GUI Reference
R&S
®
ZNC
282
User Manual 1173.9557.02 ─ 13
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Learn Sweep
: During the learn sweep, the analyzer determines the appropriate static
gain settings for the measured a- and b-waves, i.e. for all a- and b-waves measured
in the current channel. The acquired settings can be overwritten manually.
At the start of the learn sweep, "Auto" mode is selected for each drive port ("Reset")
and a single shot measurement of the current channel is initiated.
During this measurement the VNA software observes the "Low Distortion" (LD) vs.
"Low Noise" (LN) gain decisions of the AGC and derives the statically assigned gain
for the individual sweep segments / drive ports / receivers as follows:
–
if LD was selected for any of the related measurement points, then LD is assigned
–
otherwise LN is assigned
In other words, LN is assigned if and only if LN was selected for all related measure-
ment points.
Note:
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Without the
option only the AGC of the measurement receiv-
ers (the b-waves) can be statically set to "Low Dist" or "Low Noise"; the reference
receiver AGC mode is always set to "Auto" (see
on page 281). With the
option available, also the AGC of the reference receivers (the a-waves) can be set
statically.
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Before running the "Learn Sweep", create the adequate port configuration and add
the required traces.
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The "Learn Sweep" is not available for power sweep channels.
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The increase in measurement speed for settings "Low Dist" and "Low Noise" is not
achieved if the AGC mode of one of the receivers is set to "Auto".
Remote command:
Segmented AGC
"Segmented AGC" enables segment specific gain settings. It is available for segmented
sweep type only.
Remote command:
Channel Settings
