Concepts and Features
R&S
®
ZNC
66
User Manual 1173.9557.02 ─ 13
data line is terminated by a new line character. All data sets are arranged in increasing
order of frequency.
When exporting traces to a Touchstone file, it is recommended to set the analyzer to
single sweep mode (Channel – Sweep – Single (All Chans)). This will ensure that a com-
plete sweep is exported.
Conditions for Touchstone file export
●
For a one-port Touchstone file, the reflection coefficient for the specified port (e.g.
S
11
for port no. 1) must be measured. If a full one-port ("Refl OSM") calibration is
available, it is also possible to export transmission parameters that are related to the
calibrated port. If a full n-port (TOSM, TNA, TRL ...) calibration is available for a group
of n ports, or if a complete set of <n>
2
S-parameters is available, all S-parameters
may be exported.
Example 1:
Refl OSM calibration at port 1; the active channel contains the traces
S
11
, S
21
, and S
12
; Touchstone export via "s1p Port 2...". Export of S
12
or S
21
is allowed.
●
For a multiport Touchstone file
*.s<n>p
,
either
a full multiport system error correc-
tion
or
a complete set of <n>
2
S-parameters must be available. Export of system error
corrected, incomplete S-parameter sets is possible, too. If the port configuration con-
tains balanced ports, the Touchstone file will contain the converted single-ended S-
parameters.
Touchstone files cannot be used to export mathematical traces.
3.4.2.2
ASCII (*.csv) Files
An ASCII file contains a header and the actual trace data:
freq;reTrc1_S21;imTrc1_S21;reMem2[Trc1]_S21;imMem2[Trc1]_S21;
300000.000000;0.000000;0.000000;0.000000;0.000000;
40499497.487437;0.000000;0.000000;0.000000;0.000000;
80698994.974874;0.494927;-0.065174;0.500833;-0.074866;
120898492.462312;0.497959;-0.111724;0.488029;-0.107375;
...
The header consists of the following data elements:
●
<Stimulus> stimulus variable: freq for Frequency sweep, power for Power sweep,
time for Time sweep, trigger for CW Mode sweep.
●
<reTrace1> first response value of first trace: re<Trace_Name>, mag<Trace_Name>
or db<Trace_Name> for output format Re/Im, lin. Mag-Phase or dB Mag-Phase,
respectively. The data format for export files can be selected in the Export Data dialog.
●
<imTrace1> second response value of first trace: im<Trace_Name> for output format
Re/Im, ang<Trace_Name> for output formats lin. Mag-Phase or dB Mag-Phase. The
data format for export files can be selected in the Export Data dialog.
Operations on Traces
