Black Box Fiber Meter Manual page 39

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FIBER METER
3. Press the F2 button to reset all setup parameters to
their default values. The default values are defined
in Table 3-1 at the beginning of this chapter.
4. Press the F3 button to reset the IOR (Index of
Refraction) value to its default value of 1.490.
Index of refraction (IOR) is a measure of the speed of light
through a fiber. You must set this appropriately for accurate
multimode fiber length measurements.
36
NOTE

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