EXFO FTB-5600 Distributed PMD Analyzer - Manual (Page 50)

Setting up and Operating your Distributed PMD Analyzer
44 FTB-5600
Performing an Acquisition
2. Set the wavelength span for your test. The default range is 1520 nm to
1580 nm. EXFO does not recommend changing this range unless you
want to perform a very specific test.
3. Set the distance range, in kilometers, from the list of available values,
or you can enter your own manually. Reducing the range to the part of
the link that you want to measure will increase measurement speed
and decrease the resulting file size. If you do not know the length of the
link, you can rely on the OTDR trace to estimate it.