Cirrus Logic CDB5532U - Manual (Page 13)

CDB5532U
DS807DB1 13
2.7 Histogram Information
The following is a description of the indicators associated with histogram analysis. Histograms can be plotted
in the Data Collection window by setting the Time Domain / FFT / Histogram selector to Histogram.
BIN: Displays the x-axis value of the cursor on the histogram.
MAGNITUDE: Displays the y-axis value of the cursor on the histogram.
MAXIMUM: Indicator for the maximum value of the collected data set.
MEAN: Indicator for the average of the data sample set.
MINIMUM: Indicator for the minimum value of the collected data set.
STD. DEV.: Indicator for the standard deviation of the collected data set.
VARIANCE: Indicates the variance for the current data set.
2.8 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 Time Domain / FFT / Histogram selector to FFT.
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/D: Indicator for the signal-to-distortion ratio, 4 harmonics are used in the calculations (decibels).
S/N+D: Indicator for the signal-to-noise + distortion ratio (decibels).
SNR: Indicator for the signal-to-noise ratio, first 4 harmonics are not included (decibels).
S/PN: Indicator for the signal-to-peak noise ratio (decibels).
# of AVG: Displays the number of FFTs averaged in the current display.
2.9 Time Domain Information
The following controls and indicators are associated with Time Domain analysis. Time domain data can
be plotted in the Data Collection window by setting the Time Domain / FFT / Histogram selector to Time Do-
main.
COUNT: Displays current x-position of the cursor on the time domain display.
MAGNITUDE: Displays current y-position of the cursor on the time domain display.
MAXIMUM: Indicator for the maximum value of the collected data set.
MINIMUM: Indicator for the minimum value of the collected data set.