Exfo FTB-5600 Distributed PMD Analyzer Instrukcja Użytkownika Pobierz pdf (Strona 87)

Managing Results

Distributed PMD Analyzer 81

Using Markers to Measure PMD Differences (Delta PMD Tab)

Using Markers to Measure PMD Differences

(Delta PMD Tab)

The Delta PMD tab is used to measure sections along the cumulative PMD

curve. The measurement is performed with two cursors; cursor A indicates

the beginning of the measurement and cursor B indicates the end. On

screen, you will see the positions of the markers, as well as the PMD

cumulative values. The application then computes and displays the square

rooted difference between cumulative PMD at the position of the two

markers.

The equation below illustrates how the difference is calculated.

ΔPMD

CumulPMDCursorB

CumulPMDCursorA

–

CumulPMDCursorB

CumulPMDCursorA

–

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Exfo FTB-5600 Distributed PMD Analyzer Instrukcja Użytkownika Strona 87