The Data Capture icon selects the available charting options for displaying conversion data. The data options, as shown in Figure 4-5, include the Time Domain, Histogram, and FFT displays. However, the FFT plot and information may have little meaning because the ADS1x48 is primarily a dc measurement device.

Figure 4-5 Data Capture Window

A slide-out menu (as shown in Figure 4-6) is viewable on the right side of the Chart window. By clicking the Show Capture Settings slide-out, various configurations and displays are selectable. The drop-down menus available in the Capture Settings slide-out are:

• Select data rate for the data output conversion rate
• Select MUXP channels and Select MUXN channels for choosing the desired input channels to be measured
• Select PGA for choosing the required input signal amplification
• SELFOCAL button for performing a device (ADC) offset calibration

Figure 4-6 Capture Settings Slide-Out

To collect data, select the number of Samples to collect in the upper right corner of the capture window. To capture data, press the Collect Data button next to the Samples setting (shown in Figure 4-5).

Conversion data collects when the Collect Data button is pressed, after which the button changes to read Stop Collect. Pressing the Stop Collect button stops the collection of conversion data; otherwise the data are collected for the chosen number of Samples. The number of Samples can be changed prior to pressing Collect Data by directly entering the desired number of samples or by clicking on the up and down arrows. The number of samples cannot be changed while data are being collected.

When the Collect Data operation is complete, the data displays the calculated channel statistics and a plot of the data in the chart window. Various icons for viewing the data include zoom, pan, and home. The home icon restores the graph to show all data collected. The viewing icons are underneath the statistics information on the right side of the GUI.