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x_25
Joined: 14 Jul 2008
Posts: 22
Location: Northern NJ
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| Posted: Fri Aug 15, 2008 11:25 pm Post subject: Help with resolution setup on a Sony VPH-1031 for RGB input. |
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I have a Sony VPH-1031. that I am trying to use with my computer. It supports horizontal scanning rates of 36khz and vertical up to 150 khz. Now, I know it will do 1080i, other people have done it with line doublers. I want to run a resolution of 1440x1080i into it but the best I can seem to do is get it to scroll upwards at this resolution, like the vertical hold is off. I have all front and back port at their default settings, I also tried setting them to 0. It seems that the vertical sync width is what needs to be changed, but I cant figure out what to set it to. Anyone have any in site into this?
I am useing my desktop with Dual Nvidia Geforce 7600GS's and Nvidia's drivers which allow me to set custom timings.
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scotha
Joined: 27 Mar 2006
Posts: 167
Location: Lilburn, Ga.
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| Posted: Sat Aug 16, 2008 12:11 am Post subject: |
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The 1031q that i had needed negative sync.
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pj. BD808s, BD801s
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x_25
Joined: 14 Jul 2008
Posts: 22
Location: Northern NJ
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| Posted: Sat Aug 16, 2008 1:57 am Post subject: |
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I have it set to negative sync, if you set it to positive it doesn't show anything.
Another thing I have noticed is that the picture is dimmer when I use the RGB input from a computer. It is about 65-75% as bright as with composite input, just enough that you can see it is dim and be bothered by it. Is there anyway I can increase the brightness? I have all the controls turned up.
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Brooklyn
Joined: 17 Sep 2007
Posts: 494
Location: Morgan Hill, CA
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| Posted: Sat Aug 16, 2008 2:16 am Post subject: |
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Try messing with the horizontal frequency pot.
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x_25
Joined: 14 Jul 2008
Posts: 22
Location: Northern NJ
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| Posted: Sat Aug 16, 2008 2:23 am Post subject: |
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Where would I find the horizontal frequency pot? I didn't know it had one (still new to all this. Setting these things up is a pain but well worth it.)
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x_25
Joined: 14 Jul 2008
Posts: 22
Location: Northern NJ
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| Posted: Sat Aug 16, 2008 2:38 am Post subject: |
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Something else I should add, I havn't adjusted the G2 (not even sure what it is really) nor have a focused the electron beams (the blue tube needs it a bit). But the picture is full brightness and displays right with composite input so it is something with the RGB that is the problem.
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Brooklyn
Joined: 17 Sep 2007
Posts: 494
Location: Morgan Hill, CA
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x_25
Joined: 14 Jul 2008
Posts: 22
Location: Northern NJ
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| Posted: Sat Aug 16, 2008 3:16 am Post subject: |
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Cool, thanks, looks like I have a bit of reading ahead of me.
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jkruger
Joined: 24 Oct 2007
Posts: 2435
Location: Carlsbad, CA
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| Posted: Sat Aug 16, 2008 3:19 am Post subject: |
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In today's market you might find a better class of projector at a decent price instead of pushing the 1031 to it's limits for what really will not be a quality image. It's a 7" ES, AC, analog set and if you have ever seen an 8 or 9" EM LC set you probably would make a different choice.
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x_25
Joined: 14 Jul 2008
Posts: 22
Location: Northern NJ
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| Posted: Sat Aug 16, 2008 3:28 am Post subject: |
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| jkruger wrote: | | In today's market you might find a better class of projector at a decent price instead of pushing the 1031 to it's limits for what really will not be a quality image. It's a 7" ES, AC, analog set and if you have ever seen an 8 or 9" EM LC set you probably would make a different choice. |
Well, it happens to be what I have and I got it for $60, so I am going to run it into the ground and enjoy it as much as I can.
No I still cannot see why it is dimmer with the RGB input. Would not useing a 75 ohm cable mess things up?
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jkruger
Joined: 24 Oct 2007
Posts: 2435
Location: Carlsbad, CA
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| Posted: Sat Aug 16, 2008 3:35 am Post subject: |
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That's understandable, I started with a VPH-1000Q myself. Welcome to the adventure, and enjoy your journey into the world of CRT.
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x_25
Joined: 14 Jul 2008
Posts: 22
Location: Northern NJ
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| Posted: Sat Aug 16, 2008 3:36 am Post subject: |
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| jkruger wrote: | | That's understandable, I started with a VPH-1000Q myself. Welcome to the adventure, and enjoy your journey into the world of CRT. |
I have been for a few months and will continue too. I just wish this VGA thing worked right.
