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<blockquote data-quote="KevL" data-source="post: 25713" data-attributes="member: 11798"><p>Hi</p><p></p><p>Dont visit this site often but here goes.</p><p></p><p>Your graphics card can produce RGB and sync signals. You can connect the RGB and composite signals to your TV directly.</p><p></p><p>If you have a radeon card then you can set it to produce a composite sync directly (No H +V sync to Composite sync converter required). </p><p></p><p>You need to get hold of an app called Powerstrip (well worth the asking price). This will allow you to set the 720x576 (for pal) at 25Hz interlaced signal for a standard TV or 50HZ for a progscan TV. You need to set video for 625lines (576 active lines) for UK and something else (525lines (480 active for NTSC US?????)</p><p></p><p>Powerstrip can also enable the composite (H+V) sync signal on your VGA card so that the lead is a simple 4 x 75Ohm coax link .</p><p></p><p>You need to make a lead up with the VGA connector at one end and scart at the other.</p><p></p><p>If you dont have an ATI graphics card then you can make an H+V sync to composite sync convertor.</p><p></p><p>Search the web for details on "powerstrip" and "VGA to scart lead" The latter info will show you the scart pins and VGA pins to connect in each of the 4coax links). Buy decnet 75ohm coax (thin is more convenient as you will be limited by scart connector cable diameter)</p><p></p><p>With this arrangement you can get the benefit of the very high quality DACs present on even cheap VGA cards which will outperform many DACS found in high end AV equipment. AV equipment can get away with fairly low speed DACs as the PAL or NTSC signals have fairly limited bandwidths. 1600x1200 displays at 100Hz - on even cheap VGA cards -need significantly faster DACs.</p><p></p><p>Note 50Hz refresh rate (for prog scan) will look horrible (lots of flicker) on a normal pc monitor but will be fine on a TV which have a slower phosphor. </p><p></p><p>I use this technique to connect VGA to a hardware colourspace convertor which takes RGB and converts to YUV as my crappy TV only takes a progscan signal in YUV format. Works fine.</p><p></p><p></p><p>Hope this helps. </p><p></p><p></p><p>Kev</p></blockquote><p></p>
[QUOTE="KevL, post: 25713, member: 11798"] Hi Dont visit this site often but here goes. Your graphics card can produce RGB and sync signals. You can connect the RGB and composite signals to your TV directly. If you have a radeon card then you can set it to produce a composite sync directly (No H +V sync to Composite sync converter required). You need to get hold of an app called Powerstrip (well worth the asking price). This will allow you to set the 720x576 (for pal) at 25Hz interlaced signal for a standard TV or 50HZ for a progscan TV. You need to set video for 625lines (576 active lines) for UK and something else (525lines (480 active for NTSC US?????) Powerstrip can also enable the composite (H+V) sync signal on your VGA card so that the lead is a simple 4 x 75Ohm coax link . You need to make a lead up with the VGA connector at one end and scart at the other. If you dont have an ATI graphics card then you can make an H+V sync to composite sync convertor. Search the web for details on "powerstrip" and "VGA to scart lead" The latter info will show you the scart pins and VGA pins to connect in each of the 4coax links). Buy decnet 75ohm coax (thin is more convenient as you will be limited by scart connector cable diameter) With this arrangement you can get the benefit of the very high quality DACs present on even cheap VGA cards which will outperform many DACS found in high end AV equipment. AV equipment can get away with fairly low speed DACs as the PAL or NTSC signals have fairly limited bandwidths. 1600x1200 displays at 100Hz - on even cheap VGA cards -need significantly faster DACs. Note 50Hz refresh rate (for prog scan) will look horrible (lots of flicker) on a normal pc monitor but will be fine on a TV which have a slower phosphor. I use this technique to connect VGA to a hardware colourspace convertor which takes RGB and converts to YUV as my crappy TV only takes a progscan signal in YUV format. Works fine. Hope this helps. Kev [/QUOTE]
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