Configuring the internal baseband source
R&S
®
SMM100A
202
User Manual 1179.1341.02 ─ 05
rate by resampling. Another advantage of this procedure is the scaling of the instanta-
neous amplitude of the various waveforms to a common RMS level.
4.9.2.3
File concept
To provide flexible configuration, the building of a composed multi-segment waveform
file involves different stages; by completing of each of them, the R&S
SMM100A cre-
ates and stores a dedicated file. The following files are used:
●
Configuration list:
is a dedicated file with details on how a multi-segment wave-
form is made up from different waveforms, the level and the clock rate settings, and
the filename. The file extension is
*.inf_mswv
.
You can create any number of configurations as a basis for defining further multi-
segment waveforms.
●
Output file:
is the created output multi-segment waveform file. The
R&S
SMM100A stores it under a user definable name; as with the standard wave-
forms, the used file extension is
*.wv
. The instrument appends additional informa-
tion to the header of the composed waveform file, e.g. user comments.
●
Sequencing list:
are files created in the "Multi Segment Waveform Sequencing"
dialog, i.e. when the ARB sequencer mode is used (see
The sequencing list file has an extension
*.wvs
and is automatically assigned to
but independent from the multi-segment file. By default, both files have the same
name and are located in the same file directory. You can create more than one
sequencing list file per multi-segment waveform file.
The sequencing list file carries information only about the segment number, the
corresponding waveform filenames are retrieved from the assigned multi-segment
waveform file. That is, the same sequencing list file can be reused for different
multi-segment waveform files with the same number of segments.
Changes and recalculations of a multi-segment waveform file cause a recheck
whether the assigned sequencing list files are still valid. A message is displayed to
inform about necessary corrections in the “play list”.
4.9.2.4
Impact of the marker settings
The general purpose of the marker signal is the triggering of the DUT (device under
test) and the synchronization with other measurement instruments.
For better flexibility, the instrument provides several possibilities to define marker sig-
nals:
●
Segment markers
Because the multiple segments are standalone waveforms, they can already carry
marker signals. You can define how the instrument processes these available
marker signals. The instrument can ignore them or use them in the composed
multi-segment waveform.
●
Additional segment restart and sequence restart markers
Additional marker signal can be defined to restart the multi-segment sequence or
to restart each of the multiple segments. A marker output configured and defined
Generating multi-segment waveform files
