What are Cables? How are they used? Categories Cross Reference Tables

	Step 2: How are they used?
	Most A/V systems require cable with at least five conductors, more if audio or other signals need to be routed as well. High-resolution video signals are more sensitive to signal losses and require higher performance cables than do NTSC signals. For longer cable runs, a low loss cable is more appropriate. When purchasing cable, there are three main factors that should be addressed before a decision is made: Versatility- know what the application is for the cable. Is it a temporary or permanent installation? Does the cable need to be flexible and installer-friendly (ease of use means reduced installation time)? Are there specific fire code requirements? Performance- know what types of sources will be distributed through the cables and how far the cable will be run. Both factors greatly influence cable performance. Price- how much a cable costs can have a significant impact on the total price of a system. Yet, the amount of cable that goes into a system is one of the last things addressed in the design stage.