Analog Devices EVAL-ADE9113 User Manual page 14

User Guide
EVALUATION BOARD SOFTWARE
Waveform Scope
The waveform scope provides a visualization of the ADC outputs
against time, as well as a frequency domain analysis of the cap-
tured samples (see Figure 17).
1. Capturing Data: The SDP-B
collects their outputs, and then sends the collected data to the
EVAL-ADE9113KTZ software for plotting and analysis.
a. Configure the datapath using the Datapath Settings drop-
down menu. Note that the EVAL-ADE9113KTZ does not
support a 32 kHz sampling rate with direct SPI.
b. On the bottom right corner of the window, select the number
of samples to collect on each phase.
c. Click Read to capture samples once, which writes the data-
path configuration to the ADCs, and then starts collecting
samples.
d. Enable the Reread button and then click Read to capture
and display batches of samples in succession. Disable
Reread to stop.
2. Spectral Analysis: The EVAL-ADE9113KTZ software then per-
forms spectral analysis on the samples shown in the Time-Do-
main Plot to get the Frequency-Domain Plot and the Metrics
Table.
a. Set the Zero dB Reference (codes peak) point. By default,
it is set to the full-scale ADC output, 6710886, meaning
that the full-scale ADC inputs that produce full-scale ADC
outputs map to 0 dB.
b. Select one of the ten provided FFT window types using the
Window dropdown menu.
c. Set the Analysis BW Minimum (Hz), Analysis BW Maxi-
mum (Hz), Fundamental Frequency (Hz), Sideband Bins,
and Analysis Harmonics as desired. These parameters
are used to calculate the values in the Metrics Table. For
tips, hover the mouse pointer over the options.
analog.com
Figure 17. Waveforms Scope with 50 V, 1 A at 50 Hz on Phase A, Phase B, and Phase C
configures the ADE9113 devices,
The Metrics Table displays the parameters described in
Table 5. To calculate these parameters, the following are
extracted from the FFT in this given order:
Signal: the FFT bin containing the entered Fundamental
►
Frequency (Hz).
DC: the bin containing 0 Hz.
►
Spur: the bin containing the highest remaining tone.
►
Harmonics: the bins containing multiples of the funda-
►
mental.
Noise: everything that is left.
►
Table 5. Parameters Calculated from Spectral Analysis
Parameter Description
SNR (dB) Signal-to-noise ratio
THD (dB) Total harmonic distortion
SINAD (dB) Signal-to-noise-and-distortion ratio
SFDR (dB) Spurious-free dynamic range
Signal Maximum codes obtained from the fundamental
frequency
Noise Maximum codes obtained from noise frequencies
Harmonics Maximum codes obtained from harmonic frequen-
cies
DC Maximum codes obtained from DC (0 Hz)
Max Spur Maximum codes obtained from the spur frequency
3. Save to File: The captured and calculated data can be saved
to .csv files for the user to process as follows (see
description of the files):
a. On the bottom right corner of the window, click Save to
Disk.
b. Pick the destination directory using the pop-up menu. Note
that only the phases enabled during the Read get saved.
EVAL-ADE9113
Table 6
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for a