full size image.http://www.cmcpics.homestead.com/screenshot2_thumb.jpgClick for full size image.