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GUI Reference
R&S
®
ZNA
407
User Manual 1178.6462.02 ─ 12
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.
Possible
are ignored while the ALC loop is active. Therefore, to pro-
tect sensitive DUTs from excess input levels, a narrower control range (smaller value)
can be required. A warning in the lower left corner of the "ALC Config" dialog points out
the potential hazard.
Remote command:
SOURce<Ch>:POWer<Pt>:ALC:RANGe
Start Value: Offset
Increases/decreases the source signal level before the ALC loop is started. An appro-
priate value can speed up the ALC.
Remote command:
SOURce<Ch>:POWer<Pt>:ALC:SOFFset
ALC: Meas Port/ALC: Meas Receiver/ALC: Target Power
Defines the received signal to be used for ALC, i.e. whose power the R&S
ZNA tries to
keep at a particular target level.
For reference receivers (a waves), this "Target Power" is automatically set to the chan-
nel base power. For measurement receivers (b waves), the "Target Power" can be con-
figured in the respective column.
Remote command:
SOURce<Ch>:POWer<Pt>:ALC:RECeiver
SOURce<Ch>:POWer<Pt>:ALC:TPOWer
Couple Port Settings
Enforces identical ALC settings for the individual ports (except
). If
disabled, different settings can be made for the individual ports.
Remote command:
SOURce<Ch>:POWer<Pt>:ALC:COUPle
Apply Wave Correction
See
Remote command:
[SENSe<Ch>:]CORRection:EWAVe[:STATe]
Settling Tolerance
Defines the maximum variation of the source signal level after the ALC has settled.
The "Settling Tolerance" has an impact on the
other things being equal, the smaller the "Settling Tolerance" the smaller the auto-
selected filter bandwidth.
Remote command:
SOURce<Ch>:POWer:ALC:STOLerance
Stimulus Softtool