Cirrus-logic CapturePlus II Manual do Utilizador descarregar pdf (Página 26)

CapturePlus II

26 DS789UM2

A typical FFT plot resulting from running a baseline test is shown below. Key information calculated from

the captured data and displayed is the SFDR, SINAD, S/D, and SNR.

A.1.2 Baseline Noise & Distortion Test - Averaged FFT

Connect the evaluation board’s analog input(s) to circuit ground.

Select the Frequency Domain window (selected by clicking on the Frequency Domain tab at the top of the

screen). Activate the Grounded Input FFT and Log Freq Scale buttons. Select the Window Type to be

Crystal 7-Term.

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Cirrus-logic CapturePlus II Manual do Utilizador Página 26