Fluke OF-500 OptiFiber, Техническое справочное руководство

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Using the Loss/Length Option
About Method B Connections
6
6-13
About Method B Connections
The reference and test connections shown in this manual
produce Method B results. Method B 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 Method B" and "The Alternate Method" in
Appendix B for alternative connections that produce
Method B results.
To test links with different connectors at each end, see
"The Alternate Method" in Appendix B or 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 6-7 through 6-13) you will use that
day. The tester reminds you to set the reference if
the reference is more than 12 hours old.
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