Rohde & Schwarz 1332.4500.22, User Manual

Page: 332 / 1476

GUI Reference
R&S
®
ZNA
332 User Manual 1178.6462.02 ─ 12
Trace settings in time domain representation
While the time domain representation is active, the trace settings behave as follows:
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The "Start" and "Stop" settings in the "Time Gate" tab configure the time axis.
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All trace formats including the circular diagrams are available.
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Limit lines can be defined like the limit lines for time sweeps.
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The bandfilter search functions are available for the transformed trace.
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If marker coupling is active, then the markers in the time domain and in the fre-
quency domain are coupled with each other.
The analyzer places no restriction on the measured quantities to be transformed into
the time domain. Impedances and admittances are first converted back into the equiva-
lent S-parameter, transformed, and restored after the transformation.
See also Chapter 5.7.2.1, "Chirp z-Transformation" , on page 186.
Remote command:
CALCulate<Chn>:TRANsform:TIME:STATe
Type
Selects a band pass or low pass time domain transform. See Chapter 5.7.2.2, "Band
Pass and Low Pass Mode" , on page 187.
To calculate a low pass transform, the sweep points must be on a harmonic grid. Oth-
erwise the analyzer can only calculate an approximate result and generates a warning.
"Low Pass Settings..." opens a dialog that allows to establish or change a harmonic
grid (not available for memory traces). See
Chapter 6.5.5.2, "Low Pass Settings Dia-
log" , on page 334.
For the "Low Pass Step" response transform, it is recommended to activate Dynamic
Bw at Low Frequencies . A dialog prompts you to do so:
Remote command:
CALCulate<Chn>:TRANsform:TIME[:TYPE]
CALCulate<Chn>:TRANsform:TIME:STIMulus
Impulse Response
Selects a window type which the R&S ZNA uses to filter the trace in the frequency
domain. The drop-down list shows the impulse response of a constant trace over a
finite sweep range (i.e. a rectangular function) that was filtered using the different avail-
able window types. The selected window is applied to the active trace.
See also Chapter 5.7.2.3, "Windows in the Frequency Domain" , on page 188.
Note: The frequency domain window is used to filter the trace before transforming it to
the time domain. An independent "Time Gate" can be used after the transformation to
eliminate unwanted responses (see
Chapter 6.5.6, "Time Gate Tab" , on page 336).
Traces Softtool