GRASS VALLEY XIP-3901, Руководство пользователя

Страница: 288 / 308

288
Maintenance & Troubleshooting
Keep Fiber Connections Clean
When contacting Grass Valley Technical Support, they may ask for product information.
This is found in the Info panel. See Info Panel , on page 232 or Info Panel , on page 273.
Keep Fiber Connections Clean
Safety First:
• Never assume a fiber is dark. Never look directly into the end of a fiber cable. All people
in the area must wear laser safety glasses with side shields.
• Installing connectors on a fiber requires special handling procedures. Read and follow
the fiber and connector manufacturer’s instructions.
The physical interface between the optical fiber and the fiber port of the SFP cartridge is
the critical point in the system. The fiber and the optical port must be accurately aligned –
that’s the job of the connector plugs and sockets – and be in intimate contact with no
obstructions. This is your job. The small size of the fiber, and the even smaller size of the
fiber core, means that even common dust particles can seriously impair the transfer of light
from one fiber to another.
There are a variety of cleaning solutions available to help you maintain good fiber network
performance. For best results, it should be possible for you to perform a visual inspection of
the fiber ends to verify cleanliness.
Grass Valley strongly urges you to select a cleaning method that meets your needs, and to
use it rigorously and consistently.
A few tips:
• When an optical fiber is disconnected from the SFP module’s optical port, always:
Problem Possible solutions…
SFP n Status LED is blue
flashing even with a fiber
present
Make sure you are using the right multimode fiber type. By
convention, the cable should be orange.
Make sure the fiber connector is properly seated in the SFP
cartridge.
Make sure the media network switch is a powered-up.
Make sure the total loss in the optical path is not greater than 2.5
dB, due to any combination of factors mentioned here. Measure
the loss if necessary.
Check the fiber for any damage. The fiber cannot have small
circumference loops.
Check the fiber connectors for dirt and debris. See
Keep Fiber
Connections Clean , on page 288.
Make sure your fiber length is within the range of the media
network switch and of the SFP cartridge’s specification.
Note: depending on fiber type, and if splices are done on your
fiber, the actual maximum usable length will be reduced.
Densité status LED is off Make sure the card in fully inserted into the frame and that the
frame is powered.
Interpretation of status
LEDs
Status LEDs show the card’s current operating status. See Front
Card-edge Interface , on page 35 for more information.