Cirrus Logic CS5550 - Manual (Page 12)

CDB5550
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2.2.5.2. Config Button
This button will bring up the configuration window, in which the user can modify the data collection spec-
ifications. Refer to Figure 8.
Figure 8. CDB5550 Configuration Window
Number of Samples
This box allows the user to select the number of samples to collect, between 16 and 4096.
Average
When doing FFT processing, this box will determine the number of FFTs to average. FFTs will be collect-
ed and averaged when the Collect button is pressed.
FFT Window
This box allows the user to select the type of windowing algorithm for FFT processing. Windowing algo-
rithms include the Blackman, Blackman-Harris, Hanning, 5-term Hodie, and 7-term Hodie. The 5-term
Hodie and 7-term Hodie are windowing algorithms developed at Cirrus Logic.
Histogram Bin Width
This box allows for a variable “bin width” when plotting histograms of the collected data. Each vertical bar
in the histogram plot will contain the number of output codes contained in this box. Increasing this number
may allow the user to view histograms with larger input ranges.
Input Channel Select
There are four check boxes on the right side of the Configuration window which allow the user to select
what data is displayed. The user has the option to select between channel 1 and channel 2, using either
the filtered or unfiltered conversion results.
2.2.5.3. Collect Button
This button will collect data from the part, to be analyzed in the plot area.
2.2.5.4. Output Button
This button will bring up a window in which the user can output the raw data to a file for later use, save
the FFT data, save the histogram data, print out a plot, or print out the entire screen.