NI RF & SDR Systems

NI RF and SDR systems support two closely related tasks: measuring radio-frequency performance and developing the radios that generate or receive those signals. National Instruments platforms combine configurable software with RF hardware for wireless research, communications testing, spectrum analysis, and automated validation. For engineering teams maintaining established test programs, selecting compatible instruments and radio platforms can be more practical than rebuilding an entire measurement system.

NI modular RF instrumentation includes vector signal analyzers, vector signal generators, and vector signal transceivers. The PXIe-5663E analyzer and PXIe-5673E generator represent separate acquisition and generation architectures. Importantly, an instrument model may identify an assembly rather than one module. The PXIe-5663E combines a PXIe-5601 RF downconverter, PXIe-5622 intermediate-frequency digitizer, and PXIe-5652 RF signal generator serving as its local oscillator. Replacement planning must account for these modules, their interconnections, and configuration.

Vector signal transceivers bring generation and analysis together with FPGA-based processing. The PXIe-5841, for example, supports RF operation up to 6 GHz, with configurations offering up to 1 GHz of instantaneous bandwidth. Part number 786982-01 identifies a PXIe-5841 configuration with both analysis and generation. Verify the complete ordering number because bandwidth, enabled functions, and local oscillator options can differ within a model family.

For software-defined radio development, the USRP family provides programmable platforms for waveform experimentation, spectrum sensing, and multiple-input, multiple-output research. USRP RIO includes the USRP-294x and USRP-295x families. The USRP-2944, part number 783149-01, covers 10 MHz to 6 GHz and provides two transmit channels, two receive channels, and 160 MHz instantaneous input bandwidth. The USRP-2954, part number 783153-01, adds a GPS-disciplined reference oscillator to improve frequency accuracy and synchronization.

Frequency coverage and instantaneous bandwidth describe different capabilities. A radio that tunes to 6 GHz does not necessarily capture a 6 GHz-wide signal. Evaluate the required signal bandwidth alongside channel count, input limits, output power, host interface throughput, and synchronization needs. PXI Express instruments also require an appropriate chassis, controller or computer interface, available slots, power, and cooling.

Software compatibility belongs in the purchasing decision. NI-RFSA and NI-RFSG support applicable RF analyzers and generators, while compatible USRP systems can use NI-USRP with LabVIEW or UHD-based development workflows. Firmware, FPGA images, operating systems, and driver releases must match the chosen hardware and application.

Maintaining an RF system also means preserving measurement confidence. Confirm the instrument's calibration status, allow the specified warm-up period, and inspect RF connectors and cables. Excessive signal levels can damage sensitive inputs, so review attenuation and protection requirements before connecting an external transmitter.

Apex Waves helps customers source NI RF and SDR equipment for existing installations and replacement projects. When requesting a quote, provide model and part numbers, installed options, required accessories, and calibration requirements. This information helps distinguish a replacement module from a complete working instrument configuration.