Arb:Phase Continuity Enabled Property

NI RF Signal Generators Help (NI-RFSG 18.1)


Edition Date: June 2018
Part Number: 371025V-01
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Short Name: Phase Continuity Enabled

Property of niRFSG

Specifies whether the driver maintains phase continuity in the arbitrary waveforms. When this property is set to Enable, NI-RFSG may increase the waveform size, and the Frequency Tolerance (Hz) property specifies the maximum allowable frequency error that can be introduced when keeping the signal phase-continuous. To set the Phase Continuity Enabled property, the NI-RFSG device must be in the Configuration state. This property only applies when the Generation Mode property is set to Arb Waveform or Script.

PXI-5671: When using the PXI-5671 with I/Q rates less than or equal to 8.33 MS/s, an input phase-continuous signal is always phase-continuous upon output, and this property has no effect.

PXIe-5644/5645/5646, PXIe-5672/5673/5673E, PXIe-5820/5840: Phase continuity is always enabled on these devices.

Supported Devices: PXIe-5644/5645/5646, PXI-5670/5671, PXIe-5672/5673/5673E, PXIe-5820/5840

The following table describes the Phase Continuity Enabled property settings with I/Q rates greater than 8.33 MS/s.

Related Topics

Phase Continuity

Arb Waveform Mode Tuning Speed Factors

Auto (-1)

When the Generation Mode property is set to Arb Waveform, the arbitrary waveform may be repeated to ensure phase continuity after upconversion. This setting could cause waveform size to increase.

When the Generation Mode property is set to Script, the Phase Continuity Enabled property indicates a warning condition. NI-RFSG cannot guarantee a phase-continuous output signal in Script mode. Phase continuity is automatically disabled in script mode, and the arbitrary waveform plays back without regard to any possible phase discontinuities introduced by upconversion.

Disable (0)

When the Generation Mode property is set to Arb Waveform, the arbitrary waveform is played back without regard to any possible phase discontinuities introduced by upconversion. The time duration of the original waveform is maintained.

When the Generation Mode property is set to Script, the arbitrary waveform plays back without regard to any possible phase discontinuities introduced by upconversion. The time duration of the original waveform is maintained.

Enable (1)

When the Generation Mode property is set to Arb Waveform, the arbitrary waveform may be repeated to ensure phase continuity after upconversion. Enabling this property could cause waveform size to increase.

When the Generation Mode property is set to Script, the arbitrary waveform plays back without regard to any possible phase discontinuities introduced by upconversion. The time duration of the original waveform is maintained.

Remarks

The following table lists the characteristics of this property.

Datatype iL
PermissionsRead/Write
High-level VIs N/A
Channel-based No
ResettableYes

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