Baseband Power Commands

These commands set the power control settings for the waveform being played.

Numerical Choices:

:RADio[1]2|3|4|5|6:ARB – The numerical choices correspond to the baseband generator being configured. Refer to the block diagram of your configuration.

[:SOURce]:RADio[1]2|3|4|5|6:ARB:POWer:HCOunt <val>

[:SOURce]:RADio[1]2|3|4|5|6:ARB:POWer:HCOunt?

This command sets the hold-off sample count used to allow short intervals of samples below the threshold value to be included in the average. If the signal drops below the threshold value and remains there for fewer than the hold-off sample count, then those samples are included in the average. This command is only valid when the Input Power Source is Measure and the Power Meter Gating is Threshold.

The variable <val> is expressed in terms of samples.

Range: 0 to 216 –1

[:SOURce]:RADio[1]2|3|4|5|6:ARB:POWer:IRMS <val>

[:SOURce]:RADio[1]2|3|4|5|6:ARB:POWer:IRMS?

This command sets the input RMS power when USER is selected for the source of the power measurement.

The value <val> is expressed in volts.

Range: 0 to 1.414214

[:SOURce]:RADio[1]2|3|4|5|6:ARB:POWer:PMGating THReshold|MARKers

[:SOURce]:RADio[1]2|3|4|5|6:ARB:POWer:PMGating?

This command sets the reference to be used for power meter gating.

THReshold	This choice selects the threshold as the reference for power meter gating. Power observations are only accumulated if they are greater than or equal to the specified threshold, or if the number of consecutive observations below the threshold has not exceeded the hold-off sample count value.
MARKers	This choice uses the marked samples as the reference for power meter gating. Power observations are only accumulated for marked samples according to the specified marker selection. When the marker is turned on, the voltage for the waveform sample is used to determine the waveform RMS value. The marker control criteria is configured using the marker commands.

[:SOURce]:RADio[1]2|3|4|5|6:ARB:POWer:SAVerage <val>

[:SOURce]:RADio[1]2|3|4|5|6:ARB::POWer:SAVerage?

This command sets the number of samples to average when calculating the RMS voltage when the power source is Measure. The value entered is rounded to the nearest power of 2. When the waveform is measured during the pre-play, the PXB measures the specified number of samples that meet the criteria set by the threshold or marker settings and then uses these sample RMS voltage values to calculate the mean RMS voltage for the subsequent power calibration. Ensure that the number of samples is equal to or greater than the part of the waveform that you want to measure.

Range: 4 to 239 - 1

[:SOURce]:RADio[1]2|3|4|5|6:ARB:POWer:SOURce?

This command selects the method to use for calculating the RMS voltage value of the waveform to ensure the correct amplitude of the waveform at the output of the signal generator. The RMS voltage is used to calculate the power of the system when the power calibration is performed.

MEASure	This choice selects an internal power meter calculation to measure the input RMS power level. When Measure is selected, the power meter gating can be set to use a voltage threshold value or a marker to identify the portions of the waveform that will be measured.
LAST	This choice selects the value last used for the input RMS power level.
USER	This choice allows you to set the RMS voltage to a known value directly rather than measuring its value.
WAVeform	This choice selects the RMS voltage to be read from the waveform header. When using Signal Studio waveforms, the RMS voltage is contained in the header.

[:SOURce]:RADio[1]2|3|4|5|6:ARB:POWer:THReshold <val>

[:SOURce]:RADio[1]2|3|4|5|6:ARB:POWer:THReshold?

This command sets the sample value to use as averaging criteria when the Power Source is Measure and the Power Meter Gating is Threshold. Only samples above this level are included in the power average.

The variable <val> is expressed in volts.

Range: 0 to 1.414214

These commands set the power control settings for the waveform being played.