Soft-db Opus Suite Data Logger Module Instrukcja Użytkownika Pobierz pdf (Strona 38)

9.1.5 FRF (Hx)

The FRF (Hx) module allows computing the average frequency response between channels. The

following figure presents the FRF module interface:

At any time, the computation parameters can be changed and the Recompute FRF button can be

used to update the results.

The FRF interface has two graphs: 1) The FRF graph to present the amplitude (or the phase) versus

the frequency, and 2) the coherence graph. Three types of FRF can be computed:

H1 using this equation: H1=y/x=Sxy/Sxx

H2 using this equation: H2=y/x=Syy/Sxy

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Soft-db Opus Suite Data Logger Module Instrukcja Użytkownika Strona 38