On Tue, 3 Sep 2002, Lee Sanders wrote: > 100hz Progressive Scan TV Anyone tried connecting their VGA output to > a 100hz TV (SCART, RGB and composite sync) ? I have found a circuit > which apparently works for projectors by passing RGB straight and > making the composite sync out of HSync and VSync - oh, and you have to > reprogramme your video card to produce TV-like signals. I reckon my TV > might be able to handle 640x480 if I ask it nicely. Any comments ? For > want of more information I'm tempted to put an oscilloscope on the > outputs from my DVD player (which sends over RGB) to check the signal > levels) I have successfully driven a TV using a VGA->SCART adaption like you describe. I forget where I got the cct but I built it right into the SCART connector. Your 100Hz TV will be looking for standard 50HZ input - it doubles the scanrate internally. For this to work you need a video card that can do interlacing. If your card can't, you will be limited to half the vertical resolution. Regards, Steve Davies
