R&S ZNB Series User Manual page 152

®
R&S ZNB/ZNBT
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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.
●
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 ZNB/ZNBT 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:
#
1
! Rohde & Schwarz Vector Network Analyzer
2
! Rohde-Schwarz,ZNB8-4Port,1311601044100019,3.20
! Created: UTC 12/24/2020, 5:20:26 PM
3
! My Comment
4
! freq[Hz]
5
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.
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Blank lines are permitted.
Option line
Each Touchstone file must contain an option line with the following structure:
User Manual 1173.9163.02 ─ 62
HZ S RI R
1.000000000000000E5
4.259950000000000E7
...
50.00
re:S11
-4.897128641605377E-1
-5.450598597526550E-1
Concepts and features
Operations on traces
im:S11
3.767784312367439E-2
3.608805686235428E-2
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