UG-1820
Rev. 0 | Page 13 of 24
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Figure 18.
Voltage Waveform
Tab
WAVEFORM TABS
The
software has two different waveform tabs:
Voltage Waveform
and
Ch Waveform
(in advanced mode only).
The waveform tabs graph the conversions gathered and processes
the data, calculating the
P - P Noise
,
RMS Noise
, and resolutions
(see Figure 18). The
Voltage Waveform
tab graphs the data at
the voltage input in quick start mode. The
Ch
Waveform
tab
shows the data converted per channel in advanced mode.
Waveform Graph and Controls
The data waveform graph (Label 14 in Figure 18) shows each
successive sample of the ADC output. Zoom in on the data in the
graph using the control buttons (Label 15 in Figure 18). Change
the scales on the graph by typing values into the x-axis and y-axis.
Samples
The
Samples
box (Label 16 in Figure 18) and
Sampling Mode
(Label 17 in Figure 18) set the number of samples gathered per
batch. If
Sampling Mode
is set to
Single
Capture
, the ADC
returns the number of samples specified in the
Samples
box. If
Sampling Mode
is set to
Continuous
, the ADC continuously
returns samples until stopped by the user.
Samples
specifies the
amount of samples to be shown on the data graph.
Samples
is
unrelated to the ADC mode.
Sample
Click
Sample
(Label 18 in Figure 18) to start gathering ADC
results. Results appear in the waveform graph.
Plot Selection
The plot selection control area (Label 19 in Figure 18) allows
the user to select which inputs display on the data waveform
and shows the name of the input.
These controls only affect the waveform graphs and have no
effect on the channel settings in the ADC register map.
Display Units and Axis Controls
Click the
Units: V/mV/uV/nV
box in the
Graph Configuration
area (Label 20 in Figure 18) to select whether the data graph
displays units of voltage in amps or codes. This control is
independent for each graph. The
Y-scale: Autoscale
and
X-scale:
Autoscale
boxes can be set to autoscale or fixed scaling. When
Autoscale
is selected, the axis automatically adjusts to show the
entire range of the ADC results after each batch of samples. When
Fixed
is selected, the axis range can be set by the user. These
ranges do not automatically adjust after each batch of samples.
