National Instruments 781909-01

The National Instruments 781909-01, also known as the USRP-2922, is a versatile software-defined radio (SDR) device designed for a broad spectrum of wireless communication applications, including WiFi, WiMax, and ISM Band communication. It features a single input and output channel, ideal for systems that require basic transmit and receive functionality. The operating frequency range extends from 400 MHz to 4.4 GHz, accommodating diverse signal processing needs. This module utilizes the NI-USRP instrument driver within LabVIEW software for control and configuration. The transmitter capabilities deliver a power output range of 17 dBm to 20 dBm with an adjustable gain spanning 0 dB to 31 dB in 0.5 dB increments. The device ensures precise frequency tuning with a precision of 2.5 ppm and a step size of less than 1 kHz. It incorporates a 16-bit analog-to-digital converter (ADC) that provides an impressive 80 dB spurious-free dynamic range (SFDR), supporting real-time bandwidth up to 20 MHz for 16-bit samples and 40 MHz for 8-bit samples. The maximum I/Q sampling rate reaches 25 MS/s for 16-bit samples and 50 MS/s for 8-bit samples. On the receiver side, the device matches the same frequency range and offers a gain adjustment from 0 dB to 31.5 dB, with a maximum input power of 0 dBm and a noise figure of 5 dB to 7 dB. The receiver's 14-bit resolution ADC achieves a sampling rate of 100 MS/s and an SFDR of 88 dB, also enabling a maximum real-time bandwidth of 20 MHz for 16-bit samples and 40 MHz for 8-bit samples. The 781909-01 operates using an external 6 V, 3 A DC power supply, typically consuming 12 to 15 W. Its dimensions are 15.875 cm x 4.826 cm x 21.209 cm and it weighs 1.193 kg. Designed for indoor use, the device functions optimally within an operating temperature of 23 °C ± 5 °C and a humidity range of 10% to 90%.