CDB5513 datasheet(9/22 Pages) CIRRUS

9 / 22 page

CDB5510/11/12/13

DS337DB2

graph to select one corner of the desired Zoom area.

When prompted,clickonthe graphagain to select

the opposite corner of the desired zoom area. Once

an area has been zoomed to, the printing functions

can be used to print a hard copy of that region. Click

on RESTORE when done with the zoom function to

display the entire data set graph. A region can also be

magnified further by clicking on the ZOOM button

again.

RESTORE: Restores the display of the graph after

zoom has been entered. No matter how far in the

user has magnified the data plot, the RESTORE

button will return to the fully zoomed-out data plot.

TIME DOMAIN / FFT / HISTOGRAM Selector:

This pull-down menu selects between time domain,

frequency domain, and histogram mode to perform

and display the appropriate analysis of the data set.

Cal On/Cal Off: This switch allows the user to ap-

ply the calibration values to the data set as it is col-

lected. When the switch is in the Off position, the

collected results will reflect the raw conversion

data from the ADC. When the switch is in the On

position, the calibration values from the Setup

Window will be applied to the data as it is collect-

ed. This switch must be set to the desired value be-

fore data is collected, since the calibration values

can only be applied during the collection process.

CONFIG: Opens a pop-up panel (Figure 4) to con-

figure how much data is to be collected, and how to

process the data once it is collected. The following

are controls and indicators associated with the

CONFIG panel.

SAMPLES: Allows the user to select the number of

conversions to collect, between 16 and 32,768.

WINDOW: Used in the Power Spectrum Window

to calculate the FFT. Windowing algorithms in-

clude the Blackman, Blackman-Harris, Hanning,

5-term Hodie, and 7-term Hodie. The 5-term Hodie

and 7-term Hodie are windowing algorithms devel-

oped at Cirrus Logic. If information concerning

these algorithms is needed, call technical support.

AVERAGE: Sets the number of consecutive FFT’s

to perform and average.

LIMITED NOISE BANDWIDTH: Limits the

amount of noise in the converters bandwidth. De-

fault is 0 Hz.

OK: Accept the changes and close the window

2.3.1 Histogram Plots

The following is a description of the indicators asso-

ciated with Histogram analysis (Figure 6).

BIN: Displays the x-axis value of the cursor on the

Histogram. This represents the output code from the

part.

MAGNITUDE: Displays the y-axis value of the

cursor on the Histogram. This represents the num-

ber of times a certain output code occurred in the

collected data set.

MAXIMUM: Indicator for the maximum value of

the collected data set.

MEAN: Indicator for the mean (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 cur-

rent data set.

2.3.2 Frequency Domain (FFT) Plots

The following describe the indicators associated

with Frequency Domain (FFT) analysis (Figure 3).

FREQUENCY: Displays the x-axis value of the

cursor on the FFT display. This represents the cen-

ter frequency of the currently selected bin in Hz.

MAGNITUDE: Displays the y-axis value of the

cursor on the FFT display. This represents the total

power in dB contained in the selected bin.

CDB5513 Datasheet(PDF) 9 Page - Cirrus Logic

CDB5513 Datasheet(HTML) 9 Page - Cirrus Logic

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

Datasheet Download

Link URL