Texas Instruments ADS131E08EVM-PDK, Руководство пользователя, Страница: 27 / 39

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ADS131E08 Analysis Tools
27 SBAU200C – June 2012 – Revised April 2020
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Performance Demonstration Kit for the ADS131E08
5.3.4 User-Defined Dynamic Range
This portion of the FFT tool (red box 4, Figure 27 ) is used to examine the SNR of a specific channel within
a given frequency band defined by the Low Frequency and High Frequency fields. The SNR displayed in
this window also appears under the Dynamic Range heading, as shown in Figure 30 .
Figure 30. Changing the User-Defined Dynamic Range for Channel 1
5.3.5 Input Amplitude (V
PP
)
The Input Amplitude field (red box 5, Figure 27 ) is a user input that is important for accurately calculating
the CMRR of each channel.
5.3.6 Waveform Zoom
This zoom function allows a closer examination of the FFT at frequencies of interest, as shown in
Figure 31 .
Figure 31. FFT Plot Using Waveform Zoom Function