Waveform Tab - Analog Devices AD7172-4 User Manual

EVAL-AD7172-4SDZ User Guide
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WAVEFORM TAB

See Figure 8 for the Waveform (8) tab.
Analysis Channel
The Noise Analysis (18) section and waveform graph shows the
analysis of the channel selected via the Analysis Ch (9) drop-down
combo box (see Figure 8).
Samples
The Samples (10) numeric control and batch control (11) set
the number of samples gathered per batch and indicate whether
only a single batch or multiple batches of samples are gathered.
The Samples (10) numeric control is unrelated to the ADC
mode. You can capture a defined sample set or continuously
gather batches of samples. In both cases, the number of samples
set in the Samples (10) numeric input dictates the number of
samples (see Figure 8).
Sample
Click the Sample (12) button to start gathering ADC results.
Results appear in the waveform graph (13) (see Figure 8).
Waveform Graph and Controls
The data waveform graph (13) shows each successive sample of
the ADC output. The control toolbar (14) in the graph allows
you to zoom in on the data. Click the x-axis and y-axis to
change the scales on the graph (see Figure 8).
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Figure 8. Waveform Tab of the AD7172-4 Evaluation Software
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Channel Selection
The channel selection (15) control allows you to choose which
channels display on the data waveform (see Figure 8). These
controls only affect the display of the channels and do not have
any effect on the channel settings in the ADC register map.
Display Units and Axis Controls
In the display units and axis controls section (16), click the
Display Units: V/mV/ drop-down combo box to select whether
the data graph displays in units of voltages or codes (see
Figure 8). This selection affects both the waveform graph and
the histogram graph. The axis controls can be dynamic or fixed.
When Y-scale Dynamic and X-scale Dynamic are switched on,
the axes automatically adjust to show the entire range of the
ADC results after each sample batch. Click the drop down
arrows to select the Fixed option to program the axis ranges to
not adjust after each sample batch.
CRC Error
The CRC Error (17) LED icon illuminates when a cyclic
redundancy check (CRC) error is detected in the communica-
tions between the software and the
The CRC functionality on the
and must be enabled for this indicator to work.
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AD7172-4 (see Figure 8).
AD7172-4 is disabled by default