UG-1896
EVAL-ADAQ23875FMCZ
User Guide
Rev. 0 | Page 8 of 26
SOFTWARE OPERATION
LAUNCHING THE SOFTWARE
When the EVAL-ADAQ23875FMCZ and
SDP-H1
boards are
properly connected to the PC, launch the
ACE
software. To
launch the
ACE
software, take the following steps:
1.
From the
Start
menu, select
All Programs
>
Analog
Devices > ACE> ACE.exe
to open the main software
window shown in Figure 10.
2.
The EVAL-ADAQ23875FMCZ icon appears in the
Attached Hardware
section.
3.
If the EVAL-ADAQ23875FMCZ is not connected to the
USB port via the
SDP-H1
board when the software is
launched, the EVAL-ADAQ23875FMCZ board icon does
not appear in the
Attached Hardware
section. Connect
the EVAL-ADAQ23875FMCZ and
SDP-H1
board to the
USB port of the PC and wait a few seconds, then continue
following these instructions.
4.
Double-click the EVAL-ADAQ23875FMCZ board icon to
open the window shown in Figure 10.
5.
Click
Software Defaults
and then click
Apply Changes
.
6.
Click
Proceed to Analysis
to open the EVAL-
ADAQ23875FMCZ analysis shown on Figure 11.
EXITING THE SOFTWARE
To exit the software, click file icon on the upper right tab and
then click
Exit
.
DESCRIPTION OF ANALYSIS WINDOW
Click
Proceed to Analysis
in the chip view window to open the
window shown in Figure 12. The analysis view contains the
Waveform
tab,
Histogram
tab,
FFT
tab,
INL
tab, and
DNL
tab.
Waveform Tab
The
Waveform
tab displays results in time domain, as shown
in Figure 13. The
Capture
pane contains the capture settings,
which reflect in the registers automatically before data capture.
Capture Pane
The
Sample Count
dropdown list in the
General Capture
Settings
section allows the user to select the number of samples
per channel per capture.
The user can enter the input sample frequency in kSPS in the
Sampling Frequency (KSPS)
box in the
General Capture
Settings
section. Refer to the
ADAQ23875
data sheet to
determine the maximum sampling frequency for the selected
mode.
Click
Run Once
in the
Device Settings
section to start a data
capture of the samples at the sample rate specified in the
Sample Count
dropdown list. These samples are stored on the
FPGA device and are only transferred to the PC when the
sample frame is complete.
Click
Run Continuously
in the
Device Settings
section
to start
a data capture that gathers samples continuously with one
batch of data at a time.
Results Pane
The
Display Channels
section allows the user to select which
channels to capture. The data for a specific channel is only
shown if that channel is selected before the capture.
The
Waveform Results
section displays amplitude, sample
frequency, and noise analysis data for the selected channels.
Click
Export
to export captured data. The waveform,
histogram, and FFT data is stored in .xml files, along with the
values of parameters at capture.
Waveform Graph
The data waveform graph shows each successive sample of the
µModule output. The user can zoom in on and pan across the
waveform using the embedded waveform tools. The channels to
display can be selected in the
Display Channels
section
.
Click the display unit’s dropdown list (shown with the
Codes
option selected in Figure 13) to select whether the data graph
displays in units of hexadecimal, volts, or codes. The axis
controls are dynamic.
When selecting either y-scale dynamic or x-scale dynamic, the
corresponding axis width automatically adjusts to show the
entire range of the µModule results after each batch of samples.
Histogram Tab
The
Histogram
tab contains the histogram graph and the
Results
pane, as shown in Figure 14.
The
Results
pane displays the information related to the dc
performance.
The histogram graph displays the number of hits per code
within the sampled data. This graph is useful for dc analysis
and indicates the noise performance of the device.
FFT Tab
The
FFT
tab displays FFT information for the last batch of
samples gathered, as shown in Figure 15. The FFT also allows
the oversampling function with OSR up to 256×, as shown in
Figure 18. As a general rule, oversampling by a factor of four
provides one additional bit of resolution, or a 6 dB increase in
dynamic range (DR) of the
ADAQ23875
. In other words,
ΔDR
= 10 × log10 (
OSR
) (in dB)
INL, DNL Tab
The
INL
and
DNL
tab displays linearity analysis. INL is the
deviation of each individual code from a line drawn from
negative full scale through positive full scale. The point used as
negative full scale occurs ½ LSB before the first code transition.
Positive full scale is defined as a level 1½ LSB beyond the last
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