CurtPalme.com Home Theater Forum

[1031]

[VideoGrabber]

Dave,
> It needs to be run like once a year or so. <

1031
> its good to use that warm up / Run in cycles function few times at year. <

I'd recommend once every 4-6 months (2-3 times/year), which is compatible with the above comments. Every time you power up makes no sense at all, and will definitely shorten the life, as Dave previously mentioned. Twice a year works for me, and I've never had any problems with cathode contamination, or accelerated wear.

Another option, along the lines of 1031's friend, is to not do it at all, until you eventually notice evidence of a problem. However, by letting it go that long, you run the risk of needing more "aggressive" treatment (plus progressively deteriorating PQ leading up to that point).

[VideoGrabber]

1024-point Individual R/G/B Gamma Correction for DVDO VP50

Discussion is now found here.

[VideoGrabber]

Dave,
> Yes, this only happens with analog solutions. Though per our other conversations, I know how to reshape the curve (if you will) with a Lumagen and an HTPC, I thought it was impractical on the VP50? <

Bizarre. With all the "warm up" discussion, I missed this response of yours completely. Sorry.

Well, you have your answer to that now, at least. It basically will be very similar to the HTPC method, that you're used to.

[Further discussions will be found here].

[dropzone7]

I know that this thread took a very different direction late last year but I need to revisit this and ask for some help again. I started this thread when I added a VP50 scaler to my setup along with the Moome FullXG card. I have been enjoying both for a while now and I'm learning more about the scaler each time I use it. My question is somewhat related to the scaler but perhaps more about the projector. Basically, I'm seeing an effect at the far left side of my screen that I can only describe as a wavy vertical band. It's easier to see on an all white image or an image of sky. If I put up the geometry pattern from the VP50 everything on screen looks pretty straight aside from that area at the far left. The horizontal arrow looks like a snake near the edge of the screen. The grid patterns show the same problem with a waviness at the left edge. Now just to give you a bit more background, this was not happening until I set up a 72hz output through the scaler. At 60hz I would say it might still be there but nowhere near as noticeable as at 72hz. Most people probably don't even notice this but it's starting to drive me nuts. Anyway, I played around the the VP50 a bit last night just to see if I could make this go away. I don't really know what I'm doing but with a combination of projector "position" and "image size" adjustments along with "horizontal sync" in the scaler I was able to smooth out that wavy edge a good bit. So, am I on the right track in trying to remedy the problem this way? Do I need to create a new signal entry in the projector and experiment a bit?

[MikeEby]

Are you using any blanking on the projector? If not try to apply some and see if it goes away.


Mike

[dropzone7]

[MikeEby]

[dropzone7]

I'm so desperate to fix it that I was considering going to a smaller screen size. I would rather not do that at this point. I suppose moving the rasters to a position that is not centered on the tube face is an option since I will likely be the last owner of this projector. It kind of goes against everything we are told regarding centering the rasters and maximizing the phosphur. Raster centering is a global adjustment right? So if I change where they are right now then it's going to affect all of my signal entries right? Duh, I guess that's what you said in your last statement. I suppose I could just right down my current settings and go back to them if I foul it all up.

Oh, speaking of high refresh rates, I tried to use 96hz and could not get it to work. Is this a limitation of my XG (852)? I went into the VP50 using a 1080i/60hz format and then went to "framerate" and hit "60hz unlocked". Then I cranked that number up trying to get to 96hz. Somewhere around 86 or so it started to go crazy. I got garbled mess all of the screen starting at the bottom and gradually working it's way up the screen as I increased the framerate.

[MikeEby]

[dropzone7]

Okay, so I'm back with more dumb questions. Just fiddling around with the VP50 scaler I notice that I don't have any 1080p output resolutions availabe. They are in the list but are grayed out for some reason. I'm sending 1080p/24 from my Blu Ray player to the VP50 and outputing 1080i/72hz. Is this a limitation of the XG (852), the XGFULLHD card, or the scaler? Am I doing someting wrong? I realize 1080p on an XG is problematic but I have also read that it's workable with a scaler or HTPC. What am I missing? I would think that the 1080p resolutions would at least show up in my VP50 menu even if I was not using them. I read the manual last night and could not find anything that answered my question.

[MikeEby]

You may have to back the refresh rate to 60Hz then the 1080p option might be available.

Mike

[dropzone7]

[dropzone7]

[MikeEby]

[dropzone7]

So, are there any users with an XG, VP50 combo running 1080p? I'm looking for the correct timings to input into the VP50. I'm not a PC guy so all of this is foreign to me. As stated earlier, I copied some settings I found in another thread but they were through a Crystalio scaler I believe. Will the timings differ from one scaler/HTPC to another or should I just be able to copy someone elses assuming they are using the same projector?

[MikeEby]

[dropzone7]

[dropzone7]

Stayed up LATE last night trying to get 1080p working. Mike, I used your numbers and Boom! It works! The geometry still needs work and I may have to do grayscale for this entry but I like what I'm seeing so far. I'm sending 1080p/24hz from the Blu Ray to the VP50 and outputting 1080p/48hz from the VP50. I'm not sure this is the optimal refresh rate but it synced up to the XG with no troubles and using your timings Mike, the image was much more centered than before and I did not have to do any raster movement at all, well maybe a bit of static on the red but that's it. My DVE Blu Ray revealed a much smoother image than what I'm used to seeing. I'm sure it's probably softer than my 1080i/72hz but overall there seems to be more detail. Could this be because I'm no longer seeing the scan lines? I sit about 12-14' back from my 108" wide screen. Well, I'm off for Valentine's Day lunch with the wife so I need to go. I just wanted to post here and say thanks to Mike again! I owe you man. You clued me in on the great price of the VP50 at SecondAct and have been very helpful with my questions as always. That's what I love about this site. All of you guys are so willing to help people like me that don't get it right away and need some hand holding.

[dropzone7]

Well...perhaps I spoke too soon. We sat down for our first movie since I had setup the 1080p entry and my wife had to leave the room. She said, "what did you do? It's flickering or something". Great, just great. She told me should could not watch a movie if it was going to look like that so we had to revert back to my 1080i/72hz settings. So, I guess 1080p/48hz is not a high enough refresh rate to avoid the flicker. I noticed it just slightly but perhaps I was just so excited to have it working that I didn't focus on it as much. I don't think this XG will allow me to sync to 1080p/72hz so I may be out of luck. I know the next thing you guys are going to say is why not use 1080i/96hz. Well, I don't think I can do that either. I even tried turning off 24p in my Blu Ray player and just sending 1080p/60. The scaler showed I was ouputting a bit under 60hz, like maybe 55 or 57, don't remember exactly. It seemed to like 1080p/48hz and if not for the flicker I think this would be perfect. Oh well.