Specifies the method for performing the ACP measurement.

Syntax

Namespace: NationalInstruments.RFmx.WcdmaMX

public enum RFmxWcdmaMXAcpMeasurementMethod

Members

NameValueDescription
Normal0

The ACP measurement acquires the spectrum using the same signal analyzer setting across frequency bands. Use this method when measurement speed is desirable over higher dynamic range.

DynamicRange1

The ACP measurement acquires the spectrum using the hardware-specific optimizations for different frequency bands. Use this method to get the best dynamic range.Supported Devices: PXIe-5665/5668R.

SequentialFft2

The ACP measurement acquires I/Q samples specified by the SetSweepTimeInterval(string, double) method. These samples are divided into smaller chunks. The size of each chunk is defined by the SetSequentialFftSize(string, int) method, and FFT is computed for each of these chunks. The resultant FFTs are averaged to get the spectrum used to compute the ACP. If the total acquired samples is not an integer multiple of the FFT size, the remaining samples at the end of the acquisition are not used. Use this method to optimize for speed. The accuracy of results may be reduced when using this measurement method. For accurate power measurements, when the power characteristics of the signal vary over time, Averaging is allowed.
The following methods have limited support when you set the RFmxWcdmaMXAcpConfiguration.ConfigureMeasurementMethod method to SequentialFft.

  • The RFmxWcdmaMXAcpConfiguration.SetRbwFilterAutoBandwidth method will only support True value.  

  • The RFmxWcdmaMXAcpConfiguration.SetRbwFilterType method will only support FftBased value.  

  • The RFmxWcdmaMXAcpConfiguration.SetSweepTimeAuto method will only support False value.  

  • The RFmxWcdmaMXAcpConfiguration.SetAveragingCount method will only support a value of greater than or equal to 1.  

  • The RFmxWcdmaMXAcpConfiguration.SetNumberOfAnalysisThreads method will only support a value of 1.  

  • The RFmxWcdmaMXAcpConfiguration.SetAmplitudeCorrectionType Method will only support a value of RFCenterFrequency.  


Note: For multi-span FFT, the averaging count should be 1.