Configuring the Internal Baseband Source
R&S
®
SMW200A
387User Manual 1175.6632.02 ─ 30
Carrier Spacing
Sets the frequency spacing between adjacent carriers of the multi-carrier waveform.
The carriers are arranged symmetrically around the RF carrier and the maximum car-
rier spacing is limited to:
"Carrier Spacing" =
Baseband bandwidth /("Number of Carriers" - 1).
The baseband bandwidth depends on the installed options (see the data sheet).
For more information, see Chapter 5.11.2.1, "Defining the Carrier Frequency",
on page 383.
Remote command:
[:SOURce<hw>]:BB:ARBitrary:MCARrier:CARRier:SPACing on page 1048
Crest Factor Mode
Selects the mode for optimizing the crest factor by calculating the carrier phases. For
more information, refer to Chapter 5.11.2.2, "Optimizing the Crest Factor",
on page 384.
The following modes are available:
"Off"
There is no automatic setting for minimizing or maximizing the crest
factor. The "Phase" setting as defined in the carrier table is in use.
"Minimize"
The crest factor is minimized by internally calculating optimized car-
rier phases. The phase setting displayed in the carrier table is invalid.
"Maximize"
The crest factor is maximized by internally calculating optimized car-
rier phases. The phase setting displayed in the carrier table is invalid.
Remote command:
[:SOURce<hw>]:BB:ARBitrary:MCARrier:CFACtor:MODE on page 1049
Clipping
Switches the baseband clipping on and off.
Clipping reduces the peak power of the resulting multicarrier signal according to the
input parameter "Target Crest Factor". For more information, refer to Chapter 5.11.2.2,
"Optimizing the Crest Factor", on page 384.
Remote command:
[:SOURce<hw>]:BB:ARBitrary:MCARrier:CLIPping[:STATe] on page 1050
Target Crest Factor
Sets the value of the target crest factor, if baseband clipping is enabled.
A "Target Crest Factor" above the crest factor of the unclipped multicarrier signal has
no effect. For more information, refer to Chapter 5.11.2.2, "Optimizing the Crest Fac-
tor", on page 384.
Remote command:
[:SOURce<hw>]:BB:ARBitrary:MCARrier:CLIPping:CFACtor on page 1050
Filter Cutoff Frequency
Sets the cutoff frequency of the final lowpass filter, if baseband clipping is enabled.
Generating Multi-Carrier Signals
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