Rohde & Schwarz SMU200A - Multi Carrier Waveforms

Instrument Function
R&S
®
SMU200A
412Operating Manual 1007.9845.32 ─ 15
3. "Trigger Source" = "Internal or External"
If the waveforms have different sample rates:
4. "Clock Mode" = "Highest" or "User" (when creating the waveform in the Multi Segment
Editor)
5.8.4.3 Multi Carrier Waveforms
Multi carrier waveforms consisting of up to 32 carriers modulated by user-selectable
baseband signals can be created in order to simulate complex multi carrier scenarios with
different baseband signals (e.g. CDMA2000 or 3GPP FDD).
The carriers are equally spaced and centered toward the RF frequency or baseband DC
line, respectively. The carrier spacing is adjustable within the total available baseband
bandwidth of 80 MHz. Each carrier can be separately defined in terms of power, phase
and modulated input signal. Optionally, crest factor optimization can be applied.
Thus, multi carrier waveforms can be very easily configured as broadband test signals
and used for such purposes as transmitter or receiver tests. In addition. Even complex
multi carrier scenarios composed of signals from different digital standards can be cre-
ated and used for these tests.
Example for the creation of a multi carrier waveform file.
1. Configure general settings
2. Configure carrier table
3. Enter file name of multi carrier waveform ("Output File")
4. Save and load multi carrier waveform ("Create" or "Create and Load")
To access the "Multi Carrier" dialog, select "Baseband > ARB > Multi Carrier...".
The menu can be used to create a multi carrier waveform and save it under its own name.
As with normal waveforms, the file extension is *.wv. Information on clock rate, number
of samples and creation day is displayed in the File menu when a waveform is loaded.
The "Multi Carrier" dialog is divided into the following sections.
The upper part of the menu is used for calling the default settings and saving and recalling
the submenu settings.
The General Settings section is used to configure the main multi carrier waveform.
Baseband Signal - Baseband Block