The following figure is a sample of all the supported instruments, so some parameters may not apply to your instrument and others may not be shown.
Signal Generators Instrument Controls
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5. Dual ARB (Signal Generators) |
5. Dual ARB (PXB) |
5. Dual ARB (EXT) |
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Choice: Internal | External
Default: Internal
Double-click or use the drop-down menu to select the signal generator’s ARB reference source.
– the instrument uses its internally generated 10 MHz signal as the reference source.
– the instrument uses an external signal as the reference frequency for the baseband I/Q signal. See the signal generator’s user’s guide for information on external references.
This parameter is not available for all instrument model numbers and may be grayed out.
Range: 1 KHz to 125 MHz
Default: 100 MHz
The sample clock rate of the instrument is automatically calculated by the software. The range depends on the connected instrument.
Choices: Range: -50.00-50.00 MHz
Default: 0.00 Hz
Enter a frequency value by which the baseband frequency is offset relative to the carrier.
Choice: Off | On
Default: Off
Double-click or use the drop-down menu to enable or disable the instrument's high crest mode.
– processes high-crest-factor arbitrary I/Q waveforms with less distortion. For crest factors higher than 4 dB, you should reduce I/Q Modulation Attenuation levels by 1 dB for each dB above that level. High crest mode reduces the maximum output level and degrades power level accuracy.
– disables the high crest mode.
This parameter is not available for all instrument model numbers and may be grayed out.
Choice: Auto | 2.1 MHz | 40 MHz | Through
Default: Auto
Double-click or use the drop-down menu to select an I/Q modulation filter value.
This parameter is not available for all instrument model numbers and may be grayed out.
Choice: Auto | 40 MHz | Through
Default: Auto
Double-click or use the drop-down menu to select an I/Q output filter value.
This parameter is not available for all instrument model numbers and may be grayed out.
Choice: Auto | Manual
Default: Auto
Set the modulation attenuation mode for the I/Q modulator to automatic or manual.
– the instrument optimizes the modulation attenuation for the current conditions.
– applies the value set in the cell.
Range: 0 to 40 dB (minimum increment 0.01 )
Default: 6.00 dB
Use this parameter to reduce the signal level driving the I/Q modulation block. Adjusting the attenuation may reduce signal distortion and improve the overall dynamic range.
Set the Modulation Attenuation Mode to to enable this parameter.
Range: 0.250 to 100.00 MHz
Default: 10.00 MHz
Enter a frequency value when using an externally supplied reference signal. See the signal generator’s user’s guide for information on external references.
Set ARB Reference to to enable this parameter.
This parameter is not available for all instrument model numbers and may be grayed out.
Choice: Internal | External
Default: Internal
This parameter is not available for all instrument model numbers and may be grayed out.
Range: 1 to 100% (100% = no scaling)
Default: 92%
Enter a scaling value for the instrument to apply to the waveform while it is playing. Use scaling to get the best dynamic range without overflowing the I and Q digital-to-analog converters (DAC) and to reduce the overshoot associated with the DAC interpolation filter. Waveform Runtime Scaling does not change the data in the waveform file.