EXFO FTB-5600 Distributed PMD Analyzer - Manual (Page 40)

Setting up and Operating your Distributed PMD Analyzer
34 FTB-5600
Performing an Acquisition
The FTB-5600 does a series of actions in taking a measurement.
³
The instrument takes an OTDR trace and displays it. This step only
takes a few seconds. At this point, you should inspect the trace to see if
there are any problems.
³
Then, the instrument measures the SOPs. This will take more or less
time depending on the accuracy and sensitivity requested. The
remaining time and SOPs to measure are indicated in the status bar of
the application. After measuring about 10 SOPs, you will see a
temporary cumulative PMD curve.
³
At this point, considering that the overall measurement process is quite
long, EXFO strongly recommends that you make a general inspection
of the OTDR trace to verify that the instrument is properly connected
and that the FUT is OK.
³
Once all of the SOPs are acquired, the instrument computes the actual
PMD curve.