On Fri, 17 Dec 2004 12:58, Nick Rout wrote: > this http://www.epanorama.net/documents/video/videocoax.html page > states: > > "In video equipment wiring the 75 ohm coaxial cable is the standard to > carry video signals. Cable selection is important to achieving high > quality design. Installers need to know when to use 75-ohm baseband or > broadband coaxial cable, RG-59, RG-6 or RG-11 cable. The standard medium > installed in video applications is 75-ohm baseband and broadband coaxial > cable. Most manufacturers publish specification sheets listing cable > property characteristics. In terms of attenuation, for example, RG-59 > baseband cable can be run to 600 feet (200 meters), and RG-6 and RG-11 > baseband cable are effective to 850 feet (270 meters) and 1200 feet (400 > meters), respectively. For some applications where a small cable is > needed to carry video signal RG-179/U is used quite commonly (there are > also many small non-standard ccoaxial cables used mostly as part of > larger cables with multiple coaxial conductors). Those smaller cables > have much higher attenuation than the larger cables, so they are usable > only for shorter distances."
It also states: "You can get lower losses with a thinner (often stranded) conductor, and thus have a more flexible and easier-to-route cable. Hence composite-video cables are probably better suited for carrying basedban videon than RG-6 broadband coax would be. " Additionally, paragraph two of that web page implies the RG-6 they are referring to has an all-copper core, not a steel core. Wayne
