General Information ................................................... 2
Introduction ............................................................ 2
Technical Specifications ......................................... 2
Installation Instructions .............................................. 4
Installation Procedure ............................................. 4
System Connections ............................................... 5
Alarm Switch Settings ............................................ 6
Indicator LEDs ....................................................... 6
Operating Pointers and Troubleshooting .................... 8
Maintenance and Repairs ........................................... 8
Limited Warranty ........................................................ 9
CONTENTS
1
©
2006, Communications Specialties, Inc.. Pure Digital Fiberlink is a registered trademark of
Communications Specialties, Inc.
8
OPERATING POINTERS AND TROUBLESHOOTING
MAINTENANCE AND REPAIRS
The Pure Digital Fiberlink
®
7250 Series transmission system has been
manufactured using the latest semiconductor devices and techniques
that electronic technology has to offer. It has been designed for long,
reliable and trouble-free service and are not normally field repairable.
Should difficulty be encountered, Communications Specialties main-
tains a complete service facility to render accurate, timely and reliable
service of all products.
Optical Fiber:
The 7250 Series operates with most multimode (MM) and single mode
(SM) optical fibers. However, be aware that the type of fiber you use
will affect the system’s loss budget and the maximum transmission dis-
tance that it can support.
Troubleshooting:
Multimode fiber optic cable contains an optical fiber with a light car-
rying “core” that is only .0025 inches (62.5 microns) in diameter. Single
mode fiber optic cable has an even smaller “core,” only .00032 to .0004
inches (8-10 microns). This is smaller than a human hair!
Therefore, any minute particles of dirt or dust can easily block the fiber
from accepting or radiating light. To prevent this from happening, always
use the provided dust caps whenever optical connectors are exposed to air.
It is also a good idea to gently clean the tip of an optical connector with a
lint-free cloth moistened with alcohol whenever dust is suspected.
The status of the VIDEO and AUDIO indicator LEDs should provide
the first clue as to the origin of an operational failure. If these are off, it
usually means that the fiber is broken or has too much attenuation. Next,
be certain that the input and output signal connections are correct.
If, after reviewing the above possibilities, the system is still not operat-
ing, please contact the Customer Service Department for further assistance.