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x_25
Joined: 14 Jul 2008
Posts: 22
Location: Northern NJ
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| Posted: Sat Aug 16, 2008 3:59 am Post subject: |
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I just thought of something, I am useing a really cheep VGA extension cord to run the VGA to my projector (modified with a DB25 on the end) It is 6ft long and has no shielding, no twisted pares, nothing. Is it possible that the cable is attenuating the signal and causing the loss in brightness?
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jkruger
Joined: 24 Oct 2007
Posts: 2435
Location: Carlsbad, CA
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| Posted: Sat Aug 16, 2008 4:15 am Post subject: |
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Yes indeed, a cable could be the cause of such a thing. Higher resolutions usually require better cabling and better signals than standard video.
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x_25
Joined: 14 Jul 2008
Posts: 22
Location: Northern NJ
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| Posted: Sat Aug 16, 2008 4:19 am Post subject: |
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| jkruger wrote: | | Yes indeed, a cable could be the cause of such a thing. Higher resolutions usually require better cabling and better signals than standard video. |
The dimming is with any input I use on the VGA. I will have to grab a cable off a monitor someone is throwing out and use that instead of this cheep one. If that fixes my problem I am set (as far as brightness).
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Dave Lister
Joined: 16 Jan 2007
Posts: 436
Location: Adelaide, South Australia
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| Posted: Sun Aug 17, 2008 3:19 pm Post subject: |
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Are you using the computer input on the 1031 or the 5 bnc connections marked RGBHV?
I am not 100% sure but the computer input is made for the old 1980's computers and not as good, try using a VGA to 5 x BNC breakout cable to connect through the RGBHV inputs.
Make sure you can set the resolution on your PC before you connect it to the projector as the projector does not have overscan protection and you will fry it within seconds if you send it a signal it cannot handle.
If you can use a monitor on the second graphics card set as your default monitor then start your PC using that monitor and once it is running set the resolution and refresh rate (vertical refresh rate is measured in Hz not kHz, horizontal scan rate is measured in kHz) making sure it is set correctly for the projector, then switch on the projector and set your video software to use the graphics card the projector is using for playback.
Do not set your horizontal scan rate above 36kHz or you will fry the projector.
The vertical refresh rate of 150Hz is for the lowest resolution of 640 x 480, at 1440 x 1080i you will probably only get 50Hz or 60Hz.
Make sure the resolution you send to the projector is interlaced and not progressive scan, it can do 1080i not 1080p.
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Owner of a VPH1000QM with over 80,000 hours on the tubes.
Beat that you digital technicolour flashlight owners.
Stuff for sale;
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x_25
Joined: 14 Jul 2008
Posts: 22
Location: Northern NJ
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| Posted: Sun Aug 17, 2008 4:52 pm Post subject: |
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| Dave Lister wrote: | Are you using the computer input on the 1031 or the 5 bnc connections marked RGBHV?
I am not 100% sure but the computer input is made for the old 1980's computers and not as good, try using a VGA to 5 x BNC breakout cable to connect through the RGBHV inputs. |
It does not have a 5 BNC RGB input but it has two RGB inputs. Once is a 9 pin input for use with computers the other uses a DB25 connector and is made for normal RGB inputs.
| Quote: | | Make sure you can set the resolution on your PC before you connect it to the projector as the projector does not have overscan protection and you will fry it within seconds if you send it a signal it cannot handle. |
I am well aware of this and I make sure that the output is correct.
| Quote: | | If you can use a monitor on the second graphics card set as your default monitor then start your PC using that monitor and once it is running set the resolution and refresh rate (vertical refresh rate is measured in Hz not kHz, horizontal scan rate is measured in kHz) making sure it is set correctly for the projector, then switch on the projector and set your video software to use the graphics card the projector is using for playback. |
I don;t know why I didn't think of that. I will do that.
| Quote: | Do not set your horizontal scan rate above 36kHz or you will fry the projector.
The vertical refresh rate of 150Hz is for the lowest resolution of 640 x 480, at 1440 x 1080i you will probably only get 50Hz or 60Hz.
Make sure the resolution you send to the projector is interlaced and not progressive scan, it can do 1080i not 1080p. |
I am keeping the refresh rate a 60hz and am trying 1440 by 1080i, but I eather seem to get a garbled mess, the picture scans up like the vertical hold is off, or I end up with multiple copies of the image from left to right.
Thank you for your help.
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robnec
Joined: 27 Apr 2006
Posts: 87
Location: NYC
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| Posted: Sun Aug 17, 2008 6:16 pm Post subject: |
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Hello. I also had many problems with 1080i resolution and 1031. All of them were solved when I started using Extron 202 interface in the signal path. You are trying to use current computer with over twenty years old projector. Try Extron. The great picture, if you keep the screen size reasonable, will be your reward. Robert.
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