Rohde & Schwarz SMU200A - Page 434

Instrument Function
R&S
®
SMU200A
414Operating Manual 1007.9845.32 ─ 15
From the "Save/Recall" menu the "File Select" windows for saving and recalling the con-
figurations of the ARB "Multi Carrier" submenu and the "File Manager" can be called.
SCPI command:
[:SOURce<hw>]:BB:ARB:MCARrier:SETTing:LOAD on page 609
[:SOURce<hw>]:BB:ARB:MCARrier:SETTing:STORe on page 609
General Settings
The "General Settings" section is used to configure the Multi Carrier signal.
Number of Carriers
Sets the number of carriers for the multi carrier waveform.
By default the multi carrier table lists 1 carrier. A maximum of 32 carriers can be config-
ured and activated.
When the number of carriers is increased, the multi carrier table is extended by adding
further lines at the end of the table. If these carrier already have been defined before, the
settings are preset according to the former settings. Otherwise the parameters are preset
with the default values.
SCPI command:
[:SOURce<hw>]:BB:ARB:MCARrier:CARRier:COUNt on page 598
Carrier Spacing
Sets the frequency spacing between adjacent carriers of the multi carrier waveform.
The carriers are arranged symmetrically around the RF carrier.
The maximum carrier spacing is limited to
Carrier spacing = Total baseband bandwidth /(Number of carriers - 1);
The total baseband bandwidth is 80 MHz.
Note: In order to avoid wrap-around problems, the effective "Carrier Spacing" might be
slightly modified.
The Carrier Spacing is rounded in that way that the carrier closest to the center RF fre-
quency shows no phase jump assuming that the carrier is unmodulated.
●
For odd number of carriers:
RoundedCarrierSpacing=1/OutputSignalDuration* round(CarrierSpacing * Output-
SignalDuration);
●
For even number of carriers:
RoundedCarrierSpacing=2/OutputSignalDuration*round(0.5 *CarrierSpacing *Out-
putSignalDuration).
SCPI command:
[:SOURce<hw>]:BB:ARB:MCARrier:CARRier:SPACing on page 599
Crest Factor Mode
Selects the mode for optimizing the crest factor by calculating the carrier phases.
Baseband Signal - Baseband Block