Cirrus Logic CDB5480U - Manual (Page 33)

CDB5480U
DS893DB5 33
• MINIMUM: indicates the minimum value of the collected data set.
Figure 27. Histogram Analysis
2.8.1.12 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. See Figure 28.
The FFT information includes:
• FREQUENCY: displays the x-axis value of the cursor on the FFT display.
• MAGNITUDE: displays the y-axis value of the cursor on the FFT display.
• S/PN: indicates the signal-to-peak noise ratio (decibels).
• SINAD: indicates the signal-plus-noise-plus-distortion to noise-plus-distortion ratio (decibels).
• S/D: indicates the signal-to-distortion ratio, 4 harmonics are used in the calculations (decibels).
• SNR: indicates the signal-to-noise ratio, first 4 harmonics are not included (decibels).