UG-1060
EVAL-ADAQ7980SDZ User Guide
Rev. 0 | Page 20 of 30
Figure 26. Summary Tab
SUMMARY TAB
The following contains information on the contents of the
Summary
tab (see Figure 26).
Waveform Plot
The
Waveform
plot displays the raw
ADAQ7980
results
obtained during the most recent capture burst. See the
Generating a Waveform Analysis Report section for more
information.
Histrogram Plot
The
Histogram
plot contains a histogram of the results
obtained during the most recent capture burst. This shows the
number of occurrences for each code in the results. See the
Generating a Histogram of the ADC Code Distribution section
for more information.
FFT Plot
The
FFT
plot displays frequency analysis of the raw
ADAQ7980
results from the most recent capture burst. See the Generating
an FFT of AC Characteristics section for more information.
Analysis Summary Window
The
Analysis Summary
pane displays important analysis
parameters on the various plots in the
Summary
tab, including
the following:
•
Pk-pk Amp
displays the
difference between the maximum
and minimum values in the data (displayed in
V
and
LSB
).
•
DC Offset/Mean
displays the average value of the data
(displayed in
V
and
LSB
).
•
Transition Noise (PP)
displays the peak-to-peak value of
the noise of the signal (displayed in
μV
and
LSB RMS
).
•
Fund Freq.
displays the frequency with the largest
amplitude in the
FFT
plot (displayed in
kHz
).
•
Fund Amplitude
displays the amplitude of the
Fund Freq.
value (displayed in
dBFS
).
•
RMS Noise
displays the rms voltage of the noise floor in
the
FFT
plot (displayed in
μV
).
•
SNR
displays the ratio of the
Fund Amplitude
value to the
RMS Noise
value (displayed in
dB
).
•
THD
displays the ratio of the energy in second through
fifth harmonic frequencies to that of the
Fund Freq.
value
(displayed in
dB
).
•
S/N+D
displays the ratio of the
Fund Amplitude
value to
the
RMS Noise
value and amplitude of the second through
fifth harmonic frequencies (displayed in
dB
).
•
LSB
displays the equivalent voltage difference between
each code value (displayed in
μV
).
•
SFDR
displays the ratio of the
Fund Amplitude
value to
the largest spurious frequency amplitude (displayed in
dB
).
•
Dynamic Range
displays the ratio of a full-scale signal,
which is the largest signal the
ADAQ7980
can accept with
amplitude equal to the
Reference Voltage (V)
value (in the
Configuration
tab) to the noise floor value (displayed in
dBFS
).
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024
