R&S 1332.4500K22, User Manual

Page: 404 / 1709

GUI reference
R&S
®
ZNA
404 User Manual 1178.6462.02 ─ 20
Type
Selects a band pass or low pass time domain transform. See Chapter 4.7.2.2, "Band
pass and low pass mode" , on page 221.
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 5.5.5.2, "Low Pass Settings dia-
log" , on page 405.
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 4.7.2.3, "Windows in the frequency domain" , on page 222.
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 5.5.6, "Time Gate tab" , on page 407).
The analyzer always uses a "No Profiling (Rectangle)" window to calculate the time-
gated frequency domain trace, see
"Time-gated frequency domain trace" on page 225.
Remote command:
CALCulate<Chn>:TRANsform:TIME:WINDow
Side Lobe Level
Defines the side lobe suppression for an "Arbitrary Sidelobes (Dolph-Chebychev)" win-
dow. The entered value is the ratio of the power of the central lobe to the power of the
first side lobe in dB.
Remote command:
CALCulate<Chn>:TRANsform:TIME:DCHebyshev
Traces softtool