Teledyne LeCroy WaveExpert series Automation Manual - Manual (Page 39)

C HAPTER T WO Overview
Persist
The Persist interface is most often found when using software options that create eye diagrams or other
waveshapes that are the result of overlaying multiple waveforms. (Note that this does not apply to the
Persistence display mode.) The key property in the Persist interface is the DataArray, which is a 2D
array containing the population of each pixel of the persistance map. Example paths to Persist Result
interfaces:
app.SDA.Eye.Out.Result
app.SDA.Eye2.Out.Result
Table
Table Results interfaces are used primarily used in conjunction with the various low-speed serial decoding
options, such as CAN, I2C, SPI, UART, etc. When the table is displayed, the user has access to
information about the messages decoded for the last acquisition. Retrieving data from the Table interface
involves some knowledge of the table’s structure, in terms of the columns that are displayed and the cell
types. The CellType and CallValue are the key properties to use to retrieve the table’s data. See the
information in the CellValue property for more information. Example paths to Table Result interfaces:
app.SerialDecode.Decode1.Out.Result.
app.SerialDecode.Objects("Decode2").Out.Result
Waveform
Waveform Results interfaces can be found wherever there is basic Voltage vs. Time waveforms.
Examples include channel (Cx), memory (Mx), math function (Fx) and zoom (Zx) traces, as well as others
that are associated with specific analysis packages, such as the Power waveform used in the PMA2
package. In general, these waveforms are usual voltage vs time, unless a current probe or other method
of changing the vertical units (e.g. the Rescale Math function) is employed. The key property in the
Waveform interface is the DataArray, which is a 1D array containing the value of each sample in the
waveform. Example paths to Waveform Result interfaces:
app.Acquisition.C1.Out.Result
app.Acquisition.Channels("C1").Out.Result
app.Math.F2.Out.Result
app.Zoom.Z3.Out.Result
app.SDA.Btub.out.Result
app.SDA.TIETrend.Out.Result
app.PMA.Pwr.Out.Result
(Note that traces like F2 and Z3 can hold waveforms like histograms, which do not use the
Waveform interface.)
XY
The XY interface is used on XY waveforms. Users can create an XY waveform by selecting this option in
the Display Setup… screen. XY waveforms allow you to see how the signal on one channel moves in
relation to another. The key property is the DataArray, which is a 2D array that returns the voltages on
the X and Y sources for each XY pair. Example path to the XY Result interface:
app.Math.XY.Out.Result
916435 RevA 2-3