GUI Reference
R&S
®
ZNA
408
User Manual 1178.6462.02 ─ 12
Show Advanced Settings
Shows or hides advanced ALC settings:
ALC Path IF Bandwidth ← Show Advanced Settings
Selects the bandwidth in the ALC control loop.
"Auto" means, the analyzer selects the appropriate IF bandwidth, depending on the
source frequency and level.
If the
are determined automatically, then the "ALC Path IF
Bandwidth" also affects the resulting "Control Loop Parameters".
Remote command:
SOURce<Ch>:POWer:ALC:AUBW
SOURce<Ch>:POWer:ALC:BANDwidth
Control Loop Parameters ← Show Advanced Settings
Defines the tuning coefficients of the proportional-integral (PI) controller the analyzer
uses as a feedback controller for ALC; see
By default the parameters are selected by the analyzer firmware ("Coefficients" =
"Auto"). With automatic selection of the
, this is the only option.
If "ALC Path IF Bandwidth" is set manually, it is also possible to vary the proportional
gain "Kr", the integration time "Ti", and the "Control Time" manually.
The latter specifies the maximum duration of the control loop phase, per measurement
point. With "Auto Settling" enabled, the firmware exits the control loop as soon as the
convergence criteriia are met, and doesn't wait until the "Control Time" has elapsed.
Remote command:
SOURce<Ch>:POWer<Pt>:ALC:PIParameter
SOURce<Ch>:POWer<Pt>:ALC:PIParameter:GAIN
SOURce<Ch>:POWer<Pt>:ALC:PIParameter:ITIMe
SOURce<Ch>:POWer:ALC:PIParameter:CTIMe
SOURce<Ch>:POWer:ALC:PIParameter:ASETtling
6.8.3
Time Domain X-Axis Tab
If the active trace is a time domain trace, these settings define its stimulus axis.
Time domain analysis requires option R&S
ZNA-K2. If this option is not installed, the
"Time Domain X-Axis" tab is hidden.
Stimulus Softtool