Configuring the Internal Baseband Source
R&S
®
SMBV100B
229User Manual 1178.4460.02 ─ 03
Remote command:
[:SOURce<hw>]:BB:ARBitrary:MCARrier:CARRier:SPACing on page 763
Crest Factor Mode
Selects the mode for optimizing the crest factor by calculating the carrier phases. For
more information, refer to Chapter 3.8.2.2, "Optimizing the Crest Factor", on page 225.
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 764
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 3.8.2.2,
"Optimizing the Crest Factor", on page 225.
Remote command:
[:SOURce<hw>]:BB:ARBitrary:MCARrier:CLIPping[:STATe] on page 765
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 3.8.2.2, "Optimizing the Crest Factor",
on page 225.
Remote command:
[:SOURce<hw>]:BB:ARBitrary:MCARrier:CLIPping:CFACtor on page 765
Filter Cutoff Frequency
Sets the cutoff frequency of the final lowpass filter, if baseband clipping is enabled.
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. This process can increase the
resulting crest factor. See also Chapter 3.8.2.2, "Optimizing the Crest Factor",
on page 225.
Remote command:
[:SOURce<hw>]:BB:ARBitrary:MCARrier:CLIPping:CUToff on page 765
Signal Period Mode
Defines the way the resulting signal period of the multi-carrier waveform is calculated.
The resulting period is always calculated for all carriers in the carrier table irrespective
of their state (ON/OFF). Use the "Carrier Table > Info" function to obtain information on
the sample rate and file length data of each carrier.
Generating Multi-Carrier Signals
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