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Instrument Function
R&S
®
SMBV100A
144
Operating Manual 1407.6062.32 ─ 08
5.3 Graphical Display - Graphics
The R&S Signal Generator can be used to graphically display the generated baseband
signal. A selection of different signal displays assists the user in assessing and checking
the increasingly complex modulation signals.
The Graphics function block is available for instruments with the option:
●
R&S SMBV-B10/B50/B511 (Ba ARB)
●
R&S SMBV-B62 (Noise Generator)
It is the baseband signal actually generated that is recorded and displayed, and not a
signal calculated on the basis of the set parameters.
This graphical display allows the user to quickly view and check the current signal char-
acteristics and also gives an overview of the changes in the signal over time. The signal
quality can be permanently monitored. The results of parameter changes on the signal,
such as a change in modulation mode, or the effects of certain configurations, e.g. the
activation of several base stations in the case of (W)CDMA signals, can be analyzed
directly in the display. Freezing the signal and then zooming permit a detailed evaluation
of any signal segment. The definition and display of one or more reference curves makes
it possible to compare various signals (i.e. by comparing the CCDF (Complementary
Cumulative Distribution Function) with different channelization codes, or the spectra if
different filter parameters are selected).
The displayed signal segment can be influenced by selecting the trigger that defines the
time for recording to start. With automatic triggering, the signal is tapped at the point in
the signal path that is best for the respective display. The displayed signal segment is
selected internally depending on the signal such that the signal characteristics of interest
(e.g. the useful signal) are displayed. This selection is appropriate for a representative
display of the complete signal.
In addition, a user-definable trigger is available with which the displayed signal segment
can be limited.
The time resolution can be set either automatically or manually, whereby for manual
setting the bandwidth for which the trace is to be displayed is selected. The transient
recorders used for signal recording have a variable recording depth which is specified
under the respective display.
In addition to the large graphics window, the display can also be shown in a small window
("smart graphics"). This window is fitted into the block diagram as a block, and can be
used for basic checking purposes (e.g. whether the signal is still being generated).
Graphical Display - Graphics
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