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mp20748
Joined: 12 Sep 2006
Posts: 5689
Location: Maryland
TV/Projector: 9500LC Ultra / Super 02 and 03 VIM
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| Posted: Sat Dec 19, 2009 10:17 pm Post subject: |
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| menec wrote: |
I really do hope you find a solution for this. This problem is bugging me ever since I switched to the Marquee. I always thought this was somehow related to my video chain, so I'm kind of happy that other guys are seeing this as well  |
Strange as it may sound, the "ringing" seen in my shots (and on the screen) is coming from the video chain, not the HDM..
It may be the HDM on another Marquee, but that's and based on what I've found out today, it would be smaller line. Not the bands like shown in my shots.
I did a complete sweep of the H-drive pulse all out to the power Fets. There was a tad of ringing, but nothing beyond the usually. mainly because it's hard to scope that sweep section. And when you do, you have to solder a ground right near every point that you measure.
There is one point in that chain where ringing is a concern... the H-drive IC should have been placed right next to the Fet drive transformer.
Once I found out where that noise (ringing) was coming from, I was able to vary it by making changes to the vertical blanking pulse that goes into the AD835.
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Sun Dec 20, 2009 12:56 am Post subject: |
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I have seen this on just about every projector directly connected to the source with a textbook set-up. It's the nature of the beast. There are work-arounds but then you're manipulating the raw image. Not a bad thing but it would be nice if you didn't have to do it. I get two ripples on the left side with no head room to adjust it out. On the AmPro it's hardly seen but it is there.
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Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
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mp20748
Joined: 12 Sep 2006
Posts: 5689
Location: Maryland
TV/Projector: 9500LC Ultra / Super 02 and 03 VIM
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| Posted: Sun Dec 20, 2009 12:59 pm Post subject: |
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I'll be getting back to the ringing problem soon. I took two pictures showing how I can manipulate the ringing on the VIM.
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mp20748
Joined: 12 Sep 2006
Posts: 5689
Location: Maryland
TV/Projector: 9500LC Ultra / Super 02 and 03 VIM
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| Posted: Sun Dec 20, 2009 1:07 pm Post subject: |
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A few more...
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Sun Dec 20, 2009 1:50 pm Post subject: |
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| mp20748 wrote: | I'll be getting back to the ringing problem soon. I took two pictures showing how I can manipulate the ringing on the VIM.
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WOW!!! I was looking at the vertical blanking circuit, do you think it might be due to the removal of the edge blend contrast circuit? Also what are you changing to get suck a massive ringing? And that almost looks like the bars in my images i have in the center from the cables braiding VDC does.
Craig Rounds also said he noticed those bars can be altered by adjusting side blanking.
Athanasios
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Don't blame your underwear for your crooked ass~ unknown Greek philosopher
"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan
One Smart Dog!!!
Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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mp20748
Joined: 12 Sep 2006
Posts: 5689
Location: Maryland
TV/Projector: 9500LC Ultra / Super 02 and 03 VIM
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| Posted: Sun Dec 20, 2009 11:47 pm Post subject: |
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The problem can be made to vary on the VIM, but it's actually caused from the HDM.
I've ordered a couple of parts and will be getting back to this. I think, not 100% sure I have it isolated down to a stage. I'll know for sure once i get the parts in.
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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mp20748
Joined: 12 Sep 2006
Posts: 5689
Location: Maryland
TV/Projector: 9500LC Ultra / Super 02 and 03 VIM
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| Posted: Mon Dec 21, 2009 12:35 pm Post subject: |
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More 100% Untouched (NOT sharpened, NOT lightened - Darkened, etc..) 1080P into my lowly CRT..
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mp20748
Joined: 12 Sep 2006
Posts: 5689
Location: Maryland
TV/Projector: 9500LC Ultra / Super 02 and 03 VIM
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| Posted: Fri Dec 25, 2009 4:24 pm Post subject: |
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More Untouched 1080P into my lowly CRT..
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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imprez25
Joined: 01 May 2007
Posts: 70
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| Posted: Fri Dec 25, 2009 8:18 pm Post subject: |
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Here are some of my 1251q on a 111" wide 2.40:1 BOC screen
I had these over on AVS, but thought I should post them over here too.
Fifth Element sd-dvd.
These are untouched other than resized by flickr.
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mp20748
Joined: 12 Sep 2006
Posts: 5689
Location: Maryland
TV/Projector: 9500LC Ultra / Super 02 and 03 VIM
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| Posted: Sat Dec 26, 2009 2:16 pm Post subject: |
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More untouched 1080P...
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mp20748
Joined: 12 Sep 2006
Posts: 5689
Location: Maryland
TV/Projector: 9500LC Ultra / Super 02 and 03 VIM
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| Posted: Sat Jan 02, 2010 12:52 pm Post subject: |
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More untouched 1080P!
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winduptoy
Joined: 25 Nov 2006
Posts: 187
Location: Lunenburg, Nova Scotia
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| Posted: Sun Jan 03, 2010 12:27 pm Post subject: |
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Happy New Year everyone!
Thought I'd do a few screens before I take the space heater down. Will be hooking up fan to ductwork and building hushbox. No plans to retire it in the forseeable future (although I did get a flat panel for the BR to save our necks from falling asleep on the couch)
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mp20748
Joined: 12 Sep 2006
Posts: 5689
Location: Maryland
TV/Projector: 9500LC Ultra / Super 02 and 03 VIM
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| Posted: Mon Jan 04, 2010 1:42 am Post subject: |
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A few more 1080p, but this time I lowered the saturation only. No sharpening or anything else.
getting the PJ ready for testing this coming week...
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mp20748
Joined: 12 Sep 2006
Posts: 5689
Location: Maryland
TV/Projector: 9500LC Ultra / Super 02 and 03 VIM
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| Posted: Sat Jan 09, 2010 8:51 am Post subject: |
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From the Spears and Munsil Blu Ray
100% UN-touched!
1080P into my lowly CRT
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mp20748
Joined: 12 Sep 2006
Posts: 5689
Location: Maryland
TV/Projector: 9500LC Ultra / Super 02 and 03 VIM
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| Posted: Sat Jan 09, 2010 5:02 pm Post subject: |
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More...
Planet Earth - untouched
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Sun Jan 10, 2010 6:49 am Post subject: |
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Can you see that with the naked eye or is it just your camera capturing the blend zone?
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Tech support for nothing
CRT.
HD done right!
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LOTREE
Joined: 19 Mar 2006
Posts: 401
Location: Paradise, Newfoundland
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| Posted: Sun Jan 10, 2010 7:35 am Post subject: |
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These were taken 2 years ago Jan. with my Pentax K100D 6MP. Electrohome 4500 projecting 60" on white/silver flecked fabric backing. It was a crude setup but it worked decent for the time.
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Zenith Pro 1200x | Electrohome ECP 4500 | Yamaha HTR-5740 | HTPC & Speaker build to follow
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