Promax AE-166 User Manual page 90

Topographic
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The topographic view shows the frequency of events. The topographic view is
useful for observing smaller signals that have been overpowered by stronger
signals or to easily observe intermittent events. Color is used to represent the
frequency of an event. Red represents a high frequency of occurrence, while
blue represents events that occur rarely.
Spectrogram + Spectrum
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Figure 64. Displays both spectrographic and spectrum views of the signal.
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Figure 63.
February 2017