Fluke CableAnalyzer DSX-5000, Technical Reference Handbook, Page: 615 / 700

Chapter 19: Custom Media and Test Limits
Make a Custom Fiber Test Limit
579
Wavelength
specific settings
For a fixed loss budget, enter maximum values of
Overall Loss
for a link for each applicable
wavelength.
For a length-based loss budget, enter maximum
values of
Loss/km
for the fiber type for each
applicable wavelength.
Length
Enter a maximum length for the link.
General Settings:
Overall Loss
Enter a maximum value for the loss of all components
and fiber in the link. Enter a minimum loss value if
receiver saturation is possibly a problem in the
installation.
General Settings:
ORL
Optical return loss is the total reflectance for all
components in the link. This includes fiber segments,
connectors, splices, and faults. ORL is the ratio of the
light from the source to the light that the link reflects
back to the source. ORL values are in units of
positive dB. A larger ORL value shows that less light is
reflected back to the source. For example, a link with
an ORL of 45 dB reflects less light back to the source
than a link with an ORL of 30 dB.
Enter a minimum for the total reflectance for the
link.
General Settings:
Segment
Attenuation
Coefficient
Enter maximum and minimum values of attenuation
per kilometer for a fiber segment in the link. Fibers
that are not within these limits may be of poor
quality or the wrong type
Note
In some situations, the tester cannot measure
the segment attenuation coefficient for short
segments (50 m to 500 m, depending on
wavelength and fiber characteristics).
-continued-
Table 23. Custom Test Limit Settings for Loss/Length Tests (continued)
Setting
Description