Reviewing Waterfall Spectra Data
dataPAC User’s Guide
91
The table shows the order, frequency, the RSS band amplitude, bins, and peak amplitude as
defined below.
z
Order - The order (frequency/speed) of the highest amplitude spectral line contained in
the peak.
z
Frequency - The frequency of the highest amplitude spectral bin contained in the peak.
z
Band Ovrl. Ampl. - The RSS (root-sum-square) amplitude calculated from all the
spectral lines contained in the peak.
z
Bins - The number of bins contained in the peak.
z
Peak Ampl. - The amplitude of the highest amplitude spectral line contained in the
peak, represented as a bar showing amplitude relative to other peaks.
When the peak list is created, it highlights the peak nearest the frequency cursor. You can
use the up and down arrow keys to select different peaks.
When there is insufficient room to display all the peaks, the peak list is created with a
vertical scroll bar, and the list scrolls when you move the selection beyond the upper and
lower extremes of the displayed list.
Pressing <SELECT> while displaying the peak list adjusts the frequency scale to show only
bins near the highlighted peak. Then you can press <F2> (Full Spectrum) to return to a
display of the entire spectrum. Pressing <SHIFT><SELECT> cancels the peak list without
affecting the frequency scale.
Reviewing Waterfall Spectra Data
When you collect more than one spectrum for a point, the dataPAC displays the spectrum in
a waterfall mode, one after the other. This section describes the ways to review waterfall
spectra data.
Waterfall spectral data appears as shown in the following diagram.
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