Multichannel RF Recording and Playback for System Validation

Engineers and operators need to carry out RF data recording in labs, anechoic chambers, or open-air ranges for validating devices under test (DUTs). This stored data is often reused for RF playback. These applications require full rate, multichannel, phase-coherent systems, including calibration routines, to capture the test environment correctly. These systems also would ideally meet the following requirements:


  • Reliable recording of raw I/Q data
  • Scalability as channel counts, data rates, and instantaneous bandwidths increase
  • Channel-to-channel phase coherence
  • Local and remote operation of fielded recording systems

NI RF Recording Solution

  • NI RF Recording Software may be used with compatible PXI Vector Signal Transceivers (VSTs) to accomplish wideband, multichannel, phase-coherent RF recordings
  • PXIe-5841 VST provides 1 GHz of instantaneous bandwidth with local oscillator (LO) sharing for phase coherence across channels 
  • PXIe-7903 High-Speed Serial Instrument utilizes a Xilinx Virtex UltraScale+ FPGA for data aggregation, inline signal processing, and offloading to external servers 
  • PXIe-8267 Data Storage Modules allow streaming to disk with sustained, reliable data throughput 
  • CDA-2990 Clock Distribution Devices provide a common 10 MHz Reference Clock to help synchronize multiple channels
  • Plugs into NI InstrumentStudio™ Software for manual control and integration with other instruments, or uses gRPC for remote control from languages including LabVIEW, Python, and C/C++

Solution Advantages

Record and Playback Systems with PXI Modular Instruments

Learn about NI’s RF Recording Solution

See how NI’s RF Recording Software allows you to use PXI Vector Signal Transceivers to accomplish wideband, multichannel, phase-coherent RF recordings.


NI offers a variety of solution integration options customized to your application-specific requirements. You can use your own internal integration teams for full system control or leverage the expertise of NI and our worldwide NI Partner Network to obtain a turnkey solution.

NI Partner Network

The NI Partner Network is a global community of domain, application, and overall test development experts working closely with NI to meet the needs of the engineering community. NI Partners are trusted solution providers, systems integrators, consultants, product developers, and services and sales channel experts skilled across a wide range of industries and application areas.

Services and Support

NI works with customers throughout the life of an application, delivering training, technical support, consultation and integration services, and maintenance programs. Teams can discover new skills by participating in NI-specific and geographic user groups and build proficiency with online and in-person training.