R&S ZVL
GUI Reference
Trace Menu
Operating Manual 1303.6580.32-06
185
Stimulus Frequency
Opens a submenu which gives access to the frequency stimulus axis settings for the active channel.
The stimulus frequency settings that the R&S ZVL uses for the distance-to-fault measurement are
identical with the general
Channel
–
Stimulus
settings. Previous settings are not restored when the
distance-to-fault measurement is switched off.
Remote control:
[SENSe<Ch>:]FREQuency:STARt
[SENSe<Ch>:]FREQuency:STOP
[SENSe<Ch>:]FREQuency:CENTer
[SENSe<Ch>:]FREQuency:SPAN
Auto Number of Points
Adjusts the number of sweep points in a way that guarantees
unambiguous display
of the fault locations.
Since the behavior of the DUT is measured at discrete frequency points, the impulse response resulting
from a transformation to the time/distance domain is periodic. By settings the number of points to the
value shown below, the frequency interval between the measured points
(Frequency Step Size)
is small
enough to ensure that all faults in the distance domain belong to the same period.
The required number of points depends on the frequency span (f
stop
– f
start
), the stop distance d
stop
, and the
velocity factor v of the transmission line (see
Cable Type)
. The analyzer sets the number of points N as
the nearest integer greater than or equal to the following expression:
2.6 * d
stop
* (f
stop
– f
start
) / (v * c
0
)
The minimum number of points set by
Auto Number of Points
is 201. If the calculated minimum number of
points is larger than the maximum number of points of the R&S ZVL, the analyzer generates a notice
message and also reduces the frequency span, at the expense of distance resolution.
Use
Auto Number of Points
to reduce the number of points and speed up the measurement, e.g. after
setting a smaller frequency span or stop distance.
Remote control:
CALCulate:TRANsform:DTFault:POINts
Cable Type...
Opens a dialog to select a standard (predefined) cable type or add a cable type with arbitrary parameters.
