National Semiconductor ADC122S655, Руководство пользователя

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To view an FFT of the data captured, click on the
‘FFT’ tab. This plot may be zoomed in on the data
plot. A display of dynamic performance
parameters in the form of SINAD, SNR, THD,
SFDR and ENOB will be displayed at the top right
hand corner of the FFT plot (
Figure 9 ). Typical
values using a V
REF
= 2.5V and a V
in
= 4.9 V
pp
are:
•
SINAD : 71.594
•
SNR : 71.939
• THD : -82.767
•
SFDR : 83.164
•
ENOB : 11.6
Acquired data may be saved to a file. Plots may
also be exported as graphics. See the Data
Capture Board User's Guide for details.
Figure 8: Software Histogram
Figure 9: FFT