klem kedidelhopper wrote:

I just thought of something else. If CAT3 is spec'd out to 16MHZ and a
typical NTSC TV channel was 6MHZ wide with 250KHZ guard bands on
either end why would CAT3 cause any problems in a video application?
It seems to exceed the requirements for TV video. Lenny


It's not flat to 16 MHz. NTSC channels start at 54 MHz so the video
has to be baseband. Even with BalUns the response isn't flat for
baseband video. Switching to a different cable with different twist
rates can cause problems, as well. This is from a retired TV broadcast
engineer.