Modified 1 Jumper Method - Fluke OF-500-01 OptiFiber Technical Reference Handbook

OF-500 OptiFiber Certifying OTDR
Technical Reference Handbook

Modified 1 Jumper Method

This section shows modified reference and test connections
that produce 1 Jumper results. Use these connections if you
need 1 Jumper results but cannot change the tester's or
source's input adapter to match the connectors on the fiber
under test. This method lets you connect to the fiber
without disturbing the tester and source output
connections after setting the reference.
Figures B-4 and B-5 show reference and test connections for
a fiber with MT-RJ connectors.
The reference connections (Figure B-4) cancel out the
effects of one connection and two reference patch cords in
each fiber path.
The test connections (Figure B-5) add two connections and
the fiber in the cabling under test to each path. Note that
you use two short patch cords to connect the main unit's
reference patch cords to the link. The extra cords ensure
that the measured loss accounts for two connections in the
cabling under test, since one connection was canceled out
during referencing.
B-8
Loss results for the modified 1 Jumper method therefore
represent both connections plus the fiber in the cabling
under test.
On the tester select 1 Jumper as the Test Method when
using modified 1 Jumper connections.
To enter the length of the third, short reference test cord
used in the modified 1 Jumper connections, press
Setup from the Loss/Length HOME screen.
B
Test