Chapter 15: Appendix
(2)Coaxial cable
Coaxial cable consists of a center conductor and an external conductive layer that functions as a shield. Coaxial cables used for Ethernet connections must have 50 ohms of impedance. An RG58A/ U cable can be used with 10BASE2 and a yellow cable can be used with 10BASE5.
The maximum length of a single 10BASE2 cable is 185 m and the maximum length of a 10BASE5 cable is 500 m.
Make sure to connect the shield (external conductive) to the ground to prevent problems from noise (class D single point ground).
Center conductor | Aluminum/polyester | Braid shield |
(tin plated mild copper wire) | tape | (tin plated mild copper wire) |
| Four layer construction |
| |
Insulation | of the outer conductor Jacket | Jacket ring mark | |
(PVC) | (every 2.5 m) | ||
material | |||
|
|
Coaxial cable for Ethernet networks
(3)Coaxial connectors
A coaxial connector is usually an "N" type connector. It is used to connect the coaxial cable to a termination device, another coaxial cable or to a connector type transceiver.
Coaxial connector for Ethernet use
15