Time FFT gives you many information about the changes
in signal’s frequency domain, and it is
sometimes very useful to summarize that information. Time FFT statistics enables you to divide
Time FFT result into different frequency segments and to calculate, display and transfer
summarized statistics reports to other programs.
By choosing 3D Tools/Time FFT statistics from menu, a dialog for statistics data display will
appear. On the left side, 5 pairs of edit-boxes (From - To) are available which show 5 possible
frequency segments. You can enter segments boundaries here and press Calculate button.
The calculation report will appear in big edit-box showing you max, min, sum, avg. values for
each segment. By pressing Clipboard button, the complete report will be transferred to clipboard,
so you can transfer it to some word processing program or Microsoft Excel.
If you use Time FFT statistic often, you can create templates for segments that you use, so you
would not have to type them every time. You can do it by creating (or editing existing one) file
called TFFTSTAT.RNG in SIGVIEW's application data directory (usually C:\Documents and
Settings\<UserName>\Application Data\Sigview\). This file has the following structure:
where each row in a file represent a new template, fromX, toX are segment boundaries, NameX
is name of template which will appear in template combo-box. Initially, this file has only one row
which represent an empty template.
You can edit this file with any text editor.
If the file exists, its first row will be used as a default template as soon as you open Time FFT
statistics window. Afterwards, you can switch to other templates by choosing them from Template