Description Of User Panel; Changes To Description Of User Panel Section - Analog Devices PulSAR AD7685 Manual

UG-340

DESCRIPTION OF USER PANEL

The following is the description of the user panel:
1. File menu with choice of
a. Load Data: load previously captured data
b. Save Data as .tsv: save captured data in tsv (tab
separated values) format for future analysis
c. Save Picture: use to save the current screen capture
d. Print
e. Exit
2. When hardware is connected to the USB port, the software
automatically detects which generic is connected and displays
it here. Without hardware, the software can be operated in
standalone mode for data analysis, and the device information
notes the device number pulled from the saved data file.
3. Sampling Frequency: The default sampling frequency
matches the maximum sample rate of the ADC connected
to the board. The user can adjust the sampling frequency;
however, there are limitations around the sample frequency
related to the SCLK frequency applied. The sample frequency
must be an integer divider of the SCLK frequency. In addition,
where unusable sample frequencies are input, the software
automatically adjusts the sample frequency accordingly.
Units can be entered, such as 10k for 10,000 Hz. Because
the maximum sample frequency possible is device dependent,
with some of the ADCs capable of operating up to 250 kSPS,
while others can go to 1.3 MSPS, the software matches the
particular ADC ability. If the user enters a value larger than
the ability of the existing device, the software indicates this
and reverts to the maximum sample frequency.
4. sCLK Frequency: The default SCLK frequency is set to
60 MHz, which is the maximum allowable from the SDP.
The SCLK is applied to the ADC SCK pin. The SDP board
limits the SCLK frequency; nominal values for correct
operation are 60 MHz, 30 MHz, and 20 MHz. Where the
user adjusts the SCLK/sample rate to values that are not
supported by the SDP clock or the ADC sample rate, the
software overrides by adjusting values accordingly and
identify this to the user (see Figure 21). The SCLK frequency
is rounded down.
Figure 21. Software Overwritten User Settings to a Sample Rate/SCLK Rate
5. External Reference Voltage. By default, this reference is 5 V
(ADR435
voltage calculations are based on this reference voltage. If
the user changes the reference voltage, this input must be
changed accordingly.
6. Click Read to perform a single capture.
7. Click Start Stream to perform a continuous capture from
the ADC.
8. Click Stop Stream to stop streaming data.
9. Select the number of samples (Num Samples) to analyze.
10. There are four tabs available that display the data in
different formats:
a.
Waveform
b. Histogram
c. FFT
d. Summary
To exit the software, go to File > Exit or use the EXIT button in
the bottom left corner.
Within any of the chart panels, the tools shown in Table 4 allow
user control of the different chart displays.
Table 4.
Symbol
To save the plot, click Save Plot.
Rev. C | Page 10 of 31
8-/10-Lead PulSAR User Guide
Suitable for SDP Data Transfer
on-board reference). The minimum/maximum
Description
This tool is used to control the cursor, if present.
This tool is used to zoom in and out.
This tool is used for panning.