The above screen capture and image are a HackRF One controlled by GNU Radio Companion software running on a Raspberry Pi 3 Model B computer at 42% CPU load.

The Waterfall Plot is the complete 2 meter amateur radio band from 144 MHz to 148 MHz showing mostly FM stations activity.

• The signal spike at the center is DC offsets.
  • Removing DC offset in GNU Radio.

• The string of Os in the bottom of the GNU Radio screen capture occurs when program is first started.

HackRF One is a software-defined radio (SDR) with half-duplex transceiver (receiver and a very low power transmitter) capability with a very wide frequency range of 1 MHz to 6 GHz.

HackRF One interfaces to a computer with USB cable.

HackRF One interfaces to the antenna with SMA female connector.

HackRF One is open source hardware and open source hardware.

HackRF One comparison to other SDRs.

Jawbreker is the beta SDR version before HackRF One.