VNA GUI Reference
R&S
®
ZNL/ZNLE
293
User Manual 1178.5966.02 ─ 07
Remote command:
CALCulate<Chn>:TRANsform:TIME:STARt
CALCulate<Chn>:TRANsform:TIME:STOP
CALCulate<Chn>:TRANsform:TIME:CENTer
CALCulate<Chn>:TRANsform:TIME:SPAN
Distance Start / Distance Stop / Distance Center / Distance Span
Defines the display range for the time domain trace in distance representation (see
"Distance Start" and "Distance Stop" or "Distance Center" and "Distance Span" are
alternative settings.
Remote command:
n.a.
See
"Time Start / Time Stop / Time Center / Time Span"
Time / Distance
"Time" and "Distance" switch over between the x-axis scaling in time units or distance
units.
The interpretation of time and distance depends on the measurement type. For reflec-
tion measurements (S-parameters S
ii
or ratios with equal port indices), the time axis
represents the propagation time of a signal from the source to the DUT and back. For
transmission measurement, it represents the propagation time from the source through
the device to the receiver.
The distance between the source and the DUT is calculated from the propagation time,
the velocity of light in the vacuum, and the velocity factor of the receiving port:
●
Distance = <Time> * c
0
* <Velocity Factor>
for transmission measurements
●
Distance = 1/2 * <Time> * c
0
* <Velocity Factor>
for reflection measurements. The
factor 1/2 accounts for the return trip from the DUT to the receiver.
The velocity factor of the receiving port can be defined using [Offset
Embed] > "Offset"
"Permittivity / Velocity Factor"
Remote command:
CALCulate<Chn>:TRANsform:TIME:XAXis
9.3
Scale Softtool
The "Scale" softtool allows you to define how the active trace is displayed in its current
format.
Scale Softtool
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