12 frequency domain information, 1 frequency, 2 magnitude – Cirrus Logic CDB5463U User Manual
Page 24: 3 s/pn, 4 sinad, 5 s/d, 6 snr, Figure 15. fft, Cdb5463u
CDB5463U
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DS805DB2
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).
2.8.12.6 SNR
Indicates for the signal-to-noise ratio, first 4 harmonics are not included (decibels).