NI Ettus USRP B205mini-i

The NI Ettus USRP B205mini-i is a compact, single-channel software defined radio module providing continuous frequency coverage from 70 MHz to 6 GHz with GPIO header access and optional GPSDO (GPS Disciplined Oscillator) support for frequency-locked operation. Building on the B200mini’s compact form factor, the B205mini-i adds GPIO expansion and GPSDO connectivity — enabling time-synchronized and location-stamped RF measurements for deployed wireless sensing, geolocation research, and distributed spectrum monitoring applications.

USRP B205mini-i Specifications

Feature	Specification
Frequency Range	70 MHz – 6 GHz continuous
Channels	1 Tx / 1 Rx (full duplex)
Instantaneous Bandwidth	Up to 56 MHz
Sample Rate	61.44 MS/s quadrature
RF IC	Analog Devices AD9364
FPGA	Xilinx Spartan-6
Interface	USB 3.0 SuperSpeed
Power	Bus-powered via USB
GPIO	Header for digital I/O
GPSDO	Optional GPS Disciplined Oscillator
Form Factor	Board-level module
Software	UHD, GNU Radio

GPSDO and GPIO Expansion

The optional GPSDO support provides GPS-disciplined 10 MHz reference and PPS (pulse-per-second) signals, enabling the B205mini-i to maintain frequency accuracy to parts-per-billion levels and timestamp captures with GPS precision. The GPIO header exposes digital I/O lines for triggering external equipment, controlling RF switches, or interfacing with custom hardware — capabilities not available on the simpler B200mini.

Applications

The B205mini-i targets deployed wireless sensing nodes, portable direction-finding systems, GPS-synchronized spectrum monitoring, drone-mounted RF payloads, and field-deployed cognitive radio installations where time-synchronized measurements and compact form factor are both required. Full UHD compatibility ensures software portability across the USRP product family.

GSAS Micro Systems provides the USRP B205mini-i as part of the NI Ettus SDR portfolio available through Digilent, with guidance on USRP model selection and UHD/GNU Radio setup for research teams across Bengaluru, Chennai, Hyderabad, Delhi NCR, Mumbai, and Pune.