Fluke Networks CertiFiber Pro Users Manual - Manual (Page 376)

Versiv Cabling Certification Product Family
Technical Reference Handbook
354
Table 18. Custom Test Limit Settings for OTDR Tests
Setting Description*
Length Enter a maximum length for the link.
Connector Loss Enter a maximum value for connector loss.
Splice Loss Enter a maximum value for the loss of one splice.
Reflectance Reflectance is the return loss for one event. It is the
ratio of the light reflected at one point on the fiber
to the light that gets to that point from the source.
Reflectance values are in units of negative dB. A
smaller (more negative) reflectance value shows that
less light is reflected back to the source. For example,
a reflectance of -45 dB shows for a good multimode
connection. A reflectance of -20 dB shows for a bad
multimode connection that reflects more light back
to the OTDR.
Enter a maximum reflectance value for one event.
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.
Overall 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.