User's Guide

31
Understanding Expert/Real-time OTDR Settings
Parameter Description
Trace Length The Trace Length parameter determines the distance range of the full (unzoomed) trace. It
also determines the distance between data points in the trace: the longer Trace Length, the
wider the data point spacing. We recommend selecting the shortest Trace Length that is
longer than the ber under test. For example, to test a ber that is 2.5km long,
select the 5 km range.
Available Range values: 250 m, 500 m, 1, 2, 5, 10, 15, 20, 40, 80, 160, 240 km.
Pulse Width The FlexScan can operate using different pulse widths. Short pulse widths provide the
shortest event and attenuation dead zones. Long pulse widths provide the range needed to
test long bers. Available Pulse values: 3, 5, 10, 30, 100, 300 ns, 1, 3, 10 µs.
Note: Longer pulse widths only available on longer Trace Lengths.
Averaging Time The Averaging Time parameter determines the duration of a timed test and the number of
trace averages performed. Longer averaging time produces a smoother trace.
Available Averaging Time values: 5, 10, 30, 60, 90, 180 sec.
Fiber Type Available: User or G.65x. Press and hold the currently selected User or SMF-28E option to
view Group Index of Refraction, Backscatter Coefcient, and Attenuation coefcient.
User values can be edited.
Wavelength
Settings
FS200-50B: 1550 nm only
FS200-60: 1650 nm only
FS200-100: 1310, 1550, 1310/1550 nm
FS200-300: 1310, 1550, 1310/1550 nm
FS200-304: 1310, 1550, 1650, 1310/1550, 1310/1650, 1550/1650, 1310/1550/1650 nm