![background image](http://html1.mh-extra.com/html/rands/znb/znb_user-manual_3286757318.webp)
GUI Reference
R&S
®
ZNB/ZNBT
318
User Manual 1173.9163.02 ─ 55
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. 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-
Remote command:
CALCulate<Chn>:TRANsform:TIME[:TYPE]
CALCulate<Chn>:TRANsform:TIME:STIMulus
Impulse Response
Selects a window type which the R&S
ZNB/ZNBT uses to filter the trace in the fre-
quency 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 differ-
ent available window types. The selected window is applied to the active trace.
See also
Chapter 5.7.2.3, "Windows in the Frequency Domain"
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"
The analyzer always uses a "No Profiling (Rectangle)" window to calculate the time-
gated frequency domain trace, see
"Time-Gated Frequency Domain Trace"
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
Resolution Enh.
Broadens the frequency range that the analyzer considers for the time domain trans-
form by a linear factor. A factor of 1 means that the original sweep range and the mea-
sured sweep points are used; no additional assumptions are made. With higher resolu-
tion enhancement factors, the measurement data is extrapolated using a linear predic-
tion method. As a result, the resolution in time domain can be improved.
The ideal resolution enhancement factor depends on the properties of the DUT. For
distance to fault measurements on cables, set it to 1.
Remote command:
CALCulate<Chn>:TRANsform:TIME:RESolution:EFACtor
Trace Config Softtool