GUI Reference
R&S
®
ZNC
160
User Manual 1173.9557.02 ─ 13
Time Domain
Selects the time domain representation for the active diagram area. The softkey is
enabled if a linear frequency sweep ("CHANNEL > SWEEP > Sweep Type > Lin. Fre-
quency") is active. The analyzer automatically quits time domain representation as soon
as a different sweep type is selected.
The time domain results are obtained by transforming the measured frequency sweep
data into the time domain using an appropriate mathematical transformation type and
frequency window ("Impulse Response"). The sweep range and the output power for the
active channel is still displayed below the diagram; the displayed time interval is shown
in a second line:
Trace settings in time domain representation
While the time domain representation is active the trace settings behave as follows:
●
The "Start" and "Stop" settings in the "Time Gate" tab configure the time axis.
●
All trace formats including the circular diagrams are available.
●
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.
●
If marker coupling is active, then the markers in the time domain and in the frequency
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 equivalent
S-parameter, transformed, and restored after the transformation.
See also
chapter 3.7.1.1, "Chirp z-Transformation"
Remote command:
Type
Selects a band pass or low pass time domain transform. See
To calculate a low pass transform the sweep points must be on a harmonic grid (otherwise
the analyzer will only be able to calculate an approximate result and generate a warning).
"Low Pass Settings"... opens a dialog to establish or change a harmonic grid (not avail-
able for memory traces).
See
chapter 4.2.4.8, "Low Pass Settings (Dialog)"
Remote command:
Impulse Response
Selects a window type which the R&S ZNC 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 available window
types. The selected window is applied to the active trace.
See also
chapter 3.7.1.3, "Windows in the Frequency Domain"
Trace Settings