DTX-MFM/SFM Fiber Modules
Users Manual
Table 2. Fiber Test Settings (cont.)
Setting Description
SETUP > Fiber >
Index of Ref. Source (n)
> User Defined or
Default
The tester uses the index of refraction (n) defined in the currently selected fiber type (Default) or
a value you define (User Defined). The default value defined by the selected fiber type
represents the typical value for that fiber type. You may enter a different value if necessary. To
determine the actual value, change the index of refraction until the measured length matches
the known length of a fiber.
Increasing the index of refraction decreases measured length.
SPECIAL FUNCTIONS >
Set Reference
Patch Lengths
(softkey on the View
Connections screen)
Setting a reference sets the baseline power level for loss measurements. See “About Setting the
Reference” o n page 9.
After you set the reference, you can enter the lengths of the patch cords used. The lengths are
saved with results to meet TSB-140 reporting requirements for fiber test results.
Settings for saving tests See the DTX Series CableAnalyzer Users Manual or Technical Reference Handbook for details on
preparing to save tests.
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