| (1) BNC Coaxial Vs. RCA Vs .Cat5 When selecting cables for CCTV connection, either RCA, BNC coaxial cable or Category 5 twisted pair cable can be used. BNC cables generally have lower losses than RCA, are more rugged, and are most commonly constructed using coaxial cable.
For cable lengths under 20 to 25 feet, most RCA cables provide acceptable results for both audio and video but you will rarely if ever see professionals use RCA. At lengths of as little as 30 feet, RCA cable can start to show a measurable loss at the higher frequencies, depending on the quality of the cable. The Category 5 cable also known as Cat5 carries four pairs of wires allowing for more runs on a single cable and being much lighter is easier to work with. While distances beyond 500' becomes a video signal problem for BNC, Cat5 can comfortably extend out to 1,000.
| | | | | BNC Connector | RCA Connector | RJ45 Connector RJ11 Connector | (2)Coaxial Cable
A type of wire that consists of a center wire surrounded by insulation and then a grounded shield of braided wire. The shield minimizes electrical and radio frequency interference.
Coaxial cabling is the primary type of cabling used by the cable television industry and is also widely used for computer networks and CCTV. Although more expensive than standard telephone wire, it is much less susceptible to interference and can carry much more data. (3)Cat-5 Cable
A network cabling that consists of four twisted pairs of copper wire terminated by RJ45 connectors. Cat-5 cabling supports frequencies up to 100 MHz and speeds up to 1000 Mbps. It can be used for 1000Base-T, 100Base-T, and 10Base-T networking. Computers hooked up to LAN s are connected using Cat-5 cables, so if you're on a LAN, most likely the cable running out of the back of your PC is Category 5. (4)RJ45 Connector
Short for Registered Jack-45, an eight-wire connector used commonly to connect computers onto a local-area networks (LAN), especially Ethernets. RJ-45 connectors look similar to a telephone line connector ( RJ-11 connector), but they are somewhat wider. (5)RJ-11 Connector
Short for Registered Jack-11, a four- or six-wire connector used primarily to connect telephone equipment in the United States. RJ-11 connectors are also used to connect dial-up modems to the internet using your telephone line.
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