Learn about updates—including new features and behavior changes—introduced in each version of the RFmx SpecAn.

RFmx SpecAn 2025 Q4 New Features and Changes

  • Support for S2P file Load for Y-Factor Noise Source Loss, External Preamp Gain and S1P file for Cold Source Input Termination in Noise Figure (NF) measurements.

RFmx SpecAn 2025 Q3 New Features and Changes

  • Support for Self-Cal Validity Check for PXIe-5860.
  • Support for DDR Enabled and Linear Memory Depth properties in DVR DPD Measurement.
  • Support for PowerList measurement.
  • Support for S2P file load for Noise Figure (NF) measurement.
  • Added Python API support.

RFmx SpecAn 2025 Q2 New Features and Changes

  • Synchronization robustness improvements for periodic modulated waveform types in AMPM, DPD and IDPD measurements.

RFmx SpecAn 2025 Q1 New Features and Changes

  • Updated minimal sample rate for NF measurement in 5840/1.
  • Support for Threshold Definition in AMPM and DPD.
  • Added support for FCnt in InstrumentStudio SpecAn.

Behavior Changes

  • AMPM: Default threshold behavior changed from “Reference Waveform >= Threshold AND Acquired Waveform >= Threshold” to “X Axis Waveform >= Threshold” where X axis could be input or output waveform as decided by Reference Power Type configuration. To switch to previous behaviour, set the AMPM Threshold Definition property value to Input AND Output.
  • DPD: Default threshold behavior in LUT DPD changed from “Reference Waveform >= Threshold AND Acquired Waveform >= Threshold” to “Reference Waveform >= Threshold”. To switch to previous behaviour, set the LUT DPD Threshold Definition property value to Input AND Output.

RFmx SpecAn 2024 Q4 New Features and Changes

  • Added DVR extension for DPD functionality.
  • Added support to reduce the IQ measurement overhead by not copying and storing the data in RFmx.

Behavior Changes

  • Uninstalling RFmx SpecAn software also removes any previous versions of RFmx SpecAn .NET runtimes that were leaked in .NET Global Assembly Cache directory.

RFmx SpecAn 2024 Q3 New Features and Changes

  • Support for PXIe-5860
  • Support for Sequential FFT mode in Spectrum measurement

RFmx SpecAn 2024 Q2 New Features and Changes

  • Support for Band Power Markers
  • Obsoleted the RFmxInstr Load All Configurations VI. Use the RFmxInstr Load Configurations VI along with the appropriate RFmxInstr Load Options property, instead.

RFmx SpecAn 2024 Q1 New Features and Changes

  • Support for Subspan Overlap in 5842 for Spectrum and Spur measurements

RFmx SpecAn 2023 Q4 New Features and Changes

  • Support for a new Marker Type called Fixed within the Markers
  • Support for IM results in dBc
  • Speed enhancements in the Equalizer Train mode of the IDPD Measurment
  • Support for obtaining unprocessed I/Q data utilized for RFmx measurements

RFmx SpecAn 2023 Q3 New Features and Changes

  • Iterative Learning Control for DPD measurement
  • Support for Noise Compensation in ACP measurement for Sequential FFT mode
  • Added support for saving and loading RFmx configurations into/from rfmxconfig files. Load from TDMS is supported but save into TDMS files is discontinued.