Since a digital signal processor, a microcontroller, or an FPGA, is programmed through software, we can say that the software portion in a receiver determines whether the radio is an SDR or not. : 70 MHz – 6 GHz (based on Analog Devices AD9361) ADC and DAC : 12 bits wide USRP B210 LimeSDR HackRF One ADALM Pluto RTL-SDR RF Range 70 MHz to 6 GHz 100 kHz to 3.8 GHz 1 MHz to 6 GHz 325 MHz to 3.8/6 GHz 500 kHz to 1.766 GHz Bandwidth 61.44 MHz 61.44 MHz 20 MHz 20 MHz 2.4 MHz ADC 12 bits 12 bits 8 bits 12 bits 8 bits MIMO 2×2 2×2 None None (officially) None FPGA Xilinx Spartan-6 Altera Cyclone IV None Xilinx Zynq Z-7010 None Duplex Full Full Half Full Rx Only