Concepts and features
R&S
®
ZNA
150User Manual 1178.6462.02 ─ 20
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ASCII ("*.csv") files
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Matlab ("*.dat") files are ASCII files which can be imported and processed in Mat-
lab.
The trace file formats complement each other; see Chapter 4.4.2.3, "Finding the best
file format", on page 158.
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When exporting traces to a file, it is recommended to set the analyzer to single
sweep mode (Channel – [Sweep] > "Sweep Control" > "All Channels on Hold").
This mode ensures that a complete sweep is exported.
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The number of decimal places of stimulus and data values in export files is configu-
rable.
4.4.2.1 Touchstone files
The Touchstone file format is a standard for the transfer of frequency-dependent net-
work data. Based on information from Agilent Corporation (the originator of Touch-
stone), formal specifications were produced by the EIA/IBIS Open Forum.
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Touchstone File Format Specification Rev 1.1
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Touchstone File Format Specification Version 2.0
The R&S ZNA supports Touchstone file versions 1.1 and 2.0.
By convention, Touchstone files use file extensions .snp, where n is the number of
network ports. The following displays an s1p export file in "Version 1.1 (ZNx)" format:
# HZ S RI R 50.00
! Rohde & Schwarz Vector Network Analyzer
! Rohde-Schwarz,ZNA26-4Port,1332450024100005,2.20
! Created: UTC 12/24/2020, 5:20:26 PM
! My Comment
! freq[Hz] re:S11 im:S11
1.000000000000000E7 5.067533850669861E-1 -4.535870999097824E-2
1.424500000000000E8 4.869025051593781E-1 -1.263110041618347E-1
...
1
3
4
5
2
6
1
= option line
2 = VNA identification comment
3 = timestamp comment
4 = user-defined comment
5 = network data table header comment
6 = network data table
General syntax rules
Among others, the following general syntax rules apply:
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Touchstone files are ASCII files, 8-bit encoded using ISO/IEC 8859-1:1998. Only
the graphical characters 0x20 to 0x7E, the tab character 0x09, and the three line
termination sequences LF (0x0A), CR+LF (0x0D + 0x0A), and CR (0x0Dh) are
allowed.
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Touchstone files are case-insensitive.
Operations on traces
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