Soft dB Tenor 24bits Data User Guide - Manual (Page 36)

Tenor Data Logger Soft dB inc.
Figure 25: Waterfall interface
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
This is the number of lines of the average power
spectra. Possible selections are 1024, 2048, 4096 or
8192 lines. The FFT calculation is done with a block
size of 2*Nbr Lines. For a waterfall graph, a large
number of lines mean a poor time resolution.
Conversely, greater time resolution results in lower
frequency resolution. Note that the overlap parameter
can be used to limit this problematic.
This is the time window used for the power spectrum
computation.
This parameter allows adjusting the overlap between
the time blocks used for the power spectrum
calculation. This parameter can be adjusted from 0%
to 90%. This parameter can be used to increase the
time resolution of the waterfall graph.
The dB/Lin. parameter allows choosing the amplitude
scale format. The choices are dB, dB(A), lin. rms, lin.
peak or lin. rms
2 .
User Manual p. 36