NI USRP SDR Systems

NI USRP SDR systems combine tunable radio frequency hardware with software-defined signal processing for communications research, teaching, and wireless prototyping. USRP stands for Universal Software Radio Peripheral, while SDR means software-defined radio. Instead of relying entirely on fixed-function circuitry, engineers develop modulation, demodulation, filtering, and signal analysis in software. This flexibility supports experiments involving wireless links, spectrum sensing, cognitive radio, and multiple-input, multiple-output (MIMO) communications.

The NI portfolio includes several USRP series with different interfaces, frequency ranges, and processing capabilities. USB-connected USRP-290x devices provide a compact starting point for laboratory work. The USRP-2900, part number 784039-01, offers one transmit channel and one receive channel. The USRP-2901, part number 784040-01, provides two transmit and two receive channels for MIMO experiments. Both cover 70 MHz to 6 GHz and specify up to 56 MHz instantaneous bandwidth. Achievable streaming performance depends on the interface, active channel count, sample format, and host computer.

Ethernet-connected USRP-292x and USRP-293x models support established research and teaching systems. Examples include the USRP-2920 and USRP-2930, which cover 50 MHz to 2.2 GHz, and the USRP-2922 and USRP-2932, which cover 400 MHz to 4.4 GHz. The USRP-293x family incorporates GPS-disciplined oven-controlled crystal oscillators for improved frequency accuracy and synchronization. These timing features are useful when coordinating distributed radios, although successful synchronization still requires appropriate reference configuration and system design.

For applications requiring custom hardware processing, USRP RIO products in the USRP-294x and USRP-295x families provide programmable FPGA resources. Representative models include the USRP-2943, USRP-2944, and USRP-2954. The USRP-2954, part number 783153-01, combines two transmit channels, two receive channels, a Kintex-7 410T FPGA, and a GPS-disciplined reference clock. Its tuning range extends from 10 MHz to 6 GHz, with up to 160 MHz instantaneous bandwidth, subject to operating conditions. FPGA processing allows suitable tasks to run close to the radio hardware rather than relying exclusively on host processing.

Frequency coverage and instantaneous bandwidth describe different capabilities: tuning range identifies where a radio operates, while bandwidth indicates how much spectrum it can process at once. A broad tuning range therefore does not mean the device captures that entire range simultaneously at one frequency setting.

Software selection is equally important. Compatible NI-USRP driver releases support LabVIEW development, while supported UHD configurations enable workflows using GNU Radio and other environments. FPGA customization requires suitable hardware, development tools, and interface support; it is not interchangeable across every USRP model.

When sourcing NI USRP equipment from Apex Waves, identify the complete model and ordering part number, required frequency coverage, channel count, and bandwidth configuration. Review the existing software environment, power supply, RF cables, attenuators, antennas, and synchronization accessories before choosing a replacement. Matching these details helps preserve established laboratory workflows and avoids purchasing hardware that cannot meet the intended application.