Cirrus Logic CapturePlus II - Manual (Page 37)

CapturePlus II
DS789UM2 37
Click the Acquire button. Within the Acquire sub-panel, set Select Number of Samples to Capture to
524288. Click on Enable Averaged FFT. In this example, and Channels to Sample have been set to All.
Start the test run by clicking OK. To run this particular test setup takes approximately 1 minute for a
100 kSps ADC.
The following pair of FFT plots show the results of running a typical 2-channel, multiplexed, full-scale input
test. Activate the desired view by selecting Channel 1 or Channel 2. Note that during multiplexing, the
ADC samples per-second rate remains the same but the total number of samples is split between the two
channels. The resulting sample rate for each channel is half that of the ADC, and the Nyquist frequency
for two channels is half that for a single channel.