GUI Reference
R&S
®
ZNB/ZNBT
387
User Manual 1173.9163.02 ─ 55
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 CHANNEL – [OFF-
SET
EMBED] > "Offset" (see
Chapter 6.13.2.1, "Controls on the Offset Tab"
Remote command:
CALCulate<Chn>:TRANsform:TIME:XAXis
6.9
Power Bw Avg Softtool
The "Power Bw Avg" softtool allows you to configure the signal power, to set up the IF
signal processing, and to configure the averaging logic.
Access:
CHANNEL – [PWR
BW
AVG] hardkey
6.9.1
Power Tab
The "Power" tab allows you to configure the signal power. It is identical to the "Stimu-
lus" > "Power" tab; see
6.9.2
Bandwidth Tab
Sets the measurement bandwidth and the shape of the digital IF filter for the active
channel.
A system error correction (calibration) remains valid when the filter settings are
changed.
Power Bw Avg Softtool
