Author Topic: Making an RGB amp  (Read 1383 times)

Tatsujin

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Re: Making an RGB amp
« Reply #45 on: November 23, 2013, 05:06:09 PM »
ah, those Tex screenies bringing back some oold memories :D
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pnauts

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Re: Making an RGB amp
« Reply #46 on: November 23, 2013, 06:32:48 PM »
Wow, good eye on the missing pulse
You saw it right
The 240P is the same field sent every scan 30fps

Sent from my ADR6300 using Tapatalk 2

I'm wondering if this missing pulse is not source of my problem ?
can we talk about a hardware design fault ???
the "funny" thing is that it works with TV with scart input, a digital projector would be definitively more sensitive than old electron beam from analog TV  :lol:
Thesteve, I'm not sure of understanding, same field between 2 Vsync in 240p ??
when I use signal in straight mode, the image is centered on screen and the status signal the projector display is 480i, Vsync=15.732 Khz and Hsync=59.97Hz so, I thought that the output of the console was something like:
120 black lines then 240 usefull lines then 120 black lines.
So is XRGB fed with RGBS signal would make the deal and output "another" resolution image to use it on videoprojector ?
« Last Edit: November 23, 2013, 06:36:53 PM by pnauts »

thesteve

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Re: Making an RGB amp
« Reply #47 on: November 24, 2013, 07:34:50 AM »
The tv standard was 480i, meaning the tube scanned 240 lines top to bottom, then rescanned with a slight offset to fill in between the lines of the first scan
Most games ran without the offset, causing the scanline effect and twice the frame rate
This worked great on CRT, but digital video processors have issues with it

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pnauts

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Re: Making an RGB amp
« Reply #48 on: November 24, 2013, 08:12:26 AM »
ok thanks. And about Xrgb ?
could it be a solution ?

pnauts

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Re: Making an RGB amp
« Reply #49 on: November 25, 2013, 09:40:35 AM »
I'd just learn there is /HSync and /Vsync on VDC, I'll give it a try.

thesteve

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Re: Making an RGB amp
« Reply #50 on: November 25, 2013, 09:55:44 AM »
XRGB is a solution

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pnauts

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Re: Making an RGB amp
« Reply #51 on: November 25, 2013, 06:29:03 PM »
thanks.

pnauts

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Re: Making an RGB amp
« Reply #52 on: November 25, 2013, 11:53:09 PM »
I check with oscilloscope, this is well true /Vsync and /Hsync.
I'll test tomorrow evening but I'm think it's because my projector don't like 240p.

pnauts

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Re: Making an RGB amp
« Reply #53 on: November 27, 2013, 05:11:38 AM »
Good news ! it works !!  :mrgreen:

pnauts

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Re: Making an RGB amp
« Reply #54 on: November 27, 2013, 09:49:22 AM »
screen width 2M40:

composite:


RGB:


compo:


RGB:


compo:


RGB:


compo:


RGB:


compo:


RGB:


composite:


RGB:

compil3r

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Re: Making an RGB amp
« Reply #55 on: January 10, 2014, 10:52:30 AM »
What do you guys think of these ones being sold at eBay? (besides it's pricey)



http://www.ebay.com/itm/390596193140?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649

thesteve

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Re: Making an RGB amp
« Reply #56 on: March 05, 2014, 05:57:36 PM »
wow, thats awsome
way overpriced
listed as refurb
looks like off the shelf parts except for the bus connector

wolfman

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Re: Making an RGB amp
« Reply #57 on: March 06, 2014, 04:56:41 AM »
Everything from otakus store seems pricey....
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munchiaz

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Re: Making an RGB amp
« Reply #58 on: March 06, 2014, 05:11:48 AM »
would that work on a PC duo R

Fidde_se

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Re: Making an RGB amp
« Reply #59 on: March 06, 2014, 07:13:56 AM »
would that work on a PC duo R
Nope!
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