R&S 1332.4500K22, User Manual

Page: 479 / 1709

GUI reference
R&S
®
ZNA
479 User Manual 1178.6462.02 ─ 20
Initially, the "ALC Config" dialog only displays basic settings. For full details, enable
Show Advanced Settings .
ALC On
Enables/disables automatic level control (ALC) for the current channel.
If mm-wave converters are involved in the setup, the VNA firmware checks whether
suitable leveling data are active. Otherwise a warning message is displayed and ALC
remains disabled (although the checkbox is checked).
Use Power Cal dialog – Leveling Table to create a leveing dataset and Leveling Data-
sets dialog to activate it. For background information see "ALC with mmWave convert-
ers" on page 93.
Remote command:
SOURce<Ch>:POWer:ALC:CSTate
ALC On (table area)
Enables or disables ALC for the respective port.
Remote command:
SOURce<Ch>:POWer<Pt>:ALC[:STATe]
Control Range +/-
"Control Range +/-" is the maximum change of the source signal level due to the ALC.
A value of 5 dB (default) means that the source signal level can be adjusted in a 10 dB
wide symmetric range around the start value. A value of 0 dB effectively disables the
ALC. With a wider control range, the ALC can compensate for larger attenuation/gain
factors. A narrow control range is often sufficient if the source power is relatively well
known, e.g. from a previous power calibration.
Stimulus softtool