R&S ZNB Series User Manual page 762

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R&S ZNB/ZNBT
Power Mode at Sweep End ← Power Reduction at Sweep End
The analyzer offers three power modes at sweep end:
●
"Auto" results in the shortest measurement time (default setting). If enabled, at
sweep end the output power of the first measurement point is restored. The config-
ured
●
"Reduce" is intended for measurements on sensitive DUTs (primarily: power
sweeps). If enabled, at sweep end the output power of the driving port is reduced
as if the channel base power was set to its minimum possible value. The config-
ured settling delay is applied.
●
"Keep" is intended for power sweeps. If enabled, at sweep end the output power of
the last measurement point is kept. The configured settling delay is applied.
See
Note:
●
Compared to "Auto" mode, "Reduce" and "Keep" can result in significantly longer
measurement times - in particular if an extended settling delay is used.
●
The output power is not altered if there is only a single channel with a single driving
port, performing a "Time" or "CW Mode" sweep.
●
In triggered mode, the analyzer always uses the settings of the first measurement
point while waiting for the trigger signal.
Remote command:
SOURce:POWer:SWEepend:MODE
Settling Delay / Reset Delay ← Power Reduction at Sweep End
If Power Mode at Sweep End
the time between
tration.
Use the "Reset Delay" button to adjust the "Settling Delay" to its default value.
Remote command:
SOURce:POWer:SWEepend:SDELay
External Generators > Minimum Settling Delay
Defines the minimum settling delay for external generators. The delay is enforced:
●
whenever settings are applied to a driving generator port, i.e. as a minimum delay
between the setting and the actual measurement
●
irrespective of the sweep type, and whether the generator actually sweeps
Factory default is 180 µs.
Remote command:
SOURce:POWer:GENerator:SDELay
Global AGC (R&S ZNB only!)
Allows you to select between two
"Memory AGC"
(factory
default)
"Point AGC"
User Manual 1173.9163.02 ─ 62
Settling Delay is not applied.
Figure 5-89 for an illustration.
Restart Sweep
Optimized gain control pre-measurement: only if required and for as
few sweep points as possible.
Legacy AGC algorithm: gain control pre-measurement at every
sweep point.
Typically significantly slower than "Memory AGC".
is set to "Reduce" or "Keep", the "Settling Delay" defines
request and sweep start. See
AGC algorithms:
GUI reference
Setup softtool
Figure 5-89 for an illus-
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