Fluke Versiv Series Technical Reference Handbook page 476

Versiv Series Cabling Certification Product Family
Technical Reference Handbook
Measurements of overall loss for each wavelength the tester

used. The measurement is red if it exceeds the limit.
 MAX LIMIT: The maximum loss allowed by the selected test
limit for each wavelength the tester used.
MARGIN: The difference between the limit and the measured

loss for each wavelength the tester used. Margin is negative if
the loss exceeds the limit.
Tap

If the results include warnings, tap
If a warning caused the test to fail, tap
Some conditions make the OTDR test fail even when all
measurements are within the limits.
OPTICAL RETURN LOSS: This tab shows the ORL for the link.

Optical return loss is the ratio of the light from the source to
the light that the link reflects back to the source. The
reflected light is the total light reflected by the fiber and
components in the link. This includes the launch/tail cord
events, fiber segments, connectors, splices, and faults. If
launch compensation is on, this includes only the fiber
between the launch and tail connections, including the
launch and tail events. If launch compensation is off, it
includes the fiber from the OTDR port connection, including
the OTDR port connection, to the end of the fiber. The last
connector is not included, unless it has a reflectance that is
below the reflectance of the fiber, as can occur with APC
connectors.
ORL values are in units of positive decibels. 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.
440
to see help for this screen.
to see the warnings.
to see the warning.