The National Instruments 783923-01, also referred to as the USRP-2940R, is a high-performance software-defined radio (SDR) device tailored for versatile wireless communication applications. This model features two transmitter channels and two receiver channels, capable of operating within a broad frequency range of 50 MHz to 2.2 GHz. With finely-tuned frequency steps of less than 1 kHz, it offers exceptional precision in frequency control and supports a maximum real-time bandwidth of either 40 MHz or 120 MHz, depending on the variant.

The transmitter section delivers adjustable output power ranging from 50 mW to 100 mW (17 dBm to 20 dBm) across frequencies up to 1.2 GHz and from 30 mW to 70 mW (15 dBm to 18 dBm) for frequencies extending to 2.2 GHz, with a gain range of 0 dB to 31 dB in 1 dB increments. An advanced 16-bit digital-to-analog converter (DAC) contributes to signal fidelity, featuring a spurious-free dynamic range (SFDR) of 80 dB. For the receiver section, it mirrors the broad frequency coverage, supporting a gain adjustment from 0 dB to 37.5 dB in 0.5 dB steps, along with a noise figure of 5 dB to 7 dB for enhanced signal reception in demanding conditions. A 14-bit analog-to-digital converter (ADC) ensures high-resolution signal processing with an impressive 88 dB SFDR.

Designed with a power requirement of 9 V to 16 V DC and a maximum input current of 7.5 A, the typical power consumption varies between 38 W and 44 W. The device is equipped with 1,024 MB of onboard DRAM to optimize data handling during real-time operations. It measures 26.67 cm × 4.06 cm × 21.84 cm and weighs 1.588 kg, making it both compact and lightweight. Operating within a temperature range of 23 °C ± 5 °C and relative humidity between 10% and 90% (non-condensing), the 783923-01 complies with stringent safety and compliance standards including IEC 61010-1, EN 61010-1, and UL 61010-1, as well as electromagnetic compatibility (EMC) regulations such as EN 61326-1 and FCC 47 CFR Part 15B.