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Discussion Starter · #1 ·
I thought I would post a solution to a problem that I had with my new Optoma HD66 and my HTPC. It is a 120hz 720p 3D ready projector, that has a native resolution of 1280x800.


I needed 720p output as I have a 16:9 screen. When I would go and hook up the projector, it misreads it as an EW536 instead of a HD66. If you choose 720p under the standard windows, it frames it in at about 1150x650.


When I opened the CCC control panel, and chose 59hz or 120 hz, it would display, but would suffer signal drop offs.


The solution was to load powerstip, and manually set it to 45 horizontal and 60 vertical. 120hz doesn't work still without flickering. It could be my HD2600pro or it could be the calbe that I am using... about 20'


No I haven't bothered with the 3D yet.
 

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Do they have 3D content out? Besides what is on TV (say a station hosts a show/commercial in 3D).
 

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Instead of using powerstrip did you try changing the overscan compensation slider in CCC to 0% underescan from it's normal default value of 15%?

What version of 3D does the projector accept? If it is the Nvidia verssion that it may only accept 120fps content using a dual link DVI connection and would require the Nvida 3D compatible application on the PC to send it. Otherwise sending either 1080i or 1080p should be no problem.
 

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Discussion Starter · #4 ·

Quote:
Originally Posted by walford /forum/post/18174847


Instead of using powerstrip did you try changing the overscan compensation slider in CCC to 0% underescan from it's normal default value of 15%?

What version of 3D does the projector accept? If it is the Nvidia verssion that it may only accept 120fps content using a dual link DVI connection and would require the Nvida 3D compatible application on the PC to send it. Otherwise sending either 1080i or 1080p should be no problem.

It was already set at 0%. It still did it. Funny thing is that it was the correct size at 59 and 120, but had sync issues with signal loss.


It was just 1280x720p 60hz that was not working right.


I really want to get 720p 120hz working correctly, but I am just having problems keeping it synced. Strange thing is that it ges worse when video is played.
 

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Your 1280x800 native resolution PJ has a 16:10 aspect ratio not a 16:9 aspect ratio. This resolution is very commong for many PJs and PC monitors since you can display 2 8-1/2 by 11" document pages side by side without distortion. I believe this is why you are having problems when you send it 1280x720 16:9 content.
 

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Discussion Starter · #6 ·

Quote:
Originally Posted by walford /forum/post/18177236


Your 1280x800 native resolution PJ has a 16:10 aspect ratio not a 16:9 aspect ratio. This resolution is very commong for many PJs and PC monitors since you can display 2 8-1/2 by 11" document pages side by side without distortion. I believe this is why you are having problems when you send it 1280x720 16:9 content.

actually no. If you send it 720p, it only displays 16:9 as it outputs the other 80 lines with "black" light when set to native. There is a whole discusson of this on the HD66 thread.


Furthermore, the 1280x800 is not compatible with a 120mhz input. When you send out 3D is can only use 720p. The 800 is just for 2D, but 720p is an option. The maximum supported refresh rate for 120hz is 720p.


1280x800 is 60hz.


Yes I know the display is 120hz regardless.
 

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Are you sure that the projector is designed to accept 120Hz content for other then Nvidia 3D videos when using a dual link DVI conection? There are several 120 HZ 3D PC monitors now on the market that have this restriction and one link is used for 60Hz for the left eye and the other link for 60Hz for the right eye.
 

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Discussion Starter · #8 ·

Quote:
Originally Posted by walford /forum/post/18181754


Are you sure that the projector is designed to accept 120Hz content for other then Nvidia 3D videos when using a dual link DVI conection? There are several 120 HZ 3D PC monitors not on the market that have this restriction and one link is used for 60Hz the left eye and the other link for 60Hz the right eye.

The projected is hardcode to enable 3D when receiving this frequency regardless of source. It could be a SA and it does the same thing. We are hoping for a firmware update down the road.
 
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