CurtPalme.com Home Theater Forum

MacGyverismo · Joined: 23 Sep 2013 Posts: 12

Hi all,

I'm trying to get the most out of my Barco 701mm, to that end I'm experimenting with finding the optimum resolution.
Unfortunately this is a rather frustrating process and I was wondering if you could give me some pointers.

The beamer has no problems with Pal 720x576@50(i/p), or 1024x576 for that matter. I'm running it at 1024x576@100i for now as it seems sharper than 50p~~, but the specs say it shouldn't even to that..~~

I'm trying to see if I can get it to lock at 1920x1080. I have the most difficulties with selecting the right vertical timing.
I wrote a few calculators to get some sort of timing, but I seem to have the best succes with trying to keep the relative timings the same as for the working PAL timing. So that the sync pulse widths should remain the same.

Now I would like to know what kind of magic makes the barco lock to a signal. Is it pulse width? Is it scan rates? voodoo?

any help would be appreciated Smile

Tim in Phoenix · Joined: 21 Oct 2006 Posts: 4409 Location: Phoenix

Hello

You will need to live within the horizontal scan rate limits of the 701. 1080i is 33.5khz, 1080p is 67khz

**Curt Palme** · Posted: Tue Feb 25, 2014 11:29 pm Post subject:

Is it a Data or a Vision 701mm?

MacGyverismo · Joined: 23 Sep 2013 Posts: 12

I think it's a Vision 701mm, so H 15-50, V 37-210 if I'm not mistaken.

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

PAL is only via composite or s-video, its just a colour encoding type. It can be a number of different resolutions and V rates, but always 15.7kHz H rate.

Isnt the Vision model limited to 36kHz H rate? It should still do 1080i at both 50Hz and 60Hz

MacGyverismo · Joined: 23 Sep 2013 Posts: 12

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

Youre obviously on progressive there, 67.49kHz is 1920x1080p at 60Hz.

Try doing 1280x720p at 50Hz and also at 60Hz and see if itll do that.

MacGyverismo · Joined: 23 Sep 2013 Posts: 12

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

Why i you doing this the hard way? What video card brand are using?

MacGyverismo · Joined: 23 Sep 2013 Posts: 12

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

Ok, youre going about it all the hard way. Just use Windows and its easy.

MacGyverismo · Joined: 23 Sep 2013 Posts: 12

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

Its not a matter of perspective, the only reason Windows wont do this for you is operator error. If i wanted to go back to a chisel and stone tablet id stop using Windows and use one of the others... But i dont.

MacGyverismo · Joined: 23 Sep 2013 Posts: 12

The thing I'm trying to achieve, is to deliver a correct display format to the beamer, the software used is just a tool in this matter. Due to the way the beamer is connected ( rgbhv - vga ) the software can't help me with this, even if it wanted to. There is just no way for the beamer to instruct the computer what kind of signal it would like to receive.

So that makes it the operators responsibility, but the operator is confused because not all formats which should theoretically be within the limits of the beamer are accepted, which is the reason for my initial question Wink

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

Beamer? Over here, youd be talking about a BMW... Laughing

Like i said earlier, if you use Windows, there are at least two programs i know of without searching that will do all this work for you very easily. All you need to do is tell it what res and refresh you want, select manual timings, or select from standard LCD timings or CRT timings. Its really quite easy to do.

If im understanding you correctly, youre trying to create an EDID for a monitor that doesnt exsist, there will be no EDID connection, so the computer may or may not see the device as a non plug and play monitor. If it sees it as plug and play, there should be a huge selection of available resolutions.