R&S ZVB - Page 207

R&S
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ZVA / R&S
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ZVB / R&S
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ZVT GUI Reference
Trace Menu
Operating Manual 1145.1084.12 – 30 192
an ASCII (*.csv) file.
 Ask before Overwriting activates a message box to be displayed before an older trace file with the
same file name and directory is overwritten.
 Export All Channels causes the analyzer to export the trace data for all channels in the current
setup to separate ASCII or Matlab files. The selected file name is automatically extended by the
channel identifier, e.g.: <File name>Ch1.csv, <File Name>Ch2.csv... This option is not available
for Touchstone files.
 Add Ref. Impedances includes the reference impedance of the analyzer ports in the file header of
the ASCII (*.csv) or Matlab file. The value is displayed in the Impedance field.
 Impedance indicates the reference port impedance that is written into the generated ASCII (*.csv)
or Matlab file. For Touchstone (*.s1p) files, the value is editable, however, no renormalization of
S-parameters is performed. The default reference impedance is equal to the reference impedance
of the physical ports, as defined in the Port Configuration dialog (or 1 Ω, if the reference
impedances are ambiguous).
Exported complex data is never renormalized.
Selecting an appropriate file format
Use a Touchstone file format to export single-ended S-parameter data traces to a file that can be
evaluated with applications such as Agilent's Microwave Design System (MDS) and Advanced Design
System (ADS), and to convert mixed mode parameters back to single-ended parameters. The data must
be acquired in a frequency sweep. Note the conditions for Touchstone file export in section Select Ports.
Use the ASCII (*.csv) format if you want to do one of the following:
 Import the created file into a spreadsheet application such as Microsoft Excel.
 Export an arbitrary number of traces, multiple traces with the same parameter or memory traces.
 Export traces acquired in a power sweep or CW sweep.
 Use export options.
Use a the Matlab (*.dat) format if you want to import and process the trace data in Matlab.
For more information see Trace File Formats.
Remote control:
MMEMory:STORe:TRACe
MMEMory:STORe:TRACe:CHANnel
Export Formatted Data...
Calls up a dialog to store data or memory traces with their current trace format and stimulus values to an
ASCII (*.csv) or Matlab file. Only the displayed values of the trace (e.g. the logarithmic magnitude, if
trace format dB Mag is selected) are exported. Therefore the trace file does not necessarily contain the full
(complex) information about the trace. See Complex vs. Formatted Data.
The exported formatted values correspond to the results in the marker info field. For trace formats
involving Cartesian diagrams (dB Mag, Real, Imag...), the stimulus value and a single real response value
are exported. For circular diagrams, both the real and imaginary part of the response value is exported.
An exported formatted trace can be processed and evaluated in an external application. Re-import into the
analyzer is only possible if the complex trace values are exported; see Import Complex Data.