Rohde & Schwarz 1145.1010.04/05/06, Operating Manual

Page: 244 / 813

Trace Menu R&S
®
ZVA/ZVB/ZVT
1145.1084.12 4.82 E-6
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 Mathlab (*.dat) format if you want to import and process the trace data in Mathlab.
For more information see Trace File Formats.
Remote control:
MMEMory:STORe:TRACe "<trc_name>","<file_name>",FORMatted
Trace File Formats
Trace files are ASCII files with selectable file format. The analyzer provides two classes of trace files:
•
Touchstone (*.s<n>p) files
•
ASCII (*.csv) files
•
Mathlab (*.dat) files are ASCII files which can be imported and processed in Mathlab.
The trace file formats complement each other; see Selecting an appropriate file format.
Touchstone files
All Touchstone files contain a header, a comment section, and the actual trace data:
# HZ S RI R 50.0000
! Rohde & Schwarz ZVA
! Measurement: S11
! 2003-07-07
!
60297750.000000 0.498113 -0.054290
80297000.000000 0.504888 -0.081229
...
The header consists of the following data elements:
# specifies beginning of header line (required at top of file). <Frequency unit> HZ / KHZ / MHZ /
GHZ allowed for imported files. The analyzer always uses HZ for exported data.
<Data file type> at present: S for S-parameter files.
<Data format> RI for Re/Im, MA for lin. Mag-Phase, DB for dB Mag-Phase. The data format for
export files can be selected in the Export Data dialog.
<Normalizing impedance> Impedance system in which the data was defined. The analyzer uses
50.0000 .
Comment lines start with the exclamation mark (!) and may contain any text used for documentation of
the trace data file. Any number of comment lines may be inserted before or after the header line.
The trace data depend on the number of ports <n> and the data format. For real and imaginary values
(data format = RI) the trace data for each stimulus frequency are arranged as follows:
•
1-port files (*.s1p)
•
Freq Re(S11) Im(S11)
•
S11 can be replaced by an any S-parameter, so the *s1p format is suitable for exporting an
arbitrary data trace representing an S-parameter.
•
2-port files (*.s2p)