EXFO OSA20 User Manual page 71

To analyze a trace:
1. In the analysis mode window, touch the Analysis Setup tab.
2. Touch the analysis tool you want to configure and set-up the parameters as described in
the appropriate analysis tool section. Tool related sections are indicated in the above
table.
3. In the <Analysis Mode> tab, touch the
The analysis menu appears.
4. Define the trace you want to analyze, and set the wanted parameters according to the
instructions given in the following table.
Parameter
Trace
Auto Analysis
Between
Markers Only
Noise Level
@ 1575 nm
OSA20
Number of the spectral trace to analyze (not available in OFA mode).
: the analysis is automatically performed at the end of each

scan and after the change of an analysis parameter (except the
change of the Between Markers Only parameter).
If the Between Markers Only parameter is activated and you have
moved a marker, the analysis is not automatically performed: you
must launch it manually by touching the Analyze button.
: the analysis is performed when the Analyze button is touched.

: the analysis is only performed on the part of the trace located

between markers, highlighted by two grey areas on either side of
the selected area (see Performing Manual Measurements With
Markers on page 58).
: the analysis is performed on the wavelength range of the trace

to analyze.
Detection threshold of the analysis tools.
Sets the level at 1575 nm of the noise detection curve (displayed as a
dotted yellow line on the graph), calculated from the noise spectrum
and dependent on wavelength below which the signal is not analyzed
(this avoids the detection of unwanted peaks in the noisy regions of the
spectrum). To ensure good detection of peaks and troughs, it is
recommended to use a value close to sensitivity (e.g. -70 dBm if
sensitivity is set to -70 dBm).
Analyzing Traces
located at the left of the Analyze button.
Description
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