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R&S®UPP
Instrument Function
Sweeps
"Anlr Sync"
The sweep stepping is synchronized to the analyzer, i.e. a new sweep
point is set automatically when all measurements activated in the analyzer have been completed. This setting should be selected whenever
the internal analyzer is used for sweeping. It ensures that a measurement value is determined for every sweep point with minimum sweep
time.
Note: If one or more measured values cannot be determined for a
sweep point (e.g. because the level range of the analyzer was selected
too low or the signal supplies too high of a level), the affected measured
values are marked as invalid (NAN) and the next sweep point is configured.
"Dwell Value"
The sweep stepping is time-controlled in constant intervals, i.e. a new
sweep point is set automatically if the preset time has expired, irrespective of whether the measurements activated in the analyzer have
been completed. A new measurement is started at the same time.
The user can enter the dwell time in the next parameter field.
This setting ensures that sweep stepping is carried out in a fixed time
grid. It should only be chosen if the internal analyzer is not in use, measurement values are not needed or the dwell time is longer than the
longest measurement time.
Note: Especially for frequency sweeps, the required measuring time of
the individual sweep points is very different. If it is intended to generate
measurement values, the "slowest" sweep point must be taken as a
basis when defining the necessary dwell time (for frequency sweeps
this is normally the lowest frequency). A higher sweep speed can be
achieved by using "dwell files". If the selected dwell time is too short
thus preventing one or more measurement values from being determined, the measurement values concerned are marked as invalid
("NAN").
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