Fluke OF-500-01 OptiFiber, Technical Reference Handbook, Page: 162 / 278

OF-500 OptiFiber Certifying OTDR
Technical Reference Handbook
7-10
About 1 Jumper Connections
The reference and test connections shown in this manual
produce 1 jumper results. 1 jumper results include the loss
of the fiber plus the loss of the connections at both ends of
the link. To ensure accurate results, the connection to the
fiber module's output port must not be disconnected after
the reference is set. Using connector adapters that match
the connectors in the fiber under test lets you connect to
the fiber without disturbing the output port connection.
W
Caution
If you disconnect the reference test cords from the
tester’s or smart remote’s output port after
setting the reference, you must set the reference
again to ensure valid measurements.
If you do not have the correct connector adapters, see
"Modified 1 Jumper Method" in Appendix B for alternative
connections that produce 1 jumper results.
To test links with different connectors at each end, visit the
Fluke Networks Knowledge Base for suggestions.
About Setting the Reference
The reference serves as the baseline power level for loss
measurements. Regular referencing helps account for
minor variations in source power and connection integrity.
Also, since the reference is the baseline for measurements,
the losses of the reference test cords and adapters used
during referencing are excluded from test results.
Note
Turn on the tester and smart remote and let them
sit for 5 minutes before setting the reference.
Allow additional time if the modules have been
stored above or below room temperature.
For the most accurate test results, you should set the
reference at these times:
•
At the beginning of each day using the remote end
setup (Figures 7-6 through 7-13) you will use that day.
The tester reminds you to set the reference if the
reference is more than 12 hours old.
•
Anytime you reconnect a reference test cord to the
tester or other source.
•
Anytime the tester warns you that the reference is out
of date.