Specifies the method for performing the adjacent channel power (ACP) measurement.

Syntax

Namespace: NationalInstruments.RFmx.EvdoMX

public enum RFmxEvdoMXAcpMeasurementMethod

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 for a duration 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 on each of these chunks. The resultant FFTs are averaged to get the spectrum and is 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 acquisition are not used for the measurement. Use this method to optimize the ACP measurement speed. The 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 RFmxEvdoMXAcpConfiguration.ConfigureMeasurementMethod method to SequentialFft.

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

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

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

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

Note

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