Use this procedure to isolate problems with external noise on twinaxial
cables.
Electrical noise on twinaxial cables that are not installed correctly
may affect the twinaxial workstation I/O processor card.
Examples of this
include open shields on twinaxial cables, and station protectors that are
not being installed where necessary.
Check for the following on the
system:
- There must be no more than 11 connector breaks in a twinaxial cable run.
- Station protectors must be installed (in pairs) where a cable enters or
leaves a building.
- There can only be two station protectors for each twinaxial run.
- There is a maximum of seven devices (with addresses 0-6) for each cable
run.
- There is a maximum cable length of 1524 meters (5000 feet) for each port.
- All cable runs must be ended (terminated).
- Disconnect all twinaxial cables that are not used.
- Remove any cause of electrical noise in the twinaxial cables.
- All workstations must be grounded.
This ends the procedure.