Rohde & Schwarz R&S UPP, User Manual

Page: 307 / 938

Instrument Functions
R&S
®
UPP
291 User Manual 1411.1055.32 ─ 10
The automatic sweeps are selected in the "Sweep Ctrl" parameter field, whereby the
sweep axis
●
is calculated from user entries ("Auto Sweep") or
●
is loaded with a predefined list (e.g. from a file) ("Auto List")
Next Step
Used to select the sweep stepping. Only visible for automatic 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
measured 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 affec-
ted 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, irre-
spective 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,
measured 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 gen-
erate measured 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 measured values from being deter-
mined, the measured values concerned are marked as invalid
("NAN").
Sweeps