General Settings (BBG)

 

Settings

Enabled

Choices: On, Off
Default Value: On

Turns the state of the selected baseband generator on and off. Turning Enabled off while a signal is playing effectively replaces the I/Q and marker data with zeros.

 

Sample Rate

Range: 1 Sa/s to 200 MSa/s
Default Value: Varies, depending on the chosen configuration
Resolution: 1 Sa/s
 

Displays and sets the rate at which the selected waveform file is played from the baseband generator. When a waveform file is selected, this value is read from the file header if the file has a header. If the selected waveform file does not have a header, the sample rate will not change from the previously set value.  

 

Trigger Delay 

Range: 0 to at least 21 seconds (depends on the waveform application)
Resolution: 5 ns
Default Value: 0 seconds

Sends the trigger signal to the baseband generator after the specified period.

 

Runtime Scaling

Range: –60 dB to 0 dB
Default: 0 dB
Resolution: 0.01 dB

Adjusts the scaling of the I and Q data. Reducing the runtime scaling prevents the over ranges from happening. Runtime scaling is also used to scale signals relative to each other in any "Generate and Sum" or MIMO configurations where channel summing occurs. When a waveform file is selected, this value is read from the file; however, it may be changed, even while the waveform is playing.

The 0 dB default value is a good value for most configurations and waveforms. However, there could be waveforms whose RMS is at or close to the max (1 VRMS) which could overrange the baseband generator. Use Runtime Scaling to prevent such overrange conditions.

 

Frequency Offset

Range: –60 MHz to 60 MHz
Default Value: 0 Hz
Resolution: 0.01 Hz 

Moves the baseband signal above or below the carrier by the specified frequency. When simulating adjacent channel interferers, this allows you to offset the waveforms to avoid overlap between the waveforms. When a waveform file is selected, this value is read from the file; however, it may be changed, even while the waveform is playing. 

 

 

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Related Topics

Marker Generation
Power Calibration Settings

Power Calibration Graphics