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benareeno
Joined: 22 Mar 2006
Posts: 1614
Location: ottawa, canada
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| Posted: Sat Aug 31, 2013 1:15 am Post subject: perhaps it's not streaking...strange raster noise on barco 7 |
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I guess I'll have to snap a pic...but, before I do...let's see if anyone has any thoughts.
It seems like I may get a sweep of raster noise which shows up as something like streaking. Only lasts a second or two and then its gone.
I initially thought it was only in mixed bright/dark scenes. But it may happen at any time.
After the projector was on a few hours, it seemed to dissipate. EIther that, or I didn't notice it anymore.
Is this a Barco thing?
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joatmon
Joined: 17 Mar 2009
Posts: 127
Location: Ottawa, Ontario
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| Posted: Mon Sep 02, 2013 2:25 pm Post subject: |
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Ben, is this is the streak you are talking about during dark scenes that shows up (only) at the top of the image?
http://www.curtpalme.com/forum/viewtopic.php?p=252286&highlight=#252286
I could never dial it out. I worked around it by minimizing it as best I could and then put up a black velvet border around my screen. I project the crappy part onto the border... problem solved.
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Entertained by a Runco DTV-940 (aka Barco Cine7/708)
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benareeno
Joined: 22 Mar 2006
Posts: 1614
Location: ottawa, canada
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| Posted: Thu Sep 05, 2013 4:51 am Post subject: |
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that just might be it...I think it might move too.
I redid G2...I'll watch some scenes tonight and see if I can pinpoint it a bit more.
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ElTopo
Joined: 07 Nov 2006
Posts: 1640
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| Posted: Thu Sep 05, 2013 8:47 am Post subject: |
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I would be interested in results as well.
ElTopo
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Barco Cine 9 the one and only
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BGSPCS
Joined: 23 Aug 2006
Posts: 115
Location: Pottstown, PA
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| Posted: Thu Sep 05, 2013 12:34 pm Post subject: |
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I'd be interested to see a video or photo of what you are experiencing. I have had a Cine 7 for a few years, and i did have the normal horizontal black streaks which was more dependent on input source than anything. I have recently replaced the Cine 7 with a Zenith 1200x that i got from Curt 
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Brad S
Pottstown PA
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joatmon
Joined: 17 Mar 2009
Posts: 127
Location: Ottawa, Ontario
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| Posted: Thu Sep 05, 2013 1:08 pm Post subject: |
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| benareeno wrote: | that just might be it...I think it might move too.
I redid G2...I'll watch some scenes tonight and see if I can pinpoint it a bit more. |
If the band/streak you see is only at the top, as it is on mine, the dark band will move with the blanking control. The G2 control will adjust the height of the dark band. The band does not start at a bright spot, it is uniform from left to right. In my prior thread, the output of my Playstation3 is in dim mode when I took that photo of the green tube.
As indicated earlier, I don't see the problem on my screen anymore because of how I worked around it. With the upper blanking control fully open (and left fully open all the time), I project this image from AVS HD 709 disc:
and then adjust such that the visible part on the screen is at the 5% overscan marks for 1080i (2.5% for 720p) and the remainder spills onto my black velvet border. The left/right/bottom blanking can be used as it doesn't affect the location of the dark band.
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benareeno
Joined: 22 Mar 2006
Posts: 1614
Location: ottawa, canada
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| Posted: Fri Sep 06, 2013 6:36 pm Post subject: |
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One thing I seem to notice...the issue or streaks or whatever it is I see...seems to happen more often, or is more obvious at 480p than 720p.
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joatmon
Joined: 17 Mar 2009
Posts: 127
Location: Ottawa, Ontario
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| Posted: Fri Sep 13, 2013 3:24 am Post subject: |
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Ben, any chance your video source is the problem? I could bring my Fury2 and PS3 over to try it on yours (now that you know mine doesn't streak). Just throwing the idea out there, not sure if it makes sense as you've probably used the same source gear with past projectors you owned.
_________________
Entertained by a Runco DTV-940 (aka Barco Cine7/708)
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benareeno
Joined: 22 Mar 2006
Posts: 1614
Location: ottawa, canada
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| Posted: Sat Sep 14, 2013 3:26 am Post subject: |
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well...the last few nights, with 720p...no real streaking. No big problems. Seems to be more of a factor with 480p. And I'm not sure I would go back to 480p considering my new bigger screen size.
If it creeps back into play, I'll look into it more.
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sat Sep 14, 2013 4:56 am Post subject: |
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My Cine 9 does the same thing at a couple resolutions. Change the timings to move the image in the raster so its lower.
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benareeno
Joined: 22 Mar 2006
Posts: 1614
Location: ottawa, canada
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| Posted: Sat Sep 14, 2013 5:20 am Post subject: |
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interesting...with my new screen, I already had to do that. Maybe it was resolved by this...
I had previously done a floor mount so I had to place the image up high...now I'm doing zero keystone just behind the seating area....good tip!
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sat Sep 14, 2013 6:00 am Post subject: |
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You still need the image centered on the tube face.
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