JDS Uniphase RM3 Series, User Manual

Page: 26 / 47

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1. Using the size of rod specified in the Inspection Report (see the Customized Features and
Test Data section), wind the cable around the rod until the reading displayed on the
Backreflection Meter no longer changes (approximately six turns). The diameter of the rod
must be suitable for the type of fiber connected to the output port jumper and for the
wavelength in use. To minimize any memory of the bends in the cable jacket, do not pull on
the cable while winding, and occasionally wind the cable in the opposite direction (figure 5a).
Figure 9a: Terminating the Jumper for BR Measurement for Single-mode (except 980nm)
2. The second termination is made after the DUT in order to obtain Br
tot
(figure 6a).
Figure 10a: Measuring Backreflection for Single-mode (except 980 nm)
Termination Techniques for Single-mode (980 nm) and Multimode Fiber
Termination is performed using index-matching gel.
1. Apply index-matching gel directly to the fiber end (figure 5b).
2. After measuring BR
0
, clean the connector end in accordance with the Cleaning Connectors
section.
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