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Pulse width
Narrow pulse widths provide better resolution. That is, they may be used to detect events which are
close together. However, narrower pulse widths inject less optical energy into the fiber-under-test,
resulting in a noisier trace (lower dynamic range). If a narrow pulse width is used on a long fiber, the
trace may reach the noise floor before the end of the fiber is reached.
Averaging
Longer averaging times improve dynamic range and can be used to compensate for some of the range
lost when selecting a narrow pulse width. However, tests take longer to complete.
Resolution
“Normal” resolution averages a higher number of traces than “High” resolution does in a given time
frame by using a more coarse data-spacing. Events in the event table may be more precisely located
using High resolution.
