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97ss150
Joined: 19 Dec 2007
Posts: 161
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| Posted: Fri May 09, 2008 5:49 pm Post subject: ideal resolution?!?! |
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i have a 9+ pg, i am hooking up a pc to it. i am unsure what resolution to run on it using it as reg pc. and then i am curious to see what i should set it at to watch movies and all on. i know there are a million variables. but just in general. also i am about to hang it up finally and will be inverting the pic and all  hours of frustrating fun
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Jesse S
Joined: 12 May 2007
Posts: 209
Location: Etobicoke
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| Posted: Fri May 09, 2008 5:51 pm Post subject: |
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1280x720 71.928hz
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David_Web
Joined: 02 May 2007
Posts: 418
Location: Sweden
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| Posted: Fri May 09, 2008 5:56 pm Post subject: |
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I would run 1920*1080i@96
If I have the logic right the higher the scanrate the more you will save the tubes.
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SNR of people are ridiculously low.
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kschmit2
Joined: 09 Mar 2006
Posts: 1141
Location: Heidelberg, Germany
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97ss150
Joined: 19 Dec 2007
Posts: 161
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| Posted: Fri May 09, 2008 8:04 pm Post subject: |
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ok so what would be a good video card to run that high a res at?
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Heywood Jablome
Joined: 12 Mar 2006
Posts: 1548
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| Posted: Fri May 09, 2008 8:23 pm Post subject: |
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I'm no HTPC expert, but nVidia's PureVideo hardware scaling is supported in the better DVD playback software.
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"Those countries which lag behind in industry, in the application of mechanics and technical chemistry, in the careful selection and utilization of natural products, where the respect for such activities does not permeate all classes of society, will unfailingly decline in prosperity. They will sink faster when neighbor states, with an energetic exchange between science and industry, go forward with renewed vitality."
-- Baron Alexander von Humboldt: 1769-1859
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David_Web
Joined: 02 May 2007
Posts: 418
Location: Sweden
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| Posted: Fri May 09, 2008 10:37 pm Post subject: |
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Why not?
The beam sweeps over the phosphor faster thus spending much less time in the same place. It will get less hot under that shorter time and the heat will not damage it as bad.
The glass and glycol has little effect on the temperature the phosphor gets then the beam is on it as it simply is not fast enough to react.
So you could say that instead of having to heat up to 200*c once it will heat up to 100*c twice in the same amount of time. (temperatures for illustration only)
If it wasn't the brightness would increase as you increase the scanrate.
So with my theory you would drive the tubes less hard with higher scanrates.
But that's only what my simple brain can come up with given the limited amount of knowledge it has. So it might be total bs. I don't know.
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SNR of people are ridiculously low.
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kschmit2
Joined: 09 Mar 2006
Posts: 1141
Location: Heidelberg, Germany
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| Posted: Sat May 10, 2008 9:12 am Post subject: |
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if you want full control over timings you have to take ATI cards.
Nvidia 8xxx/9xxx cards are no longer supported by Powerstrip.
Also, ATI's video processing is superior to Nvidia's, but the differences in that area are so small that you shouldn't base your decision on that alone.
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kschmit2
Joined: 09 Mar 2006
Posts: 1141
Location: Heidelberg, Germany
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| Posted: Sat May 10, 2008 9:36 am Post subject: |
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There is nothing to even worry about when driving the PJ at 1080i96.
That's roughly 57 KHz scanrate, and not even remotely close to driving the NEC hard. It does not even matter whether you have a 6PG or a 9PG, as both chassis are theoretically capable (just minor differences in the firmware) of running 90 kHz+
My 6PG Plus has exhaust temps slightly above ambient temperature when running 1080i96.
If you are worried about temps (which you always should be), make sure that there is at least 12" of clearance above the PJ when it is celing mounted. This will greatly reduce overall temps inside the PJ.
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David_Web
Joined: 02 May 2007
Posts: 418
Location: Sweden
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| Posted: Sun May 11, 2008 8:06 am Post subject: |
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So am I wrong in my logic or not?
I really want to know.
Any one knowledgeable in the matter?
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SNR of people are ridiculously low.
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Heywood Jablome
Joined: 12 Mar 2006
Posts: 1548
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| Posted: Sun May 11, 2008 12:21 pm Post subject: |
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This was kicked around on AVS once upon a time, and the resident physicist Chiem provided a full analysis, with charts and everything!
I had proposed refrigerating the cooling fluid with something like a pelteir junction, and at the end of the thread it was decided that "burn" is not really "burn" (which is to say, some volitile organics are becoming carbon under the intense HEAT of electron bombardment.)
