Checking the Coaxial Cable
| 1. | If the system is operating, perform an orderly shutdown and then disconnect ac power from the workstations. |
| 2. | Disconnect the coaxial cable from one of the "end" workstations (where a 50 ohm terminator is present). |
| 3. | At the disconnected cable end, use an ohmmeter to measure the resistance from the BNC connector center conductor to the connector body (housing). The meter reading should be 50 - 110 ohms, depending on the length of the network cable (longer cables will have a higher resistance reading). |
| 4. | If the reading is less than 50 ohms, check the cable, the terminator, and the connectors for shorts. |
| 5. | If the resistance is greater than 110 ohms, check for one or more of the following conditions: |
| • | The terminator is missing from the end of the link; or it is open. |
| • | The cable shield or center conductor is open. |
| • | A poor solder joint on a BNC connector center conductor. |
| • | A damaged "T" connector at one of the workstations. |