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RCA Analog or S-Video Output to 5 BNC Input?

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#1 of 2 EricE



  • 40 posts
  • Join Date: May 31 2002

Posted October 05 2002 - 08:52 AM

Since some projector's also have this type of input, it seems like someone might already know this one. Is connecting a Monitor or projector with 5 BNC input connections to a S-Video or RCA analog video input possible? I've found cables and adapters online that would physically make the connection possible, but I'm not even sure if this would work in the first place. If it is a possibility, what's the best way to go about it?

#2 of 2 Allan Jayne

Allan Jayne


  • 2,406 posts
  • Join Date: Nov 01 1998

Posted October 06 2002 - 01:50 PM

First you have to find out what scan rate(s) the projector accepts.

The easiest situation is if the projector accepts 31.5 KHz RGB 525 scan lines per frame progressive 480p a.k.a. regular VGA 640 x 480 x 60 Hz non-interlaced. A DVDO iScan converts composite or S-video NTSC into RGBHV with this scan rate.

Other line doubling scalers will output other scan rates e.g. XGA 1024 x 768 x 70 Hz. I am not sure which models do what. I do not know where to buy a converter that takes composite or S-video and outputs 480i RGBHV (scan rate approx. 15.75 KHz 525 scan lines per frame) which some broadcast studio monitors only accept.

You cannot connect composite or S-video directly to RGBHV jacks.

Video hints: