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Configuration Options (FGen/Arb)

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Last Modified: December 14, 2018

The Function and Arbitrary Waveform Generator (FGen/Arb) Soft Front Panel (SFP) has different configuration options in different channel modes.

The following configuration options are available when you select the Sine mode, the Square mode, or the Triangle mode:
Setting Description
Frequency

Frequency of the waveform. You can select a desired range of the slider from the pull-down menu to the right of the slider.

Amplitude

Peak-to-peak voltage of the waveform.

DC offset

Mean amplitude displacement from zero.

Duty cycle

Percentage of the pulse width in the total period of the waveform. This option is available only if you select the Square mode.

The following configuration options are available when the instrument is in the Sweep sine mode, the Sweep square mode, or the Sweep triangle mode:

Setting Description Operational Limits
Start frequency

Frequency at which the waveform frequency sweep starts. Start frequency can be either greater than or less than Stop frequency.

Range: 200 mHz to 15 MHz

Resolution: 0.001 mHz

Stop frequency

Frequency at which the waveform frequency sweep stops. Start frequency can be either greater than or less than Stop frequency.

Range: 200 mHz to 15 MHz

Resolution: 0.001 mHz

Step

Frequency interval during a frequency sweep.

Range: 200 mHz to 15 MHz

Resolution: 0.001 mHz

Step interval

Time interval between each waveform generation during a frequency sweep.

Range: 1 ms to 86400 s

Generation mode

Mode of the waveform generation. Select Run once if you only want to generate the waveform once. Select Loop if you want to generate the waveform continuously.

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Amplitude

Peak-to-peak voltage of the waveform.

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DC offset

Mean amplitude displacement from zero.

-
Duty cycle

Percentage of the pulse width in the total period of the waveform. This setting is available only if you select the Sweep square mode.

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The following configuration options are available when you select the Custom mode. The Custom mode allows you to generate an arbitrary waveform stored in a data file.

Setting Description
Waveform file Data file you want to import. You can load CSV files from Multisim and Multisim Live and TDMS files from LabVIEW. The TDMS files must contain only analog waveform data. You can also load CSV or TDMS files exported from the Oscilloscope. The imported channel must contain 32768 samples or less.
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Note  

If the data files contain more than one channel, the instrument loads the first channel only.

Trigger source

Trigger signal.

  • Immediate—The signal generation begins immediately without any internal or external trigger source.
  • TRIG—The instrument uses the TRIGGER channel on the NI ELVIS III as the trigger signal.
Gain

Scaling factor that the instrument applies to the amplitude of the loaded waveform. The range of the output amplitude is -10 V to 10 V.

Update rate

Number of samples that the instrument generates per second. The range of Update rate is 0 MS/s to 100 MS/s. The resolution of Update rate is 0.001 S/s.

Generation mode

Mode of the waveform generation. Select Run Once if you only want to generate the waveform once. Select Loop if you want to generate the waveform continuously.

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