Calibration - Black Box Fiber Meter Manual

The Calibration (CAL) function allows you to set the
Fiber Meter to the cable's index of refraction (IOR) and
set the Autotest power reference. Refer to Chapter 5 for
instructions on setting the Autotest power reference.
I R
NDEX OF EFRACTION
Index of refraction (IOR) is a measure of the speed of
light through a fiber. Setting the appropriate IOR value
is important to making accurate multimode fiber length
measurements.
You can set the IOR as follows:
• Use the system-default IOR setting of 1.490.
• Manually input an IOR value, if known. IOR values
are those specified at 1300 nm.
We recommend that you set the IOR each time you test
a cable from a different manufacturer or spool.
Setting the IOR is only necessary when performing Autotest
multimode fiber certification tests that include length
measurements.

4. Calibration

(IOR)
NOTE
CHAPTER 4: Calibration
37