Configuring the Internal Baseband Source
R&S
®
SMW200A
357User Manual 1175.6632.02 ─ 16
Because clipping reduces also the RMS level, the resulting crest factor of the clip-
ped signal is slightly above the "Target Crest Factor".
●
Target crest factor: determines the desired crest factor. A value above the crest
factor of the unclipped multicarrier signal has no effect.
●
Filter cutoff frequency: determines the filter parameter of the final lowpass filter.
When the cutoff frequency is set as half of the output sample rate, a final lowpass
filter improves the spectrum of the clipped multicarrier signal. However, it can also
increase the resulting crest factor.
4.9.3 Multi-Carrier Settings
Access:
► Select "Baseband > ARB > General > Create Multi Carrier".
The "ARB: Multi Carrier" dialog enables direct configuration of the carrier distribu-
tion around the center frequency and adjusting some parameters for improving the
signal characteristics.
The dialog is divided into several tabs. In each case, the current setting is dis-
played in the tab name. The tab "Carrier Table" enables the selection of the wave-
form files to be processed. Use the "Carrier Graph" to visualize the configured sig-
nal.
The remote commands required to define these settings are described in Chap-
ter 13.18.4.3, "SOURce:BB:ARBitrary Subsystem", on page 919.
Settings:
● General Settings................................................................................................... 357
● Carrier Table Settings........................................................................................... 365
● Carrier Table Assistant..........................................................................................367
● Carrier Graph........................................................................................................ 369
4.9.3.1 General Settings
Access:
► Select "Baseband > ARB > General > Create Multi Carrier".
This tab comprises settings for selecting the output waveform file, enabling the genera-
tion, and the configuration of the carrier distribution.
Generating Multi-Carrier Signals
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