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

RFmx VNA 2025 Q4 New Features and Changes

New Features

  • Support for one path two port measurement.
  • Support for correction level API.

Behavior Changes

  • Correction Port Subset Ports has been renamed to Correction Port Subset Full Ports. When the Correction Port Subset is Enabled, the ports specified in this subset are full N-Port corrected, where N is the number of specified ports. Correction State is made per measurement.
  • RFmxVNA Configure Correction Port Subset.vi has been deprecated. Use Correction Port Subset Full Ports attributes to configure the port subset.

RFmx VNA 2025 Q3 New Features and Changes

New Features

  • Support for CW Time Sweep Type to measure DUT parameters (S-parameters or Waves) versus Time at a fixed frequency .
  • Support for measuring group-delay using Group Delay format.
  • Support for configuring group-delay aperture as Points, Percentage or Frequency Span using the Aperture Mode property.
  • Support for Segment Trigger Mode .

RFmx VNA 2025 Q2 New Features and Changes

New Features

  • Support for Trace Math.
  • Support for Auto Detection of vCal Orientation.
  • Support for events:
    • Ready for Trigger Event.
    • Index after last sweep point acquisition complete.
  • Support for Trigger Delay.
  • Support for Distance-Velocity factor based definition for Port Extension.
  • Support for placing Normal, Fixed and Delta Markers on memory traces.
  • Support for Max, Min, Peak, Next Left Peak, Next Right Peak Marker search operations on memory traces.

Behavior Changes

  • Obsoleted property Number of Frequency Points. Use Number of Points instead.

RFmx VNA 2025 Q1 New Features and Changes

New Features

  • Support for copying measured S-parameter data and loading data from SnP file into a user-defined named memory trace.
  • Support for placing Normal, Fixed and Delta Markers on measurement traces.
  • Support for Max, Min, Peak, Next Left Peak, Next Right Peak Marker search operations on Real Data traces.
  • Support for coaxial cable loss model based Port Extension with user-defined losses for up to two frequency points.
  • Concept help documentation added.

RFmx VNA 2024 Q4 New Features and Changes

New Features

  • Support to specify polar format for S-parameters and Waves.
  • Support to query S-parameters and waves in concise notation.
  • Support for interpolation of corrected S-parameters and waves measurements.
  • Support to query correction state.

Changes

  • The following fetch VIs are deprecated:
    • RFmxVNA SParams Fetch Real Data.vi
    • RFmxVNA SParams Fetch Complex Data.vi
    • RFmxVNA Waves Fetch Real Data.vi
    • RFmxVNA Waves Fetch Complex Data.vi
  • Tip Use the following VIs to fetch measurement data:
    • RFmxVNA SParams Fetch Y Data.vi
    • RFmxVNA Waves Fetch Y Data.vi
    Tip Use the following VIs to fetch measurement frequency:
    • RFmxVNA SParams Fetch X Data.vi
    • RFmxVNA Waves Fetch X Data.vi
  • The Undefined Thru Using Defined Thru option for Correction:Calibration:Thru:Method is deprecated.
  • The Delay Thru Using Defined Thru option for Correction:Calibration:Thru:Method has been replaced by vCal Thru as Unknown Thru.
  • Uninstalling RFmx VNA software also removes any previous versions of RFmx VNA .NET runtimes that were leaked in .NET Global Assembly Cache directory.

RFmx VNA 2024 Q3 New Features and Changes

New Features

  • Support for List, Linear, and Segmented Sweep types
  • Support for exporting S-parameter measurement results as SnP files
  • Support for SWR, Impedance, and Admittance formats for S-parameters
  • Support for exporting Pulse Generator events
  • Support for aborting an ongoing calibration step

Behavior Changes

  • Deprecated RFmxVNA Configure Frequency List (Start Stop Points).vi.
    Note To work around this change, configure Sweep Type to Linear, and configure Start Frequency (Hz), Stop Frequency (Hz), and Number of Frequency properties.
  • You can no longer obtain the underlying list of aggregated frequencies across all active segments using the Sweep:Frequency List attribute.
    Note Use the Sweep:X-Axis Values read-only attribute instead.
  • The Complex format in InstrumentStudio is no longer plotted as a Smith Chart. It is now plotted as a polar chart.
    Note To plot a Smith chart, set the format to Smith Impedance or Smith Admittance.

RFmx VNA 2024 Q2 New Features and Changes

  • Support for external triggers for VNA measurements
  • Support for saving and loading stimulus settings along with Calset
  • Support for enabling and disabling automatic scaling down of Intermediate Frequency Bandwidth (IFBW) at low frequencies for measurement speed
  • Support for caching multiple signal switch for measurement speed
  • Support for guided calibration using Mechanical Calkits defined by NI Calkit files (.nckt )
  • Support for basic pulsed S-parameter and waves measurements with internal pulse-trigger
  • Support for embed fixtures to Calsets
  • Support for creating and editing Calkit files for Mechanical Calkits using the standalone Calkit Editor application.
  • Obsoleted the RFmxInstr Load All Configurations VI. Use the RFmxInstr Load Configurations VI along with the appropriate RFmxInstr Load Options property, instead.

RFmx VNA 2024 Q1 New Features and Changes

  • Calibration: User-defined orientation for Cal-5501
  • Calsets
    • Load one or more named calsets from calset files previously saved
    • Select an active calset from the pool of loaded named calsets
    • Query the names of all loaded named calsets
    • Create a named copy of another named or unnamed calset
    • Query the error terms stored in a calset
  • Support for RFmxVNA SParams and RFmxVNA Waves measurements to perform as composite measurements
  • Added port extension support to specify electrical-length as delay (in seconds) and compensate for constant loss
  • IVI simulation support for PXIe-5633

RFmx VNA 2023 Q4 Features Overview

  • Measure corrected and uncorrected 1-port or 2-port S-parameters and receiver waves for non-frequency-converting RF devices over a list of frequencies
  • Fixture de-embedding
  • Point averaging
  • Automatic Short-Open-Load (SOL) and Short-Open-Load-Through (SOLT) calibration using Cal-5501 Vector Calibration Module
  • Saving and loading calibration error terms as a calset file
  • Support for PXIe-5633