Soft dB Tenor 24bits Data User Guide - Manual (Page 35)

Tenor Data Logger Soft dB inc.
At any time, the computation parameters can be changed and the recompute button can
be used to update the results.
The next table explains the computation parameters:
Computation parameter Description
The statistics are computed for all global levels of
historic. The time step of the global level historic can
be adjusted between 50ms and 1000ms.
The dB/Lin. parameter allows choosing the amplitude
scale format. The choices are dB, dB(A), lin. rms, lin.
peak or lin. rms
2 .
The Integration parameter allows applying simple or
double integration in the frequency domain for an
acceleration measurement. For the simple integration
option, the power spectrum is divided by jω. For the
double integration option, the spectrum is divided by –
ω
2 .
The Export statistic function allows exporting the statistics in text format.
5.2.4 Waterfall graph
The Waterfall graph module presents the power spectra for the entire time-length of the
framework. The Waterfall graph module computes the power spectra with an adjustable
frequency resolution. Each power spectrum is presented in a three dimensional graph
along a time axis. As well as the numerical amplitude scale, a colour scale is employed to
help in visualizing the high and low levels of the power spectrum amplitudes. The three
dimensional graph can be rotated, zoomed and moved. The next figure presents the
waterfall interface.
User Manual p. 35