CDB5464U Datasheet, PDF (24/38 Pages) Cirrus Logic – CDB5464U Engineering Borad and GUI Software

CDB5464U
2.8.12 Frequency Domain Information
The following describe the indicators associated with FFT (Fast Fourier Transform) analysis. FFT data
can be plotted in the Data Collection Window by setting the analysis type selector to FFT (Figure 15).
Figure 15. FFT Analysis
2.8.12.1 FREQUENCY
Displays the x-axis value of the cursor on the FFT display.
2.8.12.2 MAGNITUDE
Displays the y-axis value of the cursor on the FFT display.
2.8.12.3 S/PN
Indicates the signal-to-peak noise ratio (decibels).
2.8.12.4 SINAD
Indicates for the signal-plus-noise-plus-distortion to noise-plus-distortion ratio (decibels).
2.8.12.5 S/D
Indicates for the signal-to-distortion ratio, 4 harmonics are used in the calculations (decibels).
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