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Discussion Starter · #1 ·
I am learning more and more but this noob needs a bit of help.


I just built my HTPC, I just read what seems like thousands of posts over maybe a total of 3 days of reading and I could not find how to get beyond the 640x480 @ 60Hz default setting.


I have my desktop showing up on a Hitachi 57S700 RPTV. I cannot see the full desktop-just a bit cut off (overscan?) all around, it's a bit fuzzy, and not sure the best direction to take.


After all this reading it seems, with all the software options, that there are a few ways to fix this. I'm just not sure what the best software combo to go with (nor could I find timings, specifically powerstrip, for my particular RPTV.


Being I have a popular RPTV, I am hoping someone is successfully using a HTPC (with an ATI card) with it.



Thanks!


Drew,


Abit AN7

AMD 2k CPU

ATI 9600xt vid. card

Hitachi 80GB drive

etc.
 

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I own the Hitachi T600, which is basically the same model as your set. I do not have a HTPC, but I couldn't resist the temptation to hook up my pc to it when I first got it. I have a Nvidia card, so thats different, but all I did was plug the DVI out of my card into the DVI in of my set. My PC recognized the set, and adjusted the resolutions accordingly. I think I was able to get something like 1440xsomething, all I know is my desktop looked good, and it only cropped a small portion of the top and bottom. Maybe this is a stupid queation, but you are using DVI, right?
 

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I have a s500 connected to my 9800pro w/dvi. With straight 4.10 cats I can get 1280*720p and 1920*1080i. With the help of powerstrip I can add 1776*1000 and get much tighter on the overscan.



kev
 

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Discussion Starter · #4 ·
Thanks guys,


Kev,


I played with powerstrip for quite a while and the only thing I got to work is the ATI HDTV resolutions such as 864x486 @ 59Hz (and a scan rate of 34.432 and refresh of 61.216Hz). This one fills the screen nicely. After adjusting the "screen position & Size" using the blue arrows I am left with only about a 1/2" black bar on top and bottom.


I started up Meedio to specifically play a DVD. The picture as well as the desktop is a bit fuzzy. Next I'll be searching around here to fix that next. The picture while being average, it left me with about 6-7" of black bars on top and bottom.

I also tried a free version of Powerstrip that shipped with a cd-rom drive and the picture quality was very bad. Very pronounced jagged edges on everything diagonal.


I compared this to my Sony DVD player and it scaled the image better leaving only about 3" top and bottom and had a much sharper image.


I tried this original 720x480 then later tried 640x480 and both were the same with DVD playback.


I'm not sure what to do next other than to continue searching here and doing a heck of a lot more reading.


Just a bit frustrated....

Drew,
 

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Discussion Starter · #5 ·
I forgot to mention, with larger resolutions my desktop shrank to the point that it was unreadable (and others left my Hitachi 57S700 with a blank screen) and when I found a larger res. that I could barely read I noticed the scan rate was going up with the resolution.


I read somewhere that the Hitachi likes/requires a scan rate of 33 or 34.


???


Oh and I am using the 4.9 ATI drivers.
 

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Here is what I am currently running.



PowerStrip timing parameters:

1280x720=1280,208,40,296,720,4,5,23,74250,1


Generic timing details for 1280x720:

HFP=208 HSW=40 HBP=296 kHz=41 VFP=4 VSW=5 VBP=23 Hz=55


Linux modeline parameters:

"1280x720" 74.250 1280 1488 1528 1824 720 724 729 752 +hsync +vsync



I am assuming you know how to input custom settings. If you don't, I suggest the 101 guide to powerstrip at htpcnews.com.



kev
 

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Discussion Starter · #7 ·
Thanks Kev,


I am reading about it in another thread so I think I'll be fine.


Something I haven't specifically seen addressed just yet is the sharpness of the picture.


I feel I am getting much closer but I am not seeing the light at the end of the tunnel. Once I get the correct resolution/timing figured out will this give me the picture I have been wanting?

I'll most likely have to switch between 2 different settings depending upon weather or not I am on the desktop or watching a DVD ...correct?
 

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i have an s700 and use a 960x540 res for everday surfing and viewing of sagetv. i use 1920x1080i for dvd playback.


the tv looks fuzzy if you don't hit it's native res. 1280x720p looks pretty bad and straying too far away from 59.94hz on the frequency side of things yields fuzzy results or causes loss of tight convergence.
 

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Quote:
Originally posted by gbrnole
i have an s700 and use a 960x540 res for everday surfing and viewing of sagetv. i use 1920x1080i for dvd playback.


the tv looks fuzzy if you don't hit it's native res. 1280x720p looks pretty bad and straying too far away from 59.94hz on the frequency side of things yields fuzzy results or causes loss of tight convergence.



Same exact res setup here.



kev
 

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Discussion Starter · #10 ·
I have now found 920x500p to fit my screen perfectly. Once I can get the family away from the set for a while I'll try 960x540.


Native Resolution is the ticket. I'm not sure exactly what that is though for the 57S700.


Karnis once commented the the Mitsu. sets like 33.75 and Hitachi closer to 33.5Hz, but does anyone really know, and what difference does it really make?


So far today is the third day after connecting my HTPC for the first time.

I have a perfect desktop image of 920x500p. Direct from Powerstrip:


PowerStrip timing parameters:

920x500=920,104,80,80,500,20,1,42,39996,1


Generic timing details for 920x500:

HFP=104 HSW=80 HBP=80 kHz=34 VFP=20 VSW=1 VBP=42 Hz=60


Linux modeline parameters:

"920x500" 39.996 920 1024 1104 1184 500 520 521 563 +hsync +vsync
 

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The Hitachi is a HD TV optimised for 1080i timing.

540p is VERY low resolution for such a display, what a waste.


Try using 1776x1000 (1080i timing). Text will be to small so you will need to set your desktop to 120DPI and large fonts. Don’t use extra large fonts as it will cause problems with some windows screens.


1440x960 can also be used if you get to much overscan with 1776x1000.


If you sit a long way from the screen it wont matter to much but if like me, you view from about 9’ you need all the scan lines you can get.



Regards,


Owen
 

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1440x960 is not a good choice on the hitachi because it wants to convert everything to a 1080i resolution so unless you are using an ati card and powerstrip the 960 res gets the same fuzzy look as is afflicted on the 720p res since the set scales it over again to 1080i.


1920x1080i, 1776x1000i, 960x540p and 920x500p are the optimal resolutions to use for this tv depending on the video card you have installed.
 
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