CDB5461 Datasheet, PDF (19/27 Pages) Cirrus Logic – Evaluation Board and Software

CDB5461
2.13.1 BIN
Displays the x-axis value of the cursor on the
Histogram.
2.13.2 MAGNITUDE
Displays the y-axis value of the cursor on the
Histogram.
2.13.3 MAXIMUM
Indicator for the maximum value of the collect-
ed data set.
2.13.4 MEAN
Indicator for the mean of the data sample set.
The mean is calculated using the following for-
mula:
Mean =
n-1
Σ ^Xi
i=0
n
2.13.5 MINIMUM
Indicator for the minimum value of the collect-
ed data set.
2.13.6 STD. DEV.
Indicator for the Standard Deviation of the col-
lected data set. The Standard Deviation is cal-
culated using the following formula
StDev =
n-1
Σ ^{(Xi - Mean)2}
i=0
n
2.13.7 VARIANCE
Indicates the Variance for the current data set.
The variance is calculated using the following
formula:
Var =
n-1
Σ ^{(Xi - Mean)2}
i=0
n
2.14 Frequency Domain Information
The following describe the indicators associat-
ed with FFT (Fast Fourier Transform) Analy-
sis. FFT data can be plotted in the Data
Collection Window by setting the Time Domain
/ FFT / Histogram selector to FFT (Figure 7).
2.14.1 FREQUENCY
Displays the x-axis value of the cursor on the
FFT display.
2.14.2 MAGNITUDE
Displays the y-axis value of the cursor on the
FFT display.
2.14.3 S/D
Indicator for the Signal-to-Distortion Ratio, 4
harmonics are used in the calculations (deci-
bels).
2.14.4 S/N+D
Indicator for the Signal-to-Noise + Distortion
Ratio (decibels).
2.14.5 SNR
Indicator for the Signal-to-Noise Ratio, first 4
harmonics are not included (decibels).
2.14.6 S/PN
Indicator for the Signal-to-Peak Noise Ratio
(decibels).
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