The Tektronix RSA306 USB Spectrum Analyser provides real time spectrum analysis, streaming capture, and deep signal capabilities for signals from 9 KHz to 6.2GHz with +20dBm to -160dBm measurement range. The highly portable package and its low cost make it an ideal instrument for field, factory, or academic use. RSA306 Spectrum Analyser runs with the full-featured Tektronix SignalVu-PC signal analysis software. Application programming interface (API) is included as well for Microsoft Windows environments. The 40 MHz real time bandwidth of the RSA306 combined with the processing power of SignalVu-PC shows every signal, even down to 100 ?s in duration.