Exfo OTDR 2 Manual do Utilizador descarregar pdf (Página 34)

Preparing Your OTDR for a Test

26 OTDR

Setting the IOR, RBS Coefficient, and Helix Factor

4. From the Wavelength list, select the desired wavelength.

Note: The helix factor value takes into account the difference between the length

of the cable and the length of the fiber inside the cable; it does not vary with

wavelengths. For this reason, you cannot define a different helix factor for

each wavelength.

IMPORTANT

Change the default RBS coefficient only if you have values provided

by the fiber manufacturer. If you set this parameter incorrectly, your

reflectance measurements will be inaccurate.

Wavelength for which

RBS and IOR will be

defined

The Revert to Factory Settings

button resets all the values in

the Link Definition tab

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Exfo OTDR 2 Manual do Utilizador Página 34