IIRC, the "burn" that chemical phosphors suffer is actually a chemical change accellerated by the electron bombardment, and is relatively independent of temperature. (Obviously, running with no coolant at all leads to catastrophic failure.)
I'll try to google up that thread.
_________________
"Those countries which lag behind in industry, in the application of mechanics and technical chemistry, in the careful selection and utilization of natural products, where the respect for such activities does not permeate all classes of society, will unfailingly decline in prosperity. They will sink faster when neighbor states, with an energetic exchange between science and industry, go forward with renewed vitality."
-- Baron Alexander von Humboldt: 1769-1859
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scdg124
Joined: 01 Jan 2007
Posts: 69
Location: Louisville, KY
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| Posted: Sun May 11, 2008 2:34 pm Post subject: |
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| kschmit2 wrote: | My 6PG Plus has exhaust temps slightly above ambient temperature when running 1080i96.
If you are worried about temps (which you always should be), make sure that there is at least 12" of clearance above the PJ when it is celing mounted. This will greatly reduce overall temps inside the PJ. |
What if the PJ is table mounted?
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Who's more foolish?..The fool or the fool who follows?
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Phil Smith
Joined: 08 Mar 2006
Posts: 7717
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| Posted: Sun May 11, 2008 2:53 pm Post subject: |
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I think everyone is overlooking an important component: What is the video source? If it's just SD, there's no advantage to scaling it up beyond 1280x720@72.
What's the bandwidth for 1280x720@72? 57KHz for 1080i@96 does seem like a doable bandwidth for most PJs, right? I'll have to give 1080i@96 a try when I set my HTPC up for Blu-ray, something I'll be doing in this summer.
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Person99
Joined: 09 Mar 2006
Posts: 4899
Location: Flower Mound, TX
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| Posted: Mon May 12, 2008 4:57 pm Post subject: |
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| Phil Smith wrote: | | I think everyone is overlooking an important component: What is the video source? If it's just SD, there's no advantage to scaling it up beyond 1280x720@72. |
I'm inclined to agree with Phil here. The only thing that gives me pause is that I like to optimize spot shape on an 8" for 1080i so 720p is a little be softer.
| Phil Smith wrote: | | What's the bandwidth for 1280x720@72? |
The scanning frequency for this is about 55 KHz. The bandwidth required is about 33 MHz.
| Phil Smith wrote: | | for 1080i@96 does seem like a doable bandwidth for most PJs, right? |
Right. The scanning frequency for this is about 55 KHz, the bandwidth required is about 50 MHz. You can also try 1080i/72 to see if you can tell a difference between 96 and 71. 72 only requires about 37 MHz of bandwidth so will give you a slightly sharper picture since you'll have more overhead. For instance, my Onyx had 3 times the bandwidth necessary for 1080i/72, but only a bit over 2x the bandwidth required for 1080i/96. Personally, I could not tell a difference in sharpness with content.
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Dave
A train station is where the train stops. A bus station is where the bus stops. On my desk, I have a work station....
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Phil Smith
Joined: 08 Mar 2006
Posts: 7717
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| Posted: Mon May 12, 2008 10:04 pm Post subject: |
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| Person99 wrote: | | Phil Smith wrote: | | I think everyone is overlooking an important component: What is the video source? If it's just SD, there's no advantage to scaling it up beyond 1280x720@72. |
I'm inclined to agree with Phil here. The only thing that gives me pause is that I like to optimize spot shape on an 8" for 1080i so 720p is a little be softer. |
Good point Dave, but not relevant if the OP doesn't have an HD source, which is why I ask.
But maybe my question was kind of dumb, now that I think about it. I guess it's really safe to assume that anyone that's into HT enough to post on this forum has an HD source. There's really no reason now days NOT to have HD - as easy and inexpensive as it is to get in one form or another.
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97ss150
Joined: 19 Dec 2007
Posts: 161
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| Posted: Thu May 15, 2008 10:15 pm Post subject: |
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i have an xbox 360 hooked up to it and a dish network hd reciever. but tv is so dark on this thing it sucks to watch on it i dunno what thats about
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Mark_A_W
Joined: 15 Mar 2006
Posts: 3068
Location: Sunny Melbourne Australia
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| Posted: Fri May 16, 2008 5:49 am Post subject: |
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It's not clamping black properly.
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97ss150
Joined: 19 Dec 2007
Posts: 161
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| Posted: Fri May 16, 2008 12:17 pm Post subject: |
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so what should i be looking for?
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