Can I set the refresh rate on my crt tv using s-video out from pc?

hidehide · 02-24-2007, 07:43 PM

Hi, Im using s-video output to display things in the pc to tv(crt).
Does anyone know can I set the tv refresh rate to 59.94? My tv max refresh rate is 60hz...
Thanks..

WiLLiSTER · 02-24-2007, 11:25 PM

I dont think you can, but I could be wrong. I haven't ever tried to with mine.

Why might you want to change it?

hidehide · 02-25-2007, 02:20 AM

Quote:

Originally Posted by Anti_gilbert

I dont think you can, but I could be wrong. I haven't ever tried to with mine.

Why might you want to change it?

Because there are some timing issues..
I heard people setting their refresh rate on their lcd... maybe not on a crt??

kimcicle · 02-25-2007, 02:27 AM

You can't set your refresh rate on your CRT television to anything other than the NTSC. CRT computer monitors can change their refresh rate because the cathode ray tubes (crt) are able to draw more scan lines in a set amount of time.

LCDs are thought to not have a refresh rate due to the way LCD works. You should do some research.

hidehide · 02-25-2007, 02:49 AM

Tried to search on this topic, cant find any answer..
And someone told me he set his lcd tv refresh rate to 59.94..... i dont really know..
Thanks for your answer..

kimcicle · 02-25-2007, 04:39 AM

He can set his refresh rate to whatever the hell he wants on his LCD. The idea is that a LCD screen will continually shoot the same color to the same spot until it is told to change what color is displayed at that pixel. This is denoted with a response time measurement (usually in ms).

CRTs are always redrawing every line down the screen, despite the fact if it has changed or not. How often each line is drawn is where the idea of refresh rate comes from.

**dieKatze88** · 02-25-2007, 06:35 AM

NTSC With TV out *SHOULD* Usually be set to 60 hz so your transcoder on your videocard can handle the video signal conversion.

seiya256 · 02-25-2007, 01:04 PM

Well, NTSC color has a refresh rate of 59.94Hz. This is because to squeeze color into the already established bandwidth of 30fps B/W NTSC video, they had to drop the frame rate to 29.97fps. Since NTSC is an interlaced signal, this gives us to screen refresh per frame, giving us a refresh rate of 59.94Hz.

LCDs still have a refresh rate. But instead of scan lines going from top to bottom of the screen, the entire screen is refreshed all at once. Most fixed pixel displays are locked at a true refresh rate of 60Hz due to the internal processing. They will usually take higher or lower refresh rates, but that will be converted to 60Hz. This is slowly changing because of the home theater market. We are beginning to see 72Hz and 120Hz displays to accommodate film content without the use of 3:2 pulldown.

hidehide · 02-25-2007, 02:28 PM

Thanks for everyone's reply.. now i know better..
But why some people say ntsc tv is 59.94, while some say 60??

kimcicle · 02-25-2007, 02:35 PM

Quote:

Originally Posted by hidehide

Thanks for everyone's reply.. now i know better..
But why some people say ntsc tv is 59.94, while some say 60??

Because people usually just round it up.

**dieKatze88** · 02-25-2007, 07:17 PM

Quote:

Originally Posted by kimcicle

Because everyone usually just rounds it up to avoid confusion.

Fixed.

*phuzion* · 02-25-2007, 08:56 PM

I think it's safe to close this thread then. If you've got any questions, don't hesitate to PM me and ask.