Specifies the method for performing the ACP measurement.

Syntax

Namespace: NationalInstruments.RFmx.TdscdmaMX

public enum RFmxTdscdmaMXAcpMeasurementMethod

Members

NameValueDescription
Normal0

The ACP measurement acquires the spectrum using the same signal analyzer setting across frequency bands. Use this method when a higher measurement speed is desirable over a 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 for a duration specified by the SetSweepTimeInterval(string, double) method. These samples are divided into smaller chunks. The size of these chunks is defined by the SetSequentialFftSize(string, int) method, and FFT is computed on each of these chunks. The resultant FFTs are averaged to get the spectrum and is used to compute ACP. If the total acquired samples is not an integer multiple of the FFT size, the remaining samples at the end of acquisition are not used for the measurement. Use this method to optimize ACP measurement speed. Accuracy of the 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 RFmxTdscdmaMXAcpConfiguration.ConfigureMeasurementMethod method to SequentialFft.

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

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

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

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


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