Exfo AXS-100 Series OTDR Manual do Utilizador descarregar pdf (Página 92)

Measuring Power or Loss

84 AXS-100 Series

Referencing Your Power Meter to a Source

In reference mode, your unit displays the loss

created by the fiber under test only, since it

subtracts a reference value from the measured

power.

In the figure, the reference value (-43.98 dBm) is

subtracted from the actual power measured

(-37.64 dBm).

Note: The reference value you set for each wavelength remains in memory until a

new one is set for the same wavelength, even when you turn the unit off.

To reference the power meter to a source:

1. Press Menu, select Power Meter, and then press Enter.

2. Clean the connectors properly (see Cleaning and Connecting Optical

Fibers on page 22).

3. Using one of the following methods, connect a light source to the

power meter port of your unit.

³ A single reference patchcord

³ Two reference patchcords and a bulkhead adapter

Light

source

Power

meter

Adapter

Reference

patchcord

OUT

Light

source

Power

meter

Adapter

Reference

patchcord

Bulkhead

adapter

Reference

patchcord

OUT

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Exfo AXS-100 Series OTDR Manual do Utilizador Página 92