Soft-db Tenor 24bits Data User Guide Manual do Utilizador descarregar pdf (Página 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

User Manual p. 36

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Soft-db Tenor 24bits Data User Guide Manual do Utilizador Página 